Motor performance and fault rapid detection device

Abstract

The invention relates to the technical field of mechanical detection, in particular to a motor performance and fault rapid detection device which comprises a placement platform, a power supply part is arranged at the bottom of the placement platform, an extension detection plate is arranged on one side of the placement platform, and a machine body clamping and fixing assembly is arranged on one side of the placement platform; the extension detection plate is fixedly connected with a rotor positioning rod, and the top end of the rotor positioning rod is rotatably connected with a rotor clamping assembly. A first photoelectric emission assembly is arranged on the rotor clamping assembly, a vertical baffle is arranged on one side of the extension detection plate, a photoelectric receiving assembly is arranged on the vertical baffle, and a data processor is integrated in the vertical baffle; the data processor is in signal connection with a second photoelectric emission assembly; according to the invention, the rotor position identification signal and the machine body position identification signal of the to-be-detected motor are obtained, the data processor solves the relative motion track of the rotor by taking the machine body position identification signal as a reference, pollution of the whole machine vibration of the to-be-detected motor to the rotor vibration signal is eliminated, and the fault characteristics of the rotor of the to-be-detected motor are accurately extracted.

Description

Technical Field

[0001] This invention relates to the field of mechanical testing technology, specifically to a device for rapid detection of motor performance and faults. Background Technology

[0002] As the core driving unit of modern industry, the stability and reliability of the electric motor's operation directly affect the efficiency and safety of the entire production system.

[0003] Regarding the types of motor faults, they mainly include stator faults, rotor faults, and other faults. This solution mainly targets rotor faults, which specifically include rotor imbalance (such as uneven mass distribution, detached balance weights), rotor misalignment (deviation from the axis of the stator or other components), or rotor shaft bending deformation, etc. Existing motor fault detection technologies, such as the Chinese patent publication document CN104215395A, disclose a method and device for detecting rotor imbalance faults. It mainly collects and analyzes the vibration signals of the motor rotor during the driving process to determine the amount of rotor imbalance, which can effectively reduce the economic losses caused by downtime for inspection, and at the same time reduce the safety hazards caused by untimely maintenance and correction.

[0004] However, in practical engineering applications, fault diagnosis solely based on rotor vibration signals has limitations. The core issue lies in the reference error caused by improper selection of the reference object. For example, when the motor mounting base is loose, it can cause micro-vibrations in the entire machine. In this case, the rotor vibration signal will be superimposed with the interference components of the overall machine motion, making it impossible to accurately characterize the rotor's own fault characteristics, thus increasing the risk of misdiagnosis. Therefore, it is necessary to propose a detection device that integrates local rotor vibration signals and overall motor vibration signals to reduce the interference of mounting performance attenuation factors on fault detection accuracy. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a rapid detection device for motor performance and faults. By acquiring the rotor position identification signal and the body position identification signal of the motor under test, the data processor calculates the relative motion trajectory of the rotor based on the body position identification signal, eliminating the contamination of the rotor vibration signal by the overall vibration of the motor under test, and accurately extracting the fault characteristics of the rotor of the motor under test.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a rapid detection device for motor performance and faults, comprising a placement platform, a power supply component for power-on detection of the motor under test is configured at the bottom of the placement platform, an extension detection plate is slidably connected to one side of the placement platform, and a body clamping assembly for clamping the motor under test is provided on the side of the placement platform away from the extension detection plate.

[0007] A rotor positioning rod is fixedly connected to the extended detection plate. A rotor clamping assembly for clamping the rotor of the motor under test is rotatably connected to the top of the rotor positioning rod. After the power supply unit powers on the motor under test, the rotor clamping assembly rotates synchronously with the rotation of the rotor of the motor under test.

[0008] A first photoelectric transmitting component for transmitting a rotor position identification signal representing the motor under test is fixedly connected to the rotor clamping assembly. A vertical baffle is fixedly connected to the side of the extended detection plate away from the placement platform. A photoelectric receiving component for receiving two-dimensional coordinate data of the rotor position identification signal and recording the motion trajectory of the corresponding identification point is vertically slidably connected to the vertical baffle. A data processor is installed on the side of the vertical baffle away from the extended detection plate. The data processor receives the two-dimensional coordinate position data of the identification point transmitted by the photoelectric receiving component in real time and calculates the real-time speed of the rotor of the motor under test by periodic analysis of the motion trajectory of the identification point.

[0009] The data processor is connected to a second photoelectric transmitter, which is installed on the motor under test. The second photoelectric transmitter is used to transmit a body position identification signal representing the motor under test. Based on the two-dimensional coordinates of the body position identification signal, the data processor corrects the motion trajectory of the corresponding identification point of the rotor position identification signal and outputs the rotor position fault diagnosis result of the motor under test.

