Oil filtering method for full-band variable structure working condition self-adaptive filtering, electrifying and adsorbing

Abstract

The invention relates to an oil filtering method for full-band variable structure working condition self-adaptive filtering, electrifying and adsorbing. A filter is used for attenuating pressure / flow pulses of hydraulic oil, and a full-band variable structure working condition self-adaptive filter is adopted as the filter; a U-shaped particle separating module is used for separating solid particles, the solid particles in oil liquid move to the pipe wall, enter an oil return cylinder through an oil inlet pipe of the oil return cylinder and flow back to an oil tank, the oil liquid containing a small quantity of small-grain-size particles in the pipeline center enters an inner cylinder through an inner cylinder oil inlet pipe to be subjected to high-precision filtering, and the service life of a filter element is prolonged. The oil liquid entering the inner cylinder oil inlet pipe flows into a spiral flow pass of the inner cylinder in a tangential flow entering manner. The filter element is arranged on the wall of the inner cylinder, and filter liquor flows in the manner of being attached to the filter element under the effect of the centrifugal force. The filter liquor flows fast in the manner of being parallel to the surface of the filter element, after filtering, hydraulic oil flows out of an outer cylinder in the direction perpendicular to the surface of the filter element, pollution particles deposited on the bottom of the inner cylinder can be discharged into the oil return cylinder in a timed manner through an electrically-controlled check valve, and the service life of the filter element is prolonged.

Description

【Technical field】 [0001] The invention relates to a hydraulic oil filtering method, in particular to an oil filtering method using full frequency band variable structure working conditions adaptive filtering, electrification and adsorption, and belongs to the technical field of hydraulic equipment. 【Background technique】 [0002] Statistics at home and abroad show that about 70% to 85% of hydraulic system failures are caused by oil pollution. Solid particles are the most common and harmful pollutants in oil pollution. Hydraulic system failures caused by solid particle pollutants account for 70% of total pollution failures. Metal debris accounts for 20% to 70% of the particle pollutants in hydraulic system oil. Taking effective measures to filter out the solid particle pollutants in the oil is the key to the pollution control of the hydraulic system, and it is also a reliable guarantee for the safe operation of the system. [0003] Filters are key components of hydraulic s...

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Problems solved by technology

[0004] However, the high-pressure filter used in the existing hydraulic system has the following deficiencies: (1) various hydraulic components have different requirements for the cleanliness of the oil, and the particle sizes of the solid particles in the oil are also different. This requires the installation of many different types of filters at different positions in the hydraulic system, which brings about problems of cost and installation complexity; (2) The filter in the hydraulic system mainly adopts the filter cake filter method, and the filtrate is perpendicular to the The surface of the filter element flows, and the intercepted solid particles form a filter cake and gradually thicken, and the filtration speed gradually decreases until the filtrate stops flowing out, which reduces the service life of the filter element

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