Valve seat ring, cylinder cover and engine

Abstract

The utility model relates to the technical field of engines, and discloses a valve seat ring, a cylinder cover and an engine. The valve seat ring comprises a seat ring body, the seat ring body is provided with a seat ring through hole and a sealing conical surface hole used for being matched with a taper surface of a valve, the sealing conical surface hole and the seat ring through hole are coaxially arranged, and the sealing conical surface hole is formed in the lower end of the seat ring through hole; the size of the lower end of the sealing conical hole is larger than that of the upper end of the sealing conical hole, and the inner wall of the seat ring through hole is in smooth transition connection with the inner wall of the sealing conical hole. The valve seat ring is high in matching precision with a cylinder cover and a valve, meanwhile, excessive abrasion of the valve and the valve seat ring can be reduced, the air tightness of the valve and the valve seat ring can be improved, and the service life is prolonged. Meanwhile, the inner wall of the seat ring through hole is in smooth transition connection with the inner wall of the sealing conical surface hole, the inner contour of the seat ring body is overall smooth, flow separation of gas flowing through the seat ring body caused by the sharp inner contour can be avoided, and therefore the flowing state of the gas can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and particularly relates to a valve seat ring, a cylinder head and an engine. Background Art

[0002] Each cylinder of a fuel engine is equipped with an intake valve and an exhaust valve. During the working cycle of each cylinder, the intake valve and the exhaust valve are opened and closed in a certain order to ensure that fresh charge can enter the cylinder in time and the exhaust gas can be discharged in time. Among them, the valve seat ring is one of the main components that cooperate with the valve. A conical hole that matches the valve taper surface is formed on the valve seat ring, and the opening or closing of the intake passage is realized through the up and down movement of the valve. When the gas flows in / out of the air passage, the valve seat ring will affect the smoothness of the gas flow, thereby affecting the overall performance of the engine.

[0003] Therefore, how to provide a valve seat ring that can improve the smoothness of gas flow is an urgent problem to be solved. Summary of the Utility Model

[0004] The utility model provides a valve seat ring, a cylinder head and an engine, which are used to improve the smoothness of gas flow of the valve seat ring.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] In a first aspect, the present application provides a valve seat ring, including: a seat ring body, the seat ring body is provided with a seat ring through hole and a sealing conical hole for cooperating with the taper surface of the valve, the sealing conical hole is coaxially arranged with the seat ring through hole and is arranged at the lower end of the seat ring through hole; the lower end dimension of the sealing conical hole is larger than the upper end dimension of the sealing conical hole, and the inner wall of the seat ring through hole is smoothly connected to the inner wall of the sealing conical hole in a transitional manner.

[0007] In the above valve seat ring, the valve seat ring includes a seat ring body. Specifically, the seat ring body is provided with a seat ring through hole and a sealing conical hole. The sealing conical hole is coaxially arranged with the seat ring through hole and is arranged at the lower end of the seat ring through hole. The inner wall of the seat ring through hole is smoothly connected to the inner wall of the sealing conical hole in a transitional manner, and the overall inner contour of the seat ring body is smooth, which can avoid the gas flow separation of the gas flowing through the seat ring body caused by the sharp inner contour. At the same time, the sealing conical hole cooperates with the valve, and the lower end dimension of the sealing conical hole is larger than the upper end dimension of the sealing conical hole. This structural setting can effectively improve the matching accuracy between the valve seat ring provided by the present application and the cylinder head and the valve, and at the same time can reduce the excessive wear between the valve and the valve seat ring, improve the airtightness between the valve and the valve seat ring, and extend the service life.

[0008] Therefore, the valve seat ring provided by the present application can improve the smoothness of the internal flowing gas during the flow.

[0009] Preferably, the sealing conical surface is used to cooperate with the conical surface of the intake valve, and the angle between the sealing conical surface and the axis is 65°.

[0010] Preferably, the sealing conical surface is used to cooperate with the conical surface of the exhaust valve, and the angle between the sealing conical surface and the axis is 60°.