[0010] The technical principle of the above solution is as follows: This solution uses a placement platform to place the motor under test. The body clamping component on one side of the placement platform fixes the motor body under test in a fixed position. The rotor clamping component on the extended detection plate on the other side of the placement platform rotates synchronously with the rotor of the motor under test after power-on and emits a rotor position identification signal. The photoelectric receiving component collects the two-dimensional trajectory data of this signal. The data processor calculates the real-time speed of the rotor based on the periodic analysis of the trajectory. At the same time, combined with the body position identification signal provided by the second photoelectric transmitting component installed on the body, through time synchronization and trajectory correction, the rotor position fault diagnosis result is output, thus realizing the rapid detection of motor performance and faults.

[0011] The above approach has the following beneficial effects:

[0012] 1. This solution uses photoelectric receiving components to receive information from the first and second photoelectric transmitting components and simultaneously collect rotor position identification signals and machine body position identification signals. Based on the machine body position identification signal, the rotor position identification signal is corrected to represent the trajectory of the rotor rotation of the motor under test. This eliminates the superposition interference of the overall vibration of the motor under test on the rotor vibration signal, accurately separates the rotor's own fault characteristic components, avoids misdiagnosis caused by base loosening, and solves the benchmark error problem caused by improper selection of reference objects.

[0013] 2. This solution uses an independent signal acquisition and synchronous processing mechanism for the rotor and the machine body to avoid the influence of rigid fixation with slight loosening or flexible clamping damping filtering on the rotor vibration signal, ensuring the authenticity and reliability of the signal and reducing the vibration signal contamination problem caused by the flexible clamping method of the motor under test in conventional technology.

[0014] 3. This solution is designed to acquire photoelectric signals and analyze the two-dimensional trajectory of the photoelectric signals to obtain the rotor's rotation trajectory, obtain the rotor speed and rotor fault diagnosis results in real time, and improve detection efficiency and data correlation.

[0015] Furthermore, the machine body clamping assembly includes a clamping plate fixedly connected to the placement platform. The clamping plate has symmetrical clamping grooves on the side near the placement platform. Clamping blocks are slidably connected in each clamping groove. The clamping plate is provided with clamping drive components for driving the symmetrical clamping blocks to move closer or further away from each other.

[0016] The clamping blocks are all fixedly connected to each other on one side by an elastic layer.

[0017] Beneficial effects: By using symmetrically opened clamping grooves and slidingly connected clamping blocks, the clamping drive component drives the clamping blocks to move closer or further away synchronously. The elastic layer provides cushioning. The symmetrical structure ensures that the motor body is automatically centered during clamping. The elastic layer avoids rigid contact and compensates for dimensional tolerances, achieving stable clamping of motor bodies of different specifications, preventing scratches on the surface of the body, and ensuring that the motor remains in the center position during the inspection process, which facilitates subsequent rotor inspection.

[0018] Furthermore, the clamping drive component includes a first motor and a circular rotating disk. The first motor is fixedly connected to the side of the clamping plate away from the placement platform. The output end of the first motor passes through the clamping plate and is fixedly connected to the center of the circular rotating disk. Connecting rod groups are symmetrically fixedly connected to both sides of the circular rotating disk. The side of the connecting rod group away from the circular rotating disk is respectively hinged to the corresponding clamping block. The connecting rod groups are all used to convert the rotation of the circular rotating disk into the sliding displacement of the corresponding clamping block along the clamping groove in conjunction with the clamping slide.

[0019] Beneficial effects: The first motor drives the circular rotating disk to rotate, and the linkage group converts the rotational motion into the linear sliding displacement of the clamping block along the symmetrical slide groove (i.e., the symmetrical linear clamping force of the motor under test), realizing the synchronous movement of the clamping block, ensuring that the clamping block applies a uniform clamping force, so that the motor under test is automatically centered and firmly clamped, adapting to motors under test of different sizes and being simple and efficient to operate.

[0020] Furthermore, the rotor positioning rod is an electrically controlled telescopic rod, the bottom of which is fixedly connected to the extended detection plate. The output shaft of the electrically controlled telescopic rod is detachably connected to a rotating frame, and the rotor clamping assembly is rotatably connected to the rotating frame.

[0021] Beneficial effects: This design allows for adjustment of the vertical height of the rotor clamping assembly via an electrically controlled telescopic rod. The detachable rotating frame facilitates the installation and maintenance of the rotor clamping assembly, adapting to the shaft height of different models of motor rotors under test, thus improving the versatility of the testing device. At the same time, it simplifies the disassembly and assembly process of the rotor clamping assembly, thereby increasing testing efficiency.

[0022] Furthermore, the rotor clamping assembly includes a lockable and adjustable three-jaw self-centering chuck, which is rotatably connected to the rotating frame.

[0023] Beneficial effects: The radial clamping of the three-jaw self-centering chuck enables coaxial clamping of the rotor of the motor under test. After locking, the rotor drives the three-jaw self-centering chuck to rotate coaxially, so as to quickly achieve coaxial positioning and stable clamping of the rotor. It is compatible with rotor output shafts of different diameters, ensuring coaxiality during rotor rotation and providing a precise reference for subsequent position signal acquisition.

