CN113193702A - Dragging motor coupling cooling system and method - Google Patents
Dragging motor coupling cooling system and method Download PDFInfo
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- CN113193702A CN113193702A CN202110477771.XA CN202110477771A CN113193702A CN 113193702 A CN113193702 A CN 113193702A CN 202110477771 A CN202110477771 A CN 202110477771A CN 113193702 A CN113193702 A CN 113193702A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a dragging motor coupling cooling system and a dragging motor coupling cooling method, wherein the system comprises a dragging motor, a return air duct, a dry cooler pump station, a first cooling water return pipe, a dry cooler, a first cooling water supply pipe, an air-cooled water cooler, a second cooling water supply pipe, a second cooling water return pipe, an air conditioning air chamber, a water return pipeline and a water supply pipeline; the air-cooled water chiller comprises a water chiller water pump, a water chiller internal heat exchanger and a refrigerating system; the dragging motor comprises a motor and an air-air cooler, the motor is fixed on the ground, the air-air cooler is arranged on the motor, and the return air pipe is connected with the air-air cooler and the air conditioning air chamber; when the dry cooler is connected with the air-cooled water cooler in series, an air chamber circulating fan and a second air-water heat exchanger are arranged in the air conditioning air chamber; when the dry cooler is connected with the air-cooled water cooler in parallel, an air chamber circulating fan, a second air-water heat exchanger and a first air-water heat exchanger are arranged in the air conditioning air chamber. The cooling of the dragging motor of the wind driven generator can be effectively realized.
Description
Technical Field
The invention belongs to the technical field of cooling of wind generating sets, and particularly belongs to a system and a method for coupling and cooling a dragging motor.
Background
With the emergence of fossil energy crisis and environmental problems, the development and utilization of renewable energy are more and more emphasized by countries in the world, and especially, wind energy is taken as a clean and safe green energy and has important significance for the sustainable development of human society. With the increasing development of wind energy and the rapid development of offshore wind power, the increasing of the capacity of a single machine becomes the development trend of international wind power generation. The wind generating set is often in a remote and unattended area, so that high requirements are provided for stability, reliability and maintenance-free performance of the set, and the wind generating set becomes an important choice in the wind generating set in view of a series of advantages of the permanent-magnet direct-drive wind generating set.
Aiming at the continuously developed single machine capacity, in order to verify the reliability and stability of the heat dissipation system, the electrical system, the master control system, the mechanical structure and other designs of the whole machine, a corresponding dragging motor is required to output a certain torque to drag the tested machine set, the test of the whole performance of the tested unit is realized by simulating the power of the input shaft of the impeller, the continuous increase of the capacity of the tested unit correspondingly puts higher requirements on the capacity of the dragging motor, meanwhile, the capacity of the dragging motor is larger than the capacity of the tested machine in consideration of the motor efficiency and the transmission chain loss, so the loss of the dragging motor is correspondingly larger, and the heat dissipation effect of the dragging motor also becomes the constraint condition of the stable operation and the output torque capacity of the dragging motor, and only when a proper heat dissipation system is matched with the dragging motor, the loss generated in the running process of the dragging motor can be effectively taken away in time to ensure the output of enough torque, and the stable running of the unit is ensured. The cooling technology of the dragging motor of the wind turbine generator is different from the tested unit, is positioned on the ground, and does not need to consider a series of conditions faced by the tested unit in the last day, so that more cooling technologies and means are not restricted by the environmental conditions faced by the wind turbine generator of an actual wind field, and the cooling technology which is convenient to control and has higher efficiency can be fully applied to realize the cooling of the dragging motor.
In the prior art, the cooling form of the dragging motor is not much, and the traditional wind generating set mostly adopts an air cooling technology, an air-water cooling technology and an air-water-air cooling technology, but has use constraint on the application of the dragging motor with large capacity.
The technical features of CN101728896, CN105240222A, CN203251188U and EP2527650a2 in the prior patents are mostly established in the wind generating set of the real day, and the application of the dragging motor of the wind generating set is all restricted, and considering that the dragging motor is arranged on the ground, the cooling technology which is more beneficial is conditionally applied. For the dragging motor, on one hand, large loss of the dragging motor needs to be considered, and on the other hand, the environmental condition where the dragging motor is arranged needs to be considered, but for the existing wind driven generator cooling technology, a proper cooling mode of the dragging motor is not mentioned, and for the excessive loss, when a cold load is provided for heat dissipation, the energy consumption condition of a cooling system needs to be considered.
