CN112964750A - Rail transit converter water cooling system test device and test method - Google Patents
Rail transit converter water cooling system test device and test method Download PDFInfo
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- CN112964750A CN112964750A CN202110381044.3A CN202110381044A CN112964750A CN 112964750 A CN112964750 A CN 112964750A CN 202110381044 A CN202110381044 A CN 202110381044A CN 112964750 A CN112964750 A CN 112964750A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 509
- 238000001816 cooling Methods 0.000 title claims abstract description 251
- 238000012360 testing method Methods 0.000 title claims abstract description 179
- 238000010998 test method Methods 0.000 title claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 53
- 238000005192 partition Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 230000017525 heat dissipation Effects 0.000 claims description 17
- 230000003068 static effect Effects 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 abstract description 2
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- 238000011160 research Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
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Abstract
The invention relates to a rail transit converter water cooling system test device and a test method, wherein the rail transit converter water cooling system test device comprises a test box, and a middle partition plate is arranged in the test box to divide the interior of the test box into a dirty room and a clean room which are independent from each other and respectively close to a first end and a second end of the test box. A main air inlet is formed in the first side of the test box, a wind shield with a through hole is arranged in the dirty chamber, and the wind shield divides the dirty chamber into a wind guide cavity communicated with the main air inlet and an installation cavity close to the second side of the test box. The radiator is fixedly arranged outside the first side of the test box, and the fan and the water pump are arranged in the installation cavity. A plurality of water cooling plates are arranged in the clean room, and heating components are arranged on each water cooling plate. The device disclosed by the invention is small in volume, convenient to install and simple to operate, can be used for testing data under the independent action of the water cooling system, and is more convenient for deeply researching the attribute of the water cooling system.
Description
Technical Field
The invention relates to the technical field of cooling of rail transit vehicles, in particular to a testing device and a testing method for a water cooling system of a rail transit converter.
Background
The power unit converter is an important large-mass electric appliance part on the high-speed motor train unit, and all functions of the traction converter, the auxiliary converter and the cooling unit are integrated in a box body of the power unit converter. The traction converter mainly comprises a traction control unit, a power module, a contactor, a resonant capacitor and the like, the auxiliary converter mainly comprises an auxiliary transformer, a resonant reactor and the like, the cooling unit comprises a fan, a radiator, a water pump, a cooling water pipe and the like, the auxiliary transformer and the resonant reactor in the radiator and the auxiliary converter can be air-cooled by utilizing an air cooling system part in the cooling unit, and the power module and the like in the traction converter can be water-cooled by utilizing a water cooling part in the cooling unit. The existing converter water cooling system test is carried out by using a complete power unit converter, and the following defects exist:
firstly, the whole testing device is large and the testing method is complex; at present, a power unit converter gradually tends to be miniaturized, the integration level is high, the internal space is small, corresponding measuring points are difficult to arrange, and relevant test research is difficult to carry out; the existing converter water cooling system test data only comprises the air flow rate at the inlet of a cooling device and the water temperatures at the inlet and the outlet of the cooling device, so that the parameters such as the heat absorption capacity of air, the heat dissipation capacity of water and the like can only be roughly calculated.
Secondly, the air cooling system and the water cooling system in the whole power unit converter can work simultaneously, when the complete power unit converter is adopted for testing, the tested data is data under the cooling effect of the air cooling system and the water cooling system together, and a cooling water pipe can pass through a part without water cooling during water cooling, so that the finally tested data is not data under the simple effect of the water cooling system, and quantitative data under the independent water cooling effect of the water cooling system on a cooled device can not be accurately tested. Therefore, the existing converter water cooling system test cannot deeply research the property of the water cooling system.
Therefore, the inventor provides a rail transit converter water cooling system test device and a rail transit converter water cooling system test method by experience and practice of related industries for many years, so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a test device and a test method for a water cooling system of a rail transit converter, which have the advantages of small volume, convenience in installation and simplicity in operation, can be used for testing data under the independent action of the water cooling system, and are more convenient for deeply researching the property of the water cooling system.
The purpose of the invention can be realized by adopting the following technical scheme:
the invention provides a rail transit converter water cooling system test device which comprises a test box in a rectangular shape; the middle partition board is arranged in the test box along the width direction of the test box so as to divide the test box into a dirty chamber and a clean chamber which are independent from each other and are respectively close to the first end and the second end of the test box; a main air inlet is formed in the first side of the test box and corresponds to the dirty chamber, a wind shield with a through hole is arranged in the dirty chamber, and the wind shield divides the dirty chamber into a wind guide cavity communicated with the main air inlet and an installation cavity close to the second side of the test box; a radiator is fixedly arranged outside the first side of the test box and opposite to the position of the total air inlet, and a fan and a water pump are arranged in the installation cavity; a plurality of water cooling plates are arranged in the clean room, and heating components are arranged on each water cooling plate; the water inlet of the water pump is communicated with the water outlet of the radiator, the water outlet of the water pump is communicated with the water inlet of each water cooling plate through a corresponding pipeline, and the water outlet of each water cooling plate is communicated with the water inlet of the radiator through a corresponding pipeline.
In a preferred embodiment of the present invention, temperature sensors are disposed at the water inlet and the water outlet of the heat sink and the air inlet and the air outlet of the heat sink, a flow sensor is disposed at the water inlet of each water-cooling plate, and a static pressure sensor is disposed at the air inlet and the air outlet of the heat sink.
In a preferred embodiment of the present invention, temperature sensors are disposed at the water outlet of the water pump, the water inlet and the water outlet of each water-cooling plate, and the surface of each water-cooling plate, an air speed sensor is disposed on the air inlet surface of the heat sink, and a water pressure sensor is disposed at the water outlet of the water pump.
In a preferred embodiment of the present invention, water pressure sensors are disposed at the water inlet and the water outlet of the heat sink and the water inlet and the water outlet of each water-cooling plate.
