Two-stage compressed air compressor

Abstract

The invention provides a two-stage compressed air compressor. The two-stage compressed air compressor comprises an eccentric connecting rod and a crankshaft, wherein a high-pressure piston and a low-pressure piston are connected with the eccentric connecting rod through piston pins. The crankshaft is connected with a motor main shaft and the eccentric connecting rod, the area between a valve plateand a cylinder cover of the air compressor is defined as a low-pressure cavity and a high-pressure cavity, and when the low-pressure piston moves from a bottom dead center to a top dead center and the high-pressure piston moves from the top dead center to the bottom dead center, after being compressed, gas in a low-pressure piston cylinder body is discharged into the low-pressure cavity from thelow-pressure piston cylinder body and then enters a cylinder body of the high-pressure piston. When the low-pressure piston moves from the top dead center to the bottom dead center and the high-pressure piston moves from the bottom dead center to the top dead center, gas in the high-pressure piston cylinder body enters the high-pressure cavity from the interior of the high-pressure piston cylinderbody and then is exhausted, and therefore secondary compression is conducted on the gas in the piston cylinder, the exhaust pressure is increased, the exhaust temperature is reduced, loads of all assemblies of the air compressor are reduced, and the service life of the whole compressor is prolonged.

Description

technical field [0001] The invention belongs to the technical field of air compressors for vehicles, and in particular relates to a two-stage compressed air compressor. Background technique [0002] The air compressor used in the car is mainly used as the air source for the equipment including the car brake, suspension, door opening and other auxiliary air devices. The piston air compressor is a common electric air compressor for the car. compressor, figure 1 It is a sectional view showing a sectional structure of a common piston air compressor cylinder in the prior art, see figure 1 , the piston air compressor includes two rows of pistons, which are defined as the first piston 10a and the second piston 20a. The distance D between the piston shafts of the first piston 10a and the second piston 20a is shown in the figure. It can be imagined , when the air compressor is running with two pistons reciprocating up and down, the crank-link mechanism of the two pistons will gener...

AI Technical Summary

Problems solved by technology

[0003] In the existing air compressor, the two-cylinder gas is directly discharged after one-stage compression, the gas compression efficiency is low, and the energy loss is large. In addition, during the compression process, the heat generated by the alternating reciprocating motion of the piston and the compressed air heats up the temperature of each component , which in turn leads to excessively high exhaust gas temperature, which ultimately affects the service life of bearings and other components, and the stability of the whole machine cannot be guaranteed.

[0004] In view of this, the existing technology should be improved to solve the technical problems of insufficient compression, high exhaust temperature and short service life of the air compressor in the existing technology

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