Current-carrying friction coupling damage decoupling detection device and method based on in-situ cooling

Abstract

The invention discloses a current-carrying friction coupling damage decoupling detection device and method based on in-situ cooling, and relates to the technical field of friction wear experiment devices.The current-carrying friction coupling damage decoupling detection device comprises a rolling current-carrying friction wear performance testing device body, a cooling device and a temperature detection device; the rolling current-carrying frictional wear performance testing device body comprises a driving rotating wheel, a driven rotating wheel and an electric contact piece, the electric contact piece is connected between the driving rotating wheel and the driven rotating wheel in a rolling manner, the driving rotating wheel rotates to drive the electric contact piece and the driven rotating wheel to rotate, and the driving rotating wheel, the electric contact piece and the driven rotating wheel are matched with a power supply to form a rolling friction current-carrying loop; the cooling device is used for performing in-situ cooling on the contact positions of the electric contact piece and the driving rotating wheel and the driven rotating wheel respectively; the temperature measuring device is used for measuring the temperature of the contact positions of the electric contact piece and the driving rotating wheel and the driven rotating wheel, the structure is simple, the use is convenient, and the leading mechanism of rolling current-carrying friction coupling damage under different working conditions can be effectively determined.

Description

Technical Field

[0001] The invention relates to the technical field of friction and wear experimental devices, and in particular to a current-carrying friction coupling damage decoupling detection device and method based on in-situ cooling. Background Art

[0002] In the application of rolling collector rings, there are three core technologies of mechanical wear, thermal wear and arc wear in rolling current-carrying friction. The core technology of high-power, long-life and high-reliability collector rings seriously restricts the development of my country's high-end weapons and equipment, major aerospace engineering and other fields. The basic problem behind this key technology is the damage mechanism of current-carrying friction. However, a typical structural feature of current-carrying friction is that the friction surface and the current-carrying surface are coplanar, and then three interacting thermal effects of friction heat, contact resistance heat and arc heat are formed on the interface, resulting in stress concentration, current density concentration and heat flux density concentration. Multi-field coupling. These energy fields undergo complex physical processes such as aggregation, transmission, transformation, absorption and divergence on the current-carrying friction interface, resulting in multi-scale physical and chemical reactions such as transfer, transformation and transformation of interface materials, involving mechanical wear caused by friction heat, electrical wear caused by contact resistance heat and arc, and the composite damage process of strong coupling between them. Because the key control variables affecting the damage are cross-coupled together, the current experimental technology based on the single control variable method to study the composite damage of current-carrying friction faces great challenges, and it is difficult to decouple the contribution ratio of electrical and thermal factors to the composite damage. Finding out the mechanism and proportion of the effects of electrical and thermal energy fields on current-carrying friction composite damage can provide a theoretical basis for high-end collector ring structure design, material selection, and process optimization.

[0003] However, there is currently a lack of effective devices and methods to determine which of the three types of wear is the dominant mechanism, which brings difficulties to high-end collector ring structure design, material selection, process optimization, etc. Summary of the invention

[0004] The purpose of the present invention is to provide a current-carrying friction coupling damage decoupling detection device and method based on in-situ cooling to solve the problems existing in the above-mentioned prior art. It has a simple structure, is easy to use, and can effectively determine the dominant mechanism of rolling current-carrying friction coupling damage under different working conditions.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a current-carrying friction coupling damage decoupling detection device based on in-situ cooling, comprising: a rolling current-carrying friction and wear performance testing device body, a cooling device and a temperature detection device, the rolling current-carrying friction and wear performance testing device body comprising a driving wheel, a driven wheel and an electric contact, the electric contact rollingly connected between the driving wheel and the driven wheel, the rotation of the driving wheel can drive the electric contact and the driven wheel to rotate, and the driving wheel, the electric contact and the driven wheel can form a rolling friction current-carrying circuit in combination with a power supply; the cooling device is used for in-situ cooling of the positions where the electric contact contacts the driving wheel and the driven wheel respectively; the temperature measuring device is used for measuring the temperature of the positions where the electric contact contacts the driving wheel and the driven wheel.

[0007] Preferably, it also includes a temperature controller, which is signal-connected to the temperature detection device to receive the temperature signal measured by the temperature detection device, and can control the cooling device to cool the position where the electrical contact contacts the driving wheel and the driven wheel to a designed temperature.

