Sealing cavity structure of slurry pump

Abstract

The utility model relates to the technical field of slurry pump sealing, in particular to a sealing cavity structure of a slurry pump, which comprises a main shaft, a sealing cavity and a mechanical sealing component are arranged around the main shaft, the sealing cavity is communicated with a water tank through a water inlet pipe and a water outlet pipe, and the water tank is used for supplying water. A gap of 1-2 mm exists between the inner edge of the longitudinal partition plate and the mechanical sealing component to prevent frictional contact, the longitudinal partition plate isolates the sealing cavity and forms pressure difference on the two sides of the longitudinal partition plate under rotation disturbance of the main shaft, a water inlet and a water outlet of the sealing cavity are divided into a high-pressure area and a low-pressure area, and automatic circulation of cooling liquid in the water tank is achieved through the pressure difference at the water inlet and the water outlet. The structure is simple, the cost is low, meanwhile, the heat exchange efficiency is improved, and the market space is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry pump seals, in particular to a slurry pump sealing cavity structure. Background Art

[0002] Mechanical seal is a common sealing method for slurry pumps. The sealing purpose is achieved by close contact between the mechanical seal components and the main shaft. After mechanical sealing, it is necessary to connect the external cooling liquid to provide cooling and lubrication for the mechanical seal components. Most cooling liquids use circulating water. However, in many places where it is inconvenient to provide flowing water sources, the use of water tanks to supply water is a common form.

[0003] In the existing technology, most of them use special pump effect rings to provide circulation power for the cooling liquid in the water tank. This method requires high intermittent precision between the pump effect ring and the sealing cavity, is difficult to manufacture, and has high overall cost. Alternatively, no structural design is adopted and the water circulation is directly supplied by the thermal siphon effect generated by the sealing friction. The water circulation is extremely slow and the effect is not ideal. Utility Model Content

[0004] In order to improve the sealing problem of the slurry pump in the above background technology, the utility model provides a sealing cavity structure of a slurry pump.

[0005] The utility model provides a slurry pump sealing chamber structure adopting the following technical solutions:

[0006] A slurry pump sealing chamber structure includes a main shaft, a sealing chamber and a mechanical sealing component arranged around the end of the main shaft, a water inlet and a water outlet are opened at the top of the sealing chamber, and a longitudinal partition is arranged inside the sealing chamber between the water inlet and the water outlet. The longitudinal partition isolates the sealing chamber and forms a pressure difference on both sides of the longitudinal partition under the rotation disturbance of the main shaft.

[0007] Preferably, the longitudinal partition is integrally cast and the outer edge of the longitudinal partition is welded to the inner wall of the sealing cavity.

[0008] Preferably, there is a gap of 1 to 2 mm between the inner edge of the longitudinal partition and the mechanical sealing component. The gap prevents frictional contact between the longitudinal partition and the mechanical sealing component.

[0009] Preferably, the side of the longitudinal partition facing the water inlet is a low-pressure area, and the side of the longitudinal partition facing the water outlet is a high-pressure area.

[0010] Preferably, a water inlet pipe is provided at the water inlet, a water outlet pipe is provided at the water outlet, and the sealed cavity is connected to a water tank through the water inlet pipe and the water outlet pipe, and water is supplied by the water tank.

[0011] Preferably, a heat dissipation device is installed on one side of the water tank, and the heat dissipation device dissipates heat from the mixed cooling liquid in the water tank.

[0012] Preferably, sealing rings are provided at the connection position between the sealing cavity and the water inlet pipe, and at the connection position between the sealing cavity and the water outlet pipe. The sealing rings are installed tightly to prevent leakage during the water flow process and affect use.

[0013] To sum up, the utility model has the following beneficial technical effects: the utility model designs a sealed chamber structure for a slurry pump, welds a longitudinal partition inside the sealed chamber, isolates the inlet and outlet of the sealed chamber into a high-pressure area and a low-pressure area, and uses rotating centrifugal force to automatically increase the pressure. The pressure difference at the inlet and outlet is used to realize the automatic circulation of the cooling liquid in the water tank. There is no need to set up an additional pump efficiency ring seal to provide circulation power for the water in the water tank. The structure is simple and the cost is low. At the same time, the heat exchange efficiency is improved, and there is a broader market space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of the overall structure of a slurry pump sealing chamber structure according to an embodiment of the utility model;

[0015] Figure 2 yes Figure 1 A in the middle is an enlarged structural diagram;

[0016] Figure 3 It is along Figure 2 Cross-section along the midline BB;

[0017] Figure 4 This is a schematic diagram of the flow direction of the cooling liquid in the sealed cavity according to an embodiment of the present utility model;

[0018] Figure 5 It is a structural schematic diagram of a water tank according to an embodiment of the present utility model.

[0019] Explanation of the accompanying symbols: 1. Main shaft; 2. Sealing chamber; 3. Mechanical sealing component; 4. Water inlet; 5. Water outlet; 6. Longitudinal partition; 7. Low-pressure area; 8. High-pressure area; 9. Water inlet pipe; 10. Water outlet pipe; 11. Water tank; 12. Heat dissipation equipment; 13. Sealing ring; 14. Cooling liquid. DETAILED DESCRIPTION

[0020] The following combination Figure 1-Figure 5 The utility model is described in further detail.

[0021] The embodiment of the utility model discloses a sealing cavity structure of a slurry pump.