In summary, in the prior art, the cooling system for the traction motor cannot meet the cooling requirement of a large-scale wind generating set, and has the problems of large occupied space, easy formation of heat island effect, reduction of the efficiency of the cooling system, and poor energy-saving effect.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a dragging motor coupling cooling system and a dragging motor coupling cooling method, which can effectively realize the cooling of a dragging motor of a wind driven generator and simultaneously realize the energy saving of the system, the control of air cleanliness and the avoidance of a heat island effect.
In order to achieve the purpose, the invention provides the following technical scheme:
a dragging motor coupling cooling system comprises a dragging motor, a return air duct, a dry cooler pump station, a first cooling water return pipe, a dry cooler, a first cooling water supply pipe, an air-cooled type water cooler, a second cooling water supply pipe, a second cooling water return pipe, an air conditioning air chamber, a water return pipeline and a water supply pipeline; the air-cooled water chiller comprises a water chiller water pump, a water chiller internal heat exchanger and a refrigerating system;
the dragging motor comprises a motor and an air-air cooler, the motor is fixed on the ground, the air-air cooler is arranged on the motor, and the return air pipe is connected with the air-air cooler and the air conditioning air chamber;
when the dry cooler is connected with the air-cooled water cooler in series, an air chamber circulating fan and a second air-water heat exchanger are arranged in the air conditioning air chamber;
the second air-water heat exchanger is communicated with a dry cooler through a water return pipeline, the dry cooler is communicated with one end of a heat exchanger in a water cooler through a water pump of the water cooler, and the other end of the heat exchanger in the water cooler is communicated with the second air-water heat exchanger through a water supply pipeline;
when the dry cooler is connected with the air-cooled water cooler in parallel, an air chamber circulating fan, a second air-water heat exchanger and a first air-water heat exchanger are arranged in the air conditioning air chamber;
the first air-water heat exchanger is communicated with a dry cooler through a first cooling water return pipe, and a dry cooler pump station is arranged on the first cooling water return pipe; the dry cooler is communicated with the first air-water heat exchanger through a first cooling water supply pipe;
the second air-water heat exchanger is communicated with one end of a heat exchanger in the water chiller through a second cooling water return pipe, and a water chiller water pump is arranged on the second cooling water return pipe; and the other end of the heat exchanger in the water chilling unit is communicated with a second air-water heat exchanger through a second cooling water supply pipe.
Preferably, still include the test bench building, the driving motor, dry cold ware, air-cooled cold water machine and air-conditioning plenum all set up on the test bench building, be provided with the division wall on the test bench building, dry cold ware and air-cooled cold water machine set up the lateral surface at the division wall, driving motor and air-conditioning plenum set up the medial surface at the division wall, first cooling wet return, first cooling delivery pipe, second cooling wet return, wet return pipeline and supply line all pass the division wall.
Preferably, the first cooling water return pipe, the first cooling water supply pipe, the second cooling water return pipe, the water return pipeline and the water supply pipeline are all provided with temperature sensors;
and flow sensors are arranged on the first cooling water return pipe, the second cooling water return pipe and the water return pipe.
Preferably, an air filter is arranged in the air conditioning air chamber, and the air filter is arranged between the return air pipe and the second air-water heat exchanger or the first air-water heat exchanger.
Further, the air filter is fixed through an air filter U-shaped rail.
Preferably, the second air-water heat exchanger and the first air-water heat exchanger are both fixed through U-shaped rails of the air-water heat exchangers.
Preferably, the first cooling water return pipe, the first cooling water supply pipe, the second cooling water return pipe, the water return pipeline and the water supply pipeline are all provided with valves.
Preferably, filters are arranged at the upstream of the water chiller pump and the dry cooler pump station.
Preferably, the pipeline on the upstream and downstream of the dry cooler and the dry cooler pump station is provided with a pressure transmitter and a pressure gauge.
