Unloaded vibration isolator of large carrying capacity

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry. Vibration isolator includes a housing with a rectangular flange, two elastic sleeves from wire material of metal rubber, which are arranged in it, a cover, a tightening element and fastening parts. A cylindrical wall of the housing projects on both sides of its base to the height of the sleeve in free state. A vibration isolator bottom is attached to the housing flange by screws. The tightening element is made in the form of a hollow cylinder with a round flange. A flat supporting platform with central and threaded holes is made on outer surface of the flange. The tightening element is arranged in central holes of elastic sleeves and the cover. Specified value of axial preload of elastic sleeves is created by tightening of a round nut that is screwed on a threaded end of the tightening element and under which elastic and lock washers are installed. An unloading spiral compression spring with high flexibility is arranged inside the slot of the tightening element. The spring is fixed along the round thread in a support made at the vibration isolator bottom. The cover is screwed from above onto the spring along round thread. Between the cover and the cylinder bottom there arranged is a support the ball stop of which is borne against the spring cover, and its outer surface is borne against the cylinder bottom of the tightening element.

EFFECT: achieving increase in carrying capacity and service life of a vibration isolator.

8 cl, 11 dwg

 

The invention relates to a vibration-insulating-metal devices, medium and large capacity, capable of working in a hostile environment, in vacuum, in terms of radiation and elevated temperature (up to 450°C).

Known vibration absorber (see Cats AS the Calculation Provedeniya characteristics of vibration isolators of the Mr material.// Abstract dissertatsii on competition of a scientific degree of candidate of technical Sciences. - Samara - 2007), comprising a housing, two tapered elastic sleeve of woven wire material Mr ("- Metal"), the cover, the Central sleeve, the clamping shoulder screw and fastener - washer, slotted nuts and cotter pins. On the housing, the cover and the center hub is made small concentric flange, which are centered bushings from Mr and creates a radial interference fit. Axially clamped in the sleeve of the Mr is created by twisting the lower slotted nut (if the axis of insulator vertical) to lock the cover to the flange of the clamping screw and the end of the Central sleeve in the cover and in this position the nut splinters. The body of the insulator has a flange, to which the vibration absorber is attached to the base. Vibrotherapy object is placed on the cover and secured with a washer, a second slotted nut and cotter pin.

The vibration absorber can be used in spatial loading. His pregievoli work in duplex upregulating it stops at loading in all six degrees of freedom. Among its positive qualities should include its relatively small size and weight, simplicity of design and its manufacturing technology.

The technical nature of this vibration absorber closest to the proposed and adopted for the prototype.

However, this vibration absorber has a number of serious shortcomings.

Material Mr bad tensile and torsional and lateral vibrations of the object in the places of the elastic bushings where they are in contact with the centering shoulder, you may experience tensile stresses leading to local rupture of the material of the sleeves.

In the literature (see Cats AS the Calculation provedeniya characteristics of vibration isolators of the Mr material.// Abstract dissertatsii on competition of a scientific degree of candidate of technical Sciences. - Samara - 2007), which describes the design of insulator not covered by the conditions that you must follow when creating a workable, heavily loaded of insulator with progesterone elements made of Mr material, satisfying THE customer, and not opened their physical meaning (see below).

Elastic sleeve insulator is made unidirectional by pressing the workpiece along the vertical axis of the sleeve. Therefore, the angles of inclination to the axis of the sleeve planes of the main mass of coils inside its volume is mA little different from direct and significant radial dynamic loads will be residual radial deformation, which will be to grow rapidly at the time.

Products of Mr material, made of unidirectional pressing, work best in compression in the direction of pressing.

The prototype of the upper elastic sleeve is much more loaded than the bottom, since the loading of insulator weight of the object it zagrujaetsa by the same process by which it was loaded when you create axial tension, and the lower elastic sleeve when it is unloaded and the result is less loaded condition even in comparison with the state of it after its axial tension.

As a result, when the dynamic loading of insulator loading the upper sleeve is described by the hysteresis loop are either partly or entirely lying on the "tails" of the field it progesteronic loops, which greatly impairs progesterone characteristics (UFH) of insulator, increases congestion and resonance frequency vibroisolating object, which in turn leads to the emergence of "shrinkage" of the bushing material and reduction of axial tension bushings. Moreover, as developments increase "shrinkage and residual radial deformation increases the density of the material of the sleeves. In addition, due to the wear increases the friction on the contact surfaces of coils. All of this will lead to the fact that the working loop is the hysteresis of insulator further will be "pushed out" to "tail" field, will increase srednetehnicheskoe the rigidity of the insulator, and hence the resonant frequency of the dynamic system "object-vibration isolators", the scattering coefficient of the insulator will be reduced and, consequently, will increase the dynamic loads acting on the object. Moreover, the intensity increases the adverse impact of these factors will continuously increase as the lamp. Naturally, the intensity increases these adverse factors strongly depends on the successful choice of the initial design parameters of the vibration damper.

The disadvantages of the prototype should also be attributed to the absence of elastic compensating for the loss of axial tension in the mean time, due to the rigid bonding of the cover with the Central bushing. As a result, as shown by the experience of the operation of the vibration damper, by reducing the axial preload decreases the force of tightening slotted nuts, despite their kontrolka pins, and occasionally have their paxathipatai and splitout.

Therefore, the task of development of insulator high capacity (with the same range of capacities to or larger than the prototype), which in torsional and lateral vibrations of the object did not occur "Zakus" material elastic sleeves and local break him axial "shrinkage and radial residual shear deformation of the material Mr bushings in the process of elaboration did not require periodic peresasyvaniya slotted nuts and their spontania, moreover, the vibration absorber compared to the prototype would be the best UFH, and, therefore, the dynamic system vibrotherapy object - vibration isolators" would have a lower resonant frequency and the object was affected less dynamic overload in the resonance zones, and in the above-resonance, and therefore, the proposed vibration absorber would be more life than the prototype.

