CN110095238B - Sealing detection equipment for cooling system of motor test bench - Google Patents
Sealing detection equipment for cooling system of motor test bench Download PDFInfo
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- CN110095238B CN110095238B CN201910467514.0A CN201910467514A CN110095238B CN 110095238 B CN110095238 B CN 110095238B CN 201910467514 A CN201910467514 A CN 201910467514A CN 110095238 B CN110095238 B CN 110095238B
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- 238000012360 testing method Methods 0.000 title claims abstract description 121
- 238000001816 cooling Methods 0.000 title claims abstract description 93
- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 238000007789 sealing Methods 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract description 15
- 239000007789 gas Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241001343354 Halenia corniculata Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Examining Or Testing Airtightness (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to the technical field of tightness detection of a cooling system of a motor test board, in particular to tightness detection equipment of the cooling system of the motor test board; the method comprises the following steps: starting an air source, continuously supplying air into the cooling system of the motor test board through the water inlet end of the cooling system of the motor test board, and monitoring the pressure value of the water outlet end of the cooling system of the motor test board in real time; when the pressure value reaches a preset pressure detection peak value, closing the air source, and monitoring the real-time change of the pressure value according to a preset monitoring duration; when the observation time length is over, recording the pressure value at the moment; comparing the pressure value with a preset pressure detection peak value to evaluate the tightness of the cooling system of the motor test bench; the pressure requirement of the tightness test of the cooling system of the motor test bench can be met through the sealing detection equipment of the cooling system of the motor test bench, and the tightness test of the cooling system of the motor test bench is realized.
Description
Technical Field
The invention relates to the technical field of tightness detection of a cooling system of a motor test bench, in particular to tightness detection equipment of the cooling system of the motor test bench.
Background
The motor is a key part of the electric automobile, a stable and durable working state can be protected only by cooling with water in the working process of the motor test board for testing the function of the motor, and the patent CN200710145923.6 also discloses a test bench and a test method for the driving motor of the hybrid electric automobile.
The motor test bench is large in size, the motor test bench cannot move after being fixed, the water press sold in the market is only suitable for testing a high-pressure system with the pressure being more than 10MPa, the pressure requirement of the sealing performance test of a cooling system of the motor test bench is 0.2-0.4 MPa, and therefore the existing water press cannot meet the sealing performance test of the cooling system of the motor test bench.
Therefore, in order to solve the above problems, the present invention is urgently needed to provide a sealing performance detection device for a cooling system of a motor test bench.
Disclosure of Invention
The invention aims to provide sealing detection equipment for a cooling system of a motor test bench, which solves the technical problems that a hydraulic press in the prior art is only suitable for testing a high-pressure system with the pressure of more than 10MPa, and the pressure requirement of the sealing test of the cooling system of the motor test bench is 0.2MPa-0.4MPa, so that the existing hydraulic press cannot meet the sealing test of the cooling system of the motor test bench.
The invention provides a method for testing the sealing performance of a cooling system of a motor test bench, which comprises the following steps:
starting an air source, continuously supplying air into the cooling system of the motor test board through the water inlet end of the cooling system of the motor test board, and monitoring the pressure value of the water outlet end of the cooling system of the motor test board in real time;
when the pressure value reaches a preset pressure detection peak value, closing the air source, and monitoring the real-time change of the pressure value according to a preset monitoring duration;
when the observation time length is over, recording the pressure value at the moment;
and comparing the pressure value with a preset pressure detection peak value to evaluate the tightness of the cooling system of the motor test bench.
Preferably, the method further comprises the steps of calculating a pressure difference value between the pressure value and a preset pressure detection peak value, judging the sealing performance of the cooling system of the motor test bench according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, judging that the sealing performance of the cooling system of the motor test bench is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the motor test bench meets the requirement of sealing performance.
Preferably, the monitoring time period is 15min-30 min.
Preferably, the pressure value of the gas source is 0.2MPa to 0.6 MPa.
Preferably, the gas used for the gas source is nitrogen or air.
The invention also comprises a sealing detection device for realizing the sealing test method of the cooling system of the motor test bench, which comprises
The air source is used for continuously supplying air into the cooling system of the motor test bench through the water inlet end of the cooling system of the motor test bench;
the pressure detection device is used for monitoring the pressure value of the water outlet end of the cooling system of the motor test board in real time;
the central processing unit is used for receiving the pressure value transmitted by the pressure detection device in real time, controlling the air source to be closed when the pressure value reaches a preset pressure detection peak value, and carrying out real-time change monitoring on the transmitted pressure value according to preset monitoring duration; and when the observation duration is over, recording the pressure value at the moment, and comparing the pressure value with a preset pressure detection peak value to obtain and output a tightness test result of the cooling system of the motor test bench.
