CN113109387B - Rail transit converter air cooling system test device and test method - Google Patents
Rail transit converter air cooling system test device and test method Download PDFInfo
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- CN113109387B CN113109387B CN202110365998.5A CN202110365998A CN113109387B CN 113109387 B CN113109387 B CN 113109387B CN 202110365998 A CN202110365998 A CN 202110365998A CN 113109387 B CN113109387 B CN 113109387B
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- 238000012360 testing method Methods 0.000 title claims abstract description 216
- 238000001816 cooling Methods 0.000 title claims abstract description 110
- 238000010998 test method Methods 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 27
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000036962 time dependent Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims 4
- 230000009471 action Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000005192 partition Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- 238000011160 research Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000052 comparative 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 an air cooling system of a rail transit converter, wherein the test device for the air cooling system of the rail transit converter comprises a test box, main air inlets are symmetrically arranged on two side surfaces of the test box and close to a first end of the test box, wind shields with through holes are arranged in the test box, and heat radiators are fixedly arranged on the outer parts of the two sides of the test box and opposite to the positions of the main air inlets. A first fan is arranged in a fan installation chamber formed between the two wind shields. An auxiliary transformer and a resonance reactor are arranged in the test box and close to the second end of the test box, and a first air outlet is formed in the bottom surface of the test box and close to the second end of the test box. 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 air cooling system, and is more convenient for in-depth researching the attribute of the air 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 an air 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 air cooling system test is carried out by using a complete power unit converter, so that 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; in addition, the test data of the existing converter air cooling system only comprise the inlet air flow rate of the cooling device, so that only parameters such as air flow rate and the like can be calculated.
Secondly, the air cooling system and the water cooling system in the whole power unit converter can work simultaneously, and when the whole power unit converter is adopted for testing, the tested data are data under the combined cooling action of the air cooling system and the water cooling system; besides the cooled devices needing air cooling, other electric devices needing no air cooling are arranged in the dirty chamber, and when the test is carried out, the air can flow through the electric devices; therefore, the finally measured data is not the data under the pure action of the air cooling system, and the quantitative data of the air cooling system under the independent air cooling action of the cooled device cannot be accurately measured. Therefore, the existing converter air cooling system test cannot deeply study the properties of the air cooling system.
Therefore, the inventor provides a test device and a test method for an air 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 an air cooling system of a rail transit converter, which have the advantages of small size, convenience in installation and simplicity in operation, can be used for testing data under the independent action of the air cooling system, and are more convenient for in-depth research on the properties of the air cooling system.
The aim of the invention can be achieved by adopting the following technical scheme:
The invention provides a test device of an air cooling system of a rail transit converter, which comprises a test box in a rectangular shape; the two sides of the test box are symmetrically provided with the main air inlets close to the first end of the test box, the positions corresponding to the main air inlets in the test box are respectively provided with a wind shield with a through hole, the wind shields and the test box are enclosed to form a wind guide cavity communicated with the corresponding main air inlets, and the positions, opposite to the main air inlets, of the two sides of the test box are fixedly provided with radiators; a first fan is arranged in a fan installation chamber formed between the two wind shields, an air inlet of the first fan is opposite to the corresponding through hole, and an air outlet of the first fan is arranged towards the second end of the test box; an auxiliary transformer and a resonance reactor which are arranged side by side along the width direction of the test box are arranged in the test box and close to the second end of the test box, and a first air outlet is formed in the bottom surface of the test box and close to the second end of the test box.
In a preferred embodiment of the present invention, a plurality of temperature sensors are provided on the surfaces of the auxiliary transformer and the resonant reactor.
In a preferred embodiment of the invention, side mounting openings are symmetrically arranged on the two side surfaces of the test box and close to the second end of the test box, and a side door box cover is detachably fixed at the side mounting openings.
In a preferred embodiment of the invention, the ventilation surface of each radiator facing the outside of the test chamber is divided into a plurality of areas, and each area is provided with a wind speed sensor.