The problem is solved in that a vibration absorber VBGR large capacity, unloaded, comprising a housing with a rectangular flange with holes for attaching the insulator to a support placed therein with radial and axial tension two tapered elastic sleeve of the wire material MP, made unidirectional by pressing in the direction of the axis of the sleeve, the cover is placed in the Central hole of the sleeves and cap coupling element and a fastener, wherein the cylindrical wall of the housing acts on both sides of its conical base to the height of the sleeve in a free state, to the flange of the housing by screws attached to the bottom of the insulator, the clamping element is designed the form of a hollow cylinder with a circular conical flange with an outer diameter less than the internal diameter of the cylindrical wall of the casing at two turns of the insulator in the radial e.g. is the pressure, and on the outer surface of the flange is planar support platform with a Central hole and one, two or more screw holes, coupling element with a given radial preload is placed in the Central hole of the elastic bushing, the diameter of the inner bore of the conical base of the housing into two radial stroke larger than the diameter of the smooth cylindrical portion of the clamping element, a conical cover is centered on the smooth cylindrical portion of the clamping element and the outer bearing surface is planar, and its outer diameter equal to the outer diameter of the conical flange of the clamping element, the desired axial preload of the elastic bushings created by tightening all the nuts that screw onto the threaded end of the tie element, and which has one, two or more elastic washer, locking washer, one condition of which is bent into the groove of the nut, and the other in the groove of the clamping element, inside of which with a small axial preload posted by unloading a helical compression spring with great give - for example, its deformation under the action of the weight force G vibroisolating object attributable to the vibration absorber, 5-10 times more likely to exceed the deformation of the elastic compression sleeves when exposed to this force, the spring round thread fastened to the pole, is made at the bottom, and SV is the Rhu village, it is on the spring also on all the threads screwed cap, the outer diameter of which is two moves of the insulator in the radial direction smaller than the diameter of the inner hole of the cylinder of the clamping element, in which is placed a spring, the spring and cap from unscrewing thecontrary matumi on the wall support and the skirt of the lid between the lid and the bottom of the cylinder centered on its inner wall and with the possibility of bias without distortions along the axis vibrocorer posted by support that the ball stop ball, zahlcovany in the rod with the possibility of free rotation about the bonnet, and the outer surface at the bottom of the cylinder of the clamping element with a small force, created a small axial preload spring, sharp edges of the elastic bushing, the cylindrical wall of the casing, cap, conical flange coupling element and the junction of the casing wall with its base and tapered flange with the clamping element rounded radii in feet of an object, which he put on vibration isolators, the specified length is screwed into the fingers, thecontinue locking nut, which when mounted object on vibration isolators enter the Central hole of the support sites of the flanges of the clamping elements and press the bearings with ball stop and the spring so that the legs are pressed against the frame flange coupling element, and vibrotherapy object in this position, scraplets the screws, for each cylinder, which has a washer and locking washer with unbendable mustache, and the length of the pin and the threaded part is chosen such that the selection of the length of the insertion of a finger could be provided to discharge the spring of each insulator took the full force of the weight of the object attributable to the vibration absorber, or only given her share.

Compared with the prototype strain due to axial and radial tightness, more evenly distributed on all of the boundary surfaces of the bushings, which significantly improves UFH offer of insulator. The prototype when loading vibrocorer constant force G is cyclic and dynamic power with the maximum amplitude of the specified technical task deformation of the bushings under the action of a constant force will be much more deformation of these bushings under the action of only one constant force as the center of the hysteresis loop under the action of the continuous way of power will shift point with the ordinate G process with stiffness equal to the lower stiffness of the stiffness of the processes limiting the loop, and elastic sleeve operating in duplex upregulating emphasis will be loaded on the hysteresis loop, either lying on the "tail" field progesterone loops or partially exciting the "tail"that much wkhuds is no UFH of insulator and leads to the above consequences.

The proposed elastic insulator sleeve fully or partially unloaded from the action of a constant force G.

As a result of its elastic sleeve over the entire operating range of the load on the hinges without "tails", which significantly improves UFH of insulator - significantly reduces srednetehnicheskoy stiffness bilateral upregulating stop (bushing) and increases its scattering coefficient. And srednetehnicheskoe rigidity of the entire vibration damper with regard to the unloading stiffness of the spring can be significantly smaller than the prototype, as in this case, you can use elastic sleeve made of Mr material with lower density.

As a result, the application of the proposed vibration damper will reduce the dynamic loads acting on the system vibrotherapy object - vibration isolators", to expand the range of permissible dynamic loads, to reduce the resonance frequency of the system, significantly reduce the intensity increase of the "shrinkage" of the sleeves and deterioration UFH of insulator at the time, and, consequently, to increase the life of its operation.

The absence of the proposed vibration damper of the shoulder at the base, the lid and the flange of the clamping element, which in the prototype centered elastic sleeve and created in them the tightness, the presence of rounding sharp edges at the wall of the building is sa, flange coupling element and the cover in contact with the material of the elastic sleeves, and rounding sharp edges themselves elastic bushings eliminates the possibility of "drafts" of the material of the sleeves and the emergence of local discontinuities in the material.

Install spring washers under the round nut and clamping screws eliminates unacceptable weakening of their torque at the time and, therefore, there is no need of their Peresetsky and securing in the process of operation.

The lowest residual strain and its rate of accumulation in the mean time ceteris paribus get products from wire material MP running on cyclic compression. The time of accumulation of permanent deformation to an invalid size is determined by the resource of these products.

Therefore, to increase resource insulator serves vibration absorber VBGR large capacity, unloaded, wherein the elastic sleeve is made of successive pressing of the workpiece in the radial and axial directions, and the degree of deformation of the workpiece at each of these operations phases pressing chosen so that the plane of coils of the main mass of coils in the volume of the sleeve is inclined to the vertical axis of the vibrator angles φ lying in the range of 45°≤φ≤α, where α is the angle equal to half the cone angle in ulki.

In this case, the portion of the shear deformation of the elastic bushings at their radial dynamic loading is reduced and decreases the slew rate of the residual shear strain of the sleeves, thereby increasing the service life of the insulator.

To improve progesterone properties of insulator serves vibration absorber VBGR, characterized in that it discharge spring made of woven three-lived.

