Submersible centrifugal pump motor rotor component and dynamic balance debugging device thereof

Abstract

The invention discloses an immersed centrifugal pump motor rotor component and a dynamic balance debugging device thereof, and relates to the field of rotor dynamic balance test, the immersed centrifugal pump motor rotor component comprises a motor rotor iron core, a motor shaft, a key and a motor end ring, and further comprises two balance de-weight rings coaxially fixed on the motor shaft, the balance de-weight rings are in interference fit with the motor shaft, and the balance de-weight rings are in interference fit with the motor shaft. The two balance de-weight rings are located at the two ends of the motor end ring respectively, and the two balance de-weight rings are both made of steel. The motor end ring de-weighting method and the motor end ring de-weighting device have the effects that the area and the shape needing to be removed are difficult to control during de-weighting of the motor end ring made of an aluminum material, and non-uniform mass distribution is easily caused.

Description

Technical Field

[0001] The present application relates to the field of rotor dynamic balancing test, and in particular to a submersible centrifugal pump motor rotor component and a dynamic balancing debugging device thereof. Background Art

[0002] Dynamic balancing technology plays a vital role in modern mechanical engineering, especially in the design and manufacture of rotating equipment such as centrifugal pumps. With the continuous development of industrial technology, people have higher and higher performance requirements for centrifugal pumps. High efficiency, low vibration and low noise have become important design indicators. The dynamic balancing performance of a centrifugal pump is directly related to its operating efficiency and service life. Therefore, it is very important to ensure that the dynamic balancing of a centrifugal pump during the processing and manufacturing process meets the standard requirements.

[0003] The motor rotor components of a submersible centrifugal pump usually include the motor rotor, motor shaft, key, motor end ring and other components. The motor shaft is an important connecting part of these components, and the stability of its working state directly affects the function of the entire equipment. In the actual motor manufacturing process, the motor end ring is generally made of aluminum alloy.

[0004] In traditional dynamic balancing tests, weight is usually added or removed from the end rings at both ends of the rotor components to adjust their mass distribution and achieve the purpose of dynamic balancing, so that the unbalance tolerance of the rotating components is within the specified range. However, when removing weight from the aluminum motor end rings, the area and shape to be removed are difficult to control, and it is easy to cause uneven mass distribution, which makes the operator spend more time and energy in dynamic balancing adjustments. Summary of the invention

[0005] In order to overcome the above problems, the present application provides a submersible centrifugal pump motor rotor component and a dynamic balancing debugging device thereof.

[0006] The present application provides a submersible centrifugal pump motor rotor component and a dynamic balancing debugging device thereof, which adopts the following technical solutions: A submersible centrifugal pump motor rotor component includes a motor rotor core, a motor shaft, a key and a motor end ring, and also includes two balancing de-weighting rings coaxially fixed on the motor shaft, the balancing de-weighting rings are interference fit with the motor shaft, the two balancing de-weighting rings are respectively located at the two ends of the motor end ring, and the two balancing de-weighting rings are both made of steel.

[0007] By adopting the above technical scheme, the steel balancing deweighting ring not only has high strength and toughness, but also can effectively control the area and distribution of weight reduction during dynamic balancing debugging, thereby simplifying the dynamic balancing adjustment procedure and improving the debugging efficiency. It effectively solves the challenges faced by the aluminum motor end ring in deweighting in the prior art, and is of great significance for improving the overall performance of the centrifugal pump, reducing vibration and noise during equipment operation, and extending the service life of the equipment.

[0008] Preferably, scale lines are arranged on the end surface of the balancing deweighting ring, and the scale lines are distributed circumferentially.

[0009] By adopting the above technical solution, when de-weighting the balancing de-weighting ring, the existing dynamic balancing machine can collect and analyze data to determine the direction and quality of the balancing de-weighting ring that needs to be de-weighted. The setting of the scale line can help the staff quickly find the direction angle of the balancing de-weighting ring that needs to be de-weighted, thereby improving the debugging efficiency.

