Method for filtering by adoption of full-band variable structure working condition self-adaptive wave filtering, electrification and adsorption

Abstract

The invention relates to a method for filtering by adoption of full-band variable structure working condition self-adaptive wave filtering, electrification and adsorption. According to the method, the pressure / flow pulsation of hydraulic oil is dampened through a filter, and a full-band variable structure working condition self-adaptive wave filter is adopted; solid particle separation is achieved through a U-shaped particle separation module, so that solid particles in an oil liquid move towards a pipe wall, the oil liquid rich in solid particles and near the pipe wall enters an oil return cylinder through an oil return cylinder module and then backflows to an oil tank, the oil liquid containing trace amounts of small-sized particles and existing at the pipe center enters an inner cylinder through an inner cylinder oil inlet pipe for high-precision filtering, and the service life of a filtering core is prolonged, and the wave filtering cost and complexity can be reduced; the oil liquid entering the inner cylinder oil inlet pipe flows into the spiral flow channel of the inner cylinder in a tangential inflow manner, and the inner cylinder wall is taken as the filtering core, so that a filtrate flows while clinging to the filtering core under the action of centrifugal force, that is, the filtrate quickly flows parallel to the surface of the filtering core, and the filtered hydraulic oil outflows into an outer cylinder in the direction perpendicular to the surface of the filtering core; and pollution particles depositing at the bottom of the inner cylinder can be regularly discharged into the oil return cylinder through an electric control check valve, so that the service life of the filtering core can be prolonged.

Description

【Technical field】 [0001] The invention relates to a hydraulic oil filtering method, in particular to a filtering method for self-adaptive filtering, electrification and adsorption using full-frequency variable structure working conditions, 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 contamination account for 70% of total contamination failures. Among the particulate pollutants in hydraulic system oil, metal wear debris accounts for between 20% and 70%. 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] The filter ...

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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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