In a preferred embodiment of the present invention, the heat generating component is a heat generating resistor block.
In a preferred embodiment of the invention, a fan partition plate parallel to the middle partition plate is arranged in the installation cavity to divide the installation cavity into a first installation chamber and a second installation chamber which are independent from each other and respectively close to the first end of the test box and the middle partition plate; the fan comprises a first fan and a second fan, and through holes are formed in the positions, corresponding to the first installation chamber and the second installation chamber, of the wind shield respectively; a first air outlet is formed in the end face of the first end of the test box, and a second air outlet is formed in the bottom face of the test box and corresponds to the second installation chamber; the first fan is arranged in the first installation chamber, the second fan and the water pump are arranged in the second installation chamber, and the water pump is arranged close to the middle partition plate; the air inlets of the first fan and the second fan are respectively arranged opposite to the corresponding through holes, and the air outlets of the first fan and the second fan are respectively arranged opposite to the first air outlet and the second air outlet.
In a preferred embodiment of the invention, the rail transit converter water cooling system test device further comprises a water inlet main pipe and a water outlet main pipe; the water inlet main pipe and the water outlet main pipe hermetically penetrate through the middle partition plate, and two ends of the water inlet main pipe and the water outlet main pipe are respectively positioned in the dirty chamber and the clean chamber; the water inlet of the water pump is connected with the water outlet of the radiator through the first branch pipe, the water outlet of the water pump is connected with the water inlet main pipe through the second branch pipe, the water inlet main pipe is connected with the water inlets of the corresponding water cooling plates through the water inlet branch pipes of the water cooling plates, the water outlets of the water cooling plates are connected with the water outlet main pipe through the water outlet branch pipes of the corresponding water cooling plates, and the water outlet main pipe is connected with the water inlet of the radiator through the third branch pipe.
In a preferred embodiment of the invention, the plate surface of each water-cooling plate is parallel to the bottom surface of the test chamber, and each heating component is mounted on the upper surface of the corresponding water-cooling plate.
In a preferred embodiment of the invention, a first mounting plate with a plate surface parallel to the side surface of the first side of the test box is arranged in the clean room, a second mounting plate with a plate surface parallel to the middle partition plate is arranged in the clean room between the first mounting plate and the first side of the test box, the second mounting plate divides the clean room between the first mounting plate and the first side of the test box into two water-cooling plate mounting rooms, and the plurality of water-cooling plates are respectively mounted in the corresponding water-cooling plate mounting rooms.
In a preferred embodiment of the invention, a side mounting opening is arranged on the first side surface of the test box and corresponds to the clean room, and a side door box cover is detachably fixed at the side mounting opening; a bottom mounting opening is formed in the bottom surface of the test box and corresponds to the position of the fan, and a bottom door box cover is detachably fixed at the bottom mounting opening.
In a preferred embodiment of the invention, the test chamber comprises a top frame and a bottom plate which are arranged at intervals up and down, a top plate covering the top of the top frame, a first end plate and a second end plate which are respectively positioned at the first end and the second end of the test chamber, and a first side plate and a second side plate which are respectively positioned at the first side and the second side of the test chamber; the main air inlet is formed in the first side plate, and the radiator is fixedly connected with the first side plate; the top and the bottom of the middle partition plate and the wind shield are respectively and fixedly connected to the top frame and the bottom plate, and the wind shield is an L-shaped plate body, and two ends of the wind shield are respectively and fixedly connected to the first end plate and the first side plate.
The invention also provides a rail transit converter water cooling system test method, which is used for testing and comprises the following steps:
s1, assembling a test box, a middle partition plate, a wind shield, a radiator, a fan, a water pump, water cooling plates and heating parts, and communicating the radiator, the water pump and the water cooling plates through corresponding pipelines; after the assembly is finished, temperature sensors are uniformly distributed at the water inlet and the water outlet of the radiator and the air inlet surface and the air outlet surface of the radiator, flow sensors are distributed at the water inlet of each water cooling plate, and static pressure sensors are uniformly distributed on the air inlet surface and the air outlet surface of the radiator;
s2, after the fan and the water pump are started, supplying power to all heating components, and setting the heating power of all heating components as rated heating power;
s3, recording the temperatures of the water inlet and the water outlet of the radiator and the temperatures of the air inlet surface and the air outlet surface of the radiator after the temperature values measured by the temperature sensors at all positions are stable, recording the temperature change curves along with time, recording the flow at the water inlet of each water cooling plate, and recording the pressure on the air inlet surface and the air outlet surface of the radiator;
s4, calculating the heat dissipation capacity of the radiator according to the temperature of the water inlet and the water outlet of the radiator, the total flow of the water inlet of each water-cooling plate, the density of water and the specific heat capacity of the water;
calculating the air pressure loss of the radiator according to the pressure difference between the air inlet surface and the air outlet surface of the radiator;
calculating to obtain the logarithmic mean temperature difference of the radiator according to the temperatures at the water inlet and the water outlet of the radiator and the temperatures on the air inlet surface and the air outlet surface of the radiator, and then calculating to obtain the heat transfer coefficient of the radiator according to the heat dissipation capacity and the logarithmic mean temperature difference of the radiator and the heat exchange area of the radiator;
judging the cooling capacity of the water cooling system according to the heat dissipation capacity, the air pressure loss and the heat transfer coefficient of the radiator;
and S5, adjusting the fan rotating speed of the fan and/or the pump speed of the water pump, and repeating the steps S3 and S4 to judge the cooling capacity of the water cooling system under different fan rotating speeds and/or pump speeds.
In a preferred embodiment of the present invention, in step S1, temperature sensors are further uniformly disposed at the water outlet of the water pump, the water inlet and the water outlet of each water-cooling plate, and the surface of each water-cooling plate, an air speed sensor is further disposed on the air inlet surface of the heat sink, and a water pressure sensor is further disposed at the water outlet of the water pump; in step S3, after the temperature values measured by the temperature sensors at the respective positions are stable, the temperatures at the water outlet of the water pump, the water inlet and the water outlet of the water cooling plates, and the surfaces of the water cooling plates are recorded together, the temperature change curves with time are recorded, the wind speed on the air inlet surface of the radiator is recorded, and the water pressure at the water outlet of the water pump is recorded.
