High-lubricating low-friction piston

Abstract

The invention relates to a high lubrication low friction piston applied to a reciprocating piston internal combustion engine and an air compressor. The technical proposal is that the invention mainly consists of a piston head part, a piston skirt part and a piston cirque trough. The invention is characterized in that the side surface of the external wall of the piston is provided with a plurality of concave troughs which can move along the side surface radian of the external wall of the piston; an interval on the side surface of the external wall of part of the piston preserved between adjacent concave troughs forms a convex ridge; the most convex position of the convex ridge is aligned with the side surface of the external wall of the piston. The invention has the beneficial effects of reinforcing the lubrication performance, reducing the friction resistance, preventing cylinder expansion and locking, reinforcing the sealing performance, improving the exhaust standard and relieving the pollution exhaust, and prolonging the service life of the engine.

Description

1. Technical field: [0001] The invention relates to a piston in the field of mechanical manufacturing, in particular to a high-lubrication and low-friction piston applied to reciprocating piston internal combustion engines and air compressors. 2. Background technology: [0002] The piston is the heart of the engine, and the lubrication performance between the piston and the cylinder wall of the internal combustion engine directly determines the working efficiency and service life of the engine. It is mainly composed of the piston head, piston skirt and piston ring groove. The lubrication between the existing internal combustion engine piston and the cylinder wall is achieved by oil distribution and splash lubrication from the oil ring to the cylinder wall. The ring of the oil ring The groove has an oil hole leading to the inside of the piston, from which the lubricating oil can flow to the oil ring. The defect is that the distribution of the lubricating oil on the friction s...

AI Technical Summary

Problems solved by technology

It is mainly composed of the piston head, piston skirt and piston ring groove. The lubrication between the existing internal combustion engine piston and the cylinder wall is achieved by oil distribution and splash lubrication from the oil ring to the cylinder wall. The ring of the oil ring The groove has an oil hole leading to the inside of the piston, from which the lubricating oil can flow to the oil ring. The defect is that the distribution of the lubricating oil on the friction surface is not sufficient and uniform; Maintaining a proper oil gap is the key to the smooth reciprocating movement of the piston in the cylinder. Due to the high load and high temperature caused by the high-speed reciprocating movement, the existing contact between the piston and the cylinder wall is the relative movement between the surfaces and Friction, frictional resistance is large, prone to poor lubrication and wear, especially the piston skirt may even have a certain deformation, so that the gap between the piston skirt and the cylinder wall is too small, resulting in cylinder seizure and cylinder scuffing. If the gap between the walls is too large, there will be cylinder knocking, cylinder liner cavitation, excessive noise, etc.; the working environment of the outer circle of the head and the outer circle of the ring bank located at the head of the piston is worse, and poor lubrication will cause wear and tear more easily. Cylinder scuffing, poor sealing, etc.

These can reduce engine efficiency, increase fuel consumption, and shorten service life

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