Hinge and lever vibration isolation system with rubber mesh damper

FIELD: machine building.

SUBSTANCE: vibration isolation system comprises a casing and vibration absorbers mounted on a base. The casing consists of horizontal levers with supporting plates fixed on them and resting against the vibration absorbers. The horizontal levers are pivotally connected with vertical rods that are pivotally connected with a horizontal platform. The vibration absorbers are mounted symmetrically to the horizontal platform where the equipment whose vibrations are to be damped is installed. The casing of vibration absorbers is made as packing washers with collars and threaded holes to fix the device whose vibrations are to be damped. Vibration absorbers comprise resilient rubber elements surrounded by screw cylindrical springs. Mesh resilient damping elements are installed inside the resilient rubber elements. A resilient damping element comprises coaxially set inner bushes and a central pin that have the same height. The bush being the closest to the periphery of the resilient damping element is made from cast polyurethane. The bush installed inside it is made from voluminous mesh interweaving and contacts with the central pin from cast polyurethane.

EFFECT: increased efficiency of vibration isolation in resonance mode.

2 dwg

 

The invention relates to mechanical engineering and can be used for vibration isolation of process equipment, including looms.

It is known the use of rubber elastic elements for vibration isolation of process equipment in the textile industry[1, 2, 3, 4]. Calculations show high efficiency rubber elastic elements in their relatively small dimensions, and tested in real factory conditions confirm their effectiveness with high reliability and ease of maintenance.

However, the load capacity of the rubber elements is low.

Known vibration absorber rubber [5], comprising a housing, which is made in the form of vertical rack with locking plates, one end of which is hinged to the bottom plate and into the top plate, mounted on a rubber elastic element in contact with vibroisolating object.

The disadvantage of this type of vibration isolators with the supporting rod is the relatively low resistance of the object horizontally, existing loads, and high efficiency in the same direction.

Known rubber vibration absorber with pendulum suspension [6], comprising a rubber elastic element that interacts with the housing base and pendulous dewlap, which is performed as a threaded rod, connected at one end with a support arm for mounting vibroisolating object, and the other with thrust washer and nut, and the housing base is made in the form of a box of rectangular cross section, consisting of upper and lower plates, sealed on three sides with lateral edges.

The disadvantage of this type of vibration isolators with pendulum suspension is their large dimension in height as they belong to the category of anti-vibration suspension systems, where the dimensions of the height is not limited, and for support systems of vibration protection requires a relatively small height.

Known rubber vibration absorber [7], comprising a housing and an elastic element made of elastomer, the body is made U-shaped in the form of two opposed spaced side flanges associated with the base having a shape congruent to the shape of the bearing surfaces of elastomer, consisting in the form of two opposed spaced elements, and in the upper part of the surface of the elastomer elements are connected by a plate with a fastening element of the object in the form of threaded holes, and the bottom base, and the lateral flanges of the housing are rigidly connected with one of the side surfaces of each of the elastomer element.

The disadvantage of this type of vibration isolators is their relatively low stiffness under loading in the planes, a pair�lennyh its base.

Known vibration absorber rubber for process equipment [8], comprising a housing and an elastic element made of elastomer, interacting with the object, the body is made in the form of supporting elements containing washers, bolts and nuts, located coaxially and opposite to the elastic element in its upper and lower part, made in the form of a sheath of elastomer, consisting of a flat mounting surfaces, which are mounted on the support member, and a cylindrical surface, located in the Central section relative to the perpendicular axes of the support elements, and conical surfaces, located between the mounting surfaces and the cylindrical surface and connected with them in a single shell.

The disadvantage of this isolator is its relatively low spatial rigidity with loading due to the lack of additional ribs in the shell.

Known vibration absorber rubber for process equipment [9], comprising a housing and an elastic element made of elastomer, interacting with the object, the body is made in the form of the base, which is attached to the cover, and vibroisolation equipment is installed on the bushing flange, the elastic element is an elastomer is located between the inner surface of the cover and the outer surface of the sleeve, � a Central opening and a flange, moreover, the conical shoulder of the elastic element covers the outer surface of the sleeve and in the lower part of the elastic element has a conical recess, the bottom base diameter equal to the diameter of the Central opening in the base, and the thickness of the elastomer layer above the recess and under the collar is 10%÷20% of the height of the elastic element.

A disadvantage of the known isolator is its relatively low rigidity of the shell elastomer.

