High-temperature-resistant mechanical sealing element

Abstract

The utility model belongs to the technical field of mechanical sealing elements, and particularly relates to a high-temperature-resistant mechanical sealing element which comprises a shaft sleeve, a rotating shaft is rotationally connected to the inner side of the shaft sleeve, a mounting groove is formed in the side, close to the rotating shaft, of the inner side of the shaft sleeve, and a plurality of sealing gaskets are assembled in the mounting groove and attached to the rotating shaft. At least one air guide block is arranged on the outer side of the rotating shaft, an air guide groove is formed in the inner side of each air guide block, an air filling flow channel is formed in the end, close to the air guide blocks, of the shaft sleeve, an air inlet is formed in the end, close to the air guide blocks, of the air filling flow channel, and an air outlet is formed in the end, away from the air guide blocks, of the air filling flow channel. And a plurality of heat conduction strips are fixed to the positions, located on the outer side of the sealing gasket, of the inner side of the mounting groove. The heat dissipation device can dissipate heat of the sealing gasket in the mechanical sealing piece, prevents the sealing gasket from aging in advance due to overheating, and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, and in particular relates to a high-temperature resistant mechanical seal. Background Art

[0002] In the existing technology, mechanical seals are widely used in various high-temperature, high-pressure, high-speed equipment, such as key equipment in the petrochemical, electric power, steel and other industries. In these equipment, gaskets are an important part of mechanical seals, and their performance directly affects the operating efficiency and stability of the equipment. However, in actual use, due to the long-term influence of high temperature, high pressure and other factors on the gaskets, overheating, aging, wear and other problems often occur, resulting in reduced sealing performance and even equipment failure.

[0003] For example, in the petrochemical industry, many equipment need to operate for a long time in a high temperature environment, such as the catalytic cracking unit and hydrogenation unit in the refinery. The mechanical seals in these equipment are subjected to extremely high temperatures and pressures. The overheating problem of the gasket is particularly prominent. Long-term high-temperature operation will cause the performance of the gasket material to deteriorate, accelerate aging, and even cause seal failure, which will seriously affect the normal operation and safe production of the equipment.

[0004] In order to solve the above problems, the prior art generally adopts methods such as adding cooling devices and selecting high temperature resistant materials to improve the working environment of the sealing gasket. However, these methods still have some problems in practical applications. First, adding cooling devices will increase the complexity and cost of the equipment. Second, the research and development and application of high temperature resistant materials are limited by material performance and cost, and it is difficult to meet all the requirements in high temperature environments.

[0005] Therefore, it is necessary to provide a sealing gasket that can dissipate heat inside a mechanical seal. Utility Model Content

[0006] The utility model aims to provide a high temperature resistant mechanical seal, which can dissipate heat for a sealing gasket inside the mechanical seal to avoid premature aging of the sealing gasket due to overheating, and has a simple structure and low cost.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A high temperature resistant mechanical seal comprises a shaft sleeve, the inner side of which is rotatably connected to a rotating shaft;

[0009] A mounting groove is provided on the inner side of the sleeve and on a side close to the rotating shaft, a plurality of sealing gaskets are installed inside the mounting groove, and the sealing gaskets are fitted with the rotating shaft;

[0010] At least one air guide block is arranged on the outer side of the rotating shaft, an air guide groove is arranged on the inner side of the air guide block, an air filling channel is arranged on the end of the sleeve close to the air guide block, an air inlet is arranged on the end of the air filling channel close to the air guide block, and an air outlet is arranged on the end of the air filling channel away from the air guide block.

[0011] The air filling channel is arranged in an arc shape, and the air filling channel is arranged outside the installation groove.

[0012] A plurality of heat-conducting strips are fixed on the inner side of the mounting groove and on the outer side of the sealing gasket, and the heat-conducting strips are connected to the sealing gasket. The plurality of heat-conducting strips all pass through the shaft sleeve and extend to the air-injection flow channel.

[0013] A second inclined surface is provided on the inner side of the air filling channel and at a position corresponding to the air inlet.

[0014] A first inclined surface is provided on the inner side of the air filling channel and at the position of the air outlet.

[0015] The sealing gasket and the rotating shaft are fitted together by lubricating oil.

[0016] The technical effects achieved by the utility model are:

[0017] The utility model can dissipate heat for the sealing gasket inside the mechanical seal to avoid overheating of the sealing gasket and premature aging, which can not only improve the operating efficiency of the equipment, but also extend the service life of the equipment, thereby saving maintenance and replacement costs, and has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure between the shaft sleeve, the rotating shaft and the air injection flow channel in the utility model;

[0020] Figure 3 This utility model Figure 2 The enlarged view of point A in the middle;

[0021] Figure 4 It is a schematic diagram of the structure between the shaft sleeve and the air inlet in the utility model;

[0022] Figure 5 It is a schematic diagram of the structure between the heat conducting strip, the first inclined surface and the second inclined surface in the utility model;

[0023] Figure 6 It is a wind direction diagram of the air filling flow channel in the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Bushing; 2. Rotating shaft; 3. Air guide block; 4. Air guide slot; 5. Air inlet; 6. Air filling channel; 7. Sealing gasket; 8. First inclined surface; 9. Air outlet; 10. Second inclined surface; 11. Heat transfer strip; 12. Mounting slot. DETAILED DESCRIPTION

[0026] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0027] like Figure 1-6 As shown, a high temperature resistant mechanical seal comprises a shaft sleeve 1, the inner side of which is rotatably connected to a rotating shaft 2;

[0028] An installation groove 12 is provided on the inner side of the sleeve 1 and on the side close to the rotating shaft 2. A plurality of sealing gaskets 7 are installed inside the installation groove 12. The sealing gaskets 7 are fitted with the rotating shaft 2. The sealing gaskets 7 and the rotating shaft 2 are fitted with lubricating oil. The side of the sealing gasket 7 close to the rotating shaft 2 can be coated with lubricating oil or the side of the sealing gasket 7 close to the rotating shaft 2 is provided with solid lubricating oil, so that the friction force of the rotating connection between the sealing gasket 7 and the rotating shaft 2 is reduced, thereby ensuring the rotation effect of the rotating shaft 2.

[0029] At least one air guide block 3 is arranged on the outer side of the rotating shaft 2, and an air guide groove 4 is arranged on the inner side of the air guide block 3. The air guide block 3 can use the air guide groove 4 to fill air when it rotates with the rotating shaft 2, and guide the wind to the side close to the shaft sleeve 1 through the air guide groove 4, and the air guide block 3 can also be arranged in a fan blade shape. When it rotates with the rotating shaft 2, the fan blade-shaped structure is used to blow the wind to the side close to the shaft sleeve 1. An air filling channel 6 is arranged at one end of the shaft sleeve 1 close to the air guide block 3, and an air inlet 5 is arranged at one end of the air filling channel 6 close to the air guide block 3. The wind blown by the air guide groove 4 is blown to the inner side of the air inlet 5, and enters into the air filling channel 6 through the air inlet 5. An air outlet 9 is arranged at the end of the air filling channel 6 away from the air guide block 3, and the air is discharged through the air outlet 9 after making a circle inside the air filling channel 6.

[0030] See attached Figure 5-6The air-injection channel 6 is in an arc shape and is arranged on the outside of the mounting groove 12. The sleeve 1 structure portion between the air-injection channel 6 and the mounting groove 12 is relatively thin, so that the cold air can be transmitted to the sealing gasket 7 through the sleeve 1 structure portion, so as to realize the heat dissipation of the sealing gasket 7. A second inclined surface 10 is arranged on the inner side of the air-injection channel 6 and at a position corresponding to the air inlet 5. Through the arrangement of the second inclined surface 10, the second inclined surface 10 can transmit the wind at the air inlet 5 to the depth of the air-injection channel 6, and will not cause the wind to partially rebound just after entering the air-injection channel 6. A first inclined surface 8 is arranged on the inner side of the air-injection channel 6 and at the position of the air outlet 9. Through the arrangement of the first inclined surface 8, the first inclined surface 8 can guide the wind in the air-injection channel 6, so that the wind can be discharged from the air-injection channel 6 through the air outlet 9, thereby reducing the stagnation and avoiding the generation of turbulence.

[0031] As mentioned above, when the air guide block 3 transmits wind to the air inlet 5, the wind is conducted to the air filling channel 6 through the air inlet 5, and through the setting of the second inclined surface 10, the wind moves toward the depth of the air filling channel 6, and makes a circle through the air filling channel 6 to dissipate heat for the sealing gasket 7, and is guided by the first inclined surface 8 and discharged from the air outlet 9, thereby achieving the effect of heat dissipation for the sealing gasket 7.

[0032] See attached Figure 5 A plurality of heat-conducting strips 11 are fixed on the inner side of the mounting groove 12 and on the outer side of the sealing gasket 7, and the heat-conducting strips 11 are connected to the sealing gasket 7. The plurality of heat-conducting strips 11 all pass through the shaft sleeve 1 and extend to the air injection channel 6. The setting of the heat-conducting strips 11 enables the sealing gasket 7 to extend a portion of the heat-conducting strips 11. The heat transfer by the heat-conducting strips 11 makes the heat dissipation effect of the sealing gasket 7 better. The heat-conducting strips 11 can be made of objects with strong thermal conductivity, and can be metals such as iron, copper and other objects with good thermal conductivity.

[0033] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A high temperature resistant mechanical seal, comprising a sleeve (1), characterized in that: The inner side of the shaft sleeve (1) is rotatably connected to a rotating shaft (2); A mounting groove (12) is provided on the inner side of the shaft sleeve (1) and close to the rotating shaft (2), a plurality of sealing gaskets (7) are installed inside the mounting groove (12), and the sealing gaskets (7) are in close contact with the rotating shaft (2); At least one air guide block (3) is arranged on the outer side of the rotating shaft (2), an air guide groove (4) is arranged on the inner side of the air guide block (3), an air filling channel (6) is arranged on the end of the shaft sleeve (1) close to the air guide block (3), an air inlet (5) is arranged on the end of the air filling channel (6) close to the air guide block (3), and an air outlet (9) is arranged on the end of the air filling channel (6) away from the air guide block (3).

2. A high temperature resistant mechanical seal according to claim 1, characterized in that: The air injection flow channel (6) is arranged in an arc shape, and the air injection flow channel (6) is arranged outside the installation groove (12).

3. A high temperature resistant mechanical seal according to claim 1, characterized in that: A plurality of heat-conducting strips (11) are fixed on the inner side of the mounting groove (12) and on the outer side of the sealing gasket (7), and the heat-conducting strips (11) are connected to the sealing gasket (7). The plurality of heat-conducting strips (11) all pass through the shaft sleeve (1) and extend to the air injection channel (6).

4. A high temperature resistant mechanical seal according to claim 1, characterized in that: A second inclined surface (10) is provided on the inner side of the air filling channel (6) and at a position corresponding to the air inlet (5).

5. A high temperature resistant mechanical seal according to claim 1, characterized in that: A first inclined surface (8) is provided on the inner side of the air filling channel (6) and at the position of the air outlet (9).

6. A high temperature resistant mechanical seal according to claim 1, characterized in that: The sealing gasket (7) and the rotating shaft (2) are in contact with each other through lubricating oil.

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