[0024] Furthermore, the first photoelectric emission component includes symmetrical first laser emitters, each of which is fixedly connected to a three-jaw self-centering chuck, and the line connecting the two first laser emitters passes through the center point of the three-jaw self-centering chuck.

[0025] The photoelectric receiving component includes a two-dimensional surface PSD receiving plate;

[0026] The second photoelectric emission assembly includes a rigid clamp and a second laser emitter. The second laser emitter is fixedly connected to the rigid clamp, which is clamped onto the output shaft protrusion of the housing of the motor under test.

[0027] Beneficial effects: The symmetrical first laser emitter provides the rotation phase and position signal of the rotor of the motor under test. The two-dimensional surface PSD receiving board collects the rotor rotation trajectory data provided by the symmetrical first laser emitter. The second laser emitter provides the position reference signal of the motor under test (i.e., the vibration signal of the motor under test). The vibration signal of the motor under test is used to feed back and compensate for the true rotation state of its rotor. The two-dimensional trajectory data of the rotor provides the basis for speed calculation and fault diagnosis.

[0028] Furthermore, the specific data processing for the rotor position fault diagnosis results of the motor under test output by the data processor is as follows:

[0029] The data processor first timestamps the rotor position identification signal data and the machine body position identification signal data using a time synchronization algorithm. Then, using the two-dimensional coordinates of the machine body position identification signal as a reference, it calculates the relative motion trajectory of the rotor of the motor under test relative to its machine body. Subsequently, it performs geometric shape fitting and frequency domain feature extraction on the relative motion trajectory of the rotor of the motor under test. If the trajectory shows periodic eccentricity or irregular fluctuations, it is determined that the rotor has a real imbalance fault. Finally, it performs quantitative analysis based on the amplitude, frequency, and phase characteristics of the relative motion trajectory of the rotor of the motor under test, and outputs the fault diagnosis result of the rotor imbalance degree.

[0030] Beneficial effects: By aligning rotor and machine body signals through a time synchronization algorithm, and using the machine body position identification signal data as a reference, the relative motion trajectory of the rotor is calculated to eliminate the interference of machine body vibration on rotor signals, extract fault features for diagnosis, eliminate whole machine vibration interference, accurately identify the true rotor imbalance fault, quantify the degree of fault, and improve the reliability and accuracy of diagnostic results.

[0031] Furthermore, the sliding connection between the two-dimensional PSD receiving plate and the vertical baffle includes a height adjustment groove opened on the vertical baffle, a support block is slidably connected in the height adjustment groove, and the two-dimensional PSD receiving plate is embedded in the support block on the side near the placement platform.

[0032] The vertical baffle has an adjustment groove with a corresponding height adjustment groove length. A ball screw is installed in the adjustment groove. The ball nut of the ball screw is fixedly connected to the bearing block. A second motor is fixedly connected to the top of the vertical baffle. The output shaft of the second motor is coaxially fixedly connected to the threaded rod of the ball screw. The second motor is connected to the data processor signal.

[0033] The data processor acquires in real time the receiving coordinates of the rotor position identification signal emitted by the symmetrically set first laser emitter on the two-dimensional surface PSD receiving plate, and compares the coordinates with the preset center coordinates of the two-dimensional surface PSD receiving plate to calculate the vertical deviation value. Then, based on the deviation value, it sends a control command to the second motor to make the center of the two-dimensional surface PSD receiving plate face the detection area of ​​the rotor of the motor under test.

[0034] Beneficial effects: The height is adjusted by using a ball screw and a motor. The data processor compares the received coordinates with the center coordinates and controls the motor to adjust the height. By processing the rotor position marking signal received by the two-dimensional PSD receiving board, the vertical position of the receiving board is adjusted to ensure that its center is aligned with the rotor detection area. This eliminates signal acquisition distortion caused by the vertical position offset between the two-dimensional PSD receiving board and the first laser emitter, improves the acquisition accuracy of the rotor position marking signal, and ensures the accuracy of subsequent speed calculation and fault diagnosis.

[0035] Furthermore, the sliding connection between the extended detection plate and the placement platform includes several telescopic grooves opened in the placement platform. Symmetrical extension rods are fixedly connected to the side of the extended detection plate near the placement platform, and the extension rods are slidably engaged in the corresponding telescopic grooves.

[0036] Beneficial effects: The symmetrical extension rods slide within the telescopic groove, providing stable guiding constraints and preventing lateral tilting or offset during the sliding process of the adjustment extension detection plate. This ensures that the extension detection plate maintains precise coaxial alignment with the rotor positioning rod when it moves the vertical baffle, avoiding signal receiving position offset due to sliding deviation and improving the accuracy of rotor coordinate data acquisition.

