Filtering method adopting variable-structure work condition self-adaptive filtering, adsorption and rotating magnetic field

Abstract

The invention relates to a filtering method adopting variable-structure work condition self-adaptive filtering, adsorption and a rotating magnetic field. According to the filtering method, a filter is used for attenuating pressure / flow pulsation of hydraulic oil, and a variable-structure work condition self-adaptive filter is adopted as the filter; a U-shaped particle separation module is used for achieving separation of solid particles so that the solid particles in oil liquid can move towards the pipe wall, the oil liquid flows back to an oil tank after entering an oil return barrel through an oil inlet pipe of the oil return barrel, oil liquid, containing a micro quantity of small-particle-size particles, at the center of a pipeline enters an inner barrel through an oil inlet pipe of the inner barrel to be subjected to high-precision filtering, and the service life of a filter element is prolonged; the oil liquid entering the oil inlet pipe of the inner barrel flows into a spiral flow channel of the inner barrel in a tangent inflow manner, the inner barrel wall is provided with the filter element, filter liquor is closely attached to the filter element to flow under the effect of centrifugal force, the filter liquor fast flows parallel to the surface of the filter element, filtered hydraulic oil flows out to an outer barrel in the direction perpendicular to the surface of the filter element; and pollution particles deposited at the bottom of the inner barrel can be discharged to the oil return barrel regularly through an electronic control check valve, and therefore 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 a filtering method using variable structure working conditions self-adaptive filtering, adsorption and rotating magnetic field, 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 systems to re...

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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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