High-speed detection method and device for bearing ring grinding burn

Abstract

The present invention provides a high-speed detection method and device for bearing ring grinding burn. The detection method adopts a method in which a permanent magnet magnetization device is stationary and the bearing ring being tested rotates at high speed relative to the magnetization device to excite and generate a magnetic Barkhausen signal; the magnetic domains in the magnetization region produce magnetic domain movement under the relative motion of the permanent magnet magnetic field, wherein the displacement of the magnetic domain wall generates a magnetic Barkhausen signal, and the receiving coil receives the magnetic Barkhausen signal. The detection method of the present invention excites magnetic Barkhausen noise through the high-speed rotation relative motion of the permanent magnet and the bearing ring, eliminating the process of generating an alternating current and then a time-varying magnetic field through a signal generator and a power amplifier, thereby overcoming the defects of the current instruments in slow grinding burn detection speed, electromagnetic interference, and heat generation problems that are difficult to solve. In addition, the present invention also provides a high-speed detection device for bearing ring grinding burn based on permanent magnet excitation magnetic Barkhausen.

Description

Technical Field

[0001] The invention relates to a high-speed detection method and device for grinding and burning of a bearing ring. Background Art

[0002] Grind burn can reduce the service performance of bearing rings. The magnetic Barkhausen method is currently an important method for detecting grind burn in bearing rings. Currently available magnetic Barkhausen instruments primarily use a time-varying magnetic field to excite a magnetic Barkhausen signal to detect grind burn. Magnetic Barkhausen noise detection devices typically consist of a magnetizing unit and a signal receiving unit. The magnetizing unit is constructed from a multi-turn coil wound on a magnetic yoke, while the signal receiving unit typically uses a high-sensitivity coil. In operation, a magnetic Barkhausen instrument generates a time-varying excitation signal (typically a sinusoidal waveform) from a signal generator. This signal is amplified by a power amplifier and then passed through a coil wound on the yoke, creating a time-varying magnetic field. This magnetizes the workpiece under test and generates a magnetic Barkhausen signal. The signal receiving unit receives the magnetic Barkhausen signal and determines whether grind burn has occurred based on the root mean square (RMS) value of the received signal. This magnetization method requires a sufficiently high current to generate a sufficiently strong magnetic field, and the number of turns of the coil wound on the yoke also affects the strength of the magnetic field.

[0003] Existing magnetic Barkhausen detection methods typically use a time-varying magnetic field to excite a magnetic Barkhausen noise signal, which can cause heating of the excitation coil and electromagnetic interference. Furthermore, due to the low excitation frequency (typically 0.1 to 200 Hz), the response speed of the magnetic Barkhausen noise excited by the time-varying magnetic field is slow, resulting in slow detection speed. Summary of the Invention

[0004] Based on this, a high-speed detection method and device for bearing ring grinding burns were proposed. The magnetic Barkhausen noise was excited by the high-speed rotational relative motion of the permanent magnet and the bearing ring, eliminating the process of generating alternating current and then generating a time-varying magnetic field through a signal generator and a power amplifier. This overcomes the shortcomings of current instruments such as slow detection speed, electromagnetic interference, and difficult-to-solve heating problems.

[0005] In a first aspect, the present invention provides a high-speed detection method for bearing ring grinding burn, wherein a permanent magnet magnetizing device is stationary, while the bearing ring being tested rotates at high speed relative to the permanent magnet magnetizing device to generate a magnetic Barkhausen signal;

[0006] The magnetic domains in the magnetized region produce magnetic domain movement under the action of the relative movement of the permanent magnet's magnetic field, and the displacement of the magnetic domain wall generates the magnetic Barkhausen signal. The receiving coil receives the magnetic Barkhausen signal, and after passing through a signal amplifier and low-pass filtering, it can be converted into a digital magnetic Barkhausen signal through an acquisition card. The root mean square envelope of the digital magnetic Barkhausen signal is calculated as a judgment condition for ring burn. By monitoring whether the maximum value of the root mean square envelope of the digital magnetic Barkhausen signal is within a set range, it is determined whether the bearing ring has grinding burn.