In view of the complexity of manufacturing three springs high load capacity the load capacity of the insulator must be less than the previous design, and progesterine element of insulator only partially unloaded from the force G.

To improve impact properties of insulator serves vibration absorber VBGR, characterized in that its bottom is fixed to the shock-proof cushion, custom axial pressing of the Mr material high density.

In addition, it is proposed vibration absorber VBGR, characterized in that it is made with a cylindrical elastic sleeves, and the tilt angles of the planes of the coils to the vertical axis of the sleeve from the main mass of coils of material sleeve little different from 45°, and the base, the cover and the flange of the clamping element is designed with flat support surfaces.

To improve UFH vibration absorber and protect it from dust and dirt offers vibration absorber VBGR, characterized in that between the flange of the coupling element and the elastic sleeve and between the lid and the other elastic sleeve mounted remote spacers, centering on the wall of the housing, with a Central hole with a diameter equal to the diameter of the hole of the base body, and the sharp edges of the spacers rounded radii.

The use of remote sensing spacers improves plot the distribution of the compressive axial load on the bearing surfaces of the elastic sleeves, and, therefore, improves UFH of insulator and protects from dust and dirt in the elastic sleeve.

The considered structures vibration isolators VBGR the unloading stiffness of the spring on the shift is not included in the rigidity of the vibration damper on the shift due to the smallness of the forces of rolling friction between the ball of the ball stop and the bonnet.

If the resonance frequency shear waves of the object obtained by the inclusion of the shear stiffness of the unloading of the spring in radial directions, admissible, the design of the proposed vibration damper can be simplified due to the absence in its design supports with ball stop.

Features vibration absorber VBGR, characterized in that the cover is spring in the unloaded state of the vibration damper force generated by the axial tension unloading of a spring pressed directly to the bottom of the cyl the echoes of the clamping element, and between the cover and the cylinder wall has a concentric gap slightly smaller or equal to the course of the insulator in the radial directions.

In this case, when a small shear radial displacements of the spring, for which there is no mutual slippage of the finger relative to the cover, the shear stiffness of the spring is fully included in the shear stiffness of the vibration damper, and when the shear displacement at which there is mutual slippage of these elements, approximately it can be assumed that the shear stiffness of the vibration damper is included srednetehnicheskoe stiffness of the hysteresis loop, which is loaded these elements when shear deformation of the insulator, and this stiffness is less than the shear stiffness of the spring in radial directions.

In addition, it is proposed vibration absorber VBGR different from the previous in that the bonnet is centered on the cylinder wall of the clamping element and has the ability without jamming to move along the axis of the cylinder, and between the spring and the cylinder wall has a concentric gap slightly smaller or equal to the course of the insulator in the radial directions.

In this case, when any admissible displacement of insulator all shear stiffness of the unloading of the spring included in the shear stiffness of the vibration damper.

Design the proposed vibration isolators are illustrated by the figures, which mounting insulator to the object and the base shows how "the situation" on the Assembly drawing thin solid line.

1 shows a section along a-a in figure 2 of insulator VBGR with tapered sleeves.

Figure 2 shows a top view of the vibration damper.

Figure 3 shows a section along a-a in figure 2 of insulator VBGR with tapered sleeves, after fixing it vibroisolating object.

Figure 4 shows a section along a-a in figure 2 of insulator VBGR with tapered sleeves with shockproof cushion.

Figure 5 shows a section along a-a in figure 2 of insulator VBGR with tapered sleeves, three-core unloading spring and shockproof cushion.

Figure 6 shows a possible variant of insulator VBGR with tapered sleeves.

Figure 7 shows the vibration absorber VBGR with cylindrical sleeves.

On Fig depicted vibration absorber VBGR with cylindrical bushings, distance spacers and shockproof cushion.

Figure 9 shows a fragment of insulator VBGR with cylindrical bushings with remote spacers, on delivery, to cover the discharge of the spring, directly resting in the bottom of the cylinder of the clamping element, with concentric gap between the lid and the cylinder wall.

Figure 10 shows a fragment of the same fibrous is the system, but with cap unloading spring, centering on the cylinder wall of the clamping element.

Figure 11 depicts the qualitative field progesterone loops of elastic bushings under cyclic loading of insulator various types of loads.

The proposed vibration absorber VBGR large capacity, unloaded (see figure 1 and 2) includes a housing 1 with a rectangular flange 2 with holes 3 for attaching the insulator to the base 4 (see figure 3)placed therein with radial and axial tension two tapered elastic sleeve 5 (see figure 1) wire material MP, made unidirectional by pressing in the direction of the axis of the sleeve, a conical cap 6, is placed in the Central hole 7 of the bushing 5 and the cover 6 of the coupling element 8, the discharge helical compression spring 9, the cover of the spring 10, the support 11 with ball stop 12 with zahlcovany to him with freedom of rotation of the ball 13, a bottom 14 and fasteners.

