CN2221661Y

CN2221661Y - Piston ring

Info

Publication number: CN2221661Y
Application number: CN 94244642
Authority: CN
Inventors: 孙维荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-14
Filing date: 1994-11-14
Publication date: 1996-03-06
Anticipated expiration: 2004-11-14

Abstract

The utility model provides a piston ring. The peripheral face of the side of the piston ring is spherical surface. The maximum diameter of the piston ring is matched with the inner diameter of a cylindrical cylinder, and the diameter of the piston ring is the diameter of a sphere which the spherical surface of the outer side of the piston ring belongs to. When the utility model is used, the piston ring and the inner wall of the cylinder are in the higher pair line contact theoretically, the specific pressure of the surface is high, favorable sealability, running-in ability and lubricity exist between the piston ring and the cylinder, and thus the work efficiency of a reciprocating compressor or an internal combustion engine can be improved, so as to extend the service life of the reciprocating compressor or the internal combustion engine.

Description

A kind of piston ring

The utility model relates to a kind of piston ring.

Used piston ring all is a cylindrical sides in the machineries such as internal-combustion engine, reciprocal compressor at present, and its excircle side forms the contact of lower pair face in cylinder inner wall.This piston ring is in use because frictional force is bigger, and it is lubricated insufficient on the rubbing surface, power consumption is higher, being easy to wearing and tearing causes this class mechanical efficiency to reduce, simultaneously because in the piston proper motion, follow a kind of around with the swing of piston rod axis Vertical direction, the corner angle of piston ring scratch cylinder inner wall easily, influence its working life.

The purpose of this utility model is to improve the deficiencies in the prior art, provide a kind of and cylinder inner wall between lubricate, the little piston ring that weares and teares to improve the working efficiency of internal-combustion engine etc., prolongs its working life.

The purpose of this utility model is achieved in that the side of piston ring is a sphere, and the diameter that it is maximum and the internal diameter of cylinder are complementary, and this diameter also is the diameter of this sphere place, piston ring side spheroid.

This piston ring and existing tubular cylinder coupling are used, and are high by-pass contact therebetween in theory, be extremely narrow face contact in the practical application, thereby surperficial specific pressure are higher, sets up continuous potted line easily, guarantees high leak tightness, break-in easily simultaneously; In addition, the spherical side in the piston ring outside can not constitute corner angle with cylinder wall and contact, and cause cylinder wall to be scratched when piston ring is normally swung; Because contact formation one wedge gap between it for minimum face between piston ring and the cylinder wall, at piston ring during with reciprocating motion of the pistons, lubricant oil is engaging friction face successfully, guarantees good lubricity, and the unlikely abnormalities such as oil film interruption or local dry friction that occur.

The piston ring of spherical side of the present utility model also can cut at the angle on its sphere periphery, and the amount of cutting is advisable with the distortion appropriateness of protecting positive piston ring, thereby the piston ring peripheral upper portion becomes the conical surface, and this piston ring has warping property, is twist type ring.

This twist type ring is packed into and is become anti-twist behind the cylinder, and its conical surface one end is obviously downward-sloping, thereby makes it adapt to normal swing in the piston motion better.

The piston ring that the utility model provides because its side is sphere, and has good sealing property, running-in ability and lubricity in the contacting of cylinder inner wall, so can improve the working efficiency of reciprocal compressor or internal-combustion engine, prolongs its working life.

The utility model is described in further detail below by drawings and Examples.

Fig. 1: piston ring that the utility model provides and cylinder wall matching structure sectional view;

The partial enlarged drawing of Fig. 2: Fig. 1;

The plan view of Fig. 3: Fig. 1;

Fig. 4: an end is the piston ring structure sectional view of the conical surface on the sphere side.

Embodiment 1:

As shown in Figure 1, outer side surface 1-1 is that the piston ring 1 of sphere contacts for high by-pass in theory with cylinder 2 inwalls on the mounting point, be extremely narrow face contact in the practical application, the maximum diameter of piston ring 1 and the inwall of cylinder are complementary, and this diameter also is the diameter R of sphere place, piston ring 1 outside spheroid.

This piston ring is when moving upward with piston, and the wedge-shaped oil film that forms between itself and casing wall can make piston ring float off cylinder wall, thereby reduces the wearing and tearing of itself and casing wall.When piston ring moves downward with piston, do not draw together clean in the time of it can being moved upward and machine oil that remain on the casing wall is drawn together down, make piston ring on the oil film of new formation to lower slider.Because of piston ring side lower edge contacts with the non-corner angle of cylinder wall, so the new oil film that forms still can successfully enter between piston ring and the cylinder inner wall.

Embodiment 2:

As shown in Figure 4, be that the angle cuts on the piston ring of sphere with outer side surface, form piston ring 3 with one section circular cone outer side surface 3-1.Its hypomere side 3-2 still is a sphere, and the structure of this sphere is identical with embodiment 1.

Claims

1. piston ring, it is characterized in that: its outer side surface is a sphere, and the maximum diameter of piston ring and the internal diameter of cylinder are complementary, and this diameter also is the diameter of sphere side face place, described piston ring outside spheroid.

2. piston ring according to claim 1 is characterized in that: the top conical surface of the outside sphere side face of described piston ring, bottom still are sphere.