New type valve seat

Abstract

The invention discloses a novel valve seat ring, which is arranged at the connection between the short intake valve of a diesel engine and the upper intake duct of a stratified intake duct, and the valve seat ring includes a guide body and a guide body; the guide body is arranged at the uppermost part of the valve seat ring, the guide body includes a guide hole, and the guide rod of the short valve is inserted into the guide hole; the guide body is arranged at the lower part of the valve seat ring, and the guide body includes an air guide window, a guide space and an air guide hole; the air guide window is arranged on the side wall of the guide body, and the air guide window faces the upper intake duct of the stratified intake duct and is connected with it; the guide space and the guide hole are coaxially arranged in the guide body, and the guide space is connected with the air guide window; the air guide hole and the guide hole are coaxially arranged at the bottom of the guide body, and the guide hole is connected with the guide space; wherein the short valve and the air guide hole cooperate to control the opening or closing of the air guide hole, thereby controlling the connection or blocking of the upper intake duct of the stratified intake duct with the lower intake duct. In this way, the seat ring structure can be used for air intake diversion.

Description

Technical Field

[0001] The present invention relates to the field of engine design and manufacturing, and particularly to a new type of valve seat ring. Background Art

[0002] The main functions of the valve seat ring are to seal the valve and withstand high-speed impacts, while receiving the heat transmitted from the valve head to dissipate heat from the valve. In addition, it also improves the service life of the engine and facilitates maintenance and replacement.

[0003] The common valve seat ring has an annular structure and is installed at the end of the air passage in the cylinder head. The inner side of the lower part is machined into an inclined surface to cooperate with the valve. The engine intakes air from the top of the seat ring or exhausts air from the bottom, and the air flow passes through the seat ring longitudinally to complete the intake and exhaust functions in the cylinder. This is the role played by the valve seat ring in a traditional two-stroke diesel engine.

[0004] Currently, for this new type of two-stroke diesel engine, which intakes air from the side double-layer air passage, the air flow needs to enter from the upper short air passage, flow to the lower air passage, and then be directed to the supercharging pressure air inlet at the bottom of the cylinder liner. Therefore, at the installation position of the short valve in the upper layer, we need a new structure seat ring that can guide the air flow entering from the upper air passage to the lower air passage. The height of the annular traditional seat ring is relatively small, and it cannot well guide the air flow in the upper air passage, which will affect the intake efficiency and lead to serious deterioration of combustion, thus affecting the engine performance. The seat ring involved in this article combines the functions of sealing and guiding, has an increased height, and has an air inlet on the side.

[0005] The information disclosed in this background art section is only intended to enhance the overall understanding of the present invention and should not be regarded as an admission or any form of implication that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a new type of valve seat ring, which can use the seat ring structure for intake air diversion. Compared with the traditional seat ring as a part of the combustion chamber, it does not need to contact the high-temperature and high-pressure combustion chamber, and greatly reduces the requirements for wear resistance, high heat resistance, and high machining accuracy.

[0007] To achieve the above object, the present invention provides a new type of valve seat ring, which is arranged at the connection of the short intake valve of the diesel engine and the upper intake passage of the stratified intake passage. The valve seat ring includes a guiding body and a fluid guiding body; the guiding body is arranged at the uppermost part of the valve seat ring, and the guiding body includes a guiding hole, and the guiding rod of the short valve is arranged in the guiding hole; the fluid guiding body is arranged at the lower part of the valve seat ring, and the fluid guiding body includes an air guiding window, a fluid guiding space and a fluid guiding hole; the air guiding window is arranged on the side wall of the fluid guiding body, and the air guiding window faces and communicates with the upper intake passage of the stratified intake passage; the fluid guiding space is coaxially arranged in the fluid guiding body and communicates with the air guiding window; the fluid guiding hole is coaxially arranged at the bottom of the fluid guiding body and communicates with the fluid guiding space; wherein the short valve cooperates with the fluid guiding hole to control the opening or closing of the fluid guiding hole, thereby controlling the connection or blockage between the upper intake passage and the lower intake passage of the stratified intake passage.

[0008] In a preferred embodiment, the new type of valve seat ring further includes a sealing groove, which is arranged at the upper part of the fluid guiding body and below the guiding body, and the sealing groove is used to form a sealing structure with the cylinder head through an O-ring.

[0009] In a preferred embodiment, the lower opening of the fluid guiding hole has a flared structure with a larger lower part and a smaller upper part, and the flared structure matches the conical structure of the short valve.

[0010] In a preferred embodiment, the guiding body, the sealing groove, the fluid guiding body, the guiding hole, the fluid guiding space and the fluid guiding hole are all coaxially arranged.

[0011] In a preferred embodiment, the central axis of the air guiding window intersects the central axis of the fluid guiding body perpendicularly.

[0012] In a preferred embodiment, the radial cross-section of the air guiding window is rectangular.