[0037] Furthermore, the bottom of the placement platform is equipped with several support components for adjusting the flatness of the placement platform;

[0038] All support components include electric lifting feet, the top of which is hinged to the bottom of the platform. Each electric lifting foot integrates a pressure sensor, and several pressure sensors and electric lifting feet are connected to the data processor.

[0039] The data processor receives pressure data transmitted from each pressure sensor, analyzes the pressure deviation of the support points corresponding to each electric lifting foot based on several pressure data, calculates the height compensation amount of the corresponding electric lifting foot based on the pressure deviation, and sends a lifting control signal corresponding to the pressure deviation to each electric lifting foot.

[0040] Beneficial effects: The electric lifting feet at the bottom of the platform have built-in pressure sensors. The data processor receives pressure data and analyzes the deviation, calculates the height compensation amount, and controls the adjustment of the lifting feet. By collecting pressure and adjusting the balance, the flatness of the platform is adjusted, eliminating the initial tilt of the platform and avoiding signal pollution caused by the tilt of the platform. This improves the accuracy and reliability of the rotor operation status detection of the motor under test.

[0041] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the motor performance and fault rapid detection device of the present invention;

[0043] Figure 2 This is an isometric view of the placement platform in an embodiment of the motor performance and fault rapid detection device of the present invention;

[0044] Figure 3 This is an isometric view of the rotor clamping assembly in an embodiment of the motor performance and fault rapid detection device of the present invention.

[0045] Figure 4 This is an isometric view of the rotor positioning rod in an embodiment of the motor performance and fault rapid detection device of the present invention.

[0046] Figure 5 This is an isometric view of the second photoelectric emitting component in an embodiment of the motor performance and fault rapid detection device of the present invention.

[0047] Figure 6 This is a schematic diagram of the operation of the data processor in an embodiment of the motor performance and fault rapid detection device of the present invention.

[0048] The reference numerals in the accompanying drawings include: 1. Placement platform; 2. Power supply component; 3. Extension detection plate; 4. Machine body clamping assembly; 401. Clamping plate; 402. Clamping groove; 403. Clamping block; 404. First motor; 405. Circular rotating disk; 406. First connecting rod; 407. Second connecting rod; 408. Elastic layer; 5. Rotor positioning rod; 6. Rotating frame; 7. Rotor clamping assembly; 701. Three-jaw self-centering chuck; 8. First laser emitter; 9. Vertical baffle; 10. Two-dimensional surface PSD receiving plate; 11. Clamper; 12. Second laser emitter; 13. Height adjustment groove; 14. Bearing block; 15. Adjustment groove; 16. Ball screw component; 17. Second motor; 18. Telescopic groove; 19. Extension rod; 20. Electric lifting foot. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The following detailed description illustrates the specific implementation method:

[0053] Example 1:

[0054] This embodiment provides a device for rapid detection of motor performance and faults, specifically as follows: Figure 1 As shown, the device includes a placement platform 1. At the bottom of the placement platform 1 is a power supply unit 2 for power-on testing of the motor under test (the power supply unit 2 is designed with reference to the test power supply in the MC series motor fault detector). The power supply unit 2 is electrically connected to the motor under test through wiring terminals, providing adjustable voltage and frequency power output to simulate different operating conditions such as no-load start, rated load operation, and short-time overload test, so as to quickly realize the power-on testing of motor performance and faults.

[0055] This embodiment addresses rotor faults in the motor under test. A body clamping assembly 4 for holding the motor under test is provided on one side of the placement platform 1. Specifically, in conjunction with… Figure 2 and Figure 3 As shown, the machine body clamping assembly 4 includes a clamping plate 401 welded to the placement platform 1. The clamping plate 401 has symmetrical clamping grooves 402 on the side near the placement platform 1. Clamping blocks 403 are slidably connected to each clamping groove 402 via a T-shaped sliding block structure. The clamping plate 401 is equipped with clamping driving components for driving the symmetrical clamping blocks 403 to move closer or further apart. Specifically, the clamping driving components include a first motor 404 (e.g., ...). Figure 1(As shown) and a circular rotating disk 405, a first motor 404 is fixedly connected to the clamping plate 401 on the side away from the placement platform 1. The output shaft of the first motor 404 passes through the clamping plate 401 and is fixedly connected coaxially to the center of the circular rotating disk 405. Connecting rod assemblies are symmetrically fixedly connected to both sides of the circular rotating disk 405. Each connecting rod assembly includes a first connecting rod 406 integrally formed with the circular rotating disk 405 (the first connecting rod 406 moves synchronously with the circular rotating disk 405). A second connecting rod 407 is hinged to the end of each first connecting rod 406 away from the circular rotating disk 405. The second connecting rod 407 is respectively connected to... The corresponding clamping block 403 is hinged; the second connecting rod 407 converts the rotational motion into a linear driving force along the clamping slide 402, pushing the two symmetrical clamping blocks 403 to move closer to each other synchronously along the clamping slide 402 on the clamping plate 401 until the symmetrical clamping blocks are tightly attached to the outer walls of both sides of the motor body under test. The symmetrically distributed clamping force is used to achieve a stable clamping of the motor body under test. The design of this clamping method can ensure that the motor under test is automatically centered relative to the placement platform 1 and located on the center line of the placement platform 1 during the clamping process, which provides convenience for the subsequent detection of the rotor of the motor under test.

