Sealing structure applied to mechanical seal on slurry pump

Abstract

The utility model discloses a sealing structure applied to a mechanical seal on a slurry pump, which relates to the field of mechanical seals and comprises a shaft sleeve, a cooling water chamber is mounted on the outer wall of the shaft sleeve, a cooling water inlet is arranged on one side of the cooling water chamber, and a water outlet is arranged on the other side of the cooling water chamber. A dredging type labyrinth seal is installed on the inner wall of the shaft sleeve, a cooling water chamber is installed on the outer wall of the shaft sleeve, cooling water can be injected into the cooling water chamber through a cooling water inlet, when the shaft sleeve rotates, centrifugal force can be generated, and water can be thrown into a labyrinth groove formed in the dredging type labyrinth seal; water can flow into the water outlet through the through opening formed in the bottom of the dredging type labyrinth seal and is discharged through the water outlet, the effect of improving the sealing performance of the side close to the bracket assembly is achieved, leakage of the side, close to the bracket assembly, of the mechanical seal applied to the slurry pump is prevented, and the service life of a cooling water chamber is prolonged. Therefore, the reliability of mechanical sealing is improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seals, and specifically relates to a sealing structure of a mechanical seal applied to a slurry pump. Background Technique

[0002] A slurry pump is a pump used to transport a slurry containing solid particles. Its working principle is similar to that of an ordinary centrifugal pump. The motor drives the pump shaft to rotate, and the impeller on the pump shaft also rotates accordingly. When the impeller rotates, a centrifugal force is generated, sucking the slurry from the center of the impeller and then discharging it at high speed along the tangent direction of the impeller, entering the flow channel in the pump casing. In the flow channel, the speed of the slurry gradually decreases, and the pressure gradually increases, and finally discharges from the outlet of the pump. Currently, the mechanical seals applied to slurry pumps on the market use a skeleton oil seal as the sealing method on the side close to the bracket assembly. However, this method has leakage problems, which can cause damage to the shaft. Therefore, a sealing structure of a mechanical seal applied to a slurry pump is needed.

[0003] For the existing sealing structure of the mechanical seal applied to the slurry pump, during use, the sealing performance on the side close to the bracket assembly is poor, which affects the service life of the parts cooling water chamber. Therefore, there is an urgent need for a sealing structure of the mechanical seal applied to the slurry pump. Content of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a sealing structure of a mechanical seal applied to a slurry pump to solve the problem that the sealing performance on the side close to the bracket assembly of the existing sealing structure of the mechanical seal applied to the slurry pump is poor.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A sealing structure of a mechanical seal applied to a slurry pump, including a shaft sleeve. A cooling water chamber is installed on the outer wall of the shaft sleeve. A cooling water inlet is opened on one side of the cooling water chamber, and a water outlet is opened on the other side of the cooling water chamber. A dredging type labyrinth seal is installed on the inner wall of the shaft sleeve. A static ring seat is movably connected to the outer wall of the shaft sleeve. A spring seat is installed on one side of the cooling water chamber. A main spring is installed on the outer wall of the spring seat. A dynamic ring seat is movably connected to the outer wall of the static ring seat. A pump impeller is installed on one side of the dynamic ring seat.

[0006] A sealing chamber is installed on the outer wall of the cooling water chamber, and a sealing box is installed on the outer wall of the sealing chamber.

[0007] Preferably, the cooling water chamber is snap-connected to the static ring seat through the spring seat, and the shaft sleeve and the cooling water chamber form a rotating structure.

[0008] Preferably, the shaft sleeve is fixedly connected to the dynamic ring seat, and the dynamic ring seat and the static ring seat form a rotating structure.

[0009] Preferably, the dredging labyrinth seal is embedded in the inner wall of the cooling water chamber, and the dredging labyrinth seal is attached to the outer wall of the shaft sleeve.

[0010] Preferably, the outlet of the dredging labyrinth seal is penetrated by the water outlet.

[0011] Preferably, the sealing chamber is fixedly connected to the stationary ring seat, and the sealing chamber is attached to the sealing box.

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

[0013] 1. By providing the shaft sleeve, cooling water chamber, cooling water inlet, water outlet and dredging labyrinth seal, the cooling water chamber can be installed on the outer wall of the shaft sleeve, and the cooling water can be injected into the cooling water chamber through the cooling water inlet. When the shaft sleeve rotates, centrifugal force can be generated to throw the water into the labyrinth grooves formed inside the dredging labyrinth seal, enabling the water to flow into the water outlet through the through holes formed at the bottom of the dredging labyrinth seal and be discharged through the water outlet, thereby enhancing the sealing performance on the side close to the bracket assembly, preventing leakage on the side of the mechanical seal applied to the slurry pump close to the bracket assembly, increasing the service life of the cooling water chamber, and thus improving the reliability of the mechanical seal;

[0014] 2. By providing the sealing chamber and the sealing box, the sealing performance of the slurry pump mechanical seal can be further enhanced by installing the sealing chamber on the outer wall of the cooling water chamber and installing the sealing box on the outer wall of the sealing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a side sectional view of the shaft sleeve structure of the present utility model;

[0016] Figure 2 is a three-dimensional view of the cooling water chamber of the present utility model;

[0017] Figure 3 is of the present utility model Figure 1 The enlarged view of the structure at A in.

