A method, system, device, and storage medium for detecting an insulated bearing

Abstract

The application discloses a kind of detection methods, systems, equipment and storage medium of short-time surge impact voltage resistance of insulating bearing, wherein the method comprises: at least one bearing voltage data of the measured bearing is obtained by the measuring device;Simulate short-time surge impact voltage data in the shaft voltage data, and the test device is tested to each measured bearing in the at least one measured bearing, and the voltage waveform corresponding to each measured bearing is obtained;The safety impact voltage corresponding to each measured bearing is determined based on the voltage waveform and the thickness parameter of the insulating layer corresponding to each measured bearing;According to the thickness parameter and the safety impact voltage, first curve relationship is determined;The first curve relationship is used to design the thickness of the insulating layer corresponding to different bearings in the motor.

Description

Technical Field

[0001] This invention relates to the field of electricity, and more particularly to a method, system, device, and storage medium for detecting the resistance of insulated bearings to short-time surge voltage. Background Technology

[0002] In related technologies, the testing methods for bearing insulation capability are relatively limited and cannot accurately assess the bearing's AC resistance. The most common testing method uses a voltage that differs from the shaft voltage that the bearing experiences during actual operation, and current testing methods cannot simulate the measured shaft voltage for targeted testing.

[0003] During online operation, the opening and closing of the pantograph and main circuit breaker cause short-term surge voltages at both ends of the traction motor. These surge voltages are characterized by low frequency and high amplitude. Excessive surge voltage causes a large instantaneous current to flow through the bearing. This current can break down the extremely thin oil film in the rolling contact area, generating sparks and causing localized melting damage to the contact surface. This results in arc discharge pitting, causing electrolytic erosion of the bearing raceway and steel balls, increasing the coefficient of friction, accelerating mechanical wear, and ultimately leading to abnormal bearing heating, cage deformation or breakage, and finally, failure. Figure 1 A schematic diagram of a bearing failure provided for related technologies. Figure 1 The circular pits in the bearing are caused by a surge voltage that causes a large instantaneous current to pass through the bearing, which breaks down the insulation layer.

[0004] However, current methods for assessing bearings' resistance to surge voltage are insufficient, and there are no suitable verification methods, making it impossible to design insulation coatings specifically for bearings. There is currently no effective solution to these problems. Summary of the Invention

[0005] To address the existing technical problems, the main objective of this invention is to provide a method, system, device, and storage medium for detecting surge voltage resistance in insulated bearings.

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

[0007] In a first aspect, the present invention provides a method for detecting the surge voltage resistance of insulated bearings, applied to a detection system including a measuring device and a testing device; the measuring device is disposed at a non-drive position of each traction motor; the bearing in each traction motor is disposed in the testing device, and the method includes:

[0008] The measuring device is used to acquire shaft voltage data for at least one bearing under test.

[0009] The short-time surge voltage data in the simulated shaft voltage data and the test device are used to test each of the at least one bearing under test to obtain the voltage waveform corresponding to each bearing under test.

[0010] The safe impulse voltage for each bearing under test is determined based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test.

[0011] The first curve relationship is determined based on the thickness parameter and the safety impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

[0012] In the above scheme, acquiring shaft voltage data of at least one bearing under test through the measuring device includes:

[0013] The measuring device acquires first voltage data and second voltage data corresponding to the rotor and frame distribution of the motor; the shaft voltage data is determined based on the first voltage data and the second voltage data.

[0014] In the above scheme, determining the shaft voltage data based on the first voltage data and the second voltage data includes:

[0015] The potential difference between the rotor and the frame of the motor is determined based on the first voltage data and the second voltage data; the shaft voltage data is determined based on the potential difference.

[0016] In the above scheme, the method further includes:

[0017] The shaft voltage data is decomposed to obtain the short-time surge voltage data.

[0018] In the above scheme, the simulation of short-time surge voltage data in the shaft voltage data and the testing device testing each of the at least one bearing under test to obtain the voltage waveform corresponding to each bearing under test include:

[0019] The actual voltage of each bearing under test is simulated using the short-time surge voltage data in the shaft voltage data.

