CN211500745U - Combined structure of valve and valve seat ring - Google Patents
Combined structure of valve and valve seat ring Download PDFInfo
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- CN211500745U CN211500745U CN201922354135.9U CN201922354135U CN211500745U CN 211500745 U CN211500745 U CN 211500745U CN 201922354135 U CN201922354135 U CN 201922354135U CN 211500745 U CN211500745 U CN 211500745U
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- valve
- exhaust valve
- valve seat
- seat ring
- working surface
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Abstract
The utility model belongs to the technical field of internal combustion engines, and relates to a combined structure of a valve and a valve seat ring, which comprises an engine cylinder cover, wherein an inlet valve head is arranged at an inlet valve of the engine cylinder cover in a matching way, and the inlet valve seat ring is arranged between the inlet valve head and the inlet valve of the engine cylinder cover; the working surface of the lower part of the intake valve seat ring is matched with the working surface of the upper end of the intake valve head part to realize sealing; an exhaust valve head is arranged at an exhaust valve of the engine cylinder cover in a matched mode, and an exhaust valve seat ring is arranged between the exhaust valve head and the exhaust valve of the engine cylinder cover; and the working surface at the lower part of the exhaust valve seat ring is matched with the working surface at the upper end of the head part of the exhaust valve to realize sealing. The combined structure can effectively improve the performance of the engine and ensure the reliability of the engine.
Description
Technical Field
The utility model belongs to the technical field of the internal-combustion engine, a integrated configuration of valve and valve seat circle is related to.
Background
With the continuous progress of the technical level of the engine, the performance index of the engine is continuously improved, emission regulations are continuously upgraded, higher strengthening requirements are provided for related parts, for a pair of friction pairs of a valve and a valve seat ring, the working surface of the friction pair is in a high-temperature and high-pressure gas and waste gas environment for a long time, the highest combustion pressure of the engine can reach 22MPa, the valve seat surface reaches 830 ℃, the working surface temperature of the friction pair reaches 580 ℃, the engine valve and the valve seat ring are in a high-load and high-corrosion working environment, the lubricating and cooling conditions of the friction pair are poor, and the reliability and the service life of the valve and the pair of friction pairs of the valve seat ring are directly influenced. The design of the original valve and the pair of friction pairs of the valve seat ring of the engine is adjusted, the formula of the powder metallurgy valve seat ring is adjusted by combining working and using environments, the hardness difference of the pair of friction pairs is controlled within a reasonable range so as to meet the requirement of strengthening the reliability of the engine, the original structure and the processing technology are not greatly changed, the adaptability is good, the cost performance is considered, and the requirement of commercialization is met.
Disclosure of Invention
The utility model provides an above-mentioned problem, provide a combined structure of valve and valve seat circle, this combined structure can effectively promote the engine performance, ensures the reliability of engine.
According to the technical scheme of the utility model: the utility model provides a combined structure of valve and valve seat insert which characterized in that: the air inlet valve seat ring is arranged between the head part of the air inlet valve and the air inlet valve of the engine cylinder cover; the working surface of the lower part of the intake valve seat ring is matched with the working surface of the upper end of the intake valve head part to realize sealing;
an exhaust valve head is arranged at an exhaust valve of the engine cylinder cover in a matched mode, and an exhaust valve seat ring is arranged between the exhaust valve head and the exhaust valve of the engine cylinder cover; and the working surface at the lower part of the exhaust valve seat ring is matched with the working surface at the upper end of the head part of the exhaust valve to realize sealing.
As a further improvement, the intake valve head is provided with a fixedly connected intake valve rod part, and the exhaust valve head is provided with a fixedly connected exhaust valve rod part.
As a further improvement, the exhaust valve rod part comprises a first rod body part and a second rod body part, the lower end of the first rod body part is connected with the exhaust valve head, and the upper end of the first rod body part is connected with the second rod body part.
As a further improvement of the utility model, the working surface of the inlet valve head and the working surface of the inlet valve seat ring are both conical surfaces, and the angle gamma of the conical surfaces ranges from 118 degrees to 122 degrees.
As a further improvement of the utility model, the working surface of the exhaust valve head and the working surface of the exhaust valve seat ring are conical surfaces, and the angle beta range of the conical surfaces is 88-92 degrees.
As a further improvement, the intake valve and the exhaust valve of the engine cylinder cover are both provided with a nitriding layer on the working surfaces.