In a preferred embodiment of the invention, a fan partition board is arranged in the fan installation chamber along the width direction of the test chamber so as to divide the fan installation chamber into a first fan chamber and a second fan chamber which are mutually independent, the second fan chamber is arranged close to the first end of the test chamber, and a second air outlet is formed in the bottom surface of the test chamber and corresponds to the second fan chamber; two through holes are formed in each wind shield and are respectively communicated with the first fan chamber and the second fan chamber, the first fan is arranged in the first fan chamber, the second fan is arranged in the second fan chamber, an air inlet of the second fan is opposite to the corresponding through hole, and an air outlet of the second fan is opposite to the second air outlet.
In a preferred embodiment of the invention, a first mounting opening is formed in the bottom surface of the test box and corresponds to the fan mounting chamber, and a first bottom door box cover is detachably fixed at the first mounting opening.
In a preferred embodiment of the invention, a second mounting port and a third mounting port are respectively arranged on the bottom surface of the test box and correspond to the auxiliary transformer and the resonance reactor, and a second bottom door box cover and a third bottom door box cover are respectively detachably fixed at the second mounting port and the third mounting port.
In a preferred embodiment of the invention, a heat-insulating material layer is arranged on the top inner surface of the test box and corresponds to the auxiliary transformer and the resonance reactor, and the bottom surface of the heat-insulating material layer can be abutted against the upper surface of the auxiliary transformer and the resonance reactor.
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 covered on 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 two side plates positioned at two sides of the test chamber; the main air inlet is formed on the corresponding side plate, and the radiator is fixedly connected with the corresponding side plate; the wind shield is a U-shaped plate body with an opening facing the corresponding total air inlet, two ends of the U-shaped plate body are fixedly connected with the corresponding side plates, and the top and the bottom of the U-shaped plate body are fixedly connected with the top frame and the bottom plate respectively; the second end plate is opposite to the auxiliary transformer and the resonance reactor, an external air channel part is formed by recessing from inside to outside, and the first air outlet is formed on the bottom surface of the external air channel part.
The invention also provides a test method of the air cooling system of the rail transit converter, which is carried out by using the test device of the air cooling system of the rail transit converter, and comprises the following steps:
S1, assembling a test box, a wind shield, a radiator, a first fan, an auxiliary transformer and a resonance reactor, and correspondingly arranging a plurality of temperature sensors on the surface of the auxiliary transformer and the resonance reactor according to the number and position requirements of required temperature measuring points after the assembly is completed;
S2, after the first fan is started, supplying power to the auxiliary transformer and the resonance reactor, and setting the heating power of the auxiliary transformer and the resonance reactor as rated heating power;
S3, after the temperature values measured by the temperature sensors are stable, recording a time-dependent temperature change curve of each temperature measuring point, recording temperature stable values of each temperature measuring point, and calculating the difference value between each temperature stable value and the ambient temperature to obtain the surface temperature rise of each temperature measuring point;
S4, adjusting the rotating speed of the first fan, repeating the step S3, and comparing the temperature change curves of the temperature measuring points at different rotating speeds of the fan along with time and the temperature rise of the surface to judge the cooling capacity of the air cooling system at different rotating speeds of the fan.
The invention also provides a test method of the air cooling system of the rail transit converter, which is carried out by using the test device of the air cooling system of the rail transit converter, and comprises the following steps:
S1, assembling a test box, a wind shield, a radiator, a first fan, an auxiliary transformer and a resonance reactor, dividing the assembled air surface of each radiator facing the outside of the test box into a plurality of areas, and arranging an air speed sensor on each area;
s2, starting a first fan;
s3, detecting the wind speed of the corresponding area through each wind speed sensor, calculating to obtain the average wind speed corresponding to the radiator according to the wind speed detected by each wind speed sensor corresponding to the radiator, and calculating to obtain the corresponding air quantity of the radiator according to the average wind speed and the ventilation surface area of the radiator.