[0022] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4A slurry pump sealing chamber structure includes a main shaft 1, a sealing chamber 2 and a mechanical sealing component 3 are arranged around the main shaft 1, a water inlet 4 and a water outlet 5 are opened at the top of the sealing chamber 2, and a longitudinal partition 6 is arranged inside the sealing chamber 2 between the position of the water inlet 4 and the position of the water outlet 5. The longitudinal partition 6 isolates the sealing chamber 2 and forms a pressure difference on both sides of the longitudinal partition 6 under the rotation disturbance of the main shaft 1.

[0023] Reference Figure 3 、 Figure 4 The longitudinal partition 6 is integrally cast and the outer edge of the longitudinal partition 6 is welded to the inner wall of the sealing cavity 2. The longitudinal partition 6 can be integrally cast and formed by welding, inlaying and other processes.

[0024] Reference Figure 3 There is a gap of 1 to 2 mm between the inner edge of the longitudinal partition 6 and the mechanical sealing component 3 to prevent frictional contact with the mechanical sealing component 3.

[0025] Reference Figure 4 The side of the longitudinal partition 6 facing the water inlet 4 is a low-pressure area 7, and the side of the longitudinal partition 6 facing the water outlet 5 is a high-pressure area 8. Figure 4 In FIG. 1 , the arrow direction is the flow direction of the cooling liquid 14 .

[0026] Reference Figure 1 、 Figure 3 、 Figure 5 A water inlet pipe 9 is provided at the water inlet 4, a water outlet pipe 10 is provided at the water outlet 5, and the sealed cavity 2 is connected to the water tank 11 through the water inlet pipe 9 and the water outlet pipe 10, and the water tank 11 is used for water supply.

[0027] Reference Figure 5 A heat dissipation device 12 is installed on one side of the water tank 11, and a heat dissipation device such as a heat sink and a fan is used to dissipate heat from the mixed cooling liquid 14 in the water tank 11.

[0028] Reference Figure 3 Sealing rings 13 are provided at the connection positions between the sealing chamber 2 and the water inlet pipe 9 and the connection positions between the sealing chamber 2 and the water outlet pipe 10 to prevent leakage during the water flow process and affect use.

[0029] The implementation principle of the sealing chamber structure of a slurry pump in an embodiment of the present utility model is as follows: during installation, a longitudinal partition 6 is welded inside the sealing chamber 2, and a gap of 1 to 2 mm exists between the inner edge of the longitudinal partition 6 and the mechanical sealing component 3, thereby isolating the position of the water inlet 4 and the position of the water outlet 5 of the sealing chamber 2 into a low-pressure area 7 and a high-pressure area 8.

[0030] When the slurry pump is started, the cooling liquid 14 inside the sealing chamber 2 rotates in the same direction as the main shaft 1 under the rotational disturbance, and forms a higher pressure and flow rate when blocked by the longitudinal partition 6. The cooling liquid 14 naturally flows out along the water outlet 5 and flows to the water tank 11 through the outlet pipe 10, and is automatically pressurized by the centrifugal force of the rotation of the main shaft 1; on the other side of the longitudinal partition 6, as the mechanical seal component 3 starts to drive the cooling liquid 14 to rotate, low pressure is formed at this part. At this time, the cooling liquid 14 in the water tank 11 continuously flows back to the sealing chamber 2 through the water inlet pipe 9 under the action of gravity.

[0031] Under the repeated action of the above steps, the cooling liquid 14 in the water tank 11 forms a self-circulation, taking away the heat generated by the mechanical sealing component 3. The cooling liquid 14 is mixed in the water tank 11 and dissipated through the heat dissipation device 12 to ensure the normal operation of the entire equipment.

[0032] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slurry pump sealing chamber structure, comprising a main shaft (1), a sealing chamber (2) and a mechanical sealing component (3) arranged around the main shaft (1), characterized in that: A water inlet (4) and a water outlet (5) are provided at the top of the sealed cavity (2). A longitudinal partition (6) is provided inside the sealed cavity (2) between the location of the water inlet (4) and the location of the water outlet (5). The longitudinal partition (6) isolates the sealed cavity (2) and forms a pressure difference on both sides of the longitudinal partition (6) under the rotation disturbance of the main shaft (1).

2. A slurry pump sealing chamber structure according to claim 1, characterized in that: The longitudinal partition (6) is integrally cast, and the outer edge of the longitudinal partition (6) is welded to the inner wall of the sealing cavity (2).

3. A slurry pump sealing chamber structure according to claim 2, characterized in that: There is a gap of 1 to 2 mm between the inner edge of the longitudinal partition (6) and the mechanical sealing component (3).

4. The sealing chamber structure of a slurry pump according to claim 1, characterized in that: The side of the longitudinal partition (6) facing the location of the water inlet (4) is a low-pressure area (7), and the side of the longitudinal partition (6) facing the location of the water outlet (5) is a high-pressure area (8).

5. The sealing chamber structure of a slurry pump according to claim 1, characterized in that: The water inlet (4) is provided with a water inlet pipe (9), the water outlet (5) is provided with a water outlet pipe (10), and the sealed cavity (2) is connected to the water tank (11) through the water inlet pipe (9) and the water outlet pipe (10).

6. A slurry pump sealing chamber structure according to claim 5, characterized in that: A heat dissipation device (12) is installed on one side of the water tank (11).

7. The sealing chamber structure of a slurry pump according to claim 5, characterized in that: Sealing rings (13) are provided at the connection position between the sealing cavity (2) and the water inlet pipe (9), and at the connection position between the sealing cavity (2) and the water outlet pipe (10).

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