CN112414877B - Current-carrying frictional wear test system capable of controlling temperature and humidity and control method thereof - Google Patents
Current-carrying frictional wear test system capable of controlling temperature and humidity and control method thereof Download PDFInfo
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- CN112414877B CN112414877B CN202011129952.5A CN202011129952A CN112414877B CN 112414877 B CN112414877 B CN 112414877B CN 202011129952 A CN202011129952 A CN 202011129952A CN 112414877 B CN112414877 B CN 112414877B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
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Abstract
The invention relates to the field of friction and wear test devices, in particular to a temperature-controllable humidity-controllable current-carrying friction and wear test system and a control method thereof. The utility model provides a current-carrying frictional wear test system of controllable temperature accuse wet, includes environmental test cavity, temperature control unit, humidity control unit, current-carrying frictional wear test subassembly, data acquisition and control system. The invention provides a temperature-and humidity-controllable current-carrying frictional wear test system and a control method thereof, which aim to solve the problem that the frictional wear test machine has a simple frictional wear function and cannot meet the current-carrying wear problem in a specific environment. The current-carrying friction and abrasion process of the material under the conditions of external environment humidity or (and) temperature change is accurately and effectively simulated, and the method is more in line with engineering practice.
Description
Technical Field
The invention relates to the field of friction and wear test devices, in particular to a temperature-controllable humidity-controllable current-carrying friction and wear test system and a control method thereof.
Background
In recent years, the electrified railway in China realizes rapid development, and the total mileage of high-speed rail and urban rail transit is the first in the world. The pantograph/contact wire is used as a key current-receiving component of the electric locomotive, and the stability of the current-receiving component directly determines whether the train can run safely, quickly and reliably. Because the electric energy of the train is obtained through the sliding contact mode of the pantograph and the contact net, mechanical abrasion and electric abrasion are generated when the pantograph slide plate works in a strong current environment for a long time. Once the abrasion damage of the pantograph slide plate occurs, the current taking of a train is affected, the relationship of the pantograph net is further deteriorated in the running process, the fault of the pantograph net is caused, the running is interrupted, the stability of a traction power supply system is seriously affected, and even huge economic loss and bad social influence are brought. Particularly, under severe weather conditions such as severe cold, damp, rainy and snowy weather, an ice layer is often covered on the contact net wire, arc discharge is easily generated between the contact net wire and the contact wire when the pantograph slides, and the arc discharge can cause erosion of materials, so that abrasion of the pantograph is seriously aggravated. The loss of the train caused by the abrasion replacement of the pantograph slide plate is huge every year, so the research on the current-carrying friction behavior of the pantograph and the evolution rule of abrasion failure thereof under different temperature and humidity environments is a key for improving the abrasion resistance of the slide plate material.
The existing friction and wear testing machine is improved only with the current-carrying friction and wear functions, and the current-carrying wear states under different environments (temperature and humidity) cannot be detected, namely, the influence of the temperature and humidity environment on the current-carrying wear of the material in the actual working condition cannot be simulated, and further, the damage mechanism and the failure rule of the material cannot be analyzed and judged, so that the method and means for improving the wear failure and prolonging the service life cannot be mastered and provided.
The invention provides a temperature-controllable humidity-controllable current-carrying frictional wear system and a control method thereof, which simulate the current-carrying frictional wear process of materials under severe cold, humidity, frost, rain, snow and other conditions, obtain the influence of different environmental factors on the current-carrying wear of the materials, and provide a powerful basis for improving the wear resistance of the materials.
Disclosure of Invention
The invention provides a temperature-and humidity-controllable current-carrying frictional wear test system and a control method thereof, which aim to solve the problem that the frictional wear test machine has a simple frictional wear function and cannot meet the current-carrying wear problem in a specific environment. The current-carrying friction and abrasion process of the material under the conditions of external environment humidity or (and) temperature change is accurately and effectively simulated, and the method is more in line with engineering practice.