Preferably, the central processing unit is further configured to calculate a pressure difference value between the pressure value and a preset pressure detection peak value, and judge the sealing performance of the cooling system of the motor test stand according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, the sealing performance of the cooling system of the motor test stand is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the motor test bench meets the requirement of sealing performance.
Preferably, the cooling system further comprises a first connecting pipe for communicating the air source with the water inlet end of the cooling system of the motor test bench, and the second connecting pipe is used for communicating the water outlet end of the cooling system of the motor test bench with the second connecting pipe; the pressure detection device is arranged on the second connecting pipe and used for monitoring the pressure value of the water outlet end; the first connecting pipe and the second connecting pipe are respectively adjusted in height through the pipeline height adjusting mechanism.
Preferably, the pipeline height adjusting mechanism comprises a vertical plate, two sides of the vertical plate are bent with side plates extending forwards, the bottom of one side plate is provided with a pipe inlet, the top of the other side plate is provided with a pipe outlet, and a plurality of pipe positioning pieces are arranged on the front plate surface of the vertical plate at intervals along the height direction; the vertical plate height adjusting device is characterized by further comprising a height adjusting frame used for adjusting the height of the vertical plate, a plurality of height adjusting holes distributed along the height are formed in the height adjusting frame, and the vertical plate is fixedly connected with the height adjusting holes through detachable connecting pieces.
Preferably, the height adjusting frame comprises a bottom plate and a vertical column perpendicular to the bottom plate, and the height adjusting holes are distributed along the longitudinal direction of the vertical column.
Preferably, the pipe positioning part comprises arc plates which are symmetrically arranged, a pipe passing channel is arranged between the two arc plates, through holes are correspondingly arranged on the two arc plates, press fixing rods penetrate through the through holes, and two ends of each press fixing rod penetrate out of the two side plates and extend out of the side plates.
Preferably, the two sides of the upright post are provided with supporting legs.
Compared with the prior art, the method for testing the sealing performance of the cooling system of the motor test bench provided by the invention has the following steps:
1. according to the method for testing the sealing performance of the cooling system of the motor test bench, the motor test bench is not required to be moved, an air source in a laboratory can be fully utilized, the sealing performance of the cooling system of the motor test bench is tested by adopting an air-pushing water method, the pressure value of the air source is 0.2-0.6 MPa, the pressure requirement of the sealing performance test of the cooling system of the motor test bench can be met, other equipment is not required to be purchased to test the sealing performance of the cooling system of the electrode test bench, the cost is greatly saved, the method for testing the sealing performance of the cooling system of the motor test bench is simple, the cost is low, and the production cost of an enterprise is greatly saved.
2. The invention uses an air source, a pressure detection device, a central processing unit, an air source starting valve and a timer, a first connecting pipe for communicating the air source with the water inlet end of a cooling system of a motor test board, and a second connecting pipe for communicating the water outlet end of the cooling system of the motor test board with a second connecting pipe; the pressure detection device is arranged on the second connecting pipe and used for monitoring the pressure value of the water outlet end; the first connecting pipe and the second connecting pipe are respectively adjusted in height through the pipeline height adjusting mechanism, the first connecting pipe and the second connecting pipe are respectively communicated with a first electric control valve and a second electric control valve, the air source starting valve, the timer and the pressure detection device are all electrically connected with the central controller, and the first electric control valve and the second electric control valve are all electrically connected with the central controller; the pressure detection device is designed as an electronic pressure gauge, the central processing unit receives the pressure value transmitted by the pressure detection device in real time, controls the starting valve of the air source to close when the pressure value reaches a preset pressure detection peak value, and carries out real-time change monitoring on the transmitted pressure value according to preset monitoring duration; when the observation time length is over, recording the pressure value at the moment, and comparing the pressure value with a preset pressure detection peak value to obtain and output a motor test board cooling system tightness test result; meanwhile, the central processing unit calculates a pressure difference value between the pressure value and a preset pressure detection peak value, and judges the sealing performance of the cooling system of the motor test bench according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, the sealing performance of the cooling system of the motor test bench is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the motor test bench meets the requirement of tightness, the air tightness is automatically measured, and the automatic control process is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of the steps of the method for testing the sealing performance of a cooling system of a motor test stand according to the present invention;
FIG. 2 is a schematic structural view of the leak detection apparatus of the present invention;
FIG. 3 is a schematic structural view (perspective view) of the pipeline height adjustment according to the present invention;
FIG. 4 is a schematic structural view (front view) of the pipeline height adjustment according to the present invention;
FIG. 5 is a schematic structural view (perspective view) of the height adjusting bracket according to the present invention;
fig. 6 is a circuit connection diagram of the leak detection apparatus of the present invention.
