Motor rotor dynamic balance detection system and method

Abstract

The invention discloses a motor rotor dynamic balance detection system and method, and relates to the field of dynamic balance detection, the motor rotor dynamic balance detection system comprises a base, one end of the upper surface of the base is fixedly provided with a first supporting arm, the upper surface of the base is slidably provided with a second supporting arm, and bearing supporting seats are arranged above the second supporting arm and the first supporting arm. According to different sizes and specifications of rotors, the second supporting arm can slide on the base, so that the distance between the first fitting plate and the second fitting plate is adjusted, and the dynamic balance detection device is suitable for dynamic balance detection of the rotors of different sizes and specifications; the first attaching plate and the second attaching plate can be completely attached to the outer surface of the rotor, a certain protection effect on the outer surface of the rotor is achieved, the attaching degree between the first attaching plate and the rotor and the attaching degree between the second attaching plate and the rotor are high, and dynamic balance detection of the rotor is not affected.

Description

Technical Field

[0001] The present invention relates to the field of dynamic balance detection, and in particular to a motor rotor dynamic balance detection system and method. Background Art

[0002] Motor rotor dynamic balancing test is a key step to ensure stable operation of the motor, and is mainly performed through a balancing machine for detection and correction.

[0003] Choosing the right balancing machine is usually the key to ensuring detection accuracy. The sensitivity, resolution, measurement range, accuracy level, speed, and sensor type of the balancing machine are all factors that need to be considered. The higher the sensitivity, the higher the balancing accuracy; the higher the resolution, the better the balancing machine performance; the measurement range should meet the maximum measurable range of the rotor; the accuracy level needs to be selected according to product requirements; the speed should be moderate, as too fast will affect the accuracy of the results; sensor types such as photoelectric encoders, magnetic powder sensors, current sensors, etc. have different detection accuracy, but existing motor rotor dynamic balancing detection is usually not flexible enough. For example, it can only detect motor rotors of a certain size. Motor rotors of different sizes require different types of motor rotor dynamic balancing detection devices for detection, which results in high detection costs.

[0004] Therefore, it is necessary to propose a motor rotor dynamic balance detection system and method to solve the above problems. Summary of the Invention

[0005] An object of the present invention is to provide a motor rotor dynamic balancing detection system and method to address the problem that existing motor rotor dynamic balancing detection is generally insufficiently flexible, such as being able to detect only motor rotors of a certain size. Motor rotors of different sizes require the use of different models of motor rotor dynamic balancing detection devices for detection, resulting in high detection costs.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a motor rotor dynamic balancing detection system, comprising a base, a first support arm is fixedly installed on one end of the upper surface of the base, a second support arm is also slidably provided on the upper surface of the base, a bearing support seat is provided above the second support arm and the first support arm, a second support shaft is rotatably provided in the bearing support seat on the first support arm, and a first support shaft is rotatably provided in the bearing support seat on the second support arm, a second bonding plate and a first bonding plate are fixedly installed on ends of the first support shaft and the second support shaft close to each other, a rotor is clamped between the second bonding plate and the first bonding plate, a middle portion of the first support shaft moves through the second bonding plate, a middle portion of the second support shaft moves through the first bonding plate, and a middle portion of the rotor is fixed by pressing the second support shaft and the end portion of the first support shaft;

[0007] A dynamic balance detector is installed on the bearing support seat, and the dynamic balance detector faces the side of the rotor.

[0008] Preferably, a motor seat is provided on the side of the second support arm away from the first support arm, the motor seat is slidably set on the base, a motor is fixedly installed on the motor seat, a first transmission wheel is fixedly installed on the end of the first support shaft away from the second support shaft, a second transmission wheel is fixedly installed on the rotating shaft of the motor, and the first transmission wheel and the second transmission wheel are connected by a transmission belt.

[0009] Preferably, a tensioning pulley is provided on the motor base, and there are multiple tensioning pulleys, which are used together to tension the transmission belt.

[0010] Preferably, an adjustment slot is provided on the motor seat, and the tensioning wheel is movably arranged in the adjustment slot;

[0011] The motor seat is also provided with a locking screw, which is used to lock the position of the tensioning wheel.

[0012] Preferably, the first bonding plate and the second bonding plate are both made of rubber material, are in the form of thin sheets, and are bonded to the outer surface of the rotor.

[0013] Preferably, the dynamic balance detector includes a photoelectric encoder and a laser rangefinder.

