CN2160763Y

CN2160763Y - Combined piston ring

Info

Publication number: CN2160763Y
Application number: CN 93215008
Authority: CN
Inventors: 谭军
Original assignee: Tan Shengquan
Current assignee: Tan Shengquan
Priority date: 1993-06-23
Filing date: 1993-06-23
Publication date: 1994-04-06
Anticipated expiration: 2003-06-23

Abstract

The utility model relates to a combined piston ring used for a piston machine, which comprises a main ring and an auxiliary ring. When the main ring and the auxiliary ring are overlapped and combined in the axial direction, gap on the top of the main ring and the auxiliary ring is mutually staggered to form a definite angle. The gap on the top of the main ring and the auxiliary ring is mutually covered and sealed. Simultaneously, a circumferential direction positioning device is arranged between the main ring and the auxiliary ring. The piston ring has better sealing property and can improve the property of the piston machine with the advantage of long service life. The piston ring can be used for piston machines, such as an internal combustion engine, an air compressor, and other similar machines.

Description

Combined piston ring

The utility model is a kind of piston ring that is used for piston machine such as internal-combustion engine and air compressor, particularly relates to a kind of compound piston ring.

In existing all kinds reciprocating machine such as internal-combustion engine and air compressor, the sealing piston ring that is adopted is single ring body.Because this kind piston ring has the tip-clearance, and its tip-clearance constantly increases with wear of piston-rings, because the gas leakage oil leakage phenomenon in gap is serious, causes that the piston machine Operational Limits worsens, and must change to cause piston ring not use.Being head it off, is in the utility model patent of 90211445.X at application number, proposes a kind of dicyclo complementary piston ring.The major technique characteristics of this piston ring are that it includes and has identical outer warp, and by a superimposed main ring body and the inner loop body combined of axial end, the tip-clearance of two ring bodies certain angle of circumference of being separated by makes it to be covered in by two ring bodies respectively.But owing to do not have circumferential positioning device between two ring bodies of this ring, therefore can produce relative rotation between the major and minor ring body, in service at piston machine, because main ring body and inner loop body rotate mutually, when its tip-clearance mutually near or when overlapping, its gap still can produce serious gas leakage oil leakage phenomenon, can't normally move to cause piston machine.

The purpose of this utility model is to overcome the existing existing defective of piston ring, provides a kind of reciprocating machine that is used for as internal-combustion engine and air compressor, the compound piston ring of favorable sealing property.

Multiple-piece piston-ring major technique characteristics described in the utility model are, this piston ring includes main ring, inner loop, main ring and inner loop are combined by its axial end mutual superposition, the tip-clearance of main ring and the tip-clearance of inner loop, respectively by the sealing that ring body hides of inner loop and main ring, have circumferential positioning device between main ring and the inner loop, rotate mutually to prevent main ring and inner loop.

The major advantage of multiple-piece piston-ring described in the utility model is, certain circumference angle is arranged owing to stagger mutually in the main ring of this compound piston ring of composition and the tip-clearance of inner loop, make above-mentioned gap be hidden sealing by inner loop and main ring ring body respectively, and make it and to rotate mutually by circumferential positioning device, therefore this piston ring packing performance is good, can improve the efficient of piston machine, strengthen capacity for work, prolong the working life of piston ring, thereby reduced operation and maintenance expenses, have bigger economic benefit.

Fig. 1 is multiple-piece piston-ring figure described in the utility model;

Fig. 2 is the main ring figure of multiple-piece piston-ring described in the utility model;

Fig. 3 is the inner loop figure of multiple-piece piston-ring described in the utility model.

Now in conjunction with the accompanying drawings, by embodiment multiple-piece piston-ring described in the utility model is described in detail.