[0007] Furthermore, the bearing ring is fixed by a permanent magnet magnetizing device, and the bearing ring is rotated at a high speed relative to the permanent magnet magnetizing device to generate the magnetic Barkhausen signal, which includes the following steps:

[0008] Step 1: The relative motion of the permanent magnet magnetic field and the raceway of the bearing ring is achieved by rotating the bearing at a constant speed and keeping the probe stationary. The permanent magnet magnetic field interacts with the magnetic domain inside the raceway of the bearing ring. The relative motion of the permanent magnet magnetic field and the raceway of the bearing ring induces a Barkhausen jump through the disturbance of the interaction. The bearing rotating device includes two driving wheels and a driven wheel for assisting rotation. The two driving wheels rotate at a constant speed to drive the bearing ring to rotate. The driven wheel has a spring-pressing structure. The driven wheel can press the bearing ring to prevent the bearing ring from shaking. When installing the bearing, pull apart the driven wheel and place the bearing ring above the two driving wheels. Release the driven wheel to ensure that the spring-pressing structure of the driven wheel is in a stretched state.

[0009] Step 2: The probe used for detection is a probe that integrates a permanent magnet yoke and a signal receiving coil. The signal receiving coil adopts a linear array coil to achieve full coverage scanning of the bearing ring. The lower end surface of the bearing ring and the lower surface of the pin of the permanent magnet yoke are in the same plane. The probe is provided with a spring pressure structure. The number of detection coils of the probe is not less than , the result is rounded down, L is the width of the bearing ring, To detect the outer diameter of the coil, the probe is pressed before testing so that the wedge-shaped end of the probe is in a compressed state. The probe can achieve two magnetization modes: local magnetization along the circumference of the raceway and local magnetization along the axial direction.

[0010] Step 3: Use the encoder to detect the rotation angle of the driven wheel to control the sampling point distance interval to achieve equal space sampling. The single sampling rotation angle is the rotation angle of the driven wheel per rotation. The angle is sampled once, and the sampling points are spaced at most , is the outer diameter of the receiving coil, and the rotation angle of the driving wheel is , is the effective rotation radius of the driven wheel;

[0011] Step 4: Use the same size of grinding, tempering and burning bearing rings and non-grinding and burning bearing rings as comparison to determine the optimal magnetic Barkhausen detection sensitivity speed, and take the maximum value of the root mean square envelope of the digital magnetic Barkhausen signal of grinding, tempering and burning at the same speed as the reference value. The average value of the RMS envelope of the digital magnetic Barkhausen signal with no grinding burn Ratio As the basis for determining the sensitivity of magnetic Barkhausen detection, different ratios are obtained by changing the speed of the driving wheel. ,ratio The larger the value, the higher the sensitivity of magnetic Barkhausen detection. The speed corresponding to the maximum value is taken as the optimal speed;

[0012] Step 5: The magnetic Barkhausen signal is picked up by placing a coil in the middle of the magnetic pole of the yoke and perpendicular to the raceway of the bearing ring. The magnetic Barkhausen signal of the receiving coil can be collected by an analog signal acquisition card. The sampling frequency is higher than twice the highest frequency of the magnetic Barkhausen signal. The preferred range is ;

[0013] Step 6: Calculate the RMS envelope of the magnetic Barkhausen signal by calculating RMS of sampling points , the calculated RMS values are sequentially connected to obtain the RMS envelope of the magnetic Barkhausen signal, and the maximum value of the RMS envelope of the magnetic Barkhausen signal is , minimum value The maximum and minimum values of the root mean square envelope corresponding to a single rotation of the bearing are used to determine whether the bearing is burned. The ratio of the maximum value to the minimum value of the root mean square envelope and the average value of the root mean square envelope are used to determine whether the bearing is burned. When both condition parameters are lower than the alarm threshold, the ring is determined to be qualified. When any one of the condition parameters is higher than the alarm threshold, the ring is determined to be unqualified.