[0020] Based on the actual voltage, each of the at least one bearing under test is tested on the testing device to obtain the voltage waveform corresponding to each bearing under test.

[0021] In the above scheme, determining the safe impulse voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test includes:

[0022] The leakage current of each bearing under test in online operation is determined based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; the leakage current characterizes the current generated by the insulation layer corresponding to each bearing under test when it is in operation;

[0023] The safe impact voltage corresponding to each bearing under test is determined based on the leakage current.

[0024] Secondly, the present invention also provides a design method for resisting short-time surge voltage, comprising:

[0025] Obtain the bearing voltage value of the traction motor in the train;

[0026] The thickness of the insulation layer corresponding to the bearing of the traction motor in the train is determined based on the bearing voltage value and the relationship of the first curve.

[0027] The first curve relationship is obtained based on any of the above-described method embodiments.

[0028] Thirdly, the present invention also provides a detection system for the resistance of insulated bearings to short-time surge voltage, the system comprising a measuring device, a testing device, and a processing device; the measuring device is disposed at the non-drive position of each traction motor; the bearing in each traction motor is disposed in the testing device; wherein...

[0029] The measuring device is used to acquire shaft voltage data of at least one bearing under test;

[0030] The testing device is used to simulate the short-time surge voltage data in the shaft voltage data and to test the at least one bearing to obtain the voltage waveform corresponding to each bearing under test.

[0031] The processing device is used to determine the safe impact voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; it is also used to determine a first curve relationship based on the thickness parameter and the safe impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

[0032] Fourthly, embodiments of the present invention provide a storage medium storing a computer program; when the computer program is executed by a processor, it implements the steps of any of the methods described above.

[0033] Fifthly, embodiments of the present invention provide a detection device for the resistance of an insulating bearing to short-time surge voltage. The detection device includes: a processor and a memory for storing a computer program that can run on the processor, wherein the processor, when running the computer program, performs the steps of any of the methods described above.

[0034] This invention provides a method, system, device, and storage medium for detecting the resistance of insulated bearings to short-time surge voltage. The method is applied to a detection system including a measuring device and a testing device; the measuring device is positioned at a non-drive position of each traction motor; the bearing in each traction motor is positioned within the testing device. The method includes: acquiring shaft voltage data of at least one bearing under test using the measuring device; simulating short-time surge voltage data from the shaft voltage data and testing each of the at least one bearing under test using the testing device to obtain a voltage waveform corresponding to each bearing under test; determining a safe surge voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; and determining a first curve relationship based on the thickness parameter and the safe surge voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor. Using the technical solution of this invention, the shaft voltage data of at least one bearing under test is obtained through the measuring device; a first curve relationship is determined based on the thickness parameter and the safety impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor; it can simulate the measured shaft voltage for detection, thereby realizing the targeted design of the thickness of the insulation coating of the bearing. Attached Figure Description

[0035] Figure 1 A schematic diagram of a bearing failure provided for related technologies;

[0036] Figure 2 A schematic diagram for measuring the bearings of an electric motor, provided for related technologies;

[0037] Figure 3 A schematic flowchart illustrating a method for detecting the resistance of an insulated bearing to short-time surge voltage according to an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of a shaft voltage testing fixture provided in an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of an actual test voltage waveform provided in an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of an enlarged actual test voltage waveform provided in an embodiment of the present invention;

[0041] Figure 7 A schematic diagram of a simulated actual test voltage waveform provided for an embodiment of the present invention;

[0042] Figure 8 A schematic diagram of an amplified simulated actual test voltage waveform provided in an embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram illustrating the relationship between insulation layer thickness and the safe voltage limit for short-time surges, provided as an embodiment of the present invention.