Cylindrical wall 15 of the housing 1 acts on both sides of its conical base 16 at the height of the sleeve 5 in the free state. The bottom 14 by screws 17 is attached to the flange 2 of the housing 1. The clamping element 8 is made in the form of a hollow cylinder 18 with a circular conical flange 19 with an outer diameter less than the internal diameter of the cylindrical wall 15 of the housing 1 at two turns of the insulator in the radial direction, the outer surface of the flange 19 is planar support platform 20 with a Central hole 21 and one, two or more screw holes 22 (see figures 1 and 2). The clamping element 8 (see figure 1) with a given radial preload is placed in the Central hole 7 of the elastic bushings 5, the Diameter of the inner bore 23 of the conical base 16 of the housing 1 at two radial stroke larger than the diameter of the smooth cylindrical part 24 of the clamping element 8. Conical cap 6 is centered on the smooth cylindrical part 24 of the clamping element 8, and its outer bearing surface 25 is planar. The outer diameter of the cover 6 is equal to the outer diameter of the conical flange 19 of the clamping element 8. The desired axial preload of the elastic bushings 5 created by tightening all the nuts 26, which screw onto the threaded end of the coupling element 8, and which has one, two or more elastic washer 27, and locking washer 28, one condition of which is bent into the groove of the nut 26, and the other in the groove of the clamping element 8. Inside the clamping element 8 with a small axial preload posted by unloading coiled compression spring 9 with great give - for example, its deformation under the action of the weight force G vibroisolating object attributable to the vibration absorber, 5-10 times more likely to exceed the compression deformation of the elastic bushings 5 when exposed to this force. The spring 9 on all the threads fastened to the pole 29, performed on day 14. On top of the spring 9 also round resistiveness cover 10, the outer diameter of which is two moves of the insulator in the radial direction smaller than the diameter of the inner bore 30 of the cylinder 18 of the clamping element 8, in which is placed a spring. The spring 9 and the cover 10 from loosening thecontrary matumi 31 on the wall of the bearing 29 and the skirt of the cover 10. Between the cover 10 and the bottom 32 of the cylinder 18 with the center on its inner wall and with the possibility of bias without distortions along the axis vibrocorer posted by bearing 11, which ball stop 12, ball 13, zahlcovany it with the possibility of free rotation about the cover 10 of the spring 9, and the outer surface of the bottom 32 of the cylinder 18 of the clamping element 8 with a small force, created a small axial preload of the spring. Sharp edges of the elastic bushings 5, the cylindrical wall 16 of the housing 1, the cover 6, the conical flange 19 of the clamping element 8 and the junction of the wall 15 of the housing 1 with its base 16 and the conical flange 19 with the clamping element 8 rounded radii. In the tabs 33 of the object 34 (see figure 3), which he put on vibration isolators, the specified length is screwed into the fingers 35, thecontinue locking nut 36, which when mounted object 34 on the vibration isolators are included in the Central hole 21 of the support pads 20 of the flanges 19 of the clamping elements 8 and press the bearing 11 with ball stop 12 and the spring 9 so that the legs 33 are pressed against the frame 20 of the flange 19 article is mportant element 8, and vibrotherapy object in this position is fixed by screws 37. Under each head screws 37 are installed elastic washer 38 and locking washer 39 with unbendable mustache. The length of the finger 35 and the threaded part is chosen such that the selection of the length of insertion of the finger can be set to unloading the spring 9 each insulator took the full force of the weight of the object 34, attributable to the vibration absorber, or only given her share. Vibration absorber screws 37, under the heads of which also have elastic washer 38 and locking washers 39, fixed to the base 4.

The elastic sleeve 5 can be made consistent by pressing the workpiece in the radial and axial directions (fiigure not shown), and the degree of deformation of the workpiece at each of these operations phases pressing chosen so that the plane of coils of the main mass of coils in the volume of the sleeve is inclined to the vertical axis of the vibrator angles φ lying in the range of 45°≤φ≤α, where α is the angle equal to the half angle of the cone sleeve.

Also proposed the following construction of insulator VBGR large capacity, unloaded, with conical and cylindrical elastic sleeve (design of these vibration isolators are clearly visible in the figures and are not described in detail):

vibration absorber VBGR (see figure 4) with sakralen is in the bottom 40 shockproof cushion 41, produced by the axial pressing of the Mr material high density

vibration absorber VBGR (see figure 5) to the relief spring 42, woven of three lived;

vibration absorber VBGR made in the implementation shown in Fig.6, which is mainly characterised by the design of the bottom 43 of the insulator.

vibration absorber VBGR (see Fig.7), is made with a cylindrical elastic sleeve 44, in which the angle of inclination of the planes of the coils to the vertical axis of the sleeve from the main mass of the coils of the bushing material differ little from 45° (Fig. not shown), and the base 45 of the housing 46, the cover 47 and the flange 48 of the clamping element 49 is made with flat support surfaces;

vibration absorber VBGR (see Fig), which between the flange 48 of the clamping element 49 and the elastic sleeve 44 and between the cap 47 and the other elastic sleeve 44 mounted remote spacers 50, centering on the wall of the housing 46, with the Central hole 51 with a diameter equal to the diameter of the hole 52 of the base 45 of the housing 46, and the sharp edges of the spacers 50 are curved radii;

vibration absorber VBGR (see Fig.9), at which the cover 53 of the spring 54 in the unloaded state of the vibration damper force generated by the axial tension unloading of the spring 54, is pressed directly to the bottom 55 of the cylinder 56 of the clamping element 49, and between the cover and the wall of the cylinder 56 has a concentric gap 57 is slightly smaller and is equal and the course of the insulator in the radial directions;

vibration absorber VBGR (see figure 10), which cover 53 of the spring 54 is centered on the cylinder wall 56 of the clamping element 49 and is able without jamming to move along the axis of the cylinder, and between the spring 54 and the wall of the cylinder 56 has a concentric gap 58, slightly smaller or equal to the course of the insulator in the radial directions.

Build different versions of the proposed vibration isolators VBGR little different from each other. Therefore, we consider only the Assembly of insulator VBGR (figure 1 and 2).

In case 1 set of the elastic sleeve 5. To install the coupling element 8 and the radial tension in the sleeve 5 is used technological intake cone. Depending on the height of the sleeve 5 and the design of the clamping element 8 it can nevinovate on the threaded end of the clamping element to another in a smooth part of the cylinder 18, or through the internal thread to an intact into the cylinder until it stops in the end or not to connect with coupling element 8 (technological intake cone and possible options for its use on the figure not shown). Smaller diameter chamfer less than the diameter of the Central hole of the sleeve 5 in the free state and greater equal to or slightly larger than the diameter of the smooth portion of the cylinder 18 of the clamping element 8. With a given radial tensioning insert the clamping element 8 (with intake what UNOSOM) in the Central hole 7 of the elastic bushings 5 to the stop flange 19 in the elastic sleeve 5 and clean technological intake cone. Consistently wear on the coupling element 8 of the cover 6, one, two or more elastic washers 27 and locking washer 28, screw round nut 26, tighten it until a specified axial tension in the elastic bushing 5, which is controlled by the size between the outer face of the round nut 26 and a flat reference area 20 of the flange 19. Then) round nut 26. The spring 9 is screwed into the support 29 of the bottom 14 and screw the lid 10. The spring 9 and the cover 10) matumi 31 wall support 29 and the skirt of the cover 10. Establish a support 11 with ball stop 12 and the bottom 14 mounted on it by the spring 9 and the cover 10 and secure the bottom 14 to the housing 1 by screws 17, which from unscrewing) the paint so that the paint does not interfere with accurate installation of insulator in the workplace.