[0014] Preferably, support blocks are fixedly provided on the sides of the first support arm and the second support arm, and detection rods are connected to the support blocks through threaded fitting, and the ends of the two detection rods are respectively close to the sides of the first bonding plate and the second bonding plate that are away from each other.

[0015] Preferably, the end of the detection rod is kept at a distance of 0.1-10 mm from the surfaces of the corresponding first bonding plate and the second bonding plate.

[0016] Preferably, a hand-held rod is installed at the other end of the detection rod.

[0017] The present invention also discloses a method for detecting the dynamic balance of a motor rotor, comprising a motor rotor dynamic balance detection system, and further comprising the following steps:

[0018] Step 1: Clamp the rotor between the first laminating plate and the second laminating plate, and press the middle of the rotor into position by the second supporting shaft and the end of the detection rod;

[0019] Step 2: Start the motor, which drives the first support shaft to rotate through the transmission belt. When the first support shaft rotates, the second support shaft, the first laminating plate, the rotor, and the second laminating plate rotate synchronously. The motor is controlled to operate at rated power so that the rotor rotates at a stable speed.

[0020] Step 3: When the rotor speed is stable, use a dynamic balance detector to detect the distance between the first bonding plate or the second bonding plate and the dynamic balance detector. Connect the output end of the dynamic balance detector to a computer, send the length data detected by the dynamic balance detector in real time to the computer, create a curve graph of the length data on the computer, and determine whether the rotor dynamic balance meets the requirements based on the changes in the curve graph.

[0021] Specifically, when the curve is a straight line, it proves that the length data detected in real time by the dynamic balance detector are equal and the rotor dynamic balance is qualified;

[0022] When there are curves, peaks or valleys in the graph, it means that the rotor is shaking greatly during rotation, resulting in irregular changes in the detected length data, and the rotor dynamic balance is unqualified;

[0023] Step 4: Change the operating power of the motor to drive the rotor to rotate at different speeds and detect the dynamic balance of the rotor at different speeds.

[0024] The technical effects and advantages of the present invention are as follows:

[0025] 1. According to the size of the rotor, the second support arm can be slid on the base to adjust the distance between the first bonding plate and the second bonding plate, which is convenient for dynamic balancing detection of rotors of different sizes;

[0026] 2. The first and second laminating plates can be completely attached to the outer surface of the rotor, providing a certain degree of protection for the outer surface of the rotor. The first and second laminating plates have a high degree of adhesion to the rotor, which does not affect the dynamic balance detection of the rotor.

[0027] 3. When the rotor experiences severe centrifugal force during rotation, the first or second laminating plate on the side of the rotor will contact the detection rod, generating a friction sound, which can clearly indicate that the dynamic balancing performance of the rotor does not meet the requirements. The first and second laminating plates can provide a certain degree of protection between the rotor and the detection rod.

[0028] 4. When the rotor speed is stable, use a dynamic balance detector to detect the length of the first bonding plate or the second bonding plate from the dynamic balance detector, connect the output end of the dynamic balance detector to a computer, send the length data detected by the dynamic balance detector in real time to the computer, make a curve graph of the length data on the computer, and determine whether the rotor dynamic balance meets the requirements based on the changes in the curve graph. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the motor rotor dynamic balance detection system of the present invention from the first perspective.

[0030] Figure 22 is a schematic structural diagram of the motor rotor dynamic balance detection system according to the present invention from a second perspective.

[0031] Figure 3 3. This is a schematic structural diagram of the motor rotor dynamic balance detection system according to the present invention from a third perspective.

[0032] In the figure: 1. base; 2. first support arm; 3. first bonding plate; 4. rotor; 5. second bonding plate; 6. dynamic balance detector; 7. bearing support seat; 8. first support shaft; 9. first transmission wheel; 10. detection rod; 11. transmission belt; 12. motor; 13. motor seat; 14. adjustment slot; 15. locking screw; 16. second support arm; 17. second support shaft; 18. support block; 19. hand-held rod; 20. tensioning pulley; 21. ferrule. DETAILED DESCRIPTION

[0033] The present invention provides Figure 1-Figure 3 The motor rotor dynamic balancing detection system shown includes a base 1, a first support arm 2 is fixedly installed on one end of the upper surface of the base 1, and a second support arm 16 is also slidably provided on the upper surface of the base 1, and a bearing support seat 7 is provided above the second support arm 16 and the first support arm 2, a second support shaft 17 is rotatably provided in the bearing support seat 7 on the first support arm 2, and a first support shaft 8 is rotatably provided in the bearing support seat 7 on the second support arm 16, and a second bonding plate 5 and a first bonding plate 3 are fixedly installed on the ends of the first support shaft 8 and the second support shaft 17 close to each other, respectively, and the rotor 4 is clamped between the second bonding plate 5 and the first bonding plate 3, the middle part of the first support shaft 8 can move through the second bonding plate 5, and the middle part of the second support shaft 17 can move through the first bonding plate 3, and the middle part of the rotor 4 is pressed and fixed by the end of the second support shaft 17 and the first support shaft 8; according to the size of the rotor 4, the second support arm 16 can be slid on the base 1 to adjust the distance between the first bonding plate 3 and the second bonding plate 5, so as to facilitate dynamic balancing detection of rotors 4 of different sizes.

[0034] It should be noted that the base 1 is provided with mechanisms such as a latch for fixing the second support arm 16 , which is a common existing technology and is mainly used for positioning the second support arm 16 , and will not be elaborated here.

[0035] A dynamic balance detector 6 is installed on the bearing support seat 7. The dynamic balance detector 6 faces the side of the rotor 4. The dynamic balance detector 6 includes a photoelectric encoder and a laser rangefinder. The dynamic balance detector 6 is mainly used to measure the distance between the second bonding plate 5 or the first bonding plate 3, so as to judge whether the centrifugal force or shaking is serious when the rotor 4 rotates. Therefore, the specific actual product of the dynamic balance detector 6 can be selected according to actual needs; similarly, a suitable detection device can also be used to detect other values ​​to judge the dynamic balance of the rotor 4.

[0036] It should be noted that the position of the dynamic balance detector 6 can be set on the side or outer ring of the rotor 4, and can be adjusted according to actual needs, which is not limited here.

[0037] Among them, a motor seat 13 is provided on the side of the second support arm 16 away from the first support arm 2, the motor seat 13 is slidably set on the base 1, and a motor 12 is fixedly installed on the motor seat 13. A first transmission wheel 9 is fixedly installed on the end of the first support shaft 8 away from the second support shaft 17, and a second transmission wheel is fixedly installed on the rotating shaft of the motor 12. The first transmission wheel 9 and the second transmission wheel are connected by a transmission belt 11; when the motor 12 is started, the first support shaft 8 can be driven to rotate by the transmission belt 11, and when the first support shaft 8 rotates, it drives the rotor 4 to rotate, thereby detecting the dynamic balance of the rotor 4.

[0038] It should be noted that the second support arm 16 and the motor base 13 are connected and fixed via a bracket provided at the bottom, which ensures that the second support arm 16 and the motor base 13 slide synchronously on the base 1 to adjust their positions.

[0039] refer to Figure 3 As shown in the figure, in the present invention, a tensioning pulley 20 is provided on the motor base 13, and a plurality of tensioning pulleys 20 are provided. The plurality of tensioning pulleys 20 are used together to tension the transmission belt 11, so as to facilitate adaptive tensioning or loosening of the transmission belt 11, thereby increasing the accuracy of detecting the dynamic balance of the rotor 4.

[0040] refer to Figures 1 to 3 As shown in the figure, an adjustment slot 14 is provided on the motor base 13, and the tensioning wheel 20 is movably provided in the adjustment slot 14; a locking screw 15 is also provided on the motor base 13, and the locking screw 15 is used to lock the position of the tensioning wheel 20; the position of the tensioning wheel 20 is convenient for adjustment and locking, which is an existing common mechanism for adjusting the tension of the belt and will not be described in detail here.

[0041] Furthermore, in the present invention, the first bonding plate 3 and the second bonding plate 5 are both made of rubber material, and the first bonding plate 3 and the second bonding plate 5 are both in the form of thin sheets. The first bonding plate 3 and the second bonding plate 5 can be completely bonded to the outer surface of the rotor 4, which plays a certain protective role on the outer surface of the rotor 4. In addition, the first bonding plate 3, the second bonding plate 5 and the rotor 4 have a high degree of bonding, which does not affect the dynamic balance detection of the rotor 4.

[0042] In the present invention, a supporting block 18 is fixedly provided on the side of the first support arm 2 and the second support arm 16, and a detection rod 10 is connected to the supporting block 18 by threaded cooperation, and the ends of the two detection rods 10 are respectively close to the sides of the first bonding plate 3 and the second bonding plate 5 that are away from each other; the ends of the detection rod 10 are kept at a distance of 0.1-10mm from the surfaces of the corresponding first bonding plate 3 and the second bonding plate 5; when the rotor 4 rotates, if the centrifugal force of the rotor 4 is severe, the first bonding plate 3 or the second bonding plate 5 on the side of the rotor 4 will contact the detection rod 10, generating a friction sound, which can clearly determine that the dynamic balancing performance of the rotor 4 does not meet the requirements; and based on the arrangement of the first bonding plate 3 and the second bonding plate 5, a certain protection can be formed between the rotor 4 and the detection rod 10.

[0043] A hand-held rod 19 is installed at the other end of the detection rod 10. By rotating the hand-held rod 19, the detection rod 10 can be rotated in the supporting block 18, so as to facilitate the adjustment of the position of the detection rod 10 and the control of the gap size between the detection rod 10 and the second bonding plate 5. At the same time, the outer surface of the detection rod 10 is provided with a scale for easy observation and adjustment.

[0044] The present invention also discloses a method for detecting the dynamic balance of a motor rotor, comprising a motor rotor dynamic balance detection system, and further comprising the following steps:

[0045] Step 1: Clamp the rotor 4 between the first laminating plate 3 and the second laminating plate 5. The middle of the rotor 4 is pressed and positioned by the second support shaft 17 and the end of the detection rod 10.

[0046] Step 2: Start the motor 12. The motor 12 drives the first support shaft 8 to rotate through the transmission belt 11. When the first support shaft 8 rotates, the second support shaft 17, the first laminating plate 3, the rotor 4 and the second laminating plate 5 rotate synchronously. The motor 12 is controlled to operate at rated power so that the rotor 4 maintains a stable speed.

[0047] Step 3: When the rotational speed of the rotor 4 is stable, the dynamic balancing detector 6 is used to detect the distance between the first laminating plate 3 or the second laminating plate 5 and the dynamic balancing detector 6. The output end of the dynamic balancing detector 6 is connected to a computer, and the length data detected in real time by the dynamic balancing detector 6 is sent to the computer. A curve graph of the length data is created on the computer, and the dynamic balancing of the rotor 4 is determined to meet the requirements based on the changes in the curve graph.

[0048] Specifically, when the curve is a straight line, it proves that the length data detected in real time by the dynamic balance detector 6 are equal, and the dynamic balance of the rotor 4 is qualified;

[0049] When there are curves, peaks or valleys in the graph, it proves that the rotor 4 has a large shaking amplitude when rotating, resulting in irregular changes in the detected length data, and the dynamic balance of the rotor 4 is unqualified;

[0050] Step 4: Change the operating power of the motor 12 to drive the rotor 4 to rotate at different speeds, and detect the dynamic balance of the rotor 4 at different speeds.

[0051] Furthermore, in the present invention, a shaft sleeve 21 is fixedly provided at one end of the first support shaft 8 and the second support shaft 17 close to each other, and the rotating shaft connected to the rotor 4 can also be connected to the shaft sleeve 21, so that the system can not only detect the rotor 4 with a rotating shaft, but also detect the rotor 4 without a rotating shaft.

[0052] For example, initially the rotor 4 with the rotating shaft is usually tested. If the dynamic balancing performance is unqualified, the rotating shaft can be removed and the rotor 4 without the rotating shaft can be tested. If it is still unqualified, there may be a problem with the winding of the rotor 4; if it is qualified, it proves that the rotating shaft is unqualified.

Claims

1. A motor rotor dynamic balancing detection system, comprising a base (1), characterized in that: A first support arm (2) is fixedly installed on one end of the upper surface of the base (1), and a second support arm (16) is also slidably provided on the upper surface of the base (1), and a bearing support seat (7) is provided above the second support arm (16) and the first support arm (2), a second support shaft (17) is rotatably provided in the bearing support seat (7) on the first support arm (2), and a first support shaft (8) is rotatably provided in the bearing support seat (7) on the second support arm (16), and a second bonding plate (5) and a first bonding plate (3) are fixedly installed on the ends of the first support shaft (8) and the second support shaft (17) close to each other, respectively, and a rotor (4) is clamped between the second bonding plate (5) and the first bonding plate (3), the middle part of the first support shaft (8) moves through the second bonding plate (5), the middle part of the second support shaft (17) moves through the first bonding plate (3), and the middle part of the rotor (4) is fixed by pressing the end parts of the second support shaft (17) and the first support shaft (8); A clamping sleeve (21) is fixedly provided at one end of the second support shaft (17) and the first support shaft (8) close to each other, and the clamping sleeve (21) is used for clamping and connecting the rotating shaft on the rotor (4); A dynamic balance detector (6) is installed on the bearing support seat (7), and the dynamic balance detector (6) faces the side of the rotor (4).

