Valve seat structure of engine cylinder head

Abstract

The invention discloses a valve seat structure of an engine cylinder head, which belongs to the technical field of valve seats and comprises a cylinder body provided with a mounting groove. A valve body is arranged on the air cylinder main body, and the lower end of the valve body is detachably inserted into the mounting groove; a mounting groove is formed in the valve body, a sealing ring used for sealing the connecting position of the valve body and the air cylinder body is arranged in the mounting groove, a groove with a V-shaped cross section is formed in the sealing ring, an annular piece is arranged in the groove, the lower side face of the annular piece is attached to the inner wall of the groove, and a first annular plate is fixed to the side wall of the valve body; acting force is applied to the sealing ring through the first annular plate and the annular piece, so that the sealing ring deforms in three directions, the inner wall and the outer wall of the sealing ring tightly abut against the outer wall of the valve body and the inner wall of the mounting groove correspondingly, and primary sealing is formed. And secondly, due to the elastic piece design of the annular piece, the sealing ring is more tightly attached to the side wall of the valve body through extrusion, and the sealing effect is further enhanced.

Description

Technical Field

[0001] This invention relates to a valve seat structure for an engine cylinder head, belonging to the field of valve seat technology. Background Technology

[0002] During engine operation, the valve body structure of the cylinder head plays a crucial role in the engine's performance and stability. The sealing performance at the connection between the valve body and the cylinder block directly affects the engine's intake, exhaust efficiency, and combustion effect. Poor sealing can lead to gas leakage, reduced engine power, increased fuel consumption, and even engine malfunction. Therefore, a valve seat structure for the engine cylinder head is proposed. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a valve seat structure for an engine cylinder head that achieves efficient sealing at the connection between the valve body and the cylinder body.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a valve seat structure for an engine cylinder head, comprising: A cylinder body, on which a mounting groove is provided; The valve body is mounted on the cylinder body, and the lower end of the valve body is detachably inserted into the mounting groove. A sealing ring is provided in the mounting groove. The outer wall of the sealing ring abuts against the inner wall of the mounting groove, and the inner wall of the sealing ring abuts against the outer wall of the valve body. It is used to seal the connection between the valve body and the cylinder body. The sealing ring has a groove with a "V" shaped cross-section, and an annular component is provided in the groove. The lower side of the annular component is attached to the inner wall of the groove, and a first annular plate is fixed on the side wall of the valve body. When the valve body is installed in the mounting slot, the first ring plate presses down on the annular part.

[0005] Preferably, the annular component includes a ring, and the ring has a plurality of U-shaped spring pieces distributed circumferentially, with gaps between adjacent spring pieces; The spring sheet has a curved portion near one end of the valve body. The curved portion bends downward and abuts against the upper surface of the sealing ring. A compression wall for compressing the curved end is provided on the side wall of the first ring plate.

[0006] Preferably, a pressure plate is provided between the sealing ring and the bent end of the spring sheet.

[0007] Preferably, the ring and the spring are manufactured using an integral process.

[0008] Preferably, the ring and the spring are fixed in the groove of the sealing ring.

[0009] Preferably, a connecting flange is fixedly connected to the outer wall of the valve body, and the first ring plate is fixedly connected to the lower surface of the connecting flange.

[0010] Preferably, the mounting groove is provided with an annular groove, one side of which is close to the side wall of the valve body, and a sealing ring lip is fixedly connected to the inner side of the sealing ring. When the sealing ring is installed into the mounting groove, the sealing ring lip is in the groove.

[0011] Preferably, a second ring plate for pressing the sealing ring lip into the groove is fixedly connected to the side wall of the valve body, and the bottom of the second ring plate is provided with a protrusion; When the valve body is installed in the mounting groove, the protrusion abuts against the sealing ring lip.

[0012] Preferably, the first ring plate and the second ring plate are fixedly installed inside the valve body by bolts.