[0011] In a second aspect, the present application provides a cylinder head, comprising a cylinder head body and a valve seat ring as described in any one of the above items, wherein an intake duct and an exhaust duct are provided in the cylinder head body, an air outlet of the intake duct and an air inlet of the exhaust duct are located on the fire surface side of the cylinder head body, and the air outlet of the intake duct and / or the air inlet of the exhaust duct are provided with the valve seat ring provided by the technical solution in the above first aspect.

[0012] Preferably, the air inlet passage is a filling air passage, and the filling air passage comprises a vertical extension section whose extension direction is perpendicular to the fire surface of the cylinder head body, and the vertical extension section is used to make the flow direction of the gas flowing out of the air outlet perpendicular to the fire surface of the cylinder head body.

[0013] Preferably, the cylinder head body is provided with an eccentric chamfer at the edge of the air outlet of the air inlet passage.

[0014] Preferably, the exhaust duct is a filling air duct, which includes a horizontal extension section and a vertical extension section, the horizontal extension section is connected to the vertical extension section, and the horizontal extension section is transitionally connected to the vertical extension section; the end of the vertical extension section facing away from the horizontal extension section forms an air inlet of the exhaust duct, and the cross-section of the vertical extension section near the horizontal extension section is larger than the cross-section of the vertical extension section away from the horizontal extension section.

[0015] In a third aspect, the present application also provides an engine, comprising any cylinder head provided by the technical solution in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a valve seat ring provided in an embodiment of the present application;

[0017] Figure 2 Another structural schematic diagram of a valve seat ring provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of the air intake passage in the cylinder head provided in an embodiment of the present application;

[0019] Figure 4 A schematic diagram of the structure of the air intake passage in the cylinder head provided in an embodiment of the present application from another angle;

[0020] Figure 5Schematic diagram of the exhaust passage structure in the cylinder head provided by the embodiment of the present application;

[0021] Figure 6 Simulation diagram of the flow coefficient of the intake passage provided by the embodiment of the present application and that of the prior art;

[0022] Figure 7 Simulation diagram of the flow coefficient of the exhaust passage provided by the embodiment of the present application and that of the prior art. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] The embodiment of the present application provides a valve seat ring. It should be understood that since this valve seat ring can cooperate with an intake valve or an exhaust valve, and the sizes of the intake valve and the exhaust valve may be the same or different, the valve seat ring cooperating with the intake valve and the valve seat ring cooperating with the exhaust valve may be the same or different.

[0025] Exemplarily, taking the valve seat ring provided by the embodiment of the present application cooperating with the intake valve as an example for illustration. Please refer to Figure 1 As shown in the structure, the valve seat ring provided by the embodiment of the present application includes: a seat ring body 1, and the seat ring body 1 is provided with a seat ring through hole 11 and a sealing tapered hole 12 for cooperating with the tapered surface of the valve.

[0026] It should be noted that, in order to clearly show the structures of the seat ring through hole 11 and the sealing tapered hole 12, the seat ring through hole 11 and the sealing tapered hole 12 are schematically illustrated by a dotted line a here, but it is not limited thereto.

[0027] Please continue to refer to Figure 1 As shown in the structure, the sealing tapered hole 12 is coaxially arranged with the seat ring through hole 11 and is provided at the lower end of the seat ring through hole 11; the lower end size of the sealing tapered hole 12 is larger than the upper end size of the sealing tapered hole 12, and the inner wall of the seat ring through hole 11 is smoothly connected to the inner wall of the sealing tapered hole 12 in a transitional manner.

[0028] In the above valve seat ring, the valve seat ring includes a seat ring body 1. Specifically, the seat ring body 1 is provided with a seat ring through hole 11 and a sealing tapered hole 12. The sealing tapered hole 12 is coaxially arranged with the seat ring through hole 11 and is provided at the lower end of the seat ring through hole 11. The inner wall of the seat ring through hole 11 is smoothly transitionally connected to the inner wall of the sealing tapered hole 12, and the overall internal contour of the seat ring body 1 is smooth, which can avoid the gas flow separation of the gas flowing through the seat ring body 1 caused by sharp internal contours.

