Combined sealing piston ring

Abstract

The present invention relates to a combined packing piston ring used in the piston machines of internal combustion engine and air compressor, etc. Said combined packing piston ring includes subring A and subring B, said two subrings have open-end respectively. Said invention also provides the assembly method of said two subrings and concrete steps. The adoption of said invention can raise cylinder compression ratio, can make full combustion, raise power of internal combustion engine, save fuel oil and can prolong the service life of piston ring.

Description

Technical field [0001] The invention relates to a piston ring, in particular to a combined sealing piston ring used in piston machines such as internal combustion engines and air compressors. Background technique [0002] Because the traditional piston ring works in a high temperature and high pressure environment, there is an opening on the piston ring to prevent it from being stuck in the cylinder groove after being heated and expanded, resulting in cylinder scuffing. But in this way, when the internal combustion engine works, gas will enter the gap between the cylinder wall and the piston from the combustion chamber and then enter the next chamber from the opening, so the opening of the piston ring becomes the main channel for leakage, and is also the channel for blowing oil. According to the "Piston Ring" published by Railway Press, "for a general internal combustion engine, the air pressure is 25% of the original after the first ring, 10% after the second ring, and 5% a...

AI Technical Summary

Problems solved by technology

Its disadvantages are: because the piston ring works in a high-temperature and high-pressure environment, and the gas shock and mechanical vibration generated during work will cause the positioning pin or pin to fall off, once the positioning pin or pin falls off, it will cause serious damage to the engine, and its processing and assembly relatively troublesome

Its disadvantage is: because the joint surface of the two rings is an inclined plane, when the piston ring is working, due to the working pressure and mechanical vibration, the two rings will be relatively offset, so that the actual shape of the two rings is round and waist-shaped, which is in line with the cylinder wall. It is easier to rub it into an ellipse when rubbing, which affects the service life of the cylinder. In this way, the gain outweighs the loss, and the trapezoidal bevel processing of the trapezoidal bevel split ring is also very difficult

Its disadvantage is that, in order to prevent the relative rotation of the two sub-rings, the above two schemes adopt the design of the joint shoulder surface as either an ellipse or an eccentric circle, and the thickness of the shoulders of the two rings is different, resulting in the entire ring The strength is reduced, and deformation is easy to occur. Once deformation occurs, the sealing effect will deteriorate, the air tightness will be reduced, the purpose of use will not be achieved, and the service life of the piston ring will be affected. At the same time, the processing of the above two technical solutions is relatively complicated.

Images