CN2186827Y

CN2186827Y - Combined piston ring

Info

Publication number: CN2186827Y
Application number: CN 94203088
Authority: CN
Inventors: 谭军
Original assignee: Tan Shengquan
Current assignee: Tan Shengquan
Priority date: 1994-02-07
Filing date: 1994-02-07
Publication date: 1995-01-04
Anticipated expiration: 2004-02-07

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 mutually overlapped and combined in the axial direction, notches of the main ring and the auxiliary ring are mutually staggered to form definite angles. The notches of the main ring and the auxiliary ring are mutually covered. Simultaneously, a circumferential direction positioning device is arranged between the main ring and the auxiliary ring. The positioning device is composed of a lug boss on the main ring and a notch which is positioned on the auxiliary ring and is matched with the lug boss. The utility model can be used for an internal combustion engine and an air compressor with the advantages of simple structure, easy manufacture, good tightness, and long service life.

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 otch, and its otch constantly increases with wear of piston-rings, because the gas leakage oil leakage phenomenon of otch 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 same outer diameter as, and by a superimposed main ring body and the inner loop body combined of axial end, and the otch 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 otch 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 applicant applied on June 23rd, 1993,93215008.X " compound piston ring " patent of the power of now having patented, owing to adopted " otch of main ring and inner loop is along the circumference several angle that staggers; above-mentioned otch is hidden by inner loop and main ring ring body respectively; and make it and can not rotate mutually by circumferential positioning device " technological scheme, and improved piston ring packing, improved the efficient of piston machine.But have groove on the little ring body because of its main ring, be shaped on boss on the interior sidewall surface of inner loop, structure is complicated, and manufacture cost is higher.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of compound piston ring simple in structure, easy to manufacture is provided.

Technical solution of the present utility model is as follows:

A kind of compound piston ring that is used for piston machine, include main ring, inner loop, main ring includes and is connected as a single entity, its cross section is respectively the big ring and the little ring of rectangle, the internal diameter of big ring and little ring equates, its cross section of inner loop is a rectangle, its external diameter and internal diameter equate with the big ring of main ring and the external diameter of little ring respectively, its axial thickness equates with the axial thickness of little ring, main ring and inner loop have been combined in by its axial end mutual superposition, the otch of main ring and inner loop otch are hidden by the ring body of inner loop and main ring respectively, circumferential positioning device is arranged between main ring and the inner loop, described circumferential positioning device is made up of the otch with matching on boss on the main ring and the inner loop, the axial end of the axial end of described boss and the little ring of main ring is in the same plane, the radius of curvature of its peripheral surface be equal to or less than main ring big ring external diameter 1/2nd.

The utility model compound piston ring, owing to only need on main ring, to make boss when its circumferential positioning device is made, otch on the inner loop strengthened to match with it get final product, thereby its structure and manufacturing process are all simple than the 93215008.X patent that patenting of the applicant weighed, cost is low.

Other advantages of the present utility model and details can be cheer and bright by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings, wherein:

Fig. 1 is a compound piston ring structural representation described in the utility model;

Fig. 2 is the main ring structural representation of compound piston ring described in the utility model;

Fig. 3 is the inner loop structural representation of compound piston ring described in the utility model.

With reference to Fig. 1.Fig. 1 is a compound piston ring structural representation described in the utility model.This compound 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 otch 3 of main ring 1 and the otch 4 of inner loop 2 are hidden by the ring body of inner loop 2 and main ring 1 respectively, has circumferential positioning device between main ring 1 and the inner loop 2, to prevent rotation mutually between main ring 1 and secondary 2.Circumferential positioning device between main ring 1 and the inner loop 2 includes boss 5 that is positioned on main ring 1 ring body and the otch 4 that is positioned on the inner loop 2, when main ring 1 and inner loop 2 mutually axially during stack combinations, otch 4 is meshing with each other with boss 5, and main ring 1 and inner loop 2 can not be rotated mutually.

Fig. 2 is the main ring structural representation of compound 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 rectangle, big ring 6 and little ring 7 internal diameters equate, main ring 1 has a kerf 3, one boss 5 is being arranged on the position of the certain angle of circumference of otch, the axial end 9 of boss 5 and the axial end of little ring 7 are in the same plane, and the radius of curvature of the peripheral surface 8 of boss 5 equals also can be less than 1/2nd of the external diameter of big ring 6.The position of boss 5 preferably be arranged in the radially symmetrical position of otch 3 on.

Fig. 3 is the inner loop structural representation of compound piston ring described in the utility model.Inner loop 2 its cross sections are rectangle, and its external diameter equates that with the external diameter of the big ring 6 of main ring 1 its internal diameter equates that with little ring 7 external diameters of main ring 1 its axial thickness equates with the axial thickness of the little ring 7 of main ring 1.Otch 4 on the inner loop matches with boss 5 on the main ring 1, and its circumferential lengths equates with the circumferential lengths of boss 5, perhaps is slightly larger than the circumferential lengths of boss 5.

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.It is simple in structure, and is easy to manufacture, has better seal, can improve the performance of piston machine, has long working life.

Claims

1, a kind of compound piston ring that is used for piston machine, include main ring (1), inner loop (2), 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 big ring (6) and little ring (7) equates, its cross section of inner loop (2) is a rectangle, its external diameter and interiorly equate with the big ring (6) of main ring (1) and the external diameter of little ring (7) respectively, its axial thickness equates with the axial thickness of little ring (7), main ring (1) and inner loop (2) are combined by its axial end mutual superposition, the otch (3) of main ring (1) and the otch (4) of inner loop (2) are hidden by the ring body of inner loop (2) and main ring (1) respectively, has circumferential positioning device between main ring (1) and the inner loop (2), it is characterized in that described circumferential positioning device is made up of boss (5) on the main ring (1) and the otch with matching (4) on the inner loop (2), the axial end of the axial end (9) of described boss (5) and the little ring (7) of main ring (1) is in the same plane, the radius of curvature of its peripheral surface (8) be equal to or less than main ring (1) big ring (6) external diameter 1/2nd.

2,, it is characterized in that the position radial symmetric of the otch (3) of the basic and main ring (1) in the position of described boss (5) according to the described compound piston ring of claim 1.

3,, it is characterized in that the circumferential lengths of the otch (4) of described inner loop (2) equates with the circumferential lengths of described boss (5) according to claim 1 or 2 described compound piston rings.