In a preferred embodiment of the present invention, in step S1, water pressure sensors are further disposed at the water inlet and the water outlet of the heat sink and the water inlet and the water outlet of each water-cooling plate; in step S3, after the temperature values measured by the temperature sensors at the respective positions are stable, the water pressures at the water inlet and the water outlet of the radiator and the water inlets and the water outlets of the water-cooling plates are recorded together; in step S4, the flow resistance of the heat sink is calculated according to the difference between the water pressures at the water inlet and the water outlet of the heat sink, and the flow resistance of each water-cooling plate is calculated according to the difference between the water pressures at the water inlet and the water outlet of each water-cooling plate.
In the invention, one set of water cooling system part in the complete power unit converter, the fan for cooling the radiator and the related water-cooled parts are independently integrated in the test box, so that the complete power unit converter is not required to be reused when the water cooling system is tested, and the volume of the device for testing the water cooling system is effectively reduced; meanwhile, other parts or function (such as noise reduction, vibration reduction and the like) designs irrelevant to the water cooling system are reduced in the whole test device, so that on one hand, a cooling pipeline can be prevented from flowing through irrelevant parts during the test, the quantitative data of the water cooling system under the independent water cooling effect on a water-cooled device can be conveniently tested, and the deep research on the attribute of the water cooling system is facilitated; on the other hand, the testing space in the testing device can be obviously increased, the installation of related sensors and acquisition equipment is more convenient during the related testing of the water cooling system, and the operation of data acquisition on the testing site is more convenient.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: the invention provides a top view of a rail transit converter water cooling system test device without a top frame and a top plate.
FIG. 2: the side view of the rail transit converter water cooling system test device provided by the invention is that the side door box cover is not arranged on the first side.
FIG. 3: the invention provides a schematic structural diagram of a water pump matched with a water inlet main pipe, a water outlet main pipe, a first branch pipe, a second branch pipe, a third branch pipe, a water inlet branch pipe of a water-cooling plate and a water outlet branch pipe of the water-cooling plate.
FIG. 4: the invention provides a schematic diagram of the pipeline connection between the water pump and the water inlet header pipe, the water cooling plates, the water outlet header pipe and the radiator. Wherein the direction of the arrows in fig. 4 represents the direction of water flow.
FIG. 5: is a perspective view of the test chamber provided by the invention.
FIG. 6: is a perspective view of the test chamber provided by the invention when the top plate is not installed.
The reference numbers illustrate:
1. a test chamber;
11. a top frame; 111. a top plate;
12. a base plate; 121. a bottom door case cover;
13. a first end plate; 131. a first air outlet;
14. a second end plate;
15. a first side plate; 151. a main air inlet; 152. a side door case cover;
16. a second side plate;
17. a middle partition plate;
18. a dirty chamber; 181. a wind deflector; 1811. a through hole; 182. a wind guide cavity; 183. a mounting cavity; 1831. a fan baffle plate; 1832. a first installation chamber; 1833. a second installation chamber;
19. a clean room; 191. a first mounting plate; 192. a second mounting plate; 193. a water-cooling plate installation chamber;
2. a heat sink;
3. a fan; 31. a first fan; 32. a second fan;
4. a water pump; 41. a first branch pipe; 42. a second branch pipe;
5. a water-cooling plate;
6. a water inlet main pipe; 61. a water inlet branch pipe of the water cooling plate;
7. a water outlet main pipe; 71. a water outlet branch pipe of the water cooling plate; 72. a third branch pipe;
8. a temperature sensor;
9. a water pressure sensor.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1 to 6, the present embodiment provides a rail transit converter water cooling system testing apparatus, which includes a testing box 1 in a rectangular shape. An intermediate partition 17 is provided in the test chamber 1 in the width direction thereof to divide the interior of the test chamber 1 into a dirty chamber 18 and a clean chamber 19 which are independent of each other and are respectively adjacent to the first end and the second end of the test chamber 1. A main air inlet 151 is formed in the first side of the test box 1 and corresponds to the dirty chamber 18, a wind shield 181 with a through hole 1811 is arranged in the dirty chamber 18, and the wind shield 181 divides the dirty chamber 18 into a wind guide cavity 182 communicated with the main air inlet 151 and a mounting cavity 183 close to the second side of the test box 1. The radiator 2 is fixedly arranged at the position, opposite to the total air inlet 151, outside the first side of the test box 1, and the fan 3 and the water pump 4 are arranged in the mounting cavity 183. A plurality of water-cooling plates 5 are provided in the clean room 19, and heat generating components are provided on each water-cooling plate 5. The water inlet of the water pump 4 is communicated with the water outlet of the radiator 2, the water outlet of the water pump 4 is communicated with the water inlets of the water cooling plates 5 through corresponding pipelines, and the water outlets of the water cooling plates 5 are communicated with the water inlet of the radiator 2 through corresponding pipelines respectively.
For an actual power unit converter, the power unit converter comprises two radiators 2 and two water pumps 4 to form two sets of water cooling systems, and the test device in the embodiment only simulates one set of water cooling system in the power unit converter, so that the power unit converter only comprises one radiator 2 and one water pump 4. The radiator 2, the water pump 4 and each water cooling plate 5 are communicated through corresponding pipelines so as to realize the exchange of cooling liquid. The fan 3 is mainly used for providing cooling for the radiator 2 so as to ensure the working effect of the water cooling system. If the cooling capacity test, the heat dissipation capacity test, the flow resistance test of the radiator, the flow resistance test of the water cooling plate or other tests of the water cooling system need to be carried out, corresponding sensors and acquisition equipment can be additionally arranged, and the related tests can be independently carried out on the water cooling system.
