CN215763239U - Steel oil ring with low-friction and low-engine-oil consumption performance - Google Patents
Steel oil ring with low-friction and low-engine-oil consumption performance Download PDFInfo
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- CN215763239U CN215763239U CN202121549662.6U CN202121549662U CN215763239U CN 215763239 U CN215763239 U CN 215763239U CN 202121549662 U CN202121549662 U CN 202121549662U CN 215763239 U CN215763239 U CN 215763239U
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Abstract
The utility model discloses a steel oil ring with low friction and low engine oil consumption performance, which comprises an oil ring body and oil scraping belts, wherein the oil scraping belts are outwards convex parts arranged on the oil ring body, the two oil scraping belts are symmetrically arranged on two sides of the ring height center line of the oil ring body, and the ratio of the distance between the two oil scraping belts to the ring height of the oil ring body is 0.35-0.5. The utility model improves the performance of the oil ring, enhances the strength of the oil ring, reduces the elasticity, reduces the friction power consumption and enhances the wear resistance by reducing the width of the working oil belt and adopting the low-friction high-wear-resistance coating.
Description
Technical Field
The utility model relates to an oil ring, in particular to a steel oil ring with low friction and low oil consumption performance.
Background
The combined oil ring comprises an oil ring body and a spring which plays a supporting role on the oil ring body. The inner side of the oil ring body is provided with a spring groove for accommodating the spring, the spring is arranged in the oil ring body and then is arranged in the cylinder, the spring is compressed, so that the oil ring body is provided with required tension, and the oil scraping belt on the outer circle of the oil ring generates a scraping effect on engine oil by virtue of the tension, so that the piston ring group keeps proper amount of engine oil lubrication and maintains normal use function.
It has been found through long-term experience that oil rings have three parameters of most importance: the material of the oil ring, the width of the oil scraper strip and the coating of the oil scraper strip. They have important effects on the oil consumption performance, particle emission and reliability of the whole machine. The material of the oil ring determines the breaking strength of the oil ring, the width of the oil scraping belt determines the contact area of the ring and the cylinder wall, the contact pressure of the ring on the cylinder wall is further influenced, and finally the oil scraping capacity and the friction power consumption of the ring are influenced. The coating of the oil-scraping strip also has a significant effect on the frictional wear properties of the ring and the cylinder wall. There are several new techniques for improving conventional oil rings, such as using profiled oil scraping strips, using new coatings, etc. The prior art provides a multi-component oil ring (CN2010800438001) requiring a nitriding treatment, which causes nitrogen brittleness and adversely affects the fracture resistance and fatigue strength of the oil ring.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problems in the prior art, the utility model provides a steel oil ring with low friction and low oil consumption performance.
The technical scheme is as follows: the steel oil ring with the low-friction and low-engine-oil consumption performance comprises an oil ring body and oil scraping belts, wherein the oil scraping belts are outwards convex parts arranged on the oil ring body, the two oil scraping belts are symmetrically arranged on two sides of the ring height center line of the oil ring body, and the ratio of the distance between the two oil scraping belts to the ring height of the oil ring body is 0.35-0.5.
As a preferable structure of the utility model, the outer circle surface of the oil scraping belt is provided with a diamond-like carbon coating film with the thickness of 0.01-0.04 mm as a first coating layer.
In a preferred structure of the present invention, the thickness of the first coating layer is 0.015 to 0.03mm, and the hardness of the first coating layer is 2000 to 4000HV 0.025.
As a preferable structure of the utility model, transition belts with circular arc-shaped sections are arranged at two edges of the oil scraping belt, and the circular arc radius of the sections of the transition belts is 0.005-0.02 mm.
As a preferable structure of the utility model, the width of the oil scraping belt is 0.05-0.15 mm.
As a preferable structure of the utility model, the protruding height of the oil scraping belt is 0.15-0.3 mm.
As a preferable structure of the utility model, the ratio of the nominal tangential elasticity of the oil ring to the nominal cylinder diameter is 0.20-0.40N/mm.
As a preferable structure of the utility model, the ratio of the nominal tangential elasticity of the oil ring to the nominal cylinder diameter is 0.20-0.30N/mm.
As a preferable structure of the utility model, the inner side angle alpha of the oil scraping belt is 5-10 degrees.
As a preferable structure of the utility model, the outer side angle beta of the oil scraping belt is 10-20 degrees.
Has the advantages that: (1) the utility model reduces the width of the working oil belt, adopts the low-friction high-wear-resistance coating, improves the performance of the oil ring, reduces the tangential elasticity, improves the strength of the oil ring, reduces the friction power consumption and improves the wear resistance on the premise of not reducing or even improving the contact pressure. (2) The outer circle surface of the oil scraping belt is provided with the hard and wear-resistant coating with low friction coefficient and self-lubricating property, so that the friction power consumption is reduced, the wear resistance is improved, and the requirement of long service life of the whole machine is met. (3) The distance between the two oil scraping belts is reduced, so that the oil scraping belts lean against the center line of the ring height, the minimum radial offset degree is favorably kept in the processing and using processes, the control of oil consumption is further favorably realized, and the cylinder pulling phenomenon caused by the contact of the single-side oil scraping belt and the cylinder is prevented. (4) The utility model ensures that the oil scraping belt is of a conventional structure and is not of a special-shaped structure in the prior art on the basis of meeting the requirements of wear resistance and oil consumption reduction through the improvement of the integral structure of the oil ring, thereby providing a simpler profile process condition and being beneficial to controlling the profile cost.