[0014] Furthermore, the signal of the bearing ring detected by the magnetic Barkhausen signal is a continuous and uniform noise signal of the qualified sample detection signal. In the process of the unqualified tempered burn sample rotating from the tempered burn area to the magnetized area below the receiving coil and away from it, the magnetic Barkhausen signal shows a trend of first increasing and then decreasing, and the ratio of the maximum value to the minimum value of the root mean square envelope of the bearing rotating a single turn increases; in the process of the unqualified quenched burn sample rotating from the quenched burn area to the magnetized area below the receiving coil and away from it, the magnetic Barkhausen signal shows a trend of first decreasing and then increasing, and the ratio of the maximum value to the minimum value of the root mean square envelope of the bearing rotating a single turn decreases.

[0015] In the second aspect, the present invention provides a detection device according to the high-speed detection method for bearing ring grinding burn as described in any one of the above, including a bearing rotation drive unit, a permanent magnet yoke excitation unit, a magnetic Barkhausen signal receiving unit, a magnetic Barkhausen signal acquisition unit and a magnetic Barkhausen signal processing unit, the bearing rotation drive unit is composed of a driving wheel and a driven wheel, the permanent magnet yoke excitation unit includes a single permanent magnet to provide an excitation magnetic field, and the permanent magnet yoke excitation unit can be set to two detection modes: axial magnetization and circumferential magnetization. When axially magnetized, the permanent magnet poles The connecting line is parallel to the axial direction of the bearing ring. During circumferential magnetization, the connecting line of the permanent magnet poles is perpendicular to the axial direction of the bearing ring. The magnetic Barkhausen signal receiving unit is composed of a coil, and the axis of the coil is perpendicular to the bearing raceway. The magnetic Barkhausen signal processing unit includes a low-pass filter operational amplifier, which can filter out high-frequency noise interference signals. The magnetic Barkhausen signal acquisition unit converts the analog signal of the magnetic Barkhausen signal receiving unit into a digital signal through an analog signal acquisition card and a root mean square envelope calculation algorithm.

[0016] Compared with the existing technology, the advantages of the present invention are as follows: the high-speed detection method and device for bearing ring grinding burn of the present invention adopts a single permanent magnet to provide an excitation magnetic field, utilizes the magnetic field of the permanent magnet to interact with the magnetic domain inside the raceway, and induces the Barkhausen jump due to the disturbance of the interaction caused by the relative motion of the permanent magnet and the bearing ring raceway, thereby eliminating the signal generator and power amplifier required for the traditional time-varying magnetic field magnetization; the relative motion of the permanent magnetic field probe and the bearing ring raceway is achieved by utilizing the method of uniform rotation of the bearing and stationary probe, and the magnetic field is adjusted by controlling the rotation speed of the bearing. Amplitude response sensitivity of Barkhausen noise; using the magnetic yoke structure to achieve local magnetization of the bearing ring raceway, and magnetizing the bearing ring raceway by axial or circumferential magnetization; using a coil located in the middle of the magnetic yoke pole and placed perpendicular to the ring raceway to pick up the magnetic Barkhausen signal; using the root mean square envelope amplitude of the magnetic Barkhausen signal to identify raceway grinding burn, when there is no raceway grinding burn, the magnetic Barkhausen envelope amplitude is a flat straight line; when there is raceway grinding burn, the envelope amplitude of the magnetic Barkhausen signal suddenly changes at the location of the grinding burn.