[0044] Figure 10 This is a schematic diagram of a bearing tip carbon brush structure provided in an embodiment of the present invention;

[0045] Figure 11 A schematic diagram of an axis voltage measuring device provided in an embodiment of the present invention;

[0046] Figure 12 A schematic diagram of the short-time surge voltage in the waveform of the shaft voltage provided in an embodiment of the present invention;

[0047] Figure 13 A flowchart illustrating a design method for resisting short-time surge voltage provided in an embodiment of the present invention;

[0048] Figure 14 A flowchart illustrating a specific implementation method for resisting short-time surge voltage in an insulated bearing, as provided in an embodiment of the present invention;

[0049] Figure 15 A flowchart illustrating the calculation process for the resistance of an insulated bearing to short-time surge voltage, provided in an embodiment of the present invention;

[0050] Figure 16 A schematic diagram of a detection system for short-time surge voltage resistance of an insulated bearing provided in an embodiment of the present invention;

[0051] Figure 17 This is a schematic diagram of a hardware structure for a detection device according to an embodiment of the present invention. Detailed Implementation

[0052] Regarding the voltage withstand capability of bearings during operation, relevant technologies commonly use DC withstand voltage or AC withstand voltage and insulation resistance for testing, such as... Figure 2 As shown, Figure 2This diagram illustrates a method for measuring the bearing resistance of an electric motor. The method involves attaching tin foil or copper foil tape to the bearing insulation layer or installing a clamping fixture to measure the bearing's insulation resistance and DC or AC withstand voltage. However, the power supply voltage used in this method differs from the shaft voltage experienced by the traction motor during operation. Actual shaft voltages include long-duration high-frequency AC voltage and short-duration surge voltage. Current testing methods cannot simulate actual shaft voltages and therefore cannot accurately assess the failure risk of insulated bearings in vehicles in operation.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the specific technical solutions of the invention will be further described in detail below with reference to the accompanying drawings of 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.

[0054] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0055] Figure 3 This is a schematic flowchart illustrating a method for detecting the short-time surge voltage resistance of an insulated bearing, provided in an embodiment of the present invention. Figure 3 As shown, the method is applied to a detection system including a measuring device and a testing device; the measuring device is disposed at the non-drive position of each traction motor; the bearing in each traction motor is disposed in the testing device, and the method includes:

[0056] S301: Obtain shaft voltage data of at least one bearing under test through the measuring device.

[0057] In this embodiment, the measuring device is used to measure the shaft voltage data of the bearing, and is not limited thereto. 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 under test. The bearing under test can be a bearing of different models.

[0058] S302: Using the short-time surge voltage data in the shaft voltage data and the testing device, each of the at least one bearing under test is tested to obtain the voltage waveform corresponding to each bearing under test.

[0059] In this embodiment, the shaft voltage data includes high-frequency AC voltage data and short-time surge voltage data. The testing device is an apparatus for testing the bearing and is not limited thereto. As an example, the testing device can be a shaft voltage testing fixture. Figure 4 This is a schematic diagram of a shaft voltage testing fixture provided in an embodiment of the present invention. Figure 4In the middle, 1-humidity chamber, 2-terminal block, 3-test lead, 4-pulse width modulation power supply, 5-test shaft, 6-bearing #1 test fixture one, 7-bearing #1, 8-bearing #1 test fixture two, 9-bearing #2 test fixture two, 10-bearing #2, 11-bearing #2 test fixture one, 12-current clamp, 13-high frequency oscilloscope.

[0060] In this embodiment, the voltage waveform represents the relationship between time and voltage amplitude, and the voltage waveform can be the waveform of the aforementioned test power supply. For ease of understanding, an example is provided here. Figure 5 This is a schematic diagram of an actual test voltage waveform provided in an embodiment of the present invention, such as... Figure 5 As shown, the horizontal axis represents time, and the vertical axis represents voltage amplitude. Figure 6 This is a schematic diagram of an enlarged actual test voltage waveform provided in an embodiment of the present invention. The horizontal axis represents time, the vertical axis represents voltage amplitude, and the voltage rise time is 1µs. Figure 6 It is Figure 5 The horizontal axis time is set to obtain the time. Figure 7 This is a schematic diagram of a simulated actual test voltage waveform provided by an embodiment of the present invention. The horizontal axis represents time, and the vertical axis represents voltage amplitude. Figure 7 It is Figure 5 The waveform shown is a simulated voltage waveform after the above-mentioned test fixture is connected. Figure 8 This is a schematic diagram of an amplified simulated actual test voltage waveform provided by an embodiment of the present invention. The horizontal axis represents time, the vertical axis represents voltage amplitude, and the voltage rise time is 1µs. Figure 8 It is Figure 7 The horizontal axis time is set to obtain the value.

