Non-asbestos gasket capable of improving sealing performance for engine

Abstract

The non-asbestos gasket for the engine can improve the sealing performance and comprises an upper gasket body, the upper gasket body comprises a protective layer, a sealing layer is arranged in the protective layer, an elastic layer is arranged in the sealing layer, and a lower gasket body is arranged at the bottom of the upper gasket body. According to the asbestos-free gasket capable of improving the sealing performance for the engine, the positioning groove is matched with the positioning block, so that the upper gasket body and the lower gasket body can be conveniently positioned during installation, and the sealing performance is improved while errors are prevented from occurring during installation of the gasket. The contact area between the upper gasket body and the lower gasket body is increased through the multiple positioning blocks and the multiple positioning grooves, the sealing effect is improved, the elastic layer is extruded after the upper gasket body and the lower gasket body are extruded through the elastic layer, the upper gasket body can be better attached to the surface of the exhaust manifold, and the sealing effect is improved. And meanwhile, the sealing effect can be improved by better fitting with the surface during thermal expansion and cold contraction.

Description

Technical Field

[0001] This utility model relates to the field of asbestos-free gaskets, and more particularly to asbestos-free gaskets for engines that can improve sealing performance. Background Technology

[0002] Asbestos-free gaskets are sealing products of various shapes made from asbestos-free sealing materials such as aramid fibers, high-temperature resistant synthetic mineral fibers, and oil-resistant rubber, using rolling or various tools for stamping and shearing, according to the specific working conditions. Asbestos-free gaskets are generally divided into asbestos-free rubber sheet gaskets and asbestos-free sheet gaskets based on their formula, process performance, and application. They are all asbestos-free sealing gasket series made from organic fibers such as aramid and plant fibers, nitrile rubber, and minerals through calendering or sheet forming processes.

[0003] Nowadays, asbestos-free gaskets are used in engines to seal gaps at joints, such as between the cylinder block and cylinder head, or between the exhaust manifold and cylinder head.

[0004] However, modern asbestos-free gaskets have mounting holes inside. During installation, after the bolt passes through the mounting hole, it is limited by the compression between the exhaust manifold and the cylinder head. Usually, the diameter of the mounting hole is larger than the diameter of the bolt, which often causes misalignment of the asbestos-free gasket during installation, resulting in a decrease in sealing performance.

[0005] Therefore, it is necessary to provide asbestos-free gaskets for engines that can improve sealing performance to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides an asbestos-free gasket for engines that improves sealing performance, solving the problem that the diameter of the mounting hole is often larger than the diameter of the bolt, causing misalignment of the asbestos-free gasket during installation.

[0007] To solve the above-mentioned technical problems, the present invention provides an asbestos-free gasket for engines that improves sealing performance, comprising:

[0008] An upper gasket, the upper gasket including a protective layer, a sealing layer disposed inside the protective layer, and an elastic layer disposed inside the sealing layer;

[0009] A lower gasket, wherein the lower gasket is disposed at the bottom of the upper gasket;

[0010] Multiple positioning grooves are provided inside the lower pad, and positioning blocks are slidably connected inside each of the multiple positioning grooves.

[0011] Preferably, the tops of the plurality of positioning blocks are all fixedly connected to the bottom of the upper pad.

[0012] Preferably, the protective layer is made of high-temperature resistant metal foil, the sealing layer is an asbestos-free gasket, and the elastic layer is made of rubber.

[0013] Preferably, the lower pad has a slot inside, and a retaining ring is slidably connected inside the slot.

[0014] Preferably, the upper gasket has four fixing grooves inside, and each of the four fixing grooves is slidably connected to a fixing block.

[0015] Preferably, the four fixing slots are respectively formed at the top and bottom of the upper gasket.

[0016] Preferably, the four fixing blocks are internally fixedly connected to two fixing sleeves, while the surface of one fixing sleeve is fixedly connected to two fixing blocks.

[0017] Compared with related technologies, the asbestos-free gasket for engines provided by this utility model, which improves sealing performance, has the following beneficial effects:

[0018] This invention provides an asbestos-free gasket for engines that improves sealing performance. The gasket uses positioning grooves and blocks to facilitate positioning of the upper and lower gaskets during installation, preventing installation errors. Multiple positioning blocks and grooves increase the contact area between the upper and lower gaskets, enhancing the sealing effect. Furthermore, the elastic layer allows the upper and lower gaskets to compress each other, improving the fit between the upper and lower gaskets and the exhaust manifold surface. This also ensures better sealing during thermal expansion and contraction. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the first embodiment of the asbestos-free gasket for engine that improves sealing performance provided by this utility model;

[0020] Figure 2 for Figure 1 The diagram shows the structure of the positioning groove.