In the workplace the vibration isolators VBGR (see figure 3) fixed to the base 4 by screws 37 with spring washers 38 and locking washers 39. In the tabs 33 vibroisolating object 34 on the specified length is screwed fingers 35) and their nuts 36. Set the object 34 on vibration isolators, with the tabs 33 are mounted on a platform 20 of the vibration isolators. Fix the object 34 on the insulators screws 37, the resilient washers 38 and locking washers 39.

Loaded with any of insulator VBGR its elastic bushings are bilateral upregulating pack the RA - one sleeve is loaded, unloaded another, or one half of each sleeve is loaded, and the other half is unloaded. When complete unloading of the elastic bushings from the action of a constant force G - weight vibroisolating object acting on the vibration absorber, its elastic sleeve under the influence of periodic dynamic loads are loaded on processes field progesterone loops depicted on 11 thickened solid line. The parameters of the proposed vibration isolators VBGR are chosen so that under the action of dynamic loads less than or equal to a valid, working loop 59 (see 11) were without "tails" 60 or, if necessary, with a small "tails". Shock load is allowed uploading of insulator process with the "tail".

The center of the field of "working" loops is at the point O (0,0) is the unloaded state of the elastic bushings. In this case, the proposed vibration isolators VBGR will be the best possible UFH and, consequently, the operating settings of the insulator will be wider, the resonance frequency of the system vibrotherapy object - vibration isolators will be lower and lower will be the dynamic loads acting on the object, as the resonances, and in the above-resonance workspaces. Hence the greater will be the life of the vibration isolators.

Proposed is appropriate vibration isolators VBGR work with all types of dynamic loads, valid on all six degrees of freedom. They have a damping 2.5-3 times larger and allow specific dynamic load (in terms of unit volume upregulating element), five times greater than that of the vibration isolators rubber progesterone elements. When a large load their dimensions will be substantially smaller than the dimensions of the vibration isolators same capacity with rubber progesterone elements. They are calculated and can be operated in a hostile environment, in conditions of radiation, vacuum and high temperature. Their advantages in comparison with the prototype described above.

Moreover, in most practical cases, the vibration isolators will be different according to the magnitude of the components of the weight of the object in the work place by screwing in the finger 35 on different length in feet 33 of the elastic bushing insulators VBGR can be unloaded from the action of these components.

1. Vibration absorber of high capacity unloaded, comprising a housing with a rectangular flange with holes for attaching the insulator to a support placed therein with radial and axial tension two conical or cylindrical elastic sleeve of the wire material-metal made unidirectional by pressing in the direction of the axis of the sleeve to the cap, placed in the Central hole of the sleeves and cap coupling element and a fastener, wherein the cylindrical wall of the housing acts on both sides of its base to the height of the sleeve in a free state, to the flange of the housing by screws attached to the bottom of the insulator, the clamping element is designed as a hollow cylinder with a circular flange with an outer diameter less than the internal diameter of the cylindrical wall of the casing at two turns of the insulator in the radial direction, performed conical to conical elastic sleeves or cylindrical to cylindrical elastic sleeves, and on the outer surface of the flange is planar support platform with a Central hole and one, two or more screw holes, coupling element with a given radial preload is placed in the Central hole of the elastic bushing, the diameter of the inner bore of the case base, tapered to a conical elastic sleeves and flat to cylindrical elastic sleeves, two radial stroke larger than the diameter of the smooth cylindrical portion of the clamping element, the cover is made conical to conical elastic sleeves and flat to cylindrical elastic sleeve and centered over the smooth cylindrical portion of the clamping element and the outer bearing surface is planar, and the outer is first diameter equal to the outer diameter of flange coupling element, the desired axial preload of the elastic bushings created by tightening all the nuts that screw onto the threaded end of the coupling element and which has one, two or more elastic washer and locking washer, one condition of which is bent into the groove of the nut, and the other in the groove of the clamping element, inside of which with a small axial preload posted by unloading a helical compression spring with the big give, for example, its deformation under the action of the weight force G vibroisolating object attributable to the vibration absorber, 5-10 times more likely to exceed the deformation of the elastic compression sleeves when exposed to this force, the spring on all the threads fastened to the pole, is made at the bottom, and on top of the spring is also on all the threads screwed cap, the outer diameter of which is two moves of the insulator in the radial direction smaller than the diameter of the inner hole of the cylinder of the clamping element, in which is placed a spring, the spring and cap from unscrewing thecontrary matumi on the wall support and the skirt of the lid between the lid and the bottom of the cylinder centered on its inner wall and with the possibility of bias without distortions along the axis of insulator placed reliance that ball stop ball, zahlcovany in the rod with the possibility of free rotation about the bonnet, and the outer surface is the bottom of the cylinder of the clamping element with a small force, created a small axial preload spring, sharp edges of the elastic bushing, the cylindrical wall of the casing, cap, flange coupling element and the junction of the casing wall with its base and flange with coupling element rounded radii in feet of an object, which he put on vibration isolators, the specified length is screwed into the fingers, thecontinue locking nut, which when mounted object on vibration isolators enter the Central hole of the support sites of the flanges of the clamping elements and press the bearings with ball stop and the spring so that the legs are pressed against the frame flange coupling element, and vibrotherapy object in this position is fixed screws, for each cylinder, which has a washer and locking washer with unbendable mustache, and the length of the pin and the threaded part is chosen such that the selection of the length of the insertion of a finger could be provided to discharge the spring of each insulator took the full force of the weight of the object attributable to the vibration absorber, or only given her share.

