Anti-bounce motor rotor dynamic balancing device

Abstract

The application relates to a kind of anti-jump motor rotor dynamic balancing devices, it includes mounting frame and detection component, the detection component includes support block, transmission part and blocking piece, the support block is connected to the upper end of mounting frame, the upper end of the support block is equipped with limiting slot, the limiting slot is used for the horizontal placement of rotating shaft, the transmission part is connected to the upper end of mounting frame, the transmission part is used to drive rotor rotation, the slot wall of the limiting slot is equipped with guide hole, the blocking piece includes sliding rod, the sliding rod is slidably connected to the hole wall of guide hole, and the sliding rod is arranged at the upper end of rotating shaft.Rotor in the process of rotation, sliding rod is arranged above rotating shaft, prevent rotor from jumping off and separate from detection equipment, guide hole plays a guiding role to sliding rod, and avoid that sliding rod generates pressure to rotor, avoid the influence on the mass center position detection of rotor.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing equipment, and in particular to a dynamic balancing device for an anti-jump motor rotor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

[0003] Reference Figure 1 The motor mainly consists of a stator, rotor 1, housing, bearings, and fan blades 12. The rotor 1 includes windings, an iron core, and a shaft 11. When the motor is running, the windings, after being energized, are subjected to Lorentz force in the stator's magnetic field, causing the rotor 1 to rotate, and thus output torque through the shaft 11. At the same time, the fan blades 12 include multiple circumferentially spaced blades 121, which rotate synchronously with the rotor 1 to provide heat dissipation for the motor.

[0004] Due to factors such as uneven material composition, manufacturing errors, uneven deformation of rotor blades, uneven wear, or localized chipping, rotor imbalance always exists. Rotor imbalance is one of the main causes of excessive rotor vibration and noise, directly affecting engine performance and service life.

[0005] The rotor is installed on a dynamic balancing testing device to detect the position of the rotor's center of mass. Then, the rotor is installed on a machine tool, and based on the position of the rotor's center of mass, the outer circumference of the rotor is milled and some material is removed. The rotor's center of mass then moves radially away from the milling groove, thereby adjusting the position of the rotor's center of mass so that it is as close as possible to the rotor's shaft, or even coincides with it.

[0006] During the process of detecting the rotor's center of mass position, the rotor may jump off continuously while rotating, or even detach from the detection equipment, affecting the detection of the rotor's center of mass position. Summary of the Invention

[0007] To prevent the rotor from detaching from the testing equipment, this application provides a dynamic balancing device for an anti-detachment motor rotor.

[0008] This application provides a dynamic balancing device for preventing motor rotor slippage, which adopts the following technical solution:

[0009] A dynamic balancing device for an anti-jump motor rotor includes a mounting frame and a detection assembly. The detection assembly includes a support block, a transmission component, and a blocking component. The support block is connected to the upper end of the mounting frame, and a limiting groove is provided at the upper end of the support block for horizontal placement of the rotating shaft. The transmission component is connected to the upper end of the mounting frame and is used to drive the rotor to rotate. The groove wall of the limiting groove is provided with a guide hole. The blocking component includes a sliding rod that is slidably connected to the wall of the guide hole and is located at the upper end of the rotating shaft.

[0010] By adopting the above technical solution, during the rotation of the rotor, the sliding rod is located above the rotating shaft to prevent the rotor from jumping out of the detection equipment. The guide hole guides the sliding rod and avoids the sliding rod from putting pressure on the rotor, thus avoiding affecting the detection of the rotor's center of gravity position.

[0011] Preferably, the blocking member further includes a limiting plate, which is sleeved on the outer periphery of the sliding rod, and the outer diameter of the limiting plate is larger than the inner diameter of the guide hole.

[0012] By adopting the above technical solution, the limiting plate limits the sliding of the sliding rod, preventing the entire sliding rod from sliding into or slipping out of the guide hole, and facilitating the movement of the sliding rod.

[0013] Preferably, the detection component further includes a spring, one end of which is connected to a support block and the other end of which is connected to a sliding rod.

[0014] By adopting the above technical solution, when the detection rotor needs to be replaced, the spring can automatically reset the sliding rod without the need for manual sliding of the sliding rod to reset, which is convenient for operation. The spring is connected to the sliding rod, making the sliding rod less likely to be lost.

[0015] Preferably, the spring is sleeved on the outer periphery of the sliding rod.

[0016] By adopting the above technical solution, the spring is sleeved on the outer periphery of the sliding rod, the spring is evenly stressed and is not easily deformed, thus protecting the spring. When the spring drives the sliding rod to slide in the guide hole, the sliding rod is evenly stressed, reducing friction with the hole wall of the guide hole.

