A double-balanced drum structure for a multi-stage centrifugal pump

Abstract

This utility model relates to the field of balancing drum technology, and in particular to a double balancing drum structure for a multi-stage centrifugal pump. It includes a drive shaft with multiple positioning grooves on its outer surface. A balancing drum is fitted onto the outer surface of the drive shaft. Four spring grooves are formed inside the balancing drum, and positioning pins are installed inside each spring groove. An inclined groove is formed on the side wall of each positioning pin, and a moving groove is formed on the inner wall of each inclined groove. A threaded groove is formed on the side wall of the balancing drum, and a moving disc is installed inside the threaded groove. A moving plate is fixedly connected to the side wall of the moving disc, and a moving pin is fixedly connected to the end of the moving plate away from the moving disc. The moving plate is located inside the moving groove, and the moving pin is located inside the inclined groove. This utility model simplifies the installation and disassembly of the balancing drum and drive shaft, improving operator efficiency.

Description

Technical Field

[0001] This utility model relates to the field of balancing drums, and in particular to a double balancing drum structure for a multi-stage centrifugal pump. Background Technology

[0002] Centrifugal pumps are widely used in industry. However, conventional single-balanced-drum multistage centrifugal pumps suffer from limited balancing accuracy and susceptibility to fluctuations in operating conditions. To overcome these shortcomings and meet higher stability and reliability requirements, double-balanced-drum multistage centrifugal pumps have been developed, aiming to improve balancing performance and operational stability.

[0003] The existing dual-balance drum structure is usually assembled with the centrifugal pump drive shaft by heating. This makes it difficult to remove the balance drum when it needs to be replaced or repaired, increasing the operator's working time and reducing work efficiency. Utility Model Content

[0004] In view of this, the present invention provides a dual-balance drum structure for a multi-stage centrifugal pump. The main technical problem to be solved is that the existing dual-balance drum structure is usually assembled with the centrifugal pump drive shaft by heating. This makes it difficult to remove the balance drum when it needs to be replaced or repaired, which increases the operator's working time and reduces work efficiency.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a multi-stage centrifugal pump with a double-balanced drum structure, including a drive shaft, a positioning groove on the outer surface of the drive shaft (multiple positioning grooves), a balance drum fitted on the outer surface of the drive shaft (two balance drums), four spring grooves inside the balance drum, a positioning pin inside the spring groove, an inclined groove on the side wall of the positioning pin, a moving groove on the inner wall of the inclined groove, a threaded groove on the side wall of the balance drum, a moving disc inside the threaded groove, a moving plate fixedly connected to the side wall of the moving disc, a moving pin fixedly connected to the end of the moving plate away from the moving disc, the moving plate being located inside the moving groove, and the moving pin being located inside the inclined groove.

[0006] By adopting the above technical solution, the installation between the balance drum and the drive shaft is simpler and the disassembly and assembly are more convenient, which helps to improve the work efficiency of operators.

[0007] As a further description of the above technical solution:

[0008] The inner surface of the threaded groove is threadedly connected to a threaded disc, and a movable disc is movably mounted on the side wall of the threaded disc.

[0009] By adopting the above technical solution, rotating the threaded disc can cause it to move to the left or right, which in turn can synchronously drive the moving disc to move to the left or right.

[0010] As a further description of the above technical solution:

[0011] The side wall of the threaded disc is fixedly connected with four rotating pins.

[0012] By adopting the above technical solution, the rotating pin makes it easier for operators to rotate the threaded disc.

[0013] As a further description of the above technical solution:

[0014] A spring is fixedly connected to the inner wall of the spring groove, and one end of the spring is fixedly connected to the side wall of the positioning pin.

[0015] By adopting the above technical solution, the spring can assist the positioning pin in moving.

[0016] As a further description of the above technical solution:

[0017] A first slider is fixedly connected to the inner surface of the balancing drum, and a second slider is fixedly connected to the inner surface of the balancing drum.

[0018] By adopting the above technical solution, the first slider and the second slider are used to facilitate the installation of the balance drum onto the drive shaft for positioning purposes.

[0019] As a further description of the above technical solution:

[0020] The outer surface of the drive shaft is provided with a mounting groove, and both the first slider and the second slider are located inside the mounting groove.

[0021] By adopting the above technical solution, the mounting groove and the first and second sliders can better install the balance drum onto the drive shaft.

