Unloaded low-frequency vibration isolator of large carrying capacity

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

 

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 450C).

Known vibration absorber (see Cats AS the Calculation provedeniya characteristics of vibration isolators of the material MP, 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 MP ("- 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 MP and creates a radial interference fit. Axially clamped in the sleeve of the MP 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. Its elastic liners and operate 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 MP not working 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 material MP// the dissertation 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 material MP, satisfying THE customer, and not opened their physical meaning (see below).

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 that she was drunk when creating it EfE is on tightness, 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 hysteresis loop of the vibration damper further will be "pushed out" to "tail" of the 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 becomes priyatnogo the 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 MP bushings in the process of elaboration did not require periodic peresasyvaniya slotted nuts and their spontania, with vibration absorber compared to the prototype would be the best UFH, and therefore, the dynamic system vibrotherapy object antivibrating" would have a lower resonant frequency and the object impacted me is isie 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 low-frequency vibration absorber WNBR large capacity, unloaded, comprising a housing, placed in it with axial and radial preload two tapered elastic sleeve of the wire material MP, the cover is placed in the Central hole of the sleeves and cap coupling element and a fastener, wherein the housing is located inside the compression spring with radial clearance, a little less than or equal to slightly less than or equal to the maximum deformation of the spring in the radial direction, the compression spring is made so that each reference plane is located at two reference coils, and the case rests flange at its upper bearing coils and rigidly attached to the outer supporting coil springs with caps, composed of two half-rings attached to the flange by bolts elastic washers and nuts, the other reference plane of the spring rests on the bottom of the insulator and fixed to it by means of a cover, also made of two half-rings, clamping the outer supporting coil springs to the bottom with screws with countersunk heads, the cylindrical wall of the housing acts on both sides of his konicek is the first base to the height of the sleeve in a free state, the clamping element is designed as a hollow cylinder with a circular conical flange with an outer diameter less than the internal diameter of the cylindrical housing wall to a slightly smaller double radial preload 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 conical enclosure base to a slightly smaller double radial preload of the elastic bushings, 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 its 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 coupling 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 big the ductility - 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 total deformation of the compression spring, which is suspended from the casing, and elastic sleeves when exposed to this force, the discharge 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, the lid rests on 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, and at the bottom with a radial preload on the bearing discharge of the spring is fixed shockproof cushion, made of a material MP density, higher density material elastic sleeves, and the size of the gap between the end of the round nut and shockproof cushion less progress in the axial direction of each of the springs in paws and vibroisolating 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 bearing of the spring so that the legs are pressed against the frame flange coupling element, and vibrotherapy object in this position is fixed by 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 this vibration absorber, or only given her share.

The implementation of caps in the form of two half-rings are necessary to ensure the Assembly of the proposed vibration damper.

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 for the loading of insulator 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 in the region of the SHL more deformation of these bushings under the action of only one constant force, as the center of the hysteresis loop under the action of a constant force 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 "tail", which greatly impairs 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 insulator even without considering the stiffness of the compression spring, in series with the elastic bushings included in the elastic system of insulator, but given the unloading stiffness of the spring, can be significantly smaller than the prototype, as in this case, you can use the elastic sleeve is made of a material MP lower density.

The follower is the second turning on the spring compression can significantly reduce its srednetehnicheskoy rigidity and, consequently, the lower its resonant frequency.

The presence shockproof cushion not only improves shockproof properties of the proposed insulator, but also allows you to extend downward applicable range of material densities MP elastic sleeves, and, consequently, downward, respectively, to expand the range of srednetehnicheskih the rigidity of the vibration damper.

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 therefore, increase resource use.

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 housing, the flange of the clamping 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.

Installing elastic Shay is 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.

In addition, it is proposed vibration absorber VBGR, characterized in that the Central holes of the upper and lower elastic sleeves output to the conical base of the case is made conical part with a large cone diameter slightly larger diameter Central hole in the conical base of the case, and on the upper outer surface of the upper sleeve is made conical part with a smaller cone diameter slightly smaller outer diameter of the conical flange of the clamping element and the lower elastic sleeve at its lower outer surface of the conical portion with a smaller cone diameter slightly smaller outer diameter of the conical cover, and height of these tapered portions is approximately equal to the sum allowable deformation and axial tension in each of the elastic sleeves.