Therefore, in the test device in the embodiment, one set of water cooling system part in the complete power unit converter, the fan 3 for cooling the radiator 2 and the related water-cooled part are separately integrated in the test box 1, so that the complete power unit converter is not required to be reused when the water cooling system is tested, and the volume of the device for testing the water cooling system is effectively reduced; meanwhile, other parts or function (such as noise reduction, vibration reduction and the like) designs irrelevant to the water cooling system are reduced in the whole test device, so that on one hand, a cooling pipeline can be prevented from flowing through irrelevant parts during the test, the quantitative data of the water cooling system under the independent water cooling effect on a water-cooled device can be conveniently tested, and the deep research on the attribute of the water cooling system is facilitated; on the other hand, the testing space in the testing device can be obviously increased, the installation of related sensors and acquisition equipment is more convenient during the related testing of the water cooling system, and the operation of data acquisition on the testing site is more convenient.
In a specific implementation mode, in order to facilitate the utilization of the test device for the cooling capacity test and the heat dissipation capacity test of the radiator of the water cooling system, temperature sensors 8 are arranged at the water inlet and the water outlet of the radiator 2 and on the air inlet surface and the air outlet surface of the radiator 2, flow sensors are arranged at the water inlet of each water cooling plate 5, and static pressure sensors are arranged on the air inlet surface and the air outlet surface of the radiator 2.
In order to better master the relevant conditions of the water cooling system, temperature sensors 8 are arranged at the water outlet of the water pump 4, the water inlet and the water outlet of each water cooling plate 5 and the surface of each water cooling plate 5, an air speed sensor is also arranged on the air inlet surface of the radiator 2, and a water pressure sensor 9 is also arranged at the water outlet of the water pump 4.
In order to facilitate the utilization of the test device for the flow resistance test of the radiator and the flow resistance test of the water cooling plates, water pressure sensors 9 are arranged at the water inlet and the water outlet of the radiator 2 and the water inlet and the water outlet of each water cooling plate 5.
The specific structures of the temperature sensor 8, the flow sensor, the wind speed sensor, the static pressure sensor and the water pressure sensor 9 are all the prior art, and are not described herein again.
The heating components are preferably heating resistance blocks which are mainly used for simulating components such as power modules needing water cooling in an actual power unit converter, the heating resistance blocks are utilized for simulating the components, the size is small, the price is low, and the heating resistance blocks with different heating values can be selected according to test requirements, so that more comparison tests can be conveniently carried out. Of course, other heat generating components requiring water cooling may be adopted as required, and this embodiment is merely an example.
In one embodiment, as shown in fig. 1 and 6, a blower partition 1831 is provided in the mounting chamber 183 parallel to the intermediate partition 17 to divide the mounting chamber 183 into a first mounting chamber 1832 and a second mounting chamber 1833 independent of each other and adjacent to the first end of the test chamber 1 and the intermediate partition 17, respectively. The fan 3 includes a first fan 31 and a second fan 32, and through holes 1811 are respectively opened on the wind guard 181 at positions corresponding to the first installation chamber 1832 and the second installation chamber 1833. The first end face of the test chamber 1 is provided with a first air outlet 131, and the bottom face of the test chamber 1 corresponding to the second installation chamber 1833 is provided with a second air outlet. The first fan 31 is disposed in the first installation chamber 1832, the second fan 32 and the water pump 4 are disposed in the second installation chamber 1833, and the water pump 4 is disposed near the middle partition 17. The air inlets of the first fan 31 and the second fan 32 are respectively opposite to the corresponding through holes 1811, and the air outlets of the first fan 31 and the second fan 32 are respectively opposite to the first air outlet 131 and the second air outlet.
A first fan 31 is disposed in the first installation chamber 1832, a second fan 32 is disposed in the second installation chamber 1833, and two through holes 1811 are disposed in the wind guard 181. During the test, the natural wind is sucked into the radiator 2 through the main air inlet 151, then is sucked into the first fan 31 and the second fan 32 through the corresponding through holes 1811, and finally is discharged through the first air outlet 131 and the second air outlet 32.
In this embodiment, two sets of fans 3 are provided and separated by a fan partition 1831, mainly to better simulate the real situation in the actual power unit converter, where the first fan 31 is used to simulate a fan in the actual power unit converter that is only used to cool the heat sink 2, and the second fan 32 is used to simulate a fan in the actual power unit converter that is used to cool the air-cooled component such as the auxiliary transformer and the resonant reactor and the heat sink 2 at the same time. It is to be understood that the test apparatus in this embodiment does not include components such as an auxiliary transformer and a resonance reactor that are not involved in water cooling, and the first fan 31 and the second fan 32 only function to cool the radiator 2 in this case during the test.
Of course, the number and arrangement of the specific fans 3 may be determined according to the arrangement mode of the fans in the actual power unit converter, so as to better simulate the performance of the water cooling system in the on-site power unit converter.
Further, in order to facilitate the pipeline connection among the radiator 2, the water pump 4 and the water cooling plates 5, as shown in fig. 1, 3 and 4, the rail transit converter water cooling system testing device further comprises a water inlet manifold 6 and a water outlet manifold 7. The water inlet header pipe 6 and the water outlet header pipe 7 both hermetically penetrate through the middle partition plate 17, and both ends of the water inlet header pipe 6 and the water outlet header pipe 7 are respectively positioned in the dirty chamber 18 and the clean chamber 19. The water inlet of the water pump 4 is connected with the water outlet of the radiator 2 through the first branch pipe 41, the water outlet of the water pump 4 is connected with the water inlet header pipe 6 through the second branch pipe 42, the water inlet header pipe 6 is connected with the water inlets of the corresponding water cooling plates 5 through the water cooling plate water inlet branch pipes 61, the water outlets of the water cooling plates 5 are connected with the water outlet header pipe 7 through the corresponding water cooling plate water outlet branch pipes 71, and the water outlet header pipe 7 is connected with the water inlet of the radiator 2 through the third branch pipe 72.
