CN112964750B - Test device and test method for water cooling system of rail transit converter - Google Patents
Test device and test method for water cooling system of rail transit converter Download PDFInfo
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- CN112964750B CN112964750B CN202110381044.3A CN202110381044A CN112964750B CN 112964750 B CN112964750 B CN 112964750B CN 202110381044 A CN202110381044 A CN 202110381044A CN 112964750 B CN112964750 B CN 112964750B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 530
- 238000001816 cooling Methods 0.000 title claims abstract description 244
- 238000012360 testing method Methods 0.000 title claims abstract description 175
- 238000010998 test method Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims description 19
- 230000017525 heat dissipation Effects 0.000 claims description 14
- 238000012546 transfer Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 7
- 230000036962 time dependent Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000002829 reductive effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance 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
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012545 processing Methods 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- 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 test device and a test method for a water cooling system of a rail transit converter, wherein the test device for the water cooling system of the rail transit converter comprises a test box, wherein an intermediate baffle is arranged in the test box so as to divide the test box into a dirty chamber and a clean chamber which are mutually independent and are respectively close to a first end and a second end of the test box. A main air inlet is formed in a 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 an air guide cavity communicated with the main air inlet and a mounting cavity close to a second side of the test box. A radiator is fixedly arranged outside the first side of the test box, 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 device has the advantages of small volume, convenient installation and simple operation, can be used for testing data under the independent action of the water cooling system, and is more convenient for in-depth 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 test device and a test method for a water cooling system of a rail transit converter.
Background
The power unit converter is an important high-quality electric appliance component on the high-speed motor train unit, and all functions of the traction converter, the auxiliary converter and the cooling unit are integrated in the box body of the power unit converter. 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 air cooling system part in the cooling unit can be used for air cooling the radiator and the auxiliary transformer and the resonant reactor in the auxiliary converter, and the water cooling part in the cooling unit can be used for water cooling the power module and the like in the traction converter. 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 test device is huge, and the test method is complex; at present, the power unit converter gradually tends to be miniaturized, the integration level is higher, the internal space is small, corresponding measuring points are difficult to lay, and related test research is difficult to carry out; the test data of the existing converter water cooling system only comprise the inlet air flow velocity of the cooling device and the inlet and outlet water temperature of the cooling device, so that parameters such as the air heat absorption capacity, the water heat dissipation capacity and the like can only be roughly calculated.
And secondly, the air cooling system and the water cooling system in the whole power unit converter can work simultaneously, when the whole power unit converter is adopted for testing, the measured test data are data under the joint cooling effect of the air cooling system and the water cooling system, and the cooling water pipe can pass through a part without water cooling when water cooling is carried out, so that the finally measured data are not data under the simple effect of the water cooling system, and the quantitative data of the water cooling system under the independent water cooling effect of the cooled device can not be accurately measured. Therefore, the conventional converter water cooling system test cannot deeply study the properties of the water cooling system.
Therefore, the inventor provides a test device and a test method for a water cooling system of a rail transit converter by virtue of 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 are small in size, convenient to install and simple to operate, can be used for testing data under the independent action of the water cooling system, and are more convenient for in-depth researching the properties of the water cooling system.
The aim of the invention can be achieved by adopting the following technical scheme:
The invention provides a test device for a water cooling system of a rail transit converter, which comprises 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 chamber and a clean chamber which are mutually independent and 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 position of 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 an air 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 at the position which is outside the first side of the test box and is opposite to 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 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 inlets of the water cooling plates through corresponding pipelines, and the water outlets of the water cooling plates are respectively communicated with the water inlet of the radiator through corresponding pipelines.
In a preferred embodiment of the invention, temperature sensors are arranged at the water inlet and the water outlet of the radiator and on the air inlet surface and the air outlet surface of the radiator, flow sensors are arranged at the water inlet of each water cooling plate, and static pressure sensors are also arranged on the air inlet surface and the air outlet surface of the radiator.
In a preferred embodiment of the invention, temperature sensors are arranged at the water outlet of the water pump, at the water inlet and the water outlet of each water cooling plate and on 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.
In a preferred embodiment of the invention, 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.
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 baffle plate parallel to the middle baffle plate is arranged in the mounting cavity to divide the mounting cavity into a first mounting chamber and a second mounting chamber which are mutually independent and respectively close to the first end of the test box and the middle baffle plate; the fan comprises a first fan and a second fan, and through holes are formed in the wind shield at positions corresponding to the first mounting chamber and the second mounting chamber 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 position of 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 opposite to the corresponding through holes respectively, and the air outlets of the first fan and the second fan are opposite to the first air outlet and the second air outlet respectively.
