SU838172A1 - Vibration-insulating hydrostatic support - Google Patents

Description

(54) VIBRATION ISOLATING HYDROSTATIC SUPPORT

one

This invention relates to vibro; It can be used to isolate objects from the harmful effects of vibrations and shocks.

Closest to the invention is a vibroisolating hydrostatic bearing, comprising a housing, in the bottom of which a throttling device is installed, and a plunger l coaxially located in it with a radial clearance.

A disadvantage of the known support is the inability to adjust the damping characteristics depending on the weight of the object, as well as the limitation of the amplitude of oscillation of the plunger.

The purpose of the invention is to improve the vibration-insulating properties of the support.

This circuit is achieved by the fact that the plunger is made in the form of a cup closed by a diaphragm of resilient porous material facing the bottom of the support body equipped with a screw rod installed axially in the bottom of the glass, two plates between which the diaphragm is located, and a spring interacting with one of plates and rod.

The drawing shows schematically a hydro-insulating hydrostatic support, a longitudinal section. ;

The anti-vibration hydrostatic bearing includes a housing 1, a plunger coaxially located in the housing 1 with a radial clearance. Oo The plunger is designed as a cup 2,

0 closed by the diaphragm 3 of the elastic porous material facing the bottom of the housing 1. In the tumbler 2 a damper chamber 4 is made. To effect deflections-elastic diaphragm 3,

s as a result of which the porosity of its material changes, and consequently, the resistance to the flow of fluid from the working chamber 5 to the damper 4 in the bottom of the glass 2 is set

0 a screw rod 6 having the possibility of axial movement. Strengthening the deforming elastic diaphragm 3 is transmitted to the latter from the rod b through the spring 7. Elastic

5, the diaphragm 3 is located between two plates 3. At the entrance to the working chamber 5 formed by the inner surface of the housing 1 and I cup 2, a throttling device 9 is installed.

Anti-vibration hydrostatic support works as follows.

The working fluid from the network under pressure P is fed through the throttling device 9 into the working chamber 5 and then through the output cylindrical throttling gap of variable length t to the drain. A portion of the liquid from the working chamber. 5 passes through the pores of the diaphragm 3 into the damping chamber 4. Under the action of a variable load on the support, the cup 2 moves, for example, downwards. The length of the slit t increases, while its hydrodynamic resistance increases. The pressure in the working chamber 5 rises. At the same time, the resultant pressure force counteracts the load causing displacement. When the cup 2 moves up, the length of the exit slit decreases, the pressure in the working chamber 5 drops, and the cup 2 under the action of its own weight drops to the original position. This achieves the effect of vibration isolation of the base. The oscillations of the cup 2 with the vibration-insulated object mounted on it result in pressure pulsation in the working chamber 5. As a result, the control of the working chamber 5 and the damper chamber 4, which are interconnected by the throttling orifices of the diaphragm 3, results in the flow of fluid accompanied by energy swan. The increased pressure in the working chamber 5 acts on the plate 8 and causes the compression of the spring 7. Initially stretched with the screw of the first rod b and spring 7, the diaphragm 3 of porous material changes

its shape under the action of force from the working. Camera 5 to the original. This reduces its porosity and increases the energy dissipation of the vibrations or shock loads.

This device possesses large damping properties, allows you to adjust the resonant hour, that support, in the course of work around. gives the possibility of adjusting the level of energy dissipation, has a virtually unlimited capacity. For this device, there is no temperature limit for the surrounding environment.

Claims (1)

1. USSR author's certificate No. 312093, cl. F 16 F 9/10, 1969 (prototype)