CN211400848U - High-power cooling tower of fast power concentrated motor train unit - Google Patents
High-power cooling tower of fast power concentrated motor train unit Download PDFInfo
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- CN211400848U CN211400848U CN201922381372.4U CN201922381372U CN211400848U CN 211400848 U CN211400848 U CN 211400848U CN 201922381372 U CN201922381372 U CN 201922381372U CN 211400848 U CN211400848 U CN 211400848U
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Abstract
The utility model provides a high-power cooling tower of a fast power concentrated motor train unit, which comprises a top cover, a frame, a cooling fan, a heat exchanger, a base, a shield pump, an expansion water tank, an oil pipeline, a water pipeline, a relay and an online detection device, wherein the top cover, the frame, the heat exchanger and the base sequentially form an air cooling channel of the cooling tower from top to bottom; the cooling fan is arranged in the rack, and the shielding pump, the expansion water tank and the relay are arranged on the side wall of the rack; the water inlet cavity of the heat exchanger is connected with the water outlet pipe of the traction converter, the water outlet cavity of the heat exchanger is connected with the water inlet pipe of the shielding pump, the water outlet pipe of the shielding pump is connected with the water inlet pipe of the traction converter, and the oil pipeline is connected with the traction transformer. The cooling tower is simple in structure, light in weight, convenient to maintain, low in noise and intelligent, and can synchronously cool the traction converter and the traction transformer.
Description
Technical Field
The utility model relates to a cooling device technical field for the vehicle especially relates to a high-power cooling tower of quick power concentrated EMUs.
Background
With the rapid development of domestic rail transit, particularly, extremely high requirements are provided for the integration and reliability of a centralized power motor train unit, wherein the requirements for the performance and reliability of a traction converter and a traction transformer are included, and a cooling tower is a main device for cooling the traction converter and the traction transformer of the motor train unit. The concentrated power motor train unit has the advantages that the structure is more compact, the structural design requirement is higher, and the problems that the structure is complex, the auxiliary structures are multiple, the space utilization rate is low, the installation and the disassembly are inconvenient, the noise is high, the running state of a part cannot be monitored at any time, the system fault is effectively prevented, the maintenance cost is high and the like still exist in the design of the cooling tower designed at home and abroad at present.
Therefore, a novel technology for a high-power cooling tower of a fast power-concentrated motor train unit is urgently needed in the industry.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to above-mentioned problem, guaranteeing to draw under converter and the stable prerequisite of traction transformer operational environment temperature, provide a simple structure, the quality is light, easy maintenance, sealing performance is good, low in manufacturing cost, the noise is low, and intelligent quick power concentrates the high-power cooling tower of EMUs, can realize the synchronous cooling to drawing converter and traction transformer simultaneously.
In order to achieve the purpose, the utility model provides a high-power cooling tower of a fast power concentrated motor train unit, the cooling tower is used for the cooling of traction transformer and traction converter, the cooling tower comprises a top cover, a frame, a cooling fan, a heat exchanger, a base, a shielding pump, an expansion water tank, an oil pipeline, a water pipeline, a relay and an online detection device, the top cover, the frame, the heat exchanger and the base sequentially form an air cooling channel of the cooling tower from top to bottom, and the top cover, the frame, the heat exchanger and the base are connected through fasteners; the cooling fan is arranged in the rack, and the shielding pump, the expansion water tank and the relay are arranged on the side wall of the rack;
the water inlet cavity of the heat exchanger is connected with the water outlet pipe of the traction converter, the water outlet cavity of the heat exchanger is connected with the water inlet pipe of the shield pump, the water outlet pipe of the shield pump is connected with the water inlet pipe of the traction converter, and the oil pipeline is connected with the traction transformer;
the on-line detection device comprises a control module, a signal acquisition module and a signal processing module, wherein the signal acquisition module is arranged on the cooling fan.
Furthermore, the signal acquisition module comprises a wind speed and direction sensor, a vibration speed sensor and a bearing temperature sensor; the wind speed and direction sensor is located at an air inlet of the cooling fan, the vibration speed sensor is located at the bottom of a motor of the cooling fan, and the bearing temperature sensor is located on a bearing of the motor of the cooling fan.
