Flow dividing type oil tank air exchange filter

Abstract

The invention relates to a split-flow type oil tank air exchange filter which comprises a barrel cover, a base, an upper end cover, a middle partition plate and a lower end cover, the upper end cover, the middle partition plate and the lower end cover are located in the barrel cover and distributed from top to bottom, an inner center sleeve is arranged between the upper end cover and the middle partition plate and sleeved with a first filter element, and an outer center sleeve is arranged between the middle partition plate and the lower end cover. A filter element II is arranged on the inner side of the outer central sleeve; the middle partition plate is provided with an air suction hole and an air exhalation hole, the barrel cover is provided with an air inlet hole and an air outlet hole, and the air suction hole and the air exhalation hole are both provided with limiting valves. Filtered expiration and inspiration are conducted in a split-flow mode, the first filter element intercepts dust in the air during inspiration to prevent oil in an oil tank from being polluted, the second filter element intercepts oil mist in the air carrying oil mist in the oil tank during expiration, the oil mist is attached to the inner wall of the second filter element and finally flows back to the oil tank along the inner wall of the second filter element, blockage is reduced, and the service life of the oil tank is prolonged. The service life of the filter is prolonged.

Description

technical field [0001] The invention relates to the technical field of air filters, in particular to a split-flow oil tank air exchange filter. Background technique [0002] The air filter is widely used in hydraulic oil tanks. Its function is that when the hydraulic system is working, the liquid level in the oil tank rises or falls from time to time. When it rises, the air is discharged from the inside to the outside, and when it falls, the air is sucked in from the outside to the inside (at the same time, the sucked air is filter). Existing air filter air discharge and inhalation are filtered by the same filter layer. After a period of time, the filter layer will be soaked by the intercepted oil, and the dust in the atmosphere will stay on the surface of the filter layer to form sludge during inhalation, and the filter layer is blocked and hard. filter effect. Contents of the invention [0003] Aiming at the deficiencies in the background technology, the present invent...

AI Technical Summary

Problems solved by technology

Existing air filter air discharge and inhalation are filtered by the same filter layer. After a period of time, the filter layer will be soaked by the intercepted oil, and the dust in the atmosphere will stay on the surface of the filter layer to form sludge during inhalation, and the filter layer is blocked and hard. filter effect

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