In a preferred embodiment of the invention, the water cooling system test device of the rail transit converter further comprises a water inlet main pipe and a water outlet main pipe; the water inlet main pipe and the water outlet main pipe are sealed to pass through the middle partition plate, and the 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 a first branch pipe, the water outlet of the water pump is connected with the water inlet main pipe through a second branch pipe, the water inlet main pipe is respectively connected with the water inlets of the corresponding water cooling plates through a plurality of water cooling plate water inlet branch pipes, the water outlets of the water cooling plates are respectively connected with the water outlet main pipe through corresponding water cooling plate water outlet branch pipes, and the water outlet main pipe is connected with the water inlet of the radiator through a 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 box, 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 first side surface 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 chambers, and a plurality of water cooling plates are respectively arranged in the corresponding water cooling plate mounting chambers.
In a preferred embodiment of the invention, 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; the bottom mounting opening is formed in the bottom surface of the test box and corresponds to the position of the fan, and the 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 which covers the top of the top frame, a first end plate and a second end plate which are respectively positioned at a first end and a second end of the test chamber, and a first side plate and a second side plate which are respectively positioned at a first side and a 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 fixedly connected with the top frame and the bottom plate, the wind shield is an L-shaped plate body, and two ends of the wind shield are respectively fixedly connected with the first end plate and the first side plate.
The invention also provides a test method of the water cooling system of the rail transit converter, which is carried out by using the test device of the water cooling system of the rail transit converter, and comprises the following steps:
S1, assembling a test box, an intermediate baffle, a wind shield, a radiator, a fan, a water pump, water cooling plates and 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 on 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 uniformly distributed on 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, power is supplied to each heating component, and the heating power of each heating component is set to be rated heating power;
S3, after the temperature values measured by the temperature sensors at all positions are stable, recording the temperatures at the water inlet and the water outlet of the radiator and the air inlet surface and the air outlet surface of the radiator, recording the time-varying curve of the temperatures, 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 to obtain the heat dissipation capacity of the radiator according to the temperatures 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 according to the pressure difference between the air inlet surface and the air outlet surface of the radiator to obtain the air pressure loss of the radiator;
Calculating 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 to obtain the logarithmic average temperature difference of the radiator, and then calculating according to the heat dissipation capacity of the radiator, the logarithmic average temperature difference and the heat exchange area of the radiator to obtain the heat transfer coefficient 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;
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 at different fan rotating speeds and/or pump speeds.
In a preferred embodiment of the present invention, in step S1, temperature sensors are uniformly distributed at the water outlet of the water pump, at the water inlet and the water outlet of each water cooling plate, and on the surface of each water cooling plate, wind speed sensors are further distributed on the air inlet surface of the radiator, and water pressure sensors are further 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 inlets and the water outlets of the water cooling plates, and the surfaces of the water cooling plates are recorded, the time-dependent temperature change curves 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 also uniformly distributed 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; in step S3, after the temperature values measured by the temperature sensors at all positions are stable, the water pressures 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 are recorded; in step S4, the flow resistance of the radiator is calculated according to the difference between the water pressure at the water inlet and the water pressure at the water outlet of the radiator, and the flow resistance of each water-cooling plate is calculated according to the difference between the water pressure at the water inlet and the water pressure at the water outlet of each water-cooling plate.
According to 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, the design of other parts or functions (such as noise reduction, vibration reduction and the like) which are not related to the water cooling system is reduced in the whole test device, on one hand, the cooling pipeline can be prevented from flowing through the unrelated parts during the test, the quantitative data of the water cooling system under the independent water cooling effect of the water cooled device can be conveniently tested, and the property of the water cooling system can be further researched; on the other hand, the test space in the test device can be obviously increased, the installation of the related sensor and the acquisition equipment during the related test of the water cooling system is more convenient, and the operation of data acquisition on the test site is more convenient.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
Fig. 1: the invention provides a top view of a water cooling system test device of a rail transit converter when a top frame and a top plate are not installed.
Fig. 2: the side view of the water cooling system test device for the rail transit converter is provided when the side door box cover is not installed on the first side of the water cooling system test device for the rail transit converter.
