Mechanical seal for filter press pump

Abstract

The utility model belongs to the technical field of mechanical seals, and discloses a mechanical seal for a filter press pump, which aims to solve the problems existing in the mechanical seal for the filter press pump in the prior art, and comprises a shaft sleeve, a movable ring seat is welded on one side of the shaft sleeve, a movable ring is arranged on one side of the movable ring seat close to the shaft sleeve, and a static ring is arranged on the other side of the movable ring. A spring seat is arranged on one side of the static ring, a static ring seat is arranged on the outer side of the static ring and the outer side of the spring seat, a cooling cover is arranged on the outer side of the static ring seat, a water inlet and a water outlet are formed in the cooling cover, a spring is arranged on the spring seat, a spring thrust seat is arranged on one side, away from the spring seat, of the spring, and a water retaining table is arranged on the spring thrust seat. A plurality of power teeth are evenly distributed on the shaft sleeve close to the spring thrust seat in the circumferential direction, and inclined faces are arranged on the sides, close to the springs, of the power teeth. Due to the fact that the power teeth are arranged on the shaft sleeve, self-circulation cooling with the water tank can be achieved, external cooling water is not needed, and meanwhile the service life of the mechanical seal is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, concretely relates to a mechanical seal for filter press pump. BACKGROUND

[0002] Mechanical seal is one of the vulnerable parts of centrifugal pump, especially when conveying corrosive and particulate medium to filter press, the mechanical seal material is required to have corrosion and wear resistance, and the long-term pressure retention also affects the service life of the mechanical seal.

[0003] At present, the mechanical seal for filter press pump mostly adopts small spring double-end face assembly type mechanical seal, such as the modified double-end face assembly type mechanical seal disclosed in CN201520466980.4, which is usually cooled by straight-through water, but due to the harsh working conditions (centrifugal pump conveying corrosive and particulate medium), the small spring of the mechanical seal is easily damaged, leading to sealing failure, and the service life of the mechanical seal is short, and the prior art cannot solve the above technical problems. SUMMARY

[0004] The utility model discloses a mechanical seal for filter press pump to solve the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of mechanical seal for filter press pump, including shaft sleeve, one side of shaft sleeve is welded with dynamic ring seat, dynamic ring seat is equipped with dynamic ring on the side close to shaft sleeve, dynamic ring is equipped with spring seat on the side away from dynamic ring, spring seat is equipped with static ring seat on the outside of static ring and spring seat, static ring seat is equipped with cooling cover on the outside, cooling cover is equipped with water inlet, water outlet, spring seat is equipped with spring, spring is equipped with spring thrust block on the side away from spring seat, spring thrust block is equipped with water baffle, the shaft sleeve is equipped with multiple power teeth in circumferential direction near spring thrust block, the side of power tooth near spring is equipped with inclined plane.

[0007] Further, the side of spring seat close to static ring is equipped with side anti-rotation table, spring seat is equipped with multiple circumferential anti-rotation tables in circumferential direction, the side anti-rotation table is matched with static ring anti-rotation groove on static ring, and the circumferential anti-rotation table is matched with static ring seat anti-rotation groove on static ring seat.

[0008] Further, the side of shaft sleeve away from dynamic ring seat is equipped with skeleton oil seal between cooling cover, the end of shaft sleeve is equipped with clamping groove, clamping groove is equipped with clamping spring, and clamping spring is in contact with the end surface of cooling cover.

[0009] Further, static ring seat and cooling cover are fastened and connected by screw, and static ring seat and cooling cover are also equipped with third O-ring.

[0010] Further, the anti-rotation pin is arranged between the dynamic ring seat and the dynamic ring, the first O-shaped ring is arranged between the outer side of the dynamic ring seat and the dynamic ring, and the second O-shaped ring is arranged between the inner side of the dynamic ring seat and the dynamic ring.

[0011] Further, the skeleton oil seal is two groups.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses a cooling water tank is set up on the shaft sleeve, can realize the self -circulation cooling with water tank, need not external cooling water, can reduce the resource waste, cool mechanical seal simultaneously, prolong the service life of mechanical seal, the utility model discloses a spring thrust bearing is set up, and the water baffle is located at the water outlet side, and the cooling water is guaranteed to flow out from the water outlet.