By the method, the air cooling system part and the related air cooled parts in the complete power unit converter are independently integrated in the test box, the complete power unit converter is not required to be reused when the air cooling system is tested, and the volume of a device for testing the air cooling system is effectively reduced; meanwhile, other parts or functions (such as noise reduction, vibration reduction and the like) which are not related to the air cooling system are reduced in the whole test device, on one hand, the air flow can be prevented from flowing through the irrelevant parts during the test, the test of quantitative data of the air cooling system under the effect of independently air cooling the cooled device is facilitated, and the deep study of the properties of the air cooling system is facilitated; on the other hand, the test space inside the test device can be remarkably increased, the test of the cooling capacity of the air cooling system, the air quantity test of the radiator or the installation of related sensors and acquisition equipment during other tests can be more conveniently carried out, and the operation of data acquisition on the test site can be more conveniently carried out.
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 perspective view of a test device for an air cooling system of a rail transit converter, wherein a top frame and a top plate are not installed.
Fig. 2: is a top view of fig. 1.
Fig. 3: a perspective view of the test chamber provided by the invention.
Fig. 4: the test chamber provided by the invention is a perspective view when the top frame and the top plate are not installed.
Fig. 5: an enlarged view of a portion of fig. 4 at a.
Reference numerals illustrate:
1. A test chamber;
11. a top frame; 111. a top plate;
12. a bottom plate; 121. a first bottom door case cover; 122. a second bottom door case cover; 123. a third bottom door cover;
13. a first end plate;
14. A second end plate; 141. an external air duct part;
15. a side plate; 151. a total air inlet; 152. a side door case cover;
16. A wind deflector; 161. a through hole;
17. An air guide cavity;
18. A fan installation chamber; 181. a fan separator; 182. a first fan chamber; 183. a second fan chamber;
2. A heat sink;
3. a first fan;
4. a second fan;
5. an auxiliary transformer;
6. A resonant reactor.
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 5, this embodiment provides a test device for an air cooling system of a rail transit converter, including a test box 1 in a rectangular shape, total air inlets 151 are symmetrically arranged at positions on two sides of the test box 1 and close to a first end of the test box, air shields 16 with through holes 161 are respectively arranged at positions corresponding to the total air inlets 151 in the test box 1, the air shields 16 and the test box 1 are enclosed to form an air guide cavity 17 communicated with the corresponding total air inlets 151, and a radiator 2 is fixedly arranged at positions corresponding to the total air inlets 151 outside two sides of the test box 1. A first fan 3 is arranged in a fan installation chamber 18 formed between the two wind shields 16, an air inlet of the first fan 3 is opposite to the corresponding through hole 161, and an air outlet of the first fan 3 is arranged towards the second end of the test box 1. An auxiliary transformer 5 and a resonance reactor 6 which are arranged side by side along the width direction of the test chamber 1 are arranged in the test chamber 1 and near the second end of the test chamber 1, and a first air outlet is formed in the bottom surface of the test chamber 1 and near the second end of the test chamber.
When the whole air cooling system test device adopts a forced air cooling mode, natural air is sucked into the radiator 2 through the total air inlets 151 at two sides of the test box 1, flows through the radiator 2, then enters the corresponding air guide cavity 17, is sucked into the first fan 3 through the corresponding through hole 161, is blown to the auxiliary transformer 5 and the resonance reactor 6, cools the auxiliary transformer 5 and the resonance reactor, and is finally discharged through the first air outlet. If the cooling capacity test (namely the dirty room temperature rise test), the radiator air quantity test or other tests of the air cooling system are required to be carried out, corresponding sensors and acquisition equipment can be additionally arranged, and the air cooling system can be independently subjected to related tests.
Therefore, in the test device in the embodiment, the air cooling system part in the complete power unit converter and related air-cooled parts are independently integrated in the test box 1, the complete power unit converter is not required to be reused when the air cooling system is tested, and the volume of the device for testing the air cooling system is effectively reduced; meanwhile, other parts or functions (such as noise reduction, vibration reduction and the like) which are not related to the air cooling system are reduced in the whole test device, on one hand, the air flow can be prevented from flowing through the irrelevant parts during the test, the test of quantitative data of the air cooling system under the effect of independently air cooling the cooled device is facilitated, and the deep study of the properties of the air cooling system is facilitated; on the other hand, the test space inside the test device can be remarkably increased, the test of the cooling capacity of the air cooling system, the air quantity test of the radiator or the installation of related sensors and acquisition equipment during other tests can be more conveniently carried out, and the operation of data acquisition on the test site can be more conveniently carried out.