The invention solves the technical problems by the following technical proposal:
the current-carrying frictional wear test system capable of controlling temperature and humidity comprises an environment test cavity, a temperature control unit, a humidity control unit, a current-carrying frictional wear test assembly and a data acquisition and control system;
the environment test cavity comprises a closed cavity body which is provided with a top plate, a bottom plate and a cavity wall, wherein the top plate is provided with a humidity sensor and a temperature sensor which are used for detecting humidity in the environment test cavity body, a plurality of through holes for installing components and lead holes of leads are formed in the top plate, the humidity sensor and the temperature sensor are externally connected with a data acquisition and control system, the bottom plate is provided with a through hole five, and heat preservation cotton is arranged around the cavity wall and a visible window is reserved;
the temperature control unit is provided with a cold/hot medium generator, the cold/hot medium generator is in sealing connection with the red copper coil pipe through a pipeline, the red copper coil pipe is arranged in the environment test cavity through a first through hole and a second through hole on the top plate, and the other end of the coil pipe passes through the second through hole on the top plate to be out of the environment test cavity and is connected with the cold/hot medium generator to form a loop;
the humidity control unit is provided with a humidity generator, the outlet of the humidity generator is provided with a humidity conducting pipe, and the humidity conducting pipe is inserted into the cavity of the environment test cavity through a through hole IV of the top plate;
the current-carrying friction wear testing assembly is provided with a loading end and a power supply unit, wherein the loading end consists of a two-dimensional mechanical sensor, a pin sample and an insulating clamp connected with the pin sample, the pin sample is inserted into a cavity of the environment testing cavity through a through hole III on the top plate and is in loading contact with a disk sample, and the disk sample is in insulating connection with the rotating shaft through an insulating pad. The rotating shaft is inserted into the cavity of the environment test cavity through a through hole five of the bottom plate, and the rotating shaft is connected with the data acquisition and control system through the driving servo motor. The pin sample and the disk sample are connected with a power supply unit respectively.
Further, the two-dimensional mechanical sensor is connected with the data acquisition and control system and is used for controlling the contact force between the pin sample and the disk sample and recording the friction force in real time, and the side wall of the insulating clamp is provided with a lead hole.
Further, the red copper coil pipe surrounds the pin sample and the disk sample of the current-carrying frictional wear testing component in a spiral manner;
further, the power supply unit is provided with a mercury slip ring, the bottom of the mercury slip ring is arranged on the disk sample, and the upper end of the mercury slip ring is communicated with the negative electrode of the power supply unit; the positive electrode of the power supply unit is connected with the pin sample through a lead wire, an open-loop Hall current sensor and a variable resistor and penetrates through a lead hole on the side wall of the insulating clamp; and a pulsating direct current voltage sensor is externally connected between the pin sample and the lead connecting end of the mercury slip ring and is used for monitoring the voltage between friction pairs consisting of the pin sample and the disk sample in real time.
Furthermore, the red copper coil pipe is of a hollow structure, and a part of the red copper coil pipe exposed outside the air side part is externally covered with a heat preservation sleeve, and cold/heat medium can circulate inside the red copper coil pipe. The refrigerating medium is high-purity alcohol, and the controllable temperature range is-100 ℃ to +60 ℃.
Further, the humidity conduction pipe is a hollow pipe, a heat preservation sleeve is wrapped outside the pipe, and a terminal air outlet of the humidity conduction pipe points to a friction pair contact surface formed by a pin sample and a disk sample.
Further, the humidity control unit can control the humidity to be 5% -99%.
Furthermore, the cavity wall of the environment test cavity is made of high-boron silicon.
Further, a visual window is arranged on the environment test cavity.
