Supercharger provided with switching valve

Abstract

The invention discloses a supercharger provided with a switching valve. The supercharger comprises a lubricating cavity and a driving shaft; the lubricating cavity is defined by a bearing plate and acover plate which are in sealing connection with each other; one end of the driving shaft extends to the outer side of the cover plate; a depressurizing hole is formed in the driving shaft; one end ofthe depressurizing hole communicates with the lubricating cavity and the other end communicates with the outside; the switching valve is installed in the depressurizing hole in an embedded mode; andthe switching valve comprises a valve body, a valve seat, a rolling ball and a cylindrical spring. The supercharger can timely release pressure in the lubricating cavity, maintain consistency betweenthe pressure in the lubricating cavity and the external pressure, and avoid leakage of oil gas mixture in the lubricating chamber into the inside of the mechanical supercharger. Furthermore, heat canbe taken while the pressure is released, so the service life and reliability of the mechanical supercharger are improved and system noises are lowered.

Description

technical field [0001] The invention relates to the technical field of motor vehicle engines, in particular to a mechanical supercharger provided with an on-off valve. Background technique [0002] A supercharger is a device that compresses the inhaled gas and discharges it from the gas outlet. It is a forced air intake device for internal combustion engines. When running, the crankshaft of the engine drives the supercharger through the belt, and the compressed air enters the combustion chamber of the engine after cooling, mixes with fuel, and compresses and ignites to do work. When the supercharger is working, the gears and bearings will generate heat when they rotate, so the lubricating chamber needs to be filled with an appropriate amount of lubricating oil to lubricate the gears and bearings while taking away the heat in time. At present, there is a known supercharger, the lubricating chamber is closed, and the pressure and temperature of the oil-air mixture in the lubr...

AI Technical Summary

Problems solved by technology

[0006] 2. The diaphragm spring is tightly pressed on the outer surface of the rolling ball, and it will be deformed by the extrusion of the rolling ball, so that the axial space between it and the rolling ball has the effect of collecting oil, but it cannot be discharged in time, causing the rolling ball to move along the axis. The direction movement is easily blocked, which increases the opening pressure of the rolling ball

[0007] There are two defects and disadvantages. After a period of use, the pressure relief valve will not exhaust smoothly, and the pressure cannot be released in time, and the function is unreliable.

[0008] 3. The manufacturing cost of the diaphragm spring is relatively high

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