CN114577651B - Current-carrying frictional wear test device and method for simulating variable-temperature environment - Google Patents
Current-carrying frictional wear test device and method for simulating variable-temperature environment Download PDFInfo
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- CN114577651B CN114577651B CN202210225579.6A CN202210225579A CN114577651B CN 114577651 B CN114577651 B CN 114577651B CN 202210225579 A CN202210225579 A CN 202210225579A CN 114577651 B CN114577651 B CN 114577651B
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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
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
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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
- G01N3/02—Details
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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
- G01N2203/0224—Thermal cycling
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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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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Abstract
The invention discloses a current-carrying frictional wear test device and a test method thereof for simulating a temperature-changing environment, and belongs to the technical field of test. A current-carrying frictional wear test device simulating a temperature changing environment, comprising: the device comprises a test box, a temperature control mechanism connected with the test box, a movement mechanism positioned at the bottom of the inner cavity of the test box and a suspension mechanism positioned at the top of the inner cavity of the test box; the temperature control mechanism comprises: the temperature detector, the heater and the cooler are respectively extended to the inner cavity of the test box; the motion mechanism is in contact fit with the suspension mechanism. According to the invention, a cold-hot alternating environment is formed in the inner cavity of the test box through the temperature control mechanism, the movement mechanism can move in the inner cavity of the test box, the suspension mechanism is fixed at the top of the inner cavity of the test box, and the temperature-hot alternating variable-temperature current-carrying friction wear test is performed through the relative movement of the movement mechanism and the suspension mechanism.
Description
Technical Field
The invention relates to the technical field of test, in particular to a current-carrying friction and wear test device and a test method for simulating a temperature-changing environment.
Background
The description of the background art to which the present invention pertains is merely for illustrating and facilitating understanding of the summary of the invention, and should not be construed as an explicit recognition or presumption by the applicant that the applicant regards the prior art as the filing date of the first filed application.
In recent years, along with the increasing living standard of people, the role of rail transit in life is also more and more important, and an arch network system is the only flow taking path for train operation. Because extreme climates such as high-speed, long-term rain, snow, wind and sand, high and low temperature suddenly changes all make the bow net electric contact surface be in extremely abominable state, the unusual wearing and tearing that these extreme factors arouse all will cause irreversible damage to contact wire, pantograph slide, has aggravated maintenance work load, running cost, even causes personnel and property loss when serious. Therefore, the method has great practical engineering significance for researching the tribological characteristics of the electric contact under the working conditions of different currents, speeds, contact pressures and the like and the change rule of the electric characteristics.
With the promotion of the construction of the Sichuan-Tibetan railway, the bow net system faces the examination of severe environments such as high cold, low pressure and the like. The pantograph slide plate frequently suffers from high and low temperature shock and the vibration impact of the contact net, and the current-carrying friction pair can bring different degrees of influence to the current-carrying friction abrasion of the friction pair under the action of different factors. Therefore, in order to ensure safe and stable operation of the train of the Tibetan circuit, a need exists for a device capable of simulating cold and hot alternating current carrying frictional wear test, which solves the problem that the current carrying frictional wear test device in the prior art is inconvenient to truly simulate a temperature changing environment.
Disclosure of Invention
The invention aims to provide a current-carrying frictional wear test device and a current-carrying frictional wear test method for simulating a temperature-changing environment, so as to solve the problem that the conventional current-carrying frictional wear test device is inconvenient to truly simulate the temperature-changing environment.
The technical scheme for solving the technical problems is as follows:
a current-carrying frictional wear test device simulating a temperature changing environment, comprising: the device comprises a test box, a temperature control mechanism connected with the test box, a movement mechanism positioned at the bottom of the inner cavity of the test box and a suspension mechanism positioned at the top of the inner cavity of the test box;
the temperature control mechanism comprises: the temperature detector, the heater and the cooler are respectively extended to the inner cavity of the test box;
the motion mechanism is in contact fit with the suspension mechanism.
According to the invention, a cold-hot alternating environment is formed in the inner cavity of the test box through the temperature control mechanism, the movement mechanism can move in the inner cavity of the test box, the suspension mechanism is fixed at the top of the inner cavity of the test box, and the temperature-hot alternating variable-temperature current-carrying friction wear test is performed through the relative movement of the movement mechanism and the suspension mechanism.
Further, the movement mechanism includes: the device comprises a moving vehicle, a lifter arranged on the top of the moving vehicle and a pantograph slide block arranged on the top surface of the lifter, wherein the pantograph slide block is in contact fit with a suspension mechanism.
The moving vehicle is used for driving the lifter and the pantograph slide block to move in a fixed mode, the lifter is used for adjusting the real-time height of the pantograph slide block, and meanwhile, the contact pressure between the pantograph slide block and the suspension mechanism can be adjusted.
Further, the lifter includes: the lifting sliding seat is positioned on the top surface of the mobile vehicle, the lifting rod group is arranged at the bottom end of the lifting sliding seat and is in sliding fit with the top surface of the lifting sliding seat, the lifting sliding table is positioned at the top end of the lifting rod group, and the lifting pump is positioned between the lifting sliding seat and the lifting sliding table, the lifting rod group is in an X shape, the middle point is hinged, and the top surface of the lifting sliding table is in contact with the pantograph sliding block.
According to the invention, the lifting pump is used as a power source to drive the lifting rod group to deform, so that the gap between the lifting sliding table and the lifting sliding seat is adjusted, and the height of the pantograph sliding block is adjusted; when the height of the lifter is no longer increased, the lifting pump can be continuously pressurized, so that the contact pressure of the pantograph slide block and the suspension mechanism is increased.
Further, the top surface of the lifting sliding table is provided with clamping pieces, and the clamping pieces are contacted with two sides of the pantograph sliding block.
According to the invention, the clamping piece is arranged to limit and protect the position of the pantograph slide block.
Further, the suspension mechanism includes: the device comprises a fixed top frame, a busbar positioned at the bottom end of the fixed top frame, and a contact line arranged at the bottom end of the busbar, wherein the fixed top frame is connected with the top wall of the inner cavity of the test box, the two ends of the busbar are connected with the side wall of the test box through fixed side frames, and the contact line is in contact fit with a pantograph slide block.
According to the invention, the bus bar is fixed through the fixed top frame and the fixed side frame, so that the position change of the bus bar and the contact line in the process of contacting with the movement mechanism is avoided.
Further, the fixed roof rack includes: the device comprises a footstock connected with a test box, an insulator positioned at the bottom end of the footstock and a bracket positioned between the insulator and a busbar.
The invention arranges an insulator between the bracket and the top seat for ensuring the electrical insulation between the charged body and the ground,
further, the inner chamber diapire of above-mentioned test chamber is equipped with mobile vehicle contact complex annular rail, and annular rail includes: and the straight line segment and the curve segment are connected.
The invention is convenient to truly simulate the constant speed state of the train by arranging the environmental track, and can fully simulate the whole running process of acceleration, deceleration, overbending and the like of the train.
Further, a centrifugal force adapter is arranged in the mobile vehicle and used for balancing centrifugal force received by the mobile vehicle in the moving process.
According to the invention, the centrifugal force adapter is arranged to counteract the centrifugal force generated by the traveling vehicle traveling on the curve, so that the influence of the centrifugal force on the friction and wear test structure is avoided.
Further, the cooler includes: the compressor and the condenser are respectively in communication connection with the controller, the condenser is connected with a condenser pipe, and the condenser pipe is positioned in the inner cavity of the test chamber.
The invention provides cool air through the compressor and the condenser and conveys the cool air to the inner cavity of the test box through the condensing pipe, thereby realizing the cooling of the inner cavity of the test box.
The test method of the current-carrying and current-carrying frictional wear test device for simulating the temperature-changing environment comprises the following steps of:
s1: setting the alternate working time of the heater and the cooler through the controller;
s2: setting related parameters of the motion mechanism and the suspension mechanism, and enabling the motion mechanism and the suspension mechanism to reach preset contact conditions;
s3: detecting the internal temperature of the test box through a thermometer, enabling the suspension mechanism to be electrified through an external power supply, and enabling the movement mechanism to start to move at the same time;
s4: steps S1 to S3 are repeated by changing the contact condition, the movement pattern and the alternate operation time of the heater and the desuperheater.
The invention has the following beneficial effects:
(1) According to the invention, a cold-hot alternating environment is formed in the inner cavity of the test box through the temperature control mechanism, the movement mechanism can move in the inner cavity of the test box, the suspension mechanism is fixed at the top of the inner cavity of the test box, and the temperature-hot alternating variable-temperature current-carrying friction wear test is performed through the relative movement of the movement mechanism and the suspension mechanism.
(2) The invention is convenient to truly simulate the constant speed state of the train by arranging the environmental track, and can fully simulate the whole running process of acceleration, deceleration, overbending and the like of the train. And set up centrifugal force adapter and be used for canceling the centrifugal force that the mobile car was driven on the bend and produce, avoid centrifugal force to produce the influence to frictional wear test structure, can also be according to the size of the centrifugal force balancing force that centrifugal force adapter produced, reverse analysis is carried out to the frictional wear condition between motion and the suspension mechanism.
(3) According to the invention, a temperature-changing current-carrying frictional wear test with alternating cold and hot is orderly carried out through specific working steps, and temperature-changing conditions, movement forms and contact adjustment conditions can be respectively adjusted, so that the full process of the train form is fully simulated.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a current-carrying frictional wear test device simulating a temperature-changing environment;
FIG. 2 is a schematic top view of the circular track and contact wire of the present invention;
FIG. 3 is a schematic view of the position of a condenser tube according to the present invention;
FIG. 4 is a schematic diagram of the movement mechanism of the present invention;
fig. 5 is a schematic side view of the suspension mechanism of the present invention.
In the figure: 10-a test box; 11-circular tracks; 111-straight line segments; 112-curve segment;
20-a temperature control mechanism; 21-a controller; 22-a thermometer; 23-a heater; 24-cooling device; 241-compressor; 242-condensing machine; 243-condensing tubes;
30-a movement mechanism; 31-a mobile vehicle; 311-centrifugal force adapter; 32-lifters; 321-lifting a sliding seat; 322-lifter set; 323-lifting sliding table; 324-lifting pump; 33-pantograph slider; 34-a clamping member;
40-a suspension mechanism; 41-fixing a top frame; 411-footstock; 412-an insulator; 413-a scaffold; 42-bus bars; 43-contact line; 44-fixed side frames.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Examples
Referring to fig. 1, a current-carrying frictional wear test device simulating a temperature change environment includes: the device comprises a test box 10, a temperature control mechanism 20 connected with the test box 10, a movement mechanism 30 positioned at the bottom of the inner cavity of the test box 10 and a suspension mechanism 40 positioned at the top of the inner cavity of the test box.
The test box 10 is a closed box body with a certain size, and a heat insulation interlayer is arranged on the inner wall surface of the box body and used for insulating heat of the inner cavity of the box body, so that the influence of the external environment temperature on the temperature of the inner cavity of the box body is avoided.
Referring to fig. 1 and 3, the temperature control mechanism 20 includes: a controller 21 positioned outside the test chamber 10, a thermometer 22, a heater 23 and a cooler 24 which are respectively in communication with the controller 21. The controller 21 is a singlechip of STM32 series, and writes in a linkage control program in advance, so that intelligent linkage with each component is realized. The thermometer 22 extends into the interior cavity of the test chamber 10 for real-time detection of the temperature of the interior cavity of the test chamber 10. The heater 23 is also located in the interior chamber of the test chamber 10 and includes a power supply and a heater wire. The controller 21 can intelligently control the start and stop of the power supply of the heater 23, so as to drive the heating wire to heat up and release heat or stop heating. The cooler 24 includes: the compressor 241 and the condenser 242 which are respectively in communication connection with the controller 21, the condenser 242 is also connected with a condensing tube 243 which extends into the inner cavity of the test box 10, the compressor 241 and the condenser 242 cooperate to provide cold air, and the cold air is conveyed to the inner cavity of the test box 10 through the condensing tube 243, so that the inner cavity of the test box 10 is cooled in real time. The intelligent temperature control mechanism 20 can provide a cold-hot alternating temperature changing environment for the inner cavity of the test box 10, so that the climate temperature change at the moment when the train exits the tunnel is fully simulated.
Referring to fig. 1 and 4, the movement mechanism 30 includes: the traveling carriage 31, the lifter 32 located at the top of the traveling carriage 31, and the pantograph slider 33 provided on the top surface of the lifter 32, the pantograph slider 33 being in contact engagement with the suspension mechanism 40. The moving vehicle 31 can move on the bottom surface of the inner cavity of the test chamber 10, so as to drive the pantograph slider 33 and the suspension mechanism 40 to perform relative movement, thereby generating friction. The lifter 32 includes: the lifting slide seat 321 positioned on the top surface of the moving vehicle 31, the lifting rod group 322 with the bottom end in sliding fit with the top surface of the lifting slide seat 321, the lifting sliding table 323 positioned on the top end of the lifting rod group 322 and the lifting pump 324 positioned between the lifting slide seat 321 and the lifting sliding table 323. The lifting bar set 322 is X-shaped and hinged at a midpoint, and the top and bottom ends thereof are slidably adjustable by relative angles between the bars, thereby allowing height adjustment. The lifting pump 324 is used as a power source to drive the lifting rod group 322 to deform, so that the clearance between the lifting sliding table 323 and the lifting sliding seat 321 is adjusted, and the height of the pantograph sliding block 33 is adjusted; when the height of lifter 32 is no longer raised, lift pump 324 may be continuously pressurized, thereby increasing the contact pressure of pantograph slider 33 with suspension mechanism 40. The top surface of the lifting sliding table 323 is provided with a clamping piece 34, and the clamping piece 34 is contacted with two sides of the pantograph sliding block 33, so that the position of the pantograph sliding block 33 is limited and protected, and the inclined inclination of the pantograph sliding block 33 in the process of being opposite to the suspension mechanism 40 is avoided. The motion of the lift pump 324 and the cart 31 may be controlled by a remote processing center, or both may be communicatively connected to the controller 21 and uniformly scheduled by the controller 21.
Referring to fig. 1 and 5, the suspension mechanism 40 includes: the fixed top frame 41, the busbar 42 positioned at the bottom end of the fixed top frame 41 and the contact line 43 arranged at the bottom end of the busbar 42 are connected with the top wall of the inner cavity of the test chamber 10, and the contact line 43 is in contact fit with the pantograph slide block 33. The two ends of the busbar 42 are connected with the side wall of the test box 10 through the fixed side frames 44, and the busbar 42 is fixed through the fixed top frame 41 and the fixed side frames 44, so that the position change of the busbar 42 and the contact line 43 in the contact process with the pantograph slide block 33 is avoided.
The fixed top frame 41 includes: a top seat 411 connected with the test chamber 10, an insulator 412 positioned at the bottom end of the top seat 411, and a bracket 413 positioned between the insulator 412 and the bus bar 42. The invention arranges an insulator 412 between the bracket 411 and the top seat 413, which is used for ensuring the electrical insulation between the charged body and the ground and increasing the creepage distance. The bottom end of the bracket 413 is provided with a busbar clamp for clamping the busbar 42, and the bottom end of the busbar 42 is also provided with a contact clamp for clamping the contact line 43, so that the position stability of the busbar 42 and the contact line 43 is ensured, and the easy position change caused by friction with the pantograph slide block 33 is avoided. The fixed side frames 44 are similar in structure to the fixed top frame 41, thereby ensuring insulation safety.
Referring to fig. 1 and 2, the bottom wall of the inner cavity of the test chamber 10 is provided with an annular rail 10 in contact engagement with a trolley 31, the annular rail 10 comprising: the straight line section 111 and the curve section 112 which are connected are convenient for truly simulating the constant speed state of the train, and can fully simulate the whole running process of acceleration and deceleration, overbending and the like of the train. The inside of mobile cart 31 is equipped with centrifugal force adapter 311, and centrifugal force adapter 311 includes sensing portion and application of force portion, and sensing portion is used for the centrifugal force size that the response mobile cart 31 received, and application of force portion is used for exerting the balanced power of the centrifugal force that receives to mobile cart 31 to balanced the centrifugal force that receives to mobile cart 31 removes the in-process, offset the centrifugal force that mobile cart 31 was driven on the bend and produced, avoid centrifugal force to produce the influence to friction and wear test structure.
The test method of the current-carrying and current-carrying frictional wear test device for simulating the temperature-changing environment comprises the following steps of:
s1: the controller 21 sets the alternate operation time of the heater 23 and the cooler 24;
s2: setting relevant parameters of the motion mechanism 30 and the suspension mechanism 40, and enabling the motion mechanism 30 and the suspension mechanism to reach preset contact conditions; mainly comprises lifting pressure and pressurizing stroke of the lifting pump 324, contact force between the pantograph slide block 33 and the contact line 43 and a contact force change curve.
S3: detecting the internal temperature of the test box 10 by the thermometer 22, and enabling the suspension mechanism 40 to be electrified by an external power supply, and enabling the movement mechanism 30 to start to move; the trolley 31 continues to move along the endless track 11, keeping the pantograph slider 33 in constant contact with the contact line 43, while the centrifugal force adaptor 311 starts to operate.
S4: steps S1 to S3 are repeated by changing the contact condition, the movement pattern, and the alternate operation time of the heater 23 and the desuperheater 24. The numerical variation of the respective components can be finally analyzed, and the degree of wear of the pantograph slider 33 and the contact line 43 is detected.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides a current-carrying frictional wear test device of simulation alternating temperature environment which characterized in that includes: the device comprises a test box (10), a temperature control mechanism (20) connected with the test box (10), a movement mechanism (30) positioned at the bottom of the inner cavity of the test box (10) and a suspension mechanism (40) positioned at the top of the inner cavity of the test box (10);
the temperature control mechanism (20) includes: the temperature detector (22), the heater (23) and the cooler (24) are respectively connected with the controller (21) in a communication mode, and the temperature detector (22), the heater (23) and the cooler (24) respectively extend to the inner cavity of the test box (10);
the motion mechanism (30) is in contact fit with the suspension mechanism (40);
the movement mechanism (30) includes: the device comprises a moving vehicle (31), a lifter (32) positioned at the top of the moving vehicle (31) and a pantograph slide block (33) arranged on the top surface of the lifter (32), wherein the pantograph slide block (33) is in contact fit with the suspension mechanism (40);
the lifter (32) includes: the lifting trolley comprises a lifting sliding seat (321) arranged on the top surface of the moving trolley (31), a lifting rod group (322) with the bottom end in sliding fit with the top surface of the lifting sliding seat (321), a lifting sliding table (323) arranged on the top end of the lifting rod group (322) and a lifting pump (324) arranged between the lifting sliding seat (321) and the lifting sliding table (323), wherein the lifting rod group (322) is of an X shape, the middle point is hinged, and the top surface of the lifting sliding table (323) is in contact with the pantograph sliding block (33);
the inner chamber diapire of test chamber (10) be equipped with travelling car (31) contact complex annular rail (11), annular rail (11) include: a straight line section (111) and a curved line section (112) which are connected;
a centrifugal force adapter (311) is arranged in the mobile vehicle (31), and the centrifugal force adapter (311) is used for balancing the centrifugal force received by the mobile vehicle (31) in the moving process.
2. The current-carrying frictional wear test device for simulating a temperature changing environment according to claim 1, wherein a clamping piece (34) is arranged on the top surface of the lifting sliding table (323), and the clamping piece (34) is in contact with two sides of the pantograph sliding block (33).
3. The apparatus for simulating a variable temperature environment of claim 1, wherein the suspension mechanism (40) comprises: the device is characterized in that the device is connected with the top wall of an inner cavity of the test box (10) to form a fixed top frame (41), a busbar (42) arranged at the bottom end of the fixed top frame (41) and a contact line (43) arranged at the bottom end of the busbar (42), two ends of the busbar (42) are connected with the side wall of the test box (10) through fixed side frames (44), and the contact line (43) is in contact fit with the pantograph sliding block (33).
4. A current-carrying frictional wear test device in a simulated temperature change environment as claimed in claim 3, wherein said stationary roof rack (41) comprises: the device comprises a top seat (411) connected with the test box (10), an insulator (412) positioned at the bottom end of the top seat (411) and a bracket (413) positioned between the insulator (412) and the busbar (42).
5. The apparatus for simulating a variable temperature environment of claim 4, wherein said cooler (24) comprises: and the compressor (241) and the condenser (242) are respectively in communication connection with the controller (21), the condenser (242) is connected with a condenser pipe (243), and the condenser pipe (243) is positioned in the inner cavity of the test box (10).
6. A method of testing a current-carrying frictional wear test device for simulating a temperature change environment as set forth in any one of claims 1 to 5, comprising the steps of:
s1: -setting, by means of the controller (21), the alternate operating times of the heater (23) and of the desuperheater (24);
s2: setting related parameters of the motion mechanism (30) and the suspension mechanism (40) and enabling the motion mechanism and the suspension mechanism to reach preset contact conditions;
s3: detecting the internal temperature of the test box (10) through the thermometer (22), enabling an external power supply to enable the suspension mechanism (40) to be electrified, and enabling the movement mechanism (30) to start to move;
s4: steps S1 to S3 are repeated by varying the contact conditions and the alternating operation time of the heater (23) and the desuperheater (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210225579.6A CN114577651B (en) | 2022-03-07 | 2022-03-07 | Current-carrying frictional wear test device and method for simulating variable-temperature environment |
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| CN202210225579.6A CN114577651B (en) | 2022-03-07 | 2022-03-07 | Current-carrying frictional wear test device and method for simulating variable-temperature environment |
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| CN114577651B true CN114577651B (en) | 2023-06-16 |
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| RU99391U1 (en) * | 2010-05-05 | 2010-11-20 | Государственное образовательное учреждение высшего профессионального образования Омский государственный университет путей сообщения | STAND FOR RESEARCH OF INTERACTION OF A SURFACE RECEIVER WITH A CONTACT SUSPENSION |
| CN203595644U (en) * | 2013-12-16 | 2014-05-14 | 西南交通大学 | Device for testing friction abrasion loss of carton brush material under current carrying condition |
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| CN108982273A (en) * | 2018-08-08 | 2018-12-11 | 湖北工程学院 | Current-carrying frictional wear experiment machine and current-carrying frictional wear experiment system |
| CN110095371B (en) * | 2019-05-28 | 2020-09-01 | 西南交通大学 | Current-carrying friction wear test device and operation method thereof |
| CN111189655B (en) * | 2020-03-06 | 2024-07-16 | 西南交通大学 | Rigid-flexible combined sliding electric contact test device and test method |
| CN212624873U (en) * | 2020-07-06 | 2021-02-26 | 华东交通大学 | Novel high-speed rail contact wire with low abrasion and high current receiving |
| CN112067485B (en) * | 2020-09-16 | 2021-11-09 | 西南交通大学 | Multifunctional current-carrying frictional wear experimental device and operation method thereof |
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| JP2007218746A (en) * | 2006-02-16 | 2007-08-30 | Bridgestone Corp | Frictional abrasion testing machine |
| EP2876424A2 (en) * | 2013-11-25 | 2015-05-27 | Société Nationale des Chemins de Fer Français - SNCF | Thermal test bench of a pantograph wearing strip and corresponding thermal testing method |
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