A detection method, system, device and storage medium for insulating bearings

Abstract

The present invention discloses a method, system, device, and storage medium for detecting the ability of insulating bearings to resist high-frequency alternating current corrosion. The method comprises: obtaining shaft voltage data of at least one bearing to be tested using a measuring device; simulating long-duration high-frequency alternating current voltage data in the shaft voltage data and testing each of the at least one bearing to be tested using the testing device to obtain a voltage waveform corresponding to each bearing to be tested; determining a first curve relationship based on the voltage waveform and thickness parameters of the insulating layer corresponding to each bearing to be tested at different frequencies; determining a second curve relationship based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; and using the second curve relationship to design the thickness of the insulating layer corresponding to different bearings in the motor.

Description

Technical Field

[0001] The present invention relates to the field of electricity, and in particular to a method, system, equipment and storage medium for detecting the high-frequency alternating current corrosion resistance of an insulating bearing. Background Art

[0002] Currently, existing testing methods for bearing insulation are limited and cannot accurately assess a bearing's ability to withstand alternating current. The most common testing methods use a voltage that differs from the shaft voltage experienced by the bearing during actual operation. Current testing methods cannot simulate the actual shaft voltage for targeted testing.

[0003] The traction motor is subjected to high-frequency common-mode voltage during operation, which causes the inner and outer rings and rolling elements of the bearing to be corroded by high-frequency weak current for a long time. Under the action of the current, cracks are generated on the surface. The cracks gradually expand during operation to form spalling pits. As the running time increases, the number of spalling pits increases, the cage is severely worn and eventually deformed or broken, causing failures such as Figure 1 and Figure 2 As shown, Figure 1 Schematic diagram of washboard or spalling pits on a rolling element provided for related art; Figure 2 Schematic diagram of washboard or peeling pits on a track provided for related art.

[0004] However, current methods for evaluating the ability of insulated bearings to withstand long-term, high-frequency AC shaft voltages are insufficient, and there is no suitable verification method, making it impossible to design insulation coatings in a targeted manner. There is currently no effective solution to these problems. Summary of the Invention

[0005] In order to solve the existing technical problems, the main purpose of the present invention is to provide a method, system, equipment and storage medium for detecting the ability of insulating bearings to resist high-frequency alternating current corrosion.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] In a first aspect, the present invention provides a method for detecting the ability of an insulated bearing to resist high-frequency alternating current corrosion, which is applied to a detection system comprising a measuring device and a testing device; the measuring device is disposed in a non-transmission position of each traction motor; and the bearing in each traction motor is disposed in the testing device. The method comprises:

[0008] Acquiring shaft voltage data of at least one bearing to be tested by the measuring device;

[0009] Simulating the long-duration high-frequency AC voltage data in the shaft voltage data and the testing device to test each of the at least one bearing to be tested, to obtain a voltage waveform corresponding to each bearing to be tested;

[0010] Determining a first curve relationship based on the voltage waveform and the thickness parameters of the insulation layer corresponding to each bearing to be tested at different frequencies; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested;

[0011] A second curve relationship is determined based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; the second curve relationship represents the relationship between the thickness parameter and the voltage amplitude; the second curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

[0012] In the above solution, obtaining shaft voltage data of at least one bearing to be measured by the measuring device includes:

[0013] The first voltage data and the second voltage data corresponding to the rotor and the base of the motor are acquired respectively by the measuring device; and the shaft voltage data is determined according to the first voltage data and the second voltage data.

[0014] In the above solution, the method further includes:

[0015] The shaft voltage data is decomposed to obtain the long-duration high-frequency alternating current voltage data.

[0016] In the above solution, the simulation of the shaft voltage data obtains long-duration high-frequency AC voltage data and the testing device tests each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested;

[0017] Using the long-duration high-frequency AC voltage data in the shaft voltage data to simulate the actual voltage of each bearing to be tested;

[0018] Based on the actual voltage, each bearing to be tested in the at least one bearing to be tested is tested on the above-mentioned testing device to obtain a voltage waveform corresponding to each bearing to be tested.