2. Vibration absorber of high capacity and unloaded according to claim 1, characterized in that the elastic bushings are made sequential pressing of the workpiece in the radial and axial directions, and the degree of deformation of the workpiece at each of these OPE the Nations - phases pressing chosen so that the plane of coils of the main mass of coils in the volume of the sleeve is inclined to the vertical axis of the vibrator angles φ lying in the range of 45°≤φ≤α, where α is the angle equal to the half angle of the cone sleeve.

3. Vibration absorber of high capacity and unloaded according to claim 1 or 2, characterized in that it discharge spring made of woven three-lived.

4. Vibration absorber of high capacity and unloaded according to claim 3, characterized in that its bottom is fixed to the shock-proof cushion, custom axial pressing of the material-metal high-density

5. Vibration absorber of high capacity and unloaded according to claim 4, characterized in that it is made with a cylindrical elastic sleeves, and the tilt angles of the planes of the coils to the vertical axis of the sleeve from the main mass of coils of material sleeve little different from 45°.

6. Vibration absorber of high capacity and unloaded according to claim 5, characterized in that between the flange of the coupling element and the elastic sleeve and between the lid and the other elastic sleeve mounted remote spacers, centering on the wall of the housing, with a Central hole with a diameter equal to the diameter of the hole of the base body, and the sharp edges of the spacers rounded radii.

7. Vibration absorber of high capacity times the armed according to claim 6, characterized in that the cover is spring in the unloaded state of the vibration damper force generated by the axial tension unloading of a spring pressed directly to the bottom of the cylinder of the clamping element, and between the cover and the cylinder wall has a concentric gap slightly smaller or equal to the course of the insulator in the radial directions.

8. Vibration absorber of high capacity and unloaded according to claim 7, characterized in that the cover is spring centered on the cylinder wall of the clamping element and has the ability without jamming to move along the axis of the cylinder, and between the spring and the cylinder wall has a concentric gap slightly smaller or equal to the course of the insulator in the radial directions.



 

Same patents:

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry. Vibration isolator includes a housing with a flange, two elastic sleeves from wire material of metal rubber, which are arranged in it with radial and axial preload, a cover and fastening parts. In a central hole of sleeves and the cover there arranged is a tightening screw with threaded ends, in which there are holes for cotter pins. A cylindrical wall of the housing projects on both sides of its base to the height of the sleeve in free state. Specified value of axial preload of elastic sleeves is created by tightening of a lower slotted nut, under which elastic washers are installed. Sharp edges of parts are rounded with radii. Parameters of elastic sleeves are determined so that at simultaneous action of weight force of the object and the force allowable in operation and determined by dynamic overload, which are accounted for by the vibration isolator, dynamic loading processes of the vibration isolator cannot interfere with "tails" of its field of elastic hysteresis loops.

EFFECT: achieving increase in carrying capacity and service life of a vibration isolator.

3 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry. A vibration isolator includes a housing, two conical elastic sleeves arranged in it and made from wire material of metal rubber, a cover, a tightening element arranged in the central hole of sleeves and the cover and fastening parts. The housing is arranged inside a compression spring with a radial gap. The spring is supported from the housing flange and the vibration isolator bottom and rigidly fixed on them by means of covers composed of two semi-rings. A cylindrical wall of the housing projects on both sides of its conical base. The tightening element is made in the form of a hollow cylinder with a round conical flange. A flat supporting platform with central and threaded holes is made on outer surface of the flange. The tightening element is arranged in central holes of elastic sleeves. The conical cover is aligned on a smooth cylindrical part of the tightening element. An external support surface of the cover is flat. A round nut, under which elastic and lock washers are installed, is screwed on a threaded end of the tightening element. An unloading spiral compression spring with high flexibility is arranged inside the tightening element. A shock-proof cushion made from metal rubber material is fixed at the bottom of the tightening element.

EFFECT: improving vibration isolating properties and durability, and simplifying vibration isolator maintenance.

2 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: vibration isolator includes housing with flange for its attachment to support, elastic bushings made from wire material of metal rubber, central bushing and attachment parts. Central bushing is made in the form of hollow cylinder-buffer consisting of cylindrical and conical parts. Inside cylinder-buffer there located is one or two compression springs that, in non-loaded state of vibration isolator, press the buffer with low force to upper shock-proof pad built in the cover. Cover is fixed on housing with screws and nuts. Damping cassettes are installed on each other in housing. Each cassette consists of housing, cover put on housing, elastic hysteresis element made in the form of bushing and composed of individual sectors-pushers of ring with central conical hole. Cover and bottom of cassette housing serve as guides at radial working offsets of pushers. The second shock-proof pad is fixed at vibration isolator housing bottom. Spacer plate that presses cassettes to each other is installed between upper cassette and upper pad.

EFFECT: improving vibration isolating properties and durability, and simplifying vibration isolator maintenance.

6 cl, 10 dwg

Absorbing apparatus // 2473440

FIELD: transport.

SUBSTANCE: invention relates to friction absorbing units of freight car automatic couplers. Absorbing apparatus comprises barrel-like casing with boss on bottom inner side, pressure cone, two friction wedges with bearing plate, pairs of moving and fixed plates, all arranged in said casing symmetrically with its inner walls. Besides, absorbing apparatus comprises retaining-return device composed of a stack of polymer resilient elements arranged together with bearing plate and wedges between pressure cone and casing bottom and tightened up by bolt passed through central hole. Every said polymer resilient element represents variable-cross-section body of revolution with stepped hole along axis of revolution. Section with maximum OD is located between two different-size end of said body to divide outer lateral surface of the latter into two adjacent parts. Distance from said section to smaller end makes 0.30-0.55 of that to larger end.

EFFECT: absorption capacity increased for classes T2, T3.

8 cl, 8 dwg

Shock absorber // 2462629

FIELD: machine building.

