SU1186851A1 - Hydrostatic bearing - Google Patents

Abstract

1. A GSCHROSTATIC SUPPORT, comprising a housing and a floating insert enclosing a shaft axle, as well as a channel for supplying working fluid under pressure and drain cavities, characterized in that, in order to increase reliability by decreasing the frequency range of the shaft vibrations, the axle shaft is extended with a shank having a screw thread, the floating insert is made in the form of a cup, spring-loaded from the outside of its bottom to the end of the shank of the journal shaft, and the chamber formed by the bottom of the floating liner and the end of the shank united with one of the drain cavities. 2. The support according to claim 1, distinguishes with the fact that it is provided with an adjusting device located between the spring and the core (L of the adjusting device. Giving oo ON 00 cri

Description

one

The invention relates to mechanical engineering and can be used to reduce the level of vibration of a tour. Bombers in a wide range of frequencies.

The purpose of the invention is to increase the reliability of the system, reducing the level of rotor vibrations in a wide frequency range.

The drawing shows a hydrostatic bearing.

Hydrostatic support contains housing 1 and a floating liner 3 enveloping the axle of shaft 2. The housing has a channel 4 for supplying the working fluid under pressure and drain cavities 5 are provided. The axle of shaft 2 has a shank 6 with screw thread 7. The floating liner 3 is made in the form of a glass, The spring 8 is clamped on the outer side of its bottom to the end of the shank 6. An adjusting device 9 is located between the case 1 and the spring 8. The chamber 10 formed by the bottom of the floating liner 3 and the end of the shank 6 is connected to one of the drain cavities 5. For O-rings 11 are mounted on the lugs of areas with a real pressure on the floating bushings.

Hydrostatic bearing works as follows.

868512

Through port A, working fluid is supplied under pressure. The axle shaft 2 is weighed by a hydrostatic effect. In the original

5 position floating liner 3

pressed by the spring 8 to the end of the shank 6 of the shaft 2. Its position is determined by the adjusting device 9. The working fluid exits through

0 hole 12 to drain. When spinning the screw shaft, threading 7 increases the pressure in chamber 10 and after the pressure of the spring 8 is balanced, the liner 3 moves to the left

5 in the axial direction, spring 8

shrinks. At the same time, the free length of the shaft increases, and consequently, the stiffness of the shaft decreases, which shifts the resonant frequency

0 vibrations. Since the addiction

Since the shaft stiffness from its length is inversely proportional to the shaft length in the third degree, then its small change is sufficient to vary considerably, its stiffness.

Thus, the shaft on the proposed hydrostatic support, during spinup, passes through resonant frequencies with a smaller amplitude of oscillations, which significantly increases

reliability, performance and service life, as when passing through the critical momentum there is a strong vibration.

Claims (2)

1. HYDROSTATIC BRACKET, comprising a housing and a floating liner wrapping around the shaft pin, as well as a channel for supplying working fluid under pressure and drain. cavity, characterized in that, in order to increase reliability by reducing the level of vibration of the shaft while increasing the frequency range, the shaft pin is made with a shank having a screw thread, the floating liner is made in the form of a cup spring-loaded from the outside of its bottom to the end of the shaft pin shaft and the chamber formed by the bottom of the floating liner and the end of the shank is connected to one of the drain cavities. 2. Prop pop. 1, characterized in that it is provided with an adjustment device located between the spring and the housing. SU w, 1186851