High-wear-resistance and corrosion-resistance valve seat for gas engine

Abstract

The utility model provides a gas engine valve seat with high wear resistance and corrosion resistance, which comprises an engine cylinder cover, an exhaust pipe, a valve seat and a spring seat, the exhaust pipe is arranged in the engine cylinder cover, the valve seat is arranged in the exhaust pipe, the top of the valve seat penetrates to the top of the engine cylinder cover, and the spring seat is arranged on the top of the engine cylinder cover. The valve seat is fixedly connected with the bottom of the spring seat, the bottom of the spring seat is fixedly connected with a reset spring, the bottom of the reset spring is fixedly connected with the top of the engine cylinder cover, and a valve guide pipe used in cooperation with the valve seat is fixedly embedded in the top of the engine cylinder cover. The utility model relates to the technical field of gas engine valve seats. According to the high-wear-resistance and corrosion-resistance valve seat for the gas engine, the separation layer is arranged, the corrosion-resistance layer can prevent the valve seat from being corroded, meanwhile, the oxidation-resistance layer can prevent the interior of the valve seat from being oxidized, the wear-resistance layer can reduce abrasion caused by impact, and therefore the service life of the valve seat is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas engine valve seats, in particular to a highly wear-resistant and corrosion-resistant valve seat for a gas engine. Background Art

[0002] The valve seat is a part installed on the cylinder head of an internal combustion engine. Its function is to seal the gas and exhaust gas in the cylinder. When the piston moves upward, the valve closes and seals the combustion chamber so that the mixture or combustion products will not leak out. When the piston moves downward, the valve opens and allows fresh mixture or exhaust gas to enter or leave the combustion chamber. The sealing performance of the valve seat is crucial to the normal operation of the engine. It needs to be checked and replaced frequently to ensure the normal operation of the engine and avoid leakage in the combustion chamber.

[0003] The valve seat in the prior art needs to withstand extremely high frequency impact loads and is prone to wear, which results in a generally short service life of the valve seat and is easily damaged, thereby reducing the practicality of the valve seat. Utility Model Content

[0004] The utility model aims to provide a highly wear-resistant and corrosion-resistant valve seat for a gas engine to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A highly wear-resistant and corrosion-resistant valve seat for a gas engine comprises an engine cylinder head, an exhaust pipe, a valve seat and a spring seat, wherein the exhaust pipe is opened inside the engine cylinder head, the valve seat is located inside the exhaust pipe, the top of the valve seat penetrates to the top of the engine cylinder head and is fixedly connected to the bottom of the spring seat, the bottom of the spring seat is fixedly connected to a return spring, the bottom of the return spring is fixedly connected to the top of the engine cylinder head, a valve guide used in conjunction with the valve seat is fixedly embedded in the top of the engine cylinder head, and a partition layer is provided on the surface of the valve seat to reduce the wear of the valve seat.

[0007] Preferably, the isolation layer comprises an anti-corrosion layer fixedly arranged on the surface of the valve seat, the surface of the anti-corrosion layer is fixedly connected with an anti-oxidation layer, and the surface of the anti-oxidation layer is provided with a wear-resistant layer.

[0008] By setting the isolation layer, the anti-corrosion layer can prevent the valve seat from being corroded, while the anti-oxidation layer can prevent internal oxidation of the valve seat, and the wear-resistant layer can reduce the wear caused by impact, thereby increasing the service life of the valve seat.

[0009] Preferably, a heat insulation layer is fixedly arranged between the wear-resistant layer and the anti-oxidation layer, and the material of the heat insulation layer is aluminum.

[0010] By providing a heat-insulating layer, heat energy can be isolated so that it cannot come into contact with the anti-corrosion layer and the anti-oxidation layer, thereby achieving a heat-insulating effect.

[0011] Preferably, a buffer mechanism is provided at the bottom of the valve seat to reduce the impact force generated when the valve seat is reset;

[0012] The buffer mechanism includes a connecting column fixedly provided with the bottom of the valve seat, four supporting blocks fixedly connected to the surface of the connecting column, a rotating groove is opened on the top of the supporting block, a buffer rod is rotatably connected to the inner wall of the rotating groove, one end of the buffer rod is fixedly connected to a spherical extrusion block, one side of the buffer rod is fixedly connected to a tension spring, and one end of the tension spring is fixedly connected to the surface of the connecting column.

[0013] By setting a buffer mechanism, when the spring seat is squeezed, the valve seat can be driven to move downward and leave the interior of the exhaust pipe. At this time, the gas is discharged from the exhaust pipe. Then, when the spring seat is not squeezed, Figure 1 As shown, the return spring will drive the spring seat and the valve seat to return to their original position, causing the valve seat to move upward and return to its original position. During this process, the buffer mechanism will play a buffering role, thereby causing the valve seat to return to its original position slowly and reducing the impact force.