SUBSTANCE: shock absorber comprises a shell for fixation to a base and an elastomer elastic element from two parts placed into a shell. The external surface of each part of the elastomer elastic element is formed with a cylindrical surface transferred from one side into a part of a toroid surface, and on the inner side - into a conical surface. Cylindrical grooves are evenly arranged on a conical surface of each part of an elastomer elastic element radially to an axis of a shock absorber. In the centre of each part of the elastomer elastic element at the side of the conical surface there is a bore in the form of a part of the inner toroid surface. In the central hole of the elastomer elastic element there is a bushing. The bushing is arranged with a ledge in the form of an orifice, with a cylindrical bore under an orifice and a vertical journal in the lower end of the bushing. The external and internal surfaces of the toroid part of the elastic element are equipped with circular ledges of a trapezoid profile. On the tops of external toroid surface there are circular planes formed for installation on the upper and lower sides of the orifice. In the lower elastic element at the side of the circular plane there is a hole. The shell is arranged of two parts in the form of sleeves in the form of truncated cones with central holes in each bottom of the sleeve. Parts of the shell are rigidly connected with each other along the end plane. Conical surfaces of elastic elements are inverted into the bottom of sleeves. One end of the bushing is taken out through a hole in the bottom of the first sleeve for connection to the equipment. The lower end of the bushing is inverted in the hole of the second sleeve. Elastic elements are installed between the orifice and the bottom of sleeves due to preliminary pressing.

EFFECT: increased permissible level of vibration and impact actions without increased dimensions of a shock absorber, increased reliability of a shock absorber and efficiency of vibration insulation.

8 dwg

Shock absorber // 2454578

FIELD: machine building.

SUBSTANCE: shock absorber includes sleeve located in the centre, holder for attachment of shock absorber to base and elastomeric elastic elements consisting of two parts and placed in holder. External surface of each part of elastomeric elastic element is formed with cylindrical surface which is continued on one side to part of toroidal surface, and on the other side - to conical surface. Cylindrical cavities are uniformly located on conical surface of each part of elastomeric elastic element. A bore in the form of part of toroidal surface is made in the centre of each part of elastomeric elastic element on the side of conical surface. Holder consists of two parts in the form of shells having the shape of flattened straight circular cones, with central holes at each bottom of the shell, which is counted as top of flattened cone, and edges of shells are counted as bases of cones rigidly attached to each other along their end plane. Washer is located on sleeve in middle part of shock absorber, to which external toroidal surfaces of parts of elastomeric elastic element are connected on both sides. One end of sleeve is taken out through a hole at the bottom of the first shell to be attached to equipment. The other end of sleeve is provided with thickened pivot and faces the hole of the second shell.

EFFECT: improving reliability of shock absorber and vibration insulation efficiency.

2 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: proposed method comprises jointing components to be protected to machine frame via standard rubber-metal bumpers. Every said bumper consists of two skew-located prismatic elastic elements inclined to component frame and bonded to top and bottom metal plates. In processing with variable operating conditions, inflexibility of bumpers is forcibly smoothly varied. For this, said top and bottom plates and elastic prismatic elements bond thereto are turned simultaneously through equal angle relative to protected component.

EFFECT: reduced vibration.

4 dwg, 2 tbl

Protecting device // 2410583

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly, to devices protecting objects from vibration and impact loads. The device consists of flexible elements, of an installed between them support element with an orifice, of a damping bushing positioned in the orifice of the support element, of a fixture element passing through orifices of flexible elements and of a damping bushing. A fastening bushing with flanges is arranged in the orifice of the support element between the fixture element, flexible elements and the damping bushing. Circular slots are made on surface of the fastening bushing facing the fixture element; additional damping bushings are installed in these circular slots. Value of tightening force for the fixture element is chosen by mathematic ratio.

EFFECT: increased efficiency of protection from effect of impact loads of high amplitude in cross direction.

3 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: damper consists of two flexible elements installed at angle to each other, fixed at base and support and kinematically interconnected with regulating element. The flexible elements are hinged by means of rotary axles and brackets. One brackets are fixed on plates of flexible elements, while others - on the base.

EFFECT: control over damper characteristics.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: vibration is damped by means of deformation of two rubber-metallic elements of cylinder or rectangular shape installed at angle one to another. During vibration damping a part of each of two rubber-metallic elements is subjected to stretching and shear deformation relative to rotation axis. Simultaneously, the second part of each out of two rubber-metallic elements is subjected to compression and shear deformation relative to the same axis of rotation. Percent of deformation of each of two parts of rubber-metallic elements grows in proportion to distance from rotation axis.

EFFECT: control over damper characteristics.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry. Vibration isolator includes a housing with a flange, two elastic sleeves from wire material of metal rubber, which are arranged in it with radial and axial preload, a cover and fastening parts. In a central hole of sleeves and the cover there arranged is a tightening screw with threaded ends, in which there are holes for cotter pins. A cylindrical wall of the housing projects on both sides of its base to the height of the sleeve in free state. Specified value of axial preload of elastic sleeves is created by tightening of a lower slotted nut, under which elastic washers are installed. Sharp edges of parts are rounded with radii. Parameters of elastic sleeves are determined so that at simultaneous action of weight force of the object and the force allowable in operation and determined by dynamic overload, which are accounted for by the vibration isolator, dynamic loading processes of the vibration isolator cannot interfere with "tails" of its field of elastic hysteresis loops.

EFFECT: achieving increase in carrying capacity and service life of a vibration isolator.

3 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry. A vibration isolator includes a housing, two conical elastic sleeves arranged in it and made from wire material of metal rubber, a cover, a tightening element arranged in the central hole of sleeves and the cover and fastening parts. The housing is arranged inside a compression spring with a radial gap. The spring is supported from the housing flange and the vibration isolator bottom and rigidly fixed on them by means of covers composed of two semi-rings. A cylindrical wall of the housing projects on both sides of its conical base. The tightening element is made in the form of a hollow cylinder with a round conical flange. A flat supporting platform with central and threaded holes is made on outer surface of the flange. The tightening element is arranged in central holes of elastic sleeves. The conical cover is aligned on a smooth cylindrical part of the tightening element. An external support surface of the cover is flat. A round nut, under which elastic and lock washers are installed, is screwed on a threaded end of the tightening element. An unloading spiral compression spring with high flexibility is arranged inside the tightening element. A shock-proof cushion made from metal rubber material is fixed at the bottom of the tightening element.

