CN217501815U - Piston ring with high wear resistance suitable for matching steel piston - Google Patents
Piston ring with high wear resistance suitable for matching steel piston Download PDFInfo
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- CN217501815U CN217501815U CN202221502075.6U CN202221502075U CN217501815U CN 217501815 U CN217501815 U CN 217501815U CN 202221502075 U CN202221502075 U CN 202221502075U CN 217501815 U CN217501815 U CN 217501815U
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- Prior art keywords
- coating
- piston ring
- piston
- wear resistance
- thickness
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 98
- 238000000576 coating method Methods 0.000 claims abstract description 98
- 239000002131 composite material Substances 0.000 claims abstract description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims 2
- 229910000676 Si alloy Inorganic materials 0.000 claims 1
- 229910052804 chromium Inorganic materials 0.000 description 7
- 239000011651 chromium Substances 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 7
- 238000004880 explosion Methods 0.000 description 5
- 229910019819 Cr—Si Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a piston ring with high wear resistance suitable for matching steel pistons, the lower end surface of the piston ring is provided with a first coating, the first coating is a DLC coating, and the thickness of the first coating is 0.002-0.006 mm; a second coating is arranged on the outer circumferential surface of the piston ring, and the second coating is a first DLC coating, or the second coating is a composite coating consisting of an FDC coating and a second DLC coating arranged on the outer side of the FDC coating; the thickness of the first DLC coating is 0.01-0.03 mm; the thickness of the second DLC coating is 0.004-0.01 mm, and the thickness of the FDC coating is 0.03-0.2 mm. Piston ring and steel piston match the performance well, wear-resisting, intensity is high, do not take place disconnected ring.
Description
Technical Field
The utility model relates to an internal-combustion engine piston ring, in particular to piston ring that has high wear resistance suitable for match steel piston.
Background
In order to meet the increasingly stringent energy-saving and emission-reducing requirements of engines, the effective measure is to increase the explosion pressure in the cylinder, more and more engines with the highest explosion pressure of 18-24 MPa are provided, and some engines reach more than 27 MPa. On the other hand, the extremely high explosion pressure also aggravates the thermal load and the mechanical load of related parts, as a piston bearing the explosion pressure to rush first, the requirement is met by upgrading an aluminum piston to a steel piston, for a piston ring, the increase of the explosion pressure increases the contact pressure between the piston ring and the lower end face of the ring groove, the abrasion between the piston ring and the lower end face of the ring groove is aggravated, the side gap between the ring and the ring groove is increased, the air blowby channel is increased, the air blowby quantity is increased, and the problems of power reduction, engine oil deterioration and the like are caused. In order to solve the problem, in the prior art, the lower end face of the first piston ring is subjected to chromium plating treatment, and the chromium layer with higher hardness is used for increasing the wear resistance, but the chromium layer and the steel piston are not good in matching performance, the chromium layer has aggressive performance on a steel ring groove, the wear of both the ring and the ring groove is still large, the end face of the piston ring is subjected to nitriding treatment for increasing the wear resistance, although the end face wear resistance condition is improved greatly, due to the existence of the problem of nitrogen brittleness, the bending strength of the piston ring is greatly reduced, and the risk of fatigue fracture exists in a high-explosive-pressure environment.
The prior art "a side super wear-resistant piston ring" (CN 204493001U) provides a piston ring, but the technology is limited to the improvement of the side wear-resistant problem, and the DLC coating used on the side is too thin, so that the reliability and durability still have risks.
The end face of a piston ring provided by the prior internal combustion engine wear-resistant piston ring (CN 202883145U) adopts a chromium coating, the matching performance of the piston ring and a steel piston is not good, the end faces of the piston ring and the steel piston are still abraded greatly, and in addition, the excircle of the piston ring adopts a chromium-based composite coating, and the excircle wear resistance is still not good enough.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problem of the prior art, the utility model provides a piston ring that has high wear resistance suitable for match steel piston, this piston ring and steel piston matching capability is good, and is wear-resisting, and intensity is high, does not take place disconnected ring.
The technical scheme is as follows: the piston ring with high wear resistance suitable for matching steel pistons, provided by the utility model, is characterized in that the lower end surface of the piston ring is provided with a first coating, the first coating is a DLC (diamond-like carbon) coating, and the thickness of the first coating is 0.002-0.006 mm; the outer circular surface of the piston ring is provided with a second coating, and the second coating is a first DLC coating, or the second coating is a composite coating consisting of an FDC coating and a second DLC coating arranged on the outer side of the FDC coating; the thickness of the first DLC coating is 0.01-0.03 mm; the thickness of the second DLC coating is 0.004-0.01 mm, and the thickness of the FDC coating is 0.03-0.2 mm.