[0018] In the figure: 1. Shaft sleeve; 2. Cooling water chamber; 3. Cooling water inlet; 4. Water outlet; 5. Dredging labyrinth seal; 6. Sealing chamber; 7. Sealing box; 8. Spring seat; 9. Main spring; 10. Stationary ring seat; 11. Rotating ring seat; 12. Pump impeller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0020] The embodiments of the present utility model will be described below according to its overall structure.

[0021] Please refer to Figures 1-3 , a sealing structure for a mechanical seal applied to a slurry pump, including a shaft sleeve 1. A cooling water chamber 2 is installed on the outer wall of the shaft sleeve 1. A cooling water inlet 3 is provided on one side of the cooling water chamber 2, and a water outlet 4 is provided on the other side of the cooling water chamber 2. A dredging type labyrinth seal 5 is installed on the inner wall of the shaft sleeve 1. A static ring seat 10 is movably connected to the outer wall of the shaft sleeve 1. A spring seat 8 is installed on one side of the cooling water chamber 2. A main spring 9 is installed on the outer wall of the spring seat 8. A dynamic ring seat 11 is movably connected to the outer wall of the static ring seat 10. A pump impeller 12 is installed on one side of the dynamic ring seat 11. The cooling water chamber 2 is snap-connected to the static ring seat 10 through the spring seat 8, and the shaft sleeve 1 and the cooling water chamber 2 form a rotating structure. The shaft sleeve 1 is fixedly connected to the dynamic ring seat 11, and the dynamic ring seat 11 and the static ring seat 10 form a rotating structure. The dredging type labyrinth seal 5 is inlaid on the inner wall of the cooling water chamber 2 and is in contact with the outer wall of the shaft sleeve 1. The outlet of the dredging type labyrinth seal 5 is penetrated with the water outlet 4, which can improve the sealing performance on the side close to the bracket assembly, thereby increasing the service life of the cooling water chamber 2.

[0022] Please refer to Figures 1-3 , a sealing structure for a mechanical seal applied to a slurry pump. A sealing chamber 6 is installed on the outer wall of the cooling water chamber 2. A sealing box 7 is installed on the outer wall of the sealing chamber 6. The sealing chamber 6 is fixedly connected to the static ring seat 10 and is in contact with the sealing box 7, which can further improve the sealing performance of the mechanical seal of the slurry pump.

[0023] Working principle: When in use, since the cooling water chamber 2 is installed on the outer wall of the shaft sleeve 1, cooling water can be injected into the cooling water chamber 2 through the cooling water inlet 3. When the shaft sleeve 1 rotates, centrifugal force can be generated, which can throw the water into the labyrinth grooves formed inside the dredging type labyrinth seal 5. Since the dredging type labyrinth seal 5 is of a slotted design, the water can flow into the water outlet 4 through the through holes provided at the bottom of the dredging type labyrinth seal 5 and be discharged through the water outlet 4, achieving the effect of improving the sealing performance on the side close to the bracket assembly, preventing leakage on the side of the mechanical seal applied to the slurry pump close to the bracket assembly, thereby improving the reliability of the mechanical seal. Since the sealing chamber 6 is installed on the outer wall of the cooling water chamber 2 and the sealing box 7 is installed on the outer wall of the sealing chamber 6, the sealing performance of the mechanical seal of the slurry pump can be further improved. In this way, the use process of the device is completed. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0024] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the protected content of the present utility model.

[0025] 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 perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sealing structure for a mechanical seal applied to a slurry pump, including a shaft sleeve (1), characterized in that: A cooling water chamber (2) is installed on the outer wall of the bushing (1). A cooling water inlet (3) is provided on one side of the cooling water chamber (2), and a water outlet (4) is provided on the other side of the cooling water chamber (2). A dredging type labyrinth seal (5) is installed on the inner wall of the bushing (1). A static ring seat (10) is movably connected to the outer wall of the bushing (1). A spring seat (8) is installed on one side of the cooling water chamber (2). A main spring (9) is installed on the outer wall of the spring seat (8). A dynamic ring seat (11) is movably connected to the outer wall of the static ring seat (10). A pump impeller (12) is installed on one side of the dynamic ring seat (11). A seal chamber (6) is installed on the outer wall of the cooling water chamber (2), and a seal box (7) is installed on the outer wall of the seal chamber (6).

2. The sealing structure of a mechanical seal applied to a slurry pump according to claim 1, characterized in that: The cooling water chamber (2) is snap-connected to the static ring seat (10) through the spring seat (8), and the bushing (1) and the cooling water chamber (2) form a rotating structure.

3. The sealing structure of a mechanical seal applied to a slurry pump according to claim 1, characterized in that: The bushing (1) is fixedly connected to the dynamic ring seat (11), and the dynamic ring seat (11) and the static ring seat (10) form a rotating structure.

4. The sealing structure of a mechanical seal applied to a slurry pump according to claim 1, characterized in that: The dredging type labyrinth seal (5) is inlaid on the inner wall of the cooling water chamber (2), and the dredging type labyrinth seal (5) is in contact with the outer wall of the bushing (1).

5. The sealing structure of a mechanical seal applied to a slurry pump according to claim 1, characterized in that: The outlet of the dredging type labyrinth seal (5) is penetrated through the water outlet (4).

6. The sealing structure of a mechanical seal applied to a slurry pump according to claim 1, wherein: The seal chamber (6) is fixedly connected to the static ring seat (10), and the seal chamber (6) is in contact with the seal box (7).

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