Hydraulic low-frequency-absorption vibration isolator

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...

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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

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