Impeller dynamic balance detection device

Abstract

A dynamic balancing testing device for impellers, belonging to the field of impeller testing technology, includes a chassis, a base, support plates, positioning components, and an impeller. The base is located at the bottom right side of the chassis. Two support plates are provided, and the two support plates are movably mounted on the base. Two sets of positioning components are provided, and the two sets of positioning components are respectively mounted on the two support plates. This utility model adopts a method of sequentially positioning the left and right ends of the impeller shaft to ensure that after the shaft is positioned, the center points of its left and right ends are on the same horizontal straight line. Furthermore, both ends of the shaft with variable diameter characteristics can be accurately centered, maintaining the impeller shaft in a stable, horizontal, and straight state. This provides strong support for the dynamic balancing rotation testing of the impeller, significantly improving the accuracy and effectiveness of the testing.

Description

Technical Field

[0001] This utility model belongs to the field of impeller testing technology, specifically relating to an impeller dynamic balancing testing device. Background Technology

[0002] The principle of impeller dynamic balancing test is to determine whether the impeller has reached a dynamic balance state by measuring the vibration and unbalanced force generated during the rotation of the impeller.

[0003] A related technology (publication number CN213364129U) discloses a processing water pump impeller balancing testing device. Support feet are fixedly provided at both ends of the top of the workbench. A balance bar is fixedly provided at the top of each of the four support feet, and the tops of the four support feet are respectively fixedly connected to the two ends of the outer wall of two balance bars. A measuring bar is in contact with the top of each of the two balance bars. This processing water pump impeller balancing testing device uses a mechanism where the inside of the water pump impeller engages with the outer wall of a first positioning ring. One end of the positioning bar is buffered at both ends of the measuring bar by a first spring. One end of each of the two positioning rods contacts one side of the two positioning bars. Moving the second positioning ring allows the positioning rods to push the positioning bars, facilitating the disassembly of the water pump impeller. This not only makes the water pump impeller measurement more accurate but also protects the water pump impeller, reduces testing costs, and improves testing efficiency.

[0004] Currently, the balancing test of water pump impellers mainly covers two methods: static balancing test and dynamic balancing test. When performing dynamic balancing tests on existing impellers, rigid supports need to be installed at both ends of the impeller. The vibration signals generated at the support locations are measured to determine if the impeller is unbalanced. However, the shafts fitted to water pump impellers often have inconsistent diameters at both ends. When using the fixed-position rigid support method, it is difficult to accurately position the two ends of the impeller shaft due to the difference in diameter. This makes it difficult to maintain a horizontal and straight impeller shaft after positioning, which adversely affects the accuracy of subsequent dynamic balancing rotation tests and reduces the reliability and effectiveness of the test results. Utility Model Content

[0005] To address the limitations of existing technologies, which struggle to accurately position the two ends of the impeller shaft due to differences in diameter, resulting in an inability to maintain a horizontal and straight impeller shaft after positioning, thus negatively impacting the accuracy of subsequent dynamic balancing rotation testing and reducing the reliability and effectiveness of the test results, this invention provides an impeller dynamic balancing testing device. This device employs a sequential positioning method for the left and right ends of the impeller shaft, ensuring that the center points of both ends are on the same horizontal line after positioning. Furthermore, it allows for precise centering of both ends of the shaft with diameter variations, maintaining a stable horizontal and straight impeller shaft. This provides strong support for impeller dynamic balancing rotation testing and significantly improves the accuracy and effectiveness of the test. The specific technical solution is as follows:

[0006] An impeller dynamic balancing testing device includes a chassis, and further includes: a base, a support plate, positioning components, and an impeller. The base is disposed at the bottom right side of the chassis. Two support plates are provided, and the two support plates are movably disposed on the base. Two sets of positioning components are provided, and the two sets of positioning components are respectively disposed on the two support plates. The left and right ends of the impeller are respectively positioned within the inner cavities of the two sets of positioning components, and the positions of the two sets of positioning components relative to the impeller are adjusted independently.