Specifically, the water inlet main pipe 6 and the water outlet main pipe 7 are preferably arranged in parallel and fixed on the bottom surface of the test box 1, and corresponding mounting holes are formed in the middle partition plate 17 for the water inlet main pipe 6 and the water outlet main pipe 7 to pass through in a sealing manner. Generally, a backing plate is fixedly arranged on the upper surface of the bottom of the test chamber 1 corresponding to the water pump 4, and the water pump 4 is fixedly arranged on the backing plate so as to prevent the exposed bolts for mounting the water pump 4.
The lengths of the water inlet header pipe 6 and the water outlet header pipe 7 are generally required to be equal to the lengths of the corresponding water inlet pipeline and the corresponding water outlet pipeline in the actual power unit converter, so that the actual situation can be better simulated, and the accuracy of test data can be ensured. The water inlet main pipe 6 and the water outlet main pipe 7 preferably adopt hard pipes with two closed ends, and the hard pipes can adopt metal pipes made of stainless steel, aluminum alloy or other materials, and can also adopt non-metal pipes. The second branch pipes 42 and the water inlet branch pipes 61 of the water-cooling plates are arranged on the water inlet header pipe 6 at intervals along the length direction of the water inlet header pipe 6, the third branch pipes 72 and the water outlet branch pipes 71 of the water-cooling plates are arranged on the water outlet header pipe 7 at intervals along the length direction of the water outlet header pipe 7, and the number of the water inlet branch pipes 61 of the water-cooling plates and the number of the water outlet branch pipes 71 of the water-cooling plates are the same as that of the water-cooling plates 5. The first branch pipe 41, the second branch pipe 42, the third branch pipe 72, the water-cooled plate water inlet branch pipes 61, and the water-cooled plate water outlet branch pipes 71 are preferably flexible pipes, such as metal bellows, rubber hoses, silicone hoses, and the like.
In practical use, for convenience of installation and testing, as shown in fig. 1 and 2, the plate surface of each water-cooled plate 5 is parallel to the bottom surface of the test chamber 1, and each heat-generating component is mounted on the upper surface of the corresponding water-cooled plate 5.
In order to facilitate installation of the water-cooling plates 5, as shown in fig. 1 and 6, a first mounting plate 191 having a plate surface parallel to the first side surface of the test chamber 1 is provided in the clean room 19, a second mounting plate 192 having a plate surface parallel to the intermediate partition 17 is provided in the clean room 19 between the first mounting plate 191 and the first side surface of the test chamber 1, the clean room 19 between the first mounting plate 191 and the first side surface of the test chamber 1 is partitioned into two water-cooling plate installation chambers 193 by the second mounting plate 192, and the plurality of water-cooling plates 5 are respectively installed in the corresponding water-cooling plate installation chambers 193.
For the case that the size of the water-cooling plate 5 is smaller than the width of the test chamber 1, the position of the first mounting plate 191 may be determined according to the size of the water-cooling plate 5 in the width direction of the test chamber 1 so as to fix the water-cooling plate 5. Corresponding sliding rails are provided on both sides of each water-cooled plate mounting chamber 193 (i.e., on the intermediate partition 17, the second mounting plate 192, and the second end face of the test chamber 1), and the water-cooled plates 5 can be pushed in through the corresponding sliding rails and then fixed in the clean room 19. The number of the water-cooling plates 5 may be determined according to the actual simulated power unit converter, and for example, in the present embodiment, four water-cooling plates 5 are provided in total, and two water-cooling plates 5 are provided in each water-cooling plate installation chamber 193. In addition, the first mounting plate 191 and the second mounting plate 192 are also provided with openings to facilitate the mounting and connection of the cooling pipes, and to reduce the weight of the test chamber 1.
Further, in order to facilitate installation, maintenance or replacement of the water-cooling plate 5 and the fan 3, a side installation opening is opened in a first side surface of the test chamber 1 at a position corresponding to the clean room 19, and a side door cover 152 is detachably fixed to the side installation opening. A bottom mounting opening is formed in the bottom surface of the test chamber 1 and corresponds to the position of the fan 3, and a bottom door case cover 121 is detachably fixed to the bottom mounting opening. The number of side gate covers 152 is generally the same as the number of water-cooled panel mounting chambers 193.
Further, for convenience of manufacture and installation, as shown in fig. 5 and 6, the test chamber 1 includes a top frame 11 and a bottom frame 12 spaced up and down, a top plate 111 covering the top of the top frame 11, first and second end plates 13 and 14 respectively located at first and second ends of the test chamber 1, and first and second side plates 15 and 16 respectively located at first and second sides of the test chamber 1. The main air inlet 151 is formed in the first side plate 15, and the radiator 2 is fixedly connected with the first side plate 15. The top and bottom of the middle partition 17 and the wind screen 181 are respectively and fixedly connected to the top frame 11 and the bottom plate 12, and the wind screen 181 is an L-shaped plate body and two ends of the wind screen 181 are respectively and fixedly connected to the first end plate 13 and the first side plate 15.
Whole proof box 1 is the welding box, first end plate 13, second end plate 14, first curb plate 15, second curb plate 16, intermediate bottom 17, deep bead 181, the top and the bottom of first mounting panel 191 and second mounting panel 192 are equallyd divide and are welded respectively in top frame 11 and bottom plate 12, the both ends of deep bead 181 weld respectively in first end plate 13 and first curb plate 15, fan 3 and top frame 11 and deep bead 181 rigid coupling, the both ends of first mounting panel 191 weld respectively in intermediate bottom 17 and second end plate 14. The fan partition 1831 is welded at the top and bottom thereof to the top frame 11 and the bottom plate 12, respectively, and welded at both ends thereof to the wind blocking plate 181 and the second side plate 16 to partition the first installation chamber 1832 and the second installation chamber 1833 by the fan partition 1831, thereby preventing wind drawn by the first fan 31 in the first installation chamber 1832 from interfering with wind drawn by the second fan 32 in the second installation chamber 1833. The side mounting opening is formed in the first side plate 15, and the bottom mounting opening is formed in the bottom plate 12. The water inlet manifold 6 and the water outlet manifold 7 are fixed on the bottom plate 12.