Known rubber vibration absorber [10], comprising a housing and an elastic element made of elastomer, interacting with the object, the body is made in the form of a sleeve resting on the upper end of the elastic element, and a ring which connects through the peripheral recess of the housing base, and the profile of the side surfaces of the elastomer is made hyperbolic in the form of beams of equal resistance with constant stiffness in the axial and transverse directions.

A disadvantage of the known isolator is its relatively low rigidity, and therefore instability.

The closest technical solution to the claimed object is a rubber vibration absorber for process equipment according to the patent of Russian Federation №2279583 [11] (prototype), comprising a housing and an elastic element that interacts with the object, the body is made in the form of a lever m�charisma and consists of horizontal levers, one ends of which are rigidly connected with the lids resting on elastic elements, and the other by means of hinges connected to the vertical rods, which are in turn connected by means of hinges with a horizontal strap that comes with the manufacturing equipment.

The disadvantage of the prototype is the lack of efficiency on the resonance due to the lack of damping.

The technical result - improving the efficiency of vibration in the resonant mode.

This is achieved in that in the articulated-lever system with vibration isolation rubber-mesh damper, comprising a housing and a vibration isolators mounted on the base and comprising: an elastic rubber elements disposed symmetrically about a horizontal platform, which has vibroisolation technological equipment, and the outside elastic rubber elements, in parallel, symmetrically and coaxially to them, are cylindrical helical springs, and inside elastic rubber elements, in parallel, symmetrically and coaxially to them, are mesh elastic damping elements performing the function of a damping element of the vibration isolation system, the body is made in the form of an articulated lever mechanism and consists of horizontal arms attached thereto on�ornago plates based on vibration isolators, and the horizontal levers, by means of hinges, is connected with the vertical rods, which are in turn connected by means of hinges with a horizontal platform, and the elastic element of each isolator is made in the form of elastic damping element and a cylindrical helical spring body, which is made in the form of pressure washers with ribs and threaded holes for mounting vibroisolating object, and the elastic damping element is made of parallel installed and aligned and coaxially located with him inner sleeves, as well as a Central bar having the same height h, moreover, the ratio of outer diameter D of the elastic damping element height h is in the optimal interval of values of D/h=0,73 1,05....

Fig.1 shows a frontal section of the hinge-lever system with vibration isolation rubber-mesh damper, Fig.2 is an embodiment of a rubber-mesh damper.

Articulated lever system with vibration isolation rubber-mesh damper (Fig.1) comprises a housing and the vibration isolators mounted on the base 1 and includes: elastic rubber elements 13 and 15 are arranged symmetrically with respect to the horizontal platform 3, which has vibroisolation technological equipment 2. Outside elastic rubber �elements 13 and 15, in parallel, symmetrically and coaxially to them, are cylindrical helical springs 12 and 14. Inside elastic rubber elements 13 and 15, in parallel, symmetrically and coaxially to them, are mesh elastic damping bushing (items 16 & 17 performing the function of a damping element of the vibration isolation system.

The body is made in the form of an articulated lever mechanism and consists of a horizontal levers 10 and 11 are fixed to the supporting plates (not shown), based on vibration isolators. Horizontal levers 10 and 11 by means of hinges 6 and 7 are connected to vertical rods 8 and 9, which in turn by means of hinges 4 and 5 are connected with a horizontal platform 3.

The elastic element of each isolator can be performed (Fig.2, for example, the right vibration absorber shown in Fig.1) in the form of elastic damping element 13 and cylindrical helical springs 12, of the casing, which is made in the form of pressure washers 18 and 19 with the ribs and the threaded holes 20 for fixing vibroisolating object (not shown) and base. Pressure washers 18 and 19 are made with a spiral thread, which includes the coils of the spring element 12, pressed by a flat washer over the screws. The elastic element 13 is made of parallel installed and aligned and coaxially located with him HV�friction bushings 21 and 22, and Central core 23 having the same height h, and the ratio of outer diameter D of the elastic damping element 13 to its height h is in the optimal interval of values of D/h=0,73 1,05....

Bushing 21 that is closest to the peripheral portion of the elastic damping element 13 is made of elastic damping material, such as molded polyurethane. Inside the hub 21 mounted sleeve 22 made of a volumetric mesh weave, the inner surface which is in contact with the Central rod 23 which is mounted opposite the threaded holes 20 for fixing vibroisolating of the object and is made of elastic damping material, such as molded polyurethane.