[0007] In the above technical solution, each positioning component includes: a support arm, a fixed frame, a movable frame, and a first cylinder. One end of the support arm is fixedly installed on the upper surface of the support plate; the fixed frame is fixedly installed on the other end of the support arm, and the fixed frame is perpendicular to the upper surface of the support plate; the movable frame is slidably inserted into the bottom end of the fixed frame, and the relative positioning position of the impeller is adjusted by adjusting the relative distance between the movable frame and the fixed frame; the first cylinder is installed below the support plate, and the output end of the first cylinder passes through the support plate and is connected to the lower surface of the movable frame.

[0008] In the above technical solution, each group of positioning components further includes: a first mounting base, a first rotating shaft, a first positioning wheel, a second mounting base, a second rotating shaft, and a second positioning wheel. Two first mounting bases are provided, and the two first mounting bases are symmetrically installed in the inner cavity of the movable frame. The first rotating shaft is rotatable and vertically mounted on the side wall of the first mounting base. The first positioning wheel is fixedly mounted on the first rotating shaft. The second mounting base is vertically movable and height-adjustable within the fixed frame. The second rotating shaft is rotatable and vertically mounted on the side wall of the second mounting base. The second positioning wheel is fixedly mounted on the second rotating shaft. The second positioning wheel and the two first positioning wheels form a three-point positioning structure for the impeller.

[0009] In the above technical solution, the second positioning wheel is movable within the fixed frame via a positioning assembly. The positioning assembly includes a limiting seat, a movable seat, and a positioning bolt. The limiting seat is fixedly installed on the upper surface of the fixed frame, and the limiting seat has a through cavity extending from top to bottom. The movable seat is slidably inserted into the limiting seat in the vertical direction. The positioning bolt is threaded to the limiting seat in the horizontal direction, and the end of the positioning bolt extends into the inner cavity of the limiting seat and tightly abuts against the side wall of the movable seat.

[0010] In the above technical solution, a guide component is provided between the fixed frame and the movable frame. The guide component includes a slide groove and a sliding pin. The slide groove is opened vertically on the side wall of the fixed frame. The sliding pin is fixedly installed at one end of the movable frame that is inserted into the inner cavity of the fixed frame, and the sliding pin is slidably embedded in the slide groove.

[0011] In the above technical solution, a vibration detection component is provided at the support plate on the right side. The vibration detection component includes a second cylinder and a vibration sensor. The second cylinder is installed on the lower surface of the support plate on the right side, and the output end of the second cylinder extends upward through the support plate. The second cylinder is installed at the output end of the vibration sensor.

[0012] The above technical solution also includes: a coupling and a first stepper motor, wherein the coupling is connected to the left end of the impeller; the first stepper motor is disposed at the chassis, and the output end of the first stepper motor is connected to the coupling.

[0013] In the above technical solution, the spacing between the left and right sets of support plates is adjusted by an adjustment component, which includes: a guide groove, a lead screw, a slider, and a second stepper motor. The guide groove is opened horizontally on the upper surface of the base; the lead screw is rotatably disposed in the guide groove; there are two sliders, which are symmetrical and threaded onto the lead screw, and the sliders slide along the inner cavity of the guide groove; the second stepper motor is installed on the right side of the base, and the output end of the second stepper motor is connected to the lead screw.

[0014] In the above technical solution, the lead screw is provided with external threads that are opposite in direction and symmetrical.

[0015] In the above technical solution, the slider is fixedly connected to the support plate.

[0016] The impeller dynamic balancing testing device of this utility model has the following advantages compared with the prior art:

[0017] I. Given the often discrepancy in diameter between the two ends of the impeller shaft, traditional methods struggle to achieve precise positioning of both ends, making it difficult to maintain a horizontal and straight impeller shaft after positioning. This negatively impacts the accuracy of subsequent dynamic balancing rotation testing, reducing the reliability and effectiveness of the test results. In this invention, the positioning operation is first performed on the side of the impeller shaft closest to the output end of the first stepper motor. After positioning this side, the other side of the impeller shaft away from the output end of the first stepper motor is then positioned. This sequential positioning of the left and right ends of the impeller shaft ensures that the center points of both ends are on the same horizontal line after positioning, guaranteeing a stable horizontal and straight impeller shaft. This provides a solid guarantee for subsequent dynamic balancing rotation testing, improving the accuracy and effectiveness of the testing process.

