CN2184790Y

CN2184790Y - Combined piston ring

Info

Publication number: CN2184790Y
Application number: CN 94206888
Authority: CN
Inventors: 谭军
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-18
Filing date: 1994-03-18
Publication date: 1994-12-07
Anticipated expiration: 2004-03-18

Abstract

The utility model relates to a combined piston ring which is used on a piston machine. The combined piston ring comprises a main ring and an auxiliary ring. When the main ring and the auxiliary ring are mutually overlaid to be combined in an axial direction, the clearances of the end parts of the main ring and the auxiliary ring are mutually staggered to form a certain angle. The clearances of the end parts are sealed and covered. The end part of the main ring is provided with a groove. A dummy club which is inwards extended out in a radial direction is engaged with the groove of the end part of the main ring on the inner side wall that the auxiliary ring is far from the end part thereof, which constitutes a circumferential direction positioning device between the main ring and the auxiliary ring. The combined piston ring has the advantages of simple structure, convenient processing, good sealing performance and longer service life. The utility model can be used in piston machines and other similar machines.

Description

Combined piston ring

Described in the utility model is a kind of compound piston ring that is used for piston machine such as internal-combustion engine and air compressor, particularly relates to the compound piston ring that has circumferential positioning device on a kind of main ring and the inner loop respectively.

In existing all kinds piston 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 the constantly increase with wear of piston-rings of its tip-clearance, make the gas leakage oil leakage phenomenon in gap serious, cause that the piston machine Operational Limits worsens, can't continue to use to cause piston.At application number is in the disclosed a kind of dicyclo complementary piston ring of utility model patent of 90211445X, certain angle of circumference is also hidden by two ring bodies respectively mutually though the tip-clearance of two ring bodies is separated by, but owing to do not have circumferential positioning device between two ring bodies of this multiple-piece piston-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.And be in the disclosed compound piston ring of utility model patent of 93215008X at application number, though the tip-clearance of main ring and inner loop is along the several angle that circumferentially staggers mutually, and it can not be rotated mutually by circumferential positioning device, but because its structure of circumferential positioning device between main ring and the inner loop is comparatively complicated, be difficult for processing, make the cost of piston ring higher.

The purpose of this utility model is to overcome the existing existing defective of piston ring, and provide a kind of be used for reciprocating machine, simple in structure, be convenient to process, cost is lower, the compound piston ring of good seal performance.

Compound piston ring described in the utility model 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 are respectively by the sealing that ring body hides of inner loop and main ring, has circumferential positioning device between main ring and the inner loop, it is characterized in that the circumferential positioning device between main ring and the inner loop includes, be positioned at the groove of main ring end and be positioned on the inner loop interior sidewall surface, away from inner loop end, footpath boss that inwardly stretch out and that be meshed with the main ring end recesses.

Compound piston ring described in the utility model, certain angle of circumference 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 since its circumferential positioning device by the groove that is positioned at the main ring end be positioned at the boss that inner loop body interior sidewall surface radially inwardly stretches out and formed, thereby it is simple in structure, easy to process, cost is lower.Compound piston ring good seal performance described in the utility model can improve the efficient of piston machine, strengthens the acting ability, prolongs the working life of piston ring, has bigger economic benefit.

Fig. 1 is a kind of conceptual scheme of compound piston ring described in the utility model;

Fig. 2 is the another kind of conceptual scheme of compound piston ring described in the utility model;

Fig. 3 is the main ring view of compound piston ring shown in Figure 1;

Fig. 4 is the inner loop view of compound piston ring shown in Figure 1;

Fig. 5 is the main ring view of compound piston ring shown in Figure 2.

Now in conjunction with the accompanying drawings, and by with embodiment, compound piston ring described in the utility model is described in detail.