[0029] At the same time, the sealing tapered hole 12 cooperates with the valve. The size of the lower end of the sealing tapered hole 12 is larger than the size of the upper end of the sealing tapered hole 12. This structural setting can effectively improve the fitting accuracy between the valve seat ring provided by the embodiment of the present application and the cylinder head and the valve. At the same time, it can reduce the excessive wear between the valve and the valve seat ring, improve the airtightness between the valve and the valve seat ring, and extend the service life.

[0030] In addition, the valve seat ring provided by the embodiment of the present application has a simple process and is relatively easy to control the process consistency.

[0031] Therefore, the valve seat ring provided by the present application can improve the smoothness of the internal flowing gas during flow.

[0032] On the basis of the above technical solution, when the sealing tapered hole 12 cooperates with the tapered surface of the intake valve, for example, please continue to refer to Figure 1 the structure shown, and the included angle b between the sealing tapered hole 12 and the axis can be set to 65°.

[0033] It should be noted that when the sealing tapered hole 12 cooperates with the tapered surface of the exhaust valve, please refer to Figure 2 、 Figure 3 the structure shown. For example, the included angle b between the sealing tapered hole 12 and the axis can be set to 60°.

[0034] In a second aspect, the present application further provides a cylinder head, including a cylinder head body and the valve seat ring as described in any one of the above. An intake passage and an exhaust passage are provided in the cylinder head body. The outlet of the intake passage and the inlet of the exhaust passage are located on one side of the firing surface of the cylinder head body, and the outlet of the intake passage and / or the inlet of the exhaust passage is provided with the valve seat ring provided by the technical solution in the first aspect above.

[0035] It should be noted that the valve seat ring provided by the embodiment of the present application can be set at the outlet of the intake passage and / or the inlet of the exhaust passage as needed. Specifically, it can be at least divided into the following implementation methods;

[0036] Method 1: The valve seat ring provided by the embodiment of the present application is set at the outlet of the intake passage;

[0037] Method 2: The valve seat ring provided by the embodiment of the present application is set at the inlet of the exhaust passage;

[0038] Mode 3: The valve seat ring provided by the embodiment of the present application is arranged at the air outlet of the intake passage, and the valve seat ring provided by the embodiment of the present application is arranged at the air inlet of the exhaust passage.

[0039] Certainly, since the cylinder head provided by the embodiment of the present application adopts the valve seat ring provided by the above technical solution, the cylinder head provided by the embodiment of the present application can effectively improve the fitting accuracy between the valve seat ring, the cylinder head and the valve, reduce the excessive wear between the valve and the valve seat ring, improve the air tightness between the valve and the valve seat ring, and extend the service life. At the same time, the inner wall of the seat ring through hole is smoothly transitionally connected to the inner wall of the sealing cone hole, and the overall inner contour of the seat ring body is smooth, which can avoid the gas flow separation of the gas flowing through the seat ring body caused by the sharp inner contour.

[0040] Based on the above technical solution, please refer to Figure 3 the structure shown in the figure. The intake passage 2 is a filling passage, and the filling passage includes a vertical extension section 21 whose extending direction is perpendicular to the firing surface of the cylinder head body. The vertical extension section 21 is used to make the gas in the intake passage 2 flow out along the Figure 3 arrow direction in the figure. Specifically, the flow direction of the gas flowing out of the intake passage 2 is perpendicular to the firing surface of the cylinder head body, which can reduce the air flow interference.

[0041] Based on the above technical solution, the cylinder head body may also be provided with an eccentric chamfer at the edge of the air outlet of the intake passage 2. The eccentric chamfer is used to generate a vortex.

[0042] Based on the above technical solution, please refer to Figure 4 the structure shown in the figure. The exhaust passage 3 is a filling passage, and the filling passage includes a horizontal extension section 31 and a vertical extension section 32. The horizontal extension section 31 is communicated with the vertical extension section 32, and the horizontal extension section 31 and the vertical extension section 32 are transitionally connected; one end of the vertical extension section 32 departing from the horizontal extension section 31 forms the air inlet of the exhaust passage 3, and the cross-section of the vertical extension section 32 near the horizontal extension section 31 is larger than the cross-section of the vertical extension section 32 far from the horizontal extension section 31.