[0013] Compared with existing technologies: 1. This invention applies force to the sealing ring through the first annular plate and the annular component, causing it to deform in three directions. This allows the inner and outer walls of the sealing ring to tightly abut against the outer wall of the valve body and the inner wall of the mounting groove, respectively, forming a preliminary seal. Secondly, the spring-loaded design of the annular component, through compression, makes the sealing ring fit even more tightly against the side wall of the valve body, further enhancing the sealing effect.

[0014] 2. This invention forms another layer of sealing defense through the cooperation of the sealing ring lip, the groove, and the protrusion of the second ring plate. This multi-layered sealing design works synergistically to effectively prevent gas leakage, significantly improve the engine's sealing performance, thereby improving the engine's intake and exhaust efficiency, enhancing combustion, reducing fuel consumption, and improving the overall performance of the engine.

[0015] 3. This invention achieves fit and sealing between components by placing the sealing ring into the mounting groove, inserting the lower end of the valve body into the mounting groove, and moving the connecting flange by tightening the bolts. When maintenance or replacement of components is required, simply loosening the bolts allows for easy disassembly of the valve body and related components, enabling inspection, repair, or replacement of the sealing ring, annular components, etc. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0018] Figure 3 For the present invention Figure 2 Enlarged view of point A.

[0019] Figure 4 This is an exploded cross-sectional view of the cylinder body, valve body, and sealing ring of the present invention.

[0020] Figure 5 For the present invention Figure 4 Enlarged view of point B.

[0021] Figure 6 For the present invention Figure 4 Enlarged view of point C.

[0022] Figure 7 This is an exploded cross-sectional view of the sealing ring, ring, spring sheet, and pressure plate of the present invention.

[0023] Figure 8 This is an exploded cross-sectional view of the valve body, the first ring plate, and the second ring plate of the present invention.

[0024] In the picture: 1. Cylinder body, 101. Mounting groove, 102. Settling groove, 2. Valve body, 201. Connecting flange, 3. Sealing ring, 301. Groove, 302. Sealing ring lip, 4. Annular component, 401. Ring, 402. Spring, 5. First ring plate, 501. Extrusion wall, 6. Pressure plate, 7. Second ring plate, 8. Connecting rod, 801. Top plate, 9. Sealing base, 10. Valve spring. Detailed Implementation

[0025] The present invention is illustrated below with specific embodiments, but these are not intended to limit the invention.

[0026] Example 1 like Figures 1-8 As shown in this embodiment, a valve seat structure for an engine cylinder head is provided, including a cylinder body 1. The cylinder body 1 serves as the foundation of the entire structure and has a mounting groove 101 for mounting a valve body 2. The lower end of the valve body 2 is detachably inserted into the mounting groove 101 for easy installation, disassembly, and maintenance. A sealing ring 3 is provided within the mounting groove 101, playing a crucial sealing role. Its outer wall tightly abuts against the inner wall of the mounting groove 101, while its inner wall abuts against the outer wall of the valve body 2, effectively preventing air leakage at the connection between the valve body 2 and the cylinder body 1.

[0027] A "V"-shaped groove 301 is formed on the sealing ring 3. An annular component 4 is disposed within the groove 301, with its lower side surface fitting against the inner wall of the groove 301. A first annular plate 5 is fixed to the side wall of the valve body 2. When the valve body 2 is installed into the mounting groove 101, the first annular plate 5 exerts a downward pressing force on the annular component 4. Under this pressing force, the sealing ring 3 will deform, such as... Figure 3As indicated by the arrows, deformation occurs in three directions: vertical downwards, towards the outer wall of valve body 2, and towards the inner wall of mounting groove 101. This multi-directional deformation causes the inner wall of sealing ring 3 to press more tightly against the outer wall of valve body 2, and the outer wall to press more tightly against the inner wall of mounting groove 101, thus achieving a preliminary sealing effect.

[0028] A connecting rod 8 is installed in the middle of the valve body 2. The lower end of the connecting rod 8 is fixedly connected to the sealing base 9. A top plate 801 is provided on the upper part of the connecting rod 8. A valve spring 10 is provided between the top plate 801 and the valve body 2. During engine operation, the valve spring 10 can provide the necessary elastic force for the opening and closing of the valve, ensuring that the valve can accurately act according to the working requirements and ensuring the normal operation of the engine.