In a specific implementation manner, in order to facilitate the test of the cooling capacity of the air cooling system by using the test device, a plurality of temperature sensors are arranged on the surfaces of the auxiliary transformer 5 and the resonance reactor 6 (prior art).
Side mounting openings are symmetrically formed in the two side surfaces of the test chamber 1 and close to the second end of the test chamber, and side door box covers 152 are detachably fixed to the side mounting openings, so that an operator can conveniently arrange temperature sensors on the surfaces of the auxiliary transformer 5 and the resonance reactor 6 through the side door box covers 152.
In order to facilitate the radiator air volume test by using the test device, the ventilation surface of each radiator 2 facing the outside of the test box 1 (i.e., the air inlet surface of the radiator 2) is divided into a plurality of areas, and each area is provided with an air velocity sensor (which may also be referred to as an anemometer, and the specific structure is the prior art).
In one embodiment, as shown in fig. 1 and 4, a fan partition 181 is disposed in the fan installation chamber 18 along the width direction of the test chamber 1, so as to partition the fan installation chamber 18 into a first fan chamber 182 and a second fan chamber 183 that are independent of each other, the second fan chamber 183 is disposed near the first end of the test chamber 1, and a second air outlet is provided at a position corresponding to the second fan chamber 183 on the bottom surface of the test chamber 1. Two through holes 161 are formed in each wind shield 16 and are respectively communicated with the first fan chamber 182 and the second fan chamber 183, the first fan 3 is arranged in the first fan chamber 182, the second fan 4 is arranged in the second fan chamber 183, an air inlet of the second fan 4 is opposite to the corresponding through hole 161, and an air outlet of the second fan 4 is opposite to the second air outlet. Generally, two first fans 3 are provided in the first fan chamber 182, and two second fans 4 are provided in the second fan chamber 183.
In the actual power unit converter, in order to ensure the heat dissipation effect, two fan chambers are generally separated by the fan partition plate 181 and two groups of fans are arranged, so that when the actual power unit converter works, natural wind is sucked through the total air inlets 151 at two sides, flows through the radiator 2 and then is sucked into the first fan 3 in the first fan chamber 182 and the second fan 4 in the second fan chamber 183 respectively, and the wind sucked into the first fan chamber 182 is blown to the auxiliary transformer 5 and the resonance reactor 6 again through the first fan 3 to cool the auxiliary transformer and finally is discharged through the first air outlet; the air sucked into the second fan chamber 183 is directly discharged from the second air outlet through the second fan 4. The heat dissipation channel that first fan room 182 and first air outlet constitute mainly plays the heat dissipation effect to radiator 2, auxiliary transformer 5 and resonance reactor 6, and the heat dissipation channel that second fan room 183 and second air outlet constitute mainly plays the heat dissipation effect to radiator 2, and both mutually support, have improved the radiating effect greatly.
Therefore, in this embodiment, the fan partition 181 is also used to separate two fan chambers, so as to better simulate the air cooling condition in the actual power unit converter. It should be noted that, the test device in this embodiment mainly tests the attribute of the air cooling system, so the radiator 2 is not working during the test, and only plays a role of blocking the wind resistance of the air at the main air inlet 151, so as to better simulate the real situation.
Of course, the number and arrangement of the specific fans can be determined according to the arrangement mode of the fans in the actual power unit converter, so that the performance of the air cooling system in the power unit converter in the field can be better simulated.
Further, in order to facilitate installation, maintenance or replacement of each fan and the auxiliary transformer 5 and the resonance reactor 6, as shown in fig. 2, a first installation opening is provided at a position corresponding to the fan installation chamber 18 on the bottom surface of the test box 1, and a first bottom door cover 121 is detachably fixed at the first installation opening. A second mounting port and a third mounting port are respectively formed in the bottom surface of the test box 1 and correspond to the auxiliary transformer 5 and the resonance reactor 6, and a second bottom door box cover 122 and a third bottom door box cover 123 are detachably fixed at the second mounting port and the third mounting port respectively.