[0061] S303: Determine the safe impact voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test.

[0062] In this embodiment, the thickness parameter refers to the different thickness values ​​of the insulation layer corresponding to each bearing. The safety surge voltage is a safety voltage that resists short-term surge impacts.

[0063] It should be noted that in this embodiment, different safe impulse voltages are obtained according to different insulation layer thicknesses and voltage waveforms. However, to obtain safe impulse voltages with the same insulation layer thickness and voltage waveform, repeated experiments are required. The final safe impulse voltage is the average value of the safe impulse voltages obtained from multiple experiments.

[0064] S304: Determine the first curve relationship based on the thickness parameter and the safety impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

[0065] In this embodiment, the first curve relationship characterizes the relationship between the thickness parameter and the safe impact voltage. For example... Figure 9 As shown, Figure 9 This is a schematic diagram illustrating the relationship between insulation layer thickness and the safe voltage limit for short-time surges, provided by an embodiment of the present invention. The horizontal axis represents the insulation layer thickness, and the vertical axis represents the safe voltage limit for short-time surges.

[0066] It should be noted that different insulation layer thicknesses result in different safe impulse voltages. The first curve relationship is obtained by fitting the correspondence between insulation layer thickness and safe impulse voltage.

[0067] The detection method provided in this embodiment of the invention acquires shaft voltage data of at least one bearing to be tested through the measuring device; determines a first curve relationship based on the thickness parameter and the safety impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor; it can simulate the measured shaft voltage for detection, thereby realizing the targeted design of the thickness of the insulation coating of the bearing.

[0068] In an optional embodiment of the present invention, the step of acquiring shaft voltage data of at least one bearing under test through the measuring device includes: acquiring first voltage data and second voltage data corresponding to the rotor and frame 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, the first voltage data is the voltage of the motor rotor; the second voltage data is the voltage of the motor frame. Figure 10 This is a schematic diagram of a bearing tip carbon brush structure provided in an embodiment of the present invention. Figure 10 In the diagram, 1 is the test bolt, 2 is the top shaft carbon brush, and 3 is the test lead. Figure 11 This is a schematic diagram of a shaft voltage measuring device provided in an embodiment of the present invention.

[0070] For ease of understanding, here is an example where the shaft voltage measuring device is connected to both the motor rotor and the frame. Figure 9 In the middle, the inner side of the bearing insulation layer is connected to the motor rotor via the test line ① of the top carbon brush at the shaft end, which is then connected to the testing instrument. Figure 10 In the test instrument, the outer side of the bearing insulation layer is connected to the motor frame via test line ②.

[0071] In this embodiment of the invention, an axis voltage measuring device is used. The device has a compact structure, occupies little space, is replaceable online, and is easy to maintain. The test line has low impedance, and the measured values ​​are accurate.

[0072] In an optional embodiment of the present invention, determining the shaft voltage data based on the first voltage data and the second voltage data includes: determining the potential difference between the rotor and the frame of the motor based on the first voltage data and the second voltage data; and determining the shaft voltage data based on the potential difference.

[0073] In this embodiment, for ease of understanding, an example is given here to simulate the shaft voltage applied to both sides of the bearing insulating coating by testing the potential difference between the motor rotor and the frame.

[0074] In an optional embodiment of the present invention, the method further includes: decomposing the shaft voltage data to obtain the short-time surge voltage data.

[0075] In this embodiment, the decomposition of the shaft voltage data involves decomposing the waveform of the shaft voltage using analysis software, such as an oscilloscope recorder like the DL850. For ease of understanding, an example is provided here: by decomposing the shaft voltage waveform using analysis software, the short-time surge voltage experienced by the bearing during operation is obtained (this portion of the shaft voltage only occurs during static pantograph raising / lowering, merging the main circuit breaker, and phase transition processes). This short-time surge voltage can be combined with... Figure 12 To understand, Figure 12 This is a schematic diagram of the short-time surge voltage in the waveform of the shaft voltage provided in an embodiment of the present invention.

