CN2227765Y

CN2227765Y - Ladder-shape piston ring

Info

Publication number: CN2227765Y
Application number: CN95220126U
Authority: CN
Inventors: 邵子玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-24
Filing date: 1995-08-24
Publication date: 1996-05-22
Anticipated expiration: 2005-08-24

Abstract

The utility model relates to an automotive piston ring, composed of a cylinder jacket, a piston, a piston ring and a corrugated groove. The utility model is characterized in that the corrugated groove is arranged on the contacted surfaces of the piston ring and the cylinder jacket; the included angle between the backlash surface and the contacted surface of the trapezoidal piston ring and the cylinder jacket is a circular arc angle. Because the corrugated groove is arranged on the piston ring, an oil layer can be formed between the surfaces of the piston ring and the cylinder jacket, which are contacted, the dry wear between the piston ring and the cylinder jacket can be prevented. The utility model has the advantages that tightness performance is good, gas carry-over can be prevented, and power and service life of engines can be increased manyfold.

Description

A kind of keystone-type piston ring

The utility model relates to a kind of automobile-use piston ring, belongs to engine application technical field on the Motor Vehicle.

At present, piston ring on the engine piston, be divided into rectangular cross-section ring, inclined plane ring, twist type ring and keystone ring according to its structure or shape, their common defectives are that piston ring and the contacted face of cylinder sleeve are the mirror plane, are difficult for by " wedge oil ", form dry wear, influence the degree of being adjacent to of piston ring and casing wall, cause gas blowby, form carbon deposit, make being short of power of motor, and have shortcomings such as fuel consumption is big.

The purpose of this utility model is to overcome defective of the prior art, provides a kind of making between piston ring and the casing wall can form sealing, nonabradable piston ring well.

The purpose of this utility model is achieved in that it is a kind of keystone ring, with piston ring surface that cylinder sleeve contacts on be provided with wave groove, in addition, face that keystone-type piston ring is contacted with cylinder sleeve and the angle between the side relief are designed to arc round angle.

Advantage of the present utility model is, because after piston ring is provided with wave groove, make between contacted of piston ring and the cylinder sleeve and can form an oil film, prevented the dry wear between piston ring and the cylinder sleeve, thereby good seal performance, prevent gas blowby, can increase the power and the working life of motor exponentially.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is the utility model mounting structure schematic representation;

Fig. 2, Fig. 3, Fig. 4 are the pistons work phase diagram.

Among the figure: cylinder sleeve--1, piston--2, piston ring--3, wave groove--4.

This improved keystone-type piston ring is provided with wave groove 4 on 3 in the piston ring that contacts with cylinder sleeve 1, face that contacts with cylinder sleeve 1 on the piston ring 3 and the angle between the side relief are arc round angle.When piston 2 up compressions, as shown in Figure 2, the arc round angle of piston ring 3 can access small part machine oil, and fluid is distributed on the circular arc, make and produce desirable oil film on piston ring 3 and cylinder sleeve 1 surface of contact, when piston 2 is up to the compression terminal point, the in-cylinder combustion work done, piston 2 tops and keystone ring are subjected to the impact of high temperature and high pressure gas, piston 2 begins to move downward, at this moment, the movement velocity of piston does not have the striking velocity of pressurized gas fast, the bottom of piston ring 3 still contacts with the piston ring groove bottom, when the striking velocity of the movement velocity of piston and high temperature and high pressure gas is identical, piston ring 3 is in a reposition, as shown in Figure 3, this state time is very short, but the machine oil in the piston ring groove still can make machine oil upgrade by the impact of gas, when gas does not also have enough time to flow into the annular groove bottom, the top of piston ring 3 contacts with the top of piston ring groove, as shown in Figure 4, prevented gas blowby, in the machine oil exchange process, owing to there is arc round angle, the machine oil that is heated is in time exchanged, and energy descending " wedge oil ", piston ring 3 is subjected to the impact of high temperature and high pressure gas, make between piston ring 3 and cylinder sleeve 1 wall and be adjacent to more, but because piston ring 3 is provided with wave groove 4 and has stored small amount of engine oil, avoided dry grinding, prolonged the working life of motor.

Claims

1, a kind of keystone-type piston ring, by cylinder sleeve, piston, piston ring and wave groove constitute, and it is characterized in that has wave groove (4) on piston ring (3) and the face that cylinder sleeve (1) contacts.

2, keystone-type piston ring according to claim 1 is characterized in that it is arc round angle that keystone-type piston ring (3) is gone up the face and the angle between the side relief that contact with cylinder sleeve (1).