[0056] In addition, such as Figure 3 As shown, each of the clamping blocks 403 is fixedly connected to an elastic layer 408 on one side close to the other. The elastic layer 408 can prevent rigid contact between the clamping block 403 and the motor body under test to prevent scratches or indentations on the surface of the body, and adaptively compensate for the dimensional tolerance of the motor body to ensure that motors of different specifications receive uniform clamping force.

[0057] In this embodiment, an extended detection plate 3 is also slidably connected to one side of the placement platform 1, specifically in conjunction with... Figure 1 and Figure 4 As shown, the extended detection plate 3 is equipped with a rotor positioning rod 5, which is an electrically controlled telescopic rod. The bottom of the electrically controlled telescopic rod is fixedly connected to the extended detection plate 3 by bolts. The output shaft of the electrically controlled telescopic rod is detachably connected to a rotating frame 6. The rotating frame 6 is equipped with a rotor clamping assembly 7 for clamping the rotor of the motor under test (the height adjustment function of the electrically controlled telescopic rod can flexibly adjust the vertical position according to the rotor shaft height of different models of motors under test). The rotor clamping assembly 7 includes a lockable and adjustable three-jaw self-centering chuck 701. The three-jaw self-centering chuck 701 includes a chuck body, three jaws are slidably installed on the chuck body, and a spiral groove plate is provided in the chuck body. A bevel gear meshes at the bottom of the spiral groove plate (the rotation of the bevel gear can drive the rotation of the spiral groove plate to convert into synchronous linear displacement of the three jaws along the radial direction of the chuck body). An adjustment groove is opened on the bevel gear that penetrates the chuck body (the rotational power of the bevel gear is applied by rotating a tool in the adjustment groove to realize the adjustment of the jaws). The chuck body and the rotating frame 6 are rotatably connected by bearings.

[0058] After the power supply unit 2 powers on the motor under test, the chuck body rotates synchronously with the rotor of the motor under test. Specifically, the chuck body is equipped with a first photoelectric emitting component for transmitting a rotor position indicator signal representing the motor under test, as detailed below. Figure 4 As shown, the first photoelectric emitting component includes symmetrical first laser emitters 8, each of which is embedded in the chuck body. The line connecting the two first laser emitters 8 passes through the center point of the chuck body. The positions of the two first laser emitters 8 are defined, and combined with the coaxial clamping and positioning characteristics of the chuck body on the rotor output shaft, it is ensured that the two first laser emitters 8 are always centrally symmetrically distributed about the rotor rotation axis. This ensures that their emitted signals reflect the true rotational phase and overall position characteristics of the rotor of the motor under test, providing a stable and reliable position reference support for subsequent rotor vibration signal phase matching, fault feature extraction, and condition assessment.

[0059] Based on this, a vertical baffle 9 is welded to the side of the extended detection plate 3 away from the placement platform 1. A photoelectric receiving component is vertically slidably connected to the vertical baffle 9 to receive two-dimensional coordinate data of the rotor position identification signal and record the motion trajectory of the corresponding identification point. The photoelectric receiving component includes a two-dimensional surface PSD receiving plate 10. Furthermore, a data processor is installed on the side of the vertical baffle 9 away from the extended detection plate 3. The specific data processing is as follows: Figure 6 As shown:

[0060] The data processor collects continuous two-dimensional coordinate data of the projected light points of two symmetrical laser emitters in real time through the two-dimensional surface PSD receiving board 10 (the original data includes ambient light interference (±0.05mm random noise) and circuit noise (±0.02mm DC offset)). The continuous two-dimensional coordinate data is denoised and filtered to remove ambient light interference and circuit noise (using moving average filtering (window size=5) to remove random noise). Then, the continuous coordinate points after denoising are identified and connected to form a light point trajectory based on the continuous two-dimensional coordinate data. Based on the coaxial positioning characteristics of the chuck body and the symmetrical first laser emitter 8, the stable circular trajectory of the symmetrical light point under ideal vibration-free conditions is used as a benchmark. The offset of the light point in the actual collected trajectory is compared to extract the vibration displacement components of the rotor in the radial and axial directions. The coordinate changes of the two symmetrical light point trajectories are then used for complementary verification to offset system errors such as installation eccentricity. Finally, the amplitude, frequency and phase characteristic signals of rotor vibration are accurately obtained, providing reliable dynamic detection data support for motor rotor fault diagnosis.