The presence of these tapered parts of the elastic bushings will prevent extrusion of material in their working clearances between the casing and the conical flange of the clamping element, a housing and a conical cap, conical base body and the clamping element.

Construction of the proposed vibration isolators are illustrated by the figures on which the mounting insulator to the object and the base shows how "the situation" on sboros the second drawing thin solid line.

1 shows a longitudinal section of insulator VBGR.

Figure 2 shows a top view of the vibration damper.

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

Figure 4 shows a fragment of insulator VBGR with elastic sleeves with tapered parts, preventing extrusion of the material of the elastic bushings in the working gap of the insulator.

Figure 5 shows the field progesterone loops of insulator.

We offer low-frequency vibration absorber WNBR low-frequency, large-capacity, unloaded (see figure 1 and 2) contains a compression spring 1, and placed inside radial clearance 2, slightly less than or equal to the maximum deformation of the spring 1 in the radial direction, the housing 3. The compression spring 1 is made so that each reference plane is located at two reference coils 4. Case 3 is based flange 5 at its upper bearing coils 4 and is rigidly attached to the outer support round 4 spring 1 with the cover 6, is composed of two half-rings attached to the flange 5 by bolts 7, the elastic washers 8 and nuts 9. Another reference plane spring 1 rests on the bottom of insulator 10 and fixed to it by means of a cover 11, is also composed of two half-rings (see figure 2), preimium the second outer anchor round 4 spring 1 (see 1) to the bottom 10 by means of screws 12 with countersunk heads. In case 3 is posted with axial and radial preload two tapered elastic sleeve 13 of the wire material MP, made by cold pressing in the direction of the axis of the sleeve, the tapered cap 14, the clamping element 15, unloading coiled compression spring 16 and the cover 17 of the discharge spring.

Cylindrical wall 18 of the housing 3 is on both sides of its conical base 19 at the height of the sleeve 13 in a free state.

The clamping member 15 is in the form of a hollow cylinder 20 with a circular conical flange 21 with an outer diameter less than the inner diameter of cylindrical wall 18 of the housing 3 to a slightly smaller double radial preload of the elastic bushings 13 and on the outer surface of the flange 21 is planar support platform 22 with a Central hole 23 and one, two or more screw holes 24 (see Fig 1 and 2).

Coupling element 15 (see figure 1) placed in the Central hole of the elastic bushing 13 with a given radial tension. The diameter of the inner bore 25 of the conical base 19 of the housing 3 to a slightly smaller double radial preload of the elastic bushings 13, bigger than the exterior diameter of the smooth cylindrical part 26 of the clamping element 15. Tapered cap 14 is centered on the smooth cylindrical part 26 stenolaemata 15 and its outer bearing surface 27 is planar. The outer diameter of the cover 14 is equal to the outer diameter of the conical flange 21 of the clamping element 15. The desired axial preload of the elastic bushing 13 by tightening all the nuts 28, which screw onto the threaded end of the clamping element 15, and which has one, two or more resilient washers 29, and locking washer 30, one condition of which is bent into the groove of the nut 28, and the other in the groove of the clamping element 15.

Unloading coiled compression spring 16 with a small axial tension placed inside the coupling element 15 and is made 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 total deformation of the elastic compression of the bushings 13 and the spring 1 when exposed to this force. The spring 16 on all the threads fastened to the pole 31, performed on day 10. On top of the spring 16 also on all the threads screwed the lid 17, the outer diameter of which is two moves of the insulator in the radial direction smaller than the diameter of the inner bore 32 of the cylinder 20 of the clamping element 15, in which is placed a spring. The spring 16 and the cover 17 from unscrewing thecontrary matumi 33 on the wall of the support 31 and the skirt of the cap 17.

Sharp edges of the elastic bushings 13, the cylindrical wall 18 of the housing 3, the cover 14, the conical flange 21 of the clamping element 15, as well as the places with the unity wall 18 of the housing 3 with its base 19 and the conical flange 21 with the coupling element 15 rounded radii.

On day 10 with a radial preload on the bearing 31 of the discharge spring 16 is fixed shockproof cushion 34, made of a material MP density, higher density of the material of the elastic bushings 13 and the size of the gap 35 between the end of the round nuts 28 and shockproof cushion 34 is less than the stroke in the axial direction of each of the springs 1 and 16.

