A water-cooled rotary control shaft seal structure for marine centrifugal pumps

Abstract

This utility model discloses a water-cooled rotary control shaft seal structure for a marine centrifugal pump, including a pump body. A pump cover is installed on the side end face of the pump body. A limit screw is movably connected inside the pump cover. A protective cover is fixedly connected to the side surface of the pump cover. A fixing ring is fixedly connected to the circumferential surface of the protective cover. A mounting block is fixedly connected to the circumferential surface of the connector. A fixing post is fixedly connected to the inner side wall of the mounting groove. A compression spring is sleeved on the outside of the fixing post. A fixing block is fixedly connected to the inner side wall of the mounting groove, and the end of the compression spring is in contact with the side surface of the fixing block. A locking block is slidably connected to the outside of the fixing post, and the end of the locking block away from the compression spring engages with the inside of the locking groove. This utility model, by setting the fixing post, compression spring, locking block, and locking groove, improves the efficiency of connector disassembly. By setting the first sealing ring and the second sealing ring, the internal sealing performance of the device is further enhanced.

Description

Technical Field

[0001] This utility model relates to the field of shaft seal structure technology, and in particular to a water-cooled rotary control shaft seal structure for marine centrifugal pumps. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. Centrifugal pumps work by using the centrifugal motion of water caused by the rotation of the impeller. Before starting the pump, the pump casing and suction pipe must be filled with water. Then the motor is started, and the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's discharge pipe through the flow channel of the volute casing.

[0003] The existing water-cooled rotary control shaft seal structure for marine centrifugal pumps suffers from aging of the internal sealing ring due to environmental factors. Since the sealing ring is installed inside the device and connected by flanges or bolts, it requires specialized tools for disassembly when replacing the sealing ring, which is inconvenient. Therefore, a water-cooled rotary control shaft seal structure for marine centrifugal pumps is needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a water-cooled rotary control shaft seal structure for marine centrifugal pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a water-cooled rotary control shaft seal structure for a marine centrifugal pump, comprising a pump body, an inlet and an outlet on the outside of the pump body, a pump cover installed on the side end face of the pump body, a limit screw movably connected inside the pump cover, and the pump cover being fixedly connected to the pump body by the limit screw, a protective cover fixedly connected to the side surface of the pump cover, a connector movably connected inside the protective cover, a fixing ring fixedly connected to the circumferential surface of the protective cover, and a slot formed on the inner side wall of the fixing ring, an mounting block fixedly connected to the circumferential surface of the connector, an mounting groove formed at the end of the mounting block away from the connector, a fixing post fixedly connected to the inner side wall of the mounting groove, a compression spring sleeved on the outside of the fixing post, a fixing block fixedly connected to the inner side wall of the mounting groove, and the end of the compression spring fitting against the side surface of the fixing block, and a locking block slidably connected to the outside of the fixing post, with the end of the locking block away from the compression spring engaging with the inside of the locking groove.

[0006] Furthermore: a second bearing is fixedly connected inside the protective cover, a pump shaft is rotatably connected inside the second bearing, a limit groove is formed on the side surface of the pump shaft, a limit post is engaged inside the limit groove, a connecting shaft is fixedly connected to the end of the limit post, a first bearing is rotatably connected to the outside of the connecting shaft, and the first bearing is fixedly connected to the inner side wall of the connector.

[0007] Furthermore, the protective cover has a first annular groove on its side surface, a first sealing ring is installed inside the first annular groove, and the end of the connector is tightly fitted with the side surface of the first sealing ring.

[0008] Furthermore: a T-shaped limiting ring is fixedly connected to the inner wall of the protective cover, a connecting ring is fixedly connected to the inner wall of the connector, a second annular groove is opened on the side surface of the connecting ring, a second sealing ring is installed inside the second annular groove, and the end of the T-shaped limiting ring is in contact with the side surface of the second sealing ring.

[0009] Furthermore, the pump shaft is fixedly connected to the output end of a motor at the end away from the protective cover, and a base is provided at the bottom of the motor and the pump body.

[0010] Furthermore, the motor and the pump body are both fixedly connected to each other with connecting flanges, and the two connecting flanges are fixedly connected by connecting bolts.

[0011] This utility model has the following beneficial effects:

[0012] 1. Compared with the prior art, this water-cooled rotary control shaft seal structure for marine centrifugal pumps, by setting a fixed column, a compression spring, a locking block, and a locking groove, allows the locking blocks on both sides to compress the compression spring during disassembly of the connector, moving the locking blocks into the mounting groove. This facilitates the separation of the locking blocks from the locking groove inside the fixed ring, enabling the disassembly of the connector from the protective cover and improving the efficiency of connector disassembly.

