Motor rotor performance detection equipment and detection method thereof

Abstract

The invention relates to motor rotor performance detection equipment which comprises a base, a vertical plate fixedly connected to the top wall of the base, a supporting shaft fixedly connected to the front wall of the vertical plate, a reciprocating bearing arranged on the supporting shaft in a sleeving mode, a reciprocating roller supported by the reciprocating bearing, a T-shaped ring fixedly connected to the front end of the reciprocating roller, a vertical plate extending downwards and two transverse plates extending in the opposite directions arranged on the T-shaped ring, the front wall of the vertical plate is connected with a vertical sliding seat in a sliding mode, the top of the vertical sliding seat is connected with a shaft bottom sensing seat in a sliding mode, the shaft bottom sensing seat is provided with two shaft bottom contact wheels, and the transverse plates on the two sides are each connected with a transverse sliding seat in a sliding mode. According to the detection method of the motor rotor performance detection equipment, the vibration characteristics of the rotor can be analyzed more fully and comprehensively, the dynamic balance correction precision is improved, and the risk of missed judgment caused by missed detection of the vibration characteristics in the vertical direction is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of motor detection, and in particular to a motor rotor performance detection device and a detection method thereof. Background Art

[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 detection of their rotors is crucial.

[0003] Because gravity preloads the rotor vertically, the rotor support system is stiffer in the vertical direction than in the horizontal. Under the same unbalanced force, the direction with lower stiffness produces greater vibration amplitude. Therefore, existing rotor dynamic balancing equipment only places sensors in the horizontal direction of the rotor to capture more significant vibration signals. However, certain faults (such as bearing wear, misalignment, or looseness) can cause vibration in multiple directions simultaneously. For example, a bearing inner race fault may produce high-frequency shock in both the horizontal and vertical directions. Therefore, monitoring only the rotor's horizontal vibration characteristics carries the risk of missing detections.

[0004] In addition, the existing rotor dynamic balance detection only detects one section of the rotor to be tested, and its detection accuracy is low. Summary of the Invention

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

[0006] To achieve the above object, the present invention provides the following technical solutions: The cam is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate. The toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate. The toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate. The cam is fixed on the front of the roller coaster and is used to adjust the speed of the roller coaster so that the roller coaster can move freely.

[0007] Specifically, the supporting shaft is a hollow shaft, which is fixedly passed through the vertical plate. The supporting shaft sleeve is provided with two reciprocating bearings, and the two reciprocating bearings jointly support the reciprocating roller.

[0008] Specifically, a guide key is fixed to the outer wall of the reciprocating drum, the inner wall of the slide sleeve is slidably connected to the guide key, a reciprocating motor is provided in the base, and the reciprocating motor is connected to the reciprocating drum through a synchronous belt.

[0009] Specifically, four guide columns are fixedly connected to the front wall of the vertical plate, and the four guide columns are slidably matched with the axial adjustment plate. The vertical plate is provided with two driving screws, and the screw nuts of the driving screws are fixedly connected to the axial adjustment plate.

[0010] Specifically, the angles between the matching frame strips of the vertical adjustment frame, the matching frame strips of the horizontal adjustment frame and the central axis of the support shaft are 28°-32°.

[0011] Specifically, the front side of the base is slidably connected to an axial slide, the axial slide is fixedly connected to an axis end placement seat, the axis end placement seat is provided with two front support shaft rollers, and the axis end placement seat is threadedly connected to a front positioning cone column.

[0012] Specifically, the front end of the supporting shaft is fixed with an end cover, the end cover is slidably passed through the rear positioning cone column, the supporting shaft is fixed with a cone adjustment motor, the motor shaft of the cone adjustment motor is coaxially fixed with an adjustment sleeve, and the adjustment sleeve is threadedly connected to the rear section of the rear positioning cone column.

[0013] Specifically, a rotor drive motor is provided in the base.