[0017] The high-speed detection method and device for bearing ring grinding burn of the present invention adopts a single permanent magnet yoke excitation and a plurality of detection coils arranged in parallel to achieve full coverage detection of the raceway. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the detection device of the present invention;

[0019] Figure 2 Schematic diagram of the matching relationship between the permanent magnet yoke structure and the receiving coil of the present invention;

[0020] Figure 3 This is a diagram of the magnetic Barkhausen signal without grinding burn of the present invention;

[0021] Figure 4 This is a diagram of the root mean square envelope of the magnetic Barkhausen signal of the grinding-free ferrule of the present invention;

[0022] Figure 5 This is a tempering burn magnetic Barkhausen signal diagram of the present invention;

[0023] Figure 6 This is a diagram of the root mean square envelope of the magnetic Barkhausen signal of the tempered burn ferrule of the present invention;

[0024] Figure 7 This is a quenching burn detection signal diagram of the present invention;

[0025] Figure 8 This is a diagram of the root mean square envelope of the magnetic Barkhausen signal of the quenched and burned ferrule of the present invention;

[0026] Figure 9Schematic diagram of the detection system of the present invention;

[0027] Figure 10 is a circuit diagram of a low-pass filter amplifier of the present invention;

[0028] In the figure: driving wheel 1, driven wheel 2, detected bearing ring 3, permanent magnet yoke 4, spring-pressing structure 5, signal receiving coil 6, bearing rotation drive unit 7, permanent magnet yoke excitation unit 8, magnetic Barkhausen signal receiving unit 9, magnetic Barkhausen signal processing unit 10, magnetic Barkhausen signal acquisition unit 11. DETAILED DESCRIPTION

[0029] The following will provide a clear and complete description of the technical solutions in the examples of the present invention, in conjunction with the accompanying drawings. The described examples are only one embodiment of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0030] See also Figures 1-10 The present invention provides a high-speed detection method for bearing ring grinding burn, wherein the detection method adopts a permanent magnet magnetization device that is stationary, and the detected bearing ring 3 is excited to generate a magnetic Barkhausen signal by rotating at high speed relative to the magnetization device;

[0031] The magnetic domains in the magnetized area produce magnetic domain movement under the action of the permanent magnet's magnetic field, and the displacement of the magnetic domain wall generates a magnetic Barkhausen signal. The receiving coil receives the magnetic Barkhausen signal, which is converted into a digital magnetic Barkhausen signal through a signal amplifier and low-pass filtering through an acquisition card. The root mean square envelope of the digital magnetic Barkhausen signal is calculated as the judgment condition for ring burn. By monitoring whether the maximum value of the root mean square envelope of the magnetic Barkhausen signal is within the set range, it is determined whether the bearing ring has grinding burn.

[0032] Furthermore, a method for detecting grinding burns by using a permanent magnet fixed and a bearing ring rotating at high speed relative to a magnetizing device to generate a magnetic Barkhausen signal includes the following steps:

[0033] Step 1: The relative motion between the permanent magnet magnetic field and the bearing ring raceway is achieved by rotating the bearing at a constant speed and keeping the probe stationary. The interaction between the permanent magnet magnetic field and the magnetic domain inside the raceway is used. The relative motion between the permanent magnet magnetic field and the bearing ring raceway causes a disturbance in the interaction to induce a Barkhausen jump. The bearing rotation device includes two driving wheels 1 and an auxiliary rotating driven wheel 2. The two driving wheels rotate at a constant speed to drive the bearing ring to rotate. The driven wheel is designed as a spring-pressing structure 5 for pressing the bearing ring to prevent the ring from shaking. When installing the bearing, the driven wheel needs to be pulled apart, the bearing ring is placed above the two driving wheels, and the driven wheel is released to ensure that the spring-pressing structure 5 is in a stretched state.

[0034] Step 2: The detection probe uses a permanent magnet yoke 4 and a signal receiving coil 6 as an integrated probe. The signal receiving coil uses a linear array coil to achieve full coverage scanning of the bearing ring. The lower end surface of the coil and the lower surface of the yoke pin are in the same plane. The probe is designed with a spring pressure structure 5. The number of magnetic Barkhausen probe detection coils must not be less than , the result is rounded down, L is the width of the bearing ring, To detect the outer diameter of the coil, the detection probe is pressed before detection so that the wedge-shaped end of the detection probe is in a compressed state. The probe structure can realize two magnetization modes: local magnetization along the circumference of the raceway and local magnetization in the axial direction.