The number of the first mounting openings may depend on the number of fans, for example, in this embodiment, two first mounting openings are provided in total, where one first mounting opening corresponds to two fans near one of the heat sinks 2, and the other first mounting opening corresponds to two fans near the other heat sink 2.
Preferably, a heat-insulating material layer (for example, various rubber and plastic heat-insulating material layers can be adopted as the prior art) is arranged on the top inner surface of the test box 1 and corresponds to the auxiliary transformer 5 and the resonance reactor 6, and the bottom surface of the heat-insulating material layer can be abutted against the upper surface of the auxiliary transformer 5 and the resonance reactor 6. The tightness between the top of the test box 1 and the upper surface of the auxiliary transformer 5 and the resonance reactor 6 is ensured, the air flow is prevented from flowing away from the test box, the air cooling effect and the test accuracy are affected, and more air flows to the cooled device are ensured.
Further, for convenience of processing and installation, as shown in fig. 3 and 4, 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, a first end plate 13 and a second end plate 14 respectively located at a first end and a second end of the test chamber 1, and two side plates 15 located at both sides of the test chamber 1. The main air inlet 151 is formed on the corresponding side plate 15, and the radiator 2 is fixedly connected with the corresponding side plate 15. The wind guard 16 is a U-shaped plate body with an opening facing the corresponding total air inlet 151, two ends of the U-shaped plate body are fixedly connected with the corresponding side plates 15, and the top and the bottom of the U-shaped plate body are fixedly connected with the top frame 11 and the bottom plate 12 respectively. The second end plate 14 is opposite to the auxiliary transformer 5 and the resonance reactor 6 and is recessed from inside to outside to form an external air channel portion 141, and the first air outlet is formed on the bottom surface of the external air channel portion 141.
The whole test box 1 is a welded box body, the top and the bottom of the first end plate 13, the second end plate 14, the side plate 15 and the wind shield 16 are respectively welded on the top frame 11 and the bottom plate 12, two ends of the wind shield 16 are welded on the corresponding side plates 15, and each fan can be connected with the corresponding wind shield 16. The top and bottom of the fan partition 181 are welded to the top frame 11 and the bottom plate 12, respectively, and both ends thereof are welded to the two wind shields 16, so as to separate the first fan chamber 182 and the second fan chamber 183 through the fan partition 181, and prevent the wind sucked by the first fan 3 in the first fan chamber 182 from interfering with the wind sucked by the second fan 4 in the second fan chamber 183. The side mounting openings are formed in the corresponding side plates 15, and the first mounting opening, the second mounting opening and the third mounting opening are formed in the bottom plate 12. The external air channel portion 141 may be formed by providing a mounting opening on the second end plate 14 and fixedly connecting an external plate body.
Further, in this embodiment, a method for testing an air cooling system of a rail transit converter is further provided, and the method is mainly used for testing the cold zone capacity (i.e. dirty room temperature rise test) of the air cooling system by using the device for testing the air cooling system of the rail transit converter, and the method for testing the air cooling system of the rail transit converter includes the following steps:
S1, assembling the test box 1, the wind shield 16, the radiator 2, the first fan 3, the auxiliary transformer 5 and the resonance reactor 6, and correspondingly arranging a plurality of temperature sensors on the surface of the auxiliary transformer 5 and the resonance reactor 6 according to the number and position requirements of required temperature measuring points after the assembly is completed.
After step S1 is completed, the power supply cables of the fan, the auxiliary transformer 5 and the resonant reactor 6 are led out of the test box 1 respectively, and meanwhile, the connecting wires of the temperature sensors are led out of the test box 1 and connected with a data acquisition device (prior art) so as to conveniently acquire the detected temperature data.
S2, after the first fan 3 is started, power is supplied to the auxiliary transformer 5 and the resonance reactor 6, and the heating power of the auxiliary transformer 5 and the resonance reactor 6 is set to be rated heating power.