[0018] Second, in this utility model, the relative distance between the left and right sets of first positioning wheels and second positioning wheels is adjustable. With this adjustable function, it can be ensured that both ends of the impeller shaft with variable diameter feature can be accurately and effectively centered. At the same time, after positioning is completed, it can be fully guaranteed that the impeller shaft always maintains a horizontal and straight state, laying a solid foundation for the stability and accuracy of subsequent related operations.

[0019] Third, to ensure that the first and second positioning wheels can move vertically relative to each other when the relative distance between them is adjusted, this application provides a limiting and guiding function for the movement of the moving frame and the moving seat. The sliding pin and the sliding groove ensure that the first positioning wheel can move vertically relative to the second positioning wheel. Through the cooperation of the limiting seat and the moving seat, the second positioning wheel can move vertically relative to the first positioning wheel. This ensures that the first and second positioning wheels are still on the same vertical line after the relative distance is adjusted. That is, at the impeller shaft, the positioning points of the two corresponding first and second positioning wheels can remain balanced and not misaligned, thereby achieving three-point stable positioning of the impeller shaft. This positioning method provides a reliable guarantee for the stability of the impeller shaft during subsequent rotational balance testing, ensuring the accuracy and reliability of the testing process.

[0020] Fourth, in this utility model, the relative distance between the left and right sets of support plates can be flexibly adjusted, so that the device can accurately adapt to the positioning requirements of the two ends of impeller shafts of different lengths, thereby flexibly meeting the diverse needs of various types of impeller shafts in the dynamic balance testing process, and improving the versatility and practicality of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the guide groove of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the support plate of this utility model;

[0023] Figure 3 This is a schematic diagram of the main structure of the impeller of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the first positioning wheel of this utility model;

[0025] Figure 5 This is a schematic diagram of the positioning bolt of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the first mounting base of this utility model;

[0027] Figures 1 to 6 In the middle, 1. chassis, 2. base, 3. support plate, 4. support arm, 5. fixed frame, 6. moving frame, 7. first cylinder, 8. first mounting seat, 9. first rotating shaft, 10. first positioning wheel, 11. sliding pin, 12. slide groove, 13. limit seat, 14. moving seat, 15. positioning bolt, 17. second mounting seat, 18. second rotating shaft, 19. second positioning wheel, 20. second cylinder, 21. vibration sensor, 22. impeller, 23. coupling, 24. first stepper motor, 25. guide groove, 26. lead screw, 27. slider, 28. second stepper motor. Detailed Implementation

[0028] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0029] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0030] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0031] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0032] Unless otherwise stated, the term "multiple" means two or more.

[0033] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or A and B.

[0035] The following are specific implementation cases and appendices. Figures 1 to 6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0036] An impeller dynamic balancing testing device includes a housing 1, and further includes: a base 2, a support plate 3, positioning components, and an impeller 22. The base 2 is located at the bottom right side of the housing 1. Two support plates 3 are provided, and the two support plates 3 are movably mounted on the base 2. Two sets of positioning components are provided, and the two sets of positioning components are respectively mounted on the two support plates 3. The left and right ends of the impeller 22 are respectively positioned in the inner cavities of the two sets of positioning components, and the positions of the two sets of positioning components relative to the impeller 22 are individually adjustable. The relative distance between the left and right sets of first positioning wheels 10 and second positioning wheels 19 is adjustable. With this adjustable function, it can be ensured that both ends of the shaft of the impeller 22 with variable diameter characteristics can be accurately and effectively centered. At the same time, after positioning is completed, it can be fully guaranteed that the shaft of the impeller 22 always maintains a horizontal and straight state, laying a solid foundation for the stability and accuracy of subsequent related operations.