Fig. 3: the water pump provided by the invention is 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 water pump is connected with a water inlet main pipe, water cooling plates, a water outlet main pipe and a radiator through pipelines. Wherein the arrow direction in fig. 4 represents the water flow direction.
Fig. 5: a perspective view of the test chamber provided by the invention.
Fig. 6: the test chamber provided by the invention is provided with a perspective view when a top plate is not installed.
Reference numerals illustrate:
1. A test chamber;
11. a top frame; 111. a top plate;
12. a bottom 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 total 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. an air guide cavity; 183. a mounting cavity; 1831. a fan separator; 1832. a first installation chamber; 1833. a second installation chamber;
19. Clean room; 191. a first mounting plate; 192. a second mounting plate; 193. a water-cooled plate installation chamber;
2. A heat sink;
3.A blower; 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
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 to 6, the embodiment provides a test device for a water cooling system of a rail transit converter, which comprises a test box 1 in a rectangular shape. An intermediate partition 17 is provided in the test chamber 1 in its width direction to divide the test chamber 1 into a dirty chamber 18 and a clean chamber 19 which are independent of each other and are adjacent to the first and second ends of the test chamber 1, respectively. A main air inlet 151 is formed in the first side of the test chamber 1 and corresponds to the position of 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 an air guide cavity 182 communicated with the main air inlet 151 and a mounting cavity 183 close to the second side of the test chamber 1. A radiator 2 is fixedly arranged at the position which is outside the first side of the test chamber 1 and is opposite to the main air inlet 151, and a fan 3 and a 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 respectively communicated with the water inlet of the radiator 2 through corresponding pipelines.
For an actual power unit converter, two radiators 2 and two water pumps 4 are included 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 test device only comprises one radiator 2 and one water pump 4. The radiator 2, the water pump 4 and the water cooling plates 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 water cooling system cooling capacity test, the radiator heat dissipation capacity test, the radiator flow resistance test, the water cooling plate flow resistance test or other tests are required to be carried out, corresponding sensors and acquisition equipment can be additionally arranged, and the water cooling system can be independently subjected to related tests.
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 related water cooled parts are independently integrated in the test box 1, 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, the design of other parts or functions (such as noise reduction, vibration reduction and the like) which are not related to the water cooling system is reduced in the whole test device, on one hand, the cooling pipeline can be prevented from flowing through the unrelated parts during the test, the quantitative data of the water cooling system under the independent water cooling effect of the water cooled device can be conveniently tested, and the property of the water cooling system can be further researched; on the other hand, the test space in the test device can be obviously increased, the installation of the related sensor and the acquisition equipment during the related test of the water cooling system is more convenient, and the operation of data acquisition on the test site is more convenient.
In a specific implementation mode, in order to facilitate the water cooling system cooling capacity test and the radiator cooling capacity test by using the test device, 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 also arranged on the air inlet surface and the air outlet surface of the radiator 2.
In order to better grasp the related conditions of the water cooling system, temperature sensors 8 are arranged at the water outlet of the water pump 4, at the water inlets and the water outlets of the water cooling plates 5 and on the surfaces of the water cooling plates 5, an air speed sensor is further arranged on the air inlet surface of the radiator 2, and a water pressure sensor 9 is further arranged at the water outlet of the water pump 4.
In order to facilitate the flow resistance test of the radiator and the flow resistance test of the water-cooling plates by using the test device, water pressure sensors 9 are arranged at the water inlet and the water outlet of the radiator 2 and at 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 of the prior art, and are not described herein.
The heating component is preferably a heating resistor block and is mainly used for simulating components such as a power module and the like which need water cooling in an actual power unit converter, the heating resistor block is used for simulating the heating resistor block with small volume and low price, and heating resistor blocks with different heating values can be selected according to test requirements so as to facilitate more comparison tests. Of course, other heat generating components requiring water cooling may be used as the heat generating components as required, and this embodiment is merely illustrative.
In one embodiment, as shown in FIGS. 1 and 6, a fan baffle 1831 is provided within the mounting chamber 183 parallel to the intermediate baffle 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 the first end of the test chamber 1 and the intermediate baffle 17, respectively. The fan 3 includes a first fan 31 and a second fan 32, and through holes 1811 are formed in the wind guard 181 at positions corresponding to the first installation chamber 1832 and the second installation chamber 1833, respectively. A first air outlet 131 is formed in the first end face of the test chamber 1, and a second air outlet is formed in the bottom face of the test chamber 1 at a position corresponding to the second installation chamber 1833. 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 adjacent to the intermediate 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.