The technical effects of the utility model reside in that: the utility model changes the friction pair material of the inlet valve and the inlet valve seat ring, combines the whole soft nitriding, controls the hardness difference between the friction pair within 2-4 units, has the working conical surface angle range of 118-122 degrees, and improves the time-section value when the valve is opened so as to improve the air inlet performance of the engine; the contact surface is increased, the surface pressure is reduced, the contact stress is reduced, and the abrasion resistance is improved.
The utility model discloses with the vice material change of exhaust valve and exhaust valve seat ring friction, combine whole tufftride, hardness difference control is in 2~4 units between the friction is vice, and work conical surface angle scope 88 ~92 has improved anti high temperature nature and resistance to abrasion, and former processing technology is unchangeable, and the technology commonality is good.
The utility model discloses to former valve and valve seat insert friction pair within a definite time, do structural design's partial change, the vice material of adjustment friction, the manufacturability commonality is good, and valve head and pole body adopt different materials to friction weld forms, has reduced the spare part cost promptly, has satisfied the requirement that the engine is reinforceed and national emission regulation again.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of an intake valve.
Fig. 3 is a schematic structural diagram of an exhaust valve.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
As shown in figure 1, the utility model relates to a combined structure of a valve and a valve seat ring, which comprises an engine cylinder cover 7, wherein an inlet valve head 1 is arranged at an inlet valve of the engine cylinder cover 7 in a matching way, and an inlet valve seat ring 3 is arranged between the inlet valve head 1 and the inlet valve of the engine cylinder cover 7; the working surface of the lower part of the intake valve seat ring 3 is matched with the working surface of the upper end of the intake valve head part 1 to realize sealing;
an exhaust valve head part 4 is arranged at an exhaust valve of the engine cylinder cover 7 in a matched mode, and an exhaust valve seat ring 6 is arranged between the exhaust valve head part 4 and the exhaust valve of the engine cylinder cover 7; and the working surface at the lower part of the exhaust valve seat ring 6 is matched with the working surface at the upper end of the exhaust valve head part 4 to realize sealing.
The angle of the working conical surface of the inlet valve head part 1 and the inlet valve seat ring 3 is gamma, the angle range of the gamma is 118-122 degrees, the angle of the working conical surface of the exhaust valve head part 4 and the exhaust valve seat ring 6 is beta, and the angle range of the beta is 88-92 degrees.
As shown in figure 1, the material of the intake valve seat ring 3 in the utility model is powder metallurgy MS90, and the material composition is as follows: 0.7 to 1.5 percent of C, 14.0 to 24.0 percent of Cu, 2.2 to 3.8 percent of Cr, 3.2 to 5.2 percent of Mo, 0.2 to 1.2 percent of Mn, 3.2 to 5.2 percent of W, 6.8 to 10.8 percent of V, 0.05 to 0.5 percent of S, and the rest is less than 3.0 percent; the method is characterized in that the components such as Cu (14% -24%), V (6.8% -10.8%), W (3.2% -5.2%) and the like are added, the component proportion of Cr (2.2% -3.8%), Mo (3.2% -5.2%) and Mn (0.2% -1.2%) is adjusted, and the working cone angle is gamma. And the hardness difference of the exhaust valve and the exhaust valve seat ring 6 friction pair is controlled within 2-4 units.
As shown in FIG. 1, the material of the exhaust valve seat ring 6 of the present invention is powder metallurgy MS07, and the material composition thereof is: 0.7-1.5 percent of C, 10.0-20.0 percent of Cu, 5.2-9.5 percent of Cr, 4.5-9.5 percent of Mo, 5.3-9.0 percent of Co, 1.0-2.4 percent of Ni, and the rest is less than 1.0; the components are increased: cu (10.0% -20.0%), and the adjusted component ratio is as follows: cr (5.2% -9.5%), Ni (1.0% -2.4%), Mo (4.5% -9.5%), Co (5.3% -9.0%), an exhaust valve seat ring 6, a working conical surface beta is 90 degrees, and a beta angle is 88-92 degrees. And controlling the hardness difference of the exhaust valve and the exhaust valve seat ring friction pair within 2-4 units.