[0037] For details, please refer to the main references. Figures 4 to 6 As shown, each positioning assembly includes: a support arm 4, a fixed frame 5, a movable frame 6, and a first cylinder 7. One end of the support arm 4 is fixedly mounted on the upper surface of the support plate 3; the fixed frame 5 is fixedly mounted on the other end of the support arm 4, and the fixed frame 5 is vertically arranged relative to the upper surface of the support plate 3; the movable frame 6 is slidably inserted into the bottom end of the fixed frame 5, and the relative positioning position of the impeller 22 is adjusted by adjusting the relative distance between the movable frame 6 and the fixed frame 5; the first cylinder 7 is installed below the support plate 3, and the output end of the first cylinder 7 passes through the support plate 3 and is connected to the lower surface of the movable frame 6. By opening the first cylinder 7, the movable frame 6 is driven to move vertically, so as to adjust the relative distance between the fixed frame 5 and the movable frame 6, thereby adjusting the position of the impeller 22 shaft end on the fixed frame 5 and the fixed frame 6. The movable frame 6 is positioned at each location. Each positioning assembly includes: a first mounting base 8, a first rotating shaft 9, a first positioning wheel 10, a second mounting base 17, a second rotating shaft 18, and a second positioning wheel 19. There are two first mounting bases 8, which are symmetrically installed in the inner cavity of the movable frame 6. The first rotating shaft 9 is rotated by a bearing and is vertically installed on the side wall of the first mounting base 8. The first positioning wheel 10 is fixedly installed on the first rotating shaft 9. The second mounting base 17 is movable and height-adjustable within the fixed frame 5. The second rotating shaft 18 is rotated by a bearing and is vertically installed on the side wall of the second mounting base 17. The second positioning wheel 19 is fixedly installed on the second rotating shaft 18. The second positioning wheel 19 and the two first positioning wheels 10 form a three-point positioning structure for the impeller 22.

[0038] The end of the impeller 22 is placed in the positioning space formed by the first positioning wheel 10 and the second positioning wheel 19, so that the left end of the impeller 22 shaft is initially positioned under the support of the two first positioning wheels 10, causing the second mounting base 17, the second rotating shaft 18, and the second positioning wheel 19 to descend synchronously until the left second positioning wheel 19 abuts against the upper surface of the left end of the impeller 22. This achieves the three-point centering of the impeller 22 at the first positioning wheel 10 and the second positioning wheel 19. Using this principle, the left and right ends of the impeller 22 are gradually positioned in sequence, and the impeller 22 remains horizontal and straight after positioning.

[0039] Main references Figure 4 and Figure 5 As shown, the second positioning wheel 19 is movable within the fixed frame 5 via a positioning assembly. The positioning assembly includes a limiting seat 13, a movable seat 14, and a positioning bolt 15. The limiting seat 13 is fixedly installed on the upper surface of the fixed frame 5, and the limiting seat 13 has a through cavity extending from top to bottom. The movable seat 14 is slidably inserted into the limiting seat 13 in the vertical direction. The positioning bolt 15 is threadedly connected to the limiting seat 13 in the horizontal direction, and the end of the positioning bolt 15 extends into the inner cavity of the limiting seat 13 and tightly abuts against the side wall of the movable seat 14.

[0040] The movable seat 14 is moved downward along the limiting seat 13 so that the second mounting seat 17, the second rotating shaft 18, and the second positioning wheel 19 at the bottom of the movable seat 14 descend synchronously until the second positioning wheel 19 on the left side abuts against the upper surface of the impeller 22. The positioning bolt 15 is rotated along the thread of the side wall of the limiting seat 13, and the end of the positioning bolt 15 abuts against the side wall of the movable seat 14. Thus, by means of the threaded connection between the positioning bolt 15 and the limiting seat 13, the movable seat 14 is abutted and positioned in the inner cavity of the limiting seat 13, thereby locking the relative position of the movable seat 14 and the limiting seat 13 and ensuring that there will be no relative displacement between them. That is, the position of the second positioning wheel 19 at the bottom of the movable seat 14 is locked. At this time, the left end of the impeller 22 shaft is three-point positioned at the two first positioning wheels 10 and the second positioning wheel 19.

[0041] Main references Figure 4As shown, a guide assembly is provided between the fixed frame 5 and the movable frame 6. The guide assembly includes a slide groove 12 and a sliding pin 11. The slide groove 12 is vertically opened on the side wall of the fixed frame 5. The sliding pin 11 is fixedly installed at one end of the movable frame 6 that is inserted into the inner cavity of the fixed frame 5, and the sliding pin 11 is slidably embedded in the slide groove 12. When the movable frame 6 moves vertically, it can cause the sliding pin 11 to move along the inner cavity of the slide groove 12. Under the guidance of the sliding pin 11, it can ensure that the movable frame 6 always moves vertically relative to the fixed frame 5. This ensures that the first positioning wheel 10 and the second positioning wheel 19 after the relative distance is adjusted are still on the same vertical line. That is, at the impeller 22 shaft, the positioning points of the two first positioning wheels 10 and the second positioning wheel 19 corresponding to the position can remain balanced and not misaligned, thereby achieving three-point stable positioning of the impeller 22 shaft. This positioning method provides a reliable guarantee for the stability of the impeller 22 shaft during subsequent rotational balance testing, ensuring the accuracy and reliability of the testing process.

