Ventilation valve capable of preventing oil gas leakage

Abstract

The invention relates to a ventilation valve capable of preventing oil gas leakage. The ventilation valve comprises a valve body, a top cover, a pressure spring, a ventilation top block, a check ball and a limiting rod. A through ventilation channel is formed in the center of the valve body, an annular boss is arranged on the outer side of the top of the ventilation channel, a threaded connecting column is arranged on the outer side of the bottom, and a sealing channel is formed in the middle of the ventilation channel. The top cover is buckled on the annular boss through the inner cavity, and a ventilation gap is reserved between the inner cavity of the top cover and the cylindrical surface of the annular boss; a ventilation ejector block is arranged above the sealing channel, a check ball capable of moving up and down along the ventilation channel is placed in the ventilation channel below the sealing channel, and a limiting rod is transversely fixed to the bottom of the valve body and used for preventing the check ball from falling off from the bottom of the ventilation channel. The check ball is additionally arranged in the channel, and the check ball can be in closed connection with the sealing channel in the ventilation valve when the ventilation valve is in a transverse placement state, so that the oil leakage condition is prevented; when the ventilation valve is in a normal vertical working state, the check ball does not affect the pressure relief function of the ventilation valve, and the ventilation valve is particularly suitable for being installed on an execution component with the position capable of being changed along with a gearbox.

Description

technical field [0001] The invention relates to the field of breathable pressure regulating valves, in particular to a breathable valve capable of preventing oil and gas leakage. Background technique [0002] After the gearbox works for a long time, the oil temperature will rise, which will cause the internal pressure to be too large, which will easily cause damage to the sealing gaskets and other components on the gearbox. There are many types of existing vent valves, but the pressure relief vent valves used on the gearbox are generally a one-way valve structure with a spring. For the structure where the working position of the gearbox never changes, it is installed on the gearbox The ventilation valve on the upper part can maintain the vertical working state. At this time, there is a safe distance between the oil surface in the cavity and the ventilation valve, and the oil cannot flow out of the cavity from the ventilation valve, so that the working state of the ventilatio...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a breather valve capable of preventing oil and gas leakage, which effectively solves the problem of oil leakage when the breather valve on the gearbox is in a lateral working state by setting a check ball

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