[0019] In the above solution, determining the first curve relationship based on the voltage waveform and the thickness parameters of the insulation layer corresponding to each bearing to be tested at different frequencies includes:

[0020] Determine, based on the voltage waveform, a first leakage current of each bearing to be tested in an online operating state; the first leakage current represents a current generated by the corresponding insulation layer of each bearing to be tested when the bearing to be tested operates in the voltage waveform;

[0021] determining the impedance parameters of each bearing to be tested at different frequencies according to the thickness of the insulating layer;

[0022] The first curve relationship is determined based on the first leakage current and the impedance parameter of each bearing to be tested.

[0023] In the above solution, determining the first curve relationship based on the first leakage current and the impedance parameter of each bearing to be tested includes:

[0024] determining a safety limit value corresponding to the first leakage current based on the first leakage current;

[0025] The first curve relationship is determined based on the safety limit value and the impedance parameter of each bearing to be tested.

[0026] In a second aspect, the present invention further provides a method for designing high-frequency alternating current corrosion resistance, comprising:

[0027] Obtain the bearing voltage value of the traction motor in the train;

[0028] determining the thickness of the insulation layer corresponding to the bearing of the traction motor in the train according to the relationship between the bearing voltage value and the second curve;

[0029] Wherein, the second curve relationship is obtained based on any one of the method embodiments described above.

[0030] In a third aspect, the present invention further provides a system for detecting the ability of insulating bearings to resist high-frequency alternating current corrosion, the detection system comprising: a measuring device, a testing device, and a processing device; the measuring device is arranged at a non-transmission position of each traction motor; the bearings in each traction motor are arranged in the testing device; wherein,

[0031] The measuring device is used to obtain shaft voltage data of at least one bearing to be tested;

[0032] The testing device is used to simulate the long-duration high-frequency AC voltage data in the shaft voltage data and to test each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested;

[0033] The processing device is used to determine a first curve relationship based on the voltage waveform and the thickness parameter of the insulating layer corresponding to each bearing to be tested; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested; and is also used to determine a second curve relationship based on the thickness parameter and the first curve relationship; the second curve relationship is used to design the thickness of the insulating layer corresponding to different bearings in the motor.

[0034] In a fourth aspect, an embodiment of the present invention provides a storage medium having a computer program stored thereon; the computer program, when executed by a processor, implements the steps of any of the above methods.

[0035] In a fifth aspect, an embodiment of the present invention provides a device for detecting the ability of an insulated bearing to resist high-frequency alternating current corrosion, the device comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein when the processor is used to run the computer program, the steps of any one of the above methods are executed.

[0036] An embodiment of the present invention provides a method, system, device, and storage medium for detecting the ability of insulating bearings to resist high-frequency alternating current corrosion. The method is applied to a detection system comprising a measuring device and a testing device; the measuring device is disposed at a non-transmission position of each traction motor; and the bearings in each traction motor are disposed in the testing device. The method comprises: obtaining shaft voltage data of at least one bearing to be tested by the measuring device; simulating long-duration high-frequency alternating voltage data in the shaft voltage data and testing each of the at least one bearing to be tested with the testing device to obtain a voltage waveform corresponding to each bearing to be tested; determining a first curve relationship based on the voltage waveform and thickness parameters of the insulating layer corresponding to each bearing to be tested at different frequencies; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested; determining a second curve relationship based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; the second curve relationship represents the relationship between the thickness parameter and the voltage amplitude; and the second curve relationship is used to design the thickness of the insulating layer corresponding to different bearings in the motor. By adopting the technical solution of the embodiment of the present invention, the shaft voltage data of at least one bearing to be tested is obtained through the measuring device; the second curve relationship is determined based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; the second curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor; the measured shaft voltage can be simulated for detection, thereby realizing targeted design of the thickness of the insulation coating of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of washboard or spalling pits on a rolling element provided for related art;

[0038] Figure 2 Schematic diagram of washboard or spalling pits on the track provided for related art;