Further, the frame is integrally welded by adopting aluminum alloy; the frame and the auxiliary oil tank are welded into an integral framework structure.
Furthermore, the number of the cooling fans is two, and the cooling fans are double-speed axial flow fans; the frame is a frame with double wind channels.
Furthermore, the heat exchanger is a microwave type heat exchanger which is of an aluminum alloy fin structure, and the core body of the microwave type heat exchanger is subjected to integral electrophoresis treatment.
Furthermore, the expansion water tank comprises an upper cavity and a lower cavity, and the upper cavity is connected with the lower cavity through a water pipe; the lower cavity is provided with a water level display instrument and a water level detection switch.
Further, the top of the expansion water tank is also provided with a two-way pressure valve; the expansion water tank is made of aluminum alloy.
Furthermore, a water inlet and a water outlet of the canned motor pump are respectively connected with the heat exchanger and the traction converter through metal corrugated hoses.
Furthermore, the base is formed by integrally welding stainless steel.
Furthermore, a visual maintenance door is arranged on the rack and is installed on the front face of the rack through bolts.
The utility model discloses following beneficial effect has:
1. the utility model provides a high-power cooling tower of EMUs is concentrated to quick power mainly is applicable to the power and concentrates the type vehicle, because power concentration type vehicle width harmony series vehicle reduces 11%, and power more in the past harmony series vehicle that power is the biggest increases 50% simultaneously, for satisfying the heat dissipation power requirement, the heat exchanger adopts the high-efficient heat exchanger of microwave type, and the cooling tower adopts two axial fan to carry out the synchro-cooling. The device has simple structure and small occupied space and is arranged into double air channels by considering the influence of mutual absorption and intercommunication generated when two fans work simultaneously or a single fan works. Under the premise of ensuring the stable temperature of the working environment of the traction converter and the traction transformer, the cooling tower has the advantages of simple structure, light weight, convenient maintenance, good sealing performance, low manufacturing cost, low noise and intellectualization, and can synchronously cool the traction converter and the traction transformer.
2. The utility model provides a high-power cooling tower of a fast power concentrated motor train unit, which adopts a microwave type high-efficiency heat exchanger, wherein the microwave type high-efficiency heat exchanger adopts full aluminum alloy fins, so that the area of the wind fins is increased under the condition of reducing the wind resistance of the system, and the heat exchange efficiency can be improved; meanwhile, in order to improve the corrosion resistance of the heat exchanger, the core body of the heat exchanger is subjected to integral electrophoresis treatment, so that the corrosion resistance is greatly improved.
3. The utility model provides a high-power cooling tower of a fast power concentrated motor train unit, an expansion water tank is made of aluminum alloy materials, the structure of the expansion water tank is divided into an upper cavity and a lower cavity, an upper cavity is filled with cooling liquid, and a system water replenishing and exhausting pipeline is connected with the upper cavity; the lower cavity is connected with the upper cavity through a water pipe, and the structure of the lower cavity ensures that the upper cavity is in a full-filling state when the lower cavity is filled with cooling liquid; the lower cavity is provided with a water level display instrument and two water level detection switches, so that the alarm can be given in time once the lower cavity is lack of water. Meanwhile, a bidirectional pressure valve is arranged at the top of the water tank to ensure that the normal pressure range is maintained in the tank body. When the system pressure is greater than the upper limit value, the pressure valve is opened to realize outward exhaust; when the system pressure is smaller than the lower limit value, the pressure valve is opened to suck air outwards so as to realize the pressure balance of the system.
4. The utility model provides a high-power cooling tower of a fast power concentrated motor train unit, which adopts a low-noise canned motor pump, the canned motor pump is installed on the left side of the cooling tower, and a water inlet and a water outlet of the canned motor pump are respectively connected with a heat exchanger and a traction converter through corrugated metal hoses, so that on one hand, the manufacturing precision of a pipeline and the canned motor pump can be effectively reduced, and the free adjustment can be realized through the corrugated metal hoses; on the other hand, the influence on the structure due to the vibration of the shield pump can be reduced, and the service life of the product is prolonged. In addition, the adoption of the canned motor pump effectively reduces the system noise and can provide higher reliability.
