Balancing drum sleeve mechanism of multi-stage pump

Abstract

The utility model discloses a multi-stage pump balancing drum sleeve mechanism, which is characterized in that a pump shaft is arranged in a shell, a balancing column is arranged at one end of a balancing drum, threaded holes are formed in the balancing drum and the balancing column in a penetrating manner, first threads are arranged on the side surface of the pump shaft, and the pump shaft is in threaded connection with the threaded holes; a balance sleeve is arranged between the shell and the balance column. When the distance between the balancing drum and the end face of the balancing sleeve needs to be adjusted, an adjusting rod needs to be twisted, the adjusting rod drives a half gear to rotate, the half gear drives a first gear to rotate, the first gear drives a cam to rotate through a first rotating shaft, a base circle of the cam is separated from an arc-shaped adjusting groove, and a flange of the cam makes contact with the arc-shaped adjusting groove. In this way, the bottom end of the rotation stopping rod is separated from the first thread, at the moment, the balance drum can rotate on the pump shaft, the distance between the balance drum and the end face of the balance sleeve is adjusted, and compared with the prior art, correction of the balance drum is more convenient, and the equipment applicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of multistage pump technology, and in particular to a multistage pump balancing drum sleeve mechanism. Background Technology

[0002] A balance drum is a device used in centrifugal pumps to balance axial forces, and is especially suitable for multistage centrifugal pumps. Its core function is to use the counterforce generated by the pressure difference to counteract the axial thrust of the rotor caused by uneven pressure before and after the impeller, thereby protecting the bearings and improving the operational stability of the equipment.

[0003] The existing balance drum and pump shaft are generally connected by a key. After the equipment has been working for a long time, the position of the balance drum is prone to shift. At this time, the equipment needs to be corrected. The existing balance drum correction requires the removal of a lot of parts, which makes the correction and maintenance inefficient and results in low applicability of the equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-stage pump balancing drum sleeve mechanism in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage pump balancing drum sleeve mechanism includes a housing and a balancing drum. A pump shaft is disposed inside the housing. A balancing column is disposed at one end of the balancing drum. Threaded holes are passed through the balancing drum and the balancing column. A first thread is disposed on the side of the pump shaft. The pump shaft and the threaded hole are threadedly connected. A balancing sleeve is disposed between the housing and the balancing column. A storage groove is opened on the side of the balancing drum. A limit hole is opened at the bottom of the storage groove. An anti-rotation rod is disposed in the limit hole. An adjustment part for controlling the position change of the anti-rotation rod is disposed in the storage groove.

[0007] Preferably, the anti-rotation rod and the limiting hole are slidably connected, and a base is provided at the bottom of the housing.

[0008] Preferably, the adjusting part includes a second limiting seat fixedly connected to the inner wall of the storage slot, a first limiting seat is provided on the side of the anti-rotation rod, a first spring is provided between the first limiting seat and the second limiting seat, and an adjusting mechanism for driving the anti-rotation rod to move is provided in the storage slot.

[0009] Preferably, a first limiting rod is provided at the bottom of the second limiting seat, the first limiting rod passes through the second limiting seat, and the first limiting rod and the first limiting seat are slidably connected.

[0010] Preferably, the adjustment mechanism includes an adjustment block disposed on the side of the anti-rotation rod, an arc-shaped adjustment groove is provided at the bottom of the adjustment block, a first rotating shaft is rotatably connected to the inner wall of the storage groove, a cam is disposed on the first rotating shaft, the cam abuts against the arc-shaped adjustment groove, and an adjustment component for controlling the rotation of the cam is disposed in the storage groove.

[0011] Preferably, the arc-shaped adjusting groove has multiple rollers evenly distributed inside, and the rollers are rotatably connected to the arc-shaped adjusting groove through a third rotating shaft.

[0012] Preferably, the adjusting component includes a second rotating shaft rotatably connected to the inner wall of the storage slot, a half gear is provided on the second rotating shaft, a first gear is provided on the first rotating shaft, the first gear and the half gear are meshed together, and an adjusting rod is provided on the side of the half gear.

