Filtering method adopting magnetization, adsorption and rotating magnetic field for hydraulic system

Abstract

The invention relates to a filtering method adopting magnetization, adsorption and a rotating magnetic field for a hydraulic system. Separation of solid particles is achieved through a U-shaped particle separating module, and the solid particles in oil are made to move to the pipe wall; at an outlet of the U-shaped particle separating module, the oil which is rich in the solid particles and near the pipe wall enters an oil return barrel through an oil return barrel oil inlet pipe and then flows back into an oil tank, and the oil which contains trace of small-diameter particles and is located in the pipe center enters an inner barrel through an inner barrel oil inlet pipe to be subjected to high-precision filtering, so that the service life of a filter element is prolonged, and the filtering cost and complexity are lowered; the oil entering the inner barrel oil inlet pipe flows into a spiral flow channel of the inner barrel in a tangential inflow mode, the inner barrel wall is used as the filter element, filter liquor flows by tightly attaching the filter element under the effect of centrifugal force, the filter liquor quickly flows in parallel to the surface of the filter element, and the filtered hydraulic oil flows out to an outer barrel in the direction perpendicular to the surface of the filter element; and polluting particles deposited at the bottom of the inner barrel can be discharged to the oil return barrel through an electrically operated check valve, so that 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 for a hydraulic system adopting magnetization, adsorption and rotating magnetic fields, 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 particulate pollution accounted for 70% of total pollution failures. Among the particulate pollutants in hydraulic system oil, metal wear debris accounts for between 20% and 70%. Taking effective measures to filter out solid particle pollutants in the oil is the key to the pollution control of the hydraulic system and a reliable guarantee for the safe operation of the system. [0003] The filter is a key element of the hydraulic system to filter out solid ...

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Problems solved by technology

[0004] However, the high-pressure filters used in the existing hydraulic systems have 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 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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