A kind of gear reduction motor gear wear detection device and detection method

Abstract

The invention discloses a gear wear detection device for a reduction motor. The device is provided with a reduction motor, a gear meshing sound detection module, a transmission shaft vibration collection module and a gyroscope Bluetooth module. The gear meshing sound detection module is provided with a sound broadcasting device, a first sound collecting device, a second sound collecting device and a third sound collecting device; the transmission shaft vibration collection module is provided with a sound attenuation device. The invention provides a cup-shaped sound collecting device at each gear meshing position and connects the cup-shaped sound broadcasting device provided with an acoustic emission sensor through a tube, thereby improving the detection accuracy and realizing comprehensive monitoring of the wear state of the gears. The gyroscope is integrated to perform angular velocity detection on the transmission shaft to cooperate with the detection of the acoustic emission sensor and the vibration sensor. The multi-sensor fusion is used to improve the detection accuracy and avoid the instantaneous error of a single sensor.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of industrial detection equipment, and in particular to a reduction motor gear wear detection device. Background Art

[0002] Gear motors have a wide range of applications in industry, mainly for various types of transmissions. Gear motors also have their service life and load-bearing capacity. In industrial production, it often happens that the wear state of the gears of the gear motors is not detected in time, resulting in a decline in production quality and economic losses. Gears are prone to fatigue damage when used at high speed for a long time; the motor output shaft is overloaded, and the gears are subjected to huge power and resistance, resulting in gear wear or deformation.

[0003] Patent No. 201811545800.6 simply sets up a few sensors to detect motor bearing defects without strictly arranging the detection sensors, which will lead to large distortion of the collected raw data. Even if algorithm fitting is used, a large amount of raw data with large deviations not only consumes the processor's memory, but the fitted data still has a certain deviation from the real data, which is not conducive to the true representation of the wear status of the parts. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a reduction motor gear wear detection device.

[0005] Technical solution: To achieve the above-mentioned purpose, a gear reduction motor gear wear detection device of the present invention is characterized by: a gear reduction motor, a gear meshing sound detection module, a transmission shaft vibration collection module and a gyroscope Bluetooth module, a detection and analysis module, the gear meshing sound detection module is provided with a sound broadcasting device, a first sound collection device, a second sound collection device, and a third sound collection device; the transmission shaft vibration collection module is provided with a sound attenuation device;

[0006] The transmission shaft vibration collection module is also provided with an acoustic emission sensor, which is arranged above the second rotating shaft and fixed to the left surface of the shaft cover; the sound broadcasting device is arranged on the left side of the acoustic emission sensor, and the first sound collecting device is arranged on the right side of the meshing portion of the first gear and the second gear; the second sound collecting device is arranged on the right side of the meshing portion of the third gear and the fourth gear; the third sound collecting device is arranged on the left side of the meshing portion of the fifth gear and the sixth gear; the sound broadcasting device is respectively connected to the first sound collecting device, the second sound collecting device, and the third sound collecting device;

[0007] The transmission shaft vibration collection module is also provided with a vibration sensor, the sound reduction device is provided at the right end of the third rotating shaft, and the vibration sensor is provided on the right side of the sound reduction device;

[0008] The gyroscope Bluetooth module is provided with a first gyroscope and a second gyroscope. The first gyroscope is arranged on the right side of the third gear and located on the surface of the second rotating shaft; the second gyroscope is arranged on the left side of the fourth gear and located on the surface of the third rotating shaft. The gyroscope Bluetooth module is also provided with an attitude solver, a microprocessor, and wireless Bluetooth.

[0009] Furthermore, the reduction motor is provided with a base and a stator winding arranged on the inner surface of the base; a rotor is arranged in the middle of the base; a first rotating shaft is arranged in the middle of the rotor, and the rotor is fixedly connected to the first rotating shaft; bearings are arranged at both ends of the first rotating shaft, and the bearings are fixedly connected to the base; a first gear is arranged at the right end of the first rotating shaft; a second gear is arranged below the first gear, the first gear is meshed with the second gear, a second rotating shaft is arranged in the middle of the second gear, and the left end of the second rotating shaft is embedded in the right surface of the base; a third gear is arranged on the right side of the second gear, and the third gear and the second rotating shaft are on the same axis.

