CN202707273U - Piston ring - Google Patents
Piston ring Download PDFInfo
- Publication number
- CN202707273U CN202707273U CN 201220361946 CN201220361946U CN202707273U CN 202707273 U CN202707273 U CN 202707273U CN 201220361946 CN201220361946 CN 201220361946 CN 201220361946 U CN201220361946 U CN 201220361946U CN 202707273 U CN202707273 U CN 202707273U
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- Prior art keywords
- piston ring
- chromium layer
- layer
- copper layer
- cylinder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a piston ring, which comprises a piston ring substrate, a chromium layer and a copper layer, wherein the chromium layer is coated on the outer circle of the piston ring substrate in an electrochemical deposition way; and the copper layer is coated on the outer surface of the piston ring substrate with the chromium layer in the electrochemical deposition way. The chromium layer and the copper layer form a combined coating with a gradient function, and the combined coating integrates the advantages of softness, good initial running-in characteristic and high sealing performance of the copper layer and high hardness and abrasion resistance of the chromium layer, so that the piston ring and a cylinder sleeve can be stably transitioned in an initial running-in stage and a normal running-in stage, cylinder scoring risks in a running-in period are reduced, and the service life of the piston ring is prolonged.
Description
Technical field
The utility model relates to a kind of piston ring.
Background technique
Piston ring is a kind of being applied in the to-and-fro motion machines such as internal-combustion engine, compressor, determine one of vital part of its performance, the effect of piston ring mainly is to keep sealing, suitable wiping off between piston and the cylinder wall to be attached to the machine oil on the cylinder wall, to keep oil consumption suitably, combusted gas generant high temperature is passed to cylinder body, make the smooth-going to-and-fro motion in cylinder of piston cooling, support piston, prevent that piston from directly contacting with casing wall.
Description according to above effect to piston ring, piston ring material must have the characteristics such as friction resistant wearing and tearing, tension cylinder, initial fitting property are good, the piston ring material that the most generally adopts now has alloy cast iron, spheroidal graphite cast iron and steel, reaches the performance requirement of piston ring by the surface-treated method.
Piston ring excircle working surface durionise is now widely used a kind of surface treatment mode, electrolysis crome metal out from chromic acid solution, its Mohs hardness is 9, Vickers hardness can reach HV750 ~ 1100, is the hardest metal, and is not easy to wear, friction factor during the metallic material such as itself and cast iron, steel coupling is about 0.2, show good wear Characteristics, be applied on the periphery of piston ring and the direct contact friction of cylinder sleeve, can significantly improve Service Life of Piston Ring.
Hard chromium plating on the working surface of piston ring, although can improve surface hardness and wear resistance, piston ring heat conduction in cylinder sleeve is slow, the inhomogeneous shortcoming of cloth oil is letter technical task to be solved.Chinese patent literature CN200920230010.9 provides a kind of " piston ring ", and this patent is zinc-plated again behind the periphery spongy chromium plating of piston ring, and the tin layer that plates can reduce the friction factor of piston ring and cylinder sleeve greatly, improves the working life of fastness.Yet the metallic tin fusing point is low, only has 231.89 ℃, and the highest near the top piston ring institute bearing temperature of firing chamber, often surpass the fusing point of tin, reach about 260 ℃, agglomerating being attached on the cylinder bore wall of metallic tin fusing under this temperature, generation is being melted, the tightness of impact ring and cylinder sleeve.On the other hand, the Mohs hardness of metallic tin is 1.5, and the very low very easily wearing and tearing of hardness although can reach ring and the break-in of cylinder sleeve at the beginning of running-in period, have ensured the tightness of piston ring, excessively low lower hardness the working life of tin layer.The deficiency of two aspects of metallic tin all produces harmful effect to the usability of piston ring, thereby be necessary to seek a kind of cover coat that all can play to the piston ring performance good promoting effect aspect above two, usability and life-span that the pressure of explosion situation that improves constantly at diesel engine can both well improve piston ring.
The model utility content
Technical problem to be solved in the utility model provides a kind of piston ring, the initial stage break-in that guarantees piston ring and cylinder sleeve is safety quick, effectively keep the cylinder seal, reduce the risk that produces scuffing of cylinder bore running-in period, improve Service Life of Piston Ring, reduce internal combustion engine tail gas discharge, optimize whole internal combustion engine performance.
In order to solve the problems of the technologies described above, technological scheme provided by the utility model is: a kind of piston ring comprises piston ring matrix, chromium layer and copper layer; Described chromium layer is coated on the cylindrical of piston ring matrix by electrochemical deposition method; Described copper layer is coated in the outer surface of the piston ring matrix that has applied the chromium layer by electrochemical deposition method.
Described chromium layer is common hard chrome or porosity chromium.
The hardness of described chromium layer is greater than HV750.