[0035] Step 3: Use the encoder to detect the rotation angle of the driven wheel to control the distance interval of the sampling points to achieve equal space sampling. The single sampling rotation angle is the rotation angle of the driven wheel per rotation. The sampling angle is sampled once, and the interval between the sampling points is at most half of the outer diameter of the receiving coil. , is the outer diameter of the receiving coil, then the corresponding driving wheel rotates by an angle of , is the effective rotation radius of the driven wheel;

[0036] Step 4: Use the grinding, tempering and burning bearing rings and the non-grinding and burning bearing rings of the same size as the comparison samples to determine the optimal magnetic Barkhausen detection sensitivity speed, and calculate the maximum value of the root mean square envelope of the grinding and burning magnetic Barkhausen signal at the same speed. Average value of the RMS envelope curve with no grinding burn Ratio As the basis for determining the sensitivity of magnetic Barkhausen detection, different ratios are obtained by changing the speed of the driving wheel. ratio The larger the value, the higher the sensitivity of magnetic Barkhausen detection. The speed corresponding to the maximum value is taken as the optimal speed;

[0037] Step 5: Use the coil placed in the middle of the magnetic pole of the yoke and perpendicular to the ring raceway to pick up the magnetic Barkhausen signal. Use the analog signal acquisition card to collect the magnetic Barkhausen signal of the receiving coil. The sampling frequency must be higher than twice the highest frequency of the magnetic Barkhausen signal. The preferred range is ;

[0038] Step 6: Calculate the RMS envelope of the magnetic Barkhausen noise signal and calculate the RMS of sampling points , connect the calculated RMS in sequence to get the RMS envelope, the maximum value of the RMS envelope , minimum value The maximum and minimum values of the RMS envelope corresponding to a single rotation of the bearing are calculated by the ratio of the maximum value to the minimum value of the RMS envelope. The two conditional parameters of the value of the ring and the average value of the root mean square envelope are used to determine whether the ring is burned. When both conditional parameters are lower than the alarm threshold, the ring is determined to be qualified. When any one conditional parameter is higher than the alarm threshold, it is determined to be unqualified.

[0039] Furthermore, the signal characteristics of the bearing ring detection by permanent magnet excitation magnetic Barkhausen are as follows: the detection signal of the qualified sample is a continuous and uniform noise signal; when the unqualified tempered burn sample rotates from the tempered burn area to the magnetized area below the receiving coil and away from it, the magnetic Barkhausen signal shows a trend of first increasing and then decreasing, and the ratio of the maximum value to the minimum value of the single-turn root mean square envelope line increases significantly; when the unqualified quenched burn sample rotates from the quenching burn area to the magnetized area below the receiving coil and away from it, the magnetic Barkhausen signal shows a trend of first decreasing and then increasing, and the ratio of the maximum value to the minimum value of the root mean square envelope line of the bearing rotation single turn decreases.

[0040] In one embodiment, taking the axial magnetization method as an example, the bearing ring grinding burn detection method based on the magnetic Barkhausen method of the present invention includes the following steps:

[0041] Step 1: First, fix the bearing ring to the bearing rotation drive unit 7, pull the driven wheel 2 vertically upward along the track, and place the bearing ring vertically above the two driving wheels 1 so that the outer surface of the bearing ring fits the surface of the driving wheel 1. Loosen the driven wheel and ensure that the spring-pressing structure 5 is in a compressed state;

[0042] Step 2: Bearing Ring Inner Diameter , bearing ring width , detection coil outer diameter The rotation radius of the driving wheel and the driven wheel is , then the single sampling rotation angle can be obtained ;

[0043] Step 3: Use comparative test to determine the optimal sensitivity speed. 、 、 、 、 Five groups of gradient speed experiments were conducted, and the maximum value of the root mean square envelope of the grinding burn magnetic Barkhausen signal was taken from the five groups. With no grinding burn RMS including average The maximum value of the ratio The corresponding driving wheel speed is used as the optimal magnetic Barkhausen detection sensitivity speed;

[0044] Step 4: Place the detection probe vertically downward with the detection surface of the probe perpendicular to the surface of the bearing ring. Apply downward pressure to the probe to keep it in a compressed state.