[0010] Preferably, the balancing deweighting ring is provided with a first slot, a second slot and a third slot along its thickness direction; The distance from the opening position of the first slot hole to the center of the balancing de-weighting ring is greater than the distance from the opening position of the second slot hole to the center of the balancing de-weighting ring, the distance from the opening position of the second slot hole to the center of the balancing de-weighting ring is greater than the distance from the opening position of the third slot hole to the center of the balancing de-weighting ring, and the apertures of the first slot hole, the second slot hole and the third slot hole are different; The balancing deweighting ring is detachably connected with a deweighting block in the first slot, the second slot and the third slot, and also includes a connecting component for connecting the balancing deweighting ring and the deweighting block.

[0011] By adopting the above technical solution, before dynamic balancing debugging, the weight removal blocks are all located in the corresponding first slot hole, second slot hole and third slot hole. Since the apertures of the first slot hole, second slot hole and third slot hole are different, the weights of the corresponding weight removal blocks therein are also different. These de-weighting blocks of different weights provide the staff with a variety of de-weighting possibilities for dynamic balancing debugging. If more de-weighting is required, the de-weighting blocks in the slots with larger apertures are removed. If less de-weighting is required, the de-weighting blocks in the slots with smaller apertures are removed. The detachable connection between the de-weighting blocks and the balancing de-weighting rings can conveniently add or subtract mass for adjustment.

[0012] Preferably, the first slots, the second slots and the third slots are arranged in multiple groups at equal intervals.

[0013] By adopting the above technical solution, the opening of multiple groups of first slots, second slots and third slots divides the balance deweighting ring in multiple directions, and with the assistance of scale lines, the convenience of dynamic balancing debugging is further improved.

[0014] Preferably, each group of the first slots, the second slots and the third slots are not located on the same radial straight line.

[0015] By adopting the above technical solution, the opening positions of each group of first slots, second slots and third slots are not located on the same radial straight line, that is, each group of first slots, second slots and third slots are staggered. Then, the opening of multiple groups of first slots, second slots and third slots can further divide the balancing de-weighting ring into multiple angles, provide more selectivity for the addition and subtraction mass adjustment of the balancing de-weighting ring, and further improve the efficiency of dynamic balancing debugging.

[0016] Preferably, the deduplication block is a long block, a medium block or a short block; The thickness of the long block is consistent with that of the balancing deweighting ring; The middle block is 2 / 3 of the thickness of the balancing deweighting ring; The short block is 1 / 3 of the thickness of the balancing de-weighting ring.

[0017] By adopting the above technical scheme, the de-weighting blocks are divided into long blocks, medium blocks and short blocks, providing a variety of options for adding or reducing the weight of the balancing de-weighting ring. If a certain angle of the balancing de-weighting ring needs to be reduced in weight, the long block in the corresponding slot hole is replaced with a medium block or a short block; conversely, if a certain angle of the balancing de-weighting ring needs to be increased in weight, the short block in the corresponding slot hole is replaced with a medium block or the short block is replaced with a long block to meet the requirements of adding or reducing weight, thereby improving the convenience of dynamic balancing debugging.

[0018] Preferably, the deweighting block is made of steel, aluminum or tungsten.

[0019] By adopting the above technical scheme, the weight removal blocks of different materials further subdivide the mass that needs to be increased or decreased in the balancing weight removal ring. The mass density of tungsten is greater than that of steel, and the mass density of steel is greater than that of aluminum. In the actual increase or decrease of the weight of the balancing weight removal ring, long blocks, medium blocks and short blocks made of steel, aluminum and tungsten can be arbitrarily combined, and the weight removal blocks can be directly replaced, which improves the convenience of dynamic balancing debugging.

[0020] A dynamic balancing debugging device includes a submersible centrifugal pump motor rotor component, a base, a control cabinet and a motor are installed on the base, a pulley and a coupling, the motor is connected to the coupling through the pulley, and the coupling is connected to the motor shaft; A support frame for supporting the motor shaft is also arranged on the base.

[0021] By adopting the above technical solution, the motor is started, and the motor drives the submersible centrifugal pump motor rotor component through the coupling for testing. It is rotated according to the set parameters and speed, and then the deweighting blocks on the balancing deweighting ring are increased or decreased accordingly according to the mass distribution and center of gravity offset displayed on the control cabinet screen.

[0022] Preferably, an operating platform is further provided on the base, a grinder is placed on the operating platform, and a clamp for positioning and fixing the deweighting block is detachably connected to the operating platform.

[0023] By adopting the above technical scheme, if the vibration amplitude and frequency of the rotor components of the submersible centrifugal pump motor are still not within a reasonable range after the above de-weighting block debugging, the de-weighting block can be further ground by a grinder. During operation, the de-weighting block is fixed with a clamp, and then the staff holds the de-weighting block and grinds it, which is simple and convenient to operate.

[0024] Preferably, a storage box is installed on the operating table, and a plurality of partition plates are arranged in the storage box. The partition plates are used to partition and store deweighting blocks of different sizes and materials.

[0025] By adopting the above technical solution, the combination of the storage box and the partition plate makes it easy for the staff to store the deweighting blocks of different sizes and materials in partitions, which is convenient for quick retrieval during dynamic balancing debugging.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention provides a new solution for the dynamic balancing and debugging of submersible centrifugal pumps. The steel balancing weight-removing ring not only has high strength and toughness, but also can effectively control the area and distribution of weight reduction during dynamic balancing and debugging, thereby simplifying the dynamic balancing adjustment procedure and improving the debugging efficiency. It effectively solves the challenges faced by the aluminum motor end ring in the prior art when weight reduction, and is of great significance in improving the overall performance of the centrifugal pump, reducing vibration and noise during equipment operation, and extending the service life of the equipment. 2. Before dynamic balancing, the weight removal blocks are located in the corresponding first slot, second slot and third slot. Since the apertures of the first slot, second slot and third slot are different, the weights of the corresponding weight removal blocks are also different. These weight-removing blocks with different weights provide the staff with multiple weight-removing possibilities for dynamic balancing debugging. If more weight removal is required, the weight-removing blocks in the slots with larger apertures are removed. If less weight removal is required, the weight-removing blocks in the slots with smaller apertures are removed. The detachable connection between the weight-removing blocks and the balance weight-removing rings can be conveniently added or subtracted for mass adjustment. 3. The opening positions of each group of first slots, second slots and third slots are not located on the same radial straight line, that is, each group of first slots, second slots and third slots are staggered. Then, the opening of multiple groups of first slots, second slots and third slots can further divide the balancing de-weighting ring into multiple angles, providing more selectivity for the addition and subtraction mass adjustment of the balancing de-weighting ring, and can further improve the efficiency of dynamic balancing debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic cross-sectional view of the embodiment 1 of the present application; Figure 2 This is a schematic diagram of the overall structure of the balanced de-heavy ring in Example 2 of the present application; Figure 3 This is a schematic diagram of the overall structure of the long block, the medium block and the short block in Example 2 of the present application; Figure 4 It is a front view of Example 3 of the present application; Figure 5 This is a schematic diagram of the local structure of Example 3 of the present application.

[0028] Figure numerals: 1. motor rotor core; 2. motor shaft; 3. key; 4. motor end ring; 5. balancing weight-removing ring; 6. scale line; 7. first slot; 8. second slot; 9. third slot; 10. weight-removing block; 111. bolt; 12. base; 13. control cabinet; 14. motor; 15. pulley; 16. coupling; 17. support frame; 18. operating table; 19. grinder; 20. storage box; 21. partition plate; 22. long block; 23. medium block; 24. short block; 25. clamp. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0030] The embodiment of the present application discloses a submersible centrifugal pump motor rotor component.

[0031] Example 1 Reference Figure 1 A submersible centrifugal pump motor rotor component includes a motor rotor core 1, a motor shaft 2, a key 3 and a motor end ring 4, and also includes two balancing weight-removing rings 5 ​​coaxially fixed on the motor shaft 2, and the balancing weight-removing rings 5 ​​are interference fit with the motor shaft 2. The two balancing weight-removing rings 5 ​​are respectively located at both ends of the motor end ring 4, and the two balancing weight-removing rings 5 ​​are made of steel.