[0014] A method for detecting a motor rotor performance detection device comprises the following steps: Step 1: Make the two bottom contact wheels jointly support the rear shaft section of the rotor to be tested, make the two front support shaft rollers jointly support the front shaft section of the rotor to be tested, and make the front positioning cone abut against the front shaft end of the rotor to be tested; Step 2: The vertical adjustment frame and the two lateral adjustment frames move forward together, so that the two shaft bottom contact wheels move up a certain distance, so that the central axis of the rotor to be measured is horizontal. During this process, the matching frame bars of the two lateral adjustment frames drive the two lateral slides to slide inward, so that the shaft side contact wheels provided on the two lateral slides move inward to abut against the lateral sides of the rear shaft section of the rotor to be measured. Then, the cone adjustment motor drives the rear positioning cone column to move forward to abut against the rear shaft end of the rotor to be measured, thereby achieving positioning. At this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the first section to be measured of the rear shaft section of the rotor to be measured; Step 3: Rotate the rotor to be measured. The shaft bottom sensing seat is used to sense the vertical runout of a section to be measured, and the shaft side sensing seat is used to sense the horizontal runout of a section to be measured. Step 4: The cone adjustment motor drives the rear positioning cone column to move back a certain distance, and 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 in a small amplitude on the circumference of the rear shaft section of the rotor to be measured. During this process, the axial slide slowly pushes the rotor to be measured to move back until the rear shaft end of the rotor to be measured again abuts against the rear positioning cone column. At this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the second section to be measured of the rear shaft section of the rotor to be measured.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By providing two shaft bottom contact wheels 321 and two shaft side contact wheels 421 to respectively detect the vibration characteristics of the rotor 8 to be tested in the vertical and horizontal directions, the vibration characteristics of the rotor can be analyzed more fully and comprehensively, the accuracy of dynamic balancing correction can be improved, and the risk of missed judgment due to missed detection of vertical vibration characteristics can be avoided.

[0016] The two shaft bottom contact wheels 321 and the two shaft side contact wheels 421 can be easily switched to different sections to be measured, thereby being able to detect multiple sections of the rotating shaft and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is the appearance view of the motor rotor performance testing equipment; Figure 2 This is a partial view of the motor rotor performance testing equipment; Figure 3 It is a cross-sectional view of the motor rotor performance testing equipment; Figure 4 for Figure 3 A partial view of Figure 5 This is a view of a T-ring; 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 to be tested.

[0019] In the picture: 11. Vertical plate; 111. Driving screw; 12. Support shaft; 121. Rear positioning cone column; 122. Cone adjustment motor; 123. Adjusting sleeve; 13. Reciprocating bearing; 21. Reciprocating roller; 211. Guide key; 22. T-ring; 221. Vertical plate; 222. Horizontal plate; 31. Vertical slide; 311. Constraint wheel; 32. Shaft bottom sensing seat; 321. Shaft bottom contact wheel; 41. Horizontal slide; 42. Axis side sensing seat; 421. Axis side contact wheel; 51. Axial adjustment plate; 511. Avoidance notch; 52. Slide bearing; 53. Slide sleeve; 541. Vertical adjustment frame; 542. Horizontal adjustment frame; 61. Reciprocating motor; 611. Synchronous belt; 62. Rotor drive motor; 71, axial slide; 72, shaft end placement seat; 721, front positioning cone; 722, front support shaft roller; 8. Rotor to be tested. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See Figures 1 to 5A motor rotor performance testing device includes a base, with a vertical plate 11 fixedly attached to the top wall of the base. A support shaft 12 is fixedly attached to the front wall of the vertical plate 11. A reciprocating bearing 13 is mounted on the support shaft 12, which supports a reciprocating roller 21. A T-ring 22 is fixedly attached to the front end of the reciprocating roller 21. The T-ring 22 has a downward-extending vertical plate 221 and two transverse plates 222 extending in opposite directions.

[0022] A vertical slide 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 31. The shaft-bottom sensing seat 32 is equipped with two shaft-bottom contact wheels 321. Each of the transverse plates 222 is slidably connected to a transverse slide 41. The inner sides of each transverse slide 41 are slidably connected to a shaft-side sensing seat 42, each equipped with a shaft-side contact wheel 421.