[0045] Step 5: Power on the bearing rotation drive device and start the driving wheel. When the driving wheel speed stabilizes, the signal acquisition unit collects the magnetic Barkhausen signal. When the driving wheel drives the bearing ring to start uniform motion, the bearing ring raceway is magnetized to generate a magnetic Barkhausen signal. The Barkhausen signal picked up by the receiving coil first passes through the signal amplifier and then through the low-pass filter to enter the acquisition card to obtain the magnetic Barkhausen signal waveform, as shown in the following figure: Figure 3 、 Figure 5 as well as Figure 7 They are the magnetic Barkhausen signal waveform of the unburned bearing ring, the magnetic Barkhausen signal waveform of the tempered and burned bearing ring, and the magnetic Barkhausen signal waveform of the quenched and burned bearing ring. Finally, the data is processed by the magnetic Barkhausen signal processing unit to obtain the root mean square envelope, as shown Figure 4 、 Figure 6 as well as Figure 8 They are the root mean square envelope of unburned bearing rings, the root mean square envelope of tempered and burned bearing rings, and the root mean square envelope of quenched and burned bearing rings respectively;

[0046] Step 6: The magnetic Barkhausen signal processing unit calculates the ratio of the maximum value Max to the minimum value Min of the RMS envelope of the collected magnetic Barkhausen signal (Max / Min) and the average value Avg of the envelope. If the Max / Min ratio is greater than the alarm threshold Thres1 or Avg is greater than the alarm threshold Thres2, the bearing is unqualified. Figure 3 The bearings shown in c, d, e, and f are unqualified. If the Max / Min ratio is less than Thres1 and Avg is less than the alarm threshold Thres2, the bearing is judged to be a qualified bearing without burns. Figure 3 and Figure 4 Qualified bearings shown.

[0047] In the second aspect, the present invention provides a detection device for the high-speed detection method of bearing ring grinding burn as described above, including a bearing rotation drive unit 7, a permanent magnet yoke excitation unit 8, a magnetic Barkhausen signal receiving unit 9, a magnetic Barkhausen signal acquisition unit 11, and a magnetic Barkhausen signal processing unit 10. The bearing rotation drive unit is composed of a driving wheel and a driven wheel, and its main function is to make the bearing ring rotate at high speed. The permanent magnet yoke excitation unit is composed of a single permanent magnet to provide an excitation magnetic field. The permanent magnet yoke excitation unit can be set to axial magnetization and circumferential magnetization. Two detection modes are available. During axial magnetization, the line connecting the permanent magnet poles is parallel to the axial direction of the bearing ring. During circumferential magnetization, the line connecting the permanent magnet poles is perpendicular to the axial direction of the bearing ring. The magnetic Barkhausen signal receiving unit is generally composed of a coil, and the coil axis is perpendicular to the bearing raceway. The magnetic Barkhausen signal processing unit includes a low-pass filtering operational amplifier, which mainly filters out high-frequency noise interference signals. The magnetic Barkhausen signal acquisition unit includes an analog signal acquisition card and a root mean square envelope calculation algorithm, which converts the analog signal received and processed by the magnetic Barkhausen signal into a digital signal.