Further, the embodiment also provides a rail transit converter water cooling system test method, which is used for testing by using the rail transit converter water cooling system test device, and the rail transit converter water cooling system test method comprises the following steps:
s1, assembling the test box 1, the middle partition 17, the wind shield 181, the radiator 2, the fan 3, the water pump 4, the water cooling plates 5 and the heating components, and communicating the radiator 2, the water pump 4 and the water cooling plates 5 through corresponding pipelines; after the assembly is completed, temperature sensors 8 are uniformly arranged at the water inlet and the water outlet of the radiator 2 and the air inlet surface and the air outlet surface of the radiator 2, flow sensors are distributed at the water inlet of each water cooling plate 5, and static pressure sensors are uniformly arranged on the air inlet surface and the air outlet surface of the radiator 2.
After step S1 is completed, the power cables of the fan 3, the water pump 4 and the heat generating components are led out of the test box 1, and the extension lines of the sensors are led out of the test box 1 and connected to a data collecting device (prior art) to collect the relevant data for detection.
And S2, after the fan 3 and the water pump 4 are started, supplying power to each heating component, and setting the heating power of each heating component as rated heating power.
S3, after the temperature values measured by the temperature sensors 8 at the positions are stable, recording the temperatures at the water inlet and the water outlet of the radiator 2 and the temperatures on the air inlet surface and the air outlet surface of the radiator 2, recording the temperature change curves along with time, recording the flow at the water inlet of each water-cooling plate 5, and recording the pressures on the air inlet surface and the air outlet surface of the radiator 2.
S4, calculating the heat dissipation capacity Qw of the radiator 2 according to the temperatures of the water inlet and the water outlet of the radiator 2, the total flow of the water inlet of each water cooling plate 5, the density of water and the specific heat capacity of the water;
calculating the air pressure loss delta Pa of the radiator 2 according to the pressure difference between the air inlet surface and the air outlet surface of the radiator 2;
calculating to obtain the logarithmic mean temperature difference of the radiator 2 according to the temperatures at the water inlet and the water outlet of the radiator 2 and the temperatures on the air inlet surface and the air outlet surface of the radiator 2, and then calculating to obtain the heat transfer coefficient K of the radiator 2 according to the heat dissipation capacity Qw of the radiator 2, the logarithmic mean temperature difference and the heat exchange area of the radiator 2 (namely the area of the air inlet surface of the radiator 2);
judging the cooling capacity of the water cooling system according to the heat dissipation capacity Qw, the air pressure loss delta Pa and the heat transfer coefficient K of the radiator 2;
and S5, adjusting the rotating speed of the fan 3 and/or the pump speed of the water pump 4, and repeating the steps S3 and S4 to judge the cooling capacity of the water cooling system at different rotating speeds and/or pump speeds of the fan 3.
The specific calculation formulas of the heat dissipation amount Qw, the air pressure loss delta Pa and the heat transfer coefficient K are all existing formulas. The test method is used for testing the cooling capacity of the water cooling system and the heat dissipation capacity of the radiator, the higher the heat dissipation capacity Qw is, the stronger the cooling capacity of the water cooling system is, the higher the heat transfer coefficient K is, the higher the heat exchange efficiency of the radiator 2 in the water cooling system is, and the smaller the air pressure loss delta Pa is, the smaller the air side flow resistance of the radiator in the water cooling system is.
More preferably, in step S1, temperature sensors 8 are further disposed at the water outlet of the water pump 4, the water inlet and the water outlet of each water-cooling plate 5, and the surface of each water-cooling plate 5, an air speed sensor is further disposed on the air inlet surface of the radiator 2, and a water pressure sensor 9 is further disposed at the water outlet of the water pump 4.
In step S3, after the temperature values measured by the temperature sensors 8 at the respective positions are stable, the temperatures at the water outlet of the water pump 4, the water inlets and the water outlets of the water cooling plates 5, and the surfaces of the water cooling plates 5 are recorded together, and a curve of the temperature change with time is recorded, the wind speed on the air inlet surface of the radiator 2 is recorded, and the water pressure at the water outlet of the water pump 4 is recorded; so as to better master the relevant conditions of the water cooling system.
Further, in order to simultaneously perform the flow resistance test of the radiator and the flow resistance test of the water-cooling plates by using the above test method, in step S1, water pressure sensors 9 are further arranged at the water inlet and the water outlet of the radiator 2 and the water inlet and the water outlet of each water-cooling plate 5;
in step S3, after the temperature values measured by the temperature sensors 8 at the respective positions are stable, the water pressures at the water inlet and the water outlet of the radiator 2 and the water inlet and the water outlet of the water-cooling plates 5 are recorded together;
in step S4, the flow resistance of the radiator 2 is calculated from the difference between the water pressures at the water inlet and the water outlet of the radiator 2, and the flow resistance of each water-cooled plate 5 is calculated from the difference between the water pressures at the water inlet and the water outlet of each water-cooled plate 5. The specific calculation formula for each flow resistance is an existing formula.
