Vibration isolator

FIELD: machine building.

SUBSTANCE: vibration isolator has two support crossbars and set of resilient ring springs with shoulders. Ring springs with shoulders are made out of pressed wire, and are secured with each other by securing elements in pairs, and are arranged diametrically at opposite surfaces with angular displacement. The support crossbars are made as rotation bodies with two sockolets, in one sockolet thread holes are made to secure to the base and protected object, in the another sockolet helical slots are made to screw-in the screw metal spring. The spring is installed inside a set of ring springs.

EFFECT: exclusion of resonances in work range of frequencies of the mechanical system, stability of elastic and dampening properties of the vibration isolator.

5 dwg

 

The invention relates to the field of vibration isolation of machinery, in particular to elastic damping devices, and can be used in aerospace, as well as in any other field technique for reducing the vibration of the devices, assemblies and equipment.

Known annular spring containing an elastic ring with protrusions, in pairs and diametrically disposed on opposite surfaces with displacement on their corner, and this spring is provided with either an annular element, rigidly connected with the protrusions of one of the sides of the elastic ring, or provided with an additional elastic ring, similar to the main one, the protrusions of the rings facing each other and rigidly interconnected, the additional width of the elastic ring is equal to the width of the main (patent RF №1208368, Appl. 23.12.83, publ. 30.01.86, bull. No. 4).

The disadvantage of analog is unequal stiffness in three mutually perpendicular directions of loading, which may cause additional resonant modes in the operating range of the protected object.

The closest in technical essence to the claimed is a vibration absorber consisting of elastic damping element ring type of material MP, with two diametrically opposite sides of which set of mounting clips that are used to install FWS�insulator on a vibrating base and accession to the protected object, and inside circumferential reinforcing element has a pack of corrugated plates (patent RF №986556, Appl. 06.07.81, publ. 07.01.83).

The disadvantage of the prototype is the low adhesion of reinforcing plate pack with the surrounding array pressovannoe wire material MP. In addition, adjacent to the fins on the side surface of the reinforcement package, the array of material MP receives large plastic deformation, and wire pererabotka on its sharp edges.

The technical result, which directed the creation of the present invention is to provide a high reliability protection, to eliminate resonances in the working space of the frequencies of the mechanical system, as well as ensuring a high level of elastic damping and stability properties of the isolator. Ensuring high reliability of the annular elastic element and improved damping characteristics are expected to be achieved through the creation of additional efforts from coil springs to relieve pressure vibration absorber from the static force of the weight of the protected goods (unit, unit).

The technical result is achieved in that the isolator containing two support cross members, serving for the attachment of the mounts to the base and kamishima object and a set of resilient annular spring with the tabs, in pairs and diametrically disposed on opposite surfaces with displacement on their corner of the ring spring with protrusions made of pressovannogo wire material and fastened together by the fastening elements of the support yoke is in the form of bodies of rotation with the two bosses along the axis, one with threaded holes for mounting to the base and securable object, the other is screw grooves for screwing a helical metal spring installed inside of a set of ring springs.

The invention is illustrated by drawings, where

- Fig. 1 is a perspective view of the isolator in the isometric;

- Fig. 2 shows a side view;

- Fig. 3 shows a top view;

- Fig. 4 shows the clip in the isometric;

- Fig. 5 shows the structure of a special nut that serves to bond the stepped ring springs from pressovannogo wire material.

The design of the isolator is a set of curly elastic rings 1 (Fig. 1, 2), made of pressovannogo wire material. Spring 1 represent a ring with the tabs 2, arranged in pairs on opposite surfaces are offset in a corner, for example, 60 degrees to each other. In the General case, the angle offset�tion depends on the number of projections and can be calculated by the formula

α=πn,

where n=2, 3, 4, 5, ...

The ring 1 is provided with holes 3 with an offset angle α/2, in which one side is molded mounting nut 4. Inside the rings 1 to discharge installed additional metal coil spring 5, screwed in the screw grooves 6 disposed in the bosses 7 of the cage 8. Clips 8 is a body of rotation in the form of a three-beam crosses with the two bosses 7 and 9 (Fig. 3, 4) along the axis of the isolator. Boss 7 serve to link the clips and unloading of the isolator from the weight force of the protected object. Lugs 9 are used to fasten it to the base and securable. When assembling the isolator spring 5 is subjected to some compressive force corresponding to part of the weight force of the object per one vibration absorber. In this state, the vibration absorber is collected in a single unit.

To prevent from turning during Assembly of the elastic elements on the outer lateral surface of the nut 4 is provided with knurling (see Fig. 5). In addition, nuts can be glued to the inner surface of the elastic elements 1 glue to prevent from turning during Assembly. Nut 4 can also be performed with two threads on the inner and outer cylindrical inner and outer side�fir surfaces, one of them must have left and the second right-hand thread (Fig. 5).