In the tabs 36 vibroisolating object 37 (see figure 3), which he put on vibration isolators, the specified length is screwed into the fingers 38, thecontinue locking nut 39, which when mounted object 37 on vibration isolators enter the Central hole 23 of the support pads 22 of the flanges 21 of the clamping elements 15 and press the cover 17 and the discharge of the spring 16 so that the legs 36 are pressed against the frame 22 of the flange 21 of the clamping element 15. Vibrotherapy object 37 in this position is fixed by screws 40. Under each head screws 40 are installed spring washer 41 and the locking washer 42 with unbendable mustache. The length of the finger 38 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 16 of each insulator took the full force of the weight of the object 37 per this vibration absorber, or only given her share. Vibration absorber screws 43, under the heads of which also have elastic washer 44 and locking washers 45, fixed on the base 46.

Locking washer 42 and 45, depending on operating conditions vibration isolators may not be installed.

In addition, it is proposed vibration absorber VBGR (see figure 4), characterized in that the Central holes of the top 47 and bottom 48 of the elastic bushings output to the conical base 19 of the housing 3 is made conical portion 49 with a large cone diameter slightly larger diameter Central hole 25 in the conical base 19. On the upper outer surface 50 of the upper sleeve 47 is made conical part 51 with a smaller cone diameter slightly smaller outer diameter of the conical flange 21 of the clamping element 15, and the bottom of the elastic sleeve 48 on its lower outer surface 52 is made conical portion 53 with a smaller cone diameter slightly smaller outer diameter is tapered cap 14, and the height of these tapered portions is approximately equal to the amount of allowable deformation and axial tension in each of the elastic sleeves.

The Assembly proposed insulator is produced as follows.

In case 3 (see figure 1) establish an elastic sleeve 13. To install the coupling element 15 and the radial tension in the sleeve 13 is used technological intake cone (Fig. not shown). Smaller diameter chamfer less than the diameter of the Central hole of the sleeve 13 in a free state is AI, and greater equal to or slightly larger than the diameter of the smooth portion of the cylinder 20 of the clamping element 15. With a given radial tensioning insert coupling element 15 (with intake cone) in the center hole of the elastic bushing 13 to the stop flange 21 of the elastic sleeve 13 and clean technological intake cone. Consistently wear on the coupling element 15 of the cover 14, one, two or more resilient washers 29 and locking washer 30, screw round nut 28, tighten it until a specified axial tension in the elastic bushing 13, which is controlled by the dimension between the outer end with a round nut 28 and a flat reference area 22 of the flange 21. Then) round nut 28. The spring 16 is screwed into the support 31 of the bottom 10 and the screw cap 17. The spring 16 and the cover 17) matumi 33 wall support 31 and the skirt of the cap 17. Fix the compression spring 1 on day 10 using semirings cover 11 and screws 12, which are from unscrewing) the paint so that the paint does not interfere with accurate installation of insulator in the workplace. Set the frame 3 are collected in it the details of the cover 17 and the spring 1 and fixed on the spring 1 using semirings cover 6, the bolts 7, the elastic washers 8 and nuts 9. The cover 17 of the spring 16 will be with a small force pressed to the bottom of the hollow cylinder 22 of the clamping element 15.

In the workplace the vibration isolators VBGR (see IG) fixed to the base 46 by screws 43 with spring washers 44 and locking washers 45. In the tabs 36 vibroisolating object 37 to the specified length is screwed fingers 38) and their nuts 39. Set the object 37 on vibration isolators, with the tabs 36 are mounted on a platform 22 of the vibration isolators. Fix object 37 on shock absorbers screws 40, the elastic washers 41 and locking washers 42.

Loaded with any of insulator WNBR its elastic bushings are bilateral upregulating another 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 in figure 5 thick solid line. The parameters of the proposed vibration isolators WNBR are chosen so that under the action of dynamic loads less than or equal to a valid, working loop 54 (see figure 5) were without "tails" 55 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 13 and prog the us 1. In this case, the proposed vibration isolators WNBR 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. Consequently, the greater will be the life of the vibration isolators.

At small shear radial displacements of the spring 16, for which there is no mutual slippage of the finger 38 relative to the cover 17, the shear stiffness of the unloading of the spring 16 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 is possible to accept 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 16 in radial directions.

The proposed vibration isolators WNBR work in all kinds of dynamic loads acting 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 is m upregulating element) five times larger 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 38 on different length in feet 36 of the elastic sleeve 13 and the spring 1 vibration isolators VBGR can be unloaded from the action of these components.

1. Vibration absorber of low-frequency large-capacity unloaded, comprising a housing, placed in it with axial and radial preload two tapered elastic sleeve of the wire material-metal, cap, placed in the Central hole of the sleeves and cap coupling element and a fastener, wherein the housing is located inside the compression spring with radial clearance, a little less than or equal to the maximum deformation of the spring in the radial direction, the compression spring is made so that each reference plane is apologee two reference coils, and the case rests a flange at its upper bearing coils and rigidly attached to the outer supporting coil springs with caps, composed of two half-rings attached to the flange bolts, elastic washers and nuts, the other reference plane of the spring rests on the bottom of the insulator and fixed to it by means of a cover, also made of two half-rings, clamping the outer supporting coil springs to the bottom with screws with countersunk heads, the cylindrical wall of the housing acts on both sides of its conical base to the height of the sleeve in a free state, the clamping element is designed as a hollow cylinder with round the conical flange with an outer diameter less than the internal diameter of the cylindrical housing wall to a slightly smaller double radial preload elastic sleeves, and on the outer surface of the flange is planar support platform with a Central hole and one or 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 enclosure base to a slightly smaller double radial preload of the elastic bushings, larger than the diameter of the smooth cylindrical portion of the clamping element, a conical cover price is trebuetsya on the smooth cylindrical portion of the clamping element, and its 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 coupling element and which has one or 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 great give - for example, its deformation under the action of the weight force G vibroisolating object falling on vibration absorber in 5-10 times more likely to exceed the total deformation of the compression spring, which is suspended from the casing, and elastic sleeves when exposed to this force, the discharge 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, the lid rests on the bottom of the cylinder of the clamping element with a small force, created a small axial on agom springs, 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 coupling element rounded radii, and at the bottom with a radial preload on the bearing discharge of the spring is fixed shockproof cushion, made from a material-metal with a density greater than density of the material of the elastic sleeves, and the size of the gap between the end of the round nut and shockproof cushion less progress in the axial direction of each of the springs in the legs vibroisolating object, which he put on vibration isolators, the specified length is screwed into the fingers, thecontinue locking nut are you installing object on vibration isolators enter the Central hole of the support sites of the flanges of the clamping elements and press the bearing of the spring so that the legs are pressed against the frame flange coupling element, and vibrotherapy object in this position is fixed by 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 an object falling on vibro olator, or just given her share.

2. Vibration absorber of low-frequency large-capacity unloaded according to claim 1, characterized in that the Central holes of the upper and lower elastic sleeves output to the conical base of the case is made conical part with a large cone diameter slightly larger diameter Central hole in the conical base of the case, and on the upper outer surface of the upper sleeve is made conical part with a smaller cone diameter slightly smaller outer diameter of the conical flange of the clamping element and the lower elastic sleeve at its lower outer surface of the conical portion with a smaller cone diameter slightly smaller outer diameter of the conical cover, and height of these tapered portions is approximately equal to the amount of allowable deformation and axial tension in each of the elastic bushings.



 

Same patents:

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

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FIELD: machine building.

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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 is related to machine building and may be used for vibration insulation of process equipment. Vibration isolator comprises body and elastic element from elastomer that interacts with object. Body is arranged in the form of upper conical cover and conical base, between which elastic element is installed. Elastic element is made of two symmetrical parts of conical shape: upper and lower, which are connected to each other by their surfaces having larger diametre, by means of elastic tape stitched with elastic thread. Opposite surfaces of elastic element are connected to fixing studs. Studs are installed coaxially and axisymmetrically to parts of elastic element of conical shape. Studs with their cylindrical part enter opening of elastic element, and collar is used with nut to pull it to conical base or cover.

EFFECT: increased efficiency of vibration insulation in resonant mode and simplification of design and installation.

2 cl, 1 dwg

FIELD: mechanics.

SUBSTANCE: proposed support comprises upper base made from solid material, for example aluminium. Lower base is made from low-elasticity rubber. Flexible elements furnished with holes are made from high-elasticity rubber. The support mating surfaces are rigidly interconnected. The aforesaid holes are arranged staggered on the support cross section.

EFFECT: reduced vibration caused by running rotor machines and devices, higher antivibration properties of support.

2 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 1080 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 1080 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

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

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

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