[0061] Furthermore, this method of acquiring the light spot trajectory of the rotor rotation of the motor under test can also determine the rotor rotation period by the periodic repetition interval of the position features in the light spot trajectory, and then calculate the real-time speed.

[0062] Furthermore, a unique feature is that the data processor signal is connected to a second photoelectric emitting component, specifically combined with... Figure 1 and Figure 5 As shown, the second photoelectric emitting component includes a rigid clamp 11 and a second laser emitter 12. The second laser emitter 12 is fixedly connected to the rigid clamp 11 by screws. The rigid clamp 11 is clamped onto the output shaft protrusion of the housing of the motor under test. Based on this, the vibration signal of the motor under test housing is compensated for the vibration signal of the motor under test rotor. The specific data processing process is as follows:

[0063] The data processor first timestamps the rotor position identification signal data and the machine body position identification signal data using a time synchronization algorithm. Then, using the two-dimensional coordinates of the machine body position identification signal as a reference, it calculates the relative motion trajectory of the rotor of the motor under test relative to its machine body (eliminating the interference component of the overall vibration of the motor body caused by flexible clamping on the rotor trajectory). Subsequently, it performs geometric shape fitting and frequency domain feature extraction (such as Fourier transform) on the relative motion trajectory of the rotor of the motor under test. If the trajectory shows periodic eccentric offset or irregular fluctuation, it is determined that the rotor has a real imbalance fault (i.e., polarization phenomenon, which can eliminate misjudgment caused by machine body vibration). Finally, it performs quantitative analysis based on the amplitude, frequency, and phase characteristics of the relative motion trajectory of the rotor of the motor under test, and outputs the fault diagnosis result of the rotor imbalance degree.

[0064] In actual testing of motor performance and fault detection, if the platform supporting the motor (i.e., the placement platform 1 functional component described in this embodiment) is unbalanced, it can cause the motor or platform to tilt or vibrate without being caused by the rotor's own operation. This contaminates the vibration signal, making it impossible to accurately reflect the rotor's true operating state and fault characteristics. Therefore, specifically in conjunction with... Figure 1 and Figure 2 As shown, in this embodiment, several support components for adjusting the flatness of the placement platform 1 are provided at the bottom of the placement platform 1. Each support component includes an electric lifting foot 20, the top of which is hinged to the bottom surface of the placement platform 1. Each electric lifting foot 20 integrates a pressure sensor. Several pressure sensors and electric lifting feet 20 are connected to a data processor. The specific process of adjusting the placement platform 1 based on the pressure sensor data is as follows: Figure 6 As shown:

[0065] The data processor receives pressure data transmitted from each pressure sensor, analyzes the pressure deviation of the support points corresponding to each electric lifting foot 20 based on several pressure data points, and calculates the height compensation amount for the corresponding electric lifting foot 20 based on the pressure deviation (for example, if the pressure exceeds a preset equalization threshold, the corresponding lifting foot is controlled to lower to reduce the support pressure; if the pressure is below the threshold, it is controlled to raise to increase the support pressure). It then sends a lifting control signal corresponding to the pressure deviation to each electric lifting foot 20. This design, which dynamically adjusts the height of each electric lifting foot 20 based on pressure deviation, achieves the effect of automatically balancing the pressure distribution of each support point, quickly eliminating the static imbalance of the placement platform 1 due to initial installation tilt, and preventing the tilt of the placement platform 1 from causing positional offsets in laser transmission and reception between the first laser emitter 8 and the second laser emitter 12 and the two-dimensional surface PSD receiving plate 10. This improves the accuracy of the data processor in calculating rotor speed and extracting vibration characteristics.

[0066] Example 2:

[0067] As attached Figure 4 and Figure 6 As shown, the difference from Embodiment 1 is that, in order to ensure that the laser signal emitted by the symmetrically arranged first laser emitter 8 can be accurately projected onto the preset coordinate receiving area of ​​the two-dimensional surface PSD receiving plate 10, and to eliminate the distortion of rotor position identification signal acquisition caused by the vertical position offset of the two; the sliding connection between the two-dimensional surface PSD receiving plate 10 and the vertical baffle 9 in Embodiment 1 includes a height adjustment groove 13 opened on the vertical baffle 9, and a support block 14 is slidably connected in the height adjustment groove 13. The two-dimensional surface PSD receiving plate 10 is embedded in the support block 14 on the side near the placement platform 1.