Wherein, a first fan 31 is arranged in the first installation chamber 1832, a second fan 32 is arranged in the second installation chamber 1833, and two through holes 1811 are arranged on the wind shield 181. When the test is performed, natural wind is sucked into the radiator 2 through the total air inlet 151, then is sucked into the first fan 31 and the second fan 32 through the corresponding through holes 1811, and finally, the wind sucked into the first fan 31 and the second fan 32 is discharged through the first air outlet 131 and the second air outlet respectively.
In this embodiment, two sets of fans 3 are provided and separated by a fan separator 1831, so as to better simulate the real situation in the actual power unit converter, the first fan 31 is used for simulating the fan used for cooling only the radiator 2 in the actual power unit converter, and the second fan 32 is used for simulating the fan used for cooling the auxiliary transformer, the resonant reactor and other components and the radiator 2 in the actual power unit converter. It will be appreciated that the test apparatus in this embodiment is not provided with components such as auxiliary transformers and resonance reactors which are not related to water cooling, and the first fan 31 and the second fan 32 only serve to cool the radiator 2 at the time of the test.
Of course, the number and arrangement of the specific fans 3 may be determined according to the arrangement manner of the fans in the actual power unit converter, so as to better simulate the performance of the water cooling system in the power unit converter in the field.
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 test device for the water cooling system of the rail transit converter further comprises a water inlet main pipe 6 and a water outlet main pipe 7. The water inlet main pipe 6 and the water outlet main pipe 7 are sealed through the middle partition plate 17, and two ends of the water inlet main pipe 6 and the water outlet main 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 a first branch pipe 41, the water outlet of the water pump 4 is connected with the water inlet main pipe 6 through a second branch pipe 42, the water inlet main pipe 6 is respectively connected with the water inlets of the corresponding water cooling plates 5 through a plurality of water cooling plate water inlet branch pipes 61, the water outlet of each water cooling plate 5 is respectively connected with the water outlet main pipe 7 through a corresponding water cooling plate water outlet branch pipe 71, and the water outlet main pipe 7 is connected with the water inlet of the radiator 2 through a third branch pipe 72.
In particular, the water inlet manifold 6 and the water outlet manifold 7 are preferably arranged in parallel and fixed on the bottom surface of the test chamber 1, and corresponding mounting holes are formed in the middle partition plate 17 so as to allow the water inlet manifold 6 and the water outlet manifold 7 to pass through in a sealing manner. A backing plate is generally fixed on the upper surface of the bottom of the test box 1 corresponding to the water pump 4, and the water pump 4 is fixed on the backing plate so as to avoid the exposure of bolts for installing the water pump 4.
The lengths of the water inlet main pipe 6 and the water outlet main 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 are preferably hard pipes with closed ends, and the hard pipes can be metal pipes made of stainless steel, aluminum alloy or other materials, or nonmetallic pipes. The second branch pipes 42 and the water-cooling plate water inlet branch pipes 61 are distributed on the water inlet main pipe 6 at intervals along the length direction of the water inlet main pipe 6, the third branch pipes 72 and the water-cooling plate water outlet branch pipes 71 are distributed on the water outlet main pipe 7 at intervals along the length direction of the water outlet main pipe 7, and the number of the water-cooling plate water inlet branch pipes 61 and the number of the water-cooling plate water outlet branch pipes 71 are the same as the number of the water-cooling plates 5. The first branch pipe 41, the second branch pipe 42, the third branch pipe 72, each water-cooled plate water inlet branch pipe 61, and each water-cooled plate water outlet branch pipe 71 are preferably flexible pipes such as metal bellows, rubber flexible pipes, silicone flexible pipes, 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 cooling plate 5 is parallel to the bottom surface of the test chamber 1, and each heating component is mounted on the upper surface of the corresponding water cooling plate 5.
In order to facilitate the installation of the water cooling plates 5, as shown in fig. 1 and 6, a first installation 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 installation plate 192 having a plate surface parallel to the intermediate partition 17 is provided in the clean room 19 between the first installation plate 191 and the first side of the test chamber 1, the second installation plate 192 divides the clean room 19 between the first installation plate 191 and the first side of the test chamber 1 into two water cooling plate installation chambers 193, and the plurality of water cooling plates 5 are respectively installed in the corresponding water cooling plate installation chambers 193.