As shown in FIG. 2, the material of the inlet valve head part 1 is 5Cr21Mn9Ni4N, the diameter of the head part is a1 (38-42), the thickness of the valve head part is b1 (2.5-4.5), the thickness of the step is c1 (1.6-3.0), the conical surface angle alpha 1 (18-25 degrees) of a head part blank, and the transition fillet R1 (8-15) of the head part and the rod part. The material of the intake valve shaft 2 is 5Cr9Si 3. The whole valve is subjected to soft nitriding, the hardness is greater than HV500, the depth is greater than 0.01mm, a nitriding layer is reserved on the conical surface of the intake valve, the rod end surface is quenched, the hardness is HRC52-58, and the quenched layer is 1.5-4 mm. The working cone angle is gamma.
As shown in FIG. 3, the material of the exhaust valve head part 4 is 6Cr21Mn10MoVNbN, and the material of the exhaust valve rod 5 is 5Cr9Si 3. The valve head comprises a head part diameter a2 (32-40), a valve head part thickness b2 (2.5-4.5), a step thickness c2 (1.6-3.0), a head part blank conical surface angle alpha 2 (22-30 degrees), a head part and rod part connecting part conical surface alpha 3 (3-9 degrees), a diameter d (7.8-8.8), and a transition fillet R2 (8-15) of the head part and the rod part. The valve is wholly soft-nitrided, the hardness is larger than HV500, the depth is larger than 0.01mm, a nitrided layer is reserved on the valve conical surface, the rod end surface is quenched, the hardness is HRC52-58, and the quenched layer is 1.5-4 mm. The angle of the working conical surface is beta, and the angle range of the beta is 88-92 degrees.
The utility model discloses a to former valve and valve seat insert friction pair within a definite time, do structural design's partial change, the vice material of adjustment friction, hardness between the control friction pair is poor, and the manufacturability commonality is good, and valve head and pole body adopt different materials, have reduced the spare part cost, have satisfied the requirement that the engine is reinforceed and has discharged the regulation again.
Claims (6)
1. The utility model provides a combined structure of valve and valve seat insert which characterized in that: the air inlet valve seat ring device comprises an engine cylinder cover (7), wherein an air inlet valve head (1) is arranged at an air inlet valve of the engine cylinder cover (7) in a matched mode, and an air inlet valve seat ring (3) is arranged between the air inlet valve head (1) and the air inlet valve of the engine cylinder cover (7); the working surface of the lower part of the intake valve seat ring (3) is matched with the working surface of the upper end of the intake valve head part (1) to realize sealing;
an exhaust valve head (4) is arranged at an exhaust valve of the engine cylinder cover (7) in a matched mode, and an exhaust valve seat ring (6) is arranged between the exhaust valve head (4) and the exhaust valve of the engine cylinder cover (7); and the lower working surface of the exhaust valve seat ring (6) is matched with the upper working surface of the exhaust valve head (4) to realize sealing.
2. The valve and valve seat insert combination of claim 1, wherein: the intake valve head (1) is fixedly connected with an intake valve rod part (2), and the exhaust valve head (4) is fixedly connected with an exhaust valve rod part (5).
3. A valve and valve seat insert combination as defined in claim 2, wherein: the exhaust valve rod part (5) comprises a first rod body part (5-1) and a second rod body part (5-2), the lower end of the first rod body part (5-1) is connected with the exhaust valve head part (4), and the upper end of the first rod body part (5-1) is connected with the second rod body part (5-2).
4. The valve and valve seat insert combination of claim 1, wherein: the working surface of the inlet valve head (1) and the working surface of the inlet valve seat ring (3) are conical surfaces, and the angle gamma of the conical surfaces ranges from 118 degrees to 122 degrees.
5. The valve and valve seat insert combination of claim 1, wherein: the working surface of the exhaust valve head (4) and the working surface of the exhaust valve seat ring (6) are conical surfaces, and the angle beta of the conical surfaces ranges from 88 degrees to 92 degrees.
6. The valve and valve seat insert combination of claim 1, wherein: and the working surfaces of an inlet valve and an exhaust valve of the engine cylinder cover (7) are both provided with a nitride layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354135.9U CN211500745U (en) | 2019-12-24 | 2019-12-24 | Combined structure of valve and valve seat ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354135.9U CN211500745U (en) | 2019-12-24 | 2019-12-24 | Combined structure of valve and valve seat ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211500745U true CN211500745U (en) | 2020-09-15 |
Family
ID=72419226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922354135.9U Active CN211500745U (en) | 2019-12-24 | 2019-12-24 | Combined structure of valve and valve seat ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211500745U (en) |
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2019
- 2019-12-24 CN CN201922354135.9U patent/CN211500745U/en active Active
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