CN113685286A

CN113685286A - Piston ring for internal combustion engine

Info

Publication number: CN113685286A
Application number: CN202111132860.7A
Authority: CN
Inventors: 余守真; 高元煦; 张季任
Original assignee: Nantong Siwei Power Machinery Technology Co ltd
Current assignee: Nantong Siwei Power Machinery Technology Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-11-23

Abstract

The invention discloses a piston ring for an internal combustion engine, which comprises a piston ring body and is characterized in that: an air flow sealing structure for sealing the gap of the opening end is arranged at the opening end of the piston ring body; the air flow sealing structure comprises a protruding body integrated with one end of the opening end of the piston ring body, and a clamping groove clamped with the protruding body is formed in the other end of the opening end of the piston ring body. According to the invention, through the design of the open-end airflow sealing structure, the sealing performance of the piston ring is greatly improved, the air blow-by amount is reduced, the efficiency of the diesel engine is improved, the consumption of engine oil is reduced, and the service life of the engine is prolonged.

Description

Piston ring for internal combustion engine

Technical Field

The invention relates to a piston ring of an internal combustion engine.

Background

The temperature of the diesel engine is sharply increased from starting to normal working cylinder, and a sealing gap is required to be reserved for the piston ring during design and installation by considering the expansion and contraction effect of materials. When the engine works, high-temperature combustion gas enters a crankcase through a minimum sealing gap between a piston and a piston ring, and a part of power loss is caused. High performance internal combustion engines operate with relatively large power losses even when the minimum seal clearance is at its ideal level. In addition, the piston ring rotates freely in the ring groove, and if the opening directions of the first gas ring and the second ring are aligned in the axial direction (commonly called as symmetrical opening), the gas leakage amount and the oil consumption amount are obviously increased, the engine is not completely combusted, and blue smoke is generated. In addition, because the cylinder has inevitable out-of-roundness when working at high temperature, the existing piston ring is difficult to form a stable grinding surface with the cylinder wall when rotating in the groove, thereby failing to achieve good sealing effect and causing blow-by and power loss. If the blow-by amount is continuously increased, the wear and even the fracture of piston rings and pistons can be caused, and the service life of the engine is reduced.

Disclosure of Invention

The invention aims to provide a high-performance piston ring for an internal combustion engine, which improves the performance of the engine.

The technical solution of the invention is as follows:

the utility model provides a piston ring for internal-combustion engine, includes the piston ring body, characterized by: an air flow sealing structure for sealing the gap of the opening end is arranged at the opening end of the piston ring body; the air flow sealing structure comprises a protruding body integrated with one end of the opening end of the piston ring body, and a clamping groove clamped with the protruding body is formed in the other end of the opening end of the piston ring body.

The protruding body and the clamping groove are matched in a Z shape, or in an N shape, a W shape and the like.

And a positioning structure which is matched and positioned with the groove wall of the piston ring is arranged on one side of the piston ring body opposite to the opening end.

And (2) arranging 1-a plurality of positioning blocks matched and positioned with the grooves on the wall of the piston ring groove on the inner side of the piston ring body, or arranging the grooves on the piston ring body and arranging the lugs matched and positioned with the grooves on the piston ring.

According to the invention, through the design of the open-end airflow sealing structure and the measures of the positioning block, the sealing performance of the piston ring is greatly improved, the air blow-by amount is reduced, the efficiency of the internal combustion engine is improved, the oil consumption is reduced, and the service life of the engine is prolonged.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a right side view of fig. 1.

Detailed Description

A piston ring for an internal combustion engine comprises a piston ring body 1, wherein an air flow sealing structure for sealing an opening end gap is arranged at an opening end of the piston ring body; the air flow sealing structure comprises a protruding body 2 integrated with one end of the opening end of the piston ring body, and a clamping groove clamped with the protruding body is formed in the other end of the opening end of the piston ring body.

The protrusion and the clamping groove are matched in a Z shape (observed along the radial direction), or in an N shape, a W shape and the like.

On the piston ring body, a positioning structure matched and positioned with the groove wall of the piston ring is arranged. The piston ring body is provided with 1-a plurality of cylindrical positioning blocks 3 which are matched and positioned with the grooves on the groove wall of the piston ring, or the piston ring body is provided with the grooves and the groove wall of the piston ring is provided with the lugs which are matched and positioned with the grooves.

The piston ring is fixed in the piston ring groove by the grooves formed in the groove walls of the positioning block and the piston ring, and the piston ring is limited to rotate in a large range in the circumferential direction, so that the piston ring and the cylinder wall form a stable running-in surface, and the sealing performance is improved. The clamping groove at the opening end of the piston ring forms a closed sealing structure during working, so that the abrasion and cylinder scuffing phenomena on the cylinder wall caused by the piston ring with an opening relative to a common piston ring with an opening can be reduced, the phenomena of gas blowby and oil leakage are obviously reduced, and the cylinder pressure is improved, thereby improving the thermal efficiency of an engine, reducing the consumption of engine oil, and reducing the emission of CO, NOx and harmful particles.

Claims

1. The utility model provides a piston ring for internal-combustion engine, includes the piston ring body, characterized by: an air flow sealing structure for sealing the gap of the opening end is arranged at the opening end of the piston ring body; the air flow sealing structure comprises a protruding body integrated with one end of the opening end of the piston ring body, and a clamping groove clamped with the protruding body is formed in the other end of the opening end of the piston ring body.

2. The piston ring according to claim 1, wherein: the protruding body is matched with the clamping groove in a Z shape.

3. The piston ring according to claim 1 or 2, wherein: and a positioning structure which is matched and positioned with the groove wall of the piston ring is arranged on the inner side of the piston ring body.

4. The piston ring according to claim 3, wherein: the piston ring body is provided with 1-a plurality of positioning blocks which are matched and positioned with the grooves on the groove wall of the piston ring, or the piston ring body is provided with the grooves and the groove wall of the piston ring is provided with the lugs which are matched and positioned with the grooves.