2. The motor rotor dynamic balance detection system according to claim 1, characterized in that: A motor seat (13) is provided on a side of the second support arm (16) away from the first support arm (2), the motor seat (13) is slidably provided on the base (1), a motor (12) is fixedly mounted on the motor seat (13), a first transmission wheel (9) is fixedly mounted on one end of the first support shaft (8) away from the second support shaft (17), a second transmission wheel is fixedly mounted on the rotating shaft of the motor (12), and the first transmission wheel (9) and the second transmission wheel are connected by a transmission belt (11).

3. The motor rotor dynamic balance detection system according to claim 2, characterized in that: A tensioning wheel (20) is provided on the motor seat (13), and a plurality of tensioning wheels (20) are provided. The plurality of tensioning wheels (20) are used together to tension the transmission belt (11).

4. The motor rotor dynamic balance detection system according to claim 3, characterized in that: An adjusting slot (14) is provided on the motor seat (13), and the tensioning wheel (20) is movably arranged in the adjusting slot (14); The motor seat (13) is also provided with a locking screw (15), which is used to lock the position of the tensioning wheel (20).

5. The motor rotor dynamic balance detection system according to claim 1, characterized in that: The first laminating plate (3) and the second laminating plate (5) are both made of rubber material, and are in the form of thin sheets. The first laminating plate (3) and the second laminating plate (5) are laminating to the outer surface of the rotor (4).

6. The motor rotor dynamic balance detection system according to claim 1, characterized in that: The dynamic balance detector (6) comprises a photoelectric encoder and a laser rangefinder.

7. The motor rotor dynamic balance detection system according to claim 1, characterized in that: A support block (18) is fixedly provided on the side of each of the first support arm (2) and the second support arm (16); a detection rod (10) is connected to the support block (18) through threaded engagement; the ends of the two detection rods (10) are respectively close to the sides of the first bonding plate (3) and the second bonding plate (5) that are away from each other.

8. The motor rotor dynamic balance detection system according to claim 7, characterized in that: The end of the detection rod (10) is kept at a distance of 0.1-10 mm from the surface of the corresponding first laminating plate (3) and the second laminating plate (5).

9. The motor rotor dynamic balance detection system according to claim 7, characterized in that: The other end of the detection rod (10) is provided with a hand-held rod (19).

10. A method for detecting dynamic balance of a motor rotor, characterized in that: The motor rotor dynamic balance detection system according to any one of claims 1 to 9 further comprises the following steps: Step 1: The rotor (4) is clamped between the first laminating plate (3) and the second laminating plate (5), and the middle of the rotor (4) is pressed and positioned by the second support shaft (17) and the end of the detection rod (10); Step 2: Start the motor (12), the motor (12) drives the first support shaft (8) to rotate through the transmission belt (11), when the first support shaft (8) rotates, the second support shaft (17), the first laminating plate (3), the rotor (4) and the second laminating plate (5) rotate synchronously, and the motor (12) is controlled to operate at a rated power so that the rotor (4) maintains a stable speed of rotation; Step 3: When the rotation speed of the rotor (4) is stable, the length of the first laminating plate (3) or the second laminating plate (5) from the dynamic balance detector (6) is detected by using the dynamic balance detector (6), the output end of the dynamic balance detector (6) is connected to a computer, the length data detected in real time by the dynamic balance detector (6) is sent to the computer, a curve graph of the length data is made on the computer, and whether the dynamic balance of the rotor (4) meets the requirements is determined based on the changes in the curve graph; Specifically, when the curve is a straight line, it proves that the length data detected in real time by the dynamic balance detector (6) are equal, and the dynamic balance of the rotor (4) is qualified; When a curve, a peak or a trough appears in the curve graph, it indicates that the rotor (4) has a large shaking amplitude when rotating, resulting in irregular changes in the detected length data, and the dynamic balance of the rotor (4) is unqualified; Step 4: changing the operating power of the motor (12) to drive the rotor (4) to rotate at different speeds, and detecting the dynamic balance of the rotor (4) at different speeds.

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