[0042] Main references Figures 2 to 5 As shown, a vibration detection component is provided at the right support plate 3. The vibration detection component includes a second cylinder 20 and a vibration sensor 21. The second cylinder 20 is installed on the lower surface of the right support plate 3, and the output end of the second cylinder 20 extends upward through the support plate 3. The second cylinder 20 is installed at the output end of the vibration sensor 21. By measuring the vibration signal at the right end of the impeller 22 captured by the vibration sensor 21 during rotation, the imbalance of the impeller is determined.

[0043] The device also includes a coupling 23 and a first stepper motor 24. The coupling 23 is connected to the left end of the impeller 22. The first stepper motor 24 is located in the housing 1, and its output end is connected to the coupling 23. The output end of the vibration sensor 21 is driven to contact the lower surface of the right end of the impeller 22 shaft by the open second cylinder 20. The coupling 23 enables the coaxial connection between the output end of the first stepper motor 24 and the left end of the impeller 22. The open coupling 23 drives the coupling 23 and the impeller 22 to rotate circumferentially, thereby achieving dynamic balance detection.

[0044] Main references Figure 1 and Figure 2As shown, the distance between the left and right sets of support plates 3 is adjusted by an adjustment assembly, which includes: a guide groove 25, a lead screw 26, a slider 27, and a second stepper motor 28. The guide groove 25 is horizontally opened on the upper surface of the base 2. The lead screw 26 is rotatably disposed within the guide groove 25. There are two sliders 27, which are symmetrical and threaded onto the lead screw 26. The sliders 27 slide along the inner cavity of the guide groove 25. The second stepper motor 28 is installed on the right side of the base 2, and its output end is connected to the lead screw 26. The sliders 27 are fixedly connected to the support plates 3. The lead screw 26 has symmetrical external threads in opposite directions. By turning on the second stepper motor 28, the lead screw 26 can be rotated, thereby causing the two sliders 27 symmetrically threaded onto the lead screw 26 to move symmetrically along the inner cavity of the guide groove 25, so as to adjust the distance between the left and right support plates 3 and make the distance between the two support plates 3 match the overall length of the impeller 22.

[0045] It is worth noting that the first cylinder 7 and the second cylinder 20 used in this application are commonly used self-locking cylinders on the market, whose output ends can stop at any position and be locked; the vibration sensor 21 is a commonly used vibration sensor on the market, which has mature applications in the field of impeller dynamic balance detection. By using the vibration sensor 21 to monitor and feedback the vibration of the impeller 22 shaft during rotation, the dynamic balance detection of the impeller 22 is realized. This is prior art, and the model of the vibration sensor 21 and the external controller used to process the results of the vibration sensor 21 will not be described or limited here; the first stepper motor 24 and the second stepper motor 28 are commonly used self-locking motors on the market whose output ends can be locked. When stopped, the output end can self-lock and will not rotate under external force. The first stepper motor 24 and the second stepper motor 28 are commonly used forward and reverse motors on the market. Their output ends can rotate in the forward or reverse direction according to the usage requirements, which is sufficient to meet the above usage requirements. The slider 27 is a self-locking slider 27 that can be found on the market. When it stops rotating, it can self-lock and will not rotate due to external force. The outer wall of the slider 27 is provided with symmetrical and opposite threads. It adopts a common model on the market and can realize the function of driving the two support plates 3 to adjust the relative distance. There is no limitation on its model here. There is no limitation on the model of the above existing components or too much elaboration.