[0013] Preferably, the inner wall of the storage slot is provided with a positioning plate, the positioning plate is provided with an arc-shaped plate, the arc-shaped plate is provided with an arc-shaped sliding groove, the side of the adjusting rod is provided with a transmission rod, the end of the transmission rod is provided with an adjusting ball, the adjusting ball is slidably connected with the arc-shaped sliding groove, the arc-shaped second spring is provided in the arc-shaped sliding groove, and the adjusting ball is fixedly connected with the second spring.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] When the distance between the balance drum and the end face of the balance sleeve needs to be adjusted, the adjusting rod needs to be turned. The adjusting rod drives the half gear to rotate, the half gear drives the first gear to rotate, and the first gear drives the cam to rotate through the first rotating shaft. The base circle of the cam separates from the arc-shaped adjusting groove, and the flange of the cam contacts the arc-shaped adjusting groove. In this way, the bottom end of the anti-rotation rod disengages from the first thread. At this time, the balance drum can rotate on the pump shaft to adjust the distance between it and the end face of the balance sleeve. Compared with the prior art, the calibration of the balance drum is more convenient and the applicability of the equipment is also higher. Attached Figure Description

[0016] Figure 1 A schematic diagram of the balancing drum sleeve mechanism provided according to an embodiment of the present invention is shown;

[0017] Figure 2 An exploded view of the balance drum sleeve mechanism according to an embodiment of the present invention is shown.

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the balance drum according to an embodiment of the present invention is shown;

[0019] Figure 4 A schematic diagram of the cross-sectional structure of the balance drum according to an embodiment of the present invention is shown;

[0020] Figure 5 A schematic diagram of the adjustment part structure provided according to an embodiment of the present utility model is shown;

[0021] Figure 6 A schematic diagram of the adjustment mechanism structure provided according to an embodiment of the present invention is shown;

[0022] Figure 7 A schematic diagram of the adjustment component structure provided according to an embodiment of the present invention is shown.

[0023] Legend:

[0024] 1. Housing; 2. Balancing sleeve; 3. Balancing drum; 4. Balancing column; 5. Pump shaft; 6. Storage slot; 7. Threaded hole; 8. First thread; 9. Anti-rotation rod; 10. First limiting seat; 11. Second limiting seat; 12. First limiting rod; 13. First spring; 14. Adjusting block; 15. Arc-shaped adjusting groove; 16. Third rotating shaft; 17. Roller; 18. Cam; 19. First gear; 20. First rotating shaft; 21. Positioning plate; 22. Arc-shaped plate; 23. Arc-shaped slide groove; 24. Second spring; 25. Transmission rod; 26. Adjusting rod; 27. Second rotating shaft; 28. Half gear; 29. ​​Adjusting ball; 30. Limiting hole; 31. Base. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7 This utility model provides a technical solution:

[0027] A multi-stage pump balancing drum sleeve mechanism includes a housing 1 and a balancing drum 3. A pump shaft 5 is disposed inside the housing 1. A balancing column 4 is disposed at one end of the balancing drum 3. Threaded holes 7 pass through the balancing drum 3 and the balancing column 4. A first thread 8 is provided on the side of the pump shaft 5, and the pump shaft 5 and the threaded hole 7 are threadedly connected. A balancing sleeve 2 is disposed between the housing 1 and the balancing column 4. A storage groove 6 is provided on the side of the balancing drum 3. A limit hole 30 is provided at the bottom of the storage groove 6. An anti-rotation rod 9 is disposed within the limit hole 30. An adjustment part for controlling the position change of the anti-rotation rod 9 is provided within the storage groove 6. The anti-rotation rod 9 is slidably connected to the limiting hole 30. A base 31 is provided at the bottom of the housing 1. The adjustment part includes a second limiting seat 11 fixedly connected to the inner wall of the storage groove 6. A first limiting seat 10 is provided on the side of the anti-rotation rod 9. A first limiting seat 13 is provided between the first limiting seat 10 and the second limiting seat 11. An adjustment mechanism for driving the anti-rotation rod 9 to move is provided in the storage groove 6. A first limiting rod 12 is provided at the bottom of the second limiting seat 11. The first limiting rod 12 passes through the second limiting seat 11. The first limiting rod 12 and the first limiting seat 10 are slidably connected. The adjustment mechanism includes a first limiting seat 11 provided with the anti-rotation rod 9. The adjustment block 14 on the side of the rod 9 has an arc-shaped adjustment groove 15 at its bottom. A first rotating shaft 20 is rotatably connected to the inner wall of the storage slot 6. A cam 18 is mounted on the first rotating shaft 20 and abuts against the arc-shaped adjustment groove 15. An adjustment component for controlling the rotation of the cam 18 is installed inside the storage slot 6. Multiple rollers 17 are evenly distributed inside the arc-shaped adjustment groove 15. The rollers 17 are rotatably connected to the arc-shaped adjustment groove 15 via a third rotating shaft 16. The adjustment component includes a second rotating shaft 27 rotatably connected to the inner wall of the storage slot 6. A half gear 2 is mounted on the second rotating shaft 27. 8. A first gear 19 is provided on the first rotating shaft 20. The first gear 19 and the half gear 28 are meshed and connected. An adjusting rod 26 is provided on the side of the half gear 28. A positioning plate 21 is provided on the inner wall of the storage groove 6. An arc plate 22 is provided on the positioning plate 21. An arc groove 23 is opened on the arc plate 22. A transmission rod 25 is provided on the side of the adjusting rod 26. An adjusting ball 29 is provided at the end of the transmission rod 25. The adjusting ball 29 is slidably connected to the arc groove 23. An arc-shaped second spring 24 is provided in the arc groove 23. The adjusting ball 29 is fixedly connected to the second spring 24.

