Mechanical seal of desulfurization pump

Abstract

The utility model relates to the technical field of mechanical seals, in particular to a desulfurization pump mechanical seal which comprises a shaft sleeve, the surface of the shaft sleeve is fixedly connected with a first ring seat, the inner side of the first ring seat is movably connected with a movable ring, the surface of the shaft sleeve is sleeved with a second ring seat, and the inner side of the second ring seat is fixedly connected with a static ring. And the surface of the second ring seat is sleeved with a gland. The movable rod can stably move in the fixed rod under the matching action of the limiting block and the limiting groove, and the movable ring can be limited under the matching action of the sliding rod and the sliding groove, so that the stable movement of the movable rod in the fixed rod can be better guaranteed, the spring can be better compressed, and the service life of the spring is prolonged. And the stress uniformity of the spring is guaranteed, so that the spring is not prone to deflection, the service life of the spring and the pressing force on the movable ring and the static ring can be guaranteed, the movable ring and the static ring can be better attached, and the leakage-proof quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically to mechanical seals for desulfurization pumps. Background Technology

[0002] A desulfurization pump is an industrial pump specifically designed for flue gas desulfurization systems. Its main function is to circulate slurry or liquid from the absorber to help remove sulfur dioxide from the flue gas. To prevent the slurry or liquid inside the desulfurization pump from leaking into the external environment, a mechanical seal is typically used. A mechanical seal is a device used to prevent fluid leakage and is widely used in rotating equipment (such as pumps and compressors). It achieves its leak-proof function by having two precision-machined planes (a rotating ring and a stationary ring) fit together and maintain a seal during relative motion. The use of mechanical seals prevents slurry leakage from polluting the environment or wasting resources, while also preventing damage to bearings or other components due to leakage.

[0003] In existing technologies, when sealing a desulfurization pump with a mechanical seal, the spring provides the clamping force between the sealing surfaces, causing the dynamic ring and the stationary ring to fit together, thus preventing leakage. However, because the spring cannot be properly guided during use, it may become misaligned due to uneven force when compressed, which can compromise the lifespan and quality of the spring and also prevent it from providing adequate clamping force to the sealing surfaces, thus compromising the quality of leak prevention. Therefore, to solve the above problems, a mechanical seal for desulfurization pumps is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical seal for desulfurization pumps to solve the problems mentioned in the background art, such as the inability to properly guide the spring during use, which may cause the spring to become skewed due to uneven force when compressed, thus failing to ensure the service life and quality of the spring, and also failing to provide sufficient clamping force to the sealing surface, which is not conducive to ensuring the quality of leak prevention.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical seal for a desulfurization pump, comprising a bushing, a first ring seat fixedly connected to the surface of the bushing, a rotating ring movably connected to the inner side of the first ring seat, a second ring seat sleeved on the surface of the bushing, a stationary ring fixedly connected to the inner side of the second ring seat, and a pressure cap sleeved on the surface of the second ring seat, wherein the second ring seat, the stationary ring, and the pressure cap are all movably connected to the bushing;

[0006] A guide mechanism is provided on the inner side of the first ring seat. The guide mechanism includes a fixed rod, which is fixedly connected to the inner wall of the first ring seat. A spring is fixedly connected to the inner wall of the fixed rod. A connecting block is fixedly connected to the surface of the spring. A movable rod is fixedly connected to the end of the connecting block away from the spring. The end of the movable rod away from the connecting block is fixedly connected to the moving ring. A limit block is fixedly connected to the surface of the movable rod. A limit groove is formed on the inner wall of the fixed rod.

[0007] Preferably, the guiding mechanism further includes a slide rod, which is fixedly connected to the surface of the moving ring, and the inner wall of the first ring seat is provided with a sliding groove.

[0008] Preferably, the fixing rods are evenly distributed in a ring array on the inner wall of the first ring seat, one end of the spring is fixedly connected to the fixing rod, the other end of the spring is fixedly connected to the connecting block, and the connecting block and the movable rod are both movable inside the fixing rod.

[0009] Preferably, the limiting block is movable inside the limiting groove, the slide rod is fixedly connected to the moving ring in two sets, and the end of the slide rod away from the moving ring is movably connected to the slide groove.

[0010] Preferably, the surface of the gland is provided with an auxiliary mechanism, the auxiliary mechanism including a first sealing gasket, the first sealing gasket being fixedly connected to the surface of the first ring seat, a second sealing gasket being fixedly connected to the surface of the second ring seat, a third sealing gasket being fixedly connected to the inner wall of the gland, a first sealing block being fixedly connected to the surface of the gland, a second sealing block being fixedly connected to the surface of the first ring seat, and a sealing groove being formed on the inner side of the second sealing block.

[0011] Preferably, the sealing groove is formed in an annular shape inside the second sealing block, and the first sealing block is movable inside the sealing groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. Through the cooperation of the limiting block and the limiting groove, the movable rod can move stably within the fixed rod. Through the cooperation of the sliding rod and the sliding groove, the moving ring can be limited, thus better ensuring the stable movement of the movable rod within the fixed rod. This allows the spring to be compressed better, which helps ensure the uniformity of the spring force and prevents the spring from tilting, thereby ensuring the service life of the spring. The clamping force on the moving and stationary rings also allows them to fit more closely, which helps improve the leak-proof quality.