[0039] Figure 3 A schematic diagram of a motor bearing measurement provided in the related art;

[0040] Figure 4 A schematic flow chart of a method for detecting the ability of an insulated bearing to resist high-frequency alternating current corrosion provided by an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of a shaft voltage testing tool provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of a voltage waveform actually measured according to an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of a voltage waveform diagram simulating an actual test provided by an embodiment of the present invention;

[0044] Figure 8 A schematic diagram showing the relationship between voltage and frequency of a bearing with different insulation layer thicknesses against long-term high-frequency alternating current provided by an embodiment of the present invention;

[0045] Figure 9 A schematic diagram of a carbon brush structure at the top of a bearing provided by an embodiment of the present invention;

[0046] Figure 10 A schematic diagram of a shaft voltage measuring device provided by an embodiment of the present invention;

[0047] Figure 11 A schematic diagram of a long-duration high-frequency AC voltage in a shaft voltage waveform provided by an embodiment of the present invention;

[0048] Figure 12 A schematic flow chart of a method for designing high-frequency AC corrosion resistance according to an embodiment of the present invention;

[0049] Figure 13 A flowchart of a specific implementation method for measuring the ability of an insulated bearing of a traction motor to withstand long-term high-frequency alternating current, provided by an embodiment of the present invention;

[0050] Figure 14 A schematic flow chart of a process for estimating the resistance of an insulating bearing to long-duration high-frequency alternating current provided by an embodiment of the present invention;

[0051] Figure 15 A schematic structural diagram of a system for detecting the ability of insulating bearings to resist high-frequency alternating current corrosion, provided by an embodiment of the present invention;

[0052] Figure 16 A schematic diagram of the hardware structure of the detection device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] Regarding the voltage capability of bearings during operation, DC withstand voltage value, AC withstand voltage value, and insulation resistance are commonly used in related technologies for testing, such as Figure 3 As shown, Figure 3A schematic diagram of a motor bearing test is provided for related technologies. By applying tin foil or copper foil tape to the bearing insulation layer or installing a clamping fixture, the insulation resistance and DC or AC withstand voltage of the bearing are measured. The power supply voltage used in this test method is inconsistent with the shaft voltage experienced by the traction motor during operation. The actual shaft voltage consists of long-duration, high-frequency AC current and short-duration surge voltage. Current test methods are unable to simulate the actual measured shaft voltage and therefore cannot accurately assess the failure risk of insulated bearings on operating vehicles.

[0054] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific technical solutions of the invention will be described in further detail below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0055] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] Figure 4 The present invention provides a flow chart of a method for detecting the high-frequency alternating current corrosion resistance of an insulating bearing. Figure 4 As shown, the method is applied to a detection system including a measuring device and a testing device; the measuring device is arranged at a non-transmission position of each traction motor; the bearing in each traction motor is arranged in the testing device, and the method includes:

[0057] S401: Acquire shaft voltage data of at least one bearing to be measured by the measuring device.

[0058] In this embodiment, the measuring device is a device for measuring bearing voltage, which is not limited herein. As an example, the measuring device can be a shaft voltage measuring device with a carbon brush structure. The shaft voltage data can be the shaft voltage of the bearing to be tested. The bearing to be tested can be of different models.

[0059] S402: Simulate the long-duration high-frequency AC voltage data in the shaft voltage data and the testing device to test each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested.

[0060] In this embodiment, the shaft voltage data includes long-duration high-frequency AC voltage data and short-duration surge voltage data. The testing device is a device for testing bearings, which is not limited here. As an example, the testing device can be a shaft voltage test tool. Figure 5 A schematic diagram of a shaft voltage testing tool provided in an embodiment of the present invention. Figure 5In the figure, 1-wet heat chamber, 2-terminal block, 3-test leads, 4-pulse width modulation power supply, 5-test shaft, 6-bearing #1 test fixture 1, 7-bearing #1, 8-bearing #1 test fixture 2, 9-bearing #2 test fixture 2, 10-bearing #2, 11-bearing #2 test fixture 1, 12-current clamp, 13-high-frequency oscilloscope.