[0008] Preferably, the cooling device includes a compressed air source, a first nozzle, a first nozzle, a second nozzle and a second nozzle. The compressed air source is fixedly connected to the main body of the rolling current-carrying friction and wear performance testing device. One end of the first nozzle is used to connect and communicate with the compressed air source, and the other end is used to connect and communicate with the first nozzle. The first nozzle is used to align with the contact position between the electrical contact and the driving rotor so as to blow the gas delivered by the compressed air source to the contact position between the electrical contact and the driving rotor and perform in-situ cooling. The second nozzle is used to align with the contact position between the electrical contact and the driven rotor so as to blow the gas delivered by the compressed air source to the contact position between the electrical contact and the driven rotor and perform in-situ cooling.

[0009] Preferably, it also includes a nozzle main pipe and a pressure regulating valve, one end of the nozzle main pipe is used to connect and communicate with the first nozzle and the second nozzle, and the other end is used to connect and communicate with the pressure regulating valve, and the end of the pressure regulating valve away from the nozzle main pipe is used to connect and communicate with the compressed air source.

[0010] Preferably, it also includes a first bracket and a second bracket, the bottom of the first bracket is used to be fixedly connected to the body of the rolling current-carrying friction and wear performance testing device, the top of the first bracket is used to be detachably fixedly connected to the first nozzle, the bottom of the second bracket is used to be fixedly connected to the body of the rolling current-carrying friction and wear performance testing device, and the top of the second bracket is used to be detachably fixedly connected to the second nozzle.

[0011] Preferably, the first nozzle and the second nozzle are both serpentine cooling tubes.

[0012] Preferably, the temperature detection device comprises a thermal imaging camera, which is arranged above the electrical contact and aligned with the position where the electrical contact contacts the driving rotor and the driven rotor to monitor the temperature change of the area in real time.

[0013] Preferably, the temperature detection device also includes a thermocouple, which is fixedly connected to the body of the rolling current-carrying friction and wear performance testing device and is arranged at a position where the electrical contact piece contacts the driving rotor and the driven rotor for temperature measurement.

[0014] The present invention also provides a detection method for a current-carrying friction coupling damage decoupling detection device based on in-situ cooling as described in any one of the above items, characterized in that it comprises the following steps:

[0015] S1: Turn on the power supply, operate the rolling current-carrying friction and wear performance test device body under any current parameter, record the evolution of temperature, friction torque and wear amount over time during the rolling current-carrying friction process of any electrical contact, and form a first friction torque evolution curve and a wear amount evolution curve;

[0016] S2: Turn on the power supply, start the cooling device, run the rolling friction and wear performance test device body, set the load and speed conditions consistent with S1, adjust the cooling device, make the temperature of the contact position between the electrical contact and the driving wheel and the driven wheel reach normal temperature, record the evolution of the friction torque and wear amount of the electrical contact with the same specifications as S1 during the rolling current-carrying friction process over time; form the second friction torque evolution curve and wear amount evolution curve;

[0017] S3: Under normal temperature conditions, turn off the power supply, turn off the cooling device, run the rolling friction and wear performance test device body, set the load and speed conditions consistent with S1, and record the evolution of the friction torque and wear amount of the electrical contact parts of the same specifications as in S1 during the rolling current-carrying friction process over time; form the third friction torque evolution curve and wear amount evolution curve;

[0018] S4: Compare and analyze the second friction torque evolution curve and the wear amount evolution curve and the first friction torque evolution curve and the wear amount evolution curve, and make a difference between the two, and the difference forms the fourth friction torque evolution curve and the wear amount evolution curve, the fourth friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure thermal effect on the current-carrying friction and wear performance, and the difference between the second friction torque evolution curve and the wear amount evolution curve and the third friction torque evolution curve and the wear amount evolution curve forms the fifth friction torque evolution curve and the wear amount evolution curve, the fifth friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure current on the current-carrying friction and wear performance, and the third friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure mechanical effect on the current-carrying friction and wear performance;