The density of the mesh structure elastic mesh elements is made of a volumetric mesh weave, is in the optimal range of values of 1.2 g/cm3...2.0 g/cm3and the material elastic wire mesh elements - steel EI-708, and its diameter is optimum interval values 0,09 0,15 mm...mm.

The ratio of the average diameter Di of the spring element to the diameter of the wire d is in the optimal interval of values of D1/d=6,5 13,6.... The ratio of the outer diameter of the housing C height And is in the optimal interval of values of C/A=0,68...0,88.

Articulated lever system with vibration isolation rubbers�-mesh damper works as follows.

When vibrations vibroisolating object elastic damping element 13 receives the vertical load, thus weakening the dynamic effects on the overlapping buildings. Horizontal oscillations are damped due to the articulated lever mechanism of the body.

When vibrations vibroisolating object elastic damping element 13 and the springs 12 and 14 take both vertical and horizontal loads, thus weakening the dynamic impact on vibrotherapy object, i.e. provides spatial protection and impact protection. By varying the density of the mesh structure elastic damping element can be realized within certain limits, setting the resonant frequency of the isolator. This increases the efficiency of vibration in the resonant mode due to the integrated damping, which is due to the presence of bulk friction surfaces of the sleeves are made of a volumetric mesh weave, elastic damping material, such as molded polyurethane.

Elastic element mesh isolator is a universal shock-absorbing device that allows you to work both in a mode of the power isolation and kinematic, as well as in the vibro-impact mode.

Sources of information:

1. Kochetov O. S., Sazhin B. S. Reduction of noise and vibration� in production: theory, the calculation of the technical solution. Moscow: MGTU im. A. N. Kosygin, 2001. - 319 p. - PG.118, Fig.5.2; p. 119, Fig.5.4; p. 173, Fig.5.57; p. 175, Fig.5.59; p. 286, Fig.P.Y.8.

2. Kochetov O. S. Calculation of rubber vibration isolators for air jet looms, Izv. universities. Technology of textile industry. - 2000, №3. S. 77...83.

3. Kochetov O. S. Textile vibroacoustic. Textbook for high schools. Moscow: MGTU im. A. N. Kosygin, group "SOVAG Bevo" 2003. - 191 p - P.60, Fig.3.3; p. 61, Fig.3.4.

4. Kochetov O. S. Calculation of spatial systems of vibration protection. The magazine "Safety in industry", No. 8, 2009, pp. 32-37.

5. Kochetov O., M. O. Kochetova, Khodakov Etc., Cesternino V. A. anti-vibration rubber // Patent for the invention №2277652. Published 10.06.06. Bulletin of inventions No. 16.

6. Kochetov O., M. O. Kochetova, Khodakov Etc., Stareet M. E. Rubber vibration absorber with pendulum suspension // Patent for the invention №2279585. Published 10.07.06. Bulletin of inventions No. 19.

7. Kochetov O. S., M. O. Kochetova Rubber vibration absorber Kochetova // Patent for the invention №2301920. Published 27.06.07. Bulletin of inventions No. 18.

8. Kochetov O., M. O. Kochetova vibration absorber rubber for process equipment // Patent for the invention №2303720. Published 27.07.07. Bulletin of inventions No. 21.

9. Kochetov O., M. O. Kochetova vibration absorber process equipment // Patent Maisonette No. 2305806. Posted 10.09.07. Bulletin of inventions No. 25.

10. Kochetov O., M. O. Kochetova Rubber vibration absorber // Patent for the invention №2302566. Published 10.07.07. Bulletin of inventions No. 19.

11. Kochetov O., M. O. Kochetova, Khodakov Etc., Cesternino V. A. Rubber vibration absorber for process equipment // Patent for the invention №2279583. Published 10.07.06. Bulletin of inventions No. 19.