[0061] In this embodiment, the voltage waveform represents the relationship between time and voltage amplitude, and the voltage waveform can be the waveform of the above-mentioned test power supply. For ease of understanding, an example is given here. Figure 6 A schematic diagram of a voltage waveform actually measured according to an embodiment of the present invention is shown in FIG. Figure 6 As shown, the horizontal axis is time and the vertical axis is voltage amplitude; Figure 7 A schematic diagram of a voltage waveform diagram simulating an actual test provided by an embodiment of the present invention, wherein the horizontal axis is time and the vertical axis is voltage amplitude; Figure 7 It will Figure 6 The waveforms shown are connected to the waveform diagram simulated after the above test fixture is applied. Figure 6 and Figure 7 The frequencies in are the same, Figure 7 The proportion of pulse width in Figure 6 According to the area equivalence principle, when narrow pulses with equal areas but different shapes are added to the link with inertia, their output effects are basically equal. Figure 6 and Figure 7 The output effect is the same.

[0062] S403: Determine a first curve relationship based on the voltage waveform and thickness parameters of the insulation layer corresponding to each bearing to be tested at different frequencies; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested.

[0063] In this embodiment, for ease of understanding, an example is given here to illustrate that the safety limit of the leakage current generated during the operation of the bearing is determined based on the voltage waveform, the impedance parameters corresponding to different frequencies can be determined according to different insulation layer thicknesses, and the relationship between the voltage amplitude and the frequency is determined based on the safety limit of the leakage current and the impedance parameters at different frequencies.

[0064] S404: Determine a second curve relationship based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; the second curve relationship represents the relationship between the thickness parameter and the voltage amplitude; the second curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

[0065] In this embodiment, for ease of understanding, the first curve represents the relationship between voltage amplitude and frequency. Based on the different thickness parameters of the bearing insulation layer, the relationship between voltage amplitude and frequency at different thicknesses can be obtained, thereby further obtaining the relationship between thickness parameters and voltage amplitude. The appropriate thickness parameters for different bearings in the motor can be obtained based on the shaft voltage value.

[0066] For ease of understanding, here is an example: Figure 8 A schematic diagram of the relationship between voltage and frequency of a bearing with different insulation layer thicknesses against long-term high-frequency alternating current provided by an embodiment of the present invention, such as Figure 8 As shown, different insulation layer thicknesses correspond to different voltage and frequency curves. When the voltage is constant, the corresponding thickness parameters can be determined.

[0067] The detection method provided by an embodiment of the present invention obtains the shaft voltage data of at least one bearing to be tested through the measuring device; determines a second curve relationship based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; the second curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor; and can simulate the measured shaft voltage for detection, thereby realizing targeted design of the thickness of the insulating coating of the bearing.

[0068] In an optional embodiment of the present invention, obtaining the shaft voltage data of at least one bearing to be tested through the measuring device includes: obtaining first voltage data and second voltage data corresponding to the rotor and base of the motor respectively through the measuring device; and determining the shaft voltage data based on the first voltage data and the second voltage data.

[0069] In this embodiment, in this embodiment, the first voltage data is the voltage of the rotor of the motor; and the second voltage data is the voltage of the base. Figure 9 A schematic diagram of a carbon brush structure at the top of a bearing provided by an embodiment of the present invention. Figure 9 In the figure, 1 is the test bolt, 2 is the top shaft carbon brush, and 3 is the test wire. Figure 10 A schematic diagram of a shaft voltage measurement device provided by an embodiment of the present invention.

[0070] For ease of understanding, here is an example to illustrate that the shaft voltage measuring device is connected to the rotor and base of the motor respectively. Figure 9 In the test, the inner side of the bearing insulation layer and the motor rotor are connected to the test instrument through the test line ① of the top shaft carbon brush at the shaft end. Figure 10 In this test, the outer side of the bearing insulation layer and the motor base are connected to the test instrument via test line ②. The potential difference between the motor rotor and the base is tested to simulate the shaft voltage applied to both sides of the bearing insulation coating.