[0017] Preferably, the transmission component includes a mounting block, a rotating disk, and a transmission belt. The mounting block is connected to the upper end of the mounting base, the rotating disk is rotatably connected to the mounting block, and the transmission belt is sleeved on the outer periphery of the rotating disk. The transmission belt is used to drive the rotor to rotate.

[0018] By adopting the above technical solution, the transmission belt drives the rotor to rotate, and the rotation of the rotating disk can be controlled through the hole, thereby controlling the rotation of the rotor. The operation is convenient and the transmission is stable.

[0019] Preferably, the blocking member further includes a blocking rod, one end of which is connected to a sliding rod, and the other end of which is connected to a transmission belt.

[0020] By adopting the above technical solution, the transmission belt drives the blocking rod to move while driving, so that the sliding rod slides in the guide hole. There is no need to manually slide the sliding rod to block the rotating shaft, thus automatically preventing the rotor from falling off the detection equipment during the rotor rotation process.

[0021] Preferably, the blocking component further includes a slider, which is fixedly connected to the end of the blocking rod away from the sliding rod. The slider has a through hole through which the transmission belt passes.

[0022] By adopting the above technical solution, the transmission belt passes through the through hole, making it difficult for the slider to detach from the transmission belt.

[0023] Preferably, the transmission belt has a downward pressure space between the wall of the through hole and the hole.

[0024] By adopting the above technical solution, when the rotor needs to be replaced, the transmission belt can be pressed down to reduce the contact area between the transmission belt and the slider, thereby reducing the friction between the transmission belt and the slider. The spring returns to its original deformation, allowing the slider to reset and the sliding rod to reset, making it easier to replace the rotor.

[0025] Preferably, the detection component further includes a pressure sensor connected to the bottom of the limiting groove, the upper end of the pressure sensor supporting the rotor and detecting the pressure from the rotor.

[0026] By adopting the above technical solution, a pressure sensor is used to detect changes in the rotor's center of mass position, thereby completing the rotor's dynamic balance test.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. During the rotation of the rotor, the sliding rod is located above the rotating shaft to prevent the rotor from jumping out of the detection equipment. The guide hole guides the sliding rod and avoids the sliding rod from putting pressure on the rotor, thus avoiding affecting the detection of the rotor's center of gravity position.

[0029] 2. When the detection rotor needs to be replaced, the spring can automatically reset the sliding rod without the need for manual sliding of the sliding rod, which is convenient for operation. The spring is connected to the sliding rod, making the sliding rod less likely to be lost.

[0030] 3. The transmission belt drives the blocking rod to move, allowing the sliding rod to slide within the guide hole. This eliminates the need for manual sliding of the sliding rod to block the rotating shaft, thus automatically preventing the rotor from detaching from the detection equipment during rotor rotation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the rotor.

[0032] Figure 2 This is a schematic diagram of the overall structure of the anti-jump motor rotor dynamic balancing device.

[0033] Figure 3 This is a schematic diagram of the overall structure of the mounting frame, transfer assembly, detection assembly, and calibration assembly.

[0034] Figure 4 It is a schematic diagram of the overall structure of the frame, transfer assembly, detection assembly and calibration assembly.

[0035] Figure 5 This is a schematic diagram of the overall structure of the detection component.

[0036] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Rotor; 11. Shaft; 12. Fan blade; 121. Blade; 2. Frame; 21. Mounting bracket; 22. Protective cover; 221. Top plate; 222. Side plate; 3. Conveying assembly; 31. Housing; 32. Slide chute; 33. Conveying roller; 34. Conveying chain; 35. Conveying motor; 36. Support frame; 4. Transfer assembly; 41. Sliding cylinder; 42. Base; 43. Turntable; 431. Disc body; 432. Connecting column; 44. Stepper motor; 45. Synchronous belt; 46. Rotating arm; 47. 48. Clamping component; 5. Rotating block; 6. Detection component; 7. Support block; 8. Limiting groove; 9. Guide hole; 10. Transmission component; 11. Mounting block; 12. Rotating disk; 13. Large transmission disk; 24. Small transmission disk; 15. Transmission belt; 16. Blocking component; 17. Sliding rod; 18. Connecting rod; 19. Blocking rod; 20. Limiting plate; 21. Sliding block; 22. Through hole; 33. Spring; 44. Pressure sensor; 55. Position sensor; 6. Calibration component. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] Reference Figure 1 The rotor 1 includes a shaft 11, an iron core that is interference-fitted onto the shaft 11, and a winding wound on the iron core; the rotor 1 is also coaxially fixedly connected to a fan blade 12, which includes a plurality of circumferentially spaced blades 121.

[0040] Reference Figure 2 and Figure 3 This application discloses an anti-jump motor rotor dynamic balancing device, including a frame 2, a conveying assembly 3, a transfer assembly 4, a detection assembly 5, and a calibration assembly 6.

[0041] Reference Figure 2 The frame 2 includes a mounting bracket 21 and a protective cover 22. The protective cover 22 includes a top plate 221 and a side plate 222. One end of the side plate 222 is fixedly connected to the upper end of the mounting bracket 21, and the other end of the side plate 222 is fixedly connected to the top plate 221. The side plate 222 is perpendicular to the upper surface of the mounting bracket 21, and the top plate 221 is parallel to the upper surface of the mounting bracket 21.

[0042] The conveying assembly 3 includes a housing 31, a chute 32, conveying rollers 33, a conveying chain 34, and a conveying motor 35. The chute 32 is fixedly connected to the upper end of the housing 31. Two conveying rollers 33 are disposed within the chute 32, located at opposite ends of the chute 32. The conveying rollers 33 are rotatably connected to the chute wall, and their rotation axes are perpendicular to the length of the chute 32. Two conveying chains 34 are sleeved around the outer periphery of the two conveying rollers 33 and are parallel to each other. The motor housing of the conveying motor 35 is fixedly connected to the chute 32, and its motor shaft is coaxially fixedly connected to one of the conveying rollers 33. Multiple support frames 36 are connected to the outer periphery of the conveying chain 34, spaced circumferentially along the extension direction of the conveying chain 34. The upper end of each support frame 36 is used to place the rotor 1, and the conveying chain 34 is used to convey the rotor 1.

[0043] Reference Figure 3 The transfer assembly 4 includes a sliding cylinder 41, a base 42, a turntable 43, a stepper motor 44, a timing belt 45, a rotating arm 46, and a clamping component 47.

[0044] Reference Figure 4 The cylinder body of the sliding cylinder 41 is fixedly connected to the lower surface of the top plate 221, and the piston rod of the sliding cylinder 41 is fixedly connected to the upper surface of the seat 42. The sliding cylinder 41 is used to drive the seat 42 to move in the vertical direction.

[0045] Reference Figure 3 The turntable 43 includes a disc body 431 and a connecting post 432. The connecting post 432 is coaxially fixedly connected to the lower end of the disc body 431 and rotatably connected to the base 42. The motor housing of the stepper motor 44 is fixedly connected to the base 42, and the motor shaft of the stepper motor 44 is fixedly connected to a rotating block 48. A synchronous belt 45 is sleeved on the outer periphery of the rotating block 48 and the disc body 431. The lower end of the connecting post 432 passes through the base 42 and is fixedly connected to a rotating arm 46. The end of the rotating arm 46 away from the rotation axis extends horizontally. Two clamping members 47 are provided, and the two clamping members 47 are slidably connected to the lower end of the rotating arm 46 in the horizontal direction. The two clamping members 47 are driven by a cylinder to move closer and further apart. There are four sets of rotating arms 46 and two clamping members 47 connected to the lower end of the rotating arms 46, and the four rotating arms 46 are evenly spaced around the rotation axis.

[0046] Reference Figure 2 and Figure 3When the rotating arm 46 rotates to directly above the support frame 36, the sliding direction of the clamping member 47 on the rotating arm 46 is perpendicular to the length direction of the conveying roller 33. The sliding cylinder 41 drives the seat 42 to move down so that the clamping member 47 is located on both sides of the rotor 1. The two clamping members 47 are relatively close to each other, clamping the rotor 1. Then the stepper motor 44 drives the rotating arm 46 to rotate, transferring the rotor 1. The mounting frame 21 is arranged circumferentially around the rotation axis of the rotating arm 46, and the detection component 5, the correction component 6, and the detection component 5 are arranged in sequence, corresponding to the four rotating arms 46 one by one.

[0047] Reference Figure 5 The detection component 5 includes a support block 51, a transmission component 52, a blocking component 53, a spring 54, a pressure sensor 55, a position sensor 56, and a controller.