[0023] The front side of the vertical plate 11 is slidably connected to an axial adjustment plate 51, and a relief notch 511 is provided in the middle of the axial adjustment plate 51 (see Figure 2 ), a carriage bearing 52 is installed on the front side of the edge of the avoidance gap 511. The inner ring of the carriage bearing 52 supports a carriage sleeve 53. The carriage sleeve 53 can be linearly slidably sleeved on the outside of the reciprocating roller 21. The front side of the carriage sleeve 53 is fixedly connected to an axial adjustment carriage. The axial adjustment carriage is provided with a vertical adjustment frame 541 and two lateral adjustment frames 542. The two matching frame bars of the vertical adjustment frame 541 are tilted downward from the back to the front, and the two matching frame bars of each lateral adjustment frame 542 are tilted outward from the back to the front. Two rows of constraint wheels 311 are provided on each lateral side of the vertical slide 31 (see Figure 2 ), the two rows of constraint wheels 311 on the same side respectively contact the upper and lower sides of a matching frame strip of the vertical adjustment frame 541. The upper and lower sides of the horizontal slide 41 are each provided with two rows of constraint wheels, and the two rows of constraint wheels on the same side respectively contact the left and right sides of a matching frame strip of the horizontal adjustment frame 542.

[0024] Specifically, see Figure 4 The supporting shaft 12 is a hollow shaft, which is fixedly installed on the vertical plate 11 . The supporting shaft 12 is sleeved with two reciprocating bearings 13 , which jointly support the reciprocating roller 21 .

[0025] Specifically, see Figure 4 The outer wall of the reciprocating roller 21 is fixed with a guide key 211, and the inner wall of the slide sleeve 53 is slidably connected to the guide key 211. A reciprocating motor 61 (see Figure 3 ), the reciprocating motor 61 is connected to the reciprocating roller 21 through a synchronous belt 611.

[0026] Specifically, see Figure 1Four guide columns are fixedly connected to the front wall of the vertical plate 11, and the four guide columns are slidably matched with the axial adjustment plate 51. The vertical plate 11 is provided with two driving screws 111, and the screw nuts of the driving screws 111 are fixedly connected to the axial adjustment plate 51.

[0027] Specifically, the angles between the matching frame strips of the vertical adjustment frame 541 , the matching frame strips of the horizontal adjustment frame 542 and the central axis of the support shaft 12 are 28°-32°.

[0028] Specifically, the front side of the base is slidably connected to an axial slide 71, the axial slide 71 is fixedly connected to an axis end placement seat 72, and the axis end placement seat 72 is provided with two front support shaft rollers 722 (see Figure 3 The shaft end placement seat 72 is threadedly connected to a front positioning cone column 721.

[0029] Specifically, see Figure 4 The front end of the supporting shaft 12 is fixed with an end cover, and the end cover can be slidably passed through the rear positioning cone column 121. The supporting shaft 12 is fixed with a cone adjustment motor 122, and the motor shaft of the cone adjustment motor 122 is coaxially fixed with an adjusting sleeve 123. The adjusting sleeve 123 is threadedly connected to the rear section of the rear positioning cone column 121.

[0030] Specifically, a rotor drive motor 62 is provided in the base.

[0031] The working principle of the present invention is as follows: The rear axle section of the rotor 8 to be tested 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 axle section of the rotor 8 to be tested. The front axle section of the rotor 8 to be tested is placed in the gap between the two front support rollers 722, so that the two front support rollers 722 jointly support the front axle section of the rotor 8 to be tested, and the front positioning cone 721 abuts against the front axle end of the rotor 8 to be tested. At this point, the rear end of the central axis of the rotor 8 to be tested is slightly tilted downward.

[0032] Next, the drive screw 111 drives the axial adjustment plate 51, the carriage sleeve 53, the vertical adjustment frame 541, and the two lateral adjustment frames 542 forward (relative to the reciprocating roller 21). This, through the mating bars of the vertical adjustment frame 541, drives the vertical slide 31 upward a certain distance, causing the two bottom-shaft contact wheels 321 to move upward a certain distance, thereby raising the rear end of the central axis of the rotor 8 under test, bringing it to a horizontal position. During this process, the mating bars of the two lateral adjustment frames 542 drive the two lateral slides 41 inward, causing the side-shaft contact wheels 421 provided on these slides to move inward until they abut against the lateral sides of the rear shaft section of the rotor 8 under test. Subsequently, the cone adjustment motor 122 drives the rear positioning cone 121 forward until it abuts against the rear end of the rotor 8 under test, achieving positioning. At this point, the two bottom-shaft contact wheels 321 and the two side-shaft contact wheels 421 correspond to the first section to be measured of the rear shaft section of the rotor 8 under test.