[0013] In a preferred embodiment, when viewed axially from the fluid guiding body, the width of the air guiding window is greater than the diameter of the fluid guiding space, and the extension of the air guiding window into the fluid guiding body exceeds the center line of the fluid guiding body.

[0014] In a preferred embodiment, the fluid guiding body further includes a fluid guiding inclined surface, which is arranged at the upper edge of the air guiding window, and the fluid guiding inclined surface has a structure with a higher outer part and a lower inner part.

[0015] In a preferred embodiment, the top surface of the fluid guiding space is flush with the inner edge of the air guiding window, and the outer edge of the air guiding window is higher than the top surface of the fluid guiding space.

[0016] Compared with the prior art, the new valve seat ring of the present invention has the following beneficial effects: By increasing the height of the deflector and providing air guide windows on the side of the deflector, the air guide windows are connected to the upper intake passage of the stratified intake passage of the short intake valve of the diesel engine. The connection or blockage between the upper intake passage and the lower intake passage of the stratified intake passage is controlled by the cooperation of the short valve and the guide holes at the bottom of the deflector. This new valve seat ring only uses the seat ring structure for intake air diversion. Compared with the traditional seat ring as a part of the combustion chamber, it does not need to contact the high-temperature and high-pressure combustion chamber, greatly reducing the requirements for wear resistance, high heat resistance, and high machining accuracy. In addition, this new valve seat ring can be directly cast by the casting process without using the alloy smelting and die-casting technology, which can greatly reduce the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of a valve seat ring according to an embodiment of the prior art;

[0018] Figure 2 is a schematic installation structure view of the new valve seat ring according to an embodiment of the present invention;

[0019] Figure 3 is a schematic view of the air diversion direction of the new valve seat ring according to an embodiment of the present invention;

[0020] Figure 4 is a schematic front view structure of the new valve seat ring according to an embodiment of the present invention;

[0021] Figure 5 is a schematic left view structure of the new valve seat ring according to an embodiment of the present invention;

[0022] Figure 6 is a schematic right view structure of the new valve seat ring according to an embodiment of the present invention;

[0023] Figure 7 is Figure 6 a sectional view structure at X-X of

[0024] Figure 8 is a schematic top view structure of the new valve seat ring according to an embodiment of the present invention;

[0025] Figure 9 is Figure 8 a sectional view structure at W-W of

[0026] Figure 10 is a schematic bottom view structure of the new valve seat ring according to an embodiment of the present invention;

[0027] Figure 11 is a schematic three-dimensional structure view of the new valve seat ring according to an embodiment of the present invention;

[0028] Figure 12 is Figure 4 a schematic cross-sectional structure view at the Y - Y position of

[0029] Description of main reference numerals:

[0030] 10 - valve seat ring, 1 - guide body, 101 - guide hole, 2 - sealing groove, 3 - fluid guide body, 301 - air guide window, 302 - air guide hole, 303 - fluid guiding space, 304 - fluid guiding inclined surface. Specific embodiments

[0031] The following combines the drawings to describe in detail the specific embodiments of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0032] Unless otherwise clearly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0033] As Figures 2 to 12 shown, a new - type valve seat ring according to a preferred embodiment of the present invention is provided at the connection of the short intake valve of a diesel engine and the upper intake passage of a stratified intake passage. The valve seat ring includes a guide body 1 and a fluid guide body 3; the guide body 1 is arranged at the uppermost part of the valve seat ring 10, the guide body 1 includes a guide hole 101, and the guide rod of the short valve is inserted into the guide hole 101; the fluid guide body 3 is arranged at the lower part of the valve seat ring 10, the fluid guide body 3 includes an air guide window 301, a fluid guiding space 303 and an air guide hole 302; the air guide window 301 is arranged on the side wall of the fluid guide body 3, the air guide window 301 faces and communicates with the upper intake passage of the stratified intake passage; the fluid guiding space 303 is coaxially arranged in the fluid guide body 3 and communicates with the air guide window 301; the air guide hole 302 is coaxially arranged at the bottom of the fluid guide body 3 and communicates with the fluid guiding space 303; wherein the short valve cooperates with the air guide hole 302 to control the opening or closing of the air guide hole 302, thereby controlling the connection or blockage between the upper intake passage and the lower intake passage of the stratified intake passage.

[0034] In some embodiments, the new - type valve seat ring 10 further includes a sealing groove 2 arranged at the upper part of the fluid guide body 3 and below the guide body 1, and the sealing groove 2 is used to form a sealing structure with the cylinder head through an O - ring.

[0035] In some embodiments, the lower opening of the air guide hole 302 has a flared structure with a larger bottom and a smaller top, and the flared structure matches the conical structure of the short valve. The flared structure of the air guide hole 302 should be ground and processed to ensure contact sealing with the conical structure of the short valve.

[0036] In some embodiments, the guide body 1, the sealing groove 2, the fluid guide body 3, the guide hole 101, the fluid guiding space 303, and the air guiding hole 302 are all coaxially arranged in a cylindrical or columnar structure.