[0046] The working principle of the impeller dynamic balancing detection device in this embodiment is as follows:

[0047] Positioning of both ends of impeller 22: Place the left end of impeller 22 within the positioning space formed by the first positioning wheel 10 and the second positioning wheel 19 on the left side, so that the left end of the impeller 22 shaft is initially positioned under the support of the two first positioning wheels 10. Move the left movable seat 14 downward along the limiting seat 13 so that the second mounting seat 17, the second rotating shaft 18, and the second positioning wheel 19 at the bottom of the movable seat 14 descend synchronously until the left second positioning wheel 19 abuts against the upper surface of the left end of impeller 22. Then, tighten the positioning bolt 15. Rotate along the threaded side wall of the limiting seat 13 and cause the end of the positioning bolt 15 to abut against the side wall of the movable seat 14. Thus, by means of the threaded connection between the positioning bolt 15 and the limiting seat 13, the movable seat 14 is abutted and positioned in the inner cavity of the limiting seat 13, thereby locking the relative position of the movable seat 14 and the limiting seat 13 and ensuring that there will be no relative displacement between them. That is, the position of the second positioning wheel 19 at the bottom of the movable seat 14 is locked. At this time, the left end of the impeller 22 shaft is three-point positioned at the two first positioning wheels 10 and the second positioning wheel 19.

[0048] After locking and limiting the left end of the impeller 22 shaft, the relative distance between the first positioning wheel 10 and the second positioning wheel 19 on the right side is adjusted according to the above steps: the moving frame 6 is driven to move vertically by the activated first cylinder 7. At this time, the sliding pin 11 moves along the inner cavity of the slide groove 12 to ensure that the movement of the moving frame 6 always remains in the vertical direction. The movement of the moving frame 6 causes the two sets of first positioning wheels 10 in its inner cavity to fit against the lower surface of the right end of the impeller 22 shaft to support the right end of the impeller 22 shaft. Similarly, referring to the above steps, the second positioning wheel 19 on the right side is made to fit against the upper surface of the right end of the impeller 22 shaft, so as to achieve the centering positioning of the two sets of first positioning wheels 10 and second positioning wheels 19 on the right side against the right end of the impeller 22 shaft. By adopting the method of positioning the left and right ends of the impeller 22 shaft in sequence, it is ensured that after the shaft is positioned, the center points of the left and right ends are on the same horizontal straight line.

[0049] The second cylinder 20 is activated to drive the output end of the vibration sensor 21 to contact the lower surface of the right end of the impeller 22 shaft. The output end of the first step motor 24 and the left end of the impeller 22 are coaxially connected by the coupling 23. The coupling 23 and the impeller 22 are then driven to rotate circumferentially by the activated coupling 23 to achieve dynamic balance detection. The vibration of the impeller 22 is captured by the vibration sensor 21 during the rotation. The imbalance of the impeller is judged by measuring the vibration signal at the right end of the impeller 22.

[0050] The second stepper motor 28, once activated, can drive the lead screw 26 to rotate, thereby causing the two sliders 27, which are symmetrically threaded on the lead screw 26, to move symmetrically along the inner cavity of the guide groove 25, so as to adjust the distance between the two support plates 3 on the left and right sides, so that the distance between the two support plates 3 is adapted to the overall length of the impeller 22.

[0051] This invention employs a sequential positioning method for the left and right ends of the impeller 22 shaft. This ensures that after positioning, the center points of the left and right ends of the shaft are on the same horizontal straight line. Furthermore, both ends of the shaft with variable diameter characteristics can be precisely centered, maintaining the impeller 22 shaft in a stable, horizontal state. This provides strong support for impeller dynamic balance rotation testing, significantly improving the accuracy and effectiveness of the test. Simultaneously, after adjusting the relative distance between the first positioning wheel 10 and the second positioning wheel 19, they remain on the same vertical straight line, ensuring balanced and misaligned positioning at the impeller 22 shaft. Moreover, this device can flexibly adapt to the positioning requirements of impeller 22 shafts of different lengths, fully meeting the diverse application scenarios of various impeller 22 shafts in dynamic balance testing.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for detecting dynamic balance of an impeller, comprising a cabinet (1), characterized in that: Also includes: Base (2), the base (2) is located at the bottom right side of the chassis (1); Support plate (3), two support plates (3) are provided, and the two support plates (3) are movably disposed on the base (2); The positioning components are provided in two sets, and the two sets of positioning components are respectively provided on the two support plates (3); Impeller (22), the left and right ends of the impeller (22) are respectively positioned in the inner cavity of the two sets of positioning components, and the positions of the two sets of positioning components relative to the impeller (22) are adjusted individually.

