CN216242235U - Combined piston ring - Google Patents
Combined piston ring Download PDFInfo
- Publication number
- CN216242235U CN216242235U CN202122765604.3U CN202122765604U CN216242235U CN 216242235 U CN216242235 U CN 216242235U CN 202122765604 U CN202122765604 U CN 202122765604U CN 216242235 U CN216242235 U CN 216242235U
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- ring
- supporting
- supporting part
- supporting parts
- oil return
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A combined piston ring relates to the field of piston rings and comprises a liner ring and two scraping pieces, wherein the scraping pieces are in an open ring shape, the liner ring is in an open ring shape, and the liner ring is arranged between the two scraping pieces; the liner ring is composed of a plurality of first supporting parts and a plurality of second supporting parts, the first supporting parts are rectangular with one open end, the opening direction of the first supporting parts faces the circle center of the liner ring, the inner cavity of the first supporting parts is an oil return cavity, and the first supporting parts are provided with oil return holes communicated with the oil return cavity; the second supporting part is in a cross shape, the second supporting part is arranged between two adjacent first supporting parts, two ends of the second supporting part are integrally arranged with the corresponding first supporting parts respectively, and the other two ends of the second supporting part are in contact with the corresponding scraping blades respectively. The utility model has more oil return channels formed by the first supporting part and the second supporting part, smooth oil return, small contact surface between the scraping blade and the lining ring, reduced friction between the scraping blade and the two end surfaces of the lining ring and prolonged service life.
Description
Technical Field
The present invention relates to the field of piston rings.
Background
The prior combined piston ring generally adopts a three-piece oil ring, wherein an upper piece and a lower piece are scraper rings, a lining ring is arranged in the middle, when a piston moves, the scraper rings are tightly attached to the wall of a cylinder by the pressure applied to the scraper rings by the lining ring, redundant lubricating oil is scraped from the cylinder, and oil return is ensured by the waveform structure of the lining ring. This structure has the following drawbacks: 1. the contact area of the combined end face of the scraping blade and the lining ring is large, friction is increased during working, the scraping blade is easy to wear and thin, and sealing failure and oil leakage are caused. 2. The oil is returned by the aid of the waveform of the lining ring, and the oil is not smooth enough.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a combined piston ring which has smooth oil return, convenient installation and good sealing property.
The purpose of the utility model is realized as follows: the combined piston ring comprises a liner ring and two scraping pieces, wherein the scraping pieces are in an open ring shape, the liner ring is in an open ring shape, and the liner ring is arranged between the two scraping pieces; the liner ring is composed of a plurality of first supporting parts and a plurality of second supporting parts, the first supporting parts are rectangular with one open end, the opening direction of the first supporting parts faces the circle center of the liner ring, the inner cavity of the first supporting parts is an oil return cavity, and the first supporting parts are provided with oil return holes communicated with the oil return cavity; the second supporting part is in a cross shape, the second supporting part is arranged between two adjacent first supporting parts, two ends of the second supporting part are integrally arranged with the corresponding first supporting parts respectively, and the other two ends of the second supporting part are in contact with the corresponding scraping blades respectively.
The oil return device has the advantages that the oil return channels formed by the first supporting part and the second supporting part are more, the oil return is smooth, the circumferential movement can be avoided, the friction is reduced, the abrasion is reduced, the sealing effect is ensured, and the oil leakage phenomenon is avoided. The contact surface of the scraping piece and the lining ring is small, the friction between the scraping piece and the two end surface forces of the lining ring is reduced, the abrasion between the scraping piece and the two end surface forces of the lining ring is reduced, and the service life is prolonged.
According to the utility model, the two sides of the axial height of the first supporting part are respectively and integrally provided with the limiting edges, the limiting edges are arranged at the opening end of the first supporting part, and the inner edge of the scraping piece is arranged on the limiting edges, so that the installation is convenient.
The outer edge of the wiper blade of the present invention extends beyond the outer edge of the first support.
The surface of the second supporting part contacting with the scraping blade is an arc surface, so that point contact is formed, and the contact surface is further reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view from a-a in fig. 1.
Fig. 3 is a top view of fig. 1.
Fig. 4 is a schematic structural view of the liner ring.
Fig. 5 is a right side view of fig. 4.
Detailed Description
As shown in fig. 1 to 3, the combined piston ring comprises a liner ring 2 and two wiper blades 1, wherein the wiper blade 1 is in an open ring shape, the liner ring 2 is in an open ring shape, and the liner ring 2 is arranged between the two wiper blades 1.
As shown in fig. 4 and 5, the backing ring 2 is composed of a plurality of first supporting portions 21 and a plurality of second supporting portions 22, the first supporting portions 21 are rectangular with an open end, the opening direction of the first supporting portions 21 faces the center of the backing ring 3, the inner cavity of the first supporting portions 21 is an oil return cavity 23, and the first supporting portions 21 are provided with oil return holes 24 communicated with the oil return cavity 23. The two sides of the axial height of the first supporting part 21 are respectively and integrally provided with a limiting edge 25, and the limiting edges 25 are arranged at the opening end of the first supporting part 21. The inner edge of the wiper blade 1 is arranged on the limit edge 25, and the outer edge of the wiper blade 1 extends beyond the outer edge of the first support part 21.
The second supporting portion 22 is cross-shaped, the second supporting portion 22 is arranged between two adjacent first supporting portions 21, two ends of the second supporting portion 22 are respectively arranged integrally with the corresponding first supporting portions 21, the other two ends of the second supporting portion 22 are respectively arranged in contact with the corresponding doctor blades 1, the surfaces of the second supporting portions 22 contacting the doctor blades 1 are cambered surfaces, point contact is formed, and the contact area is small.
Claims (4)
1. The combined piston ring comprises a liner ring and two scraping pieces, wherein the scraping pieces are in an open ring shape, the liner ring is in an open ring shape, and the liner ring is arranged between the two scraping pieces; the method is characterized in that: the liner ring is composed of a plurality of first supporting parts and a plurality of second supporting parts, the first supporting parts are rectangular with one open end, the opening direction of the first supporting parts faces the circle center of the liner ring, the inner cavity of the first supporting parts is an oil return cavity, and the first supporting parts are provided with oil return holes communicated with the oil return cavity; the second supporting part is in a cross shape, the second supporting part is arranged between two adjacent first supporting parts, two ends of the second supporting part are integrally arranged with the corresponding first supporting parts respectively, and the other two ends of the second supporting part are in contact with the corresponding scraping blades respectively.
2. The assembled piston ring as set forth in claim 1, wherein: the two sides of the axial height of the first supporting part are respectively and integrally provided with a limiting edge, the limiting edges are arranged at the opening end of the first supporting part, and the inner edge of the scraping blade is arranged on the limiting edges.
3. The assembled piston ring as set forth in claim 1, wherein: the outer edge of the scraping blade extends out of the outer edge of the first supporting part.
4. The assembled piston ring as set forth in claim 1, wherein: the surface of the second supporting part contacting with the scraping blade is an arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122765604.3U CN216242235U (en) | 2021-11-12 | 2021-11-12 | Combined piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122765604.3U CN216242235U (en) | 2021-11-12 | 2021-11-12 | Combined piston ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216242235U true CN216242235U (en) | 2022-04-08 |
Family
ID=80996333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122765604.3U Active CN216242235U (en) | 2021-11-12 | 2021-11-12 | Combined piston ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216242235U (en) |
-
2021
- 2021-11-12 CN CN202122765604.3U patent/CN216242235U/en active Active
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |