阅读说明：本技术 一种轨道交通永磁牵引电机冷却装置 (Rail transit permanent magnet traction motor cooling device ) 是由 李昌奇 胡金润 李友瑜 于 2020-06-03 设计创作，主要内容包括：本发明提供了一种轨道交通永磁牵引电机冷却装置,包括风冷装置和水路冷却装置,风冷装置通过主冷风机引入外界空气将换热器中的热量带走,热风通过底座从机车底部的排风口排出,水路冷却装置采用双水泵循环系统,双水泵循环系统充分考虑了水泵、膨胀水箱、连通管道的空间布置问题,双水泵立式安装且并列设置形成两个独立的水冷循环系统,整体结构紧凑；两个独立的水冷循环系统能够根据永磁牵引电机的负载情况,自行调整运行单水泵水冷和/或双水泵水冷循环,能够很好的适应牵引电机的冷却,且具有更好的冷却效果；另外,两个水泵顶部均设置了排气管道与膨胀水箱连接,保证了水泵内的循环流量,解决了水泵电机温升的问题。(The invention provides a cooling device of a permanent magnet traction motor for rail transit, which comprises an air cooling device and a waterway cooling device, wherein the air cooling device introduces external air through a main air cooler to take away heat in a heat exchanger, hot air is discharged from an air outlet at the bottom of a locomotive through a base, the waterway cooling device adopts a double-water-pump circulating system, the double-water-pump circulating system fully considers the space arrangement problem of a water pump, an expansion water tank and a communicating pipeline, the double-water-pump is vertically installed and arranged in parallel to form two independent water cooling circulating systems, and the whole structure is compact; the two independent water cooling circulation systems can automatically adjust and operate single-water pump water cooling and/or double-water pump water cooling circulation according to the load condition of the permanent magnet traction motor, can well adapt to the cooling of the traction motor, and have better cooling effect; in addition, the top parts of the two water pumps are provided with exhaust pipelines connected with the expansion water tank, so that the circulating flow in the water pumps is ensured, and the problem of temperature rise of the water pump motor is solved.)

1. A cooling device for a permanent magnet traction motor of rail transit comprises an air path cooling device and a water path cooling device, and is characterized in that the air path cooling device comprises a top cover, a main air cooler, a cooling device cabinet body, a maintenance door plate, a heat exchanger and a base; the cooling device comprises a base, a cooling device cabinet, a main air cooler, a top cover, a maintenance door plate, a top cover, a cooling device cabinet body, a main air cooler, a main air inlet, a main air outlet, a main air inlet, a main air outlet, a main;

the waterway cooling device comprises a heat exchanger, a first water pump, a second water pump and an expansion water tank; the water outlets of the first water pump and the second water pump are connected with the water inlet of the traction motor, the water outlet of the traction motor is connected with the water inlet of the heat exchanger, and the water outlet of the heat exchanger is connected with the water inlets of the first water pump and the second water pump; waterway cooling device includes main loop and secondary circuit, and the main loop: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through a water outlet pipe of the traction motor, returns to the first water pump and the second water pump through a water outlet pipe of the heat exchanger and is sent back to the traction motor again; a secondary circuit: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the first water pump and the second cooling water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again; the top of first water pump and second water pump has all set up exhaust duct and has been connected with expansion tank.

2. The rail transit permanent magnet traction motor cooling device of claim 1, wherein the primary circuit comprises a first primary circuit and a second primary circuit, the first primary circuit: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through a water outlet pipe of the traction motor, returns to the first water pump through a water outlet pipe of the heat exchanger and is sent back to the traction motor again; a second main loop: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through the traction motor water outlet pipe, returns to the second water pump through the heat exchanger water outlet pipe and is sent back to the traction motor again.

3. The track traffic permanent magnet traction motor cooling device of claim 1, wherein the secondary circuit comprises a first secondary circuit and a second secondary circuit: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the first water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again; a second secondary loop: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the second cooling water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again.

4. The cooling device for the permanent magnet traction motor of the rail transit as claimed in claim 1, wherein the heat exchanger is a thermal-resistance-free heat exchanger; the heat exchanger structure adopts an integrated molding technology, and the thermal resistance of a welding joint is removed.

5. The cooling device for the permanent magnet traction motor of the rail transit as claimed in claim 1, wherein the surface of the heat exchanger is coated with graphene nano anticorrosive paint.

6. The cooling device for the permanent magnet traction motor of the rail transit as claimed in claim 1, wherein the motor of the main cooling fan is a permanent magnet motor.