[0033] Next, the rotor drive motor 62 is connected to the rotor 8 to be measured via a belt. The drive motor 62 drives the rotor 8 to rotate, and vertical runout at a point in the section to be measured is sensed by the shaft bottom sensing seat 32: the shaft bottom sensing seat 32 is slidably connected to the vertical slide 31, with a compression spring interposed between the two, which keeps the shaft bottom sensing seat 32 in a slightly floating state. The shaft bottom sensing seat 32 is equipped with an acceleration sensor, and vertical runout at a point in the section to be measured is directly transmitted to the shaft bottom sensing seat 32. The shaft side sensing seat 42 is connected in the same manner as the shaft bottom sensing seat 32 and is used to sense horizontal runout at a point in the section to be measured.

[0034] After completing the inspection of section 1, the belt of rotor 8 is removed. Then, the cone adjustment motor 122 drives the rear positioning cone 121 backward a certain distance. The reciprocating motor 61 then drives the reciprocating roller 21 to swing back and forth at a small angle, thereby driving the shaft-side contact wheels 421 and the shaft-bottom contact wheels 321 to roll back and forth slightly along the circumference of the rear shaft section of rotor 8. During this process, the axial slide 71 slowly pushes the rotor 8 backward until the rear end of the rotor 8 again abuts the rear positioning cone 121. At this point, the two shaft-bottom contact wheels 321 and the two shaft-side contact wheels 421 correspond to section 2 of the rear shaft section of rotor 8.

[0035] Since the shaft side contact wheel 421 and the shaft bottom contact wheel 321 roll back and forth in a small amplitude on the circumference of the rear shaft section of the rotor 8 to be tested and the rotor 8 to be tested moves slowly backward synchronously, the relative sliding (the combined motion of rolling and axial relative sliding) trajectory of the shaft side contact wheel 421 and the shaft bottom contact wheel 321 and the circumference of the rear shaft section of the rotor 8 to be tested is a wave-shaped (such as Figure 6 As shown, only the relative sliding trajectory of a single shaft bottom contact wheel 321 is shown), so that the static friction force of its sliding is greatly reduced, so that the axial slide 71 can smoothly push the rotor 8 to be tested backward to detect the second section to be tested.

[0036] By providing two shaft bottom contact wheels 321 and two shaft side contact wheels 421 to respectively detect the vibration characteristics of the rotor 8 to be tested in the vertical and horizontal directions, the vibration characteristics of the rotor can be analyzed more fully and comprehensively, the accuracy of dynamic balancing correction can be improved, and the risk of missed judgment due to missed detection of vertical vibration characteristics can be avoided.

[0037] The two shaft bottom contact wheels 321 and the two shaft side contact wheels 421 can be easily switched to different sections to be measured, thereby being able to detect multiple sections of the rotating shaft and improving the detection accuracy.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A motor rotor performance testing device, characterized by: The cam is fixedly provided with a support shaft, and the support sleeve is provided with a reciprocating bearing, and the reciprocating bearing supports a reciprocating roller. The front end of the reciprocating roller is fixedly provided with a T-shaped ring, and 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 to the vertical slide, and the top of the vertical slide is slidably connected to the shaft bottom sensing seat, and the shaft bottom sensing seat is provided with two shaft bottom contact wheels. The horizontal plates on both sides are slidably connected to a horizontal slide respectively, and the inner sides of the two horizontal slides are slidably connected to the shaft side sensing seat, and the shaft side sensing seat is provided with a shaft side contact wheel. The front side of the vertical plate is slidably connected to the axial adjustment plate, and the middle part of the axial adjustment plate is provided with an avoidance notch. The axial adjustment slide is fixedly connected to the front side of the slide sleeve, and the axial adjustment slide is provided with a vertical adjustment frame and two horizontal adjustment frames. The two matching frame strips of the vertical adjustment frame are tilted downward from the back to the front, and the two matching frame strips of each horizontal adjustment frame are tilted outward from the back to the front. Two rows of constraint wheels are provided on each horizontal side of the vertical slide, and the two rows of constraint wheels on the same side are respectively in contact with the upper and lower sides of a matching frame strip of the vertical adjustment frame. Two rows of constraint wheels are provided on the upper and lower sides of the horizontal slide, and the two rows of constraint wheels on the same side are respectively in contact with the left and right sides of a matching frame strip of the horizontal adjustment frame.