[0010] Furthermore, a shaft cover is provided at the right end of the second rotating shaft, and the right side of the second rotating shaft is embedded in the left surface of the shaft cover; a fourth gear is provided above the third gear; a third rotating shaft is provided in the middle of the fourth gear, and the left end of the third rotating shaft is embedded in the right surface of the machine base; a second bracket is provided on the right side of the fourth gear, and the third rotating shaft passes through the through hole of the second bracket; a third bracket is provided above the second bracket; a fifth gear is provided on the right side of the second bracket; a sixth gear is provided below the fifth gear; a fourth rotating shaft is provided in the middle of the sixth gear, the left end of the fourth rotating shaft is embedded in the right surface of the second bracket, and the right end of the fourth rotating shaft passes through the through hole of the shaft cover, the third gear is meshed with the fourth gear, and the fifth gear is meshed with the sixth gear.

[0011] Furthermore, a hole is provided on the left end surface of the sound attenuation device, and foam is provided in the hole.

[0012] Furthermore, the detection method of the reduction motor gear wear detection device comprises the following steps:

[0013] A. Gear meshing sound detection module detection method: The cup mouths of the first sound collecting device, the second sound collecting device, and the third sound collecting device are all facing the gear meshing part, and the cup mouth of the sound broadcasting device is facing the acoustic emission sensor. The gear meshing will cause air vibration to form sound. The divergent sound will enter the cup cavity of the first sound collecting device, the second sound collecting device, and the third sound collecting device, and then be transmitted to the cup-shaped cavity of the sound broadcasting device, and then be detected by the acoustic emission sensor;

[0014] B. Working method of the sound attenuation device: some noise is absorbed through the holes set in the sound attenuation device, and the end surface of the sound attenuation device gradually becomes smaller from left to right, which also weakens the transmission of noise, making the vibration signal detected by the vibration sensor more stable and clear;

[0015] C. Working method of vibration sensor: The vibration sensor is a capacitive accelerometer vibration measuring instrument, which adopts the variable capacitance principle, that is, when the sensitive element is offset by the vibration acceleration, it will cause the capacitance to change proportionally. The change in capacitance is the frequency of vibration;

[0016] D. Working steps of the gyroscope Bluetooth module: The first gyroscope and the second gyroscope collect angular acceleration, process it into usable angular velocity through the attitude solver and microprocessor, and then send the data through the wireless Bluetooth connected to the microprocessor.

[0017] Further, the detection and analysis steps are as follows:

[0018] 1. The sensitivity value detected by the acoustic emission sensor in the gear meshing sound detection module is uploaded to the detection and analysis module;

[0019] 2. The vibration sensor uploads the detected frequency value to the detection and analysis module;

[0020] 3. The gyroscope Bluetooth module uploads the processed angular velocity value to the detection and analysis module;

[0021] 4. The detection and analysis module uses the algorithm fitting operation to collect data from the acoustic emission sensor, vibration sensor and gyroscope Bluetooth module, draws a curve graph based on the operation results, compares and analyzes the curve graph with the initial curve graph, and outputs the analysis and prediction results.

[0022] The beneficial effects of the present invention are:

[0023] 1. The invention provides a cup-shaped sound collecting device at each gear meshing position and connects the cup-shaped sound broadcasting device provided with an acoustic emission sensor to each other through a tube, thereby improving the detection accuracy and realizing comprehensive monitoring of the wear status of the gears.

[0024] 2. The present invention selects to install a conical sound attenuation device at the end of the shaft of the middle transition of the reduction motor, and sets a vibration sensor at the end of the sound attenuation device, so as to minimize the influence of the transmission of noise on the real vibration state of the shaft and improve the accuracy of monitoring the vibration state of the shaft.

[0025] 3. The present invention also integrates a gyroscope to detect the angular velocity of the transmission shaft to cooperate with the detection of the acoustic emission sensor and the vibration sensor. The multi-sensor fusion is used to improve the accuracy of the detection and avoid the instantaneous error of a single sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 This is one of the overall internal structure schematic diagrams of a reduction motor gear wear detection device according to this embodiment;

[0027] Attached Figure 2 This is the second schematic diagram of the overall internal structure of a reduction motor gear wear detection device according to this embodiment;

[0028] Attached Figure 3 This is a schematic diagram of the structure of a gear meshing sound detection module of a gear reduction motor gear wear detection device according to this embodiment;

[0029] Attached Figure 4 This is a schematic diagram of the structure of a transmission shaft vibration collection module of a reduction motor gear wear detection device in this embodiment.