A control method of a temperature-controllable humidity-controllable current-carrying frictional wear test system is characterized by comprising the following steps of: the method comprises the following steps:
(1) Mounting the pin sample and the disk sample on the corresponding jigs in advance;
(2) Setting a target temperature in the environment test cavity for the temperature control unit, and opening a medium valve to enable a medium to circularly flow through the red copper coil pipe to heat or cool the environment test cavity; or giving a humidity instruction to the humidity control unit, and conveying the humidity to the vicinity of a friction pair contact surface formed by the pin sample and the disk sample through the humidity conducting pipe;
(3) The temperature sensor or the humidity sensor transmits the real-time temperature and humidity value to the data acquisition and control system;
(4) After reaching the preset temperature or humidity, starting the variable direct current power supply unit, giving preset voltage and current to electrify the pin sample and the disk sample, and transmitting a real-time voltage value and a real-time current value to the data acquisition and control system by the pulsating direct current voltage sensor and the open-loop Hall current sensor; the friction and wear testing machine is started, a loading end applies a preset load, a pin sample is enabled to be in contact with a disk sample and is loaded to a set value, a rotating shaft runs, and a two-dimensional mechanical sensor transmits a real-time load to a data acquisition and control system.
According to the temperature-controllable humidity-controllable current-carrying frictional wear test system provided by the invention, the temperature-humidity environment in the current-carrying frictional wear test can be accurately controlled through the temperature control unit 2, the humidity control unit 3 and the current-carrying frictional wear test component 4, the current-carrying frictional wear process of materials under the conditions of external environment humidity or (and) temperature change can be accurately and effectively simulated, and the influence of different environmental factors on the current-carrying wear of the materials can be obtained.
The environment test cavity comprises a top plate, a bottom plate and a cavity wall, wherein the top plate is connected with the bottom plate through bolts in a fastening mode to ensure that the cavity is sealed, the cavity wall is made of high-boron silicon, and heat preservation cotton is arranged on the periphery of the cavity wall, so that the test cavity is heat-preserved.
And the temperature control unit is characterized in that cold/heat medium generated by the cold/heat medium generator enters the red copper guide pipe through a pipeline, flows out of the other end of the red copper guide pipe, and flows into the cold/heat medium generator through the pipeline to form a loop. The red copper guide tube is spirally wound around the pin sample and the disk sample of the current-carrying friction and wear assembly, and the temperature in the test cavity can be accurately controlled and monitored by the circulation flow of a cold/hot medium in the red copper guide tube and the cooperation of the temperature sensor.
Humidity control unit, wherein humidity generator can produce the moisture of different humidity, and humidity lets in the humidity conduction pipe through the pipeline, and the humidity conduction pipe is inserted in the cavity of environmental test cavity through the through-hole four of roof, and its terminal gas outlet is directional to the vice contact surface of friction of constituteing by round pin sample and dish sample, can realize the accurate control and the monitoring of humidity in the test cavity through the continuous cooperation humidity transducer of letting in of humidity in the humidity conduction pipe.
The current-carrying friction and wear testing assembly comprises a two-dimensional mechanical sensor, an insulating clamp, a pin sample, a disk sample, a rotating shaft, an insulating pad, a mercury slip ring, an external pulsating direct current voltage sensor, an open-loop Hall current sensor and a variable resistor. The positive electrode of the power supply unit is connected with the pin sample through a lead wire, an open-loop Hall current sensor and a variable resistor and penetrates through a lead hole on the side wall of the insulating clamp; the negative electrode of the power supply unit is communicated with the mercury slip ring, the mercury slip ring is connected with the disk sample, the pin sample is contacted with the disk sample during testing, and the power-on circuit is communicated. The two-dimensional mechanical sensor is connected with the data acquisition system, so that the control of the contact force between the pin sample and the disk sample and the real-time recording of the friction force can be realized; the external pulsating direct current voltage sensor can realize real-time monitoring of the voltage between the pin sample and the disk sample.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a three-dimensional isometric view of the present invention.
Fig. 3 is a three-dimensional isometric view of the red copper coil of the present invention.