[0076] In an optional embodiment of the present invention, the step of simulating the short-time surge voltage data in the shaft voltage data and testing each of the at least one bearing under test using the testing device to obtain the voltage waveform corresponding to each bearing under test includes: simulating the actual voltage of each bearing under test using the short-time surge voltage data in the shaft voltage data; and testing each of the at least one bearing under test using the testing device based on the actual voltage to obtain the voltage waveform corresponding to each bearing under test.

[0077] In this embodiment, for ease of understanding, an example is given here. When simulating the bearing's resistance to short-time surge voltage on the test bench, the test power supply is set according to the short-time surge voltage in the voltage data. The power supply voltage amplitude and rise rate are adjustable.

[0078] In an optional embodiment of the present invention, determining the safe impulse voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test includes: determining the leakage current of each bearing under test in the online operating state based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; the leakage current characterizes the current generated by the insulation layer corresponding to each bearing under test when it is in operation; and determining the safe impulse voltage corresponding to each bearing under test based on the leakage current.

[0079] In this embodiment, it should be noted that the leakage current of the bearing is tested using a current clamp on the test line. For ease of understanding, an example is given here: the voltage waveform is adjusted according to different bearing insulation layer thicknesses to bring the bearing into operation. During operation, damage to the insulation layer will occur. This damage can be monitored by the leakage current. The leakage current generated during the test is detected using a current clamp, thereby obtaining the corresponding safety limit value of the short-time surge voltage for different bearing insulation layer thicknesses.

[0080] This invention also provides a design method for resisting short-time surge voltage. Figure 13 This is a flowchart illustrating a design method for resisting short-time surge voltage according to an embodiment of the present invention. Figure 13 As shown, the method includes the following steps:

[0081] S1301: Obtain the bearing voltage value of the traction motor in the train;

[0082] S1302: Determine the insulation layer thickness corresponding to the bearing of the traction motor in the train based on the bearing voltage value and the first curve relationship;

[0083] The first curve relationship is obtained based on the above method embodiment.

[0084] In this embodiment, the first curve relationship characterizes the relationship between the insulation layer thickness and the safety limit of the short-time surge safety impulse voltage. For ease of understanding, an example is provided here: the shaft voltage value of the traction motor is obtained, and then the insulation layer thickness corresponding to the voltage value in the first curve relationship is determined. Using the design method of this embodiment, an optimal bearing insulation layer thickness scheme can be designed for different vehicle axle voltage environments.

[0085] To facilitate understanding, an example is provided here. To verify the ability of an insulated bearing to withstand high-frequency AC current during operation, a test method for testing the bearing's resistance to short-term surge voltage is designed. First, a carbon brush-structured shaft voltage measuring device is installed in the non-drive section of the traction motor to detect the shaft voltage experienced by the traction motor during operation. The waveform of the shaft voltage is decomposed using analysis software to obtain the short-term surge voltage experienced by the bearing during operation (this portion of the shaft voltage only occurs during static pantograph raising / lowering, main circuit breaker merging, and phase transition processes). Simultaneously, a bearing test fixture is designed to completely enclose the bearing, with its lubrication state and temperature / humidity simulating the bearing's online operating conditions as closely as possible. The inner rings of the bearings at both ends are connected via a test shaft, and the outer rings are connected in parallel to a test power supply. The test power supply simulates the type of shaft voltage experienced by the vehicle during operation; the voltage amplitude and rate of rise are adjustable. The bearing's resistance to surge AC current is tested through the short-term surge voltage test.

[0086] For ease of understanding, embodiments of the present invention provide a specific test method for determining the short-time surge voltage resistance capability of traction motor insulation layer bearings. Figure 14 This is a flowchart illustrating a specific implementation method for an insulated bearing to resist short-time surge voltage according to an embodiment of the present invention, as shown below. Figure 14 As shown, shaft voltage testing fixtures and experimental fixtures are designed according to different structures of traction motors. The short-time surge 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 bearing short-time surge voltage resistance is simulated on the test bench. The operating status of the online train set is analyzed according to the test structure and the most suitable bearing insulation layer thickness is calculated to realize the positive design of the insulation capacity of the insulated bearing.

[0087] For ease of understanding, embodiments of the present invention provide a method for calculating the optimal thickness of the bearing insulation layer. Figure 15 This is a flowchart illustrating the calculation process for the short-time surge voltage resistance of an insulated bearing, as provided in an embodiment of the present invention. During the experiment, the effects of environmental factors such as different levels of lubricant contamination, temperature, and humidity are simulated. The safe voltage values ​​for short-time surge resistance of bearings with different insulation layer thicknesses are tested. Based on the experimental structure, a curve is fitted between the bearing insulation layer thickness and the safe voltage value for short-time surges to derive the optimal bearing insulation layer coating thickness design scheme under different vehicle axle voltage environments.

[0088] Based on the same inventive concept as described above, Figure 16This is a schematic diagram of a detection system for the resistance of insulated bearings to short-time surge voltage provided in an embodiment of the present invention. The system 1600 includes a measuring device 1601, a testing device 1602, and a processing device 1603. The measuring device 1601 is disposed at the non-drive position of each traction motor. The bearing in each traction motor is disposed in the testing device 1602.

[0089] The measuring device 1601 is used to acquire shaft voltage data of at least one bearing to be tested;

[0090] The testing device 1602 is used to simulate the short-time surge voltage data in the shaft voltage data and to test the at least one bearing to obtain the voltage waveform corresponding to each bearing under test.

[0091] The processing device 1603 is used to determine the safe impact voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; it is also used to determine a first curve relationship based on the thickness parameter and the safe impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in the motor.

[0092] It should be noted that the actual structural diagram of the measuring device 1601 can be seen in conjunction with the preceding diagram. Figure 11 To understand this, the actual structural diagram of the testing device 1602 can be combined with the preceding... Figure 4 As shown, the processing device 1603 is connected to the testing device 1602. The connection relationship is not limited here. As an example, the processing device 1603 can be electrically connected to the testing device 1602.

[0093] In some embodiments, the measuring device 1601 is further configured to acquire first voltage data and second voltage data corresponding to the rotor and frame of the motor, respectively; and determine the shaft voltage data based on the first voltage data and the second voltage data.

[0094] In some embodiments, the measuring device 1601 is further configured to determine the potential difference between the rotor and the frame of the motor based on the first voltage data and the second voltage data; and to determine the shaft voltage data based on the potential difference.

[0095] In some embodiments, the system 1600 further includes an analysis device for decomposing the shaft voltage data to obtain the short-time surge voltage data.

[0096] In some embodiments, the testing device 1602 is further configured to simulate the actual voltage of each bearing under test using short-time surge voltage data in the shaft voltage data; and to test each of the at least one bearing under test on the testing device based on the actual voltage to obtain the voltage waveform corresponding to each bearing under test.

[0097] In some embodiments, the processing device 1603 is further configured to determine the leakage current of each bearing under test in online operation state based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; the leakage current characterizes the current generated by the insulation layer corresponding to each bearing under test when it is in operation; and determine the safety impulse voltage corresponding to each bearing under test based on the leakage current.

[0098] In addition, other contents have been described in detail above and can be referred to above, so they will not be repeated here.

[0099] This invention also provides a storage medium storing a computer program thereon. When the computer program is executed by a processor, it implements the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0100] This invention also provides a detection device for the resistance of an insulating bearing to short-time surge voltage. The detection device includes a processor and a memory for storing a computer program that can run on the processor. When the processor runs the computer program, it executes the steps of the method embodiments described above stored in the memory.

[0101] Figure 17 This is a schematic diagram of a hardware structure for a detection device according to an embodiment of the present invention. The detection device 1700 includes at least one processor 1701 and a memory 1702. Optionally, the detection device 1700 may further include at least one communication interface 1703. The various components in the detection device 1700 are coupled together through a bus system 1704. It is understood that the bus system 1704 is used to realize the connection and communication between these components. In addition to a data bus, the bus system 1704 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 17 The various components are all labeled as Bus System 1704.