[0013] 2. Compared with the prior art, the water-cooled rotary control shaft seal structure of this marine centrifugal pump, by setting a first sealing ring and a second sealing ring, ensures that the connector fits tightly with the first sealing ring when connected to the protective cover, and the T-shaped limiting ring also fits with the second sealing ring during the fitting process, thereby further enhancing the sealing performance inside the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0015] Figure 2 This is a first-view sectional view of the internal structure proposed in this utility model.

[0016] Figure 3 The present utility model proposes Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 The present utility model proposes Figure 2 Enlarged view at point B in the middle;

[0018] Figure 5This is a second perspective view of the internal structure proposed in this utility model.

[0019] Figure 6 The present utility model proposes Figure 5 Enlarged view of point C in the middle.

[0020] Legend:

[0021] 1. Pump body; 2. Base; 3. Inlet; 4. Outlet; 5. Pump cover; 6. Limit screw; 7. Protective cover; 8. Connector; 9. Motor; 10. Connecting shaft; 11. Mounting block; 12. Mounting groove; 13. Fixing column; 14. Fixing block; 15. Compression spring; 16. Locking block; 17. Fixing ring; 18. Locking groove; 19. First annular groove; 20. First sealing ring; 21. T-shaped limit ring; 22. Connecting ring; 23. Second annular groove; 24. Second sealing ring; 25. Pump shaft; 26. Limiting groove; 27. Limiting column; 28. Connecting flange; 29. ​​First bearing; 30. Second bearing. 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] Reference Figure 1-6This utility model provides a water-cooled rotary control shaft seal structure for a marine centrifugal pump: It includes a pump body 1, with an inlet 3 and an outlet 4 on the outside of the pump body 1. A pump cover 5 is installed on the side end face of the pump body 1. A limiting screw 6 is movably connected inside the pump cover 5, and the pump cover 5 is fixedly connected to the pump body 1 via the limiting screw 6. A protective cover 7 is fixedly connected to the side surface of the pump cover 5. A connector 8 is movably connected inside the protective cover 7. A fixing ring 17 is fixedly connected to the circumferential surface of the protective cover 7, and a groove is formed on the inner side wall of the fixing ring 17. 18. A mounting block 11 is fixedly connected to the circumferential surface of the connector 8. A mounting groove 12 is formed at the end of the mounting block 11 away from the connector 8. A fixing post 13 is fixedly connected to the inner wall of the mounting groove 12. A compression spring 15 is sleeved on the outside of the fixing post 13. A fixing block 14 is fixedly connected to the inner wall of the mounting groove 12, and the end of the compression spring 15 is in contact with the side surface of the fixing block 14. A locking block 16 is slidably connected to the outside of the fixing post 13, and the end of the locking block 16 away from the compression spring 15 engages with the inside of the locking groove 18. When disassembling the connector 8, the locking blocks 16 on both sides compress the compression spring 15, moving the locking blocks 16 into the mounting groove 12. This facilitates the separation of the locking blocks 16 from the locking groove 18 inside the fixing ring 17, enabling the disassembly of the connector 8 from the protective cover 7 and improving the efficiency of disassembling the connector 8.

[0024] A second bearing 30 is fixedly connected inside the protective cover 7. A pump shaft 25 is rotatably connected inside the second bearing 30. A limiting groove 26 is formed on the side surface of the pump shaft 25. A limiting post 27 is engaged inside the limiting groove 26. A connecting shaft 10 is fixedly connected to the end of the limiting post 27. A first bearing 29 is rotatably connected to the outside of the connecting shaft 10, and the first bearing 29 is fixedly connected to the inner side wall of the connector 8. The connecting shaft 10 is engaged with the limiting groove 26 through the limiting post 27, thereby facilitating the pump shaft 25 to drive the connecting shaft 10 to rotate.

[0025] The protective cover 7 has a first annular groove 19 on its side surface. A first sealing ring 20 is installed inside the first annular groove 19, and the end of the connector 8 is tightly fitted with the side surface of the first sealing ring 20. By contacting the connector 8 with the first sealing ring 20, a seal is achieved between the connector 8 and the protective cover 7.

[0026] A T-shaped limiting ring 21 is fixedly connected to the inner wall of the protective cover 7, and a connecting ring 22 is fixedly connected to the inner wall of the connector 8. A second annular groove 23 is formed on the side surface of the connecting ring 22, and a second sealing ring 24 is installed inside the second annular groove 23. The end of the T-shaped limiting ring 21 is in contact with the side surface of the second sealing ring 24. When the connector 8 is connected to the protective cover 7, it fits tightly against the first sealing ring 20, and the T-shaped limiting ring 21 also fits against the second sealing ring 24 during the fit, thereby further enhancing the sealing performance inside the device.