[0014] Preferably, a spherical sliding groove is provided on the top of the spherical extrusion block, and a spherical block is slidably connected inside the spherical sliding groove.

[0015] By setting the spherical groove and the spherical block, when the reset spring drives the spring seat and the valve seat to reset, the spherical block will contact the bottom of the engine cylinder head and slide under pressure, thereby reducing friction and improving the smoothness of buffering.

[0016] Preferably, rotating shafts are provided on both sides of the buffer rod, and are rotatably connected to the inner wall of the rotating groove through the rotating shafts.

[0017] By setting the rotating shaft, the rotation trajectory of the buffer rod can be limited, and at the same time, a supporting effect is played on the buffer rod.

[0018] Preferably, the material of the corrosion-resistant layer is titanium alloy, the material of the oxidation-resistant layer is niobium-tungsten alloy, and the material of the wear-resistant layer is wear-resistant alloy steel.

[0019] By setting the material of the anti-corrosion layer to titanium alloy, the material of the anti-oxidation layer to niobium tungsten alloy, and the material of the wear-resistant layer to wear-resistant alloy steel, the wear resistance and corrosion resistance of the valve seat can be effectively improved, and the service life of the valve seat can be increased.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model provides a partition layer, wherein the anti-corrosion layer can prevent the valve seat from being corroded, while the anti-oxidation layer can prevent the internal oxidation of the valve seat, and the wear-resistant layer can reduce the wear caused by impact, thereby increasing the service life of the valve seat.

[0022] 2. The utility model can isolate the heat energy by setting the heat insulation layer, so that the heat energy cannot contact with the anti-corrosion layer and the anti-oxidation layer, thereby achieving the heat insulation effect.

[0023] 3. By setting a buffer mechanism, when the spring seat is squeezed, the valve seat can be driven to move downward and leave the exhaust pipe. At this time, the gas is discharged from the exhaust pipe. Then, when the spring seat is not squeezed, Figure 1 As shown, the return spring will drive the spring seat and the valve seat to return to their original position, causing the valve seat to move upward and return to its original position. During this process, the buffer mechanism will play a buffering role, thereby causing the valve seat to return to its original position slowly and reducing the impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0025] Figure 2 It is a schematic diagram of a cross-section of the valve seat of the utility model;

[0026] Figure 3 It is a schematic diagram of the partition layer of the utility model;

[0027] Figure 4 A three-dimensional diagram of a valve seat of the utility model;

[0028] Figure 5 It is a stereoscopic diagram of the buffer rod and the spherical extrusion block of the utility model.

[0029] In the figure: 1. engine cylinder head; 2. exhaust pipe; 3. valve seat; 4. spring seat; 5. return spring; 6. valve guide; 7. partition layer; 8. anti-corrosion layer; 9. anti-oxidation layer; 10. wear-resistant layer; 11. heat insulation layer; 12. support block; 13. rotating groove; 14. buffer rod; 15. spherical extrusion block; 16. tension spring; 17. spherical slide groove; 18. spherical block; 19. rotating shaft; 20. buffer mechanism; 21. connecting column. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0032] Embodiment 1:

[0033] A highly wear-resistant and corrosion-resistant valve seat for a gas engine comprises an engine cylinder head 1, an exhaust pipe 2, a valve seat 3 and a spring seat 4, wherein the exhaust pipe 2 is opened inside the engine cylinder head 1, and the valve seat 3 is located inside the exhaust pipe 2, the top of the valve seat 3 penetrates to the top of the engine cylinder head 1, and is fixedly connected to the bottom of the spring seat 4, a return spring 5 is fixedly connected to the bottom of the spring seat 4, and the bottom of the return spring 5 is fixedly connected to the top of the engine cylinder head 1, a valve guide 6 used in conjunction with the valve seat 3 is fixedly embedded in the top of the engine cylinder head 1, and a partition layer 7 is provided on the surface of the valve seat 3 to reduce the wear of the valve seat 3.

[0034] One implementation of the first embodiment is: the isolation layer 7 includes an anti-corrosion layer 8 fixedly arranged on the surface of the valve seat 3, the surface of the anti-corrosion layer 8 is fixedly connected to an anti-oxidation layer 9, and the surface of the anti-oxidation layer 9 is provided with a wear-resistant layer 10.