2. The impeller dynamic balancing testing device according to claim 1, characterized in that: Each group of positioning components includes: Support arm (4), one end of which is fixedly installed on the upper surface of the support plate (3); A fixing frame (5) is fixedly installed at the other end of the support arm (4), and the fixing frame (5) is set perpendicular to the upper surface of the support plate (3); The movable frame (6) is slidably inserted into the bottom end of the fixed frame (5). By adjusting the relative distance between the movable frame (6) and the fixed frame (5), the relative positioning position of the impeller (22) can be adjusted. The first cylinder (7) is installed below the support plate (3), and the output end of the first cylinder (7) passes through the support plate (3) and is connected to the lower surface of the movable frame (6).

3. The impeller dynamic balancing testing device according to claim 2, characterized in that: Each group of positioning components also includes: First mounting base (8), there are two first mounting bases (8), and the two first mounting bases (8) are symmetrically installed in the inner cavity of the movable frame (6); The first rotating shaft (9) is rotated and vertically mounted on the side wall of the first mounting base (8); The first positioning wheel (10) is fixedly installed on the first rotating shaft (9); The second mounting base (17) is movable and height-adjustable within the fixed frame (5); The second rotating shaft (18) is rotatable and vertically mounted on the side wall of the second mounting base (17); The second positioning wheel (19) is fixedly installed on the second rotating shaft (18); The second positioning wheel (19) and the two first positioning wheels (10) form a three-point positioning structure for the impeller (22).

4. The impeller dynamic balancing testing device according to claim 3, characterized in that: The second positioning wheel (19) is vertically and movable within the fixed frame (5) via a positioning assembly, the positioning assembly comprising: The limiting seat (13) is fixedly installed on the upper surface of the fixing frame (5), and the limiting seat (13) has a through cavity from top to bottom; A movable seat (14) is slidably inserted into the limiting seat (13) in the vertical direction; A positioning bolt (15) is threaded to the limiting seat (13) in the horizontal direction, and the end of the positioning bolt (15) extends into the inner cavity of the limiting seat (13) and abuts tightly against the side wall of the movable seat (14).

5. The impeller dynamic balancing testing device according to claim 2, characterized in that: A guide assembly is provided between the fixed frame (5) and the movable frame (6), the guide assembly comprising: The slide (12) is vertically formed on the side wall of the fixed frame (5); A sliding pin (11) is fixedly installed at one end of the movable frame (6) inserted into the inner cavity of the fixed frame (5), and the sliding pin (11) is slidably embedded in the groove (12).

6. The impeller dynamic balancing testing device according to claim 1, characterized in that: A vibration detection assembly is provided at the support plate (3) on the right side, the vibration detection assembly including: The second cylinder (20) is mounted on the lower surface of the support plate (3) on the right side, and the output end of the second cylinder (20) extends upward through the support plate (3). Vibration sensor (21), the second cylinder (20) is installed at the output end of the vibration sensor (21).

7. The impeller dynamic balancing testing device according to claim 1, characterized in that: Also includes: Coupling (23), which is connected to the left end of the impeller (22); The first stepper motor (24) is located at the chassis (1), and the output end of the first stepper motor (24) is connected to the coupling (23).

8. The impeller dynamic balancing testing device according to claim 1, characterized in that: The spacing between the left and right sets of support plates (3) is adjusted by an adjustment component, which includes: Guide groove (25), the guide groove (25) is opened horizontally on the upper surface of the base (2); A lead screw (26) is rotatably disposed within the guide groove (25); Slider (27), two sliders (27) are provided, and the two sliders (27) are symmetrical and threaded onto the lead screw (26). The sliders (27) slide along the inner cavity of the guide groove (25); The second stepper motor (28) is mounted on the right side of the base (2), and the output end of the second stepper motor (28) is connected to the lead screw (26).

9. The impeller dynamic balancing testing device according to claim 8, characterized in that: The lead screw (26) is provided with external threads that are opposite in direction and symmetrical.

10. The impeller dynamic balancing testing device according to claim 8, characterized in that: The slider (27) is fixedly connected to the support plate (3).

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