CN2381796Y

CN2381796Y - Combined piston ring

Info

Publication number: CN2381796Y
Application number: CN 99236183
Authority: CN
Inventors: 覃超永
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-31
Filing date: 1999-05-31
Publication date: 2000-06-07
Anticipated expiration: 2009-05-31

Abstract

The utility model discloses a combined air ring, comprising an upper and a lower rings fit in a step shape, and the openings of the upper and the lower rings are mutually staggered. Compared with an integral ring, the height of an opening gap of the utility model is lowered, air leakage quantity of an internal-combustion engine during operation is decreased, sealing performance is improved, compression ratio of a combustion chamber is enhanced, and combustion is more complete. Both horsepower of the internal combustion engine is enhanced and fuel oil is saved, and environmental pollution is reduced.

Description

A kind of combined gas ring

The utility model relates to a kind of piston ring that is used for reciprocating internal combustion engine, especially a kind of combined gas ring.

Traditional compression ring all is an integral loop.When piston in cylinder of internal-combustion engine during to-and-fro motion, combination gas meeting in the cylinder flows between casing wall and the piston in the crack from cylinder, gap between the upper side of upper side by piston ring and annular groove flows to the back gap of ring again, these accumulate in the gas at whole piston ring back, its unique effusion gas circuit is the compression ring opening, and promptly gas flows out to the cylinder wall of head-end compression ring below and the gap of piston by opened gap.As seen the main gas leakage approach of compression ring is its opening.Its air leakage can be represented with the opening area of ring, i.e. V=SH, V representative gas leakage area, the opened gap of S representative ring, the height of H representative ring.Along with cylinder sleeve, wear of piston-rings, the opened gap of ring increases gradually, and air leakage also increases thereupon, reduces the horsepower of internal-combustion engine, and increases oil consumption.

The purpose of this utility model is to provide a kind of cylinder of internal-combustion engine that can effectively reduce to leak gas, and the combined gas ring that increases the service life.

Compression ring of the present utility model comprises that stepped identical going up encircles and encircle down, and the opening of upper and lower ring staggers.

The opened gap of going up ring in the utility model axially and is radially being covered by following ring seal, and combustion gas just can not leaked by the opened gap place of last ring like this, and only may be from the opened gap leakage of ring down.And stepped the coincideing of upper and lower interannular employing, can guarantee the tightness at upper and lower engagement of loops place.Since down the height of ring low the height of whole piston ring, according to air leakage formula V=SH as can be known, air leakage of the present utility model is less than integral loop, if down ring highly have only whole ring height 1/3, air leakage also just has only 1/3 of integral loop so.So the utility model has better air-tightness, longer working life, the interior compression ratio of cylinder is improved a lot, thereby corresponding raising internal-combustion engine horsepower, starting also is more prone to, and make oil inflame abundant, not only the waste gas that causes because of incomplete combustion of fuel saving but also can reduce was to the pollution of environment.

Fig. 1 is a kind of embodiment's of the utility model a structural representation;

Fig. 2 is a structural drawing of going up ring among Fig. 1;

Fig. 3 is the structural drawing that encircles down among Fig. 1;

Fig. 4 is the plan view of Fig. 1.

As shown in Figure 1, the utility model comprises stepped identical going up ring 1 and encircle 2 down, and as Fig. 2, shown in Figure 3, the cross section of upper and lower ring can be " L " type that cooperatively interacts, and the junction of upper and lower like this ring is stepped, can improve the tightness of junction.As shown in Figure 4, the opening 3 on the upper and lower ring staggers mutually, and its angle the best that staggers is 180 °, and this is in order to prevent that in the working procedure of compression ring upper and lower ring displacement relatively makes the opening of upper and lower ring relative, causes gas leakage.

Claims

1, a kind of combined gas ring is characterized in that: comprise stepped identical going up ring (1) and encircle (2) down, the opening on the upper and lower ring (3) staggers mutually.

2, a kind of combined gas ring according to claim 1 is characterized in that: the cross section of going up ring (1) and following ring (2) is all L-shaped.

3, a kind of combined gas ring according to claim 1 and 2 is characterized in that: the opening on the upper and lower ring (3) the 180 ° of angles of staggering mutually.