[0019] The third friction torque evolution curve and the wear amount evolution curve, the fourth friction torque evolution curve and the wear amount evolution curve, and the fifth friction torque evolution curve and the wear amount evolution curve are compared and analyzed to determine the dominant mechanism of rolling current friction coupling damage.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The present invention provides a current-carrying friction coupling damage decoupling detection device and method based on in-situ cooling. A cooling device and a temperature detection device are added to the main body of a rolling current-carrying friction and wear performance testing device, and a first friction torque evolution curve and a wear amount evolution curve are obtained under normal power-on conditions, a second friction torque evolution curve and a wear amount evolution curve are obtained under power-on and cooling conditions, and a third friction torque evolution curve and a wear amount evolution curve are obtained during a normal temperature mechanical wear process. Combined with the data of the above three processes, the proportions of the three types of damage in the current-carrying friction coupling damage, namely mechanical wear, wear induced by pure thermal effects, and wear induced by pure current, are further analyzed, and then the dominant mechanism of the current-carrying friction coupling damage is determined. The device has a reasonable structure and is easy to operate. It can accurately record and analyze various data, and provides basic data and testing methods for material selection, structural design, process and performance optimization of electrical contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the current-carrying friction coupling damage decoupling detection device based on in-situ cooling provided by the present invention;

[0024] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0025] In the figure: 1. Main body of the rolling current friction and wear performance test device; 2. Driving wheel; 3. Driven wheel; 4. Electrical contact; 5. Compressed air source; 6. First nozzle; 7. First nozzle; 8. Pressure regulating valve; 9. First bracket; 10. Nozzle main pipe; 11. Thermal imaging camera. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide a current-carrying friction coupling damage decoupling detection device and method based on in-situ cooling to solve the problems existing in the above-mentioned prior art. It has a simple structure, is easy to use, and can effectively determine the dominant mechanism of rolling current-carrying friction coupling damage under different working conditions.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The present invention provides a current-carrying friction coupling damage decoupling detection device based on in-situ cooling, such as Figures 1-2As shown, it includes: a rolling current-carrying friction and wear performance test device body 1, a cooling device and a temperature detection device, the rolling current-carrying friction and wear performance test device body 1 includes a driving wheel 2, a driven wheel 3 and an electric contact 4, the electric contact 4 is rollingly connected between the driving wheel 2 and the driven wheel 3, the rotation of the driving wheel can drive the electric contact 4 and the driven wheel 3 to rotate, and the driving wheel 2, the electric contact 4 and the driven wheel 3 can form a rolling friction current-carrying circuit with a power supply; the rolling friction current-carrying circuit is; the positive electrode of the power supply, the driving wheel 2, the electric contact 4, the driven wheel 3 The driving wheel 3 and the negative pole of the power supply, or the rolling friction current-carrying circuit is: the positive pole of the power supply, the driven wheel 3, the electrical contact 4, the driving wheel 2, and the negative pole of the power supply. The current line is twisted and gathered at the contact points between the electrical contact 4 and the two wheels, forming a contact resistance, thereby generating contact resistance heat, inducing current density concentration, heat flux density concentration and stress concentration at the contact point, resulting in strong coupling damage to the electrical contact 4 during the current-carrying friction process. The cooling device is used to cool the contact points between the electrical contact 4 and the driving wheel 2 and the driven wheel 3 in situ; the temperature measuring device is used to The temperature of the position where the electrical contact 4 contacts the active rotor 2 and the driven rotor 3 is measured. Through the cooperation of the active rotor 2, the driven rotor 3 and the electrical contact 4, the rolling current-carrying friction in actual applications can be simulated, which provides a reliable experimental basis for studying the dominant mechanism of current-carrying friction and wear. By adding a cooling device and a temperature detection device to the rolling current-carrying friction and wear performance test device body 1, and obtaining the first friction torque evolution curve and the wear evolution curve under normal power-on conditions, and obtaining the second friction torque evolution curve and the wear evolution curve under power-on and cooling conditions, it provides a means for determining the role of wear induced by pure thermal effects in composite wear. The third friction torque evolution curve and the wear evolution curve are obtained in the normal temperature mechanical wear process. Combined with the data of the above three processes, the wear induced by pure thermal effects and mechanical wear are further analyzed, thereby determining the dominant mechanisms of the three composite wears of mechanical wear, pure thermal effect induced wear, and pure current induced wear. The device has a reasonable structure and is easy to operate. It can accurately record and analyze various data, which provides strong support for the performance optimization of the electrical contact 4.

[0030] In a preferred embodiment, the current-carrying friction coupling damage decoupling detection device based on in-situ cooling also includes a temperature controller, which is signal-connected to the temperature detection device to receive the temperature signal measured by the temperature detection device, and can control the cooling device to cool the position where the electrical contact 4 contacts the active rotor 2 and the driven rotor 3 to the designed temperature, thereby achieving precise control of the cooling process, ensuring that the experiment is carried out under the set temperature conditions, and improving the accuracy and repeatability of the experiment.