Generally, a temperature sensor 8 is respectively arranged at a water inlet and a water outlet of the radiator 2, an air inlet surface and an air outlet surface of the radiator 2, a water outlet of the water pump 4 and a water inlet and a water outlet of each water cooling plate 5; a plurality of temperature sensors 8 can be correspondingly arranged on the surface of each water-cooling plate 5 according to the number and position requirements of required temperature measuring points, and a flow sensor is respectively arranged at the water inlet of each water-cooling plate 5. And a static pressure sensor is respectively arranged on the air inlet surface and the air outlet surface of the radiator 2. As shown in fig. 1 and 3, the temperature sensor 8 and the water pressure sensor 9 at the water outlet of the water pump 4 may be disposed on the water inlet manifold 6 and near the water pump 4, and the temperature sensor 8 and the water pressure sensor 9 at the water inlet of the radiator 2 may be disposed on the water outlet manifold 7 and near the radiator 2; in general, the temperature sensor 8 and the water pressure sensor 9 of the water inlet manifold 6 and the water outlet manifold 7 are provided in the clean room 19, and the intermediate partition 17 may be formed in a shape of a shaped plate recessed toward the dirty room 18 at the position of the sensor, so as to fully utilize the space in the test chamber 1. When the wind speed on the air inlet surface of the radiator 2 is measured, the air inlet surface can be divided into a plurality of areas, the wind speed of each area is measured respectively, and then the average wind speed of the air inlet surface can be calculated.
Of course, the test method that can be realized by using the test apparatus is not limited to the above-mentioned cooling capacity test of the water cooling system (the test is the most complicated and perfect test item for the whole water cooling system), the heat dissipation capacity test of the heat sink, the flow resistance test of the heat sink, and the flow resistance test of the water cooling plate, and the test apparatus can be used for performing other test items of the water cooling system according to actual needs to better understand the attribute of the water cooling system. In addition, the radiator 2, the water pump 4 and the fan 3 can be of different types according to the specific requirements of the water cooling system test, and different heating values can be selected for each heating resistance block to meet different test requirements.
In summary, the rail transit converter water cooling system test device and the test method in the embodiment are designed for solving the problem that the rail transit converter water cooling system in the prior art has no special test device and test method, and can complete the independent research test of the converter water cooling system. Aiming at the actual requirements of the water cooling system test, the internal structural design and layout of the whole test device are optimized, so that the parts and functional designs irrelevant to the water cooling system are reduced; meanwhile, a cooling pipeline in the box is optimized, functions irrelevant to a water cooling system are reduced, and heating components are simulated by heating resistance blocks which are smaller in size and convenient to replace different heating values; the volume of the test device is effectively reduced, the test space of the water cooling system in the test device is obviously increased, the volume is small, the installation is convenient, the stability is good, the firmness is good, the reliability of test data is higher, the installation of components such as a sensor is convenient, each component can be easily and quickly installed and replaced, and the comparison research of multiple components is convenient; the method for testing the cooling capacity of the water cooling system, the heat dissipation capacity of the radiator, the flow resistance of the radiator and the flow resistance of the water cooling plate is simple to operate and high in data accuracy.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (14)
1. A rail transit converter water cooling system test device is characterized by comprising a test box in a rectangular shape;
a middle partition board is arranged in the test box along the width direction of the test box so as to divide the test box into a dirty room and a clean room which are independent from each other and are respectively close to the first end and the second end of the test box; a main air inlet is formed in the first side of the test box and corresponds to the dirty chamber, a wind shield with a through hole is arranged in the dirty chamber, and the wind shield divides the dirty chamber into a wind guide cavity communicated with the main air inlet and an installation cavity close to the second side of the test box; a radiator is fixedly arranged outside the first side of the test box and opposite to the position of the main air inlet, and a fan and a water pump are arranged in the mounting cavity; a plurality of water cooling plates are arranged in the clean room, and each water cooling plate is provided with a heating component;
the water inlet of the water pump is communicated with the water outlet of the radiator, the water outlet of the water pump is communicated with the water inlet of each water cooling plate through a corresponding pipeline, and the water outlet of each water cooling plate is communicated with the water inlet of the radiator through a corresponding pipeline.
2. The rail transit converter water cooling system test device of claim 1,
temperature sensors are arranged at the water inlet and the water outlet of the radiator and the air inlet surface and the air outlet surface of the radiator, a flow sensor is arranged at the water inlet of each water cooling plate, and a static pressure sensor is arranged on the air inlet surface and the air outlet surface of the radiator.
3. The rail transit converter water cooling system test device of claim 2,
temperature sensors are arranged at the water outlet of the water pump, the water inlet and the water outlet of each water cooling plate and the surface of each water cooling plate, an air speed sensor is also arranged on the air inlet surface of the radiator, and a water pressure sensor is also arranged at the water outlet of the water pump.
4. The rail transit converter water cooling system test device of claim 2,
and water pressure sensors are arranged at the water inlet and the water outlet of the radiator and at the water inlet and the water outlet of each water cooling plate.
5. The rail transit converter water cooling system test device of claim 1,
the heating component is a heating resistance block.
6. The rail transit converter water cooling system test device of claim 1,
a fan partition plate parallel to the middle partition plate is arranged in the installation cavity to divide the installation cavity into a first installation chamber and a second installation chamber which are independent of each other and respectively close to the first end of the test box and the middle partition plate; the fan comprises a first fan and a second fan, and the through holes are formed in the positions, corresponding to the first installation chamber and the second installation chamber, of the wind shield respectively;
a first air outlet is formed in the end face of the first end of the test box, and a second air outlet is formed in the bottom face of the test box and corresponds to the second installation chamber; the first fan is arranged in the first installation chamber, the second fan and the water pump are arranged in the second installation chamber, and the water pump is arranged close to the middle partition plate; the air inlets of the first fan and the second fan are respectively opposite to the corresponding through holes, and the air outlets of the first fan and the second fan are respectively opposite to the first air outlet and the second air outlet.
