Oil filtering method based on full-band filtration, electrification, separation and centrifugation

Abstract

The invention provides an oil filtering method based on full-band filtration, electrification, separation and centrifugation. According to the oil filtering method, the pressure / flow pulsation of hydraulic oil is attenuated through a filter, and a full-band filter is adopted to serve as the filter; separation of solid particles is achieved through a U-shaped particle separation module, so that the solid particles in the oil are made to flow towards the pipe wall, enter an oil returning cylinder through an oil inlet pipe of the oil returning cylinder and then flow back into an oil tank; the oil, containing a micro amount of particles with small particle sizes, in the center of a pipeline enters an inner cylinder through an oil inlet pipe of the inner cylinder so as to be subjected to high-precision filtration, and thus the service life of a filter element is prolonged; the oil entering the oil inlet pipe of the inner cylinder flows into a spiral passageway of the inner cylinder in a tangential flowing mode, the inner cylinder wall serves as the filter element, filtrate flows closely along the filter element under the action of centrifugal force and flows rapidly in the direction parallel to the surface of the filter element, and the filtered hydraulic oil flows out into an outer cylinder in the direction perpendicular to the surface of the filter element; and contamination particles deposited at the bottom of the inner cylinder can be discharged out into the oil returning cylinder through an electric-control stop valve at regular times, and thus 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 filtering, electrification, separation, adsorption and centrifugation, 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 remove so...

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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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