[0102] It is understood that memory 1702 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be 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 disc, or compact disc read-only memory (CD-ROM); magnetic surface memory can be disk storage or magnetic tape storage. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but 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), Sync Link Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memory 1702 described in this embodiment of the invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0103] The memory 1702 in this embodiment of the invention is used to store various types of data to support the operation of the detection device 1700. Examples of such data include any computer program for operation on the detection device 1700, and programs implementing the methods of this embodiment of the invention may be included in the memory 1702.

[0104] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 1701. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The 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 methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium, which is located in memory. The processor reads information from the memory and, in conjunction with its hardware, completes the steps of the aforementioned method.

[0105] In an exemplary embodiment, the detection device 1700 may 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 methods described above.

[0106] 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 illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0107] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0108] Furthermore, in the various embodiments of the present invention, all functional units can 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 integrated unit can be implemented in hardware or in a combination of hardware and software functional units. Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0109] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

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

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

[0112] 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 variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for detecting the resistance of an insulated bearing to short-time surge voltage, characterized in that, A detection system comprising a measuring device and a testing device; wherein the measuring device is disposed at a non-drive position of each traction motor; and wherein a bearing in each traction motor is disposed in the testing device, the method comprising: The measuring device is used to acquire shaft voltage data for at least one bearing under test. The actual voltage of each bearing under test is simulated using the short-time surge voltage data in the shaft voltage data; based on the actual voltage, each of the at least one bearing under test is tested on the test device to obtain the voltage waveform corresponding to each bearing under test. The safe impulse voltage for each bearing under test is determined based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test. The first curve relationship is determined based on the thickness parameter and the safety impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in each traction motor.

2. The method according to claim 1, characterized in that, The acquisition of shaft voltage data for at least one bearing under test via the measuring device includes: The measuring device acquires first voltage data and second voltage data corresponding to the rotor and frame of each traction motor, respectively; and determines the shaft voltage data based on the first voltage data and the second voltage data.

3. The method according to claim 2, characterized in that, Determining the shaft voltage data based on the first voltage data and the second voltage data includes: The potential difference between the rotor and the frame of each traction motor is determined based on the first voltage data and the second voltage data; the shaft voltage data is determined based on the potential difference.

4. The method according to claim 1, characterized in that, The method further includes: The shaft voltage data is decomposed to obtain the short-time surge voltage data.

5. The method according to claim 1, characterized in that, The determination of the safe impulse voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test includes: The leakage current of each bearing under test in online operation is determined based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; the leakage current characterizes the current generated by the insulation layer corresponding to each bearing under test when it is in operation; The safe impact voltage corresponding to each bearing under test is determined based on the leakage current.

6. A design method for resisting short-time surge voltage, characterized in that, include: Obtain the bearing voltage value of the traction motor in the train; The thickness of the insulation layer corresponding to the bearing of the traction motor in the train is determined based on the bearing voltage value and the relationship of the first curve. The first curve relationship is obtained based on the method described in any one of claims 1 to 5.

7. A detection system for the resistance of insulated bearings to short-time surge voltage, characterized in that, The system includes a measuring device, a testing device, and a processing device; the measuring device is located at the non-drive position of each traction motor; the bearing in each traction motor is housed in the testing device; wherein... The measuring device is used to acquire shaft voltage data of at least one bearing under test; The testing device is used to simulate the actual voltage of each bearing under test using the short-time surge voltage data in the shaft voltage data; and to test each of the at least one bearing under test on the testing device based on the actual voltage to obtain the voltage waveform corresponding to each bearing under test. The processing device is used to determine the safe impact voltage corresponding to each bearing under test based on the voltage waveform and the thickness parameter of the insulation layer corresponding to each bearing under test; and to determine a first curve relationship based on the thickness parameter and the safe impact voltage; the first curve relationship is used to design the thickness of the insulation layer corresponding to different bearings in each traction motor.

8. A storage medium, characterized in that, The storage medium stores a computer program; when the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

9. A testing device for the resistance of insulated bearings to short-time surge voltage, characterized in that, The detection device includes: a processor and a memory for storing a computer program that can run on the processor, wherein, when the processor runs the computer program, it performs the steps of the method according to any one of claims 1 to 5.

Images