A coupling cooling method for a traction motor is based on any one of the above mentioned coupling cooling systems for the traction motor, comprising the following procedures,
when the dry cooler is connected with the air-cooled water cooler in series, hot air for driving the hollow-air cooler of the motor enters the air conditioning air chamber through the air return pipe, and the hot air is cooled through the second air-water heat exchanger under the action of the air chamber circulating fan;
the cooling liquid heated after heat exchange in the second air-water heat exchanger enters the water return pipeline under the action of the water pump of the water chiller, is primarily cooled by the dry cooler, then enters the heat exchanger in the water chiller to be secondarily cooled, and enters the air-water heat exchanger again under the action of the water pump of the water chiller, and then the hot air in the air-conditioning air chamber is cooled and heat exchanged again to form closed circulation;
when the dry cooler is connected with the air-cooled water cooler in parallel, hot air for driving the hollow-air cooler of the motor enters the air conditioning air chamber through the air return pipe, and the hot air is cooled by the first air-water heat exchanger and the second air-water heat exchanger in sequence under the action of the circulating fan of the air chamber;
the cooling liquid heated after heat exchange in the first air-water heat exchanger enters a first cooling water return pipe under the action of a dry cooler pump station and enters a dry cooler for cooling, the cooled cooling liquid enters a first water supply pipeline and enters the first air-water heat exchanger in the air conditioning air chamber again under the action of the dry cooler pump station, and the hot air in the air conditioning air chamber is cooled and heat exchanged again to form closed cycle;
and the cooling liquid which is heated after heat exchange in the air-cooling heat exchanger II enters the second water return pipe under the action of the water chilling unit pump and enters the water chilling unit inner heat exchanger of the air-cooling water chiller, and the cooling liquid which is cooled after heat exchange enters the second water supply pipeline under the action of the water chilling unit pump and enters the second air-water heat exchanger, and the hot air in the air conditioning air chamber is cooled and heat exchanged again to form closed cycle.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a traction motor coupling cooling system, which combines a dry cooler and an air-cooled water cooler for mechanical refrigeration, and cools a traction motor by combining the dry cooler and the mechanical refrigeration in a parallel or serial mode, can be dynamically adjusted according to different environmental climates, and realizes effective control of air temperature of a cooling system, thereby meeting the requirement of cooling capacity of the traction motor, intelligently adjusting cold load according to different output torques and passive section capacity, and realizing the effect of energy conservation; and the space occupation of a cooling system can be reduced, and the cleanliness of air entering the heat exchanger of the generator is effectively ensured by arranging the air chamber, so that the heat exchange effect of the air-air heat exchanger is prevented from being reduced.
Furthermore, the dry cooler and the air-cooled water cooler are arranged on the outer side of the test bed building through the test bed building, and the dragging motor and the air conditioning air chamber are arranged on the inner side of the test bed building, so that the conditions that the cooling effect of the dragging motor is poor and the efficiency of a cooling system is reduced due to the formation of a heat island effect in a test room or a factory building are avoided; the problems that the heat dissipation capacity of the dragging motor is insufficient due to overhigh local temperature and the like are solved, and meanwhile, the energy conservation of a cooling system can be realized.
Furthermore, through setting the flow sensor and the temperature sensor, the loss of the dragging motor can be calculated at different torque outputs and different capacities at any time, and the power of the cooling system can be conveniently controlled.
Furthermore, the hollow-water heat exchanger and the air filter in the air conditioning chamber are fixed through a groove-shaped steel structure, and can be conveniently maintained and replaced through drawing in the maintenance process.
The invention provides a coupling cooling method for a traction motor, which is characterized in that a dry cooler and mechanical refrigeration are combined to cool the traction motor in a parallel or serial connection mode, dynamic adjustment can be carried out according to different environmental climates, and effective control of the air temperature of a cooling system is realized, so that the requirement of the cooling capacity of the traction motor is met, on one hand, the opening of a large cavity of a factory building and the excessive occupation of an off-plant space are avoided, on the other hand, the formation of a heat island effect in the process of a traction test can be avoided, the problems of insufficient heat dissipation capacity of the traction motor and the like caused by excessive local temperature can be avoided, and on the other hand, the energy saving of the cooling system can be realized.