As a preferred structure of the utility model, the hardness of first coating is 1800 ~ 3000HV 0.025.
As an optimized structure of the utility model, the thickness of the first coating is 0.003-0.004 mm.
As a preferred structure of the utility model, the hardness of first DLC coating is 2000 ~ 3500HV 0.025.
As an optimized structure of the utility model, the thickness of first DLC coating is 0.02 ~ 0.030 mm.
As a preferred structure of the utility model, the hardness of second DLC coating is 1800 ~ 3000HV 0.025.
As a preferred structure of the utility model, the hardness of the FDC coating is 900-1200 HV 0.1; and/or the thickness of the FDC coating is 0.05-0.15 mm.
As an optimized structure of the utility model, the FDC coating contains the diamond particle of 0.1 ~ 5 mu m size, and the diamond particle content accounts for 0.3 ~ 2.5% of composite coating volume.
As a preferred structure of the utility model, the section of the piston ring is rectangular, wedge-shaped or trapezoidal; and/or the excircle surface of the piston ring is a symmetrical barrel surface or a non-symmetrical barrel surface.
As a preferable structure of the utility model, the material of the piston ring is Cr-Si alloy steel of MC64 or non-alloy steel of MC 68.
Has the advantages that: (1) the utility model improves the excircle and end face of the piston ring, improves the wear resistance of the excircle and end face of the piston ring, and meets the requirements of the reliability and durability of the whole machine; (2) the piston ring of the utility model keeps the extremely high bending strength performance of the steel material, can not break even under the extremely high burst pressure, lays a foundation for further reducing the axial height of the ring, reduces the axial height of the ring, can reduce the height of the piston, and further can shorten the height of the machine body, is beneficial to the weight reduction of the whole machine and the reduction of fuel consumption; (3) the lower end surface of the piston ring of the utility model is provided with the DLC coating with proper hardness and thickness, and the DLC coating has low friction coefficient and good matching performance with the steel material of the piston, thereby greatly reducing the abrasion of the end surface of the piston ring and the end surface of the ring groove, and the service life of B10 reaches more than 150 kilometers; (4) the utility model discloses the outer disc of piston ring provides two kinds of coating schemes and selects, all has good wear resistance, has improved the flexibility ratio in the design.
Drawings
Fig. 1 is a front view of a piston ring according to the present invention;
FIG. 2 is a cross-sectional view of the piston ring A-A of FIG. 1;
figure 3 is a cross-sectional view of the piston ring a-a of figure 1.
Detailed Description
Example (b): as shown in fig. 1, the piston ring 1 of the present invention is a first ring, which is suitable for cylinder diameters: 60-160 mm. In fig. 1, Φ d1 represents the diameter of the piston ring 1, and the piston ring 1 may be made of the following materials: Cr-Si alloy steel with fine grade MC64 or non-alloy steel with fine grade MC68, preferably MC64 Cr-Si alloy steel according to ISO6621-3/GB1149.3 specification for piston ring material of internal combustion engine; in this embodiment, the cross-sectional shape of the piston ring 1 may be rectangular, wedge-shaped, or trapezoidal, and the outer circle may be a symmetrical barrel surface or a non-symmetrical barrel surface. The lower end surface of the piston ring 1 is provided with a first coating layer 101, the first coating layer 101 is a DLC coating layer (diamond-like carbon coating), the thickness of the first coating layer 101 is 0.002 to 0.006mm, the hardness of the first coating layer 101 is 1800 to 3000HV0.025, as a preferred embodiment of the present embodiment, the thickness of the first coating layer 101 is 0.003 to 0.004mm, as a most preferred embodiment of the present embodiment, the thickness of the first coating layer 101 is 0.004 mm.
The outer circumferential surface of the piston ring 1 is provided with a second coating 102, and in this embodiment, the second coating 102 has two options:
as shown in fig. 2, the first embodiment is: the second coating 102 is a first DLC coating, the hardness of the first DLC coating is 2000-3500 HV0.025, and the thickness of the first DLC coating is 0.010-0.030 mm, preferably 0.020-0.030 mm; when the coating with the mode is selected on the outer circular surface, the second coating 102 is a single DLC coating which has high hardness, low friction coefficient and larger thickness, strong dry friction resistance, strong cylinder stretching resistance, strong wear resistance and small abrasion to a cylinder, and the service life of the product B10 reaches more than 150 kilometres.