[0021] Figure 3 for Figure 2 The diagram shows the structure of the positioning block.

[0022] Figure 4 for Figure 1 The diagram shows the structure of the upper gasket;

[0023] Figure 5 A schematic diagram of the structure of a second embodiment of the asbestos-free gasket for an engine that improves sealing performance according to this utility model;

[0024] Figure 6 for Figure 5 The diagram shows the structure of the fixing sleeve.

[0025] The numbers in the diagram are: 1. Upper gasket, 2. Lower gasket, 3. Positioning groove, 4. Positioning block, 5. Protective layer, 6. Sealing layer, 7. Elastic layer, 8. Slot, 9. Snap ring, 10. Fixing groove, 11. Fixing block, 12. Fixing sleeve. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] First Embodiment

[0028] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A schematic diagram of the structure of the first embodiment of the asbestos-free gasket for engine that improves sealing performance provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the positioning groove. Figure 3 for Figure 2 The diagram shows the structure of the positioning block. Figure 4 for Figure 1 The diagram shows the structure of the upper gasket. An asbestos-free gasket for engines, which improves sealing performance, includes:

[0029] Upper gasket 1, the upper gasket 1 includes a protective layer 5, a sealing layer 6 is disposed inside the protective layer 5, and an elastic layer 7 is disposed inside the sealing layer 6;

[0030] Lower gasket 2, wherein the lower gasket 2 is disposed at the bottom of the upper gasket 1;

[0031] Multiple positioning grooves 3 are provided inside the lower pad 2, and positioning blocks 4 are slidably connected inside the multiple positioning grooves 3.

[0032] The lower gasket 2 is made of metal. One side of the lower gasket 2 is fixedly installed on one side of the cylinder head. When the upper gasket 1 is installed, multiple positioning blocks 4 and multiple positioning grooves 3 are used to position the upper gasket 1 and increase the contact area, thereby increasing the sealing effect.

[0033] The tops of the multiple positioning blocks 4 are all fixedly connected to the bottom of the upper gasket 1.

[0034] The protective layer 5 is made of high-temperature resistant metal foil, the sealing layer 6 is an asbestos-free gasket, and the elastic layer 7 is made of rubber.

[0035] The protective layer 5 is used to protect the sealing layer 6 and the elastic layer 7. The elastic layer 7 is used to compress the upper gasket 1 and the lower gasket 2 after compression, so that the upper gasket 1 can better fit with the surface of the exhaust manifold. At the same time, it can better fit with its surface during thermal expansion and contraction to increase the sealing effect.

[0036] The lower pad 2 has a slot 8 inside, and a retaining ring 9 is slidably connected inside the slot 8.

[0037] The top of the retaining ring 9 is fixedly connected to the bottom of the upper gasket 1. After the upper gasket 1 and the lower gasket 2 are combined, the retaining ring 9 moves to a suitable position inside the retaining groove 8, thereby increasing the contact area between the upper gasket 1 and the lower gasket 2 and thus increasing the fixing effect.

[0038] The working principle of the asbestos-free gasket for engines that improves sealing performance provided by this utility model is as follows:

[0039] In use, after fixing the lower gasket 2 to a suitable position on the surface of the cylinder head, when installing the exhaust manifold, after aligning the multiple positioning blocks 4 on one side of the upper gasket 1 with the multiple positioning grooves 3 respectively, when the exhaust manifold moves to one side, it will drive the multiple positioning blocks 4 of the upper gasket 1 to be inserted into the multiple positioning grooves 3 respectively, and then move to a suitable position to one side.

[0040] When the exhaust manifold squeezes the upper gasket 1, the elastic layer 7 is deformed by the squeeze, so that the surface of the upper gasket 1 can better contact the surface of the exhaust manifold.