For the case where the size of the water-cooling plate 5 is smaller than the width of the test box 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 box 1 so as to fix the water-cooling plate 5. Corresponding rails are provided on both sides of the respective water-cooled panel installation chamber 193 (i.e. on the intermediate screen 17, the second installation plate 192 and the second end face of the test chamber 1), by means of which the water-cooled panel 5 can be pushed in and then fastened in the clean room 19. The number of water-cooling plates 5 may be determined according to the actual power unit converter to be simulated, and for example, four water-cooling plates 5 are provided in the present embodiment, and two water-cooling plates 5 are provided in each water-cooling plate installation chamber 193. In addition, openings are generally formed in the first mounting plate 191 and the second mounting plate 192, so that the mounting connection of the cooling pipes is facilitated, and the weight of the test chamber 1 can be reduced.
Further, in order to facilitate installation, maintenance or replacement of the water cooling plate 5 and the fan 3, a side mounting port is opened at a first side surface of the test box 1 at a position corresponding to the clean room 19, and a side door cover 152 is detachably fixed at the side mounting port. A bottom mounting opening is formed in the bottom surface of the test chamber 1 at a position corresponding to the fan 3, and a bottom door case cover 121 is detachably fixed to the bottom mounting opening. The number of side door cases 152 is generally the same as the number of water-cooled panel mounting chambers 193.
Further, for ease of processing and installation, the test chamber 1 includes a top frame 11 and a bottom plate 12 disposed at an upper and lower interval, a top plate 111 covering the top of the top frame 11, first and second end plates 13 and 14 at the first and second ends of the test chamber 1, respectively, and first and second side plates 15 and 16 at the first and second sides of the test chamber 1, respectively, as shown in fig. 5 and 6. The main air inlet 151 is formed on 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 guard 181 are respectively and fixedly connected to the top frame 11 and the bottom plate 12, the wind guard 181 is an L-shaped plate body, and two ends of the wind guard 181 are respectively and fixedly connected to the first end plate 13 and the first side plate 15.
The whole test box 1 is a welding box body, the top and the bottom of a first end plate 13, a second end plate 14, a first side plate 15, a second side plate 16, an intermediate baffle 17, a wind guard 181, a first mounting plate 191 and a second mounting plate 192 are respectively welded on a top frame 11 and a bottom plate 12, two ends of the wind guard 181 are respectively welded on the first end plate 13 and the first side plate 15, a fan 3 is fixedly connected with the top frame 11 and the wind guard 181, and two ends of the first mounting plate 191 are respectively welded on the intermediate baffle 17 and the second end plate 14. The top and bottom of the fan baffle 1831 are welded to the top frame 11 and the bottom plate 12, respectively, and both ends thereof are welded to the wind deflector 181 and the second side plate 16, so as to separate the first installation chamber 1832 and the second installation chamber 1833 by the fan baffle 1831, and prevent the wind sucked by the first fan 31 in the first installation chamber 1832 from interfering with the wind sucked by the second fan 32 in the second installation chamber 1833. The side mounting openings are formed in the first side plate 15, and the bottom mounting opening is formed in the bottom plate 12. The water inlet header 6 and the water outlet header 7 are fixed on the bottom plate 12.
Further, the embodiment also provides a test method for the water cooling system of the rail transit converter, which is used for testing the water cooling system of the rail transit converter, and comprises the following steps:
S1, assembling a test box 1, an intermediate baffle 17, a wind shield 181, a radiator 2, a fan 3, a water pump 4, water cooling plates 5 and 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 distributed on 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 uniformly distributed on the water inlet of each water cooling plate 5, and static pressure sensors are uniformly distributed on the air inlet surface and the air outlet surface of the radiator 2.
After step S1 is completed, the fan 3, the water pump 4 and the power supply cables of each heating component are led out of the test box 1 respectively, and the extension lines of each sensor are led out of the test box 1 and connected with a data acquisition device (prior art) so as to conveniently acquire the detected related data.
S2, after the fan 3 and the water pump 4 are started, power is supplied to each heating component, and the heating power of each heating component is set to be rated heating power.
S3, after the temperature values measured by the temperature sensors 8 at all positions are stable, recording the temperatures 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, recording the time-dependent change curve of the temperatures, recording the flow at the water inlet of each water cooling plate 5, and recording the pressure on the air inlet surface and the air outlet surface of the radiator 2.
S4, calculating to obtain the heat dissipation quantity Qw of the radiator 2 according to the temperatures at the water inlet and the water outlet of the radiator 2, the total flow at the water inlet of each water cooling plate 5, the density of water and the specific heat capacity of water;
Calculating to obtain 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;
The logarithmic average temperature difference of the radiator 2 is calculated 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 the heat transfer coefficient K of the radiator 2 is calculated according to the heat dissipation quantity Qw of the radiator 2, the logarithmic average 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 dissipating capacity Qw, the air pressure loss delta Pa and the heat transfer coefficient K of the radiator 2;
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 capacity Qw, the air pressure loss Δpa 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, wherein 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 uniformly distributed at the water outlet of the water pump 4, at the water inlet and the water outlet of each water cooling plate 5, and on the surface of each water cooling plate 5, an air speed sensor is further distributed on the air inlet surface of the radiator 2, and a water pressure sensor 9 is further distributed 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 surface of the water cooling plates 5 are recorded, the time-dependent curve of the temperatures 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 grasp the related 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-cooled plates by using the above-mentioned test method, in step S1, water pressure sensors 9 are uniformly distributed at the water inlet and the water outlet of the radiator 2 and at the water inlet and the water outlet of each water-cooled 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 at the water inlet and the water outlet of each water cooling plate 5 are recorded;
In step S4, the flow resistance of the radiator 2 is calculated from the difference in water pressure at the water inlet and the water outlet of the radiator 2, and the flow resistance of each water-cooling plate 5 is calculated from the difference in water pressure at the water inlet and the water outlet of each water-cooling plate 5. The specific calculation formula for each flow resistance is the existing formula.
A temperature sensor 8 is generally arranged at the water inlet and the water outlet of the radiator 2, on the air inlet surface and the air outlet surface of the radiator 2, at the water outlet of the water pump 4 and at the water inlet and the water outlet of each water cooling plate 5 respectively; a plurality of temperature sensors 8 can be correspondingly arranged on the surface of each water cooling plate 5 according to the number and the position requirements of the required temperature measuring points, and one 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 provided on the water inlet manifold 6 at a position close to 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 provided on the water outlet manifold 7 at a position close to the radiator 2; the temperature sensor 8 and the water pressure sensor 9 on the water inlet manifold 6 and the water outlet manifold 7 are generally arranged in the clean room 19, and the middle partition plate 17 can be made into a shape of a special plate recessed towards 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 speeds of the areas are measured respectively, and then the average wind speed of the air inlet surface can be calculated.
Of course, the test method that can be implemented by using the test device is not limited to the above-mentioned water cooling system cooling capacity test (the test is the most complex and perfect test item point for the whole water cooling system), radiator cooling capacity test, radiator flow resistance test and water cooling plate flow resistance test, and other water cooling system test items can be performed by using the test device according to actual needs, so as to better understand the properties of the water cooling system. In addition, the radiator 2, the water pump 4 and the fan 3 can also be selected to be different in model according to specific requirements of a water cooling system test, and the heating resistor blocks can be selected to be different in heating value so as to meet different test requirements.