Technical Field

The invention relates to the technical field of cooling of a traction motor of a rail transit vehicle, in particular to a cooling device of a permanent magnet traction motor of rail transit.

Background

With the rapid development of domestic rail transit, especially higher requirements are put forward on vehicle loss, wherein the reduction of loss by converting an asynchronous traction motor into a synchronous permanent magnet motor becomes a hot spot of current domestic and foreign research. For a high-power traction motor, the heat energy density is high, the electromagnetic iron core permanent magnet is affected by the external environment, the cooling mode that the traditional asynchronous motor adopts forced air cooling needs to be changed, and the problems of complex structure, various auxiliary structures, high manufacturing cost, low space utilization rate, inconvenience in installation and disassembly, high noise, high maintenance cost and the like still exist in the design of the traditional cooling device. Therefore, a novel cooling device for a permanent magnet traction motor for rail transit is urgently needed in the industry.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the cooling device for the permanent magnet traction motor of the rail transit, which has the advantages of simple and compact structure, convenience in maintenance and better cooling effect.

In order to achieve the purpose, the invention provides a cooling device of a permanent magnet traction motor for rail transit, which comprises an air path cooling device and a water path cooling device, wherein the air path cooling device comprises a top cover, a main air cooler, a cooling device cabinet body, a maintenance door plate, a heat exchanger and a base; the cooling device comprises a base, a cooling device cabinet, a main air cooler, a top cover, a maintenance door plate, a top cover, a cooling device cabinet body, a main air cooler, a main air inlet, a main air outlet, a main air inlet, a main air outlet, a main; the waterway cooling device comprises a heat exchanger, a first water pump, a second water pump and an expansion water tank; the water outlets of the first water pump and the second water pump are connected with the water inlet of the traction motor, the water outlet of the traction motor is connected with the water inlet of the heat exchanger, and the water outlet of the heat exchanger is connected with the water inlets of the first water pump and the second water pump; waterway cooling device includes main loop and secondary circuit, and the main loop: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through a water outlet pipe of the traction motor, returns to the first water pump and the second water pump through a water outlet pipe of the heat exchanger and is sent back to the traction motor again; a secondary circuit: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the first water pump and the second cooling water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again; the top of first water pump and second water pump has all set up exhaust duct and has been connected with expansion tank.

Further, the main circuit includes a first main circuit and a second main circuit, the first main circuit: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through a water outlet pipe of the traction motor, returns to the first water pump through a water outlet pipe of the heat exchanger and is sent back to the traction motor again; a second main loop: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through the traction motor water outlet pipe, returns to the second water pump through the heat exchanger water outlet pipe and is sent back to the traction motor again.

Further, the secondary circuit includes a first secondary circuit and a second secondary circuit: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the first water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again; a second secondary loop: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the second cooling water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again.

Further, the heat exchanger is a non-contact thermal resistance heat exchanger; the heat exchanger structure adopts an integrated molding technology, and the thermal resistance of a welding joint is removed.

Further, the surface of the heat exchanger is coated with the graphene nano anticorrosive paint.

Further, a motor of the main air cooler is a permanent magnet motor.

The invention has the following beneficial effects:

the invention provides a cooling device of a permanent magnet traction motor for rail transit, which comprises an air cooling device and a waterway cooling device, wherein the air cooling device introduces external air through a main air cooler to take away heat in a heat exchanger, hot air is discharged from an air outlet at the bottom of a locomotive through a base, the waterway cooling device adopts a double-water-pump circulating system, the double-water-pump circulating system fully considers the space arrangement problem of a water pump, an expansion water tank and a communicating pipeline, the double-water-pump is vertically installed and arranged in parallel to form two independent water cooling circulating systems, and the whole structure is compact; the two independent water cooling circulation systems can automatically adjust and operate single-water pump water cooling and/or double-water pump water cooling circulation according to the load condition of the permanent magnet traction motor, can well adapt to the cooling of the traction motor, and have better cooling effect; in addition, the top parts of the two water pumps are provided with exhaust pipelines connected with the expansion water tank, so that the circulating flow in the water pumps is ensured, and the problem of temperature rise of the water pump motor is solved.