[0035] In this embodiment, the valve seat 3 needs to withstand a very high frequency impact load and is prone to wear, which results in a generally short service life of the valve seat and is easily damaged. Therefore, a partition layer 7 is provided, wherein the anti-corrosion layer 8 can prevent the valve seat 3 from being corroded, while the anti-oxidation layer 9 can prevent the internal oxidation of the valve seat 3, and the wear-resistant layer 10 can reduce the wear caused by the impact, thereby increasing the service life of the valve seat 3;

[0036] The problem that the valve seat 3 is prone to wear and tear due to the need to withstand extremely high-frequency impact loads is solved, resulting in the generally short service life of the valve seat 3 and the easy damage.

[0037] The material of the anti-corrosion layer 8 is titanium alloy, the material of the anti-oxidation layer 9 is niobium-tungsten alloy, and the material of the wear-resistant layer 10 is wear-resistant alloy steel.

[0038] In this embodiment, by setting the material of the anti-corrosion layer 8 to titanium alloy, the material of the anti-oxidation layer 9 to niobium tungsten alloy and the material of the wear-resistant layer 10 to wear-resistant alloy steel, the wear resistance and corrosion resistance of the valve seat 3 can be effectively improved, and the service life of the valve seat 3 can be increased.

[0039] Embodiment 2:

[0040] On the basis of Example 1, the isolation layer 7 in this embodiment can effectively improve the wear resistance and corrosion resistance of the valve seat 3, and increase the service life of the valve seat 3, but the anti-corrosion layer 8 and the anti-oxidation layer 9 in the isolation layer 7 are easily damaged under high temperature conditions. In this application, a heat insulation layer 11 is fixedly arranged between the wear-resistant layer 10 and the anti-oxidation layer 9, and the material of the heat insulation layer 11 is aluminum.

[0041] In this embodiment, the anti-corrosion layer 8 and the anti-oxidation layer 9 in the isolation layer 7 are easily damaged under high temperature conditions. Therefore, by providing a heat insulation layer 11, the heat energy can be isolated so that it cannot contact the anti-corrosion layer 8 and the anti-oxidation layer 9, thereby achieving a heat insulation effect.

[0042] The problem that the anti-corrosion layer 8 and the anti-oxidation layer 9 in the isolation layer 7 are easily damaged under high temperature conditions is solved.

[0043] Embodiment three:

[0044] On the basis of the first embodiment, the heat insulation layer 11 in this embodiment can isolate high temperature and protect the anti-corrosion layer 8 and the anti-oxidation layer 9. However, considering that the heat insulation layer 11 is made of aluminum, it is easy to be damaged by high-intensity impact. In this application, a buffer mechanism 20 is provided at the bottom of the valve seat 3 to reduce the impact force generated when the valve seat 3 is reset;

[0045] The buffer mechanism 20 includes a connecting column 21 fixedly provided at the bottom of the valve seat 3, four support blocks 12 are fixedly connected to the surface of the connecting column 21, a rotating groove 13 is opened on the top of the support block 12, a buffer rod 14 is rotatably connected to the inner wall of the rotating groove 13, one end of the buffer rod 14 is fixedly connected to a spherical extrusion block 15, one side of the buffer rod 14 is fixedly connected to a tension spring 16, and one end of the tension spring 16 is fixedly connected to the surface of the connecting column 21.

[0046] In this embodiment, the heat insulating layer 11 is made of aluminum and is easily damaged by high-intensity impact. Therefore, a buffer mechanism 20 is provided to enable the spring seat 4 to be squeezed and drive the valve seat 3 to move downward and leave the interior of the exhaust pipe 2. At this time, the gas is discharged from the exhaust pipe 2. After that, when the spring seat 4 is not squeezed, the valve seat 3 is moved downward and away from the interior of the exhaust pipe 2. Figure 1 As shown, the return spring 5 drives the spring seat 4 and the valve seat 3 to return to their original positions, so that the valve seat 3 moves upward to return to its original position. During this process, the spherical block 18 contacts the bottom of the engine cylinder head 1 and slides under compression, while driving the buffer rod 14 to rotate around the rotating shaft 19. During the rotation, the tension spring 16 is pulled into a stretched state. When the tension spring 16 is stretched, the forces between the two are offset to a certain extent, thereby causing the valve seat 3 to return to its original position slowly, reducing the impact force.

[0047] The problem that the heat insulation layer 11 is easily damaged by high-intensity impact is solved.

[0048] Preferably, a spherical slide groove 17 is provided on the top of the spherical extrusion block 15 , and a spherical block 18 is slidably connected inside the spherical slide groove 17 .

[0049] In this embodiment, by providing the spherical groove 17 and the spherical block 18, when the reset spring 5 drives the spring seat 4 and the valve seat 3 to reset, the spherical block 18 will contact the bottom of the engine cylinder head 1 and slide under pressure, thereby reducing friction and improving the smoothness of buffering.

[0050] Preferably, a rotating shaft 19 is provided on both sides of the buffer rod 14 , and the buffer rod 14 is rotatably connected to the inner wall of the rotating groove 13 via the rotating shaft 19 .