EFFECT: improving vibration isolating properties and durability, and simplifying vibration isolator maintenance.

2 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: vibration isolator includes housing with flange for its attachment to support, elastic bushings made from wire material of metal rubber, central bushing and attachment parts. Central bushing is made in the form of hollow cylinder-buffer consisting of cylindrical and conical parts. Inside cylinder-buffer there located is one or two compression springs that, in non-loaded state of vibration isolator, press the buffer with low force to upper shock-proof pad built in the cover. Cover is fixed on housing with screws and nuts. Damping cassettes are installed on each other in housing. Each cassette consists of housing, cover put on housing, elastic hysteresis element made in the form of bushing and composed of individual sectors-pushers of ring with central conical hole. Cover and bottom of cassette housing serve as guides at radial working offsets of pushers. The second shock-proof pad is fixed at vibration isolator housing bottom. Spacer plate that presses cassettes to each other is installed between upper cassette and upper pad.

EFFECT: improving vibration isolating properties and durability, and simplifying vibration isolator maintenance.

6 cl, 10 dwg

FIELD: machine building.

SUBSTANCE: device includes a base, and guide and shock-absorbing devices. A stock is rigidly fixed in the bottom of a cylindrical sleeve with formation of a tight annular cavity. Bottom of the cylindrical sleeve is fixed in the sleeve rigidly attached to the base of a protected object. A spring is located in the annular cavity and supported with its lower end face from the bottom and with its upper end from the piston. The piston is made in the form of a disk and located with a throttling gap relative to the stock. A cover plate that is movable relative to the stock is located in upper part of the stock. Cover plate consists of an annular flange with a seal and a sleeve rigidly attached to the flange and enveloping the outer surface of a cylindrical sleeve through the seal. Spring is located coaxially to the stock and its upper end face is supported from the cover plate and its lower end face is supported from the piston. A supporting element of the vibroisolated object is fixed on the cover plate. On the sleeve flange there rigidly fixed is an elastically damping device consisting of lower and upper support flanges of a plate type. Elastically damping element made from twisted wire of thread waste type is located between flanges. Upper threaded end of the stock is connected to a threaded hole in upper supporting flange. In the elastically damping device there is a through central hole for passage of the stock.

EFFECT: higher vibration isolation efficiency.

1 dwg

FIELD: construction.

SUBSTANCE: flexible structural connection element comprises a body made of twisted and compressed steel strands. The curve of deformation dependence on stress in a twisted and compressed steel strand has a slope inclined zone A and a steep inclined zone B, and the specified body is used on the section in the steep inclined zone: B of the specified curve. The connection element is used for placement between adjacent parts of the structure for transfer of vertical or horizontal loads. The building module comprises the specified connection element.

EFFECT: possibility to use a connection element under high static and dynamic loads.

15 cl, 9 dwg

Vibration isolator // 2445527

FIELD: machine building.

SUBSTANCE: proposed device comprises barrel accommodating packs of elastic elements sequentially fitted therein. Barrel is made form elastic polymer and feature cylindrical top part and truncated cone bottom. Said packs are made from discrete raw animal material, for example, linter-feather mix. Gaskets made from elastic dense raw animal material, for example, leather or felt, are arranged between aforesaid packs. Barrel top part is closed by cover from slightly-elastic polymer provided with central hole arranged coaxially with barrel lengthwise axis.

EFFECT: higher damping properties.

1 dwg

FIELD: machine building.

SUBSTANCE: conic equi-frequent element is made as two internal and external flexible rings axially symmetrically arranged in parallel planes. The rings are rigidly interconnected by means of two symmetrical elastic and diametrically arranged elements with a through central slot symmetrically made inside the element. Side surface of the slot are conjugated on ends with surfaces created with through orifices on external and internal rings. Surfaces making the equi-frequent element are conic. Cavities formed with the flexible rings and symmetrical elastic diametrically arranged elements are filled with an elastic damping net element.

EFFECT: raised efficiency of vibration isolation in resonance mode and simplification of design and assembly.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: disk equi-frequent element is made as two internal and external flexible rings axially and symmetrically arranged in parallel planes. The rings are rigidly interconnected by means of two symmetrical elastic and diametrically arranged elements with a through central slot symmetrically cut inside the element. The elements connecting internal and external rings have lines of curve and can be secured on the rings by welding, for example contact welding, of by means of fastening threaded elements or by glue connection. Cavities formed with internal and external rings are filled with damping net elements.

EFFECT: raised efficiency of vibration isolation in resonance mode and simplification of design and assembly.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: disk flexible element is made as two flat flexible internal and external rings coaxially arranged. The rings are positioned in parallel horizontal planes and are rigidly interconnected by means of two flexible elements. The flexible elements are radially arranged in horizontal plane at angle within ranges of 10°÷80° in vertical plane. Cavities formed with the flexible rings and flexible radially arranged elements are filled with an elastic damping net element.

EFFECT: raised efficiency of vibration isolation in resonance mode and simplification of design and assembly.

4 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: disk flexible element is made as two flat flexible internal and external rings coaxially arranged. The rings are positioned in parallel horizontal planes and are rigidly interconnected by means of two flexible elements. The flexible elements are radially arranged in horizontal plane at angle within ranges of 10°÷80° in vertical plane. Cavities formed with the flexible rings and flexible radially arranged elements are filled with an elastic damping net element.

EFFECT: raised efficiency of vibration isolation in resonance mode and simplification of design and assembly.

4 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: disk equi-frequent element is made as two internal and external flexible rings axially and symmetrically arranged in parallel planes. The rings are rigidly interconnected by means of two symmetrical elastic and diametrically arranged elements with a through central slot symmetrically cut inside the element. The elements connecting internal and external rings have lines of curve and can be secured on the rings by welding, for example contact welding, of by means of fastening threaded elements or by glue connection. Cavities formed with internal and external rings are filled with damping net elements.

EFFECT: raised efficiency of vibration isolation in resonance mode and simplification of design and assembly.

2 cl, 2 dwg

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