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Hydraulic low-frequency-absorption vibration isolator

A vibration isolator, hydraulic technology, applied in the direction of shock absorber, shock absorber-spring combination, shock absorber, etc., can solve the problems of insufficient bearing capacity, inability to realize broadband of mechanical vibration and double vibration isolation of line spectrum, etc. Achieve the effect of easy bearing capacity

Pending Publication Date: 2020-01-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a hydraulic low-frequency vibration isolator. The purpose is to use the hydraulic vibration isolator to carry the mechanical weight and isolate the mechanical low-frequency broadband vibration. Through the transmission of hydraulic pressure, The unbalanced force generated by the change of the mechanical center of gravity caused by mechanical vibration and external disturbance is distributed on the hydraulic vibration isolator immediately, and the uniform load is automatically realized; and by directly connecting the hydraulic vibration absorber and the hydraulic vibration isolator, a hydraulic amplification effect is established. The inertial coupling mechanism realizes dynamic tuning, so that anti-resonance occurs at the line spectrum frequency and the line spectrum frequency is filtered to realize the isolation of the mechanical vibration line spectrum, thereby solving the problem that the existing technology cannot achieve double vibration isolation of mechanical vibration broadband and line spectrum, And the technical problem of insufficient carrying capacity

Method used

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  • Hydraulic low-frequency-absorption vibration isolator
  • Hydraulic low-frequency-absorption vibration isolator

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the hydraulic low-frequency vibration isolator of this embodiment includes a hydraulic vibration isolator 1 and a hydraulic vibration absorber 2 .

[0032]The hydraulic vibration isolator 1 is composed of a bellows elastic oil tank 3 and a top cover 4 . Preferably, the circumferential surface of the bellows elastic oil tank 3 in this embodiment is a three-layer metal bellows structure, which can provide better elasticity in the vertical direction. The metal bellows structure and the base enclose the oil chamber 10 . A through hole is opened in the center of the base of the bellows elastic oil tank 3 , two through holes are opened in the circumferential direction, and the three through holes are connected internally to form a three-way channel as the hydraulic oil channel 12 . Among them, one through hole in the circumferential direction of the base is used as the connection interface of the hydraulic vibration absorber 2, and the other throu...

Embodiment 2

[0041] Such as figure 1 As shown, the difference between the hydraulic low-frequency vibration isolator of this embodiment and the structure described in Embodiment 1 is that the bellows elastic oil tank 3 is changed to a single bellows structure, and other structures are basically the same, and only need to be adapted. The elasticity of single bellows is not as good as that of three bellows, but the manufacturing process is relatively simple, and it is suitable for application in light-load vibration isolation scenarios.

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Abstract

The invention discloses a hydraulic low-frequency-absorption vibration isolator, and belongs to the field of mechanical vibration control. The hydraulic low-frequency-absorption vibration isolator comprises a hydraulic vibration isolator body and a hydraulic vibration absorber, wherein the hydraulic vibration isolator body comprises a corrugated pipe elastic oil tank and a top cover; the circumferential face of the corrugated pipe elastic oil tank is of a metal corrugated pipe structure, and an oil cavity is defined by the circumferential face of the corrugated pipe elastic oil tank and a baseof the corrugated pipe elastic oil tank; a hydraulic oil channel communicating the oil cavity with the outside is formed in the base; the top cover is in seal fit with the upper end of the corrugatedpipe elastic oil tank, the lower portion of the top cover is of a cylindrical boss structure, and a cylindrical boss is located in the oil cavity; a gap is reserved between the lower end face of thecylindrical boss and the upper end face of the base, and the gap is equal to the limiting distance of the hydraulic vibration isolator body; an exhaust channel communicating the outside with the oil cavity is formed in the top cover; the hydraulic vibration absorber comprises an external guide pipe and an external hydraulic oil cylinder; and the external hydraulic oil cylinder is connected with the hydraulic oil channel through the external guide pipe. According to the hydraulic low-frequency-absorption vibration isolator, dual vibration isolation of mechanical vibration broadband and line spectrum can be achieved, and meanwhile the use requirements for large bearing force and uniform bearing are met.

Description

technical field [0001] The invention belongs to the field of mechanical vibration control, and relates to a hydraulic low-frequency suction vibration isolator, and more specifically, to a novel hydraulic low-frequency suction vibration isolator with large bearing capacity and uniform load. Background technique [0002] One of the characteristics of mechanical vibration is periodicity, which is reflected in a discrete line spectrum on the frequency spectrum. The traditional vibration isolator isolates the vibration of each frequency component according to a certain proportion, and has a good vibration isolation effect in a wide frequency band, which can reduce the total level of vibration in the whole frequency band, but it is difficult to eliminate the vibration line spectrum. In addition, low-frequency vibration isolation is also a shortcoming of traditional vibration isolation technology because of the contradiction between low stiffness and stability. [0003] Mechanical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F13/00
CPCF16F13/002
Inventor 赵耀张赣波储炜周维新
Owner HUAZHONG UNIV OF SCI & TECH
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