[0071] In the embodiment of the present invention, a shaft voltage measuring device is used, which has a compact structure and occupies a small space; is replaceable online and easy to maintain; has a small test circuit impedance and accurate measurement values.

[0072] In an optional embodiment of the present invention, the method further includes: decomposing the shaft voltage data to obtain the long-duration high-frequency AC voltage data.

[0073] In this embodiment, the shaft voltage data is decomposed by analyzing the waveform of the shaft voltage using analysis software, and the analysis software is an oscilloscope recorder, such as DL850. For ease of understanding, an example is given here to illustrate that the waveform of the shaft voltage is decomposed by the analysis software to obtain the voltage that the bearing withstands for a long time during operation (this part of the shaft voltage accounts for more than 90% of the entire operation process), which is the long-term high-frequency AC voltage. The long-term high-frequency AC voltage data can be combined with Figure 11 To understand, Figure 11 A schematic diagram of a long-duration, high-frequency AC voltage in the waveform of the shaft voltage provided by an embodiment of the present invention.

[0074] In an optional embodiment of the present invention, the simulation of the long-duration high-frequency AC voltage data in the shaft voltage data and the testing device to test each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested includes: using the long-duration high-frequency AC voltage data in the shaft voltage data to simulate the actual voltage of each bearing to be tested; and testing each of the at least one bearing to be tested on the testing device based on the actual voltage to obtain a voltage waveform corresponding to each bearing to be tested.

[0075] In this embodiment, for ease of understanding, an example is given here to illustrate that when the test bench simulates the long-term operation of the bearing, the test power supply is set according to the long-term high-frequency AC voltage data in the voltage data, wherein the power supply voltage and amplitude of the test power supply can be adjusted.

[0076] In an optional embodiment of the present invention, determining the first curve relationship based on the voltage waveform and the thickness parameters of the insulating layer corresponding to each bearing to be tested at different frequencies includes: determining a first leakage current of each bearing to be tested in an online operation state based on the voltage waveform; the first leakage current represents the current generated by the insulating layer corresponding to each bearing to be tested when working under the voltage waveform; determining the impedance parameters of each bearing to be tested at different frequencies according to the thickness of the insulating layer; and determining the first curve relationship based on the first leakage current and the impedance parameters of each bearing to be tested.

[0077] In this embodiment, the first leakage current of each bearing in the operating state is determined based on the voltage waveform, and the safety limit of the first leakage current is obtained according to the first leakage current; based on the different thicknesses of the insulation layer of the bearing, the corresponding impedance parameters at different frequencies are determined, and according to the leakage current limit and the impedance parameters, the voltage amplitudes of bearings of different thicknesses at different frequencies can be obtained, thereby determining the first curve relationship.

[0078] It should be noted that when the bearing is in the test device and connected to the test power supply, the bearing is in operation. At this time, the insulation layer of the bearing will generate leakage current.

[0079] In an optional embodiment of the present invention, determining the first curve relationship based on the first leakage current and the impedance parameter of each bearing to be tested includes: determining a safety limit corresponding to the first leakage current based on the first leakage current; and determining the first curve relationship based on the safety limit and the impedance parameter of each bearing to be tested.

[0080] In this embodiment, for ease of understanding, an example is given here to illustrate that different first leakage currents can be obtained by adjusting the test power supply, and whether the bearing is faulty at this time is detected based on the different leakage currents. The test power supply is adjusted until the bearing to be tested fails, thereby obtaining the safe limit of the leakage current of the bearing, and determining the first curve relationship based on the safe limit of the leakage current and the impedance parameter.

[0081] The embodiment of the present invention also provides a design method for high-frequency alternating current corrosion resistance. Figure 12 The following is a flow chart of a method for designing high-frequency AC corrosion resistance according to an embodiment of the present invention. Figure 12 As shown, the method includes the following steps:

[0082] S1201: Obtaining a bearing voltage value of a traction motor in a train;

[0083] S1202: Determine the thickness of the insulation layer corresponding to the bearing of the traction motor in the train according to the relationship between the bearing voltage value and the second curve;

[0084] The second curve relationship is obtained based on an embodiment of a method for detecting the ability to resist high-frequency alternating current corrosion provided by an embodiment of the present invention.