[0048] Compared with the prior art, the advantages of the present invention are as follows:

[0049] The high-speed detection method and device for bearing ring grinding burn of the present invention adopts a single permanent magnet to provide an excitation magnetic field, utilizes the magnetic field of the permanent magnet to interact with the magnetic domain inside the raceway, and induces the Barkhausen jump caused by the disturbance of the interaction caused by the relative motion of the permanent magnet and the bearing ring raceway, thereby eliminating the signal generator and power amplifier required for traditional time-varying magnetic field magnetization; the relative motion of the permanent magnetic field probe and the bearing ring raceway is achieved by utilizing the method of uniform rotation of the bearing and stationary probe, and the magnetic Barkhausen noise is adjusted by controlling the rotation speed of the bearing. Amplitude response sensitivity; using the magnetic yoke structure to achieve local magnetization of the bearing ring raceway, and magnetizing the bearing ring raceway by axial or circumferential magnetization; using a coil located in the middle of the magnetic yoke pole and placed perpendicular to the ring raceway to pick up the magnetic Barkhausen signal; using the root mean square envelope amplitude of the magnetic Barkhausen signal to identify raceway grinding burn, when there is no grinding burn on the raceway, the magnetic Barkhausen envelope amplitude is a flat straight line; when there is grinding burn on the raceway, the envelope amplitude of the magnetic Barkhausen signal suddenly changes at the location of the grinding burn.

[0050] The high-speed detection method and device for bearing ring grinding burn of the present invention adopts a single permanent magnet yoke excitation and a plurality of detection coils arranged in parallel to achieve full coverage detection of the raceway.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-speed detection method for bearing ring grinding burn, characterized in that: The permanent magnet magnetizing device is kept stationary, while the bearing ring being tested rotates at high speed relative to the permanent magnet magnetizing device to generate a magnetic Barkhausen signal; The magnetic domains in the magnetized region generate magnetic domain movement under the relative motion of the permanent magnet's magnetic field, and the magnetic domain wall displacement generates the magnetic Barkhausen signal. The receiving coil receives the magnetic Barkhausen signal, and after passing through a signal amplifier and low-pass filtering, it can be converted into a digital magnetic Barkhausen signal through an acquisition card. The root mean square envelope of the digital magnetic Barkhausen signal is calculated as a judgment condition for ring burn. By monitoring whether the maximum value of the root mean square envelope of the digital magnetic Barkhausen signal is within a set range, it is judged whether the bearing ring has grinding burn. The permanent magnet magnetization device is used to fix the bearing ring, and the bearing ring is rotated at high speed relative to the permanent magnet magnetization device to generate the magnetic Barkhausen signal, including the following steps: Step 1, the relative motion of the permanent magnet magnetic field and the raceway of the bearing ring is achieved by rotating the bearing at a constant speed and keeping the probe stationary, the permanent magnet magnetic field interacts with the magnetic domain inside the raceway of the bearing ring, and the relative motion of the permanent magnet magnetic field and the raceway of the bearing ring induces a Barkhausen jump through the disturbance of the interaction, the bearing rotating device includes two driving wheels and a driven wheel for assisting the rotation, the two driving wheels rotate at a constant speed to drive the bearing ring to rotate, the driven wheel has a spring-pressing structure, the driven wheel can press the bearing ring to prevent the bearing ring from shaking, and the driven wheel needs to be pulled apart when installing the bearing, and the bearing ring is placed above the two driving wheels, and the driven wheel is released to ensure that the spring-pressing structure of the driven wheel is in a stretched state; Step 2: The probe used for detection is a probe that integrates a permanent magnet yoke and a signal receiving coil. The signal receiving coil adopts a linear array coil to achieve full coverage scanning of the bearing ring. The lower end surface of the bearing ring and the lower surface of the pin of the permanent magnet yoke are in the same plane. The probe is provided with a spring pressure structure. The number of detection coils of the probe shall not be less than , the result is rounded down, L is the width of the bearing ring, To detect the outer diameter of the coil, the probe is pressed before testing so that the wedge-shaped end of the probe is in a compressed state. The probe can achieve two magnetization modes: local magnetization along the circumference of the raceway and local magnetization along the axial direction. Step 3: Use the encoder to detect the rotation angle of the driven wheel to control the sampling point distance interval to achieve equal space sampling. The single sampling rotation angle is the rotation angle of the driven wheel per rotation. The angle is sampled once, and the sampling points are spaced at most , is the outer diameter of the receiving coil, and the rotation angle of the driving wheel is , is the effective rotation radius of the driven wheel; Step 4: Use the same size of grinding, tempering and burning bearing rings and non-grinding and burning bearing rings as comparison to determine the optimal magnetic Barkhausen detection sensitivity speed, and calculate the maximum value of the root mean square envelope of the digital magnetic Barkhausen signal of grinding, tempering and burning at the same speed. The average value of the RMS envelope of the digital magnetic Barkhausen signal with no grinding burn Ratio As the basis for determining the sensitivity of the magnetic Barkhausen detection, different ratios η are obtained by changing the speed of the driving wheel. The larger the value, the higher the sensitivity of magnetic Barkhausen detection. The speed corresponding to the maximum value is taken as the optimal speed; Step 5, the magnetic Barkhausen signal is picked up by placing a coil in the middle of the magnetic yoke pole and perpendicular to the raceway of the bearing ring, and the magnetic Barkhausen signal of the receiving coil can be collected by an analog signal acquisition card, and the sampling frequency is higher than twice the highest frequency of the magnetic Barkhausen signal. The range is ; Step 6, calculate the root mean square envelope of the magnetic Barkhausen signal, by calculating each RMS of sampling points , the calculated RMS values are sequentially connected to obtain the RMS envelope of the magnetic Barkhausen signal, and the maximum value of the RMS envelope of the magnetic Barkhausen signal is , minimum value The maximum and minimum values of the root mean square envelope corresponding to a single rotation of the bearing are used to determine whether the bearing is burned. The ratio of the maximum value to the minimum value of the root mean square envelope and the average value of the root mean square envelope are used to determine whether the bearing is burned. When both condition parameters are lower than the alarm threshold, the ring is determined to be qualified. When any condition parameter is higher than the alarm threshold, it is determined to be unqualified.