1-environment test chamber, 11-roof, 12-floor, 13-chamber wall, 111-through hole one, 112-through hole two, 113-through hole three, 114-through hole four, 121-through hole five, 2-temperature control unit, 21-cold/heat medium generator, 22-red copper coil, 23-temperature sensor, 3-humidity control unit, 31-humidity generator, 32-humidity sensor, 311-humidity conduction pipe, 4-current-carrying frictional wear test assembly, 41-loading end, 411-two-dimensional mechanical sensor, 412-insulation clamp, 413-pin sample, 414-disk sample, 415-rotation shaft, 416-insulation pad, 42-power supply unit, 421-mercury slip ring, 422-pulsating direct current voltage sensor, 423-open loop hall current sensor, 424-variable resistor, 5-data acquisition and control system.
Detailed Description
The invention is described in further detail below with reference to examples and figures, but is not limited in any way to any modification or substitution based on the teachings of the invention.
As shown in fig. one, a temperature-controllable humidity-controllable current-carrying frictional wear test system comprises an environmental test cavity 1, a temperature control unit 2, a humidity control unit 3, a current-carrying frictional wear test component 4 and a data acquisition and control system 5;
the environment test cavity 1 comprises a closed cavity body with a top plate 11, a bottom plate 12 and a cavity wall 13, wherein the top plate 11 is provided with a humidity sensor 32 and a temperature sensor 23 for detecting humidity in the environment test cavity 1, a plurality of through holes for installing components and lead holes for leads are formed in the humidity sensor 32 and the temperature sensor 23, the humidity sensor 32 and the temperature sensor 23 are externally connected with a data acquisition and control system 5, the bottom plate 12 is provided with a through hole five 121, and heat preservation cotton is arranged around the cavity wall 13 and a visible window is reserved;
the temperature control unit 2 is provided with a cold/hot medium generator 21, the cold/hot medium generator 21 is in sealing connection with a red copper coil 22 through a pipeline, the red copper coil 22 is arranged in the environment test cavity 1 through a first through hole 111 and a second through hole 112 on the top plate 11, and the other end of the red copper coil passes through the second through hole 112 on the top plate 11 to penetrate out of the environment test cavity 1 and is connected with the cold/hot medium generator (21) to form a loop;
the humidity control unit 3 is provided with a humidity generator 31, the outlet of the humidity generator 31 is provided with a humidity conducting pipe 311, and the humidity conducting pipe 311 is inserted into the cavity of the environmental test cavity 1 through a through hole IV 114 of the top plate 11;
the current-carrying frictional wear testing assembly 4 is provided with a loading end 41 and a power supply unit 42, wherein the loading end 41 consists of a two-dimensional mechanical sensor 411, a pin sample 413 and an insulating clamp 412 connected with the pin sample 413, the pin sample 413 is inserted into a cavity of the environment testing cavity 1 through a through hole III 113 on the top plate 11 and is in loading contact with a disk sample 414, and the disk sample 414 is in insulating connection with a rotating shaft 415 through an insulating pad 416. The rotating shaft 415 is inserted into the cavity of the environmental test cavity 1 through a through hole five 121 of the bottom plate 12, and the rotating shaft 415 is connected with the data acquisition and control system 5 through a driving servo motor. The pin sample 413 and the disk sample 414 are connected to the power supply unit 42, respectively.
In this embodiment, the two-dimensional mechanical sensor 411 is connected to the data acquisition and control system 5, and is used for controlling the contact force between the pin sample 413 and the disk sample 414 and recording the friction force in real time, and the side wall of the insulating fixture 412 is provided with a lead hole.