The operation of the isolator is as follows. The action of the vertical load of the vibration or shock of nature, applied to the boss 9 from the side of the protected object, leads to the deformation of the elastic element 5 and a set of elastic rings 1, compensating for the action of applied loads and desipere (dissipating) the energy due to the slipping of the wires in the elastic elements, and in the spring 5 during its deformation. Axial loading of the elastic ring 1 represent the efforts of each other and are subjected to bending and torsion. The terms of all the elastic deformation of the rings is the same. Resistance isolator is provided by mounting elastic rings 1 to each other, the supporting crosspieces 8 and the spiral spring 5, and also due to the optimal ratio between the outer and inner diameters of the elastic rings, the height of the projections, density pressovannogo wire material.

The possibility of implementation of the present invention is provided in that all of its elements can be manufactured from known materials and standard equipment.

Analysis conducted by the applicant of the prior art, including searching by the patent and scientific and technical information sources, identifying sources containing information about similar inventions, has allowed to establish that the applicant has not found an analogue, characterized by features identical to all the essential features of the claimed utility model. Therefore, the claimed invention meets the criterion of "novelty."

To verify compliance of the claimed invention, the condition of "inventive step", the applicant conducted an additional search of the known solutions to identify signs that match the distinctive features of the prototype features of the claimed in the invention.

The search results showed that the claimed invention not apparent to the expert explicitly from the prior art defined by the applicant, not identified impact provided the essential features of the claimed invention transformations to achieve a technical result.

Therefore, the claimed invention "vibration absorber" meets the criterion of "inventive step".

The present invention may be used in transport machine building, light industry, and other branches of engineering. A theoretical study conducted by the authors showed that vibration absorber capable of providing a predetermined level of stability of characteristics, and the overall design is able to maintain these characteristics in the same condition � the process. This proves the achievement perceived by the applicant of the technical result - ensuring high reliability-protection and receipt ravnoznachnosti linear characteristics along three mutually perpendicular directions, to eliminate sub - and superharmonic resonances in the working space of the frequencies of the vibration isolation system.

Vibration absorber containing two support cross members, serving for the attachment of the mounts to the base and to the protected object, and a set of resilient annular spring with the tabs, in pairs and diametrically disposed on opposite surfaces offset their angle, characterized in that the annular spring with protrusions made of pressovannogo wire material and fastened together by the fastening elements of the support yoke is in the form of bodies of rotation with the two bosses along the axis, one with threaded holes for mounting to the base and securable object, the other is screw grooves for screwing a helical metal spring, installed inside of a set of ring springs.



 

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Shock absorber // 2547736

FIELD: machine building.

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FIELD: machine building.

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EFFECT: vibration insulation efficiency improvement.

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FIELD: machine building.

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EFFECT: higher vibration isolation efficiency.

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FIELD: machine building.

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EFFECT: higher vibration isolation efficiency.

1 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Vibration isolator comprises flat resilient and friction damping elements. Flat resilient elements are made as a package of arc-type resilient elements consisting of flat springs alternating in mutually perpendicular directions and resting against a base. Every flat spring consists of a horizontal flange and two lateral flanges bent by 135° to the horizontal flange and provided with thrust sections at the ends. The damping element is a compound one and consists of a friction part and an elastic part. The friction part is made as bushes with flanges at the ends and a section of a rope wound on the bushes in a closed loop. The bushes are coupled with the resilient elements by rivets. The elastic part is made as an elastodamping ring embracing the rope section from outside.

EFFECT: higher vibration isolation efficiency.

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FIELD: machine building.

SUBSTANCE: invention relates to machine building. A disk-shaped resilient element comprises a body in which a resilient element is installed. The lower body part consists of a base made as a disk with annular inner groove. The lower ring of the resilient element is set in the disk groove. The upper body part is made as a cover being a disk with a central annular notch. The cover is rigidly connected with the upper ring of the resilient element by screws. A layer of vibration damping material from polyurethane is arranged in the central annular notch of the cover, and a mounting plate to hold the unit whose vibrations are to be isolated is fixed on the said layer.

EFFECT: increased efficiency of vibration isolation in resonance mode.

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FIELD: machine building.

SUBSTANCE: vibration isolator comprises a circular mounting flange (1), a pair of cone-shaped resilient damping elements (2), bushes with dish flanges (3, 4), a stud (5) with threaded ends. The resilient damping elements are made from a coil (6) wound from springy metal wire with turn pitch being equal to the coil diameter, and pressed into a cone shape. The coil is made from a pair of interconnected links with different diameters of springy wire which are wound in coils of different diameter, and is laid with tension crosswise. The link with greater coil diameter is laid over the link with smaller diameter. The method to produce such a vibration isolator includes the following operations. Both coils are stretched up to the turn pitch equal to the diameter of the respective coil. The coil of smaller diameter is wound onto a mandrel, then the coil of greater diameter is wound over it crosswise to form a resilient barrel-like element with further moulding into a cone-shaped resilient damping element. The bigger and the smaller bases of the resilient damping elements are fixed to respectively the mounting circular flange and the inner surfaces of dish flanges which have been treated by sand, with the help of sound glue joint with pressing by the stud. The cone-shaped resilient damping elements are impregnated by lubricating mixture.

EFFECT: higher reliability, longer life of a vibration isolator, protection against vibration in cross directions.

2 cl, 6 dwg

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