[0085] In this embodiment, the second curve relationship represents the relationship between insulation layer thickness and voltage amplitude. For ease of understanding, this example illustrates the relationship between the shaft voltage of a traction motor and the optimal insulation layer thickness at that time, calculated using the second curve relationship. Using the design method of this embodiment of the present invention, the insulation layer thickness of the traction motor bearings in a train can be specifically designed.

[0086] For ease of understanding, here is an example: To verify the ability of insulated bearings to withstand high-frequency AC current during operation, a test method for bearings withstanding prolonged high-frequency shaft voltage was designed. First, a carbon brush-based shaft voltage measurement device was installed on the non-drive side of the traction motor to measure the shaft voltage experienced during operation. Analysis software was used to decompose the shaft voltage waveform to determine the bearing's sustained shaft voltage during operation (this portion of the shaft voltage accounts for over 90% of the total operating time). A bearing test fixture was also designed, completely encasing the bearing. The lubrication conditions, temperature, and humidity were closely simulated to simulate the bearing's operating conditions. The inner races of the two bearings were connected via a test shaft, and the outer races were connected in parallel to a test power supply. The test power supply simulated the type of shaft voltage experienced during vehicle operation, with adjustable voltage and amplitude. The bearings were subjected to long-term aging tests to verify their resistance to high-frequency AC current. The test results were analyzed to inform the design of subsequent bearing coatings.

[0087] For ease of understanding, the present invention provides a specific test method for determining whether the insulated bearing of a traction motor can withstand long-term high-frequency alternating current. Figure 13 A flowchart of a specific implementation method for measuring the ability of an insulated bearing of a traction motor to withstand long-term high-frequency alternating current is provided in an embodiment of the present invention. Figure 13 As shown in the figure, shaft voltage test fixtures and experimental fixtures are designed according to the different structures of the motor. The online measured shaft voltage is analyzed and the long-term high-frequency shaft voltage in the shaft voltage test data is decomposed. The test power supply is set according to the measured shaft voltage waveform. The process of the bearing being subjected to long-term high-frequency shaft voltage is simulated on the test bench. According to the test results, the operating status of the online train set is analyzed and the most appropriate bearing insulation layer thickness is calculated to realize the forward design of the insulation capacity of the insulated bearing.

[0088] For ease of understanding, the present invention describes the above calculation process. Figure 14 This figure illustrates a flow chart illustrating the process for calculating the resistance of an insulated bearing to long-duration, high-frequency alternating current (AC) current. During the test, voltages of varying frequencies and amplitudes are applied to the bearing to simulate the effects of varying leakage currents on its long-term operation. The safety limit for the leakage current is determined based on the bearing operating data. Voltage-frequency curves for the resistance of bearings with varying insulation thicknesses to AC current over a long period of time are then derived based on these safety limits. Ultimately, the optimal design for the bearing's insulation capacity under the vehicle's measured shaft voltage is determined based on these curves.

[0089] Based on the same inventive concept as above, Figure 15This is a schematic diagram of a detection system for the high-frequency alternating current corrosion resistance of an insulated bearing provided in an embodiment of the present invention. The detection system 1500 includes: a measuring device 1501, a testing device 1502, and a processing device 1503; the measuring device 1501 is arranged at a non-transmission position of each traction motor; the bearing in each traction motor is arranged in the testing device 1502; wherein,

[0090] The measuring device 1501 is used to obtain shaft voltage data of at least one bearing to be measured;

[0091] The testing device 1502 is used to simulate the long-duration high-frequency AC voltage data in the shaft voltage data and to test each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested;

[0092] The processing device 1503 is used to determine a first curve relationship based on the voltage waveform and the thickness parameter of the insulating layer corresponding to each bearing to be tested; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested; and is also used to determine a second curve relationship based on the thickness parameter and the first curve relationship; the second curve relationship is used to design the thickness of the insulating layer corresponding to different bearings in the motor.