[0048] Reference Figure 3 and Figure 5 Two support blocks 51 are provided, both of which are fixedly connected to the upper end of the mounting frame 21. Each support block 51 has a limiting groove 511 at its upper end, which is used to accommodate the two ends of the rotating shaft 11. The limiting grooves 511 extend vertically, thereby restricting the horizontal movement of the rotating shaft 11 by utilizing their sidewalls. The transmission component 52 includes a mounting block 521, a rotating disk 522, and a transmission belt 523. Two mounting blocks 521 are fixedly connected to the upper end of the mounting frame 21, located on both sides of the rotor 1. The connection line between the two mounting blocks 521 is perpendicular to the connection line between the two support blocks 51. The rotating disk 522 includes a large transmission disk 5221 and a small transmission disk 5222. A large transmission disc 5221 is rotatably connected to a mounting block 521. Two small transmission discs 5222 are provided, each rotatably connected to another mounting block 521. A transmission belt 523 is fitted around the outer periphery of the large transmission disc 5221 and the two small transmission discs 5222, with the upper end of the transmission belt 523 being horizontal. A motor drives the rotating discs 522 to rotate. The transmission belt 523 is located below the rotor 1, and its outer periphery is used to conform to the outer surface of the rotor 1.

[0049] Reference Figure 6 The blocking component 53 includes a sliding rod 531, a connecting rod 532, a blocking rod 533, a limiting plate 534, and a slider 535. One end of the connecting rod 532 is fixedly connected to the sliding rod 531, and the other end of the connecting rod 532 is fixedly connected to one end of the blocking rod 533. The other end of the connecting rod is fixedly connected to the slider 535. The groove wall of the limiting groove 511 is provided with a guide hole 512. The sliding rod 531 is slidably connected to the inner wall of the guide hole 512. The outer diameter of the sliding rod 531 is equal to the inner diameter of the guide hole 512. The sliding direction of the sliding rod 531 is perpendicular to the rotating shaft 11, and the sliding rod 531 is located above the rotating shaft 11.

[0050] A limiting plate 534 is fixedly sleeved on the outer periphery of the sliding rod 531, and a spring 54 is sleeved on the outer periphery of the sliding rod 531. One end of the spring 54 is fixedly connected to the support block 51, and the other end of the spring 54 is fixedly connected to the limiting plate 534. When the spring 54 is not under force, the distance from the limiting plate 534 to the support block 51 is less than the distance from the slider 535 to the outer periphery of the rotor 1. The slider 535 has a through hole 5351, through which the transmission belt 523 passes, and a downward pressure space is provided between the transmission belt 523 and the wall of the through hole 5351.

[0051] Reference Figure 5 The pressure sensor 55 is connected to the bottom of the limiting groove 511. The upper end of the pressure sensor 55 is used to support the rotor 1 and to detect the pressure from the rotor 1. If the center of mass of the rotor 1 and the fan blade 12 deviates from the rotating shaft 11, the pressure of the rotor 1 on the pressure sensor 55 changes periodically. The pressure value is the minimum when the center of mass rotates directly above the rotating shaft 11, and the pressure value is the maximum when the center of mass rotates directly below the rotating shaft 11.

[0052] A position sensor 56 is mounted on the support block 51 and faces the fan blade 12. It detects the position and rotational speed of the rotor 1 by observing the blades 121. Taking a fan blade 12 with twelve blades 121 evenly spaced circumferentially as an example, when the position sensor 56 detects the passage of all twelve blades 121, the rotor 1 rotates one revolution. At the very beginning of the rotor 1's rotation, when the first blade 121 passes the position sensor 56, the position sensor 56 sends the first signal to the controller, and the controller counts to 1. Subsequently, when each blade 121 passes the position sensor 56, the position sensor 56 sends a signal to the controller. The controller increments its count by 1 for each signal received, and the count cycles from 1 to 12. Simultaneously, during the rotor 1's rotation, the pressure sensor 55 sends pressure values ​​to the controller, and the pressure values ​​correspond one-to-one with the count values, thereby calculating the position of the center of mass.

[0053] Reference Figure 3 and Figure 5 After the rotor 1 stops rotating, the controller records the count value at this time and controls the operation of the correction component 6 based on the count value. For example, when the count value is 1, the pressure value is the maximum, and when the rotor 1 stops rotating, the count value is 7. At this time, the center of mass is located directly above the rotating shaft 11. During the process of the transfer component 4 clamping the rotor 1 and moving the rotor 1 to the correction component 6, the rotor 1 only rotates 90° around the rotation axis of the rotating arm 46, that is, the circumferential position of the rotor 1 remains unchanged. Therefore, when the rotor 1 is placed on the correction component 6, the center of mass is still located directly above the rotating shaft 11 of the rotor 1. At this time, under the control of the controller, the correction component 6 mills the outer circumference of the iron core to adjust the position of the center of mass.

[0054] The correction component 6 uses a CNC milling machine with fixtures, cutting tools, etc., to mill the outer periphery of the iron core under the control of the controller, thereby adjusting the position of the centroid of the rotor 1.