[0031] In a preferred embodiment, the cooling device includes a compressed air source 5, a first nozzle 6, a first nozzle 7, a second nozzle and a second nozzle. The compressed air source 5 is fixedly connected to the rolling current friction and wear performance testing device body 1. One end of the first nozzle 6 is used to connect and communicate with the compressed air source 5, and the other end is used to connect and communicate with the first nozzle 7. The first nozzle 7 is used to align the position where the conductive electrical contact 4 contacts the active runner 2 so as to blow the gas delivered by the compressed air source 5 to the position where the conductive electrical contact 4 contacts the active runner 2 and perform in-situ cooling. The second nozzle is used to align the position where the conductive electrical contact 4 contacts the driven runner 3 so as to blow the gas delivered by the compressed air source 5 to the position where the conductive electrical contact 4 contacts the driven runner 3 and perform in-situ cooling. By utilizing the combination of the compressed air source 5, the nozzle and the nozzle, precise cooling of a specific position can be achieved, thereby improving the cooling effect and efficiency. The preferred compressed air source 5 is an air compressor.

[0032] In a preferred embodiment, the cooling device also includes a nozzle main pipe and a pressure regulating valve 8, one end of the nozzle main pipe is used to connect and communicate with the first nozzle 6 and the second nozzle, and the other end is used to connect and communicate with the pressure regulating valve 8, and the end of the pressure regulating valve 8 away from the nozzle main pipe is used to connect and communicate with the compressed gas source 5. The pressure regulating valve 8 can adjust the gas pressure, thereby controlling the intensity of cooling to meet different experimental requirements.

[0033] In a preferred embodiment, the cooling device also includes a first bracket 9 and a second bracket, the bottom of the first bracket 9 is used to be fixedly connected to the rolling current-carrying friction and wear performance testing device body 1, the top of the first bracket 9 is used to be detachably fixedly connected to the first nozzle 6, the bottom of the second bracket is used to be fixedly connected to the rolling current-carrying friction and wear performance testing device body 1, and the top of the second bracket is used to be detachably fixedly connected to the second nozzle, and the setting of the bracket makes the position of the nozzle more stable.

[0034] In a preferred embodiment, the first nozzle 6 and the second nozzle are both serpentine cooling tubes. The serpentine cooling tubes' adjustable angle function facilitates optimized arrangement according to actual conditions, thereby improving the flexibility and adaptability of the device and improving the targetedness and effect of cooling.

[0035] In a preferred embodiment, the temperature detection device includes a thermal imaging camera 11, which is used to be arranged above the electrical contact 4 and aligned with the position where the electrical contact 4 contacts the active rotor 2 and the driven rotor 3 to monitor the temperature change in the area in real time. The thermal imaging camera 11 can intuitively display the temperature distribution of the contact area, monitor the temperature change in real time, and provide more accurate data for experimental analysis.

[0036] In a preferred embodiment, the temperature detection device also includes a thermocouple, which is fixedly connected to the rolling current friction and wear performance testing device body 1 and is arranged at the position where the electrical contact 4 contacts the driving wheel 2 and the driven wheel 3 for temperature measurement. The thermocouple can provide accurate temperature measurement values, complement each other with the thermal imaging camera 11, and improve the accuracy and reliability of temperature detection.

[0037] Embodiment 2

[0038] This embodiment also provides a detection method of a current-carrying friction coupling damage decoupling detection device based on in-situ cooling as any one of the first embodiments, comprising the following steps:

[0039] S1: Turn on the power supply, operate the rolling current-carrying friction and wear performance test device body 1 under any current parameter, record the evolution of the temperature, friction torque and wear amount over time during the rolling current-carrying friction process of any electrical contact 4, and form a first friction torque evolution curve and a wear amount evolution curve;

[0040] S2: Turn on the power supply, start the cooling device, run the rolling friction and wear performance test device body, set the load and speed conditions consistent with S1, adjust the cooling device, make the temperature of the contact position between the electrical contact 4 and the driving runner 2 and the driven runner 3 reach room temperature, record the evolution of the friction torque and wear amount of the electrical contact 4 of the same specification as S1 during the rolling current-carrying friction process over time; form a second friction torque evolution curve and a wear amount evolution curve;

[0041] S3: Under normal temperature conditions, turn off the power supply, turn off the cooling device, run the rolling friction and wear performance test device body, set the load and speed conditions consistent with S1, record the evolution of the friction torque and wear amount of the electrical contact 4 of the same specification as S1 during the rolling current-carrying friction process over time; form a third friction torque evolution curve and wear amount evolution curve;