5. The utility model provides a high-power cooling tower of EMUs is concentrated to quick power, the amount of wind through the on-line monitoring device inspection cooling blower import, can be effectual this cooling blower's of judgement operational aspect, if take place data abnormity, can in time preserve data, send order to driver's cabin and remote monitoring database, engineering technical personnel can carry out the analysis to data the very first time and obtain the reason that causes unusually, in time avoid causing the breakage because cooling blower's trouble. Through monitoring the temperature of bearing and the vibration speed of motor around the motor, can monitor the operating condition of motor bearing often, discovery problem before the bearing appears unusually, if take place the temperature out of tolerance or motor vibration speed is too big, vehicle monitoring system can obtain this information the very first time, can send back remote monitoring database with unusual information the very first time through detecting system, is favorable to engineering technical staff to carry out unusual information analysis, in time provides solution.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural view of a high-power cooling tower of a fast power concentrated motor train unit according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of a double-air-channel rack of a high-power cooling tower of a fast power-concentrated motor train unit according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of the online monitoring device of the high-power cooling tower of the fast power concentrated motor train unit according to the preferred embodiment of the present invention;
FIG. 4 is a schematic view of the installation of a cooling fan sensor of a high-power cooling tower of a fast power concentrated motor train unit according to a preferred embodiment of the present invention;
the device comprises a heat exchanger 1, a heat exchanger 2, a rack 3, a cooling fan 5, an expansion water tank 6, a shielding pump 7, a relay 8, a metal corrugated hose 9, a base 10, a top cover 11, a top cover adjusting gasket 12, a visual maintenance door 13, a signal acquisition module 14, a temperature sensor I, a temperature sensor II, a vibration speed sensor 16 and a vibration speed sensor.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1 to 4, the high-power cooling tower of the fast power-concentrated motor train unit comprises a top cover 10, a rack 2, a cooling fan 3, a heat exchanger 1, a base 9, a shield pump 6, an expansion water tank 5, a water pipeline, a relay 7 and an online detection device, wherein the top cover 10, the rack 2, the heat exchanger 1 and the base 9 sequentially form an external channel of the cooling tower from top to bottom, and the top cover 10, the rack 2, the heat exchanger 1 and the base 9 are connected through fasteners; the cooling fan 3 is arranged inside the frame 2, and the shielding pump 6, the expansion water tank 5 and the relay 7 are arranged on the side wall of the frame 2;
the water inlet cavity of the heat exchanger 1 is connected with the water outlet pipe of the traction converter, the water outlet cavity of the heat exchanger 1 is connected with the water inlet pipe of the shielding pump 6, the water outlet pipe of the shielding pump 6 is connected with the water inlet pipe of the traction converter, and the oil pipeline is connected with the traction transformer. And a water inlet pipe of the expansion water tank 5 is connected with a water outlet pipe of the traction converter, and a water outlet pipe of the expansion water tank 5 is connected with a water inlet pipe of the traction converter.
The frame 2 is formed by welding aluminum alloy, and the frame 2 and the auxiliary oil tank are welded into an integral framework structure. And an oil inlet pipe and an oil outlet pipe of the auxiliary oil tank are connected with the relay 7. Preferably, the relay 7 is a buchholz relay. The top cover 10 is provided with a top cover adjusting washer 11.
Because the width of the power concentration type vehicle is reduced by 11% compared with the harmonious series vehicle, and meanwhile, the power is increased by 50% compared with the harmonious series vehicle with the maximum power in the past, in order to meet the requirement of heat dissipation power, the heat exchanger 1 adopts the microwave type efficient heat exchanger 1, and the cooling tower adopts the double fans for synchronous cooling. Therefore, in the structural design process of the cooling tower, the influence of mutual absorption and intercommunication generated when two fans work simultaneously or a single fan works and the resistance brought to the fans by the structure of the frame 2 need to be fully considered while the structural strength is considered; the structure is subjected to simulation analysis by a finite element analysis method, and vibration impact test verification is carried out on a real object according to the international standard IEC 61373.