[0029] Example 2 like Figures 2-4 , Figure 7 and Figure 8 As shown, based on Embodiment 1, in this embodiment, in order to further ensure that the inner wall of the sealing ring 3 is tightly pressed against the outer wall of the valve body 2, the annular component 4 has been optimized. The purpose is to further enhance the sealing performance between the inner wall of the sealing ring 3 and the outer wall of the valve body 2.

[0030] The optimized annular component 4 includes a ring 401, on which multiple U-shaped spring pieces 402 are distributed circumferentially, with gaps between adjacent spring pieces 402. The end of the spring piece 402 near the valve body 2 is bent downward and abuts against the bent end on the upper surface of the sealing ring 3. A compression wall 501 for compressing the bent end is provided on the side wall of the first annular plate 5.

[0031] A pressure plate 6 is provided between the curved end of the sealing ring 3 and the spring piece 402. The pressure plate 6 abuts against the surface of the sealing ring 3, and its function is to uniformly press the surface of the sealing ring 3 to prevent the sealing ring 3 from deforming upward under pressure, thereby ensuring that the sealing ring 3 can better perform its sealing function. The ring 401 and the spring piece 402 are manufactured using an integral process. This manufacturing method ensures the integrity and stability of the structure, reduces the connection points between components, and lowers the probability of failure. The ring 401 and the spring piece 402 are fixed in the groove 301 of the sealing ring 3. The fixing method is glue fixing. This fixing method is simple to operate and can achieve a good fixing effect, ensuring the stable installation of the ring part 4 on the sealing ring 3.

[0032] A connecting flange 201 is fixedly connected to the outer wall of the valve body 2. The connecting flange 201 is fixedly connected to the valve body 2 by welding. This welding method can ensure the connection strength between the connecting flange 201 and the valve body 2. The connecting flange 201 is fixed to the cylinder body 1 by bolts, and the first ring plate 5 is fixedly connected to the lower surface of the connecting flange 201. During installation, the sealing ring 3 is placed into the mounting groove 101, and then the lower end of the valve body 2 is inserted into the mounting groove 101. At this time, the lower end of the valve body 2 passes through the inner ring of the sealing ring 3. Simultaneously, the first ring plate 5 is directly above the annular part 4. As the valve body 2 is inserted downward (by tightening the bolts to move the connecting flange 201 toward the end of the mounting groove 101), the extrusion wall 501 on the first ring plate 5 contacts the bent end of the spring piece 402, causing the extrusion wall 501 to press the bent end of the spring piece 402. This causes the bent end of the spring piece 402 to deform downward and exert pressure on the pressure plate 6, and also causes the bent end of the spring piece 402 to move toward the valve body 2. This allows the sealing ring 3 to fit tightly against the side wall of the valve body 2, thereby improving the sealing performance and preventing air leakage at the connection between the valve body 2 and the cylinder body 1.

[0033] Example 3 like Figures 2-7 as well as Figure 8 As shown, based on the above embodiments, in this embodiment, in order to further effectively seal the connection between the valve body 2 and the cylinder body 1, specifically: An annular groove 102 is provided in the mounting groove 101, with one side of the groove 102 close to the side wall of the valve body 2. A sealing ring lip 302 is fixedly connected to the inner side of the sealing ring 3. When the sealing ring 3 is installed in the mounting groove 101, the sealing ring lip 302 is located in the groove 102.

[0034] A second annular plate 7 is fixedly connected to the side wall of the valve body 2 to press the sealing ring lip 302 into the recess 102. A protrusion 701 is provided at the bottom of the second annular plate 7. When the valve body 2 is installed in the mounting groove 101, the protrusion 701 abuts against the sealing ring lip 302. At this time, the protrusion 701 presses the sealing ring lip 302 into the recess 102, further enhancing the sealing effect. Through this design, an additional sealing barrier is added on top of the original seal, greatly improving the sealing performance at the connection between the valve body 2 and the cylinder body 1, effectively preventing gas leakage, and ensuring the engine can operate efficiently and stably.

