Diesel engine valve chamber cover with leak-proof function

Abstract

The utility model discloses a diesel engine valve chamber cover with leak -proof function, including setting in the cover of gas chamber top, the cover is equipped with the connecting hole, the cover is evenly equipped with check valve, the gas chamber top is equipped with the connecting plate, the cover bottom is fixed with the lining, the gradient sealing structure is equipped between the lining and the connecting plate, the gradient sealing structure includes setting compound dynamic sealing assembly, the lining is equipped with multiple groups quick -release components between the connecting plate, quick -release component includes with the fixed barb of connecting plate, the inboard of barb is equipped with with the fixed support arm of lining, the support arm terminal elasticity is connected with the buckle of barb engagement. The utility model discloses through setting quick -release component, compared with prior art, effectively reduce the displacement under diesel engine high -speed vibration, improve the anti -loose ability, prevent the gap between the contact surface, reduce the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine technology, and in particular to a diesel engine valve chamber cover with anti-leakage function. Background Technology

[0002] The valve cover of a diesel engine is a crucial sealing component covering the valve mechanism, used to prevent oil leakage and block external contaminants from entering. In existing technology, the conventional sealing method involves using a sealing ring to seal the valve cover, followed by bolts or other fasteners to secure it to the valve chamber. However, in practical applications, the simple mounting hole design of traditional valve covers makes it easy for bolts and similar fasteners to loosen due to vibration, leading to gaps between the valve cover and the valve chamber. This further exacerbates the risk of leakage and is detrimental to practical applications. Therefore, we propose a diesel engine valve cover with leak-proof functionality. Utility Model Content

[0003] To solve the above problems, this utility model provides a diesel engine valve chamber cover with a leak-proof function.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] Design a leak-proof diesel engine valve chamber cover, including a cover plate disposed above the valve chamber, the cover plate having connection holes, one-way valves evenly distributed on the cover plate, a connecting plate at the top of the valve chamber, a liner fixed at the bottom of the cover plate, a gradient sealing structure between the liner and the connecting plate, the gradient sealing structure including a composite dynamic sealing component, multiple quick-release components between the liner and the connecting plate, the quick-release component including a barb fixed to the connecting plate, a support arm fixed to the liner on the inner side of the barb, and a buckle elastically connected to the end of the support arm that engages with the barb.

[0006] In the above scheme, the top of the connecting plate is provided with a stepped block, and the composite dynamic sealing component is installed on the upper surface of the stepped block.

[0007] In the above scheme, the bottom of the stepped block is provided with an elastic compensation layer, which is an elastic silicone layer.

[0008] In the above scheme, the composite dynamic sealing component includes a shape memory alloy skeleton, a rubber layer is sleeved on the outside of the shape memory alloy skeleton, a sealing cover is provided on the inside of the rubber layer, and a spring is embedded in the sealing cover.

[0009] In the above scheme, a dustproof baffle is provided at the top of the rubber layer, located above the spring.

[0010] In the above scheme, the inner wall of the cover plate is densely covered with reinforcing ribs.

[0011] In the above scheme, the buckle is connected to the support arm through a rotating shaft. The two ends of the rotating shaft are fixed with limiting plates located on the outside of the support arm. A rotating arm is fixed on the limiting plate. A torsion spring is sleeved on the rotating shaft, with its two ends respectively connected to the support arm and the buckle.

[0012] In the above scheme, the top of the buckle is locked to the barb by a screw.

[0013] The advantages and beneficial effects of this utility model are as follows: By setting up a quick-release assembly, when the rotating arm drives the shaft to rotate, the buckle is placed into the barb. At this time, releasing the rotating arm releases the torque of the torsion spring, causing the buckle to automatically engage with the end face of the barb, achieving a quick installation effect and simplifying the installation steps. The use of multiple quick-release assemblies improves the tightness of the connection. Combined with screws, the end interface of the barb and the buckle is locked. Compared with the prior art, it effectively reduces the displacement under high-speed vibration of the diesel engine, improves the anti-loosening ability, prevents gaps between the contact surfaces, and reduces the risk of leakage. By setting up a composite dynamic sealing assembly, using a shape memory alloy skeleton, the rubber layer is pushed outward to expand when it expands at high temperature, thereby compensating for the thermal deformation gap between the sealing cover and the liner. Combined with the preload of the spring, dynamic sealing pressure is continuously provided between the liner and the connecting plate. Under vibration conditions, contact pressure is applied to the sealing interface, effectively reducing the probability of leakage. It achieves the effect of adaptive compensation of the sealing surface gap under the severe temperature fluctuation of the diesel engine, thus improving the sealing performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a diesel engine valve chamber cover with anti-leakage function proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a quick-release assembly for a diesel engine valve cover with anti-leakage function proposed in this utility model;

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 4 A cross-sectional view of the liner and connecting plate of a diesel engine valve chamber cover with anti-leakage function proposed in this utility model;

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B;

[0020] Figure 6 A cross-sectional view of a composite dynamic sealing assembly for a diesel engine valve chamber cover with anti-leakage function proposed in this utility model;

[0021] Figure 7 This is a schematic diagram of the internal structure of a cover plate for a diesel engine valve chamber cover with anti-leakage function proposed in this utility model.

[0022] In the diagram: 1. Air chamber; 2. Cover plate; 3. Liner plate; 4. Connecting plate; 5. Connecting hole; 6. One-way valve; 7. Quick release assembly; 71. Barb; 72. Support arm; 73. Buckle; 74. Rotating shaft; 75. Limiting plate; 76. Torsion spring; 77. Rotating arm; 78. Screw; 8. Reinforcing rib; 9. Step block; 10. Composite dynamic sealing assembly; 101. Memory alloy skeleton; 102. Rubber layer; 103. Dustproof baffle; 104. Sealing cover; 105. Spring; 105. Elastic compensation layer; 11. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0024] Please see Figure 1-7 This utility model provides a technical solution: a diesel engine valve chamber cover with anti-leakage function, including a cover plate 2 disposed above the valve chamber 1. The cover plate 2 is made of cast aluminum alloy and plated with a nickel-phosphorus alloy layer to reduce the risk of high-temperature oxidation deformation.

[0025] Furthermore, such as Figure 7 As shown, the inner wall of the cover plate 2 is densely covered with reinforcing ribs 8, which are honeycomb-shaped, with a rib height of 5 to 8 mm and a wall thickness of 1.5 to 2 mm.

[0026] The cover plate 2 has a connection hole 5, which is the same as the connection hole disclosed in the oil-proof valve cover with announcement number CN220185241U. One-way valves 6 are evenly arranged on the cover plate 2. The opening pressure of the one-way valve 2 is set to 0.03MPa. A connecting plate 4 is fixedly provided at the top of the air chamber 1. The connecting plate 4 includes a vertical part and an annular part. A liner 3 is fixed at the bottom of the cover plate 2. A gradient sealing structure is provided between the liner 3 and the connecting plate 4. The gradient sealing structure includes a composite dynamic sealing component 10.

[0027] Furthermore, a stepped block 9 is fixedly provided on the top of the connecting plate 4, and the composite dynamic sealing component 10 is installed on the upper surface of the stepped block 9. An installation groove for installing the composite dynamic sealing component 10 is provided on the upper surface of the stepped block 9.

[0028] Furthermore, the bottom of the stepped block 9 is provided with an elastic compensation layer 11, which is an elastic silicone layer. The elastic compensation layer 11 compensates for gap changes caused by thermal deformation and prevents the composite dynamic sealing assembly 10 from failing due to local overload.

[0029] Furthermore, the composite dynamic sealing assembly 10 includes a shape memory alloy skeleton 101, a rubber layer 102 is sleeved on the outside of the shape memory alloy skeleton 101, the rubber layer 102 is a nitrile rubber layer, a sealing cover 104 is provided on the inner side of the rubber layer 102, the right side of the sealing cover 104 is tightly fitted with the vertical part of the connecting plate 4, and a spring 105 is embedded in the sealing cover 104.

[0030] Furthermore, a dustproof baffle 103 is provided at the top of the rubber layer 102, located above the spring 105, and the dustproof baffle 103 is tightly fitted with the vertical part of the connecting plate 4.

[0031] Specifically, by setting up a composite dynamic sealing component 10, the shape memory alloy skeleton 101 pushes the rubber layer 102 to expand outward when it expands at high temperature, thereby compensating for the thermal deformation gap between the sealing cover 104 and the liner 3. Combined with the preload of the spring 105, it continuously provides dynamic sealing pressure between the liner 3 and the connecting plate 4. Under vibration conditions, it applies contact pressure to the sealing interface, effectively reducing the probability of leakage. This achieves the effect of adaptively compensating for the gap of the sealing surface under the severe temperature fluctuation of the diesel engine, thus improving the sealing performance.

[0032] Multiple quick-release components 7 are provided between the liner plate 3 and the connecting plate 4. The quick-release components 7 include a barb 71 fixed to the side of the connecting plate 4. The inner side of the barb 71 is provided with a support arm 72 fixed to the liner plate 3. The end of the support arm 72 is elastically connected to a buckle 73 that fits with the barb 71.

[0033] Furthermore, the buckle 73 is connected to the support arm 72 via a rotating shaft 74. The rotating shaft 74 is fixed to the buckle 73, and the two ends of the rotating shaft 74 are fixed with limiting plates 75 located on the outside of the support arm 72. A rotating arm 77 is fixed on the limiting plates 75. A torsion spring 76 is sleeved on the rotating shaft 74, with its two ends connected to the support arm 72 and the buckle 73 respectively. By controlling the rotating arm 77, the rotating shaft 74 can be rotated, thereby driving the buckle 73 to rotate.

[0034] Furthermore, the top of the buckle 73 is locked to the barb 71 by a screw 78, and the top of the buckle 73 is provided with a protruding connecting block, which is embedded in the end of the barb 71;

[0035] Specifically, by setting up quick-release components 7, when the rotating arm 77 drives the rotating shaft 74 to rotate, the buckle 73 is placed into the barb 71. At this time, the rotating arm 77 is released to release the torque of the torsion spring 76, which drives the buckle 73 to automatically engage with the end face of the barb 71, achieving a quick installation effect and simplifying the installation steps. By using multiple sets of quick-release components 7, the tightness of the connection is improved. In addition, the screws 78 are used to lock the end interface of the barb 71 and the buckle 73. Compared with the existing technology, it effectively reduces the displacement under high-speed vibration of the diesel engine, improves the anti-loosening ability, prevents gaps between the contact surfaces, and reduces the risk of leakage.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A diesel engine valve chamber cover with leak-proof function, comprising a cover plate (2) disposed above the valve chamber (1), wherein the cover plate (2) has a connecting hole (5), characterized in that, One-way valves (6) are evenly provided on the cover plate (2). A connecting plate (4) is provided at the top of the air chamber (1). A liner (3) is fixed at the bottom of the cover plate (2). A gradient sealing structure is provided between the liner (3) and the connecting plate (4). The gradient sealing structure includes a composite dynamic sealing component (10). Multiple quick-release components (7) are provided between the liner (3) and the connecting plate (4). The quick-release component (7) includes a barb (71) fixed to the connecting plate (4). A support arm (72) fixed to the liner (3) is provided on the inner side of the barb (71). A buckle (73) that fits into the barb (71) is elastically connected to the end of the support arm (72).

2. A diesel engine valve chamber cover with anti-leakage function according to claim 1, characterized in that, The connecting plate (4) has a stepped block (9) on top, and the composite dynamic sealing component (10) is installed on the upper surface of the stepped block (9).

3. A diesel engine valve chamber cover with anti-leakage function according to claim 2, characterized in that, The bottom of the stepped block (9) is provided with an elastic compensation layer (11), which is an elastic silicone layer.

4. A diesel engine valve chamber cover with anti-leakage function according to claim 2, characterized in that, The composite dynamic sealing assembly (10) includes a shape memory alloy skeleton (101), a rubber layer (102) is sleeved on the outside of the shape memory alloy skeleton (101), a sealing cover (104) is provided on the inside of the rubber layer (102), and a spring (105) is embedded in the sealing cover (104).

5. A diesel engine valve chamber cover with anti-leakage function according to claim 4, characterized in that, The top of the rubber layer (102) is provided with a dustproof baffle (103) located above the spring (105).

6. A diesel engine valve chamber cover with anti-leakage function according to claim 1, characterized in that, The inner wall of the cover plate (2) is densely covered with reinforcing ribs (8).

7. A diesel engine valve chamber cover with anti-leakage function according to claim 1, characterized in that, The buckle (73) is connected to the support arm (72) via a rotating shaft (74). The two ends of the rotating shaft (74) are fixed with limiting plates (75) located on the outside of the support arm (72). A rotating arm (77) is fixed on the limiting plate (75). A torsion spring (76) is sleeved on the rotating shaft (74) and its two ends are respectively connected to the support arm (72) and the buckle (73).

8. A diesel engine valve chamber cover with anti-leakage function according to claim 1, characterized in that, The top of the buckle (73) is locked to the barb (71) by a screw (78).

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