[0032] The present invention provides a new solution for the dynamic balancing and debugging of centrifugal pumps. The steel balancing deweighting ring 5 not only has high strength and toughness, but also can effectively control the area and distribution of weight reduction during dynamic balancing and debugging, thereby simplifying the dynamic balancing adjustment procedure and improving the debugging efficiency. It effectively solves the challenges faced by the aluminum motor end ring 4 in the prior art when deweighting, and is of great significance for improving the overall performance of the centrifugal pump, reducing vibration and noise during equipment operation, and extending the service life of the equipment.

[0033] During the dynamic balancing test, the two balancing weight removal rings 5 ​​are synchronously tested with other workpieces, and weight is added or reduced on the balancing weight removal rings 5 ​​according to the test results, such as by adding a counterweight block or by removing part of the material.

[0034] Example 2 The difference between this embodiment 2 and embodiment 1 is that: Figure 2 , each balancing de-weighting ring 5 is provided with a first slot 7, a second slot 8 and a third slot 9 along the thickness direction thereof, and one end of the first slot 7, the second slot 8 and the third slot 9 is open and the other end is closed. The distance from the opening position of the first slot 7 to the center of the balancing de-weighting ring 5 is greater than the distance from the opening position of the second slot 8 to the center of the balancing de-weighting ring 5, the distance from the opening position of the second slot 8 to the center of the balancing de-weighting ring 5 is greater than the distance from the opening position of the third slot 9 to the center of the balancing de-weighting ring 5, and the apertures of the first slot 7, the second slot 8 and the third slot 9 are different. In Example 2 of the present application, the aperture of the first slot 7 is greater than the aperture of the second slot 8, and the aperture of the second slot 8 is greater than the aperture of the third slot 9. There are multiple groups of first slots 7, second slots 8 and third slots 9 that are equally spaced along the circumferential direction of the balancing de-weighting ring 5.

[0035] It should be emphasized that the reference Figure 2 , in Example 2 of the present application, the opening positions of each group of first slots 7, second slots 8 and third slots 9 are not located on the same radial straight line. In addition, a deweighting block 10 is detachably connected to each first slot 7, second slot 8 and third slot 9. It also includes a connecting assembly for connecting the balancing deweighting ring 5 and the deweighting block 10. Taking the first slot 7 as an example to explain the connecting assembly, the connecting assembly includes a connecting hole opened on the deweighting block 10, and the connecting hole is coaxial with the first slot 7. The connecting assembly also includes a bolt 111, which passes through the connecting hole and is threadedly connected to the balancing deweighting ring 5. The deweighting blocks 10 in the second slot 8 and the third slot 9 are connected in the same manner as described above, and will not be repeated here.

[0036] Before dynamic balancing, the weight removal blocks 10 are located in the corresponding first slot hole 7, second slot hole 8 and third slot hole 9. Since the apertures of the first slot hole 7, second slot hole 8 and third slot hole 9 are different, the weights of the corresponding weight removal blocks 10 therein are also different. These weight-removing blocks 10 with different weights provide a variety of weight-removing possibilities for the staff in dynamic balancing debugging. If more weight removal is required, the weight-removing blocks 10 in the slots with larger apertures are removed. If less weight removal is required, the weight-removing blocks 10 in the slots with smaller apertures are removed. The detachable connection between the weight-removing blocks 10 and the balance weight-removing ring 5 can be conveniently added or subtracted for mass adjustment. The opening positions of each group of first slot holes 7, second slot holes 8 and third slot holes 9 are not located on the same radial straight line, that is, each group of first slot holes 7, second slot holes 8 and third slot holes 9 are staggered. Then, the opening of multiple groups of first slot holes 7, second slot holes 8 and third slot holes 9 can further divide the balancing de-weighting ring 5 into multiple angles, provide more selectivity for the addition and subtraction mass adjustment of the balancing de-weighting ring 5, and can further improve the efficiency of dynamic balancing debugging.