The number of the cooling fans 3 is two. The double-air-channel air conditioner has the advantages that the influence of mutual suction and intercommunication generated when two fans work simultaneously or a single fan works is considered, the structure is simple, the occupied space is small, double air channels are arranged, and the machine frame is a double-air-channel machine frame. The specific structure of the dual wind channel frame 2 is shown in fig. 2.
In a specific embodiment, a cooling fan 3 in the cooling tower adopts a double-speed high-efficiency low-noise axial flow fan, the axial flow fan adopts a double-speed motor and can be switched into a low-speed running state when a motor train unit enters a station, and the fan performance ensures the low-performance cooling requirement of a water cooling device and simultaneously extremely reduces the noise pollution; meanwhile, the cooling tower adopts a double-axial-flow fan scheme, two fans are controlled by an independent power supply, if one fan fails, the motor train unit can close the power supply of the fan, the power is reduced, the motor train unit runs to a transfer point for timely maintenance, and the risk that a passenger gets off the motor train unit due to the fact that the motor train unit breaks down due to the failure of the fan can be avoided.
In a specific embodiment, the cooling tower adopts a microwave type efficient heat exchanger 1, the microwave type efficient heat exchanger 1 adopts full aluminum alloy fins, and under the condition of reducing the wind resistance of a system, the area of the wind fins is increased, so that the heat exchange efficiency can be improved; meanwhile, in order to improve the corrosion resistance of the heat exchanger, the core body of the heat exchanger is subjected to integral electrophoresis treatment, so that the corrosion resistance is greatly improved.
In a specific embodiment, the expansion water tank 5 of the cooling tower is made of an all-aluminum alloy material, the expansion water tank 5 is structurally divided into an upper cavity and a lower cavity, the upper cavity is filled with cooling liquid, and a system water replenishing and exhausting pipeline is connected with the upper cavity; the lower cavity is connected with the upper cavity through a water pipe, and the structure of the lower cavity ensures that the upper cavity is in a full-filling state when the lower cavity is filled with cooling liquid; the lower cavity is provided with a water level display instrument and two water level detection switches, so that the alarm can be given in time once the lower cavity is lack of water. Meanwhile, a bidirectional pressure valve is arranged at the top of the water tank to ensure that the normal pressure range is maintained in the tank body. When the system pressure is greater than the upper limit value, the pressure valve is opened to realize outward exhaust; when the system pressure is smaller than the lower limit value, the pressure valve is opened to suck air outwards so as to realize the pressure balance of the system.
In a specific embodiment, the cooling tower adopts a low-noise shielding pump 6, the shielding pump 6 is installed on the left side of the cooling tower, and a water inlet and a water outlet of the shielding pump 6 are respectively connected with the heat exchanger 1 and the traction converter through a corrugated metal hose 8, so that on one hand, the manufacturing precision of a pipeline and the shielding pump can be effectively reduced, and free adjustment can be performed through the corrugated metal hose 8; on the other hand, the influence on the structure due to the vibration of the shield pump 6 can be reduced, and the service life of the product is prolonged. In addition, the adoption of the canned motor pump effectively reduces the system noise and can provide higher reliability.
In a specific embodiment, the base 9 of the cooling tower is integrally welded by stainless steel, and the structure effectively ensures the structural strength and structural stability of the product. Make its weight lightest when guaranteeing structural strength, the cooling tower adopts both ends "T" type screw rod with the vehicle to be connected, adopt four installation pieces to install at the cooling tower front end, the benefit of this structure lies in that base 9 and vehicle junction atress are more even, can not produce stress concentration because of local atress is too big, the effectual welding strength of having guaranteed, be favorable to between base 9 and the automobile body simultaneously, the good performance of the sealed face between base 9 and the heat exchanger 1, and set up construction bolt before base 9 and heat exchanger 1 on the installation face, more be favorable to plane sealing performance between the two.