In step S2, if the second fan 4 is further provided, the second fan 4 needs to be turned on at the same time. The radiator 2 does not work, and only plays a role in simulating wind resistance of an actual installation structure, so that the property of the air cooling system under the independent action is better tested.
S3, after the temperature values measured by the temperature sensors are stable, recording a time-dependent temperature change curve of each temperature measuring point, recording temperature stable values of each temperature measuring point, and calculating the difference value between each temperature stable value and the ambient temperature to obtain the surface temperature rise of each temperature measuring point.
S4, adjusting the rotating speed of the first fan 3, repeating the step S3, and comparing the temperature change curves of the temperature measuring points at different rotating speeds of the fans with the time and the temperature rise of the surfaces to judge the cooling capacity of the air cooling system at different rotating speeds of the fans.
Wherein, the smaller the surface Wen Shengyue, the stronger the cooling capacity; according to the temperature change curve along with time, the speed of temperature rise can be seen, and then the cooling capacity of the air-out cooling system under different fan rotating speeds can be compared, the operation is simple and convenient, the whole test process is tested by adopting the test device, other parts irrelevant to air cooling are not arranged in the test box 1, the quantitative data of the air-cooled system under the effect of independently carrying out air cooling on the cooled device can be accurately tested, and the property of the air-cooled system can be further studied. And the test space inside the whole test box 1 is larger, so that the temperature sensors are more convenient to install.
Further, in this embodiment, a method for testing an air cooling system of a rail transit converter is further provided, and the method for testing an air cooling system of a rail transit converter is mainly used for testing the air quantity of a radiator, and includes the following steps:
s1, assembling the test box 1, the wind shield 16, the radiator 2, the first fan 3, the auxiliary transformer 5 and the resonance reactor 6, dividing the ventilation surface of each radiator 2 facing the outside of the test box 1 into a plurality of areas after the assembly is completed, and arranging a wind speed sensor in each area.
S2, starting the first fan 3.
In step S2, only the first fan 3 may be turned on, and if the second fan 4 is further provided, the second fan 4 may be turned on at the same time. The radiator 2 does not work and only plays a role in simulating wind resistance of an actual installation structure; in addition, since whether the auxiliary transformer 5 and the resonance reactor 6 are operated in the radiator air volume test has little influence on the air volume of the radiator 2, the auxiliary transformer and the resonance reactor can be not electrified; however, the auxiliary transformer 5 and the resonant reactor 6 are required to be installed in the test box 1 to simulate the wind resistance of the actual installation structure, and more accurately test the wind quantity of each radiator 2.
S3, detecting the wind speed of a corresponding area through each wind speed sensor, calculating to obtain the average wind speed corresponding to the radiator 2 according to the wind speed measured by each wind speed sensor corresponding to the radiator 2, and calculating to obtain the corresponding air quantity of the radiator 2 according to the average wind speed and the ventilation surface area of the radiator 2. It will be appreciated that since one of the two heat sinks 2 is closer to the auxiliary transformer 5 and the other is closer to the resonant reactor 6, the air volumes of the two heat sinks 2 are not generally the same.
Of course, the test method which can be realized by using the test device is not limited to the test of the cooling capacity of the air cooling system (the test is aimed at the most complex and perfect test item point of the whole air cooling system) and the air quantity test of the radiator, and other test items of the air cooling system can be performed by using the test device according to actual needs so as to better understand the attribute of the air cooling system. In addition, the radiator 2, the auxiliary transformer 5, the resonant reactor 6 and each fan can be selected to meet different test requirements according to specific requirements of an air cooling system test.
