High-lubricating low-friction piston

A low-friction, piston technology, applied in the direction of pistons, cylindrical pistons, plungers, etc., can solve the problems of reduced engine efficiency, large frictional resistance, and shortened service life, so as to reduce the possibility of cylinder knocking, enhance lubrication performance, and use The effect of life extension

Inactive Publication Date: 2008-05-14
周林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • High-lubricating low-friction piston

Examples

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Effect test

Embodiment 1

[0022] Embodiment 1: Taking the piston of a certain 135 type diesel engine directly as 135 millimeters as an example, the top of this piston has a common deep pit ω-shaped combustion chamber, and the depth of the deep pit ω-shaped combustion chamber on the top of the piston is 20 millimeters , have completed the opening of all piston ring grooves. This type of piston has a 30 mm high head outer circle. The depth of the head outer circle around the head outer circle surface from the top surface is 3 mm from the top surface of this piston. 3 mm width and 2 mm cross-section is a rectangular annular groove 1, and then the same annular groove 1 is opened every 2 mm, each groove 1 can be continuous or discontinuous, the accompanying drawing Each groove 1 shown can be continuous, and there are 6 grooves in total, so that 7 ring-shaped ridges 2 with a height of 3 millimeters and a width of 2 to 3 millimeters are naturally formed on the outer circle of the head of this type of piston. ...

Embodiment 2

[0026] Embodiment 2 (as accompanying drawing 2): Taking a flat top piston with a diameter of 95 mm as an example, all the piston ring grooves have been opened, and a 1.5 mm deep and 1.5 wide ring groove is opened in the middle of the outer circle of its head. mm, a semicircular annular groove 1 in cross-section, so that the outer surface of the upper and lower heads of the groove 1 naturally forms two ridges 2, and these grooves 1 and ridges 2 are parallel to the piston ring groove. . The ring land excircle of this piston is narrow and small, does not offer annular groove 1 here either. On all the outer surfaces of the piston skirt that can be in contact with the cylinder wall, multiple annular grooves 1 parallel to the piston ring groove are uniformly provided. The interval between adjacent annular grooves 1 is 1 mm, and the width of the annular groove 1 is 1 mm. The depth is 0.8 mm, the cross section of the groove 1 is rectangular, thus forming the annular ridge 2, the widt...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J1/08F02F3/00F04B39/00
Inventor 周林周天宇
Owner 周林
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