The cooling tower fully considers the problem of field maintenance, a visual maintenance door 12 which is simple in structure and detachable is arranged on the rack 2, and the visual maintenance door 12 is installed on the front face of the rack 2 through bolts. The structure is beneficial for field daily inspectors to directly observe the degree of pollution on the surface of the heat exchanger 1 through the visual maintenance door 12; meanwhile, if the surface of the heat exchanger 1 is seriously polluted, field personnel can open the maintenance door in time and directly clean the maintenance door only by using a locomotive lock key, and the operation is simple. The maintenance door greatly reduces the maintenance difficulty, reduces the maintenance cost and effectively prevents system faults caused by external pollution.
The on-line monitoring device of the cooling tower can remotely monitor the air quantity of the cooling fan 3, the temperature of a bearing of the cooling fan and the vibration speed of a fan motor. The online detection device comprises a control module, a signal acquisition module 13 and a signal processing module. The signal acquisition module 13 comprises a wind speed and direction sensor, a vibration speed sensor and a bearing temperature sensor; the wind speed and direction sensor is positioned at an air inlet of the cooling fan 3, the vibration speed sensor is positioned at the bottom of a motor of the cooling fan 3, and the bearing temperature sensor is positioned on a bearing of the motor of the cooling fan 3 (see figure 4 in detail). The signal processing module is a cooling tower signal acquisition terminal, and the control module comprises a detection system host and a train control system host.
The working principle of the on-line monitoring system is shown in a figure 3, a first temperature sensor 14 is arranged at the front end of a bearing of a motor of a cooling fan 3, a second temperature sensor 15 is arranged at the rear end of the bearing, the temperature rise of the front bearing and the rear bearing of the motor is monitored in real time, if the temperature rise of the bearing exceeds 55K, an early warning signal appears, the signal is maintained for 1min, the system reports an abnormal signal, continuously records and archives the signal to a cooling tower signal acquisition terminal, and sequentially sends the signal back to a detection system host and a train control system host.
A three-coordinate vibration speed sensor 16 is arranged at the bottom of a motor of the cooling fan 3 to monitor vibration speeds of the motor in three directions in real time, and under the condition that the rail vehicle continuously runs, when the vibration speed value read by monitoring exceeds a normal value and the maintenance time exceeds 1min, the system reports an abnormal signal, continuously records and archives the signal to a cooling tower signal acquisition terminal, and sequentially sends the signal to a detection system host and a train control system host.
And if the air volume drops, the system sequentially sends the air volume information to the detection system host and the train control system host, and outputs related signals according to the air volume information.
The air quantity of the cooling fan inlet is checked through the online monitoring device, the running condition of the cooling fan can be effectively judged, if data are abnormal, the data can be stored in time, a command is sent to a driver's cab and a remote monitoring database, an engineer can analyze the data at the first time to obtain the reason causing abnormity, and the damage caused by the fault of the cooling fan is avoided in time. Through monitoring the temperature of bearing and the vibration speed of motor around the motor, can monitor the operating condition of motor bearing often, discovery problem before the bearing appears unusually, if take place the temperature out of tolerance or motor vibration speed is too big, vehicle monitoring system can obtain this information the very first time, can send back remote monitoring database with unusual information the very first time through detecting system, is favorable to engineering technical staff to carry out unusual information analysis, in time provides solution.