In summary, the test device and the test method for the air cooling system of the rail transit converter in the embodiment are designed to solve the problem that the air 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 air cooling system of the converter. The whole test device reduces the parts and functional designs irrelevant to the air cooling system, remarkably increases the test space of the air cooling system, has small volume, convenient installation, good stability and good firmness, has higher reliability of test data, is more convenient for installing the parts such as the sensor and the like, and simultaneously, each part can be easily and quickly installed and replaced, thereby being convenient for the comparative research of multiple parts; the method for testing the cooling capacity of the air cooling system and the air quantity of the radiator 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 (2)
1. The rail transit converter air cooling system test method is characterized by comprising the steps of utilizing a rail transit converter air cooling system test device to test, wherein the rail transit converter air cooling system test device comprises a rectangular test box; the two sides of the test box are symmetrically provided with the total air inlets close to the first end of the test box, the positions, corresponding to the total air inlets, in the test box are provided with wind shields with through holes, the wind shields are enclosed with the test box to form wind guide cavities communicated with the corresponding total air inlets, and the positions, opposite to the total air inlets, of the two sides of the test box are fixedly provided with radiators; a first fan is arranged in a fan installation chamber formed between the two wind shields, an air inlet of the first fan is opposite to the corresponding through hole, and an air outlet of the first fan is arranged towards the second end of the test box; an auxiliary transformer and a resonance reactor which are arranged side by side along the width direction of the test box are arranged in the test box and close to the second end of the test box, and a first air outlet is formed in the bottom surface of the test box and close to the second end of the test box;
A plurality of temperature sensors are arranged on the surfaces of the auxiliary transformer and the resonant reactor; the two side surfaces of the test box are symmetrically provided with side mounting openings near the second end of the test box, and a side door box cover is detachably fixed at the side mounting openings; a fan baffle plate is arranged in the fan installation chamber along the width direction of the test chamber so as to divide the fan installation chamber into a first fan chamber and a second fan chamber which are mutually independent, wherein the second fan chamber is arranged close to the first end of the test chamber, and a second air outlet is formed in the bottom surface of the test chamber and at a position corresponding to the second fan chamber; two through holes are formed in each wind shield and are respectively communicated with the first fan chamber and the second fan chamber, the first fan is arranged in the first fan chamber, a second fan is arranged in the second fan chamber, an air inlet of the second fan is opposite to the corresponding through hole, and an air outlet of the second fan is opposite to the second air outlet;
A first mounting port is formed in the bottom surface of the test box and corresponds to the fan mounting chamber, and a first bottom door box cover is detachably fixed at the first mounting port; a second mounting port and a third mounting port are respectively formed in the bottom surface of the test box and correspond to the auxiliary transformer and the resonance reactor, and a second bottom door box cover and a third bottom door box cover are respectively detachably fixed at the second mounting port and the third mounting port; a heat insulation material layer is arranged on the inner surface of the top of the test box and corresponds to the auxiliary transformer and the resonant reactor, and the bottom surface of the heat insulation material layer can be abutted against the upper surfaces of the auxiliary transformer and the resonant reactor;
the test box comprises a top frame, a bottom plate, a top plate, a first end plate, a second end plate and two side plates, 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 two side plates are positioned at two sides of the test box; the main air inlet is formed in the corresponding side plate, and the radiator is fixedly connected with the corresponding side plate; the wind shield is a U-shaped plate body with an opening facing the corresponding total air inlet, two ends of the U-shaped plate body are fixedly connected with the corresponding side plates, and the top and the bottom of the U-shaped plate body are fixedly connected with the top frame and the bottom plate respectively; the part of the second end plate, which is opposite to the auxiliary transformer and the resonant reactor, is recessed from inside to outside to form an external air channel part, and the first air outlet is formed on the bottom surface of the external air channel part;
The test method of the rail transit converter air cooling system comprises the following steps:
S1, assembling the test box, the wind shield, the radiator, the first fan, the auxiliary transformer and the resonant reactor, and correspondingly arranging a plurality of temperature sensors on the surfaces of the auxiliary transformer and the resonant reactor according to the number and position requirements of required temperature measuring points after the assembly is completed;
S2, after the first fan is started, supplying power to the auxiliary transformer and the resonant reactor, and setting the heating power of the auxiliary transformer and the resonant reactor as rated heating power;
s3, after the temperature values measured by the temperature sensors are stable, recording a time-dependent temperature change curve of each temperature measuring point, recording a temperature stable value of each temperature measuring point, and calculating a difference value between each temperature stable value and the ambient temperature to obtain surface temperature rise of each temperature measuring point;
S4, adjusting the fan rotating speed of the first fan, repeating the step S3, and comparing the time-dependent temperature change curve of each temperature measuring point under different fan rotating speeds with the temperature rise of each surface to judge the cooling capacity of the air cooling system under different fan rotating speeds.