As shown in fig. 3, the second embodiment is: the second coating 102 is a composite coating composed of an FDC coating 1021 (diamond-chromium composite coating) and a second DLC coating 1022 disposed outside the FDC coating 1021; the hardness of the FDC coating is 900-1200 HV0.1, the thickness of the FDC coating is 0.03-0.20 mm, preferably, the thickness of the FDC coating is 0.05-0.15 mm, the FDC coating comprises diamond particles with the size of 0.1-5.0 mu m, the content of the diamond particles accounts for 0.3-2.5% of the volume of the composite coating, and the FDC coating has microcracks with the density of 40-120 pieces/mm; the hardness of the second DLC coating 1022 is 1800-3000 HV0.025, the thickness of the second DLC coating 1022 is 0.004-0.01 mm, and preferably, the thickness of the second DLC coating 1022 is 0.005-0.007 mm. When the second coating 102 is in a composite coating structure, the second DLC coating positioned on the outer side plays a role in improving initial running-in and preventing initial cylinder pull, and can also improve the wear resistance to a certain extent. The combined coating product B10 of the second embodiment has a life of more than 150 kilometres.
Claims (10)
1. A piston ring with high wear resistance suitable for matching a steel piston, characterized in that the lower end face of the piston ring (1) is provided with a first coating (101), the first coating (101) is a DLC coating, the thickness of the first coating (101) is 0.002-0.006 mm; the outer circumferential surface of the piston ring (1) is provided with a second coating (102), the second coating (102) is a first DLC coating, or the second coating (102) is a composite coating consisting of an FDC coating (1021) and a second DLC coating (1022) arranged on the outer side of the FDC coating (1021); the thickness of the first DLC coating is 0.01-0.03 mm; the thickness of the second DLC coating is 0.004-0.01 mm, and the thickness of the FDC coating is 0.03-0.2 mm.
2. Piston ring with high wear resistance suitable for matching a steel piston according to claim 1, characterized in that the hardness of the first coating (101) is 1800 to 3000HV 0.025.
3. The piston ring with high wear resistance suitable for matching a steel piston according to claim 2, characterized in that the thickness of the first coating (101) is 0.003-0.004 mm.
4. The piston ring with high wear resistance suitable for mating a steel piston as claimed in claim 1 wherein the hardness of the first DLC coating is 2000 to 3500HV 0.025.
5. The piston ring with high wear resistance suitable for use in a mating steel piston as claimed in claim 4 wherein said first DLC coating has a thickness of 0.02 to 0.030 mm.
6. The piston ring with high wear resistance suitable for matching a steel piston of claim 1, characterized in that the hardness of the second DLC coating is 1800 to 3000HV 0.025.
7. The piston ring with high wear resistance suitable for matching a steel piston according to claim 6, characterized in that the FDC coating (1021) hardness is 900-1200 HV 0.1; and/or the thickness of the FDC coating (1021) is 0.05-0.15 mm.
8. The piston ring with high wear resistance suitable for matching steel piston as claimed in claim 7, characterized in that the FDC coating (1021) contains diamond particles with size of 0.1-5 μm, and the content of diamond particles is 0.3-2.5% of the volume of the composite coating.
9. Piston ring with high wear resistance suitable for matching a steel piston according to claim 1, characterized in that the cross section of the piston ring (1) is rectangular, wedge-shaped or trapezoidal; and/or the excircle surface of the piston ring (1) is a symmetrical barrel surface or an asymmetrical barrel surface.
10. Piston ring with high wear resistance suitable for matching a steel piston according to claim 1, characterized in that the material of the piston ring (1) is chrome silicon alloy steel of MC64 or non-alloy steel of MC 68.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221502075.6U CN217501815U (en) | 2022-06-16 | 2022-06-16 | Piston ring with high wear resistance suitable for matching steel piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221502075.6U CN217501815U (en) | 2022-06-16 | 2022-06-16 | Piston ring with high wear resistance suitable for matching steel piston |
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| Publication Number | Publication Date |
|---|---|
| CN217501815U true CN217501815U (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221502075.6U Active CN217501815U (en) | 2022-06-16 | 2022-06-16 | Piston ring with high wear resistance suitable for matching steel piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217501815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119554153A (en) * | 2024-11-29 | 2025-03-04 | 广西玉柴机器股份有限公司 | Engine air ring structure |
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2022
- 2022-06-16 CN CN202221502075.6U patent/CN217501815U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119554153A (en) * | 2024-11-29 | 2025-03-04 | 广西玉柴机器股份有限公司 | Engine air ring structure |
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