Drawings
FIG. 1 is a schematic view of the overall construction of the steel oil ring of the present invention;
FIG. 2 is a cross-sectional view A-A of the steel oil ring of FIG. 1 in accordance with the present invention;
FIG. 3 is an enlarged view of section I of FIG. 1 according to the present invention;
FIG. 4 is a view of the steel oil ring of the present invention in operation in a ring groove of a piston;
FIG. 5 is a schematic view of the radial offset of the oil band;
FIG. 6 is a graph comparing the wear resistance of coatings used in the present invention with other coatings.
Detailed Description
The overall structure of the steel oil ring is shown in figure 1, and specifically is a spiral spring oil ring, the structure of the steel oil ring meets the processing standard of ISO6626-3, and the applicable cylinder diameter of the steel oil ring in the embodiment is
The cross section of the steel oil ring is shown in fig. 2 and 3, the steel oil ring comprises an oil ring body 100, an oil scraping belt 200 and a spring 300 arranged at an inner circular groove of the oil ring body 100, the spring is installed in the oil ring body and then is installed in a cylinder, the spring is compressed, therefore, the required tension is generated on the oil ring body, the oil scraping belt on the outer circle of the oil ring generates a scraping effect on engine oil by virtue of the tension, and the working state of the steel oil ring is shown in fig. 4.
The base material of the steel oil ring is carbon steel or alloy steel, the Vickers hardness of the steel oil ring is 370-580 HV, the steel oil ring of the embodiment is made of the carbon steel or alloy steel material with higher hardness, the end face of the steel oil ring can meet the requirement of the abrasion resistance of the end face of the oil ring without being subjected to hardening coating treatment, and the material has extremely high tensile strength, so that the movable ring has extremely high breaking resistance, is difficult to break even by hand, and is particularly suitable for engines with extremely high explosion pressure. In order to further improve the performance of the steel oil ring, as a preferable structure, the two side faces and the rest parts of the outer side of the oil belt of the oil ring body are provided with the second coating layer 102, the second coating layer 102 is a diamond-like carbon coating (DLC coating) with the thickness of 0.01-0.04 mm, preferably, the thickness of the second coating layer is 0.015-0.03 mm, the hardness is 2000-4000 HV0.025, the coating is in a carbon black color, hydrogen is not contained in the coating, and the metallographic structure of the coating is in an amorphous state.
As shown in fig. 2, the oil scraping belts 200 are outward convex protrusions provided on the oil ring body 100, and the two oil scraping belts 200 are located at the ring height center line O of the oil ring body 1001The two sides of the steel oil ring are symmetrically arranged, the ratio of the distance B3 between the two oil scraping belts 200 to the ring height h1 of the oil ring body 100 is 0.35-0.5, in the embodiment, the width h5 of the oil scraping belts 200 is 0.05-0.15 mm, and the protruding height t of the oil scraping belts 200 is 0.15-0.3 mm, as shown in fig. 5, compared with the conventional design, the steel oil ring of the embodiment reduces the distance between the two oil scraping belts, and is beneficial to keeping the oil scraping belts close to the center line of the ring height, so that the steel oil ring is beneficial to keeping a tiny radial offset degree in the processing and using processes, wherein the radial offset degree is X shown in fig. 5, and further is beneficial to controlling oil consumption, and preventing the cylinder pulling phenomenon caused by the contact of the single-side oil scraping belts and the air cylinder.
The outer circumferential surface of the oil scraping belt 200 is provided with a diamond-like carbon coating (DLC coating) with the thickness of 0.01-0.04 mm as a first coating 201, preferably, the thickness p of the first coating is 0.015-0.03 mm, the hardness of the first coating 201 is 2000-4000 HV0.025, and similarly, the coating is in the color of carbon black in appearance, hydrogen is not contained in the coating, and the metallographic structure of the coating is amorphous. In the embodiment, the outer circular surface of the oil scraping belt 200 is provided with the coating with low friction coefficient, self-lubricating property and hard wear resistance, so that the friction power consumption is further reduced, the wear resistance is improved, and the requirement of long service life of the whole machine is met, for example, for a heavy truck diesel engine, the requirement of the service life of B10 of 200 kilometers can be met.
To further verify the advantages of the DLC coating, as shown in fig. 6, the DLC coating was subjected to wear performance tests with other coatings present, test equipment: fast wear testing machine, rotational speed: 800rpm, Stroke: 110 mm; the engine oil state: six ten-thousandths of 500-mesh Al is mixed in engine oil2O3Abrasive particles, oil rich state; the state of the cylinder sleeve: 110mm cylinder diameter, bainite material, hardness 300HB, flat honingGrinding a reticulate pattern; test loop state: the other states are the same except for different coatings, and the wear resistance is evaluated by checking the difference of the closed gap before and after the test; the test duration is as follows: and (4) 16 h. As can be seen from fig. 6, the wear performance of the selected wear resistant coating of the present invention is significantly better than the wear performance of other coatings of the prior art.
