CN217055400U - Piston ring group, engine and motor vehicle - Google Patents
Piston ring group, engine and motor vehicle Download PDFInfo
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- CN217055400U CN217055400U CN202220588560.3U CN202220588560U CN217055400U CN 217055400 U CN217055400 U CN 217055400U CN 202220588560 U CN202220588560 U CN 202220588560U CN 217055400 U CN217055400 U CN 217055400U
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Abstract
The application discloses piston ring group, engine and motor vehicle, piston ring group includes: the first gas ring is a barrel surface ring, and the outer peripheral surface of the first gas ring is provided with a DLC coating; the second gas ring is a conical ring, the peripheral surface of the second gas ring is sequentially provided with a Cr coating and a DLC coating from inside to outside, the second gas ring is provided with a first end surface and a second end surface which are respectively connected with the peripheral surface of the second gas ring, the distance from the telecentric end of the first end surface to the central axis of the second gas ring is greater than the distance from the telecentric end of the second end surface to the central axis of the second gas ring, and the first end surface and the peripheral surface of the second gas ring are connected through a fillet part; the oil ring is set to be a three-piece oil ring and comprises a scraping piece and a backing ring, and the outer circular surface of the scraping piece is provided with a DLC coating. First way gas ring, second way gas ring and oil ring have higher corrosion-resistant and wear resistance in the piston ring group that this application disclosed, have reduced the aggressivity to the cylinder liner, have improved tensile jar performance, help prolonging the life of whole piston ring group.
Description
Technical Field
The application relates to the technical field of engines, in particular to a piston ring group, an engine and a motor vehicle.
Background
Under the pressure of environmental protection, various energy engines are successively pushed out, and more typical energy sources are as follows: natural gas, methanol, ethanol, and the like. In some fields, in particular the field of commercial vehicles, the engine has the power advantage that the electric drive cannot be replaced. Taking a methanol engine as an example, the fuel medium of the methanol engine is liquid methanol, and the liquid methanol is premixed by an air inlet pipe and then is combusted by a compression spark plug to do work. Compared with the traditional diesel engine, the methanol fuel engine has the advantages that the methanol fuel is renewable energy, is easy to store and transport, has good combustibility, produces less combustion gas pollutants, and particularly has no sulfides and less solid particles.
However, the methanol fuel engine also has many disadvantages, such as large water vapor content generated after methanol combustion, which causes great challenge to the friction pair of the engine, especially to the lubrication friction between the piston ring and the cylinder liner, and meanwhile, methanol is easy to generate acidic substances in the combustion process, which not only damages the lubrication cooling system, but also causes serious corrosion to the piston ring and the cylinder liner, especially the abrasion between the first gas ring and the cylinder liner, and the abrasion between the second gas ring and the cylinder liner, and between the oil ring and the cylinder liner, however, the piston ring subjected to nitriding treatment or chromium plating treatment adopted by the traditional engine has the problem of easy failure, and the abrasion and corrosion problems of the methanol engine in the working process can not be satisfied.
SUMMERY OF THE UTILITY MODEL
The application provides a piston ring group, an engine and a motor vehicle, which aim to solve at least one technical problem.
The technical scheme adopted by the application is as follows:
a piston ring set comprising: the first primary air ring is arranged to be a barrel surface ring, and the peripheral surface of the first primary air ring is provided with a DLC coating; the second gas ring is arranged as a conical ring, the peripheral surface of the second gas ring is sequentially provided with a Cr coating and a DLC coating from inside to outside, the second gas ring is provided with a first end surface and a second end surface which are respectively connected with the peripheral surface of the second gas ring, the distance from the telecentric end of the first end surface to the central axis of the second gas ring is greater than the distance from the telecentric end of the second end surface to the central axis of the second gas ring, and the first end surface is connected with the peripheral surface of the second gas ring through a fillet part; the oil ring is a three-piece oil ring and comprises a scraping piece and a backing ring, and the outer circular surface of the scraping piece is provided with a DLC coating.
The piston ring group in the application also has the following additional technical characteristics:
the second air ring is of a positive torsion structure.
The second gas ring is a steel gas ring.
The DLC coating of the second gas ring has a thickness of at least 0.005 mm.
The fillet radius of the fillet part is 0.15-0.2 mm.
The thickness of the DLC coating of the wiper blade is at least 0.01 mm.