[0022] By employing the above technical solution, the dual-balance drum structure of the multi-stage centrifugal pump of this utility model has at least the following beneficial effects:

[0023] Compared with existing technologies, this multi-stage centrifugal pump with a double-balanced drum structure comprises a drive shaft, positioning groove, balance drum, positioning pin, spring, inclined groove, moving plate, moving pin, threaded disc, rotating pin, first slider, second slider, and mounting groove. When the balance drum needs to be installed, the rotating pin is first moved to rotate the threaded disc, which in turn moves the threaded disc, rotating pin, moving plate, and moving pin to the right. Under the action of the inclined groove, adjacent positioning pins move away from each other, the spring contracts, and the first and second sliders align with the mounting groove. The balance drum is slid to the position where the positioning pin corresponds to the positioning groove. Then, the rotating pin is moved to rotate the threaded disc, which in turn moves the threaded disc, rotating pin, moving plate, and moving pin to the left. Under the action of the inclined groove, adjacent positioning pins move closer together, causing the positioning pins to enter the mounting groove. Inside the slot, a single balance drum is now installed. The second balance drum can be installed in the same way. When the balance drum needs to be removed, simply turn the rotating pin to rotate the threaded disc, which in turn moves the threaded disc, rotating pin, moving plate, and moving pin to the right. Under the action of the inclined groove, the adjacent positioning pins will move away from each other, causing the positioning pins to disengage from the positioning slot, allowing the balance drum to slide off the drive shaft. Compared to existing balance drums, which are usually assembled with the centrifugal pump drive shaft by heating, making it difficult to remove the balance drum when it needs to be replaced or repaired, increasing the operator's working time and reducing work efficiency, the installation of the balance drum and the drive shaft of this multi-stage centrifugal pump with dual balance drum structure is simpler and the disassembly and assembly are more convenient, which helps to improve the operator's work efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a multi-stage centrifugal pump with a double-balanced drum structure proposed in this utility model.

[0025] Figure 2 This is a cross-sectional view of the overall structure of a multi-stage centrifugal pump with a double-balanced drum structure proposed in this utility model.

[0026] Figure 3 This utility model proposes a double-balanced drum structure for a multi-stage centrifugal pump. Figure 2 Enlarged view of the structure at point A in the middle;

[0027] Figure 4 This is a structural diagram of the drive shaft of a multi-stage centrifugal pump with a double-balanced drum structure proposed in this utility model;

[0028] Figure 5 This utility model presents a structural diagram of a positioning pin for a multi-stage centrifugal pump with a double-balance drum structure.

[0029] Figure 6 This invention relates to a threaded disc structure of a multi-stage centrifugal pump with a double-balanced drum.

[0030] Legend:

[0031] 1. Drive shaft; 2. Positioning groove; 3. Balance drum; 4. Spring groove; 5. Spring; 6. Positioning pin; 7. Inclined groove; 8. Moving groove; 9. Threaded groove; 10. Moving disc; 11. Moving plate; 12. Moving pin; 13. Threaded disc; 14. Rotating pin; 15. Mounting groove; 16. First slider; 17. Second slider. Detailed Implementation

[0032] Reference Figure 1-6 This utility model provides a multi-stage centrifugal pump with a double-balanced drum structure: It includes a drive shaft 1, with multiple positioning grooves 2 on the outer surface of the drive shaft 1, and two balance drums 3 fitted onto the outer surface of the drive shaft 1. Each balance drum 3 has four spring grooves 4 inside, with positioning pins 6 inside each spring groove 4. The sidewalls of the positioning pins 6 have inclined grooves 7, and the inner walls of the inclined grooves 7 have moving grooves 8. The sidewalls of the balance drums 3 have threaded grooves 9, with a moving disc 10 inside each threaded groove 9. A moving plate 11 is fixedly connected to the sidewall of the moving disc 10, and the moving plate 11 is located away from... One end of the movable disk 10 is fixedly connected to a movable pin 12. The movable plate 11 is located inside the movable groove 8, and the movable pin 12 is located inside the inclined groove 7. When the balance drum 3 needs to be installed, first turn the rotating pin 14 to drive the threaded disk 13 to rotate, which in turn drives the threaded disk 13, the rotating pin 14, the movable plate 11, and the movable pin 12 to move to the right. Under the action of the inclined groove 7, the adjacent positioning pins 6 will move away from each other, the spring 5 will contract, and then the first slider 16 and the second slider 17 will be aligned with the mounting groove 15. The balance drum 3 will be slid to the position where the positioning pin 6 corresponds to the positioning groove 2, and then the rotating pin 14 will be turned to drive the threaded disk 13 to rotate. The movement of the screw thread 13, rotating pin 14, moving plate 11, and moving pin 12 to the left causes the adjacent positioning pins 6 to move closer together under the action of the inclined groove 7, allowing the positioning pins 6 to enter the positioning groove 2. At this point, the single balance drum 3 is installed. The second balance drum 3 can be installed in the same way. When it is necessary to remove the balance drum 3, simply rotate the rotating pin 14 to rotate the screw thread 13, which in turn causes the screw thread 13, rotating pin 14, moving plate 11, and moving pin 12 to move to the right. Under the action of the inclined groove 7, the adjacent positioning pins 6 move away from each other, allowing the positioning pins 6 to disengage from the positioning groove 2, thus removing the balance drum 3. The balance drum 3 slides down from the drive shaft 1. The inner surface of the threaded groove 9 is threaded with a threaded disc 13. A movable disc 10 is movably installed on the side wall of the threaded disc 13. Rotating the threaded disc 13 can move the threaded disc 13 to the left or right, which can then drive the movable disc 10 to move to the left or right in sync. A rotating pin 14 is fixedly connected to the side wall of the threaded disc 13. The rotating pin 14 makes it easier for the operator to rotate the threaded disc 13. There are four rotating pins 14. A spring 5 is fixedly connected to the inner wall of the spring groove 4. The spring 5 can assist the positioning pin 6 in moving. One end of the spring 5 is fixedly connected to the side wall of the positioning pin 6.