In order to further increase the adhesion stability of the first coating 201 on the outer circumferential surface of the oil scraping belt 200 and prevent the sharp edge from collapsing, a fillet is provided as the transition zone 202 at the upper and lower edges of the oil scraping belt in this embodiment, specifically, the outer corner 101 between the oil scraping belt 200 and the oil ring body 100 includes a first outer fillet surface 1011 connected with the outer circumferential surface of the oil scraping belt 200 and a second outer fillet surface 1012 connecting the first outer fillet surface 1011 with the top surface of the oil ring body 100, the transition zone 202 having a circular arc-shaped cross section is provided at the two edges of the oil scraping belt 200, that is, the transition zone 202 is provided between the edge of the oil scraping belt 200 and the first outer fillet surface 1011, and the circular arc radius of the cross section of the transition zone 202 is 0.005-0.02 mm.
As shown in FIG. 3, in the present embodiment, the inner angle α of the oil scraper ring is 5-10 °, the outer angle β of the oil scraper ring is 10-20 °, and the ratio Ft/d1 of the nominal tangential spring force of the oil ring to the nominal cylinder diameter is 0.20-0.40N/mm, and as a preferred structure, the ratio Ft/d1 of the nominal tangential spring force of the steel oil ring to the nominal cylinder diameter is 0.20-0.30N/mm.
The utility model improves the performance of the oil ring by reducing the width of the working oil belt, improves the strength of the oil ring, reduces the elasticity, reduces the oil consumption and the friction power consumption, further reduces the friction power consumption and improves the wear resistance by the coating with low friction coefficient and self-lubricating property and hard wear resistance on the outer circular surface, and meets the requirement of long service life of the whole machine.
Claims (10)
1. A steel oil ring with low friction and low oil consumption performance comprises an oil ring body (100) and oil scraping belts (200) of the oil ring body (100), wherein the oil scraping belts (200) are outwards convex protrusions arranged on the oil ring body (100), and the two oil scraping belts (200) are arranged on the ring height center line (O) of the oil ring body (100)1) The two sides are symmetrically arranged, and the oil scraper is characterized in that the distance between the two oil scraping belts (200) is equal to the distance between the two oil scraping beltsThe oil ring body (100) has a ring height ratio of 0.35 to 0.5.
2. The steel oil ring with the low-friction and low-engine-oil consumption performance as claimed in claim 1, wherein the outer circumferential surface of the oil scraping belt (200) is provided with a diamond-like carbon coating film with a thickness of 0.01-0.04 mm as the first coating layer (201).
3. The steel oil ring with low-friction and low-engine-oil consumption performance as claimed in claim 1, wherein the thickness of the first coating layer is 0.015 to 0.03mm, and the hardness of the first coating layer is 2000 to 4000HV 0.025.
4. The steel oil ring with the low-friction and low-engine-oil-consumption performance as recited in claim 2, wherein transition belts (202) with circular arc-shaped sections are arranged at two edges of the oil scraping belt (200), and the circular arc radius of the sections of the transition belts (202) is 0.005-0.02 mm.
5. The steel oil ring with low-friction low-engine-oil-consumption performance according to claim 3, wherein the width of the oil scraping belt (200) is 0.05-0.15 mm.
6. The steel oil ring with low-friction low-engine-oil-consumption performance according to claim 5, wherein the height of the protrusion of the oil scraping belt (200) is 0.15-0.3 mm.
7. The steel oil ring with low friction and low engine oil consumption performance as claimed in claim 6, wherein the ratio of the nominal tangential spring force of the oil ring to the nominal cylinder diameter is 0.20-0.40N/mm.
8. The steel oil ring with low friction and low oil consumption performance as claimed in claim 7, wherein the ratio of the nominal tangential spring force of the oil ring to the nominal cylinder diameter is 0.20-0.30N/mm.
9. The steel oil ring having a low-friction low-engine-oil-consumption property as claimed in claim 8, wherein the inner angle α of the oil scraper ring is 5 to 10 °.
10. The steel oil ring with low-friction low-engine-oil consumption performance as claimed in claim 9, wherein the outer angle β of the oil scraper belt is 10 to 20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121549662.6U CN215763239U (en) | 2021-07-08 | 2021-07-08 | Steel oil ring with low-friction and low-engine-oil consumption performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121549662.6U CN215763239U (en) | 2021-07-08 | 2021-07-08 | Steel oil ring with low-friction and low-engine-oil consumption performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215763239U true CN215763239U (en) | 2022-02-08 |
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ID=80104562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121549662.6U Active CN215763239U (en) | 2021-07-08 | 2021-07-08 | Steel oil ring with low-friction and low-engine-oil consumption performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215763239U (en) |
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2021
- 2021-07-08 CN CN202121549662.6U patent/CN215763239U/en active Active
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