[0037] Reference Figure 2 In addition, in order to facilitate the staff to quickly find the de-weighting orientation of the balancing de-weighting ring 5 according to the calculation results, each balancing de-weighting ring 5 is provided with scale lines 6 along its circumferential direction.

[0038] The following is a detailed description of the deduplication block 10: Reference Figure 3 In the embodiment 2 of the present application, the de-weighting block 10 has three lengths and three materials to choose from. According to the length direction, it is divided into a long block 22, a medium block 23 and a short block 24; according to the material direction, the de-weighting block 10 is made of steel, aluminum and tungsten.

[0039] The long block 22 has the same thickness as the balancing weight removal ring 5, the middle block 23 has 2 / 3 the thickness of the balancing weight removal ring 5, and the short block 24 has 1 / 3 the thickness of the balancing weight removal ring 5. In other feasible embodiments, other length classification standards can be selected.

[0040] The de-weighting block 10 is divided into a long block 22, a middle block 23 and a short block 24, providing a variety of options for adding or subtracting weight from the balancing de-weighting ring 5. If a certain angle of the balancing de-weighting ring 5 needs to be reduced in weight, the long block 22 in the corresponding slot hole is replaced with a middle block 23 or a short block 24; conversely, if a certain angle of the balancing de-weighting ring 5 needs to be increased in weight, the short block 24 in the corresponding slot hole is replaced with a middle block 23 or the short block 24 is replaced with a long block 22, so as to meet the requirements of adding or subtracting weight and improve the convenience of dynamic balancing debugging.

[0041] The de-weighting blocks 10 made of different materials further subdivide the mass that needs to be increased or decreased in the balancing de-weighting ring 5. The mass density of tungsten is greater than that of steel, and the mass density of steel is greater than that of aluminum. In the actual increase or decrease of the weight of the balancing de-weighting ring 5, the long blocks 22, medium blocks 23 and short blocks 24 made of steel, aluminum and tungsten can be arbitrarily combined, and the de-weighting blocks 10 can be directly replaced, which further improves the convenience of dynamic balancing debugging.

[0042] The implementation principle of a submersible centrifugal pump motor rotor component in Example 2 of the present application is as follows: by arbitrarily combining deweighting blocks 10 of different lengths and materials such as long blocks 22, medium blocks 23 and short blocks 24 made of steel, aluminum and tungsten, the weight of the balancing deweighting blocks 10 can be increased or decreased, thereby improving the convenience of dynamic balancing debugging.

[0043] Example 3 Different from the first and second embodiments, the third embodiment of the present application relates to a dynamic balancing debugging device, referring to Figure 4 , and further includes a base 12, on which a control cabinet 13 and a motor 14 are mounted, and further includes a pulley 15 and a coupling 16, wherein the motor 14 is connected to the coupling 16 via the pulley 15, and the coupling 16 is connected to the motor shaft 2, and a support frame 17 for supporting the motor shaft 2 is further provided on the base 12. The above structure is prior art and will not be described in detail here.

[0044] In addition, refer to Figure 4 and Figure 5 The dynamic balancing debugging device also includes an operating platform 18 fixedly connected to the base 12, and a grinder 19 is placed on the operating platform 18, and the grinder 19 is a small handheld grinder 19. The operating platform 18 is detachably connected with a clamp 25 for positioning and fixing the de-weighting block 10. Specifically, the clamp 25 is threadedly connected to the operating platform 18. If the clamp 25 is the de-weighting block 10 corresponding to the third slot 9, the de-weighting block 10 is vertically installed on the clamp 25, and the grinder 19 grinds and removes the weight from above; if it is necessary to grind the de-weighting block 10 in the first slot 7 or the second slot 8, the original clamp 25 is unscrewed and replaced with the clamp 25 corresponding to the first slot 7 or the second slot 8 for operation.

[0045] Reference Figure 5 A storage box 20 is installed on the operating table 18, and a plurality of partition plates 21 are arranged in the storage box 20. The cooperation between the storage box 20 and the partition plates 21 makes it convenient for the staff to partition and store the deweighting blocks 10 of different sizes and materials, so as to facilitate quick retrieval during dynamic balancing debugging.