[0014] 2. The first and second sealing gaskets enable sealing between the first and second ring seats. The third sealing gasket allows for proper contact with the first and second ring seats, achieving a double sealing effect and enhancing the sealing performance. Furthermore, the coordinated arrangement of the first and second sealing blocks allows the first sealing block to move within the sealing groove during relative movement of the rotating and stationary rings, thus sealing the gland with the first and second ring seats and further ensuring leak-proof performance. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a front sectional view of the structure of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0018] Figure 4 This is an exploded cross-sectional view of the structure of this utility model.

[0019] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B;

[0020] Figure 6 This is an exploded cross-sectional view of the structure of the fixed rod and the movable rod of this utility model.

[0021] In the diagram: 1. Bushing; 11. First ring seat; 12. Moving ring; 13. Second ring seat; 14. Stationary ring; 15. Pressure cap; 2. Fixed rod; 21. Spring; 22. Connecting block; 23. Moving rod; 24. Limiting block; 25. Limiting groove; 26. Sliding rod; 27. Sliding groove; 3. First sealing gasket; 31. Second sealing gasket; 32. Third sealing gasket; 33. First sealing block; 34. Second sealing block; 35. Sealing groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 One embodiment provided by this utility model:

[0024] The mechanical seal of the desulfurization pump includes a bushing 1, a first ring seat 11 fixedly connected to the surface of the bushing 1, a rotating ring 12 movably connected to the inner side of the first ring seat 11, a second ring seat 13 sleeved on the surface of the bushing 1, a stationary ring 14 fixedly connected to the inner side of the second ring seat 13, and a gland 15 sleeved on the surface of the second ring seat 13. The second ring seat 13, the stationary ring 14 and the gland 15 are all movably connected to the bushing 1. Through the mutual contact of the rotating ring 12 and the stationary ring 14, and the sealing is maintained during relative movement, the desulfurization pump can achieve the anti-leakage function.

[0025] A guide mechanism is provided on the inner side of the first ring seat 11. The guide mechanism includes a fixed rod 2, which is fixedly connected to the inner wall of the first ring seat 11. A spring 21 is fixedly connected to the inner wall of the fixed rod 2. A connecting block 22 is fixedly connected to the surface of the spring 21. A movable rod 23 is fixedly connected to the end of the connecting block 22 away from the spring 21. The end of the movable rod 23 away from the connecting block 22 is fixedly connected to the moving ring 12. A limit block 24 is fixedly connected to the surface of the movable rod 23. A limit groove 25 is opened on the inner wall of the fixed rod 2. Through the cooperation of the limit block 24 and the limit groove 25, the movable rod 23 can be limited, thereby guiding the spring 21 and preventing the spring 21 from tilting. This can better ensure the pressing force of the moving ring 12 on the stationary ring 14.

[0026] Furthermore, the guiding mechanism also includes a slide rod 26, which is fixedly connected to the surface of the moving ring 12. The inner wall of the first ring seat 11 is provided with a groove 27. By setting the slide rod 26 and the groove 27, the movement of the moving ring 12 can be limited, which makes it easier for the moving ring 12 to fit better with the stationary ring 14. At the same time, it can ensure the stability of the spring 21 in the fixed rod 2, so that the force on the spring 21 is more uniform.

[0027] Furthermore, the fixed rods 2 are evenly distributed in a ring array on the inner wall of the first ring seat 11. One end of the spring 21 is fixedly connected to the fixed rod 2, and the other end of the spring 21 is fixedly connected to the connecting block 22. The connecting block 22 and the movable rod 23 are both movable inside the fixed rod 2. By connecting the fixed rod 2 and the connecting block 22 through the spring 21, the spring 21 can apply a certain force to the connecting block 22, thereby enabling the movable rod 23 to drive the moving ring 12 and the stationary ring 14 to make good contact, thus ensuring the fitting effect.

[0028] Furthermore, the limiting block 24 is movable inside the limiting groove 25, and the slide rod 26 is fixedly connected to the moving ring 12 in two sets. The end of the slide rod 26 away from the moving ring 12 is movably connected to the slide groove 27. By setting the limiting block 24, the limiting block 24 can move inside the limiting groove 25, which can ensure the stable movement of the connecting block 22 and the movable rod 23 within the fixed rod 2, thereby ensuring the stability of the compression of the spring 21.

[0029] Furthermore, the surface of the pressure cap 15 is provided with an auxiliary mechanism, which includes a first sealing gasket 3. The first sealing gasket 3 is fixedly connected to the surface of the first ring seat 11. The surface of the second ring seat 13 is fixedly connected with a second sealing gasket 31. The inner wall of the pressure cap 15 is fixedly connected with a third sealing gasket 32. The surface of the pressure cap 15 is fixedly connected with a first sealing block 33. The surface of the first ring seat 11 is fixedly connected with a second sealing block 34. A sealing groove 35 is opened on the inner side of the second sealing block 34. Through the tight fit of the first sealing gasket 3 and the second sealing gasket 31, the seal between the first ring seat 11 and the second ring seat 13 can be achieved. Through the setting of the third sealing gasket 32 ​​and its fit with the surfaces of the first ring seat 11, the second ring seat 13, the first sealing gasket 3 and the second sealing gasket 31, the sealing effect is better, and thus better leakage prevention is achieved.

