Variable structure working condition self-adaption hydraulic filtering equipment

Abstract

The invention relates to a self-adaptive hydraulic filter device with variable structure and working conditions. The input pipe is connected to one end of the casing; the output pipe is connected to the other end of the casing; the S-shaped elastic thin wall is installed in the casing along the radial direction of the casing, and an expansion valve is formed inside the casing. Cavity and contraction cavity; input tube, output tube and S-shaped elastic thin wall together form an S-shaped cavity filter; a cylindrical resonant cavity is formed between the S-shaped elastic thin wall and the shell; the shaft of the S-shaped elastic thin wall A number of conical variable structure damping holes are evenly opened upwards, and the conical variable structure damping holes are connected to the resonance cavity; the conical variable structure damping holes are composed of conical elastic damping tubes and slit holes; the bellows are spirally wound outside the resonance cavity , communicate with the resonant cavity through a plurality of tapered insertion tubes; each ring of the bellows communicates through a number of branch pipes, and a switch is provided on the branch pipes. 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 variable-structure working condition self-adaptive hydraulic filter 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 t...

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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