[0028] Specifically, such as Figure 1 and Figure 2As shown, a pump shaft 5 is installed inside the housing 1, and a balance column 4 is installed at one end of the balance drum 3. Threaded holes 7 are passed through the balance drum 3 and the balance column 4. A first thread 8 is provided on the side of the pump shaft 5, and the pump shaft 5 and the threaded hole 7 are threadedly connected. A balance sleeve 2 is provided between the housing 1 and the balance column 4. A storage groove 6 is opened on the side of the balance drum 3. A limit hole 30 is opened at the bottom of the storage groove 6. An anti-rotation rod 9 is provided in the limit hole 30. An adjustment part for controlling the position change of the anti-rotation rod 9 is provided in the storage groove 6. The anti-rotation rod 9 and the limit hole 30 are slidably connected. A base 31 is provided at the bottom of the housing 1. The bottom of the anti-rotation rod 9 is conical and can be embedded in the first thread 8 to prevent the balance drum 3 from rotating. The balance drum 3 can be rotated to control the distance between the balance drum 3 and the balance sleeve 2, making the adjustment of the distance between the balance drum 3 and the balance sleeve 2 simple.

[0029] Specifically, such as Figure 4 and Figure 5 As shown, the adjustment part includes a second limiting seat 11 fixedly connected to the inner wall of the storage groove 6, a first limiting seat 10 provided on the side of the anti-rotation rod 9, a first spring 13 provided between the first limiting seat 10 and the second limiting seat 11, an adjustment mechanism for driving the anti-rotation rod 9 to move is provided in the storage groove 6, a first limiting rod 12 is provided at the bottom of the second limiting seat 11, the first limiting rod 12 passes through the second limiting seat 11, and the first limiting rod 12 and the first limiting seat 10 are slidably connected; under normal conditions, under the compression of the first spring 13, the tip of the anti-rotation rod 9 is embedded in the first thread 8. The function of the first spring 13 is to prevent the anti-rotation rod 9 from sliding out of the limiting hole 30, so that the tip of the anti-rotation rod 9 is disengaged from the first thread 8. The first limiting rod 12 plays the role of preventing the first limiting seat 10 and the second limiting seat 11 from being misaligned. If the first limiting seat 10 and the second limiting seat 11 are excessively misaligned, the first spring 13 may lose its function.

[0030] Specifically, such as Figure 5 and Figure 6 As shown, the adjustment mechanism includes an adjustment block 14 disposed on the side of the anti-rotation rod 9. An arc-shaped adjustment groove 15 is provided at the bottom of the adjustment block 14. A first rotating shaft 20 is rotatably connected to the inner wall of the storage groove 6. A cam 18 is disposed on the first rotating shaft 20. The cam 18 abuts against the arc-shaped adjustment groove 15. An adjustment component for controlling the rotation of the cam 18 is disposed in the storage groove 6. Multiple rollers 17 are evenly distributed inside the arc-shaped adjustment groove 15. The rollers 17 are rotatably connected to the arc-shaped adjustment groove 15 through a third rotating shaft 16. The outer side of the cam 18 is slidably connected to the arc-shaped adjustment groove 15 through the rollers 17. When the flange and base circle of the cam 18 alternately contact the arc-shaped adjustment groove 15, the bottom end of the anti-rotation rod 9 completes the action of being embedded in the first thread 8.

[0031] Specifically, such as Figure 6 and Figure 7As shown, the adjustment assembly includes a second rotating shaft 27 rotatably connected to the inner wall of the storage slot 6. A half gear 28 is provided on the second rotating shaft 27, and a first gear 19 is provided on the first rotating shaft 20. The first gear 19 and the half gear 28 are meshed together. An adjustment rod 26 is provided on the side of the half gear 28. A positioning plate 21 is provided on the inner wall of the storage slot 6. An arc-shaped plate 22 is provided on the positioning plate 21. An arc-shaped groove 23 is provided on the arc-shaped plate 22. A transmission rod 25 is provided on the side of the adjustment rod 26. An adjustment ball 29 is provided at the end of the transmission rod 25. The adjustment ball 29 is slidably connected to the arc-shaped groove 23. The radius of the half gear 28 is larger than the radius of the first gear 19. Thus, when the half gear 28 rotates by a small angle, the first gear 19 can complete a larger angle of rotation. This makes it convenient to adjust the distance at which the anti-rotation rod 9 falls into the limiting hole 30.