In this embodiment, the red copper coil 22 is spirally wound around the pin sample 413 and the disk sample 414 of the current-carrying frictional wear test assembly 4;
in this embodiment, the power supply unit 42 is provided with a mercury slip ring 421, the bottom of the mercury slip ring 421 is disposed on the disk sample 414, and the upper end of the mercury slip ring 421 is communicated with the negative electrode of the power supply unit 42; the positive electrode of the power supply unit 42 is connected with the pin sample 413 through a lead wire, an open-loop Hall current sensor 423, a variable resistor 424 and a lead hole on the side wall of the insulating fixture 412; and a pulsating direct current voltage sensor 422 is externally connected between the lead connection ends of the pin sample 413 and the mercury slip ring 421 and is used for monitoring the voltage between friction pairs consisting of the pin sample 413 and the disk sample 414 in real time.
In this embodiment, the red copper coil 22 has a hollow structure, and the part of the tube exposed to the air is covered with a heat insulation jacket, and the inside of the heat insulation jacket can be circulated with cold/heat medium. The refrigerating medium is high-purity alcohol, and the controllable temperature range is-100 ℃ to +60 ℃.
In this embodiment, the humidity conduit 311 is a hollow tube, and a heat insulation sleeve is wrapped outside the tube, and a terminal air outlet of the humidity conduit points to a friction pair contact surface composed of a pin sample 413 and a disk sample 414.
In this embodiment, the controllable humidity range of the humidity control unit 3 is 5% -99%.
In this embodiment, the cavity wall 13 of the environmental test cavity 1 is made of high boron silicon.
In this embodiment, a visual window is disposed on the environmental test chamber 1.
A control method of a temperature-controllable humidity-controllable current-carrying frictional wear test system is characterized by comprising the following steps of: the method comprises the following steps:
(1) The pin specimen 413 and the disk specimen 414 are previously mounted on the respective jigs;
(2) Setting a target temperature in the environment test cavity 1 for the temperature control unit 2, and opening a medium valve to enable a medium to circularly flow through the red copper coil 22 to heat or cool the environment test cavity 1; or giving a humidity instruction to the humidity control unit 3, and conveying the humidity to the vicinity of a friction pair contact surface formed by the pin sample 413 and the disk sample 414 through the humidity conduit 311;
(3) The temperature sensor 23 or the humidity sensor 32 transmits the real-time temperature and humidity value to the data acquisition and control system;
(4) After reaching the preset temperature or humidity, the variable direct current power supply unit 42 is started, and preset voltage and current are given to electrify the pin sample 413 and the disk sample 414, and the pulsating direct current voltage sensor 422 and the open-loop Hall current sensor 423 transmit real-time voltage values and current values to the data acquisition and control system; the frictional wear testing machine is started, the loading end 41 applies a preset load, the pin sample 413 is contacted with the disk sample 414 and is loaded to a set value, the rotating shaft 415 is operated, and the two-dimensional mechanical sensor 411 transmits the real-time load to the data acquisition and control system.
As shown in fig. 2 and 3, the red copper coil 22 is hollow and spiral, and surrounds the current-carrying friction and wear test component pin sample 413 and the disk sample 414 when being installed; prior to the start of the test, disk sample 414 was screwed onto insulating pad 416, and pin sample 413 was mounted on insulating jig 412;
the loading end 41 is controlled by the control unit 5 to move downwards along the vertical direction, so that the pin sample 413 passes through the through hole III 113 to just contact with the disk sample, the data of the two-dimensional mechanical sensor 411 is cleared, and test parameters are set;
starting the cold and hot medium generator 21 to enable the cold/hot medium to flow into the red copper coil 22, and waiting for the output end of the temperature sensor 23 to display that the temperature reaches the test requirement and is stable; starting the humidity generator, enabling the humidity to flow to the vicinity of the contact area between the pin sample 413 and the disk sample 414 through the humidity conducting pipe 311, and waiting for the output end of the humidity sensor 32 to display that the humidity reaches the test requirement and is stable; the power supply unit 42 is started to enable the voltage and the current between friction pairs formed by the pin sample 413 and the disk sample 414 to meet the test requirements;
running a test program, wherein the contact load between the pin sample 413 and the disk sample 414 is loaded to the contact load set in the test and then is kept for a certain time, and then the rotating shaft 415 rotates to drive the disk sample 414 to run at a preset rotating speed, so that the test is started;
after the test is performed until a preset sliding cycle period, the rotation of the rotating shaft is stopped, then the loading end 41 acts to separate the pin sample 413 from the disk sample 414 to a certain distance, the power supply unit 42, the cold and hot medium generator 21 and the humidity generator 31 are turned off, and the test is finished;
during the test, the control unit 5 automatically collects the load data transmitted by the two-dimensional mechanical sensor 411, and feeds back and controls the action of the loading end 41 in real time so as to keep the constant contact load of the pin sample 413 and the disk sample 414;
after the test is finished, the control program of the control unit 5 is closed after the data is stored, and the test sample is taken out and stored after the temperature in the environment test cavity 1 is restored to normal temperature for subsequent analysis.