Drawings
FIG. 1 is a schematic view of a parallel coupled cooling system of a dry cooler and mechanical refrigeration in accordance with the present invention;
FIG. 2 is a schematic diagram of a dry cooler and mechanical refrigeration series coupled cooling system;
FIG. 3 is a schematic three-dimensional layout of a dry cooler and mechanical refrigeration parallel coupled cooling system;
FIG. 4 is a schematic three-dimensional layout of a dry cooler and mechanical refrigeration series coupled cooling system;
FIG. 5 is a three-dimensional schematic view of an air conditioning plenum under a condition of parallel connection of a dry cooler and mechanical refrigeration;
FIG. 6 is a three-dimensional schematic view of an air conditioning plenum under a working condition of a dry cooler and mechanical refrigeration in series;
in the drawings: 1. building a test bed; 2. a dragging motor, a 2.1 motor and a 2.2 air-air cooler; 3, an air return duct; 4. a pressure transmitter; 5. a dry chiller pump station; 6. a pressure gauge; 7. a first cooling water return pipe; 8. a filter; 9. a valve; 10. a temperature sensor; 11. a dry cooler; 12. a flow sensor; 13. a first cooling water supply pipe; 14. the air-cooled water chiller comprises an air-cooled water chiller, a 14.1 water chiller water pump and a 14.2 internal heat exchanger of the water chiller; 15. a second cooling water supply pipe; 16. a second cooling water return pipe; 17. the air conditioner air chamber comprises an air conditioning air chamber, a 17.1 air chamber circulating fan, a 17.2 second air-water heat exchanger, a 17.3 first air-water heat exchanger, a 17.4 filter, a 17.5 fan maintenance cover plate, a 17.6 air chamber air return opening structure, a 17.7 air chamber box body, a 17.8 air-water heat exchanger U-shaped rail and a 17.9 air filter U-shaped rail; 18. a water return pipeline; 19. a water supply pipeline.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention discloses a traction motor coupling cooling system which comprises a test bed building 1, a traction motor 2, a return air pipe 3, a pressure transmitter 4, a dry cooler pump station 5, a pressure gauge 6, a first cooling water return pipe 7, a filter 8, a valve 9, a temperature sensor 10, a dry cooler 11, a flow sensor 12, a first cooling water supply pipe 13, an air-cooled water cooler 14, a second cooling water supply pipe 15, a second cooling water return pipe 16, an air conditioning air chamber 17, a water return pipeline 18 and a water supply pipeline 19.
The dragging motor 2 comprises a motor 2.1 and an air-air cooler 2.2, the air-cooled water chiller 14 comprises a water chiller water pump 14.1 and a water chiller internal heat exchanger 14.2, and the dragging motor 2 is obliquely arranged relative to the bottom surface.
The air conditioning plenum 17 comprises a plenum circulating fan 17.1, a second air-water heat exchanger 17.2, a first air-water heat exchanger 17.3, an air filter 17.4, a fan maintenance cover plate 17.5, a plenum return air inlet structure 17.6, a plenum box 17.7, an air-water heat exchanger U-shaped rail 17.8 and an air filter U-shaped rail 17.9.
As shown in fig. 1, the dragging motor 2 comprises a motor 2.1 and an air-air cooler 2.2, the motor 2.1 is fixed on the ground, the air-air cooler 2.2 is arranged on the motor 2.1, and the return air duct 3 is connected with the air-air cooler 2.2 and the air conditioning air chamber 17; when the dry cooler 11 is connected with the air-cooled water chiller 14 in parallel, an air-conditioning air chamber 17 is internally provided with an air chamber circulating fan 17.1, a second air-water heat exchanger 17.2 and a first air-water heat exchanger 17.3.
The first air-water heat exchanger 17.3 is communicated with a dry cooler 11 through a first cooling water return pipe 7, and a dry cooler pump station 5 is arranged on the first cooling water return pipe 7; the dry cooler 11 is communicated with a first air-water heat exchanger 17.3 through a first cooling water supply pipe 13.
The second air-water heat exchanger 17.2 is communicated with one end of a heat exchanger 14.2 in the water chiller through a second cooling water return pipe 16, and a water chiller water pump 14.1 is arranged on the second cooling water return pipe 16; the other end of the heat exchanger 14.2 in the water chilling unit is communicated with a second air-water heat exchanger 17.2 through a second cooling water supply pipe 15.