[0030] In the figure: 1-base; 2-stator winding; 3-rotor; 4-first rotating shaft; 5-bearing; 6-first gear; 7-second gear; 8-second rotating shaft; 9-third gear; 10-first gyroscope; 11-first bracket; 12-fourth gear; 13-third rotating shaft; 14-second gyroscope; 15-fifth gear; 16-vibration sensor; 17-second bracket; 18-fourth rotating shaft; 19-sixth gear; 20-third bracket; 21-shaft cover; 22-acoustic emission sensor; 23-sound broadcasting device; 24-first sound collecting device; 25-second sound collecting device; 26-third sound collecting device; 27-sound attenuation device; 28-hole; 100-reduction motor; 101-gear meshing sound detection module; 102-transmission shaft vibration collection module; 103-gyroscope Bluetooth module 103. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Examples, such as Figure 1-4 The present invention shows a gear wear detection device for a reduction motor, which is provided with a reduction motor 100, a gear meshing sound detection module 101, a transmission shaft vibration collection module 102 and a gyroscope Bluetooth module 103. The gear meshing sound detection module 101 is provided with a sound broadcasting device 23, a first sound collecting device 24, a second sound collecting device 25 and a third sound collecting device 26; the transmission shaft vibration collection module 102 is provided with a sound attenuation device 27.

[0033] The transmission shaft vibration collection module 102 is also provided with an acoustic emission sensor 22, which is arranged above the second rotating shaft 8 and fixed to the left surface of the shaft cover 21; the sound broadcasting device 23 is arranged on the left side of the acoustic emission sensor 22, and the first sound collecting device 24 is arranged on the right side of the meshing position of the first gear 6 and the second gear 7; the second sound collecting device 25 is arranged on the right side of the meshing position of the third gear 9 and the fourth gear 12; the third sound collecting device 26 is arranged on the left side of the meshing position of the fifth gear 15 and the sixth gear 19; the sound broadcasting device 23 is respectively connected to a sound collecting device 24, a second sound collecting device 25, and a third sound collecting device 26; the sound broadcasting device 23, the first sound collecting device 24, the second sound collecting device 25, and the third sound collecting device 26 are all cup-shaped.

[0034] The transmission shaft vibration collection module 102 is further provided with a vibration sensor 16 . The sound reduction device 27 is arranged at the right end of the third rotating shaft 13 , and the vibration sensor 16 is arranged on the right side of the sound reduction device 27 .

[0035] The gyroscope Bluetooth module 103 is provided with a first gyroscope 10 and a second gyroscope 14. The first gyroscope 10 is arranged on the right side of the third gear 9 and is located on the surface of the second rotating shaft 8; the second gyroscope 14 is arranged on the left side of the fourth gear 12 and is located on the surface of the third rotating shaft 13. The gyroscope Bluetooth module 103 also includes an attitude solver, a microprocessor and wireless Bluetooth.

[0036] Preferably, the gyro Bluetooth module 103 is a Witt intelligent nine-axis Bluetooth gyro sensor BWT901CL.

[0037] The reduction motor 100 is provided with a base 1 and a stator winding 2 arranged on the inner surface of the base 1; a rotor 3 is arranged in the middle of the base 1; a first rotating shaft 4 is arranged in the middle of the rotor 3, and the rotor 3 is fixedly connected to the first rotating shaft 4; bearings 5 ​​are arranged at both ends of the first rotating shaft 4, and the bearings 5 ​​are fixedly connected to the base 1; a first gear 6 is arranged at the right end of the first rotating shaft 4; a second gear 7 is arranged below the first gear 6, and the first gear 6 is meshed and connected with the second gear 7, a second rotating shaft 8 is arranged in the middle of the second gear 7, and the left end of the second rotating shaft 8 is embedded in the right surface of the base 1; a third gear 9 is arranged on the right side of the second gear 7, and the third gear 9 and the second rotating shaft 8 are on the same axis.