2. The motor rotor performance testing device according to claim 1, characterized in that: The supporting shaft is a hollow shaft, which is fixedly passed through the vertical plate. The supporting shaft sleeve is provided with two reciprocating bearings, which jointly support the reciprocating roller.

3. The motor rotor performance testing device according to claim 2, characterized in that: The outer wall of the reciprocating drum is fixed with a guide key, the inner wall of the slide sleeve is slidably connected to the guide key, a reciprocating motor is arranged in the base, and the reciprocating motor is connected to the reciprocating drum through a synchronous belt.

4. The motor rotor performance testing device according to claim 1 is characterized in that: Four guide columns are fixedly connected to the front wall of the vertical plate, and the four guide columns are slidably matched with the axial adjustment plate. The vertical plate is provided with two driving screws, and the screw nuts of the driving screws are fixedly connected to the axial adjustment plate.

5. The motor rotor performance testing device according to claim 1, characterized in that: The included angles between the matching frame strips of the vertical adjustment frame, the matching frame strips of the horizontal adjustment frame and the central axis of the supporting shaft are 28°-32°.

6. The motor rotor performance testing device according to claim 2, characterized in that: The front side of the base is slidably connected to an axial slide seat, the axial slide seat is fixedly connected to an axis end placement seat, the axis end placement seat is provided with two front support shaft rollers, and the axis end placement seat is threadedly connected to a front positioning cone column.

7. The motor rotor performance testing device according to claim 6, characterized in that: The front end of the supporting shaft is fixed with an end cover, and the end cover is slidably penetrated by a rear positioning cone column. A cone adjustment motor is fixed in the supporting shaft, and an adjustment sleeve is coaxially fixed to the motor shaft of the cone adjustment motor. The adjustment sleeve is threadedly connected to the rear section of the rear positioning cone column.

8. The motor rotor performance testing device according to claim 1, characterized in that: A rotor drive motor is arranged in the base.

9. The detection method of the motor rotor performance detection device according to claim 7, characterized in that: The following steps are involved: Step 1: Make the two bottom contact wheels jointly support the rear shaft section of the rotor to be tested, make the two front support shaft rollers jointly support the front shaft section of the rotor to be tested, and make the front positioning cone abut against the front shaft end of the rotor to be tested; Step 2: The vertical adjustment frame and the two lateral adjustment frames move forward together, so that the two shaft bottom contact wheels move up a certain distance, so that the central axis of the rotor to be measured is horizontal. During this process, the matching frame bars of the two lateral adjustment frames drive the two lateral slides to slide inward, so that the shaft side contact wheels provided on the two lateral slides move inward to abut against the lateral sides of the rear shaft section of the rotor to be measured. Then, the cone adjustment motor drives the rear positioning cone column to move forward to abut against the rear shaft end of the rotor to be measured, thereby achieving positioning. At this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the first section to be measured of the rear shaft section of the rotor to be measured; Step 3: Rotate the rotor to be measured. The shaft bottom sensing seat is used to sense the vertical runout of a section to be measured, and the shaft side sensing seat is used to sense the horizontal runout of a section to be measured. Step 4: The cone adjustment motor drives the rear positioning cone column to move back a certain distance, and 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 in a small amplitude on the circumference of the rear shaft section of the rotor to be measured. During this process, the axial slide slowly pushes the rotor to be measured to move back until the rear shaft end of the rotor to be measured again abuts against the rear positioning cone column. At this time, the two shaft bottom contact wheels and the two shaft side contact wheels correspond to the second section to be measured of the rear shaft section of the rotor to be measured.

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