The thickness of the DLC coating of the first gas ring ranges from 0.013 mm to 0.028 mm.
The engine comprises a piston, a piston cylinder and a cylinder sleeve arranged in the piston cylinder, and further comprises the piston ring group, wherein the piston ring group is arranged on the piston, and the piston is arranged in the cylinder sleeve and can reciprocate along the through direction of the cylinder sleeve.
The cylinder liner is of a steel structure, and a Cr coating is arranged on the inner side wall of the cylinder liner.
An automobile is provided with the engine, and the engine is a methanol engine.
Due to the adoption of the technical scheme, the technical effects obtained by the application are as follows:
in the application, the outer peripheral surface of the first gas ring, which is contacted with the cylinder sleeve, is provided with a DLC coating (diamond-like carbon coating), the outer peripheral surface of the second gas ring, which is contacted with the cylinder sleeve, is sequentially provided with a Cr coating (chromium coating) and a DLC coating from inside to outside, a scraper of the oil ring is provided with the DLC coating, the DLC coating has high hardness and good corrosion resistance which is 2-3 times of that of a chromium-plated ring or a nitride ring, so that the first gas ring, the second gas ring and the oil ring have higher corrosion resistance and wear resistance, the DLC coating has lower friction coefficient, the aggressivity of the first gas ring, the second gas ring and the oil ring to the cylinder sleeve is reduced, the tensile cylinder performance of the first gas ring, the second gas ring and the oil ring is improved, the service life of the whole piston ring group is prolonged, the friction coefficient is reduced, the friction loss is smaller, the economy of alcohol fuels is improved to a certain extent, the three-piece oil ring has higher oil drainage performance. Therefore, the piston ring group that this application provided plays effective sealing, control gas mixture's the volume of revealing on the basis of reducing to machine oil pollution, has stronger adaptability to strong corruption, dry friction environment, has promoted the reliability of engine greatly.
In addition, in the second air ring, even if the DLC coating at the cone angle is worn through by the cylinder sleeve, the Cr coating can also ensure the better wear-resisting property of the second air ring. More importantly, this application still makes the first terminal surface and the outer peripheral face of second way gas ring pass through fillet portion and connect, and the cone angle department that second way gas ring and cylinder liner contacted adopts the fillet to handle promptly, compares in the closed angle, can reduce the DLC coating problem of peeling off of cone angle department to a great extent in second way gas ring actual working process, makes the wear resistance of second way gas ring obtain the powerful guarantee.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic cross-sectional view of a first gas ring provided in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a second gas ring provided in embodiments of the present application;
FIG. 3 is a schematic cross-sectional view of an oil ring as provided by embodiments herein;
FIG. 4 is a schematic diagram of a cylinder liner configuration as provided in an embodiment of the present application.
Reference numerals:
1. a first air ring;
2. a second air ring 21, a first end face 22, a second end face 23 and a fillet part;
3. an oil ring 31, a scraper 32, a backing ring;
41. a first DLC coating, 42, a second DLC coating, 43, a third DLC coating;
51. a first Cr coating 52, a second Cr coating;
6. and (6) cylinder liners.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present application.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the embodiment of the present application, a piston ring assembly as shown in fig. 1 to 3 is provided, and for convenience of illustration and understanding, the following description is provided on the basis of the structure of the product shown in the drawings. Of course, it is understood by those skilled in the art that the above-described structure is only used as a specific example and illustrative illustration, and does not constitute a specific limitation to the technical solution provided by the present application. Although not shown in the drawings, the present application also provides a methanol engine, which is applied with the piston ring set provided in the embodiments of the present application.
Referring to fig. 1 to 3, a piston ring assembly includes: the first gas ring 1 is a barrel surface ring, and the peripheral surface of the first gas ring 1 is provided with a DLC coating; the second gas ring 2 is a conical ring, the outer peripheral surface of the second gas ring 2 is sequentially provided with a Cr coating and a DLC coating from inside to outside, the second gas ring 2 is provided with a first end surface 21 and a second end surface 22 which are respectively connected with the outer peripheral surface of the second gas ring, the distance from the far center of the first end surface 21 to the central axis of the second gas ring 2 is greater than the distance from the far center of the second end surface 22 to the central axis of the second gas ring 2, and the outer peripheral surfaces of the first end surface 21 and the second gas ring 2 are connected through a round corner part 23; the oil ring 3 is a three-piece oil ring 3 and comprises a scraping piece 31 and a backing ring 32, and the outer circular surface of the scraping piece 31 is provided with a DLC coating. For convenience of description and understanding, as shown in fig. 1 to 3, the present application schematically sets the DLC coatings on the first gallery gas ring 1, the second gallery gas ring 2 and the oil ring 3 as a first DLC coating 41, a second DLC coating 42 and a third DLC coating 43, respectively, the Cr coating of the second gallery gas ring 2 as a first Cr coating 51, and the Cr coating of the cylinder liner as a first Cr coating 52.
