Motor rotor performance detection device and detection method thereof

Abstract

The application relates to a motor rotor performance detection equipment, which comprises a base, a vertical plate is fixedly connected to the top wall of the base, a supporting shaft is fixedly connected to the front wall of the vertical plate, a reciprocating bearing is sleeved on the supporting shaft, a reciprocating roller is supported by the reciprocating bearing, a T-shaped ring is fixedly connected to the front end of the reciprocating roller, the T-shaped ring is provided with a vertical plate extending downward and two transverse plates extending in opposite directions, a vertical sliding seat is slidably connected to the front wall of the vertical plate, an axle bottom sensing seat is slidably connected to the top of the vertical sliding seat, the axle bottom sensing seat is provided with two axle bottom contact wheels, and one horizontal sliding seat is slidably connected to each of the two lateral transverse plates. The detection method of the motor rotor performance detection equipment can more fully and more comprehensively analyze the vibration characteristics of the rotor, improves the dynamic balance correction precision, and avoids the risk of missing judgment due to missing detection of the vertical vibration characteristics.

Description

Technical Field

[0001] This invention relates to the field of motor testing technology, specifically to a motor rotor performance testing device and its testing method. Background Technology

[0002] Permanent magnet synchronous motors are widely used in new energy vehicles and smart home fields. The dynamic balance performance of their rotors directly affects the performance of permanent magnet synchronous motors, so the dynamic balance test of their rotors is of utmost importance.

[0003] Because gravity preloads the rotor vertically, the rotor support system is more stiff in the vertical direction than in the horizontal direction. Under the same unbalanced force, the vibration amplitude is larger in the direction with lower stiffness. Therefore, existing rotor dynamic balancing testing equipment only places sensors in the horizontal direction of the rotor to capture more significant vibration signals. However, some faults (such as bearing wear, misalignment, or looseness) can cause vibrations in multiple directions simultaneously. For example, a fault in the inner ring of a bearing may cause high-frequency impacts in both the horizontal and vertical directions. Therefore, only detecting the horizontal vibration characteristics of the rotor carries the risk of missed detections.

[0004] In addition, existing rotor dynamic balancing tests only test one section of the rotor, resulting in low testing accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a motor rotor performance testing device and its testing method, which can more fully and comprehensively analyze the vibration characteristics of the rotor, improve the accuracy of dynamic balance correction, and avoid the risk of missed judgment due to missed detection of vertical vibration characteristics.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A motor rotor performance testing device includes a base, a vertical plate fixed to the top wall of the base, a support shaft fixed to the front wall of the vertical plate, a reciprocating bearing sleeved on the support shaft, a reciprocating roller supported by the reciprocating bearing, a T-ring fixed to the front end of the reciprocating roller, the T-ring having a downwardly extending vertical plate and two transverse plates extending in opposite directions, a vertical slide block slidably connected to the front wall of the vertical plate, a shaft bottom sensing seat slidably connected to the top of the vertical slide block, the shaft bottom sensing seat having two shaft bottom contact wheels, a transverse slide block slidably connected to each of the two transverse plates, a shaft side sensing seat slidably connected to the inner side of each of the two transverse slide blocks, the shaft side sensing seat having a shaft side contact wheel, an axial adjustment plate slidably connected to the front side of the vertical plate, the axial adjustment plate having a central section... A clearance notch is provided, and a carriage bearing is installed on the front side of the clearance notch edge. The inner ring of the carriage bearing supports a carriage sleeve. The carriage sleeve is slidably fitted onto the reciprocating roller. An axially adjusting carriage is fixed to the front side of the carriage sleeve. The axially adjusting carriage has one vertical adjusting frame and two horizontal adjusting frames. The two mating frame bars of the vertical adjusting frame are inclined downwards from back to front, and the two mating frame bars of each horizontal adjusting frame are inclined outwards from back to front. Two rows of constraint wheels are provided on each of the horizontal sides of the vertical slide. The two rows of constraint wheels on the same side are in contact with the upper and lower sides of a certain mating frame bar of the vertical adjusting frame, respectively. Two rows of constraint wheels are provided on each of the upper and lower sides of the horizontal slide. The two rows of constraint wheels on the same side are in contact with the left and right sides of a certain mating frame bar of the horizontal adjusting frame, respectively.