The thickness of described chromium layer is 0.1 ~ 0.5mm.
The thickness of described copper layer is 0.004 ~ 0.02mm, and even thickness.
After having adopted technique scheme, the utlity model has following beneficial effect: (1) chromium layer of the present utility model and copper layer form has the combination coating of gradient function, it is soft that this combination coating combines copper layer matter, initial fitting property energy and favorable sealing property and the advantage that chromium layer hardness is high, wear resistance is good, running in stage and normal wearing stage realize a smooth transition in the early stage to make piston ring and cylinder sleeve, reduce the risk of scuffing of cylinder bore running-in period, prolonged the working life of piston ring.
(2) chromium layer of the present utility model and copper layer form and have the combination coating of gradient function, make the firing chamber be in from the beginning good airtight conditions, sealing, heat conduction, support, the cloth functional oil of piston ring have effectively been guaranteed, thereby can reduce the generation of carbon deposit in piston ring and the annular groove, be conducive to improve the stability of cylinder of internal combustion engine break-in and eliminate the risk that cylinder produces burst heavy wear, improved the service behaviour of whole internal-combustion engine.
(3) the utility model can also prevent effectively that machine oil from entering combustion chambers burn, thereby greatly reduce exhaust emissions so that cylinder has good seal.
(4) the utility model meets market demand, good market prospects.
Description of drawings
Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model, wherein according to specific embodiment also by reference to the accompanying drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is coating structure figure of the present utility model.
Label in the accompanying drawing is:
Piston ring matrix 1, chromium layer 2, copper layer 3, combination coating 4.
Embodiment
(embodiment 1)
See Fig. 1, the piston ring of present embodiment comprises piston ring matrix 1, chromium layer 2 and copper layer 3.
The metallic copper fusing point is 1083.4 ℃, and thermal conductivity is good, and Mohs hardness is 3, and the copper facing of piston ring excircle working surface can reduce the friction factor of piston ring and cylinder sleeve effectively.Copper-plated piston ring has during run-in in cylinder and does not produce molten advantage.Because the Mohs hardness of copper is 3, and hardness is lower, easily wearing and tearing can make piston ring shorten running-in period when operation simultaneously.Since copperly softer, to improving the cylinder tightness good effect is arranged also, improved fuel efficiency, reduce exhaust emissions, the hardness with respect to metallic tin doubles simultaneously, and also relatively be enhanced about more than once working life.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a piston ring is characterized in that: comprise piston ring matrix (1), chromium layer (2) and copper layer (3); Described chromium layer (2) is coated on the cylindrical of piston ring matrix (1) by electrochemical deposition method; Described copper layer (3) is coated in the outer surface of the piston ring matrix (1) that has applied chromium layer (2) by electrochemical deposition method.
2. a kind of piston ring according to claim 1, it is characterized in that: described chromium layer (2) is common hard chrome or porosity chromium.
3. a kind of piston ring according to claim 1, it is characterized in that: the hardness of described chromium layer (2) is greater than HV750.
4. a kind of piston ring according to claim 1, it is characterized in that: the thickness of described chromium layer (2) is 0.1 ~ 0.5mm.
5. a kind of piston ring according to claim 1, it is characterized in that: the thickness of described copper layer (3) is 0.004 ~ 0.02mm, and even thickness.
6. piston ring according to claim 1, it is characterized in that: the nominal diameter of piston ring is 50-1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220361946 CN202707273U (en) | 2012-07-25 | 2012-07-25 | Piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220361946 CN202707273U (en) | 2012-07-25 | 2012-07-25 | Piston ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707273U true CN202707273U (en) | 2013-01-30 |
Family
ID=47587582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220361946 Expired - Fee Related CN202707273U (en) | 2012-07-25 | 2012-07-25 | Piston ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707273U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573462A (en) * | 2012-07-25 | 2014-02-12 | 常州南车柴油机零部件有限公司 | Piston ring |
| CN110678675A (en) * | 2017-06-02 | 2020-01-10 | 马勒国际有限公司 | Piston ring and method of manufacturing the same |
| US12123500B2 (en) | 2017-06-02 | 2024-10-22 | Mahle International Gmbh | Piston ring and method of manufacture |
-
2012
- 2012-07-25 CN CN 201220361946 patent/CN202707273U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573462A (en) * | 2012-07-25 | 2014-02-12 | 常州南车柴油机零部件有限公司 | Piston ring |
| CN110678675A (en) * | 2017-06-02 | 2020-01-10 | 马勒国际有限公司 | Piston ring and method of manufacturing the same |
| CN110678675B (en) * | 2017-06-02 | 2021-02-09 | 马勒国际有限公司 | Piston ring and method of manufacturing the same |
| US12123500B2 (en) | 2017-06-02 | 2024-10-22 | Mahle International Gmbh | Piston ring and method of manufacture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20170725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |