CN112414877A - 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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- CN112414877A CN112414877A CN202011129952.5A CN202011129952A CN112414877A CN 112414877 A CN112414877 A CN 112414877A CN 202011129952 A CN202011129952 A CN 202011129952A CN 112414877 A CN112414877 A CN 112414877A
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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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- 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 frictional wear experimental devices, in particular to a current-carrying frictional wear test system capable of controlling temperature and humidity and a control method thereof. A 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 invention provides a temperature and humidity controllable current-carrying friction wear test system and a control method thereof, aiming at solving the problem that a friction wear test machine has a simple friction wear function and cannot meet the current-carrying wear problem in a specific environment. The current-carrying friction and wear process of the material under the condition of external environment humidity or (and) temperature change is accurately and effectively simulated, and the engineering practice is better met.
Description
The technical field is as follows:
the invention relates to the field of frictional wear experimental devices, in particular to a current-carrying frictional wear test system capable of controlling temperature and humidity and a control method thereof.
Background art:
in recent years, the rapid development of the electrified railways in China is realized, and the total mileage of high-speed rail and urban rail transit is stable in the first place in the world. The stability of the pantograph/contact wire as a key current receiving component of the electric locomotive directly determines whether the train can run safely, quickly and reliably. The electric energy of the train is obtained by the sliding contact mode of the pantograph and the contact network, so that the pantograph slide plate generates mechanical abrasion and electric abrasion when working under a strong current environment for a long time. Once the pantograph slide plate is worn and damaged, the current taking of the train is influenced, the pantograph-catenary relationship can be further deteriorated in the operation process, the pantograph-catenary fault is caused, the running is interrupted, the stability of a traction power supply system is seriously influenced, and even huge economic loss and adverse social influence can be brought. Particularly, under severe weather conditions such as severe cold, humid, rainy and snowy weather, the contact line wires are often covered with frost layers, and arc discharge is easily generated between the pantograph and the contact line wires when the pantograph slides, and the arc discharge can cause erosion of materials and seriously aggravate abrasion of the pantograph. The loss of the train caused by wear replacement of the pantograph slide plate is huge every year, so that the key for improving the wear resistance of the slide plate material is to study the evolution law of the current-carrying friction behavior and the wear failure of the pantograph under different temperature and humidity environments.
The existing friction wear testing machine is only modified by a current-carrying friction wear function, and current-carrying wear states under different environments (temperature and humidity) cannot be detected, namely the influence of the temperature and humidity environment in actual working conditions on the current-carrying wear of materials cannot be simulated, so that the damage mechanism and the failure rule of the materials cannot be analyzed and judged, and therefore a method and a means for improving wear failure and prolonging the service life cannot be mastered and provided.
The invention provides a temperature-controllable and humidity-controllable current-carrying frictional wear system and a control method, which are used for simulating a current-carrying frictional wear process of a material under the conditions of severe cold, humidity, frost, rain, snow and the like, obtaining the influence of different environmental factors on current-carrying wear of the material and providing a powerful basis for improving the wear resistance of the material.
Disclosure of Invention
The invention provides a temperature and humidity controllable current-carrying friction wear test system and a control method thereof, aiming at solving the problem that a friction wear test machine has a simple friction wear function and cannot meet the current-carrying wear problem in a specific environment. The current-carrying friction and wear process of the material under the condition of external environment humidity or (and) temperature change is accurately and effectively simulated, and the engineering practice is better met.
The technical problem to be solved by the invention is realized by the following technical scheme:
a 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 top plate, a bottom plate and a closed cavity body with a cavity wall, wherein the top plate is provided with a humidity sensor and a temperature sensor for detecting the humidity in the environment test cavity, a plurality of through holes for mounting components and lead holes for leads, the humidity sensor and the temperature sensor are externally connected with a data acquisition and control system, the bottom plate is provided with through holes, and heat insulation cotton is arranged around the cavity wall and a visible window is reserved;
the temperature control unit is provided with a cold/heat medium generator, the cold/heat medium generator is hermetically connected with the red copper coil pipe through a pipeline, the red copper coil pipe is arranged in the environment test cavity through the through hole and the through hole in the top plate, and the other end of the coil pipe penetrates out of the environment test cavity through the through hole in the top plate and is connected with the cold/heat medium generator to form a loop;
the humidity control unit is provided with a humidity generator, an outlet of the humidity generator is provided with a humidity conducting pipe, and the humidity conducting pipe is inserted into a cavity of the environment test cavity through a through hole 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 comprises 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 an environment test cavity through a through hole in a top plate and is in loading contact with a disc sample, and the disc sample is in insulating connection with a rotating shaft through an insulating pad. The rotating shaft is inserted into a cavity of the environmental test cavity through a through hole of the bottom plate, and the rotating shaft is connected with a data acquisition and control system through a driving servo motor. The pin and disc samples are connected to a power supply unit, respectively.
Furthermore, the two-dimensional mechanical sensor is connected with a data acquisition and control system and used for controlling contact force between the pin sample and the disc sample and recording friction force in real time, and a lead hole is formed in the side wall of the insulating clamp.
Furthermore, the red copper coil spirally surrounds a pin test sample and a disc test sample of the current-carrying frictional wear test assembly;
further, the power supply unit is provided with a mercury slip ring, the bottom of the mercury slip ring is placed on the disc sample, and the upper end of the mercury slip ring is communicated with the negative electrode of the power supply unit; the anode of the power supply unit passes through the open-loop Hall current sensor and the variable resistor through a lead wire and penetrates through a lead wire hole on the side wall of the insulating clamp to be connected with the pin sample; 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 a friction pair consisting of the pin sample and the disc sample in real time.
Furthermore, the red copper coil pipe is of a hollow structure, a heat insulation sleeve is wrapped outside the part exposed out of the air side, and a cold/hot medium can flow in the heat insulation sleeve. The refrigeration medium is high-purity alcohol, and the controllable temperature range is-100 ℃ to +60 ℃.
Furthermore, the humidity conduction pipe is a hollow pipe, a heat insulation sleeve wraps the outside of the humidity conduction pipe, and an air outlet at the terminal of the humidity conduction pipe points to a friction pair contact surface formed by the pin sample and the disc sample.
Further, the controllable humidity range of the humidity control unit is 5% -99%.
Further, the material adopted by the cavity wall of the environmental test cavity is high borosilicate.
Furthermore, a visible window is arranged on the environment test cavity.
A control method of a current-carrying friction wear test system capable of controlling temperature and humidity is characterized by comprising the following steps: the method comprises the following steps:
(1) mounting the pin sample and the disc sample on corresponding clamps in advance;
(2) setting a target temperature in the environment test cavity for the temperature control unit, opening a medium valve to enable the medium to circularly flow through the red copper coil pipe to achieve temperature rise or temperature reduction of the environment test cavity; or giving a humidity instruction to the humidity control unit, and conveying moisture to the vicinity of a contact surface of a friction pair consisting of the pin sample and the disc sample through a humidity conduction 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 the preset temperature or humidity is reached, the variable direct current power supply unit is started, preset voltage and current are supplied to electrify the pin test sample and the disc test sample, and the pulse direct current voltage sensor and the open-loop Hall current sensor transmit a real-time voltage value and a real-time current value to the data acquisition and control system; and starting the friction wear testing machine, applying a preset load on a loading end to enable the pin test sample to be in contact with the disc test sample and loaded to a set value, rotating the rotating shaft, and transmitting the real-time load to a data acquisition and control system by the two-dimensional mechanical sensor.
The invention has the beneficial effects that:
the temperature-controllable and humidity-controllable current-carrying frictional wear test system provided by the invention can realize the accurate control of the temperature and humidity environment in the current-carrying frictional wear test through the temperature control unit 2, the humidity control unit 3 and the current-carrying frictional wear test component 4, accurately and effectively simulate the current-carrying frictional wear process of the material under the condition of external environment humidity or (and) temperature change, and obtain the influence of different environmental factors on the current-carrying wear of the material.
The environment test cavity comprises a top plate, a bottom plate and a cavity wall, wherein the top plate and the bottom plate are connected through bolts in a fastening mode to guarantee that the cavity is sealed, the cavity wall is made of high borosilicate materials, and heat preservation cotton is arranged on the periphery of the cavity wall, so that the test cavity is enabled to realize heat preservation.
And the temperature control unit is characterized in that the cold/heat medium generator generates cold/heat medium which enters the red copper guide pipe through a pipeline, flows out of the other end of the red copper guide pipe and then flows into the cold/heat medium generator through the pipeline to form a loop. The red copper guide pipe spirally surrounds a pin sample and a disc sample of the current-carrying friction wear assembly, and the accurate control and monitoring of the temperature in the test cavity can be realized by matching the circulating flow of the cold/hot medium in the red copper guide pipe with the temperature sensor.
Humidity control unit, wherein humidity generator can produce the moisture of different humidity, and the moisture lets in the humidity conduction pipe through the pipeline, and the humidity conduction pipe inserts in the cavity of environmental test cavity via the through-hole of roof, and the vice contact surface of friction that its terminal gas outlet is directional to constitute by round pin sample and dish sample, can realize the accurate control and the monitoring of humidity in the test cavity through constantly letting in cooperation humidity sensor of moisture in the humidity conduction pipe.
The current-carrying friction wear testing assembly comprises a two-dimensional mechanical sensor, an insulating clamp, a pin test sample, a disc test sample, a rotating shaft, an insulating pad, a mercury slip ring, an external pulse direct-current voltage sensor, an open-loop Hall current sensor and a variable resistor. The anode of the power supply unit passes through the open-loop Hall current sensor and the variable resistor through a lead wire and penetrates through a lead wire hole on the side wall of the insulating clamp to be connected with the pin sample; 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 in contact with the disk sample during testing, and the power-on loop 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 disc sample and the real-time recording of the friction force can be realized; the external pulse direct current voltage sensor can realize the real-time monitoring of the voltage between the pin sample and the disc sample.
Drawings
Fig. 1 is a schematic view of the general 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 a copper coil of the present invention.
Description of reference numerals:
1-environmental test cavity, 11-top plate, 12-bottom plate, 13-cavity wall, 111-through hole, 112-through hole, 113-through hole, 114-through hole, 121-through hole, 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 conducting pipe, 4-current-carrying friction and wear test component, 41-loading end, 411-two-dimensional mechanical sensor, 412-insulating clamp, 413-pin sample, 414-disk sample, 415-rotating shaft, 416-insulating pad, 42-power supply unit, 421-mercury slip ring, 422-pulsating direct current voltage sensor, 416-pulse voltage sensor, 423-open loop hall current sensor, 424-variable resistor, 5-data acquisition and control system.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the following examples and the accompanying drawings, but the present invention is not limited in any way, and any modifications or alterations based on the teaching of the present invention are within the scope of the present invention.
As shown in fig. 1, a temperature-controllable wet current-carrying frictional wear test system includes an environmental test chamber 1, a temperature control unit 2, a humidity control unit 3, a current-carrying frictional wear test assembly 4, and a data acquisition and control system 5;
the environment test cavity 1 comprises a closed cavity body of 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 the humidity in the environment test cavity 1, a plurality of through holes for installing components and lead holes for leads, 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 through holes 121, and the periphery of the cavity wall 13 is provided with heat insulation cotton and a visible window is reserved;
the temperature control unit 2 is provided with a cold/heat medium generator 21, the cold/heat medium generator 21 is hermetically connected with a red copper coil 22 through a pipeline, the red copper coil 22 is arranged in the environment test cavity 1 through a through hole 111 and a through hole 112 in the top plate 11, and the other end of the coil penetrates out of the environment test cavity 1 through the through hole 112 in the top plate 11 and is connected with the cold/heat 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 the through hole 114 of the top plate 11;
the current-carrying friction wear test assembly 4 is provided with a loading end 41 and a power supply unit 42, wherein the loading end 41 is composed of a two-dimensional mechanical sensor 411, a pin sample 413 and an insulation clamp 412 connected with the pin sample 413, the pin sample 413 is inserted into a cavity of the environmental test cavity 1 through a through hole 113 in the top plate 11 and is in loading contact with a disc sample 414, and the disc sample 414 is in insulation connection with a rotating shaft 415 through an insulation pad 416. The rotating shaft 415 is inserted into the cavity of the environmental test chamber 1 through the through hole 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 specimen 413 and the disk specimen 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 a lead hole is formed in the sidewall of the insulating fixture 412.
In this embodiment, the red copper coil 22 spirally surrounds the pin sample 413 and the disc 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 placed 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 pole 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 clamp 412; and a pulsating direct current voltage sensor 422 is externally connected between the lead connecting ends of the pin sample 413 and the mercury slip ring 421 and is used for monitoring the voltage between a friction pair consisting of the pin sample 413 and the disc sample 414 in real time.
In this embodiment, the copper coil 22 is a hollow structure, and the portion exposed to the air is externally wrapped with a thermal insulation sleeve, and the interior of the copper coil can be circulated with cooling/heating media. The refrigeration medium is high-purity alcohol, and the controllable temperature range is-100 ℃ to +60 ℃.
In this embodiment, the humidity conducting tube 311 is a hollow tube, and the heat insulating sleeve is wrapped around the hollow tube, and the air outlet at the terminal of the humidity conducting tube is directed to the contact surface of the friction pair composed of the pin sample 413 and the disc sample 414.
In this embodiment, the controllable humidity range of the humidity control unit 3 is 5% to 99%.
In this embodiment, the cavity wall 13 of the environmental test cavity 1 is made of high borosilicate.
In this embodiment, the environmental test chamber 1 is provided with a visible window.
A control method of a current-carrying friction wear test system capable of controlling temperature and humidity is characterized by comprising the following steps: the method comprises the following steps:
(1) the pin sample 413 and the disk sample 414 are mounted on the corresponding jigs in advance;
(2) setting a target temperature in the environmental test cavity 1 for the temperature control unit 2, opening a medium valve to enable the medium to circularly flow through the red copper coil 22 to realize temperature rise or temperature reduction of the environmental test cavity 1; or giving a humidity instruction to the humidity control unit 3, and delivering moisture to the vicinity of the contact surface of the friction pair composed of 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 the preset temperature or humidity is reached, the variable direct current power supply unit 42 is started, preset voltage and current are supplied to electrify the pin sample 413 and the disc sample 414, and the pulse direct current voltage sensor 422 and the open-loop hall current sensor 423 transmit a real-time voltage value and a real-time current value to a data acquisition and control system; and starting the friction wear testing machine, applying a preset load by the loading end 41 to enable the pin test sample 413 to be in contact with the disc test sample 414 and loaded to a set value, rotating the rotating shaft 415, and transmitting the real-time load to the data acquisition and control system by the two-dimensional mechanical sensor 411.
As shown in fig. 2 and 3, the red copper coil 22 is a hollow structure and is spiral, and is installed around the current-carrying frictional wear test assembly pin sample 413 and the disc sample 414; the disk sample 414 was screwed to the insulating pad 416 before the test started, and the pin sample 413 was mounted on the insulating jig 412;
the control unit 5 controls the loading end 41 to move downwards along the vertical direction, so that the pin sample 413 passes through the through hole 113 to be just contacted with the disc sample, the data of the two-dimensional mechanical sensor 411 is cleared, and test parameters are set;
starting the cold and heat medium generator 21 to make the cold/heat medium flow into the red copper coil 22, and waiting for the temperature displayed at the output end of the temperature sensor 23 to reach the test requirement and be stable; starting a humidity generator to enable moisture to flow to the position near a contact area between the pin test sample 413 and the disc test sample 414 through the humidity conduction pipe 311, and waiting for the humidity displayed at the output end of the humidity sensor 32 to reach the test requirement and be stable; starting the power supply unit 42 to enable the voltage current between the friction pair consisting of the pin sample 413 and the disc sample 414 to meet the test requirement;
running a test program, loading the contact load between the pin test sample 413 and the disc test sample 414 for a certain time after the contact load is loaded to the contact load set in the test, then rotating the rotating shaft 415 to drive the disc test sample 414 to run according to a preset rotating speed, and starting the test;
when the test is carried out to the preset sliding cycle period, the rotating shaft stops rotating, then the loading end 41 acts to separate the pin test sample 413 from the disc test sample 414 to a certain distance, the power supply unit 42, the cold and heat medium generator 21 and the humidity generator 31 are closed, and the test is finished;
in the test process, the control unit 5 automatically acquires 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 to keep constant contact load of the pin test sample 413 and the disc test 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 environmental test cavity 1 is restored to the normal temperature for the subsequent analysis.
Claims (10)
1. The utility model provides a wet current-carrying friction wear test system of controllable control by temperature change which characterized in that: the device comprises an environmental test cavity (1), a temperature control unit (2), a humidity control unit (3), a current-carrying friction wear test component (4) and a data acquisition and control system (5);
the environment test cavity (1) comprises a closed cavity body of 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) which are used for detecting the humidity in the environment test cavity (1), a plurality of through holes for installing components and lead holes for leads, 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 through holes (121), and heat insulation cotton is arranged around the cavity wall (13) and a visual window is reserved; the temperature control unit (2) is provided with a cold/heat medium generator (21), the cold/heat 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 through hole (111) and a through hole (112) in the top plate (11), and the other end of the coil penetrates out of the environment test cavity (1) through the through hole (112) in the top plate (11) and is connected with the cold/heat medium generator (21) to form a loop;
the humidity control unit (3) is provided with a humidity generator (31), an outlet of the humidity generator (31) is provided with a humidity conducting pipe (311), and the humidity conducting pipe (311) is inserted into a cavity of the environment test cavity (1) through a through hole (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), 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 test cavity (1) through a through hole (113) in a top plate (11) and is in loading contact with a disc sample (414), and the disc sample (414) is in insulating connection with a rotating shaft (415) through an insulating pad (416). The rotating shaft (415) is inserted into a cavity of the environment test cavity (1) through a through hole (121) of the bottom plate (12), and the rotating shaft (415) is connected with a data acquisition and control system (5) through a driving servo motor. The pin test piece (413) and the disk test piece (414) are connected to a power supply unit (42), respectively.
2. A temperature and humidity controlled current-carrying frictional wear test system according to claim 1, wherein the two-dimensional mechanical sensor (411) is connected to the data acquisition and control system (5) for controlling the contact force between the pin sample (413) and the disc sample (414) and recording the friction force in real time, and the insulating fixture (412) has a lead hole on the sidewall.
3. A temperature and humidity controlled current-carrying frictional wear test system as set forth in claim 1 in which the copper coil (22) is helically wound around the pin specimen (413) and the disc specimen (414) of the current-carrying frictional wear test assembly (4).
4. A temperature and humidity controlled current-carrying frictional wear test system as claimed in claim 1, wherein said power supply unit (42) is provided with a mercury slip ring (421), the bottom of said mercury slip ring (421) is placed on said disc sample (414), the upper end of said mercury slip ring (421) is connected to the negative electrode of said power supply unit (42); the positive electrode of the power supply unit (42) is connected with the pin sample (413) through a lead wire, passes through the open-loop Hall current sensor (423), the variable resistor (424) and passes 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 lead connecting ends of the pin sample (413) and the mercury slip ring (421) and is used for monitoring the voltage between a friction pair consisting of the pin sample (413) and the disc sample (414) in real time.
5. A temperature and humidity controlled current-carrying frictional wear test system as claimed in claim 1, wherein said copper coil (22) is hollow, exposed to the outside of the air side part of the pipe, is wrapped with a thermal insulation jacket, and is internally circulated with cooling/heating media. The refrigeration medium is high-purity alcohol, and the controllable temperature range is-100 ℃ to +60 ℃.
6. The temperature and humidity controlled current-carrying frictional wear test system according to claim 1, wherein the humidity conducting tube (311) is a hollow tube and is wrapped with a thermal insulation sleeve, and a terminal air outlet of the humidity conducting tube is directed to a friction pair contact surface consisting of the pin sample (413) and the disc sample (414).
7. A temperature and humidity controlled current-carrying frictional wear test system as claimed in claim 1, wherein the controllable humidity range of said humidity control unit (3) is 5% -99%.
8. The temperature and humidity controlled current-carrying frictional wear test system of claim 1, wherein: the material adopted by the cavity wall (13) of the environment test cavity (1) is high borosilicate.
9. A temperature and humidity controlled current-carrying frictional wear test system as claimed in claim 1, wherein said environmental test chamber (1) is provided with a visual window.
10. A control method of a temperature-controllable wet current-carrying frictional wear test system based on any one of claims 1 to 7, characterized in that: the method comprises the following steps:
(1) mounting the pin sample (413) and the disc sample (414) on corresponding clamps in advance;
(2) setting a target temperature in the environment test cavity (1) for the temperature control unit (2), opening a medium valve to enable a medium to circularly flow through the red copper coil (22) to realize temperature rise or temperature reduction of the environment test cavity (1); or giving a humidity instruction to the humidity control unit (3), and conveying moisture to the vicinity of a friction pair contact surface consisting of the pin sample (413) and the disc sample (414) through the humidity conduction 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 the preset temperature or humidity is reached, the variable direct current power supply unit (42) is started, preset voltage and current are supplied to electrify the pin sample (413) and the disc sample (414), and the pulse direct current voltage sensor (422) and the open-loop Hall current sensor (423) transmit a real-time voltage value and a real-time current value to the data acquisition and control system; and starting the friction wear testing machine, applying a preset load by the loading end (41), enabling the pin test sample (413) to be in contact with the disc test sample (414) and loaded to a set value, operating the rotating shaft (415), and transmitting the real-time load to the data acquisition and control system by the two-dimensional mechanical sensor (411).
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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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| Application Number | Priority Date | Filing Date | Title |
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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 CN112414877B (en) | 2023-08-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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