As will be understood by those skilled in the art, in the piston ring set provided in the present application, the outer circumferential surface of the first gas ring 1 contacting the cylinder liner 6 is provided with a first DLC coating 41 (diamond-like carbon coating), and the outer circumferential surface of the second gas ring 2 contacting the cylinder liner 6 is sequentially provided with a first Cr coating 51 (chromium coating) and a second DLC coating 42 from inside to outside, the wiper 31 of the oil ring 3 is provided with a third DLC coating 43, the DLC coating has high hardness and good corrosion resistance, which is 2 to 3 times the hardness of the chrome plated ring or the nitride ring, so that the first gas ring 1, the second gas ring 2, and the oil ring 3 have higher corrosion resistance and wear resistance, and the DLC coating has a lower friction coefficient, thereby reducing the aggressivity of the first gas ring 1, the second gas ring 2, and the oil ring 3 to the cylinder liner 6, improving the tensile cylinder performance of the first gas ring 1, the second gas ring 2, and the oil ring 3, the service life of the whole piston ring set is prolonged, the friction loss is small due to the reduction of the friction coefficient, the economy of alcohol fuels is improved to a certain extent, and the three-piece oil ring 3 has high oil drainage performance. Consequently, the piston ring group that this application provided plays effective seal, control the volume of revealing of gas mixture on the basis that reduces to machine oil pollution, has stronger adaptability to strong corruption, dry friction environment, has promoted the reliability of engine greatly.
In addition, in the second gas ring 2, even if the second DLC coating 42 at the cone angle is worn through by the cylinder liner 6, the existence of the first Cr coating 51 can ensure better wear resistance of the second gas ring 2. More importantly, the first end face 21 and the outer peripheral face of the second gas ring 2 are connected through the fillet 23, namely the taper angle of the second gas ring 2 in contact with the cylinder sleeve 6 is processed by a fillet, and compared with the fillet, the peeling problem of the second DLC coating 42 at the taper angle can be reduced to a great extent in the actual working process of the second gas ring 2, so that the wear resistance of the second gas ring 2 is effectively guaranteed.
As a preferred embodiment of the present application, the second air ring 2 may have a positive torsion structure.
As can be understood by those skilled in the art, the second gas ring 2 is designed to be a conical forward-torsional structure, which is helpful for enhancing sealing, reducing the gas leakage of the piston cylinder and properly controlling the oil consumption of the engine oil, and well ensuring the gas leakage index.
As a preferred embodiment of the present application, the second gas ring 2 may be a steel gas ring.
Those skilled in the art can understand that, compared with the gas ring made of cast iron, when the second gas ring 2 is made of steel, the performance parameters such as the elastic modulus and the hardness are greatly improved, the second gas ring has flexibility, the mass of the ring body is further reduced through the adjustment of the geometric dimension, the inertia force in the working process is reduced, and the steel gas ring and the steel chromium-plated cylinder sleeve with high hardness have higher adaptability.
As a preferred embodiment of the present application, the thickness of the second DLC coating 42 of the second gas ring 2 may be at least 0.005mm, and as a preferred example, the thickness of the second DLC coating 42 of the second gas ring 2 may be 0.005 to 0.025 mm.
As a preferred embodiment of the present application, the fillet radius of the fillet 23 may be 0.15-0.2mm, and as a preferred embodiment, the fillet radius of the fillet 23 may be 0.2mm, so as to minimize the peeling-off problem of the second DLC coating 42 at the taper angle of the second gas ring 2.
As a preferred embodiment of the present application, the thickness of the third DLC coating 43 of said blade 31 may be made at least 0.01mm, and as a preferred embodiment, the thickness of the third DLC coating 43 of the blade 31 is taken to be 0.01-0.035 mm.
As a preferred embodiment of the present application, the thickness of the first DLC coating 41 of the first gas ring 1 can be made in the range of 0.013 to 0.028 mm.