7. The rail transit converter water cooling system test device of claim 1,
the rail transit converter water cooling system test device also comprises a water inlet main pipe and a water outlet main pipe; the water inlet main pipe and the water outlet main pipe hermetically penetrate through the middle partition plate, and two ends of the water inlet main pipe and the water outlet main pipe are respectively positioned in the dirty chamber and the clean chamber;
the water inlet of water pump through first branch pipe with the delivery port of radiator is connected, the delivery port of water pump pass through the second branch pipe with the water inlet manifold is connected, on the water inlet manifold through a plurality of water-cooling board water inlet branch pipes respectively with correspond the water inlet of water-cooling board is connected, each the delivery port of water-cooling board respectively through the water-cooling board that corresponds go out the water branch pipe with the water outlet manifold is connected, the water outlet manifold pass through the third branch pipe with the water inlet of radiator is connected.
8. The rail transit converter water cooling system test device of claim 1,
the plate surface of each water cooling plate is parallel to the bottom surface of the test box, and each heating component is arranged on the upper surface of the corresponding water cooling plate.
9. The rail transit converter water cooling system test device of claim 8,
be equipped with the face in the clean room and be on a parallel with the first mounting panel of the first side of proof box first mounting panel with between the first side of proof box be equipped with the face in the clean room and be on a parallel with intermediate bottom's second mounting panel, the second mounting panel will first mounting panel with between the first side of proof box two water-cooling board installation rooms are separated into to the clean room, and are a plurality of the water-cooling board is installed respectively and is being corresponded in the water-cooling board installation room.
10. The rail transit converter water cooling system test device of claim 1,
a side mounting opening is formed in the first side surface of the test box and corresponds to the clean room, and a side door box cover is detachably fixed at the side mounting opening; and a bottom mounting opening is formed in the bottom surface of the test box and corresponds to the position of the fan, and a bottom door box cover is detachably fixed at the bottom mounting opening.
11. The rail transit converter water cooling system test device of claim 1,
the test box comprises a top frame and a bottom plate which are arranged at intervals up and down, a top plate covering the top of the top frame, a first end plate and a second end plate which are respectively positioned at the first end and the second end of the test box, and a first side plate and a second side plate which are respectively positioned at the first side and the second side of the test box;
the main air inlet is formed in the first side plate, and the radiator is fixedly connected with the first side plate; the middle partition board and the top and the bottom of the wind shield are fixedly connected to the top frame and the bottom plate respectively, and the wind shield is an L-shaped board body, and two ends of the wind shield are fixedly connected to the first end plate and the first side plate respectively.
12. A rail transit converter water cooling system test method is characterized in that the rail transit converter water cooling system test device as claimed in any one of claims 1 to 11 is used for testing, and the rail transit converter water cooling system test method comprises the following steps:
s1, assembling the test box, the intermediate partition board, the wind shield, the radiator, the fan, the water pump, the water cooling plates and the heating components, and communicating the radiator, the water pump and the water cooling plates through corresponding pipelines; after the assembly is finished, temperature sensors are uniformly distributed at the water inlet and the water outlet of the radiator and the air inlet surface and the air outlet surface of the radiator, flow sensors are distributed at the water inlet of each water cooling plate, and static pressure sensors are also uniformly distributed on the air inlet surface and the air outlet surface of the radiator;
s2, after the fan and the water pump are started, supplying power to the heating parts, and setting the heating power of the heating parts as rated heating power;
s3, after the temperature values measured by the temperature sensors at each position are stable, recording the temperatures at the water inlet and the water outlet of the radiator and the temperatures on the air inlet surface and the air outlet surface of the radiator, recording the temperature change curves along with time, recording the flow at the water inlet of each water cooling plate, and recording the pressures on the air inlet surface and the air outlet surface of the radiator;
s4, calculating the heat dissipation capacity of the heat radiator according to the temperature of the water inlet and the water outlet of the heat radiator, the total flow of the water inlet of each water-cooling plate, the density of water and the specific heat capacity of the water;
calculating the air pressure loss of the radiator according to the pressure difference between the air inlet surface and the air outlet surface of the radiator;
calculating to obtain the logarithmic mean temperature difference of the radiator according to the temperatures at the water inlet and the water outlet of the radiator and the temperatures on the air inlet surface and the air outlet surface of the radiator, and then calculating to obtain the heat transfer coefficient of the radiator according to the heat dissipation capacity of the radiator, the logarithmic mean temperature difference and the heat exchange area of the radiator;
judging the cooling capacity of the water cooling system according to the heat dissipation capacity of the radiator, the air pressure loss and the heat transfer coefficient;
s5, adjusting the fan rotating speed of the fan and/or the pump speed of the water pump, and repeating the steps S3 and S4 to judge the cooling capacity of the water cooling system under different fan rotating speeds and/or pump speeds.
13. The rail transit converter water cooling system test method as claimed in claim 12,
in step S1, temperature sensors are uniformly distributed at the water outlet of the water pump, the water inlet and the water outlet of each water cooling plate, and the surface of each water cooling plate, an air speed sensor is also distributed on the air inlet surface of the radiator, and a water pressure sensor is also distributed at the water outlet of the water pump;
in step S3, after the temperature values measured by the temperature sensors at the respective positions are stable, the temperatures at the water outlet of the water pump, the water inlet and the water outlet of the water cooling plates, and the surfaces of the water cooling plates are recorded together, and a temperature change curve with time is recorded, and the wind speed on the air inlet surface of the radiator and the water pressure at the water outlet of the water pump are recorded.
14. The rail transit converter water cooling system test method as claimed in claim 12,
in step S1, water pressure sensors are also arranged at the water inlet and the water outlet of the heat sink and at the water inlet and the water outlet of each water cooling plate;
in step S3, after the temperature values measured by the temperature sensors at the respective positions are stable, the water pressures at the water inlet and the water outlet of the radiator and the water inlet and the water outlet of the water cooling plate are recorded together;
in step S4, the flow resistance of the heat sink is calculated according to the difference between the water pressures at the water inlet and the water outlet of the heat sink, and the flow resistance of each water-cooling plate is calculated according to the difference between the water pressures at the water inlet and the water outlet of each water-cooling plate.
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| CN112964750B (en) | 2024-05-14 |
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