Claims (7)
1. The utility model provides a current-carrying frictional wear test system of controllable temperature accuse wet which characterized in that: the environment test device comprises an environment test cavity (1), a temperature control unit (2), a humidity control unit (3), a current-carrying friction and wear test assembly (4) and a data acquisition and control system (5);
the environment test cavity (1) comprises a top plate (11), a bottom plate (12) and a closed cavity of a cavity wall (13), wherein the top plate (11) is provided with a humidity sensor (32) and a temperature sensor (23) for detecting humidity in the environment test cavity (1), a plurality of lead holes for installing through holes and leads of components are formed in the top plate, the humidity sensor (32) and the temperature sensor (23) are externally connected with a data acquisition and control system (5), the bottom plate (12) is provided with a through hole five (121), and heat preservation cotton and a visible window are reserved around the cavity wall (13);
the temperature control unit (2) is provided with a cold/hot medium generator (21), the cold/hot medium generator (21) is in sealing connection with a red copper coil pipe (22) through a pipeline, the red copper coil pipe (22) is arranged in the environment test cavity (1) through a first through hole (111) and a second through hole (112) on the top plate (11), and the other end of the coil pipe passes through the second through hole (112) on the top plate (11) to the outside of the environment test cavity (1) and is connected with the cold/hot medium generator (21) to form a loop;
the humidity control unit (3) is provided with a humidity generator (31), the outlet of the humidity generator (31) is provided with a humidity conducting pipe (311), and the humidity conducting pipe (311) is inserted into the cavity of the environment test cavity (1) through a through hole IV (114) of the top plate (11);
the current-carrying friction wear testing assembly (4) is provided with a loading end (41) and a power supply unit (42), the loading end (41) is composed of a two-dimensional mechanical sensor (411), a pin sample (413) and an insulating clamp (412) connected with the pin sample (413), wherein the pin sample (413) is inserted into a cavity of the environment testing cavity (1) through a through hole III (113) on a top plate (11) and is in loading contact with a disk sample (414), the disk sample (414) is in insulating connection with a rotating shaft (415) through an insulating pad (416), the rotating shaft (415) is inserted into the cavity of the environment testing cavity (1) through a through hole V (121) of a bottom plate (12), the rotating shaft (415) is connected with a data acquisition and control system (5) through a driving servo motor, and the pin sample (413) and the disk sample (414) are respectively connected with the power supply unit (42); the two-dimensional mechanical sensor (411) is connected with the data acquisition and control system (5) and is used for controlling contact force between the pin sample (413) and the disk sample (414) and recording friction force in real time, and a lead hole is formed in the side wall of the insulating clamp (412); the red copper coil pipe (22) spirally surrounds a pin sample (413) and a disk sample (414) of the current-carrying frictional wear testing component (4); the power supply unit (42) is provided with a mercury slip ring (421), the bottom of the mercury slip ring (421) is arranged on the disk sample (414), and the upper end of the mercury slip ring (421) is communicated with the negative electrode of the power supply unit (42); the positive electrode of the power supply unit (42) is connected with the pin sample (413) through a lead wire, an open-loop Hall current sensor (423) and a variable resistor (424) and through a lead hole on the side wall of the insulating clamp (412); and a pulsating direct current voltage sensor (422) is externally connected between the pin sample (413) and the lead connecting end of the mercury slip ring (421) and is used for monitoring the voltage between a friction pair consisting of the pin sample (413) and the disk sample (414) in real time.
