SU1357619A1 - Vibration isolator - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mechanical engineering, namely, vibration isolators, intended for vibration protection of optical, metrological, navigation, etc. devices. The aim of the Zff shadow image is to increase the effectiveness of vibration isolation at low frequencies over a wide range of perceived loads due to a change in the stiffness of the elastic element simultaneously with a change in the load on the base plate. Pistons 12, placed in radial holes 13, made in the side walls of housing 1, with rods 14 act through clamping strips 15 on annular elastic element 10, which changes its rigidity depending on the load on the vibration isolator. 2 Il. (L (pus.l

Description

The invention concerns engineering, in particular, vibration isolators designed for vibration protection of optical, metrological, navigation, and other environmental devices.

The purpose of the invention is to increase the efficiency of vibration isolation at low frequencies in widths: the range of perceived loads due to the change in the stiffness of the elastic element along with the change of the load on the base plate.

In Fig. 1, the vibroieol torz isobrshken a longitudinal section; figure 2 is a section in figure 1 about

The vibration isolator includes a housing 1, which forms a damping chamber 3 with the lid 2, Support plate 4- with a lid 5 and a flexible diaphragm 6 forms a working chamber 7. The connection of the lids 2 and 5, respectively, with the housing 1 and the base plate 4 is hermetic. The flexible diaphragm 6 is tightly attached by iipi-shim rings 8 to the housing 1, the base plate 4 and the lid 5. The damping hole 9s connecting the damping chamber 3 to the working chamber 7 is completed in the upper wall of the housing 1 and the pressure ring 8,

In the annular gap between the housing 1 and the base plate 4 is an annular elastic element made in

The form of a rubber torus 10 filled with compressed air through a valve 11. Two radial holes are made in the side walls of the housing 1, each of which has a piston 12 seconds tight with a ring 13, the piston 12 is equipped with a rod 14 connected to a pin bar 15} acting on the elastic element 10.

The automatic level plate of the base plate 4 contains a pusher 16 with a sealing ring 17, an inlet 18 and an outboard 19 flaps, installed with CAPACITY axial movement on the pusher 1b and pressed by the spring 20 to the shoulder 21 of the pusher 16 and the nut 22, the surfaces of the flaps 18 and 19 rubber-coated and in contact with the inlet 23 and with the nozzle-24 nozzles directed towards each other. The inlet nozzle 23 communicates with a source of satan gas via a nozzle 255 and nozzle 24 communicates with the atmosphere.

The foundation bolt 26 serves to fasten the vibration isolator to the supporting part of the vibration-proof object 27.

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Vibration isolator works as follows.

Compressed air is fed through the fitting 25, the inlet nozzle 23 into the damping chamber 3 and through the defrosting hole 9 into the working chamber 7. As a result of an increase in pressure in the damping chamber 3, the pressure on the pistons 12, which through the rods 14 and clamp bars 15 they deform the torus 10-pressing it to the walls of the support plate 4. When the pressure in the working chamber 7 is increased, the support plate 4 pusk jets j pulls up the pusher 16 for strengthening it, up to the neutral level (FIG. 1) 5 corresponding to the full overlap flap 1B and 19 inlet 23 and exhaust Nogo nozzle 24 ,. The mass of the supporting part of the vibrating object being molded 27 is balanced by the air pressure in the working chamber 7 The pressure in the damper chamber 3 acting on the pistons 12 is balanced by the force of elastic deformation of the torus 10.

When the weight of the supporting part of the vibration-insulating object 27 varies, the load on the foundation bolt 26 changes.

As the load increases, the support plate 4 sags. With it, the pusher 165 lowers with its shoulder 21 and lowers the flap 18. The output nozzle 24 remains blocked by the flap 19 under the action of the spring 20. Compressed air through the nozzle 25 and the open inlet nozzle 23 enters the damping chamber 3 and through the damping hole 9 into the working chamber 7. As a result of the increase in pressure in the damper chamber 3, the pressure also increases on the pistons 12, which through the rods 14 and clamping strips 15 further deflect the torus 10, thereby increasing its weight By increasing the pressure in the working chamber 7, the support plate 4, together with the vibration-insulating object, rises to a neutral level, corresponding to the complete overlap of the inlet 23 and outlet 24 nozzles with the appropriate dampers.

When the load decreases under the action of overpressure in the working chamber 7, the support plate 4 with the vibration-insulating & 1 object rises relative to the neutral level. Together with the baseplate, the pusher AND mounted on it rises.

which the

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the nut 22 raises the damper 19 The inlet nozzle 23 remains blocked by the action of the spring 20 by the damper 18. Compressed air from the working chamber 7 through the damping hole 9, the damping chamber 3 and the open exhaust nozzle 24 enters the atmosphere, resulting in a decrease in pressure in working 7 and In this case, in the damper chamber 3, the support plate 4, together with the vibroelectric M, the object is lowered to a neutral level, corresponding to the complete overlap of the inlet 23 and outlet 24 nozzles, and the pressure of the slider 15 on the torus 10 decreases, reducing it samtsu its rigidity.

When exposed to the external BoatPiKia, due to spatial vibration, additional loads arise, generally directed at a certain angle to the base plate 4,

The vertical components of the vibrations are perceived by a pneumatic suspension comprising a working chamber 7, connected by a damping hole 9 with a demoulding chamber 3, and a flexible diaphragm 6. Due to the low rigidity of the pneumatic suspension, vertical composites of vibration are effectively attenuated.

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The horizontal vibration components are transmitted to the torus 10. The pistons 12 change the stiffness of the vibration isolator in a horizontal direction depending on the load, which effectively attenuates the horizontal components of vibration.

Claims (1)

Invention Formula Vibration isolator, comprising a housing with a damper chamber, a base plate in the form of a glass, connected to it and an outer surface of the housing; a flexible diaphragm forming a working chamber with them, connected to the damper chamber by automatically adjusting the level of the base plate and an annular elastic element Located in the side walls of the casing of the base plate, this is due to the fact that, in order to monitor the effectiveness of vibration isolation at low frequencies in a wide range of the response iae, in the side wall orpusa provided with radial holes, and vibration isolation torus ci-abzhen been set for m in the last piston -n. with stock-: and connected to the pr1 ;; nm strip for interaction with annular and elastic elements. GO 15 Editor M.Blanar phage. g Compiled by V.Anopov Tehred MoHodanich Order 5980/33 Circulation 804 Subscription Higher educational institution of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 1b Production and printing company, Proofreader AL 1pin