As shown in fig. 1, the dry cooler 11 and the mechanical refrigeration are connected in parallel, the driving motor 2 includes a motor 2.1 and an air-air cooler 2.2, the air-air cooler 2.2 is composed of an internal circulation and an external circulation, wherein the internal circulation is a closed circulation of air in the driving motor 2; the coupling cooling system of the invention is concentrated on external circulation, under the action of the air chamber circulating fan 17.1, the external circulation hot air after heat exchange enters the air conditioning air chamber 17 through the air return air pipe 3, firstly the cleanliness control of the air is realized through the air filter 17.4, according to the difference of air quality, the air filter 17.4 can be arranged by one-stage filtration or multi-stage filtration, the filtered air passes through the first air-water heat exchanger 17.3 and the second air-water heat exchanger 17.2 in sequence under the action of the air chamber circulating fan 17.1 to respectively realize the cooling of high-temperature air, wherein the second air-water heat exchanger 17.2 and the first air-water heat exchanger 17.3 provide different load capacity according to the difference of torque output and the difference of environmental temperature working conditions, and the cooled air is discharged into a test room or a factory building again under the action of the air chamber circulating fan 17.1 and enters into the external circulation inlet of the air-air cooler 2.2 again.
The cooling liquid which completes heat exchange in the first air-water heat exchanger 17.3 enters the first cooling water return pipe 7 under the action of the dry cooler pump station 5 and enters the dry cooler 11, the cooled cooling liquid enters the first water supply pipeline 13, the dry cooler pump station 5 enters the first air-water heat exchanger 17.3 of the air conditioning air chamber 17 again under the action of the dry cooler pump station 5, thereby forming a closed loop circulation, wherein valves 9 are arranged in front of and behind the dry cooler pump station 11 and the dry cooler pump station 5, so that the pipeline is convenient to cut off when system components and sensors are replaced or maintained, a filter 8 is arranged in front of the dry cooler pump station 5, thereby ensuring the cleanliness of the cooling liquid, avoiding the damage of the dry cooler pump station 5 and the blockage of the dry cooler 11, meanwhile, a flow sensor 12 is arranged on the first water return pipe 7, and temperature sensors 10 are arranged in front of and behind the dry cooler 11, thereby accurately calculating the heat dissipation capacity of the system where the dry cooler 11 is located, thereby set up pressure transmitter 4 around the cold ware pump station 5 of doing in this system and can effectively monitor and do cold ware pump station 5 running state and pressure variation, be provided with pressure transmitter 4 around the cold ware 11 of doing simultaneously (the pressure transmitter sharing behind 5 with the cold ware pump station of doing before the entry) to the 11 resistance variation circumstances of monitoring doing the cold ware, simultaneously, set up manometer 6 in the system, the local observation to system pressure and the observation of annotating the local pressure value of flowing back in-process of the on-the-spot local of being convenient for.
The cooling liquid which completes heat exchange in the air-cooling heat exchanger II 17.2 enters the second water return pipe 16 under the action of the water chilling unit pump 14.1 and enters the water chilling unit inner heat exchanger 14.2 of the air-cooling water chilling unit 14, the water chilling unit inner heat exchanger 14.2 can be a plate heat exchanger or a shell and tube heat exchanger, the air conditioning air chamber 17 completes heat exchange with the refrigerant in the air-cooling water chilling unit 14, the cooling liquid which completes heat exchange and is cooled enters the second water supply pipeline 15 under the action of the water chilling unit pump 14.1 and enters the second water supply pipeline 15 again and enters the second air-water heat exchanger 17.2 again, and therefore closed circulation is formed; a flow sensor 12 is arranged on a second water return pipeline 16, temperature sensors 10 are arranged in the front and at the back of a heat exchanger 14.2 in the water chilling unit, so that the heat exchange quantity of a system where the air-cooled water chilling unit 14 is located can be effectively calculated, meanwhile, valves 9 are arranged in the front and at the back of a key component, so that replacement and maintenance of the sensors and the key component are facilitated, similarly, pressure transmitters 4 are arranged in the front and at the back of a water chilling unit pump station 14.1 and the heat exchanger 14.2 in the water chilling unit, so that the system operation pressure is conveniently monitored, and a pressure gauge 6 is arranged on the system, so that local pressure monitoring and observation are facilitated.
The two systems can complement each other due to the change and difference of the environmental temperature, specifically, under the condition of lower environmental temperature or lower output torque, only the cooling system where the dry cooler 11 is located operates, and the control of the cooling load can be further realized through the frequency conversion or high-low speed regulation function of the circulating fan of the dry cooler 11, when the environmental temperature is too high or the output value of the torque is large, and the loss of the dragging motor 2 is large, the system where the air-cooled water chilling unit 14 is located operates, the system operates, and the operation load of the system is realized through the frequency modulation mechanism of the air-cooled water chilling unit 14; the influence of the torque of the environment temperature machine is finally reflected in the control of the temperature of the winding of the dragging motor 2 in a centralized way, and the value is used as a final target control value and a feedback value to control the capacity of the two cooling systems; the frequency modulation or high-low speed frequency modulation logic mechanism of the circulating fan of the dry cooler 11, the air chamber circulating fan 17.1 and the air-air cooler 2.2 can be synchronously controlled and adjusted according to the winding temperature for the convenience of simplification.
