Oil filtering method adopting filter, magnetization and adsorption

Abstract

The invention relates to an oil filtering method adopting a filter, magnetization and adsorption. Pressure and flow pulsation of hydraulic oil is attenuated by means of the filter, and a full-frequency-band hydraulic system pressure pulsation filter is adopted as the filter; separation of solid particles can be achieved by means of a U-type particle separation module, so that the solid particles in oil move to a pipe wall, the solid particles flow back to an oil tank after entering an oil return cylinder through an oil return cylinder oil inlet pipe, oil in the center of a pipeline containing a small quantity of small-grain-size particles enters an inner cylinder through an inner cylinder oil inlet pipe for high-precision filtering, and the service life of a filter element is prolonged; the oil entering the inner cylinder oil inlet pipe flows into a spiral channel of the inner cylinder in a tangential inflow mode, an inner cylinder wall serves as the filter element, filter liquid is attached to the filter element to flow under the action of centrifugal force, the filter liquid quickly flows parallel to the surface of the filter element, and the filtered hydraulic oil flows out of an outer cylinder in the direction perpendicular to the surface of the filter element; pollution particles deposited at the bottom of the inner cylinder are discharged out of the oil return cylinder through an electric control check valve, and accordingly 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 a filter, magnetization 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 systems to remove solid particle contaminants. The solid particle poll...

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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) The flow pulsation and pressure pulsation caused by the periodic oil discharge mechanism of the hydraulic pump in the hydraulic system cause the filter element in the filter to be forced to work. Vibration reduces the filtration performance; (2) 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, so it is necessary to install them at different positions in the hydraulic system There are many different types of filters, which brings problems of cost and installation complexity; (3) The filter in the hydraulic system mainly adopts the filter cake filtration method, and the filtrate flows perpendicular to the surface of the filter element during filtration, and the intercepted solid The particles form a filter cake and gradually thicken, and the filtration rate gradually decreases until the filtrate stops flowing out, reducing the service life of the filter element

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