[0035] The first ring plate 5 and the second ring plate 7 are fixedly installed inside the valve body 2 by bolts. This installation method ensures the stability and reliability of the structure. The bolt fixing provides sufficient connection strength so that the first ring plate 5 and the second ring plate 7 will not loosen during engine operation, thereby ensuring that the sealing performance of the entire valve body structure remains in good condition at all times.

[0036] In summary, the valve body structure of the engine cylinder head described in these three embodiments achieves efficient sealing at the connection between the valve body 2 and the cylinder body 1 through the synergistic effect of multiple components and continuous optimization design. From the initial sealing design to further optimization of the annular component, and then to the sealing measures of adding a sealing ring lip and a second ring plate, each step is progressively improved, effectively enhancing the engine's sealing performance, reducing gas leakage, and ensuring the normal operation of the engine and improving its working efficiency.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A valve seat structure for an engine cylinder head, characterized in that, include: The cylinder body (1) is provided with a mounting groove (101). Valve body (2), the valve body (2) is mounted on the cylinder body (1), and the lower end of the valve body (2) is detachably inserted into the mounting groove (101); A sealing ring (3) is provided in the mounting groove (101). The outer wall of the sealing ring (3) is pressed against the inner wall of the mounting groove (101), and the inner wall of the sealing ring (3) is pressed against the outer wall of the valve body (2). It is used to seal the connection between the valve body (2) and the cylinder body (1). The sealing ring (3) has a groove (301) with a "V" shaped cross-section. An annular part (4) is provided in the groove (301). The lower side of the annular part (4) is attached to the inner wall of the groove (301). A first ring plate (5) is fixed on the side wall of the valve body (2). When the valve body (2) is installed in the mounting groove (101), the first ring plate (5) presses down on the ring part (4).

2. The valve seat structure of an engine cylinder head according to claim 1, characterized in that, The annular component (4) includes a ring (401), on which a plurality of U-shaped spring pieces (402) are distributed circumferentially, with gaps between adjacent spring pieces (402); The spring (402) has a curved portion near one end of the valve body (2), which bends downward and abuts against the upper surface of the sealing ring (3). The side wall of the first ring plate (5) is provided with a compression wall (501) for compressing the curved end.

3. The valve seat structure of an engine cylinder head according to claim 2, characterized in that, A pressure plate (6) is provided between the sealing ring (3) and the bent end of the spring piece (402).

4. The valve seat structure of an engine cylinder head according to claim 2, characterized in that, The ring (401) and the spring (402) are manufactured as a single piece.

5. The valve seat structure of an engine cylinder head according to claim 4, characterized in that, The ring (401) and the spring piece (402) are fixed in the groove (301) of the sealing ring (3).

6. The valve seat structure of an engine cylinder head according to claim 1, characterized in that, A connecting flange (201) is fixedly connected to the outer wall of the valve body (2), and the first ring plate (5) is fixedly connected to the lower surface of the connecting flange (201).

7. The valve seat structure of an engine cylinder head according to claim 1, characterized in that, The mounting groove (101) is provided with a ring-shaped recess (102), one side of which is close to the side wall of the valve body (2), and a sealing ring lip (302) is fixedly connected to the inner side of the sealing ring (3). When the sealing ring (3) is installed into the mounting groove (101), the sealing ring lip (302) is in the recess (102).

8. The valve seat structure of an engine cylinder head according to claim 7, characterized in that, A second ring plate (7) for pressing the sealing ring lip (302) into the groove (102) is fixedly connected to the side wall of the valve body (2). The bottom of the second ring plate (7) is provided with a protrusion (701). When the valve body (2) is installed in the mounting groove (101), the protrusion (701) abuts against the sealing ring lip (302).

9. The valve seat structure of an engine cylinder head according to claim 8, characterized in that, The first ring plate (5) and the second ring plate (7) are fixedly installed inside the valve body (2) by bolts.

Images