2. The high-speed detection method for bearing ring grinding burn according to claim 1 is characterized in that: The signal of the bearing ring detected by magnetic Barkhausen signal is a qualified sample detection signal, which is a continuous and uniform noise signal; when the unqualified tempered burn sample rotates from the tempered burn area to the magnetized area below the receiving coil and away from it, the magnetic Barkhausen signal shows a trend of first increasing and then decreasing, and the ratio of the maximum value to the minimum value of the root mean square envelope of the bearing rotating a single turn increases; when the unqualified quenched burn sample rotates from the quenching burn area to the magnetized area below the receiving coil and away from it, the magnetic Barkhausen signal shows a trend of first decreasing and then increasing, and the ratio of the maximum value to the minimum value of the root mean square envelope of the bearing rotating a single turn decreases.

3. A detection device for a high-speed detection method for bearing ring grinding burn according to any one of claims 1 to 2, characterized in that: It includes a bearing rotation drive unit, a permanent magnet yoke excitation unit, a magnetic Barkhausen signal receiving unit, a magnetic Barkhausen signal acquisition unit and a magnetic Barkhausen signal processing unit. The bearing rotation drive unit is composed of a driving wheel and a driven wheel. The permanent magnet yoke excitation unit includes a single permanent magnet to provide an excitation magnetic field. The permanent magnet yoke excitation unit can be set to two detection modes: axial magnetization and circumferential magnetization. During axial magnetization, the line connecting the permanent magnet poles is parallel to the axial direction of the bearing ring. During circumferential magnetization, the line connecting the permanent magnet poles is perpendicular to the axial direction of the bearing ring. The magnetic Barkhausen signal receiving unit is composed of a coil, and the axis of the coil is perpendicular to the bearing raceway. The magnetic Barkhausen signal processing unit includes a low-pass filter operational amplifier, which can filter out high-frequency noise interference signals. The magnetic Barkhausen signal acquisition unit converts the analog signal of the magnetic Barkhausen signal receiving unit into a digital signal through an analog signal acquisition card and a root mean square envelope calculation algorithm.

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