As shown in fig. 2, the driving motor 2 comprises a motor 2.1 and an air-air cooler 2.2, the motor 2.1 is fixed on the ground, the air-air cooler 2.2 is arranged on the motor 2.1, and the return air duct 3 is connected with the air-air cooler 2.2 and the air conditioning air chamber 17.
When the dry cooler 11 is connected with the air-cooled water chiller 14 in series, an air-conditioning air chamber 17 is internally provided with an air chamber circulating fan 17.1 and a second air-water heat exchanger 17.2.
The second air-water heat exchanger 17.2 is communicated with the dry cooler 11 through a water return pipeline 18, the dry cooler 11 is communicated with one end of the heat exchanger 14.2 in the water cooler through a water pump 14.1 of the water cooler, and the other end of the heat exchanger 14.2 in the water cooler is communicated with the second air-water heat exchanger 17.2 through a water supply pipeline 19.
Figure 2 is a schematic diagram of a cooling system in which a dry cooler and mechanical refrigeration are coupled in series, the dry cooler 11 and mechanical refrigeration being in series, the system circulating inside the test stand building 1 being similar to that described in figure one, except that only one air-water heat exchanger 17.2 is retained in the air conditioning plenum 17.
The cooling liquid heated after heat exchange in the air-water heat exchanger 17.2 enters the water return pipeline 18 under the action of the water chiller water pump 14.1, and is firstly cooled for the first time through the dry cooler 11, then enters the water chiller heat exchanger 14.2 for secondary cooling, and enters the air-water heat exchanger 17.2 again under the action of the water chiller water pump 14.1 to exchange heat in the air conditioning chamber 17 again, so that a closed cycle is formed, wherein the temperature sensor 10, the flow sensor 12, the pressure transmitter 4, the pressure gauge 6 and the valve 9 arranged in the system have the same functions as those described in the figure I.
In the series system, only a water chiller water pump 14.1 is used as a power source of a water system, the operation of an air-cooled water chiller 14, namely the heat exchange performance of a heat exchanger 14.2 in the water chiller, is controlled according to the control feedback temperature of a winding under the working condition of low-temperature environment or under the condition of low torque input, when the heat dissipation demand of a dragging motor 2 is low, the heat dissipation demand of the system is met only by the operation of a dry cooler 11, and according to the continuous rise of load, the air-cooled water chiller 14 starts to operate to realize secondary cooling and carries out frequency modulation control according to load change; in the case of low output torque of the driving motor 2 or low ambient temperature (without the operation of the air-cooled chiller unit 14), further energy saving of the cooling system can be realized by the frequency modulation or high-low speed frequency modulation logic mechanism of the circulating fan of the dry cooler 11, the air chamber circulating fan 17.1 and the air-air cooler 2.2.
Fig. 3 is a schematic diagram of a three-dimensional layout of a dry cooler and mechanical refrigeration parallel coupling cooling system, which is the same as the principle of fig. 1, wherein a dragging motor 2, a return air duct 3, an air conditioning plenum 17 and the like are arranged in a test bed building 1, a dry cooler 11 and an air cooling water chilling unit 14 are arranged outside the test bed building 1, and a dry cooler pump station can be arranged in or outside the test bed building 1, so that the test bed building 1 can be ensured to be opened only by opening a water system pipeline, the structural layout can effectively avoid the formation of air short circuit and heat island effect of each heat exchange structure, and the reduction of the cooling effect is avoided.
Fig. 4 is a schematic three-dimensional layout of a dry cooler and mechanical refrigeration series coupling cooling system, which has the same principle as fig. 2 and is arranged at a position similar to fig. 3, wherein a water pump 14.1 of a water cooler in an air-water cooling unit 14 is used as a power source of a water system, a pump station is not separately arranged on a dry cooler 11, the cooling system is a one-way system, and correspondingly, air-water heat exchangers in an air conditioning room 17 are correspondingly reduced into one group.