[0014] The dynamic ring adopts duplex steel material, the shaft sleeve adopts ordinary stainless steel, and the two are welded as a whole, so that corrosion resistance and wear resistance and economy are considered.

[0015] The side anti-rotation table and the circumferential anti-rotation table are arranged on the spring seat, the side anti-rotation table is matched with the anti-rotation groove of the static ring to prevent the static ring from rotating, and the circumferential anti-rotation table is matched with the anti-rotation groove on the static ring seat to prevent the spring seat from rotating.

[0016] The utility model discloses a water sealing side adopts two skeleton oil seals, can better seal cooling water, compared with the traditional double-end mechanical seal, simple structure is not easy to damage, can prolong the service life of mechanical seal. DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model.

[0018] Figure 2 It is the side view of the utility model.

[0019] Figure 3 It is the structure schematic diagram of the shaft sleeve of the utility model.

[0020] Figure 4 It is the A-A section view of the utility model. Figure 3

[0021] Figure 5 It is the structure schematic diagram of the spring seat of the utility model.

[0022] Figure 6 It is the side view of the utility model. Figure 5

[0023] Figure 7 It is the structure schematic diagram of the spring thrust bearing of the utility model.

[0024] ​​The reference signs have the following meanings: 1. moving ring seat; 2. anti-rotation pin; 3. first O-ring; 4. moving ring; 5. second O-ring; 6. stationary ring; 7. shaft sleeve; 8. stationary ring seat; 9. spring seat; 10. third O-ring; 11. cooling cover; 12. spring; 13. spring thrust block; 14. skeleton oil seal; 15. clamping spring; 16. power tooth; 17. side anti-rotation platform; 18. circumferential anti-rotation platform; 19. water retaining platform; 20. water inlet; 21. water outlet; 22. inclined surface; 23. screw. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings and specific embodiments.

[0026] As Figures 1-7 shown, a mechanical seal for a filter press pump comprises a shaft sleeve 7, one side of the shaft sleeve 7 is welded with a moving ring seat 1, the moving ring seat 1 is provided with a moving ring 4 close to one side of the shaft sleeve 7, an anti-rotation pin 2 is arranged between the moving ring seat 1 and the moving ring 4, a first O-ring 3 is further arranged between the outer side of the moving ring seat 1 and the moving ring 4, and a second O-ring 5 is arranged between the inner side of the moving ring seat 1 and the moving ring 4. The moving ring 4 is provided with a stationary ring 6 away from one side of the moving ring seat 1, the stationary ring 6 is provided with a spring seat 9 away from one side of the moving ring 4, the outer side of the stationary ring 6 and the spring seat 9 is provided with a stationary ring seat 8, the spring seat 9 is provided with a side anti-rotation platform 17 close to one side of the stationary ring 6, and the spring seat 9 is provided with a plurality of circumferential anti-rotation platforms 18 in the circumferential direction, the side anti-rotation platform 17 is matched with a stationary ring anti-rotation groove on the stationary ring 6, and the circumferential anti-rotation platforms 18 are matched with stationary ring seat anti-rotation grooves on the stationary ring seat 8.

[0027] The stationary ring seat 8 is provided with a cooling cover 11 on the outer side, the stationary ring seat 8 and the cooling cover 11 are fastened and connected through a screw 23, a third O-ring 10 is further arranged between the stationary ring seat 8 and the cooling cover 11, the cooling cover 11 is provided with a water inlet 20 and a water outlet 21, the spring seat 9 is provided with a spring 12, the spring 12 is provided with a spring thrust block 13 away from one side of the spring seat 9, the spring thrust block 13 is provided with a water retaining platform 19, the shaft sleeve 7 is provided with a plurality of power teeth 16 uniformly distributed in the circumferential direction close to the spring thrust block 13, and the power teeth 16 are provided with an inclined surface 22 close to one side of the spring 12. Two groups of skeleton oil seals 14 are arranged between the shaft sleeve 7 and the cooling cover 11 away from one side of the moving ring seat 1, the shaft sleeve 7 is provided with a clamping groove at the end, the clamping groove is provided with a clamping spring 15, and the clamping spring 15 is in contact with the end surface of the cooling cover 11.