[0093] It should be noted that the actual structural diagram of the measuring device 1501 can be combined with the above Figure 10 To understand, the actual structure diagram of the test device 1502 can be combined with the previous Figure 5 It is understood that the processing device 1503 is connected to the testing device 1502 , and the connection relationship is not limited here. As an example, the processing device 1503 can be electrically connected to the testing device 1502 .

[0094] In some embodiments, the measuring device 1501 is further used to obtain first voltage data and second voltage data corresponding to the rotor and the base of the motor respectively; and determine the shaft voltage data according to the first voltage data and the second voltage data.

[0095] In some embodiments, the system 1500 further includes an analysis device for decomposing the shaft voltage data to obtain the long-duration high-frequency AC voltage data.

[0096] In some embodiments, the testing device 1502 is also used to simulate the actual voltage of each bearing to be tested using the long-duration and high-frequency AC voltage data in the shaft voltage data; based on the actual voltage, each bearing to be tested in the at least one bearing to be tested is tested on the testing device to obtain the voltage waveform corresponding to each bearing to be tested.

[0097] In some embodiments, the processing device 1503 is also used to determine the first leakage current of each bearing to be tested in an online operation state based on the voltage waveform; the first leakage current represents the current generated by the corresponding insulation layer when each bearing to be tested operates under the voltage waveform; the impedance parameters of each bearing to be tested at different frequencies are determined according to the thickness of the insulation layer; and the first curve relationship is determined based on the first leakage current and the impedance parameters of each bearing to be tested.

[0098] In some embodiments, the processing device 1503 is further configured to determine a safety limit corresponding to the first leakage current based on the first leakage current; and determine the first curve relationship based on the safety limit and the impedance parameter of each bearing to be tested.

[0099] In addition, other contents have been described in detail above, and you can refer to the above description and will not repeat them here.

[0100] An embodiment of the present invention further provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned method embodiment are implemented. The aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0101] An embodiment of the present invention also provides a device for detecting the ability of an insulated bearing to resist high-frequency alternating current corrosion. The device comprises: a processor and a memory for storing a computer program that can be run on the processor, wherein when the processor is used to run the computer program, it executes the steps of the above-mentioned method embodiment stored in the memory.

[0102] Figure 16 A hardware structure diagram of a detection device according to an embodiment of the present invention is provided. The detection device 1600 includes: at least one processor 1601, a memory 1602, and optionally, the detection device 1600 may further include at least one communication interface 1603. The various components in the detection device 1600 are coupled together via a bus system 1604. It is understood that the bus system 1604 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 1604 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 16 Various components are labeled as a bus system 1604 .

[0103] It is understood that memory 1602 can be volatile memory or non-volatile memory, or can include both volatile and non-volatile memory. Non-volatile memory can include read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); magnetic surface memory can include magnetic disk storage or tape storage. Volatile memory can include random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memory 1602 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0104] The memory 1602 in the embodiment of the present invention is used to store various types of data to support the operation of the detection device 1600. Examples of such data include any computer program for operating on the detection device 1600. The program for implementing the method of the embodiment of the present invention may be included in the memory 1602.

[0105] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 1601. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in the processor or by software instructions. The above processor may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium located in a memory. The processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0106] In an exemplary embodiment, the detection device 1600 can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to perform the above method.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0108] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0109] In addition, the functional units in the embodiments of the present invention can all be integrated into one processing module, or each unit can be a separate unit, or two or more units can be integrated into one unit; the above-mentioned integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units. It can be understood by those skilled in the art that all or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions, and the above-mentioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiments; and the above-mentioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks or optical disks.