[0008] Specifically, the support shaft is a hollow shaft, which is fixedly installed on the vertical plate. The support shaft is fitted with two reciprocating bearings, which together support the reciprocating roller.

[0009] Specifically, a guide key is fixed to the outer wall of the reciprocating roller, the inner wall of the carriage sleeve is slidably connected to the guide key, a reciprocating motor is installed in the base, and the reciprocating motor is connected to the reciprocating roller via a synchronous belt.

[0010] Specifically, the front wall of the upright plate is fixedly connected to four guide columns, which are slidably engaged with the axial adjustment plate. The upright plate is equipped with two drive screws, and the screw nuts of the drive screws are fixedly connected to the axial adjustment plate.

[0011] Specifically, the included angle between the mating frame of the vertical adjustment frame, the mating frame of the horizontal adjustment frame, and the central axis of the support shaft is 28°-32°.

[0012] Specifically, an axial slide is slidably connected to the front side of the base, and a shaft end placement seat is fixedly connected to the axial slide. The shaft end placement seat is provided with two front support rollers, and a front positioning cone is threadedly connected to the shaft end placement seat.

[0013] Specifically, an end cap is fixed to the front end of the support shaft, and a rear positioning cone is slidably inserted through the end cap. An adjusting cone motor is fixed inside the support shaft, and an adjusting sleeve is coaxially fixed to the motor shaft of the adjusting cone motor. The adjusting sleeve is threadedly connected to the rear section of the rear positioning cone.

[0014] Specifically, a rotor drive motor is installed inside the base.

[0015] The testing method for motor rotor performance testing equipment includes the following steps:

[0016] Step 1: Make the two shaft bottom contact wheels jointly support the rear shaft section of the rotor under test, make the two front support shaft rollers jointly support the front shaft section of the rotor under test, and make the front positioning cone abut against the front shaft end of the rotor under test.

[0017] Step 2: The vertical adjustment frame and the two horizontal adjustment frames move forward together, causing the two shaft bottom contact wheels to move upward a certain distance, so that the central axis of the rotor under test is horizontal. During this process, the cooperating frame bars of the two horizontal adjustment frames drive the two horizontal slides to slide inward, thereby causing the shaft side contact wheels of the two horizontal slides to move inward to abut against the horizontal sides of the rear shaft section of the rotor under test. Then, the adjusting cone motor drives the rear positioning cone to move forward to abut against the rear shaft end of the rotor under test, thereby achieving positioning. At this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the test section one of the rear shaft section of the rotor under test.

[0018] Step 3: Rotate the rotor to be tested. The bottom sensing seat is used to sense the vertical runout at a point on the cross section to be tested, and the side sensing seat is used to sense the horizontal runout at a point on the cross section to be tested.

[0019] Step 4: The adjusting cone motor drives the rear positioning cone to move backward a certain distance. Then, the reciprocating roller swings back and forth at a small angle, thereby driving the shaft side contact wheel and the shaft bottom contact wheel to roll back and forth on the circumference of the rear shaft section of the rotor under test in a small amplitude. During this process, the axial slide slowly pushes the rotor under test to move backward until the rear shaft end of the rotor under test abuts against the rear positioning cone again. At this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the test section two of the rear shaft section of the rotor under test.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] By setting two shaft bottom contact wheels 321 and two shaft side contact wheels 421 to detect the vertical and horizontal vibration characteristics of the rotor 8 under test respectively, the vibration characteristics of the rotor can be analyzed more fully and comprehensively, improving the accuracy of dynamic balance correction and avoiding the risk of missed judgment due to missed detection of vertical vibration characteristics.

[0022] The two shaft bottom contact wheels 321 and the two shaft side contact wheels 421 can be easily switched to different test sections, thereby enabling the detection of multiple sections of the rotating shaft and improving the detection accuracy. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 An external view of the motor rotor performance testing equipment;

[0025] Figure 2 A partial view of the motor rotor performance testing equipment;

[0026] Figure 3 A sectional view of the motor rotor performance testing equipment;

[0027] Figure 4 for Figure 3 A partial view;

[0028] Figure 5 A view of the T-ring;

[0029] Figure 6 This is a view of the relative sliding trajectory of the shaft bottom contact wheel on the bottom side of the rear shaft section of the rotor under test.

[0030] In the picture:

[0031] 11. Vertical plate; 111. Drive screw; 12. Support shaft; 121. Rear positioning cone; 122. Adjusting cone motor; 123. Adjusting sleeve; 13. Reciprocating bearing;

[0032] 21. Reciprocating roller; 211. Guide key; 22. T-ring; 221. Vertical plate; 222. Horizontal plate;

[0033] 31. Vertical slide block; 311. Constraint wheel; 32. Shaft bottom sensing seat; 321. Shaft bottom contact wheel;

[0034] 41. Lateral slide; 42. Axial sensing seat; 421. Axial contact wheel;

[0035] 51. Axial adjusting plate; 511. Clearance notch; 52. Carriage bearing; 53. Carriage sleeve; 541. Vertical adjusting frame; 542. Horizontal adjusting frame;

[0036] 61. Reciprocating motor; 611. Synchronous belt; 62. Rotor drive motor;

[0037] 71. Axial slide; 72. Shaft end mounting seat; 721. Front positioning cone; 722. Front support shaft roller;

[0038] 8. The rotor to be tested. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] See Figures 1 to 5 A motor rotor performance testing device includes a base, a vertical plate 11 fixed to the top wall of the base, and a support shaft 12 fixed to the front wall of the vertical plate 11. A reciprocating bearing 13 is fitted onto the support shaft 12, and the reciprocating bearing 13 supports a reciprocating roller 21. A T-ring 22 is fixed to the front end of the reciprocating roller 21. The T-ring 22 has a downwardly extending vertical plate 221 and two horizontal plates 222 extending in opposite directions.

[0041] A vertical slide block 31 is slidably connected to the front wall of the vertical plate 221. A shaft bottom sensing seat 32 is slidably connected to the top of the vertical slide block 31. The shaft bottom sensing seat 32 is provided with two shaft bottom contact wheels 321. A horizontal slide block 41 is slidably connected to each of the two horizontal slide blocks 222. A shaft side sensing seat 42 is slidably connected to the inner side of each of the two horizontal slide blocks 41. The shaft side sensing seat 42 is provided with a shaft side contact wheel 421.

[0042] An axial adjustment plate 51 is slidably connected to the front side of the upright plate 11. The axial adjustment plate 51 has an avoidance notch 511 in the middle (see...). Figure 2 A carriage bearing 52 is installed on the front side of the clearance notch 511. The inner ring of the carriage bearing 52 supports a carriage sleeve 53, which is linearly slidably fitted onto the reciprocating roller 21. An axially adjusting carriage is fixed to the front side of the carriage sleeve 53. The axially adjusting carriage has one vertical adjusting frame 541 and two horizontal adjusting frames 542. The two mating frame bars of the vertical adjusting frame 541 are inclined downwards from back to front, and the two mating frame bars of each horizontal adjusting frame 542 are inclined outwards from back to front. Two rows of constraint wheels 311 are provided on each of the horizontal sides of the vertical slide block 31 (see...). Figure 2 The two rows of constraint wheels 311 on the same side contact the upper and lower sides of a certain mating frame of the vertical adjustment frame 541, respectively. The upper and lower sides of the horizontal slide block 41 are each provided with two rows of constraint wheels, and the two rows of constraint wheels on the same side contact the left and right sides of a certain mating frame of the horizontal adjustment frame 542, respectively.

[0043] Specifically, see Figure 4 The support shaft 12 is a hollow shaft, which is fixedly installed on the vertical plate 11. Two reciprocating bearings 13 are sleeved on the support shaft 12, and the two reciprocating bearings 13 jointly support the reciprocating roller 21.

[0044] Specifically, see Figure 4A guide key 211 is fixedly connected to the outer wall of the reciprocating roller 21, and the inner wall of the carriage sleeve 53 is slidably connected to the guide key 211. A reciprocating motor 61 is installed inside the base (see...). Figure 3 The reciprocating motor 61 and the reciprocating drum 21 are connected by a synchronous belt 611.

[0045] Specifically, see Figure 1 The front wall of the upright plate 11 is fixedly connected with four guide columns, which are slidably engaged with the axial adjustment plate 51. The upright plate 11 is provided with two drive screws 111, and the screw nuts of the drive screws 111 are fixedly connected with the axial adjustment plate 51.

[0046] Specifically, the included angle between the mating frame of the vertical adjustment frame 541, the mating frame of the horizontal adjustment frame 542, and the central axis of the support shaft 12 is 28°-32°.

[0047] Specifically, an axial slide block 71 is slidably connected to the front side of the base, and a shaft end placement seat 72 is fixedly connected to the axial slide block 71. The shaft end placement seat 72 is provided with two front support shaft rollers 722 (see...). Figure 3 The shaft end mounting seat 72 is threadedly connected to a front positioning tapered post 721.

[0048] Specifically, see Figure 4 An end cap is fixed to the front end of the support shaft 12, and a rear positioning cone 121 is slidably inserted through the end cap. An adjusting cone motor 122 is fixed inside the support shaft 12. An adjusting sleeve 123 is coaxially fixed to the motor shaft of the adjusting cone motor 122. The adjusting sleeve 123 is threadedly connected to the rear section of the rear positioning cone 121.

[0049] Specifically, a rotor drive motor 62 is installed inside the base.

[0050] The working principle of this invention is as follows:

[0051] The rear shaft section of the rotor 8 under test is placed in the gap between the two shaft bottom contact wheels 321, so that the two shaft bottom contact wheels 321 jointly support the rear shaft section of the rotor 8 under test. The front shaft section of the rotor 8 under test is placed in the gap between the two front support shaft rollers 722, so that the two front support shaft rollers 722 jointly support the front shaft section of the rotor 8 under test, and the front positioning cone 721 abuts against the front shaft end of the rotor 8 under test. At this time, the rear end of the central axis of the rotor 8 under test is slightly tilted downward.

[0052] Subsequently, the drive screw 111 drives the axial adjusting plate 51, the slide sleeve 53, the vertical adjusting frame 541, and the two horizontal adjusting frames 542 to move forward together (relative to the reciprocating roller 21). This causes the vertical slide block 31 to move upward a certain distance via the mating frame of the vertical adjusting frame 541, resulting in the two shaft bottom contact wheels 321 moving upward a certain distance, thereby raising the rear end of the central axis of the rotor 8 under test and bringing the central axis horizontal. During this process, the mating frame of the two horizontal adjusting frames 542 drives the two horizontal slide blocks 41 to slide inward, causing the shaft side contact wheels 421 on the two horizontal slide blocks 41 to move inward to abut against the lateral sides of the rear shaft section of the rotor 8 under test. Then, the adjusting cone motor 122 drives the rear positioning cone column 121 to move forward to abut against the rear shaft end of the rotor 8 under test, thus achieving positioning. At this time, the two shaft bottom contact wheels 321 and the two shaft side contact wheels 421 correspond to the test section one of the rear shaft section of the rotor 8 under test.

[0053] Subsequently, the rotor drive motor 62 is connected to the rotor 8 under test via a belt. The drive motor 62 drives the rotor 8 to rotate, and the vertical runout at a point on the test section is sensed by the shaft bottom sensing seat 32. The shaft bottom sensing seat 32 is slidably connected to the vertical slide 31, and a compression spring is provided between them, so that the shaft bottom sensing seat 32 is in a small floating state. The shaft bottom sensing seat 32 is equipped with an acceleration sensor, and the vertical runout at a point on the test section is directly transmitted to the shaft bottom sensing seat 32. The connection method of the shaft side sensing seat 42 is the same as that of the shaft bottom sensing seat 32. The shaft side sensing seat 42 is used to sense the horizontal runout at a point on the test section.

[0054] After completing the test of section one, the belt of the rotor 8 under test is removed. Then, the adjusting cone motor 122 drives the rear positioning cone 121 to move backward a certain distance. Then, the reciprocating motor 61 drives the reciprocating roller 21 to swing back and forth at a small angle, thereby causing the shaft side contact wheel 421 and the shaft bottom contact wheel 321 to roll back and forth slightly on the circumference of the rear shaft section of the rotor 8 under test. During this process, the axial slide 71 slowly pushes the rotor 8 under test backward until the rear shaft end of the rotor 8 under test abuts against the rear positioning cone 121 again. At this time, the two shaft bottom contact wheels 321 and the two shaft side contact wheels 421 correspond to section two under test of the rear shaft section of the rotor 8 under test.

[0055] Because the axial contact wheel 421 and the bottom contact wheel 321 reciprocate slightly on the circumferential surface of the rear shaft section of the rotor 8 under test in sync with the slow backward movement of the rotor 8 under test, the relative sliding trajectory (the combined motion of rolling and axial relative sliding) between the axial contact wheel 421 and the bottom contact wheel 321 and the circumferential surface of the rear shaft section of the rotor 8 under test is wavy (e.g., Figure 6 As shown, only the relative sliding trajectory of a single shaft bottom contact wheel 321 is shown, which greatly reduces the static friction of its sliding, so that the axial slide 71 can smoothly push the rotor 8 under test backward to detect the second section under test.

[0056] By setting two shaft bottom contact wheels 321 and two shaft side contact wheels 421 to detect the vertical and horizontal vibration characteristics of the rotor 8 under test respectively, the vibration characteristics of the rotor can be analyzed more fully and comprehensively, improving the accuracy of dynamic balance correction and avoiding the risk of missed judgment due to missed detection of vertical vibration characteristics.

[0057] The two shaft bottom contact wheels 321 and the two shaft side contact wheels 421 can be easily switched to different test sections, thereby enabling the detection of multiple sections of the rotating shaft and improving the detection accuracy.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An electrical machine rotor performance detection apparatus, characterized by: The base is provided with a vertical plate, the front wall of the vertical plate is provided with a supporting shaft, the supporting shaft is provided with a reciprocating bearing, the reciprocating bearing supports a reciprocating roller, the front end of the reciprocating roller is provided with a T-shaped ring, the T-shaped ring is provided with a vertical plate extending downward and two horizontal plates extending in opposite directions, the front wall of the vertical plate is slidably connected with a vertical sliding seat, the top of the vertical sliding seat is slidably connected with an axle bottom sensing seat, the axle bottom sensing seat is provided with two axle bottom contact wheels, the two lateral horizontal plates are respectively slidably connected with a horizontal sliding seat, the inner side of each horizontal sliding seat is slidably connected with an axle side sensing seat, the axle side sensing seat is provided with an axle side contact wheel, the front side of the vertical plate is slidably connected with an axial adjusting plate, the middle part of the axial adjusting plate is provided with an avoiding gap, the front side of the edge of the avoiding gap is provided with a sliding bracket bearing, the inner ring of the sliding bracket bearing supports a sliding bracket sleeve, the sliding bracket sleeve is slidably sleeved on the outer wall of the reciprocating roller, the front side of the sliding bracket sleeve is fixedly connected with an axial adjusting sliding bracket, the axial adjusting sliding bracket is provided with a vertical adjusting frame and two horizontal adjusting frames, the two matching frame strips of the vertical adjusting frame are inclined downward from back to front, the two matching frame strips of each horizontal adjusting frame are inclined outward from back to front, two rows of restraint wheels are arranged on the transverse sides of the vertical sliding seat, the two rows of restraint wheels on the same side are respectively in contact with the upper and lower sides of a matching frame strip of the vertical adjusting frame, two rows of restraint wheels are arranged on the upper and lower sides of the horizontal sliding seat, and the two rows of restraint wheels on the same side are respectively in contact with the left and right sides of a matching frame strip of the horizontal adjusting frame.