[0051] In this embodiment, by providing the rotating shaft 19 , the rotation trajectory of the buffer rod 14 can be limited, and at the same time, the buffer rod 14 can be supported.

[0052] Working principle: When the spring seat 4 is squeezed, it drives the valve seat 3 to move downward and leave the exhaust pipe 2. At this time, the gas is discharged from the exhaust pipe 2. Then, when the spring seat 4 is not squeezed, Figure 1 As shown, the return spring 5 drives the spring seat 4 and the valve seat 3 to return to their original positions, so that the valve seat 3 moves upward to return to its original position. During this process, the spherical block 18 contacts the bottom of the engine cylinder head 1 and slides under compression, while driving the buffer rod 14 to rotate around the rotating shaft 19. During the rotation, the tension spring 16 is pulled into a stretched state. When the tension spring 16 is stretched, the forces between the two are offset to a certain extent, thereby causing the valve seat 3 to return to its original position slowly, reducing the impact force.

[0053] At the same time, the anti-corrosion layer 8 in the isolation layer 7 can prevent the valve seat 3 from being corroded, the anti-oxidation layer 9 can prevent the internal oxidation of the valve seat 3, and the wear-resistant layer 10 can reduce the wear caused by impact, thereby increasing the service life of the valve seat 3;

[0054] Furthermore, the heat insulation layer 11 can isolate the heat energy so that it cannot contact with the anti-corrosion layer 8 and the anti-oxidation layer 9, thereby achieving a heat insulation effect.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly wear-resistant and corrosion-resistant valve seat for a gas engine, comprising an engine cylinder head (1), an exhaust pipe (2), a valve seat (3) and a spring seat (4), wherein the exhaust pipe (2) is opened inside the engine cylinder head (1), the valve seat (3) is located inside the exhaust pipe (2), the top of the valve seat (3) penetrates to the top of the engine cylinder head (1), and is fixedly connected to the bottom of the spring seat (4), characterized in that: The bottom of the spring seat (4) is fixedly connected to a return spring (5), the bottom of the return spring (5) is fixedly connected to the top of the engine cylinder head (1), the top of the engine cylinder head (1) is fixedly embedded with a valve guide (6) used in conjunction with the valve seat (3), and the surface of the valve seat (3) is provided with a partition layer (7), which can reduce the wear of the valve seat (3).

2. A highly wear-resistant and corrosion-resistant gas engine valve seat according to claim 1, characterized in that: The isolation layer (7) comprises an anti-corrosion layer (8) fixedly arranged on the surface of the valve seat (3), the surface of the anti-corrosion layer (8) is fixedly connected to an anti-oxidation layer (9), and the surface of the anti-oxidation layer (9) is provided with a wear-resistant layer (10).

3. The highly wear-resistant and corrosion-resistant gas engine valve seat according to claim 2, characterized in that: A heat insulation layer (11) is fixedly arranged between the wear-resistant layer (10) and the anti-oxidation layer (9), and the material of the heat insulation layer (11) is aluminum.

4. The highly wear-resistant and corrosion-resistant gas engine valve seat according to claim 3, characterized in that: A buffer mechanism (20) is provided at the bottom of the valve seat (3) to reduce the impact force generated when the valve seat (3) is reset; The buffer mechanism (20) comprises a connecting column (21) fixedly provided with the bottom of the valve seat (3), the surface of the connecting column (21) being fixedly connected with four support blocks (12), the top of the support block (12) being provided with a rotation groove (13), the inner wall of the rotation groove (13) being rotationally connected with a buffer rod (14), one end of the buffer rod (14) being fixedly connected with a spherical extrusion block (15), one side of the buffer rod (14) being fixedly connected with a tension spring (16), one end of the tension spring (16) being fixedly connected with the surface of the connecting column (21).

5. The highly wear-resistant and corrosion-resistant gas engine valve seat according to claim 4, characterized in that: A spherical sliding groove (17) is provided on the top of the spherical extrusion block (15), and a spherical block (18) is slidably connected inside the spherical sliding groove (17).

6. The highly wear-resistant and corrosion-resistant gas engine valve seat according to claim 4, characterized in that: Rotating shafts (19) are provided on both sides of the buffer rod (14), and the buffer rod (14) is rotatably connected to the inner wall of the rotating groove (13) via the rotating shafts (19).

7. The highly wear-resistant and corrosion-resistant gas engine valve seat according to claim 2, characterized in that: The material of the anti-corrosion layer (8) is titanium alloy, the material of the anti-oxidation layer (9) is niobium-tungsten alloy, and the material of the wear-resistant layer (10) is wear-resistant alloy steel.

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