[0043] It should be understood that increasing the transition fillet at the connection between the horizontal extension section 31 and the vertical extension section 32 in the exhaust passage 3 can increase the flow area of the exhaust passage 3.

[0044] In order to clearly show the improvement of the structure effect of the intake passage 2 and the exhaust passage 3 in the cylinder head provided by the embodiment of the present application compared with the prior art, the FEV flow coefficient method is now used to perform simulation calculations on the intake passage 2 and the exhaust passage 3 in the cylinder head provided by the embodiment of the present application and the structures in the prior art.

[0045] Figure 5It is a simulation diagram of the intake passage flow coefficient. Among them, line d represents the intake passage 2 provided by the embodiment of the present application, and line e represents the intake passage in the prior art. As Figure 6 shown in the structure, the large lift flow coefficient of the intake passage 2 provided by the embodiment of the present application is significantly increased, the medium and low lift flow coefficients are decreased, and the swirl intensity is decreased. Figure 6 It is a simulation diagram of the exhaust passage flow coefficient. Among them, line f represents the exhaust passage 3 provided by the embodiment of the present application, and line g represents the intake passage in the prior art. As Figure 7 shown in the structure, the large lift flow coefficient in the exhaust passage 3 provided by the embodiment of the present application is greatly increased, and the flow coefficient at the maximum valve lift has reached the level of a parallel airway.

[0046] In a third aspect, the present application further provides an engine, including any one of the cylinder heads provided by the technical solution in the second aspect.

[0047] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A valve seat ring, characterized in that, include: A seat ring body, wherein the seat ring body is provided with a seat ring through hole and a sealing cone surface hole for cooperating with the tapered surface of the valve, the sealing cone surface hole is coaxially arranged with the seat ring through hole and is arranged at the lower end of the seat ring through hole; the lower end size of the sealing cone surface hole is larger than the upper end size of the sealing cone surface hole, and the inner wall of the seat ring through hole is smoothly transitionally connected to the inner wall of the sealing cone surface hole.

2. The valve seat ring according to claim 1, wherein The sealing conical surface is used to cooperate with the conical surface of the intake valve, and the angle between the sealing conical surface and the axis is 65°.

3. The valve seat ring according to claim 1, characterized in that, The sealing conical surface is used to cooperate with the conical surface of the exhaust valve, and the angle between the sealing conical surface and the axis is 60°.

4. A cylinder head, characterized in that, It comprises a cylinder head body and a valve seat ring as described in any one of claims 1 to 3, wherein an intake duct and an exhaust duct are provided in the cylinder head body, an air outlet of the intake duct and an air inlet of the exhaust duct are located on the fire surface side of the cylinder head body, and the air outlet of the intake duct and / or the air inlet of the exhaust duct are provided with the valve seat ring as described in claim 1.

5. The cylinder head according to claim 4, characterized in that, The air inlet passage is a filling air passage, and the filling air passage includes a vertical extension section whose extension direction is perpendicular to the fire surface of the cylinder head body, and the vertical extension section is used to make the flow direction of the gas flowing out of the air outlet perpendicular to the fire surface of the cylinder head body.

6. The cylinder head according to claim 5, characterized in that, The cylinder head body is provided with an eccentric chamfer at the edge of the air outlet of the air inlet passage.

7. The cylinder head according to any one of claims 4-6, characterized in that, The exhaust duct is a filling air duct, which includes a horizontal extension section and a vertical extension section. The horizontal extension section is connected to the vertical extension section, and the horizontal extension section is transitionally connected to the vertical extension section. The end of the vertical extension section facing away from the horizontal extension section forms an air inlet of the exhaust duct, and the cross-section of the vertical extension section near the horizontal extension section is larger than the cross-section of the vertical extension section away from the horizontal extension section.

8. An engine, characterized in that, Comprising a cylinder head as described in any one of claims 4 to 6.

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