[0038] A shaft cover 21 is provided at the right end of the second rotating shaft 8, and the right side of the second rotating shaft 8 is embedded in the left surface of the shaft cover 21; a fourth gear 12 is provided above the third gear 9; a third rotating shaft 13 is provided in the middle of the fourth gear 12, and the left end of the third rotating shaft 13 is embedded in the right surface of the machine base 1; a second bracket 17 is provided on the right side of the fourth gear 12, and the third rotating shaft 13 passes through the through hole of the second bracket 17; a third bracket 20 is provided above the second bracket 17; a fifth gear 15 is provided on the right side of the second bracket 17; a sixth gear 19 is provided below the fifth gear 15; a fourth rotating shaft 18 is provided in the middle of the sixth gear 19, the left end of the fourth rotating shaft 18 is embedded in the right surface of the second bracket 17, and the right end of the fourth rotating shaft 18 passes through the through hole of the shaft cover 21, the third gear 9 is meshed and connected with the fourth gear 12, and the fifth gear 15 is meshed and connected with the sixth gear 19.

[0039] The left end surface of the sound reduction device 27 is provided with a plurality of honeycomb pentagonal holes 28 , and foam is arranged in the holes 28 .

[0040] The working method of the device is as follows:

[0041] Detection principle of the gear meshing sound detection module 101: one end of the cup mouth of the first sound collecting device 24, the second sound collecting device 25, and the third sound collecting device 26 are all facing the gear meshing part, and the cup mouth of the sound broadcasting device 23 is facing the acoustic emission sensor 22. The gear meshing will cause air vibration to form sound. The divergent sound will enter the cup cavity of the first sound collecting device 24, the second sound collecting device 25, and the third sound collecting device 26, and then be transmitted to the cup-shaped cavity of the sound broadcasting device 23, and then be detected by the acoustic emission sensor 22;

[0042] The working method of the sound attenuation device is as follows: the holes 28 provided in the sound attenuation device 27 are used to absorb some noises, and the end surface of the sound attenuation device 27 gradually becomes smaller from left to right, and the transmission of noises is also weakened, so that the vibration signal detected by the vibration sensor 16 becomes more stable and clear;

[0043] Working method of vibration sensor: The vibration sensor 16 is a capacitive accelerometer vibration measuring instrument, which adopts the variable capacitance principle, that is, when the sensitive element is offset by the vibration acceleration, it will cause the capacitance to change proportionally, and the change in capacitance is the frequency of vibration.

[0044] Working method of gyroscope Bluetooth module: the first gyroscope 10 and the second gyroscope 14 collect angular acceleration, process it into usable angular velocity through the attitude solver and the microprocessor, and then send data through the wireless Bluetooth connected to the microprocessor. When the external Bluetooth receiving module is connected to the wireless Bluetooth of the gyroscope Bluetooth module, the data can be obtained.

[0045] The detection and analysis steps are as follows:

[0046] 1. The sensitivity value detected by the acoustic emission sensor in the gear meshing sound detection module is uploaded to the detection and analysis module;

[0047] 2. The vibration sensor uploads the detected frequency value to the detection and analysis module;

[0048] 3. The gyroscope Bluetooth module uploads the processed angular velocity value to the detection and analysis module;

[0049] 4. The detection and analysis module uses the algorithm to fit the data collected by the acoustic emission sensor, vibration sensor and gyroscope Bluetooth module, draws a curve graph based on the calculation results, compares and analyzes the curve graph with the first curve graph, and outputs the analysis and prediction results.

[0050] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gear reduction motor gear wear detection device, characterized in that: It is equipped with a reduction motor, a gear meshing sound detection module, a transmission shaft vibration collection module, a gyroscope Bluetooth module, and a detection and analysis module. The gear meshing sound detection module is equipped with a sound broadcasting device, a first sound collection device, a second sound collection device, and a third sound collection device; the transmission shaft vibration collection module is equipped with a sound attenuation device; The transmission shaft vibration collection module is also provided with an acoustic emission sensor, which is arranged above the second rotating shaft and fixed to the left surface of the shaft cover; the sound broadcasting device is arranged on the left side of the acoustic emission sensor, and the first sound collecting device is arranged on the right side of the meshing portion between the first gear and the second gear; The second sound collecting device is arranged on the right side of the meshing portion between the third gear and the fourth gear; The third sound collecting device is arranged on the left side of the meshing portion between the fifth gear and the sixth gear; the sound broadcasting device is respectively connected to the first sound collecting device, the second sound collecting device and the third sound collecting device; The transmission shaft vibration collection module is also provided with a vibration sensor, the sound reduction device is provided at the right end of the third rotating shaft, and the vibration sensor is provided on the right side of the sound reduction device; The gyroscope Bluetooth module is provided with a first gyroscope and a second gyroscope. The first gyroscope is arranged on the right side of the third gear and located on the surface of the second rotating shaft; the second gyroscope is arranged on the left side of the fourth gear and located on the surface of the third rotating shaft. The gyroscope Bluetooth module is also provided with an attitude solver, a microprocessor, and wireless Bluetooth.