[0041] Compared with related technologies, the asbestos-free gasket for engines provided by this utility model, which improves sealing performance, has the following beneficial effects:

[0042] This utility model provides an asbestos-free gasket for engines that improves sealing performance. The positioning groove 3, in conjunction with the positioning block 4, facilitates the positioning of the upper gasket 1 and lower gasket 2 during installation, preventing errors during installation. The multiple positioning blocks 4 and multiple positioning grooves 3 increase the contact area between the upper gasket 1 and lower gasket 2, enhancing the sealing effect. Furthermore, the elastic layer 7 allows the upper gasket 1 to better conform to the surface of the exhaust manifold after compression by the upper and lower gaskets 1 and 2. This also improves the sealing effect during thermal expansion and contraction.

[0043] Second Embodiment

[0044] Please refer to the following: Figure 5 and Figure 6Based on the asbestos-free gasket for engines with improved sealing performance provided in the first embodiment of this application, the second embodiment of this application proposes another asbestos-free gasket for engines with improved sealing performance. The second embodiment is merely a preferred embodiment of the first embodiment, and implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0045] Specifically, the difference in the engine non-asbestos gasket with improved sealing performance provided in the second embodiment of this application is that the engine non-asbestos gasket with improved sealing performance has four fixing grooves 10 inside the upper gasket 1, and fixing blocks 11 are slidably connected inside the four fixing grooves 10.

[0046] The four fixing slots 10 are respectively opened at the top and bottom of the upper gasket 1.

[0047] The four fixing blocks 11 are internally fixedly connected to two fixing sleeves 12, while the surface of one fixing sleeve 12 is fixedly connected to two fixing blocks 11.

[0048] After the two fixing blocks 11 are respectively inserted into the two fixing slots 10, the fixing sleeve 12 and the upper gasket 1 are limited.

[0049] The fixing sleeve 12 is a threaded sleeve that is compatible with the bolt, and is used to limit the upper washer 1 after the bolt is installed inside the fixing sleeve 12.

[0050] The working principle of the asbestos-free gasket for engines that improves sealing performance provided by this utility model is as follows:

[0051] In use, the two fixing blocks 11 are respectively inserted into the two fixing slots 10.

[0052] After aligning the bolt with the fixing sleeve 12, when the bolt is rotated to one side, the bolt moves to one side inside the fixing sleeve 12, thereby limiting the distance between the bolt and the upper washer 1. When the upper washer 1 is moved to one side for installation, the fixing sleeve 12 will be inserted into the two mounting holes inside the lower washer 2.

[0053] Compared with related technologies, the asbestos-free gasket for engines provided by this utility model, which improves sealing performance, has the following beneficial effects:

[0054] This utility model provides an asbestos-free gasket for engines that can improve sealing performance. The upper gasket 1 is limited by the fixing sleeve 12, thereby facilitating the installation of the upper gasket 1.

[0055] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An asbestos-free gasket for engines that improves sealing performance, characterized in that: include: An upper gasket, the upper gasket including a protective layer, a sealing layer disposed inside the protective layer, and an elastic layer disposed inside the sealing layer; A lower gasket, wherein the lower gasket is disposed at the bottom of the upper gasket; Multiple positioning grooves are provided inside the lower pad, and positioning blocks are slidably connected inside each of the multiple positioning grooves.

2. The engine-grade asbestos-free gasket with improved sealing performance according to claim 1, characterized in that, The tops of the multiple positioning blocks are all fixedly connected to the bottom of the upper pad.

3. The asbestos-free gasket for engines with improved sealing performance according to claim 1, characterized in that, The protective layer is made of high-temperature resistant metal foil, the sealing layer is an asbestos-free gasket, and the elastic layer is made of rubber.

4. The asbestos-free gasket for engines with improved sealing performance according to claim 1, characterized in that, The lower pad has a slot inside, and a retaining ring is slidably connected inside the slot.

5. The asbestos-free gasket for engines with improved sealing performance according to claim 1, characterized in that, The upper gasket has four fixing grooves inside, and each of the four fixing grooves is slidably connected to a fixing block.

6. The asbestos-free gasket for engines with improved sealing performance according to claim 5, characterized in that, The four fixing slots are respectively formed at the top and bottom of the upper gasket.

7. The engine-grade asbestos-free gasket with improved sealing performance according to claim 5, characterized in that, The four fixing blocks are internally fixedly connected to two fixing sleeves, while the surface of one fixing sleeve is fixedly connected to two fixing blocks.

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