2. The temperature-controllable humidity-controllable current-carrying frictional wear test system according to claim 1, wherein the red copper coil (22) is of a hollow structure, a heat-insulating sleeve is wrapped outside a part of the red copper coil, which is exposed to the air, and a cold/heat medium can circulate inside the red copper coil, the refrigeration medium is high-purity alcohol, and the controllable temperature range is-100 ℃ to +60 ℃.
3. The temperature-controllable humidity-controllable current-carrying frictional wear test system according to claim 1, wherein the humidity conduit (311) is a hollow tube, and a thermal insulation sleeve is wrapped outside the tube, and a terminal air outlet of the humidity conduit points to a friction pair contact surface consisting of a pin sample (413) and a disk sample (414).
4. The temperature-controlled humidity-controllable current-carrying frictional wear test system according to claim 1, wherein the humidity control unit (3) has a controllable humidity range of 5% -99%.
5. The temperature-controlled humidity-controlled current-carrying frictional wear test system according to claim 1, wherein: the cavity wall (13) of the environment test cavity (1) is made of high-boron silicon.
6. The temperature-controlled humidity-controlled current-carrying frictional wear test system according to claim 1, wherein the environmental test cavity (1) is provided with a visual window.
7. A control method of a temperature-controlled humidity-controlled current-carrying frictional wear test system according to any one of claims 1 to 4, characterized by: the method comprises the following steps:
(1) -mounting the pin sample (413) and the disk sample (414) in advance on respective clamps;
(2) Setting a target temperature in the environment test cavity (1) for the temperature control unit (2), and opening a medium valve to enable a medium to circularly flow through the red copper coil (22) so as to heat or cool the environment test cavity (1); or giving a humidity instruction to the humidity control unit (3), and conveying the humidity to the vicinity of a friction pair contact surface formed by the pin sample (413) and the disk sample (414) through the humidity guide pipe (311);
(3) The temperature sensor (23) or the humidity sensor (32) transmits the real-time temperature and humidity value to the data acquisition and control system;
(4) After reaching the preset temperature or humidity, starting a variable direct current power supply unit (42) and giving preset voltage and current to electrify a pin sample (413) and a disk sample (414), and transmitting a real-time voltage value and a current value to a data acquisition and control system by a pulsating direct current voltage sensor (422) and an open-loop Hall current sensor (423); the friction and wear testing machine is started, a loading end (41) applies preset load, a pin sample (413) is in contact with a disk sample (414) and is loaded to a set value, a rotating shaft (415) operates, and a two-dimensional mechanical sensor (411) transmits real-time load to a data acquisition and control system.
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| CN202011129952.5A CN112414877B (en) | 2020-10-21 | 2020-10-21 | Current-carrying frictional wear test system capable of controlling temperature and humidity and control method thereof |
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| CN202011129952.5A CN112414877B (en) | 2020-10-21 | 2020-10-21 | Current-carrying frictional wear test system capable of controlling temperature and humidity and control method thereof |
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| CN112414877B true CN112414877B (en) | 2023-08-11 |
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| CN114235615A (en) * | 2022-01-14 | 2022-03-25 | 清华大学天津高端装备研究院 | Current-carrying friction wear test method |
| CN114216806A (en) * | 2022-01-17 | 2022-03-22 | 清华大学天津高端装备研究院 | Current-carrying friction wear test device |
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