[0032] In summary, the multi-stage pump balancing drum sleeve mechanism provided in this embodiment requires adjusting the distance between the balancing drum 3 and the end face of the balancing sleeve 2 when adjustment is needed. The adjusting rod 26 rotates, which drives the half gear 28 to rotate. The half gear 28 drives the first gear 19 to rotate, and the first gear 19 drives the cam 18 to rotate through the first rotating shaft 20. The base circle of the cam 18 separates from the arc-shaped adjusting groove 15, and the flange of the cam 18 contacts the arc-shaped adjusting groove 15. Thus, the bottom end of the anti-rotation rod 9 disengages from the first thread 8, and the balancing drum 3 can rotate on the pump shaft 5 to adjust the distance between it and the end face of the balancing sleeve 2.

[0033] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-stage pump balancing drum sleeve mechanism, comprising a housing (1) and a balancing drum (3), wherein a pump shaft (5) is disposed inside the housing (1), characterized in that, A balance column (4) is provided at one end of the balance drum (3). A threaded hole (7) is provided through the balance drum (3) and the balance column (4). A first thread (8) is provided on the side of the pump shaft (5). The pump shaft (5) and the threaded hole (7) are threadedly connected. A balance sleeve (2) is provided between the housing (1) and the balance column (4). A storage groove (6) is provided on the side of the balance drum (3). A limit hole (30) is provided at the bottom of the storage groove (6). An anti-rotation rod (9) is provided in the limit hole (30). An adjustment part for controlling the position change of the anti-rotation rod (9) is provided in the storage groove (6).

2. The multi-stage pump balancing drum sleeve mechanism according to claim 1, characterized in that, The anti-rotation rod (9) and the limiting hole (30) are slidably connected, and a base (31) is provided at the bottom of the housing (1).

3. The multi-stage pump balancing drum sleeve mechanism according to claim 2, characterized in that, The adjustment part includes a second limiting seat (11) fixedly connected to the inner wall of the storage slot (6), a first limiting seat (10) is provided on the side of the anti-rotation rod (9), a first spring (13) is provided between the first limiting seat (10) and the second limiting seat (11), and an adjustment mechanism that drives the anti-rotation rod (9) to move is provided in the storage slot (6).

4. The multi-stage pump balancing drum sleeve mechanism according to claim 3, characterized in that, The bottom of the second limiting seat (11) is provided with a first limiting rod (12), the first limiting rod (12) passes through the second limiting seat (11), and the first limiting rod (12) and the first limiting seat (10) are slidably connected.

5. A multi-stage pump balancing drum sleeve mechanism according to claim 3, characterized in that, The adjustment mechanism includes an adjustment block (14) disposed on the side of the anti-rotation rod (9). The bottom of the adjustment block (14) is provided with an arc-shaped adjustment groove (15). The inner wall of the storage slot (6) is rotatably connected to a first rotating shaft (20). A cam (18) is disposed on the first rotating shaft (20). The cam (18) abuts against the arc-shaped adjustment groove (15). An adjustment component for controlling the rotation of the cam (18) is disposed in the storage slot (6).

6. The multi-stage pump balancing drum sleeve mechanism according to claim 5, characterized in that, The arc-shaped adjustment groove (15) has multiple rollers (17) evenly distributed inside, and the rollers (17) are rotatably connected to the arc-shaped adjustment groove (15) through a third rotating shaft (16).

7. A multi-stage pump balancing drum sleeve mechanism according to claim 5, characterized in that, The adjustment assembly includes a second rotating shaft (27) rotatably connected to the inner wall of the storage slot (6), a half gear (28) is provided on the second rotating shaft (27), a first gear (19) is provided on the first rotating shaft (20), the first gear (19) and the half gear (28) are meshed together, and an adjustment rod (26) is provided on the side of the half gear (28).

8. A multi-stage pump balancing drum sleeve mechanism according to claim 7, characterized in that, The inner wall of the storage slot (6) is provided with a positioning plate (21), the positioning plate (21) is provided with an arc plate (22), the arc plate (22) is provided with an arc groove (23), the side of the adjusting rod (26) is provided with a transmission rod (25), the end of the transmission rod (25) is provided with an adjusting ball (29), the adjusting ball (29) is slidably connected with the arc groove (23), the arc groove (23) is provided with an arc-shaped second spring (24), and the adjusting ball (29) is fixedly connected with the second spring (24).

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