FIG. 5 is a three-dimensional schematic view of an air-conditioning plenum under the working condition of parallel connection of a dry cooler and mechanical refrigeration, the air-conditioning plenum 17 mainly comprises a plenum circulating fan 17.1, a second air-water heat exchanger 17.2, a first air-water heat exchanger 17.3, an air filter 17.4, a fan maintenance cover plate 17.5, a plenum return air inlet structure 17.6, a plenum box body 17.7, an air-water heat exchanger U-shaped rail 17.8, an air filter U-shaped rail 17.9 and the like, hot air from an air-air cooler 2.2 on a dragging motor 2 enters the air-conditioning plenum 17 through a return air pipe 3, wherein the return air pipe 3 is connected with the plenum return air inlet structure 17.6, the air filter 17.4, the second air-water heat exchanger 17.2, the first air-water heat exchanger 17.3 and the plenum circulating fan 17.1 are respectively arranged in the plenum box body 17.7, wherein the air filter 17.4 is provided with a pulling handle and fixed in the air filter U-shaped rail 17.9, the second air-water heat exchanger 17.2 and the first air-water heat exchanger 17.3 are fixed by the U-shaped rail 17.8 of the air-water heat exchanger, so that the later replacement and maintenance are facilitated; the air chamber circulating fan 17.1 is provided with a fan maintenance cover plate 17.5, so that the fan can be conveniently replaced and maintained under the condition of fan failure.
Fig. 6 is a three-dimensional schematic diagram of an air conditioning plenum under the working condition of series connection of a dry cooler and mechanical refrigeration, the structural principle of the air conditioning plenum is the same as that of fig. 5, and the difference is that a cooling system is adopted in a series connection mode, and an air-water heat exchanger of the cooling system is correspondingly reduced.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A coupling cooling system of a dragging motor is characterized by comprising the dragging motor (2), a return air duct (3), a dry cooler pump station (5), a first cooling water return pipe (7), a dry cooler (11), a first cooling water supply pipe (13), an air-cooled type water cooler (14), a second cooling water supply pipe (15), a second cooling water return pipe (16), an air conditioning air chamber (17), a water return pipeline (18) and a water supply pipeline (19); the air-cooled water chiller (14) comprises a water chiller water pump (14.1) and a water chiller internal heat exchanger (14.2);
the dragging motor (2) comprises a motor (2.1) and an air-air cooler (2.2), the motor (2.1) is fixed on the ground, the air-air cooler (2.2) is arranged on the motor (2.1), and the return air pipe (3) is connected with the air-air cooler (2.2) and the air conditioning air chamber (17);
when the dry cooler (11) is connected with the air-cooled water chiller (14) in series, an air chamber circulating fan (17.1) and a second air-water heat exchanger (17.2) are arranged in the air conditioning air chamber (17);
the second air-water heat exchanger (17.2) is communicated with the dry cooler (11) through a water return pipeline (18), the dry cooler (11) is communicated with one end of the heat exchanger (14.2) in the water chiller through a water chiller water pump (14.1), and the other end of the heat exchanger (14.2) in the water chiller is communicated with the second air-water heat exchanger (17.2) through a water supply pipeline (19);
when the dry cooler (11) is connected with the air-cooled water chiller (14) in parallel, an air chamber circulating fan (17.1), a second air-water heat exchanger (17.2) and a first air-water heat exchanger (17.3) are arranged in the air conditioning air chamber (17);
the first air-water heat exchanger (17.3) is communicated with a dry cooler (11) through a first cooling water return pipe (7), and a dry cooler pump station (5) is arranged on the first cooling water return pipe (7); the dry cooler (11) is communicated with a first air-water heat exchanger (17.3) through a first cooling water supply pipe (13);
the second air-water heat exchanger (17.2) is communicated with one end of a heat exchanger (14.2) in the water chiller through a second cooling water return pipe (16), and a water chiller water pump (14.1) is arranged on the second cooling water return pipe (16); the other end of the heat exchanger (14.2) in the water chilling machine is communicated with a second air-water heat exchanger (17.2) through a second cooling water supply pipe (15).