The heat exchanger of the device is a non-contact thermal resistance heat exchanger, the heat exchanger structure adopts an integrated forming technology, the thermal resistance of a welding joint is removed, the whole weight is reduced by 8% compared with the traditional brazing heat exchanger, and meanwhile, the heat exchange efficiency is improved by 9.1%; meanwhile, the graphene nano anticorrosive coating is coated on the surface of the heat exchanger, so that the anticorrosive capacity of the heat exchanger is improved, the metal oxidation corrosion is avoided, and the service life of the heat exchanger is prolonged by 7-8 times compared with that of a heat exchanger subjected to traditional passivation treatment.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a cooling device of a permanent magnet traction motor for rail transit according to the present invention;

FIG. 2 is an exploded view of a rail transit permanent magnet traction motor cooling arrangement of FIG. 1;

the cooling device comprises a base 1, a base 2, a heat exchanger 3, a cooling device cabinet body 4, a maintenance door plate 5, a main air cooler 6, a top cover 7, a side plate 7.1, a reinforcing steel bar frame 8, an expansion water tank 9, an exhaust pipeline 10, a first water pump 11, an expansion water tank water outlet pipe 12, a second water pump 13, a second water pump water outlet 14, a first water pump outlet 15, a first water pump water inlet 16 and a second water pump water inlet.

Detailed Description

Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.

Referring to fig. 1 to 2, the cooling device for the permanent magnet traction motor for rail transit comprises an air path cooling device and a water path cooling device, wherein the air path cooling device comprises a top cover 6, a main air cooler 5, a cooling device cabinet 3, a maintenance door plate 4, a heat exchanger 2 and a base 1; the cooling device comprises a base, a cooling device cabinet, a main air cooler, a top cover, a maintenance door plate, a top cover, a cooling device cabinet body, a main air cooler, a main air inlet, a main air outlet, a main air inlet, a main air outlet, a main; the waterway cooling device comprises a heat exchanger 2, a first water pump 10, a second water pump 12 and an expansion water tank 8; the water outlets of the first water pump and the second water pump are connected with the water inlet of the traction motor, the water outlet of the traction motor is connected with the water inlet of the heat exchanger, and the water outlet of the heat exchanger is connected with the water inlets of the first water pump and the second water pump; waterway cooling device includes main loop and secondary circuit, and the main loop: the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through a water outlet pipe of the traction motor, returns to the first water pump 10 and the second water pump 12 through a water outlet pipe of the heat exchanger and is sent back to the traction motor again; a secondary circuit: high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the first water pump and the second cooling water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again; the top of first water pump and second water pump has all set up exhaust duct 9 and has been connected with expansion tank 8, and the steam that the water pump produced passes through expansion tank cooling and discharges from expansion tank's outlet pipe, has guaranteed the circulation flow in the water pump when having realized circulation system's pressure stability to the problem of water pump motor temperature rise has been solved.

The main circuit comprises a first main circuit and a second main circuit, wherein the first main circuit comprises: a water outlet pipe of the traction motor is communicated with a water inlet pipe of the heat exchanger, a water outlet pipe of the heat exchanger is communicated with a water inlet 15 of a first water pump, and a water outlet 14 of the first water pump is communicated with a water inlet pipe of the traction motor; the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through the traction motor water outlet pipe, returns to the first water pump through the heat exchanger water outlet pipe and is sent back to the traction motor again.

A second main loop: a water outlet pipe of the traction motor is communicated with a water inlet pipe of the heat exchanger, a water outlet pipe of the heat exchanger is communicated with a water inlet 16 of a second water pump, and a water outlet 13 of the second water pump is communicated with a water inlet pipe of the traction motor; the high-temperature cooling water cooling agent in the traction motor flows into the heat exchanger through the traction motor water outlet pipe, returns to the second water pump through the heat exchanger water outlet pipe and is sent back to the traction motor again.

The secondary circuit includes a first secondary circuit and a second secondary circuit: the water outlet pipe 11 of the expansion water tank is communicated with a first water pump, and the water outlet 14 of the first water pump is communicated with a water inlet pipe of a traction motor; part of high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the first water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again; a second secondary loop: the water outlet pipe 11 of the expansion water tank is communicated with a second water pump, and the water outlet 13 of the second water pump is communicated with a water inlet pipe of the traction motor; high-temperature water coolant in the traction motor flows into the expansion water tank through the outlet end of the traction motor, flows into the second cooling water pump through the water outlet pipe of the expansion water tank and is sent back to the traction motor again.

The cooling device cabinet body is a box body with a main air cooler cavity arranged in the outside, the waterway cooling device is arranged on the side wall of the cooling device, the two opposite sides of the side wall are fixedly provided with side plