A sealing assembly for a marine engine air intake

Abstract

The utility model relates to a sealing assembly related field especially, a kind of sealing assembly for marine engine air intake, including intake pipe, air inlet, first flange, second flange, support tube, annular insert block, sealing sheet, annular slot, metal bellows.The utility model is provided with support tube between intake pipe and air inlet, provides a heavy seal for the connecting place of intake pipe and air inlet, and sealing sheet provides two heavy seals, while metal bellows provides axial seal for first flange and second flange, realizes the three heavy seals of intake pipe and air inlet, improves the sealing effect of intake pipe and engine air inlet, and metal bellows itself has elasticity, can absorb vibration energy, reduce the wear and tear of sealing sheet due to repeated friction, improve the service life of sealing sheet, it is favorable to guarantee the sealing of intake pipe and engine connection, it is favorable to gas through intake pipe stably into engine.

Description

Technical Field

[0001] This utility model relates to the field of sealing components, and in particular to a sealing component for the air intake of a marine engine. Background Technology

[0002] Marine engines are the core devices that provide power for ship navigation. They mainly convert chemical energy into mechanical energy by burning fuel, driving propellers or thrusters to move the ship. Common types include marine diesel engines and gas turbines. When marine engines are working, they need to continuously draw in fresh air from the outside to ensure complete combustion of fuel. In order to ensure a stable supply of outside air to the engine, the air intake of a marine engine is usually connected to an intake pipe. In order to improve the sealing of the connection between the intake pipe and the air intake, sealing components are usually installed at the intake pipe and the air intake to ensure that air enters the air intake steadily through the intake pipe.

[0003] Existing sealing components are typically gaskets placed between the intake pipe and the connecting flange of the intake port. However, this single-layer sealing method has poor sealing effect, especially since the gaskets are prone to aging and wear after long-term use, which reduces the sealing performance between the intake pipe and the intake port and makes them less reliable. When the ship engine is running, it is prone to severe vibration, and ordinary gaskets are prone to fretting wear or fatigue cracking, which reduces the service life of the gaskets and easily reduces the sealing performance of the connection between the intake pipe and the engine. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a sealing assembly for the air intake of a marine engine to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sealing assembly for the air intake of a marine engine, comprising an air intake pipe, an air intake port, a first flange, a second flange, a support pipe, bolts, a circular convex plate, an annular insert, a sealing sheet, an annular slot, an annular groove, and a metal bellows; the air intake pipe is connected to the air intake port; a first flange is installed on the air intake pipe; a second flange is provided on the air intake port, and the first flange and the second flange are fitted together; both ends of the support pipe are respectively movably inserted into the inner sides of the air intake pipe and the air intake port; The circular convex plates are arranged concentrically on the support pipe. The circular convex plates extend movably between the left and right opposite surfaces of the first flange and the second flange, and the two ends of the circular convex plates extend outward along their outer circumference to form annular inserts. The first flange, the second flange, and the circular convex plate are fixed together by bolts. The support tube, the circular convex plate, and the outer surface of the circular convex plate are all covered with sealing sheets, and the outer surface of the sealing sheets is in contact with the inner side of the air inlet pipe, the air inlet, the first flange, and the second flange. Each end of the annular insert has an annular groove, and a metal bellows is installed in the annular groove. The two metal bellows abut against the inner wall of the annular slot opened on the inner end face of the first flange and the second flange, respectively. The metal bellows are made of stainless steel.

[0006] Preferably, both ends of the inner side of the support tube expand outward to form expansion openings.

[0007] Preferably, the sealing sheet is made of silicone.

[0008] Preferably, the inner ring of the annular insert is a gradually tapering slope from the outside to the inside, and the inner side of the annular slot is a corresponding slope.

[0009] Preferably, a rubber gasket is attached to the inner wall of the annular slot, and the rubber gasket is in contact with the metal bellows.

[0010] Preferably, the vertical cross-section of the metal corrugated pipe is U-shaped.

[0011] Preferably, the sealing sheet is provided with two outwardly protruding hollow sealing rings, and a sealing groove is opened in both the air inlet pipe and the air inlet, with the two sealing grooves corresponding to the two hollow sealing rings.

[0012] Preferably, the support tube has two annular shrinkage grooves, which are located inside the two hollow sealing rings respectively.

[0013] The beneficial effects of this utility model are: This invention provides a first-level seal at the connection between the intake pipe and the intake port by placing a support tube between them, while the sealing plate provides a second-level seal. Simultaneously, the metal bellows provides an axial seal for the first and second flanges, achieving a triple seal between the intake pipe and the intake port. This improves the sealing effect between the intake pipe and the engine intake port. Furthermore, the metal bellows itself is elastic, absorbing vibration energy and reducing wear on the sealing plate due to repeated friction, thus extending its service life. This helps ensure the sealing performance of the connection between the intake pipe and the engine, and facilitates the stable entry of gas into the engine through the intake pipe. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the sealing component connection structure of this utility model; Figure 2 This is a side view sectional structural diagram of the sealing component of this utility model; Figure 3 This is the utility model Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 This is an exploded structural diagram of the sealing component of this utility model; Figure 5This is a cross-sectional structural diagram of Embodiment 2 of this utility model.

[0015] Among them: intake pipe-1, intake port-2, first flange-3, second flange-4, support pipe-5, bolt-6, circular convex plate-7, annular insert-8, sealing plate-9, hollow sealing ring-10, sealing groove-11, contraction groove-12, annular slot-13, annular groove-14, metal bellows-15, rubber gasket-16, expansion port-17. Detailed Implementation

[0016] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0017] Example 1 like Figures 1 to 4 As shown, this utility model provides a sealing assembly for the air intake of a marine engine, including an air intake pipe 1, an air inlet 2, a first flange 3, a second flange 4, a support pipe 5, bolts 6, a circular convex plate 7, an annular insert 8, a sealing plate 9, an annular slot 13, an annular groove 14, and a metal bellows 15; the air intake pipe 1 is connected to the air inlet 2; the first flange 3 is installed on the air intake pipe 1 with the same center. A second flange 4 is installed on the air inlet 2 at the same center, and the first flange 3 and the second flange 4 are fitted together; The left and right ends of the support tube 5 are respectively movably inserted into the inner side of the air inlet tube 1 and the air inlet 2; The circular convex plate 7 is set on the support pipe 5 with the same center. The circular convex plate 7 and the support pipe 5 are integrally cast. The circular convex plate 7 extends into the left and right opposite surfaces of the first flange 3 and the second flange 4. The two ends of the circular convex plate 7 extend outward along its outer circumference to form annular inserts 8. The first flange 3, the second flange 4, and the circular convex plate 7 are locked and fixed by two or more bolts 6; The support pipe 5, the circular convex plate 7, and the outer surface of the circular convex plate 7 are all covered with sealing sheets 9. The support pipe 5, the circular convex plate 7, and the sealing sheets 9 on the circular convex plate 7 are integrally formed. The outer surface of the sealing sheet 9 is in contact with the inner end face of the air inlet pipe 1, the air inlet 2, the first flange 3, and the second flange 4. An annular groove 14 is provided at each of the left and right ends of the annular insert 8. A metal bellows 15 is installed in the annular groove 14. The vertical cross section of the metal bellows 15 is U-shaped. The two metal bellows 15 respectively abut against the inner wall of the annular slot 13 opened on the inner end face of the first flange 3 and the second flange 4. The metal bellows 15 is made of stainless steel. In this embodiment, in order to allow external air to stably enter the support pipe 5 from the air inlet pipe 1 and to facilitate air passage through the support pipe 5 into the air inlet 2, expansion ports 17 are formed at both ends of the inner side of the support pipe 5. In this embodiment, the sealing sheet 9 is made of silicone. In this embodiment, an annular rubber gasket 16 is attached to the inner wall of the annular slot 13. The rubber gasket 16 is attached to the metal bellows 15, and the rubber gasket 16 further improves the sealing performance of the metal bellows 15 connected to the annular slot 13. Among them, the inner ring of the annular insert 8 is a gradually tapering slope from the outside to the inside, and the inner side of the annular slot 13 is a corresponding slope. This makes it easier for the sealing plate 9 at the bottom of the annular insert 8 to fit more tightly into the inner side of the annular slot 13, thereby improving the sealing performance of the first flange 3 and the second flange 4, and indirectly improving the sealing performance of the connection between the air intake pipe 1 and the air intake port 2. Specifically, air inlet 2 is installed on the ship's engine, while the end of air inlet pipe 1 is connected to the entrance of outside air, such as the air intake grille on the ship's deck, according to the overall layout of the ship and the design of the air intake system. Outside air enters the engine through air inlet pipe 1 and air inlet 2 for use. When air flows between the intake pipe 1 and the intake port 2, the support pipe 5 blocks the gap at the connection between the intake pipe 1 and the intake port 2, providing a first seal at the connection. The support pipe 5, the circular convex plate 7, and the sealing plate 9 outside the circular convex plate 7 improve the sealing performance between the corresponding two components, thereby improving the sealing performance of the support pipe 5, the circular convex plate 7, and the circular convex plate 7 respectively connecting the intake pipe 1, the intake port 2, the first flange 3, and the second flange 4, providing a second seal for the connection between the intake pipe 1 and the intake port. At the same time, the metal bellows 15 provides an axial seal for the first flange 3 and the second flange 4, achieving a triple seal between the intake pipe 1 and the intake port 2, thereby improving the sealing effect between the intake pipe 1 and the engine intake port 2.

[0018] Example 2 like Figure 5 As shown, in this embodiment, the sealing sheet 9 is provided with two outwardly protruding hollow sealing rings 10. An annular sealing groove 11 is provided in both the air inlet pipe 1 and the air inlet 2. The two sealing grooves 11 correspond to the two hollow sealing rings 10. The support pipe 5 is provided with two annular contraction grooves 12. The two contraction grooves 12 are located inside the two hollow sealing rings 10 respectively. When the support pipe 5 drives the sealing sheet 9 to be inserted into the air inlet pipe 1 and the air inlet 2, the hollow sealing rings 10 contract into the contraction grooves 12, reducing the friction between the hollow sealing rings 10 and the inner rings of the air inlet pipe 1 and the air inlet 2. The hollow sealing rings 10, in conjunction with the annular sealing grooves 11, further improve the sealing performance of the support pipe 5 connecting the air inlet pipe 1 and the air inlet 2, and improve the stability of air delivery.

[0019] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 sealing assembly for the air intake of a marine engine, comprising an air intake pipe, an air inlet connected to the air intake pipe, a first flange mounted on the air intake pipe, and a second flange provided on the air inlet, wherein the first flange and the second flange are fitted together. Its features are, Also includes: The support tube has its two ends movably inserted into the air intake pipe and the inside of the air intake port, respectively. A circular convex plate is concentrically mounted on the support pipe. The circular convex plate extends movably between the opposing surfaces of the first flange and the second flange, and both ends of the circular convex plate extend outward along its outer circumference to form annular inserts. The first flange, the second flange, and the circular convex plate are fixed together by bolts. The support tube, the circular convex plate, and the outer surface of the circular convex plate are all covered with sealing sheets, and the outer surface of the sealing sheets is in contact with the inner side of the air inlet pipe, the air inlet, the first flange, and the second flange. Each end of the annular insert has an annular groove, and a metal bellows is installed in the annular groove. The two metal bellows abut against the inner wall of the annular slots opened on the first flange and the second flange, respectively.

2. The sealing assembly for marine engine air intake according to claim 1, characterized in that: Both ends of the inner side of the support tube expand outward to form expansion openings.

3. The sealing assembly for marine engine air intake according to claim 1, characterized in that: The sealing sheet is made of silicone.

4. The sealing assembly for marine engine air intake according to claim 1, characterized in that: The inner ring of the annular insert is a gradually tapering slope from the outside to the inside, and the inner side of the annular slot is a corresponding slope.

5. A sealing assembly for marine engine air intake according to claim 1, characterized in that: A rubber gasket is attached to the inner wall of the annular slot, and the rubber gasket is in contact with the metal bellows.

6. The sealing assembly for marine engine air intake according to claim 1, characterized in that: The vertical cross-section of the metal bellows is U-shaped.

7. A sealing assembly for marine engine air intake according to claim 1, characterized in that: The sealing sheet is provided with two outwardly protruding hollow sealing rings, and a sealing groove is opened in the air inlet pipe and the air inlet, with the two sealing grooves corresponding to the two hollow sealing rings.

8. A sealing assembly for marine engine air intake according to claim 7, characterized in that: The support tube has two annular shrinkage grooves, which are located inside the two hollow sealing rings.

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