Description of reference numerals:
1. a vertical plate; 111. a side plate; 2. a height adjusting bracket; 3. a tube inlet; 4. a tube outlet; 5. a tube positioning member; 6. a height adjustment hole; 7. a connecting plate; 8. a motor test bench cooling system; 801. a water inlet; 802. a water outlet; 9. a first connecting pipe; 10. a second connecting pipe; 11. a gas source; 12. a pressure detection device; 21. a base plate; 22. a column; 51. an arc-shaped plate; 52. the tube passes through the channel; 53. perforating; 54. pressing and fixing the rod; 23. supporting legs; 13. a first electrically controlled valve; 14. a second electrically controlled valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the embodiment provides a method for testing the sealing performance of a cooling system of a motor test bench, which includes the following steps:
s1) starting the air source 11, continuously supplying air into the cooling system 8 of the motor test board through the water inlet end of the cooling system 8 of the motor test board, and monitoring the pressure value of the water outlet end of the cooling system of the motor test board in real time;
s2), when the pressure value reaches the preset pressure detection peak value, closing the air source 11, and monitoring the real-time change of the pressure value according to the preset monitoring time length;
s3) when the observation time length is over, recording the pressure value at the time;
s4) comparing the pressure value with a preset pressure detection peak value to evaluate the tightness of the cooling system 8 of the motor test stand.
Specifically, a pressure difference value between the pressure value and a preset pressure detection peak value is calculated, the sealing performance of the cooling system 8 of the motor test bench is judged according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, the sealing performance of the cooling system 8 of the motor test bench is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the motor test bench meets the requirement of sealing performance; the monitoring time is 15min-30 min; the pressure value of the gas source 11 is 0.2MPa-0.6 MPa; the gas used by the gas source 11 is nitrogen or air.
According to the method for testing the sealing performance of the cooling system of the motor test bench, the motor test bench is not required to be moved, an air source in a laboratory can be fully utilized, the sealing performance of the cooling system of the motor test bench is tested by adopting an air-pushing water method, the pressure value of the air source 11 is 0.2-0.6 MPa, the pressure requirement of the sealing performance test of the cooling system of the motor test bench can be met, other equipment is not required to be purchased to test the sealing performance of the cooling system of the electrode test bench, the cost is greatly saved, the method for testing the sealing performance of the cooling system of the motor test bench is simple, the cost is low, and the production cost of an enterprise is greatly saved.
As shown in fig. 2, 3, 4, 5, and 6, the present embodiment provides a tightness testing apparatus for implementing the tightness testing method of a cooling system of an electric machine testing stand according to any one of the above embodiments, including
The air source 11 is used for continuously supplying air into the motor test bench cooling system 8 through the water inlet end of the motor test bench cooling system 8;
the pressure detection device 12 is used for monitoring the pressure value of the water outlet end of the cooling system of the motor test bench in real time;
the central processing unit is used for receiving the pressure value transmitted by the pressure detection device 12 in real time, controlling the air source 11 to be closed when the pressure value reaches a preset pressure detection peak value, and carrying out real-time change monitoring on the transmitted pressure value according to preset monitoring duration; when the observation time length is over, recording the pressure value at the moment, and comparing the pressure value with a preset pressure detection peak value to obtain and output a tightness test result of the cooling system 8 of the motor test board;
the central processing unit is further used for calculating a pressure difference value between the pressure value and a preset pressure detection peak value, judging the sealing performance of the cooling system 8 of the motor test bench according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, judging that the sealing performance of the cooling system 8 of the motor test bench is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the motor test bench meets the requirement of sealing performance;
the device also comprises an air source starting valve and a timer, wherein the first connecting pipe 9 is used for communicating an air source 11 with the water inlet end of the motor test bench cooling system 8, and the second connecting pipe 10 is used for communicating the water outlet end of the motor test bench cooling system 8; the pressure detection device 12 is arranged on the second connecting pipe 10 and used for monitoring the pressure value of the water outlet end; the first connecting pipe 9 and the second connecting pipe 10 are respectively adjusted in height through a pipeline height adjusting mechanism, the first connecting pipe 9 and the second connecting pipe 10 are respectively communicated with a first electric control valve 13 and a second electric control valve 14, an air source starting valve, a timer and a pressure detection device are all electrically connected with a central controller, and the first electric control valve and the second electric control valve are all electrically connected with the central controller; the pressure detection device 12 is an electronic pressure gauge; the pipeline height adjusting mechanism comprises a vertical plate 1, two sides of the vertical plate 1 are bent with side plates 111 extending forwards, the bottom of one side plate 111 is provided with a pipe inlet 3, the top of the other side plate 111 is provided with a pipe outlet 4, and a plurality of pipe positioning pieces 5 are arranged on the front plate surface of the vertical plate 1 at intervals along the height direction; the vertical plate height adjusting device further comprises a height adjusting frame 2 used for adjusting the height of the vertical plate, a plurality of height adjusting holes 6 distributed along the height are formed in the height adjusting frame 2, and the vertical plate 1 is fixedly connected with the height adjusting holes 6 through detachable connecting pieces; the height adjusting frame 2 comprises a bottom plate 21 and a vertical column 22 vertical to the bottom plate 21, and height adjusting holes 6 are distributed along the longitudinal direction of the vertical column 22; the pipe positioning part 5 comprises arc plates 51 which are symmetrically arranged, a pipe passing channel 52 is arranged between the two arc plates 51, through holes 53 are correspondingly arranged on the two arc plates 51, a pressing rod 54 penetrates through the through holes 53, and two ends of the pressing rod 54 respectively penetrate through the two side plates 111 and extend out of the side plates 111; support legs 23 are provided on both sides of the column 22.
According to the invention, through an air source 11, a pressure detection device 12, a central processing unit, an air source starting valve and a timer, a first connecting pipe 9 is used for communicating the air source 11 with the water inlet end of a cooling system 8 of a motor test bench, and the water outlet end of the cooling system 8 of the motor test bench is communicated with a second connecting pipe 10; the pressure detection device 12 is arranged on the second connecting pipe 10 and used for monitoring the pressure value of the water outlet end; the first connecting pipe 9 and the second connecting pipe 10 are respectively adjusted in height through a pipeline height adjusting mechanism, the first connecting pipe 9 and the second connecting pipe 10 are respectively communicated with a first electric control valve 13 and a second electric control valve 14, an air source starting valve, a timer and a pressure detection device are all electrically connected with a central controller, and the first electric control valve and the second electric control valve are all electrically connected with the central controller; the pressure detection device 12 is designed as an electronic pressure gauge, the central processing unit receives the pressure value transmitted by the pressure detection device 12 in real time, controls the starting valve of the air source to close when the pressure value reaches a preset pressure detection peak value, and carries out real-time change monitoring on the transmitted pressure value according to preset monitoring duration; when the observation time length is over, recording the pressure value at the moment, and comparing the pressure value with a preset pressure detection peak value to obtain and output a tightness test result of the cooling system 8 of the motor test board; meanwhile, the central processing unit calculates a pressure difference value between the pressure value and a preset pressure detection peak value, and judges the sealing performance of the cooling system 8 of the motor test bench according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, the sealing performance of the cooling system 8 of the motor test bench is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the motor test bench meets the requirement of tightness, the air tightness is automatically measured, and the automatic control process is realized.
The air source starting valve, the first electric control valve and the second electric control valve are all low-temperature electromagnetic valves produced by Chongqing Huamao electromagnetic valve Co; the pressure detection device is an electronic pressure gauge produced by the Xian Hua instrument Limited company; the central controller is selected from a Shanghai Ming-control sensing technology company MD-S910 pressure controller, and the devices are not limited to the models and manufacturers, and can also be selected from other models produced by other manufacturers, which are not described herein again.
The pipeline height adjusting mechanism comprises a vertical plate 1, two sides of the vertical plate 1 are bent with side plates 111 extending forwards, the bottom of one side plate 111 is provided with a pipe inlet 3, the top of the other side plate 111 is provided with a pipe outlet 4, and a plurality of pipe positioning pieces 5 are arranged on the front plate surface of the vertical plate 1 at intervals along the height direction; the vertical plate height adjusting device further comprises a height adjusting frame 2 used for adjusting the height of the vertical plate, a plurality of height adjusting holes 6 distributed along the height are formed in the height adjusting frame 2, and the vertical plate 1 is fixedly connected with the height adjusting holes 6 through detachable connecting pieces; the height adjusting frame 2 comprises a bottom plate 21 and a vertical column 22 vertical to the bottom plate 21, and height adjusting holes 6 are distributed along the longitudinal direction of the vertical column 22; the pipe positioning part 5 comprises arc plates 51 which are symmetrically arranged, a pipe passing channel 52 is arranged between the two arc plates 51, through holes 53 are correspondingly arranged on the two arc plates 51, a pressing rod 54 penetrates through the through holes 53, and two ends of the pressing rod 54 respectively penetrate through the two side plates 111 and extend out of the side plates 111; the design that the supporting legs 23 are arranged on the two sides of the upright column 22 adjusts the heights of the first connecting pipe 9 and the second connecting pipe 10, and avoids the overflow of water at the water outlet end and the water inlet end of the cooling system 8 of the motor test bench.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (1)
1. The utility model provides a motor testboard cooling system's leakproofness check out test set which characterized in that: comprises that
The air source (11) is used for continuously supplying air into the cooling system (8) of the motor test bench through the water inlet end of the cooling system (8) of the motor test bench;
the pressure detection device (12) is used for monitoring the pressure value of the water outlet end of the cooling system of the motor test bench in real time;
the central processing unit is used for receiving the pressure value transmitted by the pressure detection device (12) in real time, controlling the air source (11) to be closed when the pressure value reaches a preset pressure detection peak value, and monitoring the transmitted pressure value in real time according to preset monitoring duration; when the observation time length is over, recording the pressure value at the moment, and comparing the pressure value with a preset pressure detection peak value to obtain and output a tightness test result of the cooling system (8) of the motor test bench; the central processing unit is also used for calculating a pressure difference value between the pressure value and a preset pressure detection peak value, judging the sealing property of the cooling system (8) of the motor test bench according to a preset pressure difference threshold value, and when the pressure difference value is higher than the pressure difference threshold value, judging that the sealing property of the cooling system (8) of the tested motor test bench is poor; on the contrary, when the differential pressure value is not higher than the differential pressure threshold value, the cooling system of the tested motor test bench meets the requirement of sealing performance; the device also comprises an air source starting valve and a timer, wherein the first connecting pipe (9) is used for communicating the air source (11) with the water inlet end of the cooling system (8) of the motor test bench, and the second connecting pipe (10) is used for communicating the water outlet end of the cooling system (8) of the motor test bench; the pressure detection device (12) is arranged on the second connecting pipe (10) and used for monitoring the pressure value of the water outlet end; the first connecting pipe (9) and the second connecting pipe (10) are respectively adjusted in height through a pipeline height adjusting mechanism, a first electric control valve (13) and a second electric control valve (14) are respectively communicated with the first connecting pipe (9) and the second connecting pipe (10), an air source starting valve, a timer and a pressure detection device are all electrically connected with a central controller, and the first electric control valve (13) and the second electric control valve (14) are all electrically connected with the central controller; the pipeline height adjusting mechanism comprises a vertical plate (1), two sides of the vertical plate (1) are bent to form side plates (111) extending forwards, a pipe inlet (3) is formed in the bottom of one side plate (111), a pipe outlet (4) is formed in the top of the other side plate (111), and a plurality of pipe positioning pieces (5) are arranged on the front plate surface of the vertical plate (1) at intervals in the height direction; the vertical plate height adjusting device is characterized by further comprising a height adjusting frame (2) used for adjusting the height of the vertical plate, a plurality of height adjusting holes (6) distributed along the height are formed in the height adjusting frame (2), and the vertical plate (1) is fixedly connected with the height adjusting holes (6) through detachable connecting pieces; the height adjusting frame (2) comprises a bottom plate (21) and a vertical column (22) perpendicular to the bottom plate (21), and the height adjusting holes (6) are distributed along the longitudinal direction of the vertical column (22).
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| CN115290270A (en) * | 2022-08-02 | 2022-11-04 | 中车大连机车车辆有限公司 | Leakage detection system and method for locomotive cooling system |
| CN118150067A (en) * | 2024-05-11 | 2024-06-07 | 宁德时代新能源科技股份有限公司 | Battery testing system and battery testing method |
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