[0055] Reference Figure 2 and Figure 5 The mounting frame 21 is also equipped with a detection component 5, which is used to detect the dynamic balance of the rotor 1 after milling. The transmission belt 523 drives the rotor 1 to rotate at a predetermined speed. If the maximum pressure value is less than or equal to the qualified value, the dynamic balance correction of the rotor 1 is completed. After the rotor 1 completes the dynamic balance correction, the transfer component 4 places the rotor 1 on the support frame 36 and transports it backward through the conveyor chain 34.

[0056] The implementation principle of the anti-jump motor rotor dynamic balancing device in this application embodiment is as follows: The rotor 1 is placed on the support frame 36, the clamping member 47 clamps the rotor 1, the turntable 43 rotates and drives the rotating arm 46 to move the rotor 1 and place it on the support block 51. At this time, the rotating shaft 11 is embedded in the limiting groove 511, and the driving turntable 522 rotates and drives the rotor 1 to rotate. The slider 535 is affected by friction and overcomes the elastic force of the spring 54 and moves with the transmission belt 523 until the limiting plate 534 abuts against the support block 51. At this time, the sliding rod 531 slides in the guide hole 512 to the top of the rotating shaft 11, so as to block the groove opening of the limiting groove 511, and the rotating shaft 11 cannot get out of the limiting groove 511. When the center of mass position detection is completed, the sliding air... Cylinder 41 drives rotating arm 46 to move downward until it slightly presses down on transmission belt 523, causing transmission belt 523 to move downward within the downward pressing space of slider 535. The friction between slider 535 and transmission belt 523 decreases, and the elastic force of spring 54 overcomes the friction between slider 535 and transmission belt 523 to restore deformation. Sliding rod 531 is reset, and the opening of limit groove 511 is unobstructed. At this time, clamping member 47 clamps rotor 1, and stepper motor 44 drives rotating arm 46 to rotate and transfer rotor 1 to calibration component 6 for calibration. After calibration, rotor 1 is transferred to detection component 5 for re-detection. If rotor 1 is unqualified, calibration is repeated. If rotor 1 is qualified, rotor 1 is transferred to support frame 36 for transport.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dynamic balancing device for an anti-jump motor rotor, characterized in that: The device includes a mounting frame (21) and a detection component (5). The detection component (5) includes a support block (51), a transmission component (52), and a blocking component (53). The support block (51) is connected to the upper end of the mounting frame (21). The upper end of the support block (51) is provided with a limiting groove (511). The limiting groove (511) is used for the horizontal placement of the rotating shaft (11). The transmission component (52) is connected to the upper end of the mounting frame (21). The transmission component (52) is used to drive the rotor to rotate. The groove wall of the limiting groove (511) is provided with a guide hole (512). The blocking component (53) includes a sliding rod (531). The sliding rod (531) is slidably connected to the hole wall of the guide hole (512). The sliding rod (531) is located at the upper end of the rotating shaft. The detection component (5) also includes a spring (54), one end of which is connected to the support block (51), and the other end of which is connected to the sliding rod (531). The transmission component (52) includes a mounting block (521), a rotating disk (522), and a transmission belt (523). The mounting block (521) is connected to the upper end of the mounting base. The rotating disk (522) is rotatably connected to the mounting block (521). The transmission belt (523) is sleeved on the outer periphery of the rotating disk (522). The transmission belt (523) is used to drive the rotor to rotate. The blocking member (53) also includes a blocking rod (533), one end of which is connected to a sliding rod (531), and the other end of which is connected to a transmission belt (523). The blocking member (53) also includes a slider (535), which is fixedly connected to the end of the blocking rod (533) away from the sliding rod (531). The slider (535) is provided with a through hole (5351), and the transmission belt (523) passes through the through hole (5351). A downward pressure space is provided between the transmission belt (523) and the hole wall of the through hole (5351).

2. The anti-jump motor rotor dynamic balancing device according to claim 1, characterized in that: The blocking member (53) also includes a limiting plate (534), which is sleeved on the outer periphery of the sliding rod (531), and the outer diameter of the limiting plate (534) is larger than the inner diameter of the guide hole (512).

3. The anti-jump motor rotor dynamic balancing device according to claim 1, characterized in that: The spring (54) is sleeved on the outer periphery of the sliding rod (531).

4. The anti-jump motor rotor dynamic balancing device according to claim 1, characterized in that: The detection component (5) also includes a pressure sensor (55), which is connected to the bottom of the limiting groove (511). The upper end of the pressure sensor (55) is used to support the rotor and detect the pressure from the rotor.

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