In summary, the test device and the test method for the water cooling system of the rail transit converter in the embodiment are designed to solve the problem that the water cooling system of the rail transit converter in the prior art has no special test device and test method, and can complete independent research test of the water cooling system of the converter. The whole test device optimizes the internal structural design and layout of the power unit converter relatively complete according to the actual requirement of the water cooling system test, and reduces the parts and functional designs irrelevant to the water cooling system; meanwhile, the cooling pipeline in the box is optimized, functions irrelevant to a water cooling system are reduced, and the heating component is simulated by adopting heating resistor 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 a water cooling system in the test device is obviously increased, the test device is small in volume, convenient to install, good in stability and firmness, stronger in test data reliability, convenient to install components such as a sensor, and capable of being easily and quickly installed and replaced, and convenient for comparing and researching multiple components; 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 foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (3)
1. The test method for the water cooling system of the rail transit converter is characterized in that the test is carried out by using a test device of the water cooling system of the rail transit converter, and the test carried out by using the test device of the water cooling system of the rail transit converter comprises 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 chamber and a clean chamber which are mutually independent and are 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 and corresponds to the position of 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 a mounting cavity close to the second side of the test box; a radiator is fixedly arranged at the position which is outside the first side of the test box and is opposite to 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 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 corresponding pipelines, and the water outlet of each water cooling plate is communicated with the water inlet of the radiator through corresponding pipelines respectively;
The heating component is a heating resistor block; a fan baffle plate parallel to the middle baffle plate is arranged in the mounting cavity so as to divide the mounting cavity into a first mounting chamber and a second mounting chamber which are mutually independent and respectively close to the first end of the test box and the middle baffle plate; the fan comprises a first fan and a second fan, and the positions of the wind shield, which correspond to the first installation chamber and the second installation chamber respectively, are provided with through holes; 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;
The test device of the water cooling system of the rail transit converter further comprises a water inlet main pipe and a water outlet main pipe; the water inlet main pipe and the water outlet main pipe are sealed to 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 a first branch pipe, the water outlet of the water pump is connected with the water inlet main pipe through a second branch pipe, the water inlet main pipe is respectively connected with the water inlets of the corresponding water cooling plates through a plurality of water cooling plate water inlet branch pipes, the water outlet of each water cooling plate is respectively connected with the water outlet main pipe through a corresponding water cooling plate water outlet branch pipe, and the water outlet main pipe is connected with the water inlet of the radiator through a third branch pipe;
The plate surfaces of the water cooling plates are parallel to the bottom surface of the test box, and the heating parts are arranged on the upper surfaces of the corresponding water cooling plates; a first mounting plate with a plate surface parallel to the first side surface 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 clean room between the first mounting plate and the first side of the test box is divided into two water cooling plate mounting chambers by the second mounting plate, and a plurality of water cooling plates are respectively mounted in the corresponding water cooling plate mounting chambers; 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; 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;
The test box comprises a top frame, a bottom plate, a top plate, a first end plate, a second end plate, a first side plate and a second side plate, wherein the top frame and the bottom plate are arranged at intervals up and down, the top plate covers the top of the top frame, the first end plate and the second end plate are respectively positioned at the first end and the second end of the test box, and the first side plate and the second side plate 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 top and the bottom of the middle partition plate and the top and the bottom of the wind shield are respectively fixedly connected with the top frame and the bottom plate, the wind shield is an L-shaped plate body, and two ends of the wind shield are respectively fixedly connected with the first end plate and the first side plate;
the test method of the water cooling system of the rail transit converter comprises the following steps:
s1, assembling the test box, the middle partition plate, 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 on 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 uniformly distributed on 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, power is supplied to each heating component, and the heating power of each heating component is set to be rated heating power;
S3, after the temperature values measured by the temperature sensors at all positions are stable, recording the temperatures at the water inlet and the water outlet of the radiator and the air inlet surface and the air outlet surface of the radiator, recording the time-dependent temperature change curve, 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 temperatures 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 water;
calculating according to the pressure difference between the air inlet surface and the air outlet surface of the radiator to obtain the air pressure loss of the radiator;
Calculating to obtain a logarithmic average 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 a heat transfer coefficient of the radiator according to the heat dissipation capacity of the radiator, the logarithmic average temperature difference and the heat exchange area of the radiator;
Judging the cooling capacity of a 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 at different fan rotating speeds and/or pump speeds.
2. The test method of the water cooling system of the rail transit converter according to claim 1, wherein,
In step S1, temperature sensors are uniformly distributed at the water outlet of the water pump, at the water inlet and the water outlet of each water cooling plate and on the surface of each water cooling plate, wind speed sensors are also distributed on the air inlet surface of the radiator, and water pressure sensors are 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 each water cooling plate, and the surface of each water cooling plate are recorded, the time-dependent curve of the temperatures is 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.
3. The test method of the water cooling system of the rail transit converter according to claim 1, wherein,
In step S1, water pressure sensors are also uniformly distributed 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;
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 at the water inlet and the water outlet of each water cooling plate are recorded;
In step S4, the flow resistance of the radiator is calculated according to the difference between the water pressure at the water inlet and the water pressure at the water outlet of the radiator, and the flow resistance of each water-cooling plate is calculated according to the difference between the water pressure at the water inlet and the water pressure at the water outlet of the water-cooling plate.
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| CN114136530B (en) * | 2021-11-23 | 2023-10-13 | 中国铁道科学研究院集团有限公司 | Method and device for determining inlet and outlet air pressure difference of converter |
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| CN206212552U (en) * | 2016-11-28 | 2017-05-31 | 株洲中车时代电气股份有限公司 | A kind of traction convertor for track traffic |
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