[0042] S4: Compare and analyze the second friction torque evolution curve and the wear amount evolution curve and the first friction torque evolution curve and the wear amount evolution curve, and make a difference between the two, and the difference forms the fourth friction torque evolution curve and the wear amount evolution curve, the fourth friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure thermal effect on the current-carrying friction and wear performance, and the difference between the second friction torque evolution curve and the wear amount evolution curve and the third friction torque evolution curve and the wear amount evolution curve forms the fifth friction torque evolution curve and the wear amount evolution curve, the fifth friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure current on the current-carrying friction and wear performance, and the third friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure mechanical effect on the current-carrying friction and wear performance;

[0043] The third friction torque evolution curve and the wear amount evolution curve, the fourth friction torque evolution curve and the wear amount evolution curve, and the fifth friction torque evolution curve and the wear amount evolution curve are compared and analyzed to determine the dominant mechanism of rolling current friction coupling damage.

[0044] Identifying the dominant wear mechanism in rolling current-carrying friction composite wear can have the following advantages:

[0045] 1. Predict life expectancy

[0046] Determining the dominant wear mechanism can more accurately predict the life of the collector ring. Through in-depth research on the dominant wear mechanism, a corresponding wear model can be established to predict the wear degree and remaining life of the collector ring according to different working conditions and use environments, providing a scientific basis for equipment maintenance and replacement; for example, in some key application fields, such as aerospace, medical equipment, etc., the reliability requirements for collector rings are extremely high, and accurate prediction of life can avoid serious consequences caused by collector ring failure.

[0047] 2. Improve performance

[0048] Take corresponding measures for the dominant wear mechanism, such as selecting suitable electrical contact materials and their processing technology, to improve the performance of the collector ring. For example, if thermal wear is dominant, the temperature of the collector ring can be reduced by improving the heat dissipation design, reducing thermal wear, thereby improving the electrical transmission performance and stability of the collector ring.

[0049] In the case where mechanical wear is dominant, the friction coefficient can be reduced and the working efficiency of the collector ring can be improved by optimizing the lubrication system or using special surface treatment technology. In the case where wear induced by pure electrical effect is dominant, choose a friction pair of electrical contact materials with good electrical contact performance, choose a suitable processing technology to improve the electrical contact performance of the surface of the electrical contact material, or design a friction pair structure with good electrical contact effect.

[0050] 3. Reduce costs and resource waste

[0051] Determining the dominant wear mechanism can help formulate a more reasonable maintenance strategy. According to different wear mechanisms, the focus and cycle of maintenance can be determined to avoid unnecessary maintenance and replacement, thus reducing maintenance costs.

[0052] For example, if arc wear is dominant, the insulation performance of the collector ring and the location where the arc is generated can be checked regularly, and repaired or replaced in time; if the mechanical wear is more serious, the inspection and lubrication of the rolling contact pair can be strengthened to extend the service life of the collector ring.

[0053] Understanding the dominant wear mechanism helps to make rational use of resources. In the production and use of collector rings, the use of materials and processing technology can be optimized according to the dominant wear mechanism to reduce resource waste.

[0054] For example, if thermal wear is dominant, we can focus on improving the material's heat resistance during material selection and processing, reduce the use of other materials with excessively high performance requirements, and thus reduce costs.

[0055] In summary, determining the dominant mechanisms of the three types of composite wear in rolling current-carrying friction is of great significance for optimizing the design of collector rings, improving performance and reliability, and reducing costs and resource waste.

[0056] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A current-carrying friction coupling damage decoupling detection device based on in-situ cooling, characterized in that: include: A rolling current-carrying friction and wear performance test device body, the rolling current-carrying friction and wear performance test device body comprising a driving wheel, a driven wheel and an electrical contact, the electrical contact rollingly connected between the driving wheel and the driven wheel, the rotation of the driving wheel can drive the electrical contact and the driven wheel to rotate, and the driving wheel, the electrical contact and the driven wheel can form a rolling friction current-carrying circuit in combination with a power source; A cooling device, the cooling device is used to in-situ cool the positions where the electrical contact piece contacts the driving rotor and the driven rotor respectively; and A temperature detection device is used to measure the temperature of the position where the electrical contact piece contacts the driving rotor and the driven rotor.

2. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 1 is characterized in that: It also includes a temperature controller, which is signal-connected to the temperature detection device to receive the temperature signal measured by the temperature detection device and can control the cooling device to cool the position where the electrical contact contacts the driving wheel and the driven wheel to a designed temperature.

3. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 2 is characterized in that: The cooling device includes a compressed air source, a first nozzle, a first nozzle, a second nozzle and a second nozzle. The compressed air source is fixedly connected to the main body of the rolling current-carrying friction and wear performance testing device. One end of the first nozzle is used to connect and communicate with the compressed air source, and the other end is used to connect and communicate with the first nozzle. The first nozzle is used to align with the contact position between the electrical contact and the driving rotor so as to blow the gas delivered by the compressed air source to the contact position between the electrical contact and the driving rotor and perform in-situ cooling. The second nozzle is used to align with the contact position between the electrical contact and the driven rotor so as to blow the gas delivered by the compressed air source to the contact position between the electrical contact and the driven rotor and perform in-situ cooling.

4. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 3 is characterized in that: It also includes a nozzle main pipe and a pressure regulating valve, one end of the nozzle main pipe is used to connect and communicate with the first nozzle and the second nozzle, and the other end is used to connect and communicate with the pressure regulating valve, and the end of the pressure regulating valve away from the nozzle main pipe is used to connect and communicate with the compressed air source.

5. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 4 is characterized in that: It also includes a first bracket and a second bracket, the bottom of the first bracket is used to be fixedly connected to the body of the rolling current-carrying friction and wear performance testing device, the top of the first bracket is used to be detachably fixedly connected to the first nozzle, the bottom of the second bracket is used to be fixedly connected to the body of the rolling current-carrying friction and wear performance testing device, and the top of the second bracket is used to be detachably fixedly connected to the second nozzle.

6. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 5 is characterized in that: The first nozzle and the second nozzle are both serpentine cooling tubes.

7. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 3 is characterized in that: The temperature detection device comprises a thermal imaging camera, which is arranged above the electrical contact and aligned with the position where the electrical contact contacts the driving rotor and the driven rotor to monitor the temperature change of the area in real time.

8. The current-carrying friction coupling damage decoupling detection device based on in-situ cooling according to claim 1 is characterized in that: The temperature detection device also includes a thermocouple, which is fixedly connected to the body of the rolling current-carrying friction and wear performance testing device and is arranged at a position where the electrical contact piece contacts the driving rotor and the driven rotor for temperature measurement.

9. A detection method for the current-carrying friction coupling damage decoupling detection device based on in-situ cooling as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Turn on the power supply, operate the rolling current-carrying friction and wear performance test device body under any current parameter, record the evolution of temperature, friction torque and wear amount over time during the rolling current-carrying friction process of any electrical contact, and form a first friction torque evolution curve and a wear amount evolution curve; S2: Turn on the power supply, start the cooling device, run the rolling friction and wear performance test device body, set the load and speed conditions consistent with S1, adjust the cooling device, make the temperature of the contact position between the electrical contact and the driving wheel and the driven wheel reach normal temperature, record the evolution of the friction torque and wear amount of the electrical contact with the same specifications as S1 during the rolling current-carrying friction process over time; form the second friction torque evolution curve and wear amount evolution curve; S3: Under normal temperature conditions, turn off the power supply, turn off the cooling device, run the rolling friction and wear performance test device body, set the load and speed conditions consistent with S1, and record the evolution of the friction torque and wear amount of the electrical contact parts of the same specifications as in S1 during the rolling current-carrying friction process over time; form the third friction torque evolution curve and wear amount evolution curve; S4: Compare and analyze the second friction torque evolution curve and the wear amount evolution curve and the first friction torque evolution curve and the wear amount evolution curve, and make a difference between the two, and the difference forms the fourth friction torque evolution curve and the wear amount evolution curve, the fourth friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure thermal effect on the current-carrying friction and wear performance, and the difference between the second friction torque evolution curve and the wear amount evolution curve and the third friction torque evolution curve and the wear amount evolution curve forms the fifth friction torque evolution curve and the wear amount evolution curve, the fifth friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure current on the current-carrying friction and wear performance, and the third friction torque evolution curve and the wear amount evolution curve are the effect of the current-carrying friction damage induced by the pure mechanical effect on the current-carrying friction and wear performance; The third friction torque evolution curve and the wear amount evolution curve, the fourth friction torque evolution curve and the wear amount evolution curve, and the fifth friction torque evolution curve and the wear amount evolution curve are compared and analyzed to determine the dominant mechanism of rolling current friction coupling damage.

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