[0046] The implementation principle of a dynamic balancing debugging device in Example 3 of the present application is: during dynamic balancing debugging, if the vibration amplitude and frequency of the rotor components of the submersible centrifugal pump motor are still not within a reasonable range after the above-mentioned de-weighting block 10 debugging, the grinder 19 can be used to further grind the de-weighting block 10. During operation, the de-weighting block 10 is fixed with a clamp, and then the staff holds the de-weighting block 10 to grind it. The operation is simple and convenient.

[0047] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A submersible centrifugal pump motor rotor component, comprising a motor rotor core (1), a motor shaft (2), a key (3) and a motor end ring (4), characterized in that: It also includes two balancing de-weighting rings (5) coaxially fixed on the motor shaft (2), the balancing de-weighting rings (5) and the motor shaft (2) are interference fit, the two balancing de-weighting rings (5) are respectively located at the two ends of the motor end ring (4), and the two balancing de-weighting rings (5) are both made of steel; The end surface of the balancing deweighting ring (5) is provided with scale lines (6), and the scale lines (6) are distributed in the circumferential direction; The balancing deweighting ring (5) is respectively provided with a first slot hole (7), a second slot hole (8) and a third slot hole (9) along the thickness direction thereof; The distance from the opening position of the first slot hole (7) to the center of the balancing de-weighting ring (5) is greater than the distance from the opening position of the second slot hole (8) to the center of the balancing de-weighting ring (5), the distance from the opening position of the second slot hole (8) to the center of the balancing de-weighting ring (5) is greater than the distance from the opening position of the third slot hole (9) to the center of the balancing de-weighting ring (5), and the apertures of the first slot hole (7), the second slot hole (8) and the third slot hole (9) are different; The balancing deweighting ring (5) is detachably connected to a deweighting block (10) in the first slot (7), the second slot (8) and the third slot (9), and also includes a connecting component for connecting the balancing deweighting ring (5) and the deweighting block (10).

2. A submersible centrifugal pump motor rotor component according to claim 1, characterized in that: The first slot holes (7), the second slot holes (8) and the third slot holes (9) are arranged in multiple groups at equal intervals.

3. A submersible centrifugal pump motor rotor component according to claim 2, characterized in that: Each group of the first slotted holes (7), the second slotted holes (8) and the third slotted holes (9) are not located on the same radial straight line.

4. A submersible centrifugal pump motor rotor component according to claim 1, characterized in that: The deduplication block (10) is a long block (22), a medium block (23), or a short block (24); The thickness of the long block (22) is consistent with that of the balancing deweighting ring (5); The middle block (23) is 2 / 3 of the thickness of the balancing deweighting ring (5); The short block (24) is 1 / 3 of the thickness of the balancing de-weighting ring (5).

5. The submersible centrifugal pump motor rotor component according to claim 1, characterized in that: The material of the deweighting block (10) is steel, aluminum or tungsten.

6. A dynamic balancing debugging device, characterized in that: A submersible centrifugal pump motor rotor component comprising any one of claims 1 to 5, further comprising a base (12), a control cabinet (13) and a motor (14) being mounted on the base (12), further comprising a pulley (15) and a coupling (16), wherein the motor (14) is connected to the coupling (16) via the pulley (15), and the coupling (16) is connected to the motor shaft (2); A support frame (17) for supporting the motor shaft (2) is also provided on the base (12).

7. A dynamic balancing debugging device according to claim 6, characterized in that: An operating platform (18) is also provided on the base (12), a grinder (19) is placed on the operating platform (18), and a clamp (25) for positioning and fixing the deweighting block (10) is detachably connected to the operating platform (18).

8. A dynamic balancing debugging device according to claim 7, characterized in that: A storage box (20) is installed on the operating platform (18), and a plurality of partition plates (21) are arranged in the storage box (20). The partition plates (21) are used to store deweighting blocks (10) of different sizes and materials in partitions.

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