Fig. 1 and Fig. 2 are respectively the conceptual scheme of compound piston ring described in the utility model.This compound piston ring includes 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 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, in order to prevent rotation mutually between main ring 1 and the inner loop 2, it is characterized in that the circumferential positioning device 5 between main ring 1 and the inner loop 2 includes, be positioned at the groove 6 of main ring 1 end, with be positioned on inner loop 2 interior sidewall surface, away from inner loop 2 ends, the boss 7 that warp-wise inwardly stretches out and is meshed with main ring 1 end recesses 6, when main ring 1 and inner loop 2 mutually axially during stack combinations, groove 6 is meshing with each other with boss 7, makes between main ring 1 and the inner loop 2 and can not rotate mutually, and can play certain axial seal effect.

Fig. 3 is the main ring view of compound piston ring shown in Figure 1.This main ring 1 includes and is connected as a single entity, and its cross section is respectively the big ring 8 and the little ring 9 of rectangle, encircle greatly 8 and the internal diameter of little ring 9 equate that main ring 1 has the cut one section girth in little ring 9 ends that a tip-clearance 3 is positioned at gap 3 one sides, constitute groove 6.

Fig. 4 is the inner loop view of compound piston ring shown in Figure 1.These inner loop 2 its cross sections are rectangle, its external diameter equates with the external diameter of the big ring 8 of main ring 1, its internal diameter equates with the external diameter of the little ring 9 of main ring 1, its axial thickness equates with the axial thickness of the little ring 9 of main ring 1, on interior sidewall surface away from the end of inner loop 2, preferably and the gap 11 of inner loop 2 be separated by on the interior sidewall surface of 180 ° of angles of circumference, radially inwardly be extended with a boss 7, the radial height of this boss 7 and circumferential lengths, be less than or equal to the radial thickness and the circumferential width of the groove 6 on the circumference of the little ring 9 that is positioned at main ring 1 respectively, the axial thickness of boss 7 equals the axial thickness of little ring 9.

Fig. 5 is the main ring view of compound piston ring shown in Figure 2.The main distinction of itself and main ring 1 shown in Figure 3 is, is positioned at the two ends of little ring 9 of the both sides in main ring 1 gap 3, and cut one section girth constitutes groove 6 respectively.

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

Claims

1, a kind of built-up piston that is used for piston ring machinery, 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) 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), it is characterized in that the circumferential positioning device (5) between main ring (1) and the inner loop (2) includes, be positioned at the groove (6) of main ring (1) end and be positioned on inner loop (2) interior sidewall surface, away from inner loop (2) end, the boss (7) that radially inwardly stretches out and be meshed with the end recesses (6) of main ring (1).

2, according to the described compound piston ring of claim 1, it is characterized in that main ring (1) includes is connected as a single entity, its cross section is respectively the big ring (8) and the little ring (9) of rectangle, the internal diameter of big ring (8) and little ring (9) equates, inner loop 2 its cross sections are that rectangle, its external diameter and internal diameter equate that with main ring master's (1) the big ring (8) and the external diameter of little ring (9) its axial thickness equates with the thickness of little ring (9) respectively.

3,, it is characterized in that being positioned at the groove (6) of main ring (1) end, by constituting from little ring (9) the end one section girth of excision that is positioned at main ring (1) gap (3) one sides according to the described compound piston ring of claim 2.

4, according to the described compound piston ring of claim 2, it is characterized in that being positioned at the groove (6) of main ring (1) end, by the two ends from the little ring (9) that is positioned at both sides, main ring (1) gap (3), cut respectively one section girth constitutes.

5, according to the described compound piston ring of one of claim 1 to 4, the radial height and the circumferential lengths that it is characterized in that boss (7), be less than or equal to respectively groove (8) on the circumference of the little ring (9) that is positioned at main ring (1) radial thickness and circumferential width, the axial thickness of boss (7) equals the axial thickness of little ring (9).

6,, it is characterized in that boss (9) is positioned at gap (11) with inner loop (2) the 180 ° of angles of circumference of being separated by according to the described compound piston ring of claim 5.