2. According to claim 1, a gear reduction motor gear wear detection device is characterized in that: The reduction motor is provided with a base and a stator winding arranged on the inner surface of the base; a rotor is arranged in the middle of the base; a first rotating shaft is arranged in the middle of the rotor, and the rotor is fixedly connected to the first rotating shaft; bearings are arranged at both ends of the first rotating shaft, and the bearings are fixedly connected to the base; a first gear is arranged at the right end of the first rotating shaft; a second gear is arranged below the first gear, and the first gear is meshed with the second gear, a second rotating shaft is arranged in the middle of the second gear, and the left end of the second rotating shaft is embedded in the right surface of the base; a third gear is arranged on the right side of the second gear, and the third gear and the second rotating shaft are on the same axis.

3. A gear reduction motor wear detection device according to claim 2, characterized in that: A shaft cover is provided at the right end of the second rotating shaft, and the right side of the second rotating shaft is embedded in the left surface of the shaft cover; a fourth gear is provided above the third gear; a third rotating shaft is provided in the middle of the fourth gear, and the left end of the third rotating shaft is embedded in the right surface of the machine base; a second bracket is provided on the right side of the fourth gear, and the third rotating shaft passes through the through hole of the second bracket; a third bracket is provided above the second bracket; a fifth gear is provided on the right side of the second bracket; a sixth gear is provided below the fifth gear; a fourth rotating shaft is provided in the middle of the sixth gear, the left end of the fourth rotating shaft is embedded in the right surface of the second bracket, and the right end of the fourth rotating shaft passes through the through hole of the shaft cover, the third gear is meshed and connected with the fourth gear, and the fifth gear is meshed and connected with the sixth gear.

4. A gear reduction motor wear detection device according to claim 3, characterized in that: The left end surface of the sound attenuation device is provided with a hole, and foam is arranged in the hole.

5. A detection method for implementing the gear wear detection device for a reduction motor according to any one of claims 1 to 4, characterized in that The following steps are involved: A. Gear meshing sound detection module detection steps: one end of the cup of the first sound collecting device, the second sound collecting device, and the third sound collecting device is facing the gear meshing part, and the cup of the sound broadcasting device is facing the acoustic emission sensor. The gear meshing will cause air vibration to form sound. The divergent sound will enter the cup cavity of the first sound collecting device, the second sound collecting device, and the third sound collecting device, and then be transmitted to the cup-shaped cavity of the sound broadcasting device, and then be detected by the acoustic emission sensor; B. Working steps of the sound attenuation device: some noise is absorbed through the holes set in the sound attenuation device, and the end surface of the sound attenuation device gradually becomes smaller from left to right, which also weakens the transmission of noise, making the vibration signal detected by the vibration sensor more stable and clear; C. Working steps of vibration sensor: Vibration sensor is a capacitive accelerometer vibration measuring instrument, which adopts variable capacitance principle, that is, when the sensitive element is offset by vibration acceleration, it will cause the capacitance to change proportionally, and the change of capacitance is the frequency of vibration; D. Working steps of the gyroscope Bluetooth module: The first gyroscope and the second gyroscope collect angular acceleration, process it into usable angular velocity through the attitude solver and the microprocessor, and then send the data through the wireless Bluetooth connected to the microprocessor.

6. The detection method according to claim 5, characterized in that: It specifically includes the following steps:

1. The sensitivity value detected by the acoustic emission sensor in the gear meshing sound detection module is uploaded to the detection and analysis module; 2. The vibration sensor uploads the detected frequency value to the detection and analysis module; 3. The gyroscope Bluetooth module uploads the processed angular velocity value to the detection and analysis module; 4. The detection and analysis module uses the algorithm fitting operation to collect data from the acoustic emission sensor, vibration sensor and gyroscope Bluetooth module, draws a curve graph based on the operation results, compares and analyzes the curve graph with the initial curve graph, and outputs the analysis and prediction results.

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