Hydraulic anti-resonance vibration isolator with frequency modulated by air spring

Abstract

The invention provides a hydraulic anti-resonance vibration isolator with frequency modulated by an air spring in the technical field of vibration control. The hydraulic anti-resonance vibration isolator comprises a first end cover, an isolation film, an outer cylinder, a vibration isolation spring, an inner cylinder and a second end cover; one end of the inner cylinder extends into the outer cylinder, the other end of the inner cylinder is buckled with the second end cover, and one end, away from the second end cover, of the outer cylinder is buckled with the first end cover; the first end cover, the outer cylinder, the vibration isolation spring, the inner cylinder and the second end cover jointly form a sealed cavity structure after the vibration isolation spring is respectively connected with the outer wall of the inner cylinder and the inner wall of the outer cylinder in an attaching mode; and the isolation film is connected in the first end cover to form a sealed elastic cavity.The hydraulic dynamic anti-resonance vibration isolator with adjustable anti-resonance frequency can well block vibration excitation with constant frequency from transmitting to an object to be isolated, and has higher vibration isolation efficiency near the vibration isolation frequency.

Description

technical field [0001] The invention relates to a hydraulic dynamic anti-resonance vibration isolator with adjustable anti-resonance frequency, which belongs to the field of vibration control. Background technique [0002] In the field of engineering, there are a large number of rotating machines with constant speed. They are vibration sources with constant frequency. This vibration source will cause various failures in the mechanical system, which will affect the performance and life of the machine. It is more important in the vibration control of the system and has a wide range of applications. [0003] For fixed-frequency vibration, dynamic vibration absorption and dynamic anti-resonance are effective vibration reduction measures. U.S. Patent No. 755268 (patent 755268), entitled "dynamic vibration absorber (dynamic vibration absorber)" authorized to GivenA.Brewer in April 1979, discloses a kind of dynamic vibration absorber. The source has a good vibration absorption ef...

AI Technical Summary

Problems solved by technology

However, dynamic anti-resonance and dynamic vibration absorption have a common disadvantage, that is, both have strong frequency selectivity, and cannot effectively block the transmission of fixed-frequency vibration when the external excitation frequency fluctuates

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