2. The test method of the air cooling system of the rail transit converter is characterized in that a test device of the air cooling system of the rail transit converter is used for testing, and the test device of the air cooling system of the rail transit converter is a rectangular test box; the two sides of the test box are symmetrically provided with the total air inlets close to the first end of the test box, the positions, corresponding to the total air inlets, in the test box are provided with wind shields with through holes, the wind shields are enclosed with the test box to form wind guide cavities communicated with the corresponding total air inlets, and the positions, opposite to the total air inlets, of the two sides of the test box are fixedly provided with radiators; a first fan is arranged in a fan installation chamber formed between the two wind shields, an air inlet of the first fan is opposite to the corresponding through hole, and an air outlet of the first fan is arranged towards the second end of the test box; an auxiliary transformer and a resonance reactor which are arranged side by side along the width direction of the test box are arranged in the test box and close to the second end of the test box, and a first air outlet is formed in the bottom surface of the test box and close to the second end of the test box;
Dividing the ventilation surface of each radiator facing the outside of the test box into a plurality of areas, and arranging a wind speed sensor on each area; a fan baffle plate is arranged in the fan installation chamber along the width direction of the test chamber so as to divide the fan installation chamber into a first fan chamber and a second fan chamber which are mutually independent, wherein the second fan chamber is arranged close to the first end of the test chamber, and a second air outlet is formed in the bottom surface of the test chamber and at a position corresponding to the second fan chamber; two through holes are formed in each wind shield and are respectively communicated with the first fan chamber and the second fan chamber, the first fan is arranged in the first fan chamber, a second fan is arranged in the second fan chamber, an air inlet of the second fan is opposite to the corresponding through hole, and an air outlet of the second fan is opposite to the second air outlet;
A first mounting port is formed in the bottom surface of the test box and corresponds to the fan mounting chamber, and a first bottom door box cover is detachably fixed at the first mounting port; a second mounting port and a third mounting port are respectively formed in the bottom surface of the test box and correspond to the auxiliary transformer and the resonance reactor, and a second bottom door box cover and a third bottom door box cover are respectively detachably fixed at the second mounting port and the third mounting port; a heat insulation material layer is arranged on the inner surface of the top of the test box and corresponds to the auxiliary transformer and the resonant reactor, and the bottom surface of the heat insulation material layer can be abutted against the upper surfaces of the auxiliary transformer and the resonant reactor;
the test box comprises a top frame, a bottom plate, a top plate, a first end plate, a second end plate and two side plates, 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 two side plates are positioned at two sides of the test box; the main air inlet is formed in the corresponding side plate, and the radiator is fixedly connected with the corresponding side plate; the wind shield is a U-shaped plate body with an opening facing the corresponding total air inlet, two ends of the U-shaped plate body are fixedly connected with the corresponding side plates, and the top and the bottom of the U-shaped plate body are fixedly connected with the top frame and the bottom plate respectively; the part of the second end plate, which is opposite to the auxiliary transformer and the resonant reactor, is recessed from inside to outside to form an external air channel part, and the first air outlet is formed on the bottom surface of the external air channel part;
The test method of the rail transit converter air cooling system comprises the following steps:
S1, assembling the test box, the wind shield, the radiator, the first fan, the auxiliary transformer and the resonant reactor, dividing the assembled ventilation surface of each radiator facing the outside of the test box into a plurality of areas, and arranging a wind speed sensor on each area;
s2, starting the first fan;
S3, detecting the wind speed of the corresponding area through each wind speed sensor, calculating to obtain the average wind speed corresponding to the radiator according to the wind speed measured by each wind speed sensor corresponding to the radiator, and calculating to obtain the corresponding air quantity of the radiator according to the average wind speed and the ventilation surface area of the radiator.
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| CN202110365998.5A CN113109387B (en) | 2021-04-06 | 2021-04-06 | Rail transit converter air cooling system test device and test method |
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| CN113109387A (en) | 2021-07-13 |
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