[0033] The inner surface of the balance drum 3 is fixedly connected to a first slider 16. The first slider 16 and the second slider 17 are used to facilitate the installation of the balance drum 3 onto the drive shaft 1 for positioning purposes. The inner surface of the balance drum 3 is fixedly connected to a second slider 17. The outer surface of the drive shaft 1 is provided with a mounting groove 15. The mounting groove 15 and the first slider 16 and the second slider 17 cooperate to better install the balance drum 3 onto the drive shaft 1. The first slider 16 and the second slider 17 are both located inside the mounting groove 15.

[0034] Working principle: When the balance drum 3 needs to be installed, first turn the rotating pin 14 to drive the threaded disc 13 to rotate, which in turn drives the threaded disc 13, rotating pin 14, moving plate 11 and moving pin 12 to move to the right. Under the action of the inclined groove 7, the adjacent positioning pins 6 will move away from each other, the spring 5 will contract, and then the first slider 16 and the second slider 17 will be aligned with the mounting groove 15. The balance drum 3 will be slid to the position where the positioning pin 6 corresponds to the positioning groove 2. Then turn the rotating pin 14 to drive the threaded disc 13 to rotate, which in turn drives the threaded disc 13, rotating pin 14, moving plate 11 and moving pin 12 to move to the right. Move 12 to the left. Under the action of the inclined groove 7, the adjacent positioning pins 6 will move closer to each other, so that the positioning pins 6 enter the interior of the positioning groove 2. At this time, the single balance drum 3 is installed. The second balance drum 3 can be installed in the same way. When it is necessary to remove the balance drum 3, simply turn the rotating pin 14 to drive the threaded disc 13 to rotate, which in turn drives the threaded disc 13, rotating pin 14, moving plate 11 and moving pin 12 to move to the right. Under the action of the inclined groove 7, the adjacent positioning pins 6 will move away from each other, so that the positioning pins 6 will disengage from the positioning groove 2 and the balance drum 3 can slide off the drive shaft 1.

[0035] 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 multi-stage centrifugal pump with a double-balanced drum structure, comprising a drive shaft (1), characterized in that: The outer surface of the drive shaft (1) is provided with positioning grooves (2), and there are multiple positioning grooves (2). The outer surface of the drive shaft (1) is fitted with balance drums (3), and there are two balance drums (3). The inside of the balance drums (3) is provided with four spring grooves (4). The inside of the spring grooves (4) is provided with positioning pins (6). The side wall of the positioning pins (6) is provided with inclined grooves (7). The inner wall of the inclined grooves (7) is provided with moving grooves (8). The side wall of the balance drums (3) is provided with threaded grooves (9). The inside of the threaded grooves (9) is provided with moving discs (10). The side wall of the moving discs (10) is fixedly connected with moving plates (11). The end of the moving plates (11) away from the moving discs (10) is fixedly connected with a moving pin (12). The moving plates (11) are located inside the moving grooves (8), and the moving pins (12) are located inside the inclined grooves (7).

2. The dual-balance drum structure for a multi-stage centrifugal pump according to claim 1, characterized in that: The inner surface of the threaded groove (9) is threadedly connected to a threaded disc (13), and a movable disc (10) is movably installed on the side wall of the threaded disc (13).

3. The multi-stage centrifugal pump double-balanced drum structure according to claim 2, characterized in that: The side wall of the threaded disc (13) is fixedly connected with a rotating pin (14), and the number of rotating pins (14) is four.

4. The dual-balanced drum structure of a multi-stage centrifugal pump according to claim 1, characterized in that: A spring (5) is fixedly connected to the inner wall of the spring groove (4), and one end of the spring (5) is fixedly connected to the side wall of the positioning pin (6).

5. The dual-balance drum structure for a multi-stage centrifugal pump according to claim 1, characterized in that: The inner surface of the balance drum (3) is fixedly connected to a first slider (16), and the inner surface of the balance drum (3) is fixedly connected to a second slider (17).

6. The dual-balance drum structure of a multi-stage centrifugal pump according to claim 5, characterized in that: The outer surface of the drive shaft (1) is provided with a mounting groove (15), and the first slider (16) and the second slider (17) are both located inside the mounting groove (15).

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