[0110] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0111] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0112] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0113] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for detecting the ability of insulating bearings to resist high-frequency alternating current corrosion, characterized in that: Applicable to a detection system comprising a measuring device and a testing device; the measuring device is arranged at a non-transmission position of each traction motor; the bearing in each traction motor is arranged in the testing device, and the method comprises: Acquiring shaft voltage data of at least one bearing to be tested by the measuring device; Simulating the long-duration high-frequency AC voltage data in the shaft voltage data and the testing device to test each of the at least one bearing to be tested, to obtain a voltage waveform corresponding to each bearing to be tested; Determining a first curve relationship based on the voltage waveform and the thickness parameters of the insulation layer corresponding to each bearing to be tested at different frequencies; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested; A second curve relationship is determined based on the thickness parameters corresponding to each bearing to be tested at different frequencies and the first curve relationship; the second curve relationship represents the relationship between the thickness parameter and the voltage amplitude; the second curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

2. The method according to claim 1, characterized in that The step of obtaining shaft voltage data of at least one bearing to be measured by the measuring device includes: The first voltage data and the second voltage data corresponding to the rotor and the base of the motor are acquired respectively by the measuring device; and the shaft voltage data is determined according to the first voltage data and the second voltage data.

3. The method according to claim 1, characterized in that The method further comprises: The shaft voltage data is decomposed to obtain the long-duration high-frequency AC voltage data.

4. The method according to claim 1, wherein The simulating of the long-duration high-frequency AC voltage data in the shaft voltage data and the testing device testing each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested includes: Using the long-duration and high-frequency AC voltage data in the shaft voltage data to simulate the actual voltage of each bearing to be tested; Each bearing to be tested in the at least one bearing to be tested is tested on the testing device based on the actual voltage to obtain a voltage waveform corresponding to each bearing to be tested.

5. The method according to claim 1, wherein The determining the first curve relationship based on the voltage waveform and the thickness parameters of the insulation layer corresponding to each bearing to be tested at different frequencies includes: Determine, based on the voltage waveform, a first leakage current of each bearing to be tested in an online operating state; the first leakage current represents a current generated by the corresponding insulation layer of each bearing to be tested when the bearing to be tested operates in the voltage waveform; determining the impedance parameters of each bearing to be tested at different frequencies according to the thickness of the insulating layer; The first curve relationship is determined based on the first leakage current and the impedance parameter of each bearing to be tested.

6. The method according to claim 5, characterized in that The determining the first curve relationship based on the first leakage current and the impedance parameter of each bearing to be tested includes: determining a safety limit value corresponding to the first leakage current based on the first leakage current; The first curve relationship is determined based on the safety limit value and the impedance parameter of each bearing to be tested.

7. A design method for high-frequency alternating current corrosion resistance, characterized in that: include: Obtain the bearing voltage value of the traction motor in the train; determining the thickness of the insulation layer corresponding to the bearing of the traction motor in the train according to the relationship between the bearing voltage value and the second curve; Wherein, the second curve relationship is obtained based on the method according to any one of claims 1 to 6.

8. A detection system for the ability of insulating bearings to resist high-frequency alternating current corrosion, characterized in that: The detection system includes: a measuring device, a testing device and a processing device; the measuring device is arranged at a non-transmission position of each traction motor; the bearing in each traction motor is arranged in the testing device; wherein, The measuring device is used to obtain shaft voltage data of at least one bearing to be tested; The testing device is used to simulate the long-duration high-frequency AC voltage data in the shaft voltage data and to test each of the at least one bearing to be tested to obtain a voltage waveform corresponding to each bearing to be tested; The processing device is used to determine a first curve relationship based on the voltage waveform and the thickness parameter of the insulating layer corresponding to each bearing to be tested; the first curve relationship represents the relationship between the voltage amplitude and frequency of each bearing to be tested; and is also used to determine a second curve relationship based on the thickness parameter and the first curve relationship; the second curve relationship is used to design the thickness of the insulating layer corresponding to different bearings in the motor.

9. A storage medium, characterized in that: The storage medium stores a computer program; when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A device for testing the ability of insulating bearings to resist high-frequency alternating current corrosion, characterized in that: The detection device comprises: a processor and a memory for storing a computer program that can be run on the processor, wherein the processor executes the steps of the method according to any one of claims 1 to 6 when running the computer program.

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