2. The motor rotor performance detection apparatus of claim 1, wherein: The supporting shaft is a hollow shaft, the supporting shaft is fixedly arranged in the vertical plate, and the supporting shaft is provided with two reciprocating bearings.

3. The motor rotor performance detection apparatus of claim 2, wherein: The outer wall of the reciprocating roller is fixedly connected with a guide key, the inner wall of the sliding bracket sleeve is slidably connected with the guide key, and the base is provided with a reciprocating motor.

4. The motor rotor performance detection apparatus of claim 1, wherein: The front wall of the vertical plate is fixedly connected with four guide columns, the four guide columns are slidably matched with the axial adjusting plate, and the vertical plate is provided with two driving lead screws.

5. The motor rotor performance detection apparatus of claim 1, wherein: The included angle between the matching frame strips of the vertical adjusting frame and the matching frame strips of the horizontal adjusting frame and the central axis of the supporting shaft is 28°-32°.

6. The motor rotor performance detection apparatus of claim 2, wherein: The front side of the base is slidably connected with an axial sliding seat, the axial sliding seat is fixedly connected with an axle end placing seat, the axle end placing seat is provided with two front axle supporting rollers, and the axle end placing seat is threadedly connected with a front positioning conical column.

7. The motor rotor performance detection apparatus of claim 6, wherein: The front end of the supporting shaft is fixedly connected with an end cover, the end cover is slidably penetrated with a rear positioning conical column, the supporting shaft is fixedly connected with a conical motor, and the motor shaft of the conical motor is coaxially fixedly connected with an adjusting sleeve.

8. The motor rotor performance detection apparatus of claim 1, wherein: The base is provided with a rotor driving motor.

9. The method of claim 7, wherein the method further comprises: determining the position of the rotor by using the position sensor. The method comprises the following steps: Step one: the two axle bottom contact wheels jointly support the rear shaft section of the measured rotor, the two front axle supporting rollers jointly support the front shaft section of the measured rotor, and the front positioning conical column abuts against the front shaft end of the measured rotor; Step two: the vertical adjusting frame and the two lateral adjusting frames are moved forward together, the two shaft bottom contact wheels are moved up by a certain distance, the center axis of the rotor to be measured is in the horizontal direction, in this process, the matching frame strips of the two lateral adjusting frames drive the two lateral sliding seats to slide inward, so that the shaft side contact wheels arranged on the two lateral sliding seats move inward to abut against the lateral sides of the rear shaft section of the rotor to be measured, then the rear positioning cone column is moved forward to abut against the rear shaft end of the rotor to be measured by the adjusting cone motor, so that the positioning is realized, at this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the measured section one of the rear shaft section of the rotor to be measured; Step three: the rotor to be measured is rotated, the shaft bottom sensing seat is used for sensing the vertical direction jump of the measured section one, and the shaft side sensing seat is used for sensing the horizontal direction jump of the measured section one; Step four: the rear positioning cone column is moved backward by a certain distance by the adjusting cone motor, then the reciprocating roller is swung back and forth at a small angle, so as to drive the shaft side contact wheels and the shaft bottom contact wheels to reciprocate at a small amplitude on the surface of the rear shaft section of the rotor to be measured, in this process, the axial sliding seat slowly pushes the rotor to be measured to move backward until the rear shaft end of the rotor to be measured abuts against the rear positioning cone column again, at this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the measured section two of the rear shaft section of the rotor to be measured.

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