Fig. 1 is multiple-piece piston-ring figure described in the utility model.This multiple-piece piston-ring includes main ring (1), inner loop (2), main ring (1) is combined by its axial end mutual superposition with inner loop (2), the tip-clearance (3) of main ring (1) and the tip-clearance (4) of inner loop (2) are respectively by the sealing that ring body hides of inner loop (2) and main ring (1), has circumferential positioning device (5) between main ring (1) and the inner loop (2), to prevent rotation mutually between main ring (1) and the inner loop (2).Circumferential location (5) between main ring (1) and the inner loop (2), include and be positioned at the groove (8) on main ring (1) ring body and be positioned at boss (9) on inner loop (2) interior sidewall surface, when main ring (1) and inner loop (2) mutually axially during stack combinations, groove (8) is meshing with each other with boss (9), and main ring (1) and inner loop (2) can not be rotated mutually.

Fig. 2 is the main ring figure of multiple-piece piston-ring described in the utility model.This main ring (1) includes and is connected as a single entity, its cross section is respectively the big ring (6) and the little ring (7) of brachmorphy, warp equates in big ring (6) and the little ring (7), main ring (1) has a tip-clearance (3), at distance tip-clearance (3) certain angle of circumference, be preferably on the circumference of little ring (7) of main ring (1) of 180 ° of angles of circumference of square, have a groove (8).

Fig. 3 is the inner loop figure of multiple-piece piston-ring described in the utility model.Its cross section of this inner loop (2) is a rectangle, its external diameter equates with the external diameter of the big ring (6) of main ring (1), its internal diameter equates with little ring (7) external diameter of main ring (1), its axial thickness equates with the axial thickness of the little ring (7) of main ring (1), on inner loop (2) interior sidewall surface, be preferably on the interior sidewall surface of an end of this ring and radially inwardly stretch out a boss (9), the radial height and the circumferential lengths of this boss (9), be less than or equal to the radial thickness and the circumferential width of the groove (8) on little ring (7) circumference that is positioned at main ring (1) respectively, the axial thickness of boss (9) equates with the axial thickness of little ring (7).

Compound piston ring described in the utility model except that being used for reciprocating machine such as internal-combustion engine and air compressor, also is suitable for the to-and-fro motion machinery of the needs of other types sealing.

Claims

1, a kind of compound piston ring that is used for piston machine, include main ring (1), inner loop (2), main ring (1) and inner loop (2) are combined by its axial end mutual superposition, the tip-clearance (3) of main ring (1) and the tip-clearance (4) of inner loop (2), hidden sealing by the ring body of inner loop (2) and main ring (1) respectively, it is characterized in that having circumferential positioning device (5) between main ring (1) and the inner loop (2), to prevent rotation mutually between main ring (1) and the inner loop (2).

2, according to the described compound piston ring of claim 1, it is characterized in that, main ring (1) includes and is connected as a single entity, its cross section is respectively the big ring (6) and the little ring (7) of rectangle, the internal diameter of this ring (6) and ring (7) equates, its cross section of inner loop (2) is a rectangle, and its external diameter and internal diameter equate that with the big ring (6) of main ring (1) and the external diameter of little ring (7) its axial thickness equates with the axial thickness of little ring (7) respectively.

3, according to claim 1 or 2 described compound piston rings, it is characterized in that the positioning device (5) between main ring (1) and the inner loop (2), include and be positioned at the groove (8) on main ring (1) ring body and be positioned at boss (9) on inner loop (2) interior sidewall surface, axially the stack unit is fashionable mutually with inner loop (2) when main ring (1), and groove (8) is meshing with each other with boss (9).

4, according to the described compound piston ring of claim 3, it is characterized in that groove (8) is positioned on the circumference of little ring (7) of main ring (1), and with the tip-clearance (3) of main ring (1) 180 ° of angles of circumference of square mutually, boss (9) is positioned on the end interior sidewall surface of inner loop (2).

5, according to the described compound piston ring of claim 4, the radial height and the circumferential lengths that it is characterized in that boss (9), the radial thickness and the circumferential width that are less than or equal to groove (8) respectively, the axial thickness of boss (9) equates with the axial thickness of little ring (7).