Method for filtering and purifying hydraulic oil

Abstract

A method for filtering and purifying hydraulic oil comprises the steps of (1) using an electrical heating system for heating oil to 60 DEG C; (2) performing primary filtering through a first filtering device which comprises novel high-gradient electromagnetic filters connected in parallel so as to filter ferromagnetic corrosion products in the oil and macromolecules generated by oxidation during usage of the hydraulic oil; (3) performing secondary filtering through a second filtering device to remove large solid particles; (4) subjecting the oil to tertiary filtering through a third filtering device which comprises common parallelly-connected filters high in filtering accuracy to form redundancies; (5) opening exhaust valves which are mounted after filtering of all stages to remove gas impurities in the oil and bubbles generated during filtering; (6) removing moisture in the oil through an oil-water separation system; (7) monitoring the oil cleanliness class in real time through a contamination particle counter, and closing a solenoid valve of an oil return pipe when the purification class requirement is reached.

Description

technical field [0001] This article relates to a hydraulic oil filtration and purification method, specifically involving the use of magnetic filtration, coarse filtration and precision filtration three-stage redundant cycle filtration method to obtain oil of required cleanliness level. The pollution sources of hydraulic oil mainly include: solid particles, water, air, macromolecules produced by oxidation, etc. The industrial waste hydraulic oil pollutants are filtered through this method, and fuzzy control is realized, which is used to purify hydraulic components and systems. Contaminated oil can be reused. The method adopts fuzzy control module, which can realize automatic control. The filtering method has the advantages of low cost, short time, long service life, high reliability, automatic control, etc., and belongs to the technical field of auxiliary facilities for aerospace, automobiles, and machine tools. Background technique [0002] Compared with the traditional f...

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Problems solved by technology

[0003] The existing multi-stage filtration method is a three-stage filtration method, such as "Hydraulic Oil Purification System" with application number CN200320124413, which proposes a multi-stage purification method, but there are shortcomings such as no automatic control, frequent cleaning, and short service life.

The "Intelligent Control Combined Oil Purification Device" with application number 2012201811044 designed an intelligent control, but the filtration accuracy is not high enough, the life is short, and the filtration efficiency is low.

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