[0068] The vertical baffle 9 has an adjustment groove 15 corresponding to the length of the height adjustment slide 13. A ball screw component 16 is installed within the adjustment groove 15. The ball nut of the ball screw component 16 is fixedly connected to the bearing block 14. A second motor 17 is bolted to the top of the vertical baffle 9. The output shaft of the second motor 17 is coaxially fused with the threaded rod of the ball screw component 16. The second motor 17 is signal-connected to the data processor. The specific processing procedure for the data processor to control the vertical height position of the two-dimensional surface PSD receiving board 10 through the signal from the second motor 17 is as follows:

[0069] The data processor acquires in real time the receiving coordinates of the rotor position identification signal emitted by the symmetrically set first laser emitter 8 on the two-dimensional surface PSD receiving plate 10, and compares these coordinates with the preset center coordinates of the two-dimensional surface PSD receiving plate 10 to calculate the vertical deviation value. Then, based on the deviation value, it sends a control command to the second motor 17 to make the center of the two-dimensional surface PSD receiving plate 10 face the detection area of ​​the rotor of the motor under test. After receiving the control command, the second motor 17 drives the threaded rod of the ball screw component 16 to rotate, which drives the bearing block 14 fixedly connected to the ball nut to slide vertically along the height adjustment groove 13 until the receiving coordinates of the symmetrical rotor position identification signal coincide with the center coordinates of the two-dimensional surface PSD receiving plate 10, thereby ensuring that the center of the two-dimensional surface PSD receiving plate 10 faces the detection area of ​​the rotor of the motor under test.

[0070] Example 3:

[0071] As attached Figure 2 , Figure 3 and Figure 4 As shown, the difference from Embodiment 2 is that the sliding connection between the extended detection plate 3 and the placement platform 1 includes several telescopic grooves 18 formed within the placement platform 1. Symmetrical extension rods 19 are fixedly connected to the side of the extended detection plate 3 closest to the placement platform 1, and the extension rods 19 slide within their respective telescopic grooves 18. This sliding connection design, compared to conventional sliding connections (such as single guide rods or asymmetrical groove structures), provides more stable symmetrical guiding constraints during the sliding process of the extended detection plate 3. This ensures that the extended detection plate 3 maintains a precise coaxial correspondence with the rotor positioning rod 5 when it moves the vertical baffle 9, preventing the relative position between the photoelectric receiving component on the vertical baffle 9 and the rotor position marker from shifting due to sliding gaps or guiding deviations. This ensures the accuracy of the rotor coordinate data collected by the two-dimensional surface PSD receiving plate 10, further improving the reliability and accuracy of rotor speed and vibration signal detection.

[0072] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for rapid detection of motor performance and faults, comprising a placement platform (1), wherein a power supply component (2) for power-on detection of the motor under test is disposed at the bottom of the placement platform (1), characterized in that, An extension detection plate (3) is slidably connected to one side of the placement platform (1), and a body clamping assembly (4) for clamping the motor to be tested is provided on the side of the placement platform (1) away from the extension detection plate (3). The extended detection plate (3) is fixedly connected to a rotor positioning rod (5), and the top of the rotor positioning rod (5) is rotatably connected to a rotor clamping assembly (7) for clamping the rotor of the motor under test. After the power supply unit (2) powers on the motor under test, the rotor clamping assembly (7) rotates synchronously with the rotation of the rotor of the motor under test. A first photoelectric transmitting component for transmitting a rotor position identification signal representing the motor under test is fixedly connected to the rotor clamping assembly (7). A vertical baffle (9) is fixedly connected to the side of the extended detection plate (3) away from the placement platform (1). A photoelectric receiving component for receiving two-dimensional coordinate data of the rotor position identification signal and recording the motion trajectory of the identification point corresponding to the identification signal is vertically slidably connected to the vertical baffle (9). A data processor is installed on the side of the vertical baffle (9) away from the extended detection plate (3). The data processor receives the two-dimensional coordinate position data of the identification point transmitted by the photoelectric receiving component in real time and calculates the real-time speed of the rotor of the motor under test by periodic analysis of the motion trajectory of the identification point. The data processor is connected to a second photoelectric transmitter, which is installed on the motor under test. The second photoelectric transmitter is used to transmit a body position identification signal representing the motor under test. Based on the two-dimensional coordinates of the body position identification signal, the data processor corrects the motion trajectory of the corresponding identification point of the rotor position identification signal and outputs the rotor position fault diagnosis result of the motor under test.

2. The rapid detection device for motor performance and faults according to claim 1, characterized in that, The body clamping assembly (4) includes a clamping plate (401) fixedly connected to the placement platform (1). The clamping plate (401) has symmetrical clamping grooves (402) on the side near the placement platform (1). Clamping blocks (403) are slidably connected in the clamping grooves (402). The clamping plate (401) is provided with clamping drive components for driving the symmetrical clamping blocks (403) to move closer to each other or further away from each other. The clamping blocks (403) are all fixedly connected to an elastic layer (408) on one side of each other.

3. The rapid detection device for motor performance and faults according to claim 2, characterized in that, The clamping drive includes a first motor (404) and a circular rotating disk (405). The first motor (404) is fixedly connected to the side of the clamping plate (401) away from the placement platform (1). The output end of the first motor (404) passes through the clamping plate (401) and is fixedly connected to the center of the circular rotating disk (405). The two sides of the circular rotating disk (405) are symmetrically fixedly connected with connecting rod groups. The side of the connecting rod group away from the circular rotating disk (405) is respectively hinged to the corresponding clamping block (403). The connecting rod groups are used to combine with the clamping slide (402) to convert the rotation of the circular rotating disk (405) into the sliding displacement of the corresponding clamping block (403) along the clamping slide (402).

