Hydraulic system pressure pulsation restraining device

Abstract

The invention relates to a pressure pulsation suppressing device for a hydraulic system, comprising an input pipe, a casing, an output pipe, a corrugated pipe, an elastic thin wall and a colloidal damping layer; the input pipe is connected to one end of the casing; the output pipe is connected to one end of the casing The other end extends into the shell; the input pipe, output pipe and elastic thin wall together form a K-shaped filter; a cylindrical resonant cavity is formed between the elastic thin wall and the outer shell; the elastic thin wall A number of tapered damping holes are evenly opened in the axial direction, and the tapered damping holes are connected to the resonance chamber; the bellows is spirally wound outside the resonance chamber, and communicated with the resonance chamber through a plurality of tapered insertion tubes; The coils of the bellows are connected through several branch pipes, and switches are arranged on the branch pipes; the bellows and the resonant cavity form a plug-in spiral heterogeneous series H-type filter. The invention can attenuate the pulsating pressure in the high, middle and low frequency bands in the hydraulic system, so as to play the role of self-adaptive filtering in the working conditions of the whole frequency band.

Description

【Technical field】 [0001] The invention relates to a component device of a hydraulic system, in particular to a hydraulic system pressure pulsation suppressing device, which belongs to the technical field of hydraulic equipment. 【Background technique】 [0002] The hydraulic system has the characteristics of high power density and good operation stability, and has been widely used in the engineering field. With the development of hydraulic technology towards high pressure, high speed and large flow, the influence of pressure pulsation inherent in hydraulic system is becoming more and more prominent. Relevant studies have shown that when the pressure pulsation amplitude exceeds 10% of the working pressure of the hydraulic system, the pipeline will form a higher pressure and cause damage to the pipeline system; when the pressure pulsation amplitude exceeds 2-10% of the hydraulic system working pressure , pipelines and valves will wear and tear, endangering the reliability of th...

AI Technical Summary

Problems solved by technology

But the current resistance filter has the following disadvantages: (1) The pressure pulsation in the hydraulic pipeline is a function of time and position, and the hydraulic filter installed in the position cannot adapt to the variable working conditions; (2) the resistance filter is only suitable for Specific frequency points and narrow frequency bands have good filtering effects, and broad-spectrum filtering cannot be achieved; (3) The attenuation effect of hydraulic filters on pressure pulsations is not ideal; (4) There is no filtering effect on flow pulsations

The filtering effect of the vibration damping muffler of this patent is closely related to the radius and thickness of each filter unit on the elastic thin plate. Since there are multiple filter units on the elastic thin plate to achieve broad-spectrum filtering, the radius and thickness of each unit are different. It is limited, so it affects the filtering effect; at the same time, the vibration damping muffler of this patent does not solve the problem that the pressure pulsation changes with the position, and the adaptability to changing working conditions is not good; it has no filtering effect on the flow pulsation

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