[0027] The pump shaft 25, away from the protective cover 7, is fixedly connected to the output end of the motor 9, and the motor 9 and the bottom of the pump body 1 are provided with a base 2. The motor 9 drives the pump shaft 25 to rotate, thereby driving the pump body 1 to run.

[0028] Both the motor 9 and the pump body 1 are fixedly connected to each other with connecting flanges 28, and the two connecting flanges 28 are fixedly connected by connecting bolts. The motor 9 and the pump body 1 are connected by connecting flanges 28.

[0029] Working principle: When the device is in use, the motor 9 drives the pump shaft 25 inside the pump body 1 to rotate, thereby drawing water into the pump body 1 from the inlet 3 and discharging it from the outlet 4. When the pump shaft 25 rotates, it drives the connecting shaft 10 to rotate through the limiting post 27. The first bearing 29 and the second bearing 30 facilitate the rotation of the pump shaft 25 and the connecting shaft 10. When it is necessary to disassemble the connector 8, the locking blocks 16 on both sides compress the compression spring 15, moving the locking blocks 16 into the mounting groove 12. This facilitates the separation of the locking blocks 16 from the locking groove 18 inside the fixing ring 17, thereby disassembling the connector 8 from the protective cover 7. This improves the efficiency of disassembling the connector 8 and makes it easier to replace the aged first sealing ring 20 and second sealing ring 24 inside the device.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A marine centrifugal pump water-cooled rotating control shaft seal structure comprising a pump body (1), characterized in that: The pump body (1) is provided with an inlet (3) and an outlet (4) on its exterior. A pump cover (5) is installed on the side end face of the pump body (1). A limit screw (6) is movably connected inside the pump cover (5), and the pump cover (5) is fixedly connected to the pump body (1) by the limit screw (6). A protective cover (7) is fixedly connected to the side surface of the pump cover (5). A connector (8) is movably connected inside the protective cover (7). A fixing ring (17) is fixedly connected to the circumferential surface of the protective cover (7), and a slot (18) is opened on the inner side wall of the fixing ring (17). The circumferential surface of the connector (8) is fixedly connected to the connecting ring (8). A mounting block (11) is fixedly connected to the connector (8). The mounting block (11) has a mounting groove (12) at one end away from the connector (8). A fixing post (13) is fixedly connected to the inner wall of the mounting groove (12). A compression spring (15) is sleeved on the outside of the fixing post (13). A fixing block (14) is fixedly connected to the inner wall of the mounting groove (12). The end of the compression spring (15) is in contact with the side surface of the fixing block (14). A locking block (16) is slidably connected to the outside of the fixing post (13). The end of the locking block (16) away from the compression spring (15) is engaged with the inside of the locking groove (18).

2. A water-cooled rotating control shaft seal structure for a centrifugal pump for marine use according to claim 1, characterized in that: The protective cover (7) is fixedly connected to a second bearing (30), and the pump shaft (25) is rotatably connected inside the second bearing (30). A limiting groove (26) is opened on the side surface of the pump shaft (25). A limiting post (27) is engaged inside the limiting groove (26). A connecting shaft (10) is fixedly connected to the end of the limiting post (27). A first bearing (29) is rotatably connected to the outside of the connecting shaft (10), and the first bearing (29) is fixedly connected to the inner wall of the connector (8).

3. A water-cooled rotating control shaft seal structure for a centrifugal pump for marine use according to claim 2, characterized in that: The protective cover (7) has a first annular groove (19) on its side surface. A first sealing ring (20) is installed inside the first annular groove (19), and the end of the connector (8) is tightly fitted to the side surface of the first sealing ring (20).

4. A water-cooled rotating control shaft seal structure for a centrifugal pump for marine use according to claim 3, characterized in that: The inner wall of the protective cover (7) is fixedly connected to a T-shaped limiting ring (21), and the inner wall of the connector (8) is fixedly connected to a connecting ring (22). The side surface of the connecting ring (22) is provided with a second annular groove (23). A second sealing ring (24) is installed inside the second annular groove (23), and the end of the T-shaped limiting ring (21) is in contact with the side surface of the second sealing ring (24).

5. A water-cooled rotating control shaft seal structure for a centrifugal pump for marine use according to claim 4, characterized in that: The pump shaft (25) is fixedly connected to the output end of the motor (9) at the end away from the protective cover (7), and the motor (9) and the bottom of the pump body (1) are provided with a base (2).

6. The water-cooled rotary control shaft seal structure for a marine centrifugal pump according to claim 5, characterized in that: The motor (9) and the pump body (1) are both fixedly connected to the opposite sides by connecting flanges (28), and the two connecting flanges (28) are fixedly connected by connecting bolts.

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