4. The rapid detection device for motor performance and faults according to claim 3, characterized in that, The rotor positioning rod (5) is an electrically controlled telescopic rod. The bottom of the electrically controlled telescopic rod is fixedly connected to the extension detection plate (3). The output shaft of the electrically controlled telescopic rod is detachably connected to the rotating frame (6). The rotor clamping assembly (7) is rotatably connected to the rotating frame (6).

5. The rapid detection device for motor performance and faults according to claim 4, characterized in that, The rotor clamping assembly (7) includes a lockable and adjustable three-jaw self-centering chuck (701), which is rotatably connected to the rotating frame (6).

6. The rapid detection device for motor performance and faults according to claim 5, characterized in that, The first photoelectric emission component includes symmetrical first laser emitters (8), each of which is fixedly connected to a three-jaw self-centering chuck (701), and the line connecting the two first laser emitters (8) passes through the center point of the three-jaw self-centering chuck (701). The photoelectric receiving component includes a two-dimensional surface PSD receiving plate (10); The second photoelectric emission assembly includes a rigid clamp (11) and a second laser emitter (12). The second laser emitter (12) is fixedly connected to the rigid clamp (11), and the rigid clamp (11) is clamped on the output shaft protrusion of the housing of the motor under test.

7. The rapid detection device for motor performance and faults according to claim 6, characterized in that, The specific data processing for the rotor position fault diagnosis results of the motor under test output by the data processor is as follows: The data processor first timestamps the rotor position identification signal data and the machine body position identification signal data using a time synchronization algorithm. Then, using the two-dimensional coordinates of the machine body position identification signal as a reference, it calculates the relative motion trajectory of the rotor of the motor under test relative to its machine body. Subsequently, it performs geometric shape fitting and frequency domain feature extraction on the relative motion trajectory of the rotor of the motor under test. If the trajectory shows periodic eccentricity or irregular fluctuations, it is determined that the rotor has a real imbalance fault. Finally, it performs quantitative analysis based on the amplitude, frequency, and phase characteristics of the relative motion trajectory of the rotor of the motor under test, and outputs the fault diagnosis result of the rotor imbalance degree.

8. The rapid detection device for motor performance and faults according to claim 7, characterized in that, The sliding connection between the two-dimensional PSD receiving plate (10) and the vertical baffle (9) includes a height adjustment groove (13) opened on the vertical baffle (9), and a support block (14) is slidably connected in the height adjustment groove (13). The two-dimensional PSD receiving plate (10) is embedded in the support block (14) on the side close to the placement platform (1). The vertical baffle (9) is provided with an adjustment groove (15) corresponding to the length of the height adjustment slide (13). The adjustment groove (15) is provided with a ball screw component (16). The ball nut of the ball screw component (16) is fixedly connected to the bearing block (14). The top of the vertical baffle (9) is fixedly connected with a second motor (17). The output shaft of the second motor (17) is fixedly connected to the threaded rod of the ball screw component (16) on the same axis. The second motor (17) is connected to the data processor signal. The data processor acquires the receiving coordinates of the rotor position identification signal emitted by the symmetrically set first laser emitter (8) on the two-dimensional surface PSD receiving plate (10) in real time, and compares the coordinates with the preset center coordinates of the two-dimensional surface PSD receiving plate (10) to calculate the vertical deviation value. Then, according to the deviation value, it sends a control command to the second motor (17) so that the center of the two-dimensional surface PSD receiving plate (10) is aligned with the detection area of ​​the rotor of the motor under test.

9. The rapid detection device for motor performance and faults according to claim 8, characterized in that, The sliding connection between the extended detection plate (3) and the placement platform (1) includes several telescopic grooves (18) opened in the placement platform (1). The side of the extended detection plate (3) near the placement platform (1) is fixedly connected with symmetrical extension rods (19), and the extension rods (19) slide in the corresponding telescopic grooves (18).

10. The rapid detection device for motor performance and faults according to claim 9, characterized in that, The bottom of the placement platform (1) is provided with several support components for adjusting the flatness of the placement platform (1); All support components include electric lifting feet (20), the top of which is hinged to the bottom surface of the placement platform (1), and each electric lifting foot (20) has a pressure sensor integrated inside. Several pressure sensors and electric lifting feet (20) are connected to the data processor signal. The data processor receives the pressure data transmitted by each pressure sensor, analyzes the pressure deviation of the support point corresponding to each electric lifting foot (20) based on several pressure data, calculates the height compensation amount of the corresponding electric lifting foot (20) based on the pressure deviation, and sends the corresponding lifting control signal of the pressure deviation to each electric lifting foot (20).

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