2. The coupling cooling system of the traction motor as claimed in claim 1, further comprising a test bed building (1), wherein the traction motor (2), the dry cooler (11), the air-cooled water chiller (14) and the air conditioning air chamber (17) are all disposed on the test bed building (1), a partition wall is disposed on the test bed building (1), the dry cooler (11) and the air-cooled water chiller (14) are disposed on the outer side of the partition wall, the traction motor (2) and the air conditioning air chamber (17) are disposed on the inner side of the partition wall, and the first cooling water return pipe (7), the first cooling water supply pipe (13), the second cooling water supply pipe (15), the second cooling water return pipe (16), the water return pipe (18) and the water supply pipe (19) all pass through the partition wall.
3. A traction motor coupled cooling system as claimed in claim 1, wherein said first cooling water return pipe (7), said first cooling water supply pipe (13), said second cooling water supply pipe (15), said second cooling water return pipe (16), said water return line (18) and said water supply line (19) are provided with temperature sensors (10);
and flow sensors (12) are arranged on the first cooling water return pipe (7), the second cooling water return pipe (16) and the water return pipeline (18).
4. A traction motor coupled cooling system according to claim 1, wherein an air filter (17.4) is arranged inside the air conditioning plenum (17), and the air filter (17.4) is arranged between the return air duct (3) and the second air-water heat exchanger (17.2) or the first air-water heat exchanger (17.3).
5. A traction motor coupled cooling system according to claim 4, wherein said air filter (17.4) is fixed by means of an air filter U-shaped rail (17.9).
6. A traction motor coupled cooling system according to claim 1, characterized in that said second air-water heat exchanger (17.2) and said first air-water heat exchanger (17.3) are fixed by means of an air-water heat exchanger U-shaped rail (17.8).
7. A traction motor coupled cooling system according to claim 1, wherein said first cooling water return pipe (7), said first cooling water supply pipe (13), said second cooling water supply pipe (15), said second cooling water return pipe (16), said water return line (18) and said water supply line (19) are provided with valves (9).
8. A traction motor coupled cooling system according to claim 1, characterized in that filters (8) are provided upstream of the chiller water pump (14.1) and the dry cooler pump station (5).
9. A traction motor coupled cooling system as claimed in claim 1, wherein the dry cooler (11) and the dry cooler pump station (5) are provided with a pressure transmitter (4) and a pressure gauge (6) on the upstream and downstream pipelines.
10. A traction motor coupling cooling method, characterized in that, a traction motor coupling cooling system based on any one of claims 1-9, comprises the following procedures,
when the dry cooler (11) is connected with the air-cooled water chiller (14) in series, hot air of the hollow-air cooler (2.2) of the driving motor (2) enters an air conditioning air chamber (17) through a return air duct (3), and the hot air is cooled through a second air-water heat exchanger (17.2) under the action of an air chamber circulating fan (17.1);
the cooling liquid heated after heat exchange in the second air-water heat exchanger (17.2) enters a water return pipeline (18) under the action of a water cooler water pump (14.1), is subjected to primary cooling through a dry cooler (11), then enters the water cooler heat exchanger (14.2) for secondary cooling, enters the air-water heat exchanger (17.2) again under the action of the water cooler water pump (14.1), and is subjected to cooling heat exchange on the hot air in the air conditioning chamber (17) again to form closed circulation;
when the dry cooler (11) is connected with the air-cooled water chiller (14) in parallel, hot air of the hollow-air cooler (2.2) of the driving motor (2) enters an air conditioning air chamber (17) through a return air duct (3), and the hot air is cooled by a first air-water heat exchanger (17.3) and a second air-water heat exchanger (17.2) in sequence under the action of an air chamber circulating fan (17.1);
the cooling liquid heated after heat exchange in the first air-water heat exchanger (17.3) enters the first cooling water return pipe (7) under the action of the dry cooler pump station (5) and enters the dry cooler (11) for cooling, the cooled cooling liquid enters the first water supply pipeline (13), enters the first air-water heat exchanger (17.3) in the air conditioning air chamber (17) again under the action of the dry cooler pump station (5), and is cooled and heat exchanged for the hot air in the air conditioning air chamber (17) again to form closed circulation;
the cooling liquid which is heated after heat exchange in the second air-cold heat exchanger (17.2) enters the second water return pipe (16) under the action of the water chiller pump (14.1) and enters the water chiller heat exchanger (14.2) of the air-cooled water chiller (14), the cooling liquid which is cooled after heat exchange enters the second water supply pipeline (15) under the action of the water chiller pump (14.1) and enters the second air-water heat exchanger (17.2), and the hot air in the air conditioning chamber (17) is cooled and heat exchanged again to form closed cycle.
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