The utility model discloses the cooling tower mainly carries out refrigerated through air cooling system, water cooling system and oil cooling system to traction current transformer and traction transformer. When the cooling tower works, a motor of the cooling fan rotates to drive the impeller to rotate, air is sucked into the top of the cooling tower through the locomotive roof filtering system, a double-air channel is formed through the double-speed high-efficiency low-noise axial flow fan, and then the air is blown to a rail through the rack, the heat exchanger and the base. And in the process that cooling air passes through the heat exchanger, the heat of cooling liquid in a water flow channel of the heat exchanger is absorbed, and meanwhile, the heat of the traction transformer oil in an oil flow channel of the core body of the heat exchanger is absorbed, so that heat exchange is completed. And the high-temperature cooling water flowing out of the traction converter flows to the water inlet cavity of the heat exchanger through the water outlet pipe of the traction converter, and the cooled low-temperature water enters the shielding pump through the water outlet cavity of the heat exchanger and finally flows into the water inlet pipe of the traction converter. Meanwhile, high-temperature oil flowing out of the traction transformer enters an oil inlet cavity of the heat exchanger through an oil outlet pipeline of the traction transformer, and cooled low-temperature oil flows to the traction transformer through an oil outlet cavity of the heat exchanger. The tower is circulated so that the cooling tower cools the traction converter and the traction transformer through the air cooling system, the water cooling system and the oil cooling system.
To sum up, the utility model provides a high-power cooling tower of EMUs is concentrating to quick power is guaranteeing to pull under converter and the stable prerequisite of traction transformer operational environment temperature, and not only simple structure, the quality is light, easy maintenance, and sealing performance is good, low in manufacturing cost, and the noise is low, and is intelligent, can realize the synchro-cooling to pulling converter and traction transformer simultaneously.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The cooling tower is characterized by comprising a top cover, a rack, a cooling fan, a heat exchanger, a base, a shielding pump, an expansion water tank, an oil pipeline, a water pipeline, a relay and an online detection device, wherein the top cover, the rack, the heat exchanger and the base sequentially form an air cooling channel of the cooling tower from top to bottom, and the top cover, the rack, the heat exchanger and the base are connected through fasteners; the cooling fan is arranged in the rack, and the shielding pump, the expansion water tank and the relay are arranged on the side wall of the rack;
the water inlet cavity of the heat exchanger is connected with the water outlet pipe of the traction converter, the water outlet cavity of the heat exchanger is connected with the water inlet pipe of the shield pump, the water outlet pipe of the shield pump is connected with the water inlet pipe of the traction converter, and the oil pipeline is connected with the traction transformer;
the on-line detection device comprises a control module, a signal acquisition module and a signal processing module, wherein the signal acquisition module is arranged on the cooling fan.
2. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein the signal acquisition module comprises a wind speed and direction sensor, a vibration speed sensor and a bearing temperature sensor; the wind speed and direction sensor is located at an air inlet of the cooling fan, the vibration speed sensor is located at the bottom of a motor of the cooling fan, and the bearing temperature sensor is located on a bearing of the motor of the cooling fan.
3. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein the rack is integrally welded by aluminum alloy.
4. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein the number of the cooling fans is two, the cooling fans are two-speed axial flow fans, and the rack is a rack with double air channels.
5. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein the heat exchanger is a microwave type heat exchanger, the microwave type heat exchanger is of an aluminum alloy fin structure, and a core body of the microwave type heat exchanger is subjected to integral electrophoresis treatment.
6. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein the expansion water tank comprises an upper cavity and a lower cavity, and the upper cavity is connected with the lower cavity through a water pipe; the lower cavity is provided with a water level display instrument and a water level detection switch.
7. The high-power cooling tower for the rapid power concentration motor train unit according to claim 6, wherein a bidirectional pressure valve is further arranged at the top of the expansion water tank; the expansion water tank is made of aluminum alloy.
8. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein a water inlet and a water outlet of the canned motor pump are respectively connected with the heat exchanger and the traction converter through corrugated metal hoses.
9. The high-power cooling tower for the rapid power concentration motor train unit according to claim 1, wherein the base is integrally welded by stainless steel.
10. The high-power cooling tower for the rapid power concentration motor train unit according to any one of claims 1 to 9, wherein a visual maintenance door is arranged on the rack, and the visual maintenance door is installed on the front surface of the rack through bolts.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110906756A (en) * | 2019-12-26 | 2020-03-24 | 湖南联诚轨道装备有限公司 | High-power cooling tower of fast power concentrated motor train unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906756A (en) * | 2019-12-26 | 2020-03-24 | 湖南联诚轨道装备有限公司 | High-power cooling tower of fast power concentrated motor train unit |
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