[0028] In operation, the mechanical seal is installed on the pump shaft of the centrifugal pump, the shaft sleeve 7 rotates with the pump shaft, the power tooth 16 on the shaft sleeve 7 provides power for the cooling water, and the self-circulation cooling with the water tank can be realized, the third O-ring 10 between the static ring seat 8 and the cooling cover 11 can prevent the leakage of the cooling water. The first O-ring 3 between the dynamic ring seat 1 and the dynamic ring 4 can prevent the leakage of the pumped medium, the anti-rotation pin 2 can prevent the relative movement of the dynamic ring 4 and the dynamic ring seat 1, the second O-ring 5 can prevent the dynamic ring 4 from falling off, and the O-ring between the static ring 6 and the static ring seat 8 can prevent the leakage of the pumped medium. The skeleton oil seal 14 can better seal the cooling water, and the clamping groove at the end of the shaft sleeve 7 is used to install the clamping spring 15, and the clamping spring 15 can prevent the shaft sleeve from falling off.

Claims

1. A mechanical seal for a filter press pump comprising a bushing (7) characterized by: The side of the shaft sleeve (7) is welded with a moving ring seat (1), the moving ring seat (1) is equipped with a moving ring (4) near the side of the shaft sleeve (7), the side of the moving ring (4) away from the moving ring seat (1) is equipped with a static ring (6), the side of the static ring (6) away from the moving ring (4) is equipped with a spring seat (9), the outside of the static ring (6) and the spring seat (9) is equipped with a static ring seat (8), the outside of the static ring seat (8) is equipped with a cooling cover (11), the cooling cover (11) is equipped with a water inlet (20) and a water outlet (21), the spring seat (9) is equipped with a spring (12), the side of the spring (12) away from the spring seat (9) is equipped with a spring thrust seat (13), the spring thrust seat (13) is equipped with a water blocking platform (19), the shaft sleeve (7) is equipped with a plurality of power teeth (16) near the spring thrust seat (13) and along the circumferential direction, the side of the power tooth (16) near the spring (12) is equipped with an inclined surface (22).

2. A mechanical seal for a filter press pump as defined in claim 1, characterized in that: The side of the spring seat (9) near the static ring (6) is equipped with a side anti-rotation platform (17), the spring seat (9) is equipped with a plurality of circumferential anti-rotation platforms (18) along the circumferential direction, the side anti-rotation platform (17) is matched with a static ring anti-rotation groove on the static ring (6), and the circumferential anti-rotation platform (18) is matched with a static ring seat anti-rotation groove on the static ring seat (8).

3. A mechanical seal for a filter press pump as defined in claim 2, characterized in that: The side of the shaft sleeve (7) away from the moving ring seat (1) is equipped with a skeleton oil seal (14) between the cooling cover (11), the end of the shaft sleeve (7) is equipped with a clamping groove, the clamping groove is equipped with a clamping spring (15), and the clamping spring (15) is in contact with the end face of the cooling cover (11).

4. A mechanical seal for a filter press pump as defined in claim 1, wherein: The static ring seat (8) and the cooling cover (11) are fastened and connected through a screw (23), and the static ring seat (8) and the cooling cover (11) are further equipped with a third O-shaped ring (10).

5. A mechanical seal for a filter press pump as defined in claim 1, wherein: The moving ring seat (1) and the moving ring (4) are equipped with an anti-rotation pin (2), the first O-shaped ring (3) is further equipped between the outside of the moving ring seat (1) and the moving ring (4), and the second O-shaped ring (5) is equipped between the inside of the moving ring seat (1) and the moving ring (4).

6. A mechanical seal for a filter press pump as defined in claim 3, wherein: The skeleton oil seal (14) is two groups.

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