CN2340919Y

CN2340919Y - Fully sealed piston ring

Info

Publication number: CN2340919Y
Application number: CN 98231394
Authority: CN
Inventors: 袁大学
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-24
Filing date: 1998-09-24
Publication date: 1999-09-29
Anticipated expiration: 2008-09-24

Abstract

The utility model relates to a fully sealed piston ring for an internal combustion engine cylinder, which is composed of an upper ring and a lower ring and an inner ring. The inner ring is arranged between a piston ring groove and an inner circle of the upper ring and the lower ring, and the height is the sum of the upper ring and the lower ring; the contact surface of the upper and the lower rings is not chamfer angle; the size of the outside diameter of the inner ring is smaller than the size of the outside diameter of the piston; an opening and the openings of the upper and the lower rings are arranged in the staggered 120 DEG mode. In the way, gas leakage passages on the opening parts of the sealing ring are completely blocked, the sealing property of the piston ring is increased, and simultaneously the power of the internal combustion engine is enhanced.

Description

Fully-sealed piston ring

The utility model relates to the internal combustion engine piston ring, particularly a kind of fully-sealed piston ring.

For internal combustion engine, piston ring packing performance quality has great influence to the complete machine performance, internal-combustion engine requires piston ring sealing fully in the course of the work, and at present used piston ring all can not reach this requirement, and along with the lengthening of service time, the increasing of wearing and tearing, its sealability is poorer, it is more serious to leak gas, and power of IC engine is descended, and oil consumption increases.And each piston ring has opening, and opening gas leakage is a main leakage path.

The purpose of this utility model provides a kind of fully-sealed piston ring.

Piston ring of the present utility model goes out three parts to be formed, and promptly upward encircles, encircles down and interior ring, and interior ring is between last ring and the following inner ring and piston ring groove that encircles, and it highly is last ring and encircles sum down; In the roughness of ring outer ring identical with upper and lower ring inner ring, interior ring inner ring precision is identical with upper and lower ring outer ring, and the surface of contact of upper and lower ring can not chamfering, interior ring opening and upper and lower ring opening stagger and 120 spend arrangement.Under free state, its outside diameter of inner ring size is than the slight 0.5-0.8mm of piston external diameter chi.

Fully-sealed piston ring of the present utility model owing to adopted interior ring and upper and lower ring structure, makes that seal ring opening leakage path is blocked, and sealability greatly improves.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the axial sectional view of the utility model.

Fig. 2 is the utility model A-A to sectional view radially.

1, piston 2, on encircle 3, encircle 4 down, interior ring

As shown in Figure 1 and Figure 2, fully-sealed piston ring of the present utility model by last ring 2, down encircle 3 and interior ring 4 form, interior ring 4 is between the inner ring and piston 1 annular groove of last ring 2 and ring 3 down, it highly be last ring 2 and following 3 sums of encircling; Under free state, ring 4 outside dimensions are than the little 0.5-0.8mm of piston in it; In the roughness of ring 4 outer rings with last ring 2, to encircle 3 inner rings down identical, interior ring 4 inner ring precision with last ring 2, to encircle 3 outer rings down identical, on encircle 2 with following 3 the surface of contact of encircling can not chamfering.During installation, interior ring 4 with last ring 2, encircling 3 opening down should be staggered, its best angle that staggers is 120 degree.

Piston ring of the present utility model, the opening leakage path is blocked, and its good seal performance has improved the working efficiency of internal combustion engine greatly.

Claims

1, a kind of internal combustion engine cylinder piston ring, particularly a kind of fully-sealed piston ring, it is characterized in that it is by last ring, down ring and interior ring are formed, interior ring is between the inner ring and piston ring groove of last ring and following ring, it highly is last ring and encircles sum down, the outside diameter of inner ring size is littler than piston external diameter, and interior ring opening and upper and lower ring opening are staggered.

2, piston ring according to claim 1, the roughness of ring outer ring is identical with upper and lower ring inner ring in it is characterized in that, and interior ring inner ring precision is identical with upper and lower ring outer ring.

3, piston ring according to claim 1 and 2 is characterized in that ring and the surface of contact of ring can not chamfering down.

4, piston ring according to claim 1 is characterized in that the outside diameter of inner ring size is than the little 0.5-0.8mm of piston external diameter.

5, piston ring according to claim 1, ring opening and the upper and lower ring opening 120 degree arrangements of staggering in it is characterized in that.