[0030] Furthermore, the sealing groove 35 is annularly formed inside the second sealing block 34, and the first sealing block 33 is movable inside the sealing groove 35. By forming the sealing groove 35, when the moving ring 12 and the stationary ring 14 move relative to each other, the first sealing block 33 can move inside the sealing groove 35. Through the cooperation of the first sealing block 33 and the second sealing block 34, the sealing between the gland 15 and the first ring seat 11 and the second ring seat 13 can be achieved.

[0031] Working principle: During use, the setting of the limiting block 24 and the opening of the limiting groove 25 enable the connecting block 22 and the movable rod 23 to move stably within the fixed rod 2, and realize the sliding of the limiting block 24 within the limiting groove 25. The setting of the sliding rod 26 and the opening of the sliding groove 27 enable the moving ring 12 to move stably within the first ring seat 11 and the surface of the bushing 1, and realize the sliding of the sliding rod 26 within the sliding groove 27. This can guide the spring 21, making the force on the spring 21 more uniform and less prone to skewing.

[0032] The surfaces of the first sealing gasket 3 and the second sealing gasket 31 are in contact, which can achieve a seal on the first ring seat 11 and the second ring seat 13. The third sealing gasket 32 ​​is in contact with the surfaces of the first ring seat 11, the second ring seat 13, the first sealing gasket 3 and the second sealing gasket 31, which can achieve a seal between the gland 15 and the first ring seat 11 and the second ring seat 13. The opening of the sealing groove 35 allows the first sealing block 33 to move within the sealing groove 35 when the moving ring 12 and the stationary ring 14 rotate relative to each other, thus achieving a double seal between the gland 15 and the first ring seat 11 and the second ring seat 13.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A mechanical seal for a desulfurization pump, comprising a bushing (1), wherein a first ring seat (11) is fixedly connected to the surface of the bushing (1), a rotating ring (12) is movably connected to the inner side of the first ring seat (11), a second ring seat (13) is sleeved on the surface of the bushing (1), a stationary ring (14) is fixedly connected to the inner side of the second ring seat (13), and a pressure cap (15) is sleeved on the surface of the second ring seat (13), wherein the second ring seat (13), the stationary ring (14) and the pressure cap (15) are all movably connected to the bushing (1); Its features are, A guide mechanism is provided on the inner side of the first ring seat (11). The guide mechanism includes a fixed rod (2). The fixed rod (2) is fixedly connected to the inner wall of the first ring seat (11). A spring (21) is fixedly connected to the inner wall of the fixed rod (2). A connecting block (22) is fixedly connected to the surface of the spring (21). A movable rod (23) is fixedly connected to the end of the connecting block (22) away from the spring (21). The end of the movable rod (23) away from the connecting block (22) is fixedly connected to the moving ring (12). A limit block (24) is fixedly connected to the surface of the movable rod (23). A limit groove (25) is opened on the inner wall of the fixed rod (2).

2. The mechanical seal for a desulfurization pump according to claim 1, characterized in that: The guiding mechanism also includes a slide rod (26), which is fixedly connected to the surface of the moving ring (12), and the inner wall of the first ring seat (11) is provided with a slide groove (27).

3. The mechanical seal for a desulfurization pump according to claim 1, characterized in that: The fixed rods (2) are evenly distributed in a ring array on the inner wall of the first ring seat (11). One end of the spring (21) is fixedly connected to the fixed rod (2), and the other end of the spring (21) is fixedly connected to the connecting block (22). The connecting block (22) and the movable rod (23) are both movable inside the fixed rod (2).

4. The mechanical seal for a desulfurization pump according to claim 2, characterized in that: The limiting block (24) is movable inside the limiting groove (25), the slide rod (26) is fixedly connected to the moving ring (12) in two groups, and the end of the slide rod (26) away from the moving ring (12) is movably connected to the slide groove (27).

5. The mechanical seal for a desulfurization pump according to claim 1, characterized in that: The surface of the pressure cap (15) is provided with an auxiliary mechanism, which includes a first sealing gasket (3), the first sealing gasket (3) is fixedly connected to the surface of the first ring seat (11), the surface of the second ring seat (13) is fixedly connected with a second sealing gasket (31), the inner wall of the pressure cap (15) is fixedly connected with a third sealing gasket (32), the surface of the pressure cap (15) is fixedly connected with a first sealing block (33), the surface of the first ring seat (11) is fixedly connected with a second sealing block (34), and a sealing groove (35) is opened on the inner side of the second sealing block (34).

6. The mechanical seal for a desulfurization pump according to claim 5, characterized in that: The sealing groove (35) is formed in a ring shape inside the second sealing block (34), and the first sealing block (33) is movable inside the sealing groove (35).

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