[0037] In some embodiments, the central axis of the air guiding window 301 intersects perpendicularly with the central axis of the fluid guide body 3, and the radial cross-section of the air guiding window 301 is rectangular. However, the present invention is not limited thereto, and the cross-sectional shape of the air guiding window may also be circular, oval, or other shapes.

[0038] In some embodiments, when viewed axially from the fluid guide body 3, the width of the air guiding window 301 is greater than the diameter of the fluid guiding space 303, and the extension of the air guiding window into the fluid guide body 3 exceeds the center line of the fluid guide body 3. This design can better introduce the air flow from the air guiding window 301 into the air guiding hole 302 and the lower intake passage.

[0039] In some embodiments, the fluid guide body 3 further includes a fluid guiding inclined surface 304 provided at the upper edge of the air guiding window 301, and the fluid guiding inclined surface 304 has a structure with a higher outer side and a lower inner side. That is to say, the top surface of the fluid guiding space 303 is flush with the inner edge of the air guiding window 301, and the outer edge of the air guiding window 301 is higher than the top surface of the fluid guiding space 303. This structure can be more conducive to the air flow entering the air guiding window 301 from the upper intake passage. This embodiment only shows the case where the fluid guiding inclined surface 304 is provided at the upper edge of the air guiding window 301, but the present invention is not limited thereto. According to actual needs, the fluid guiding inclined surfaces 304 can be provided on all four sides of the air guiding window 301, or it can be regarded that the outer opening of the air guiding window 301 is larger than the inner opening of the air guiding window 301.

[0040] In summary, the new valve seat of the present invention has the following advantages: By increasing the height of the fluid guide body and providing an air guiding window on the side of the fluid guide body, the air guiding window is connected to the upper intake passage of the short intake valve stratified intake passage of the diesel engine, and the connection or blockage between the upper intake passage and the lower intake passage of the stratified intake passage is controlled by the cooperation of the short valve and the guide hole at the bottom of the fluid guide body; This new valve seat only uses the seat ring structure for air intake diversion. Compared with the traditional seat ring as a part of the combustion chamber, it does not need to contact the high-temperature and high-pressure combustion chamber, and the conditions for wear resistance, high heat resistance, and high machining accuracy are greatly reduced; In addition, this new valve seat can be directly cast by the casting process without using the alloy smelting and die-casting technology, which can greatly reduce the manufacturing cost.

[0041] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention, as well as various different selections and modifications. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A new type of valve seat ring is provided at the connection between the short intake valve of a diesel engine and the upper intake passage of a stratified intake passage. It is characterized in that the valve seat ring includes: a guide body provided at the uppermost part of the valve seat ring. The guide body includes a guide hole, and the guide rod of the short valve is inserted into the guide hole; and a fluid guide body provided at the lower part of the valve seat ring. The fluid guide body includes: a gas guide window provided on the side wall of the fluid guide body. The gas guide window faces and communicates with the upper intake passage of the stratified intake passage; a fluid guide space coaxially provided in the fluid guide body with the guide hole. The fluid guide space communicates with the gas guide window; and a gas guide hole coaxially provided at the bottom of the fluid guide body with the guide hole. The gas guide hole communicates with the fluid guide space; wherein the short valve cooperates with the gas guide hole to control the opening or closing of the gas guide hole, and further controls the connection or blockage between the upper intake passage and the lower intake passage of the stratified intake passage; the new type of valve seat ring further includes a sealing groove provided at the upper part of the fluid guide body and below the guide body. The sealing groove is used to form a sealing structure with the cylinder head through an O-ring; the lower opening of the gas guide hole has a flared structure that is larger at the bottom and smaller at the top, and the flared structure matches the conical structure of the short valve.

2. The new type of valve seat ring according to claim 1, it is characterized in that the guide body, the sealing groove, the fluid guide body, the guide hole, the fluid guide space, and the gas guide hole are all coaxially arranged.

3. The new type of valve seat ring according to claim 1, it is characterized in that the central axis of the gas guide window perpendicularly intersects the central axis of the fluid guide body.

4. The new type of valve seat ring according to claim 3, it is characterized in that the radial cross-section of the gas guide window is rectangular.

5. The new type of valve seat ring according to claim 3, it is characterized in that when viewed axially from the fluid guide body, the width of the gas guide window is greater than the diameter of the fluid guide space, and the extension of the gas guide window into the fluid guide body exceeds the center line of the fluid guide body.

6. The new type of valve seat ring according to claim 3, it is characterized in that the fluid guide body further includes a fluid guide slope provided at the upper edge of the gas guide window. The fluid guide slope has a structure that is higher on the outside and lower on the inside.

7. The new type of valve seat ring according to claim 3, it is characterized in that the top surface of the fluid guide space is flush with the inner edge of the gas guide window, and the outer edge of the gas guide window is higher than the top surface of the fluid guide space.

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