Verification shows that the piston ring begins to be worn and scratched after the second gas ring and the oil ring adopt non-DLC coatings after the second gas ring and the oil ring are durable for about 500 hours, the piston ring coating is worn through after 700 hours, in the test adopting the piston ring set provided by the application, all rings in the piston ring set are not abnormal after 700 hours, and the performance index meets the design requirement.
In the engine that this application provided, including piston, piston cylinder and install in cylinder liner 6 in the piston cylinder, the engine still includes as above piston ring group, piston ring group install in the piston, the piston install in 6 cylinder liner and can follow 6 direction reciprocating motion that link up of cylinder liner.
Because the engine provided by the present application includes the piston ring set in any one of the above embodiments, beneficial effects of the piston ring set are all included in the engine provided by the present application, and are not described herein again.
It should be noted that the present application does not limit the type of the engine, and as an optimization, the present application is suitable for new energy engines of alcohols such as methanol and ethanol, and has reference significance for traditional diesel engines and gasoline engines.
Further preferably, as shown in fig. 4, the cylinder liner 6 may be made of steel and the inner side wall of the cylinder liner 6 is provided with a second Cr coating 52.
The technical personnel in the field can understand that the steel chromium-plated cylinder sleeve 6 has high hardness and better wear resistance, is suitable for a piston ring group with each ring processed by a DLC coating, and tests prove that when the steel chromium-plated cylinder sleeve 6 is combined with the piston ring group provided by the application, the piston ring group and the cylinder sleeve 6 are not abnormal after 700 hours, and the performance index meets the design requirement.
In addition, the application also provides a motor vehicle which is provided with the engine, the engine is a methanol engine, the function of the methanol engine is as described above, and the description is omitted.
Where not mentioned in this application, can be accomplished using or referencing existing technology.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. A piston ring pack, comprising:
the first gas ring is arranged as a barrel surface ring, and the outer peripheral surface of the first gas ring is provided with a DLC coating;
the second gas ring is arranged as a conical ring, the peripheral surface of the second gas ring is sequentially provided with a Cr coating and a DLC coating from inside to outside, the second gas ring is provided with a first end surface and a second end surface which are respectively connected with the peripheral surface of the second gas ring, the distance from the telecentric end of the first end surface to the central axis of the second gas ring is greater than the distance from the telecentric end of the second end surface to the central axis of the second gas ring, and the first end surface is connected with the peripheral surface of the second gas ring through a fillet part;
the oil ring is a three-piece oil ring and comprises a scraping piece and a backing ring, and a DLC coating is arranged on the outer circular surface of the scraping piece.
2. A piston ring pack according to claim 1,
the second air ring is of a positive torsion structure.
3. A piston ring pack according to claim 1,
the second gas ring is a steel gas ring.
4. A piston ring pack according to claim 1,
the DLC coating of the second gas ring has a thickness of at least 0.005 mm.
5. A piston ring pack according to claim 1,
the fillet radius of the fillet part is 0.15-0.2 mm.
6. A piston ring pack according to claim 1,
the thickness of the DLC coating of the wiper blade is at least 0.01 mm.
7. A piston ring pack according to claim 1,
the DLC coating of the first gas ring has a thickness in the range of 0.013-0.028 mm.
8. An engine comprising a piston, a piston cylinder and a cylinder liner mounted in the piston cylinder, characterized in that the engine further comprises a piston ring set as claimed in any one of claims 1 to 7, said piston ring set being mounted to the piston, said piston being mounted in the cylinder liner and being capable of reciprocating in the direction of penetration of the cylinder liner.
9. An engine according to claim 8,
the cylinder liner is of a steel structure, and a Cr coating is arranged on the inner side wall of the cylinder liner.
10. A motor vehicle, characterized in that it is equipped with an engine according to any one of claims 8 to 9, said engine being a methanol engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220588560.3U CN217055400U (en) | 2022-03-16 | 2022-03-16 | Piston ring group, engine and motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220588560.3U CN217055400U (en) | 2022-03-16 | 2022-03-16 | Piston ring group, engine and motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217055400U true CN217055400U (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220588560.3U Active CN217055400U (en) | 2022-03-16 | 2022-03-16 | Piston ring group, engine and motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217055400U (en) |
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2022
- 2022-03-16 CN CN202220588560.3U patent/CN217055400U/en active Active
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