Articulated lever system with vibration isolation rubber-mesh damper, comprising a housing and a vibration isolators mounted on the base and comprising: an elastic rubber elements disposed symmetrically about a horizontal platform, which has vibroisolation technological equipment, and the outside elastic rubber elements in parallel symmetrically and coaxially them are cylindrical helical springs, and inside elastic rubber elements in parallel symmetrically and coaxially them are mesh elastic damping elements performing the function of a damping element of the vibration isolation system, wherein the housing is configured as a hinge-lever mechanism and consists of horizontal arms attached to their backing plates, based on vibration isolators, and the horizontal levers by means of hinges connected to the vertical rods, which � turn connected by means of hinges with a horizontal platform, characterized in that the elastic element of each isolator is made in the form of elastic damping element and a cylindrical helical spring body, which is made in the form of pressure washers with ribs and threaded holes for mounting vibroisolating of the object, and the elastic damping element is made of parallel installed and aligned and coaxially located with him inner sleeves, as well as a Central bar having the same height h, and the ratio of outer diameter D of the elastic damping element height h is in the optimal interval of values of D/h=0,73 1,05..., the bushing closest to the peripheral portion of the elastic damping element, made of elastic damping material, such as molded polyurethane, a sleeve mounted inside the sleeve is made of a volumetric mesh weave, the inner surface which is in contact with the Central rod mounted opposite threaded holes for mounting vibroisolating of the object and is made of elastic damping material, such as molded polyurethane, the density of the mesh structure elastic mesh elements is made of a volumetric mesh weave, is in the optimal range of values of 1.2 g/cm3...2.0 g/cm3and the material elastic wire mesh e�elements - brand steel EI-708, and its diameter is optimum interval values 0,09 0,15 mm...mm, and the ratio of the average diameter D1the spring element to the diameter of the wire d is in the optimal interval of values of D1/d=6,5 13,6..., and the ratio of the outer diameter of the casing With height And is in the optimal interval of values of C/A=0,68...0,88.



 

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EFFECT: increased efficiency of space vibration absorption and simplified design and installation.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: vibration absorber consists of a casing and a resilient element interacting with a unit. The casing is made as a base plate where two guiding sleeves with bottoms turned to the base plate are fixed by a layer of cast polyurethane. Cylindrical coil compression springs are located inside the guiding sleeves and symmetrical to their axes. The lower bearing surfaces of springs rest on round disks from antifriction material and the upper ones -on the cap covering the cast polyurethane layer with a gap. By means of a fastening element the cap is connected to a load bearing threaded element, for example, a bolt with its head being covered by a cast polyurethane layer. The sleeves on the side of the open part are fitted by ring flanged edges, coaxial to the sleeves' axes on which resilient rings are fixed with a gap in respect to the inner cap surface and serve as resilient limiters of moving elements of the vibration absorber. Resilient damping mesh elements are set under the disks of the guiding sleeves. Resilient damping elements are set under the disks of the guiding sleeves; they are made as pieces of off-grade rope of different diameter mixed up with the scraps of polyurethane products.

EFFECT: increased efficiency of space vibration absorption and simplified design and installation.

1 dwg

FIELD: machine building.

SUBSTANCE: proposed damper is composed of arch-like chain of articulated sections. Said sections feature wedge-like shape and are made of stiff material to adjoin each other in initial state. Sections are attached to each other to pivot about pins to make wedge-like gaps. Every section has recesses that make lengthwise grooves on damper outer surface to receive resiliently expandable links of extreme sections. Orthopedic device comprises support plate for foot, yoke to be splitted in two halves to grip the lower leg under knee joint, arch-like flexible dampers under flexure to connect support plate with yoke, collar elastically connected with elastic elements to grip the lower leg around ankle. Damping device comprises support for weight with edges secured to damper ends to make closed line of attachment points. Damper opposite ends thrust upon support surface to make a closed line of contact points on support surface.

EFFECT: directed flexure of damper resilient arc.

4 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: vibration isolator includes a housing with a cover plate, inside which an elastic element and a threaded pin are mounted. External thread is made on the housing and interacts with internal thread made on the cover plate. The elastic element is installed on an annular support mounted on a threaded end face of the housing. An external collar of the central sleeve interacts with an annular stop of the cover plate. An internal annular stop is made in the central sleeve and interacts from time to time with the annular stop made on the threaded pin. A washer interacting with the annular support on the threaded end face of the housing is fixed on the opposite end of the threaded pin.

EFFECT: reduction of amplitude of oscillations.

3 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

FIELD: mechanical engineering.

SUBSTANCE: vibration insulation system comprises base, pillars, flat springs, load-bearing units, and at least two flat springs from the sides of the loom. One of the ends of each spring is secured to the front bearing surface of the loom, and the other end is secured to the pillar mounted on the base. At least two bearing units are secured to the back bearing surface of the loom. Each of the bearing units has flexible member made of elastomer and roller mechanism for compensating rotational vibrations. The mechanism is made of bearing lid that cooperates with the top surface of the flexible member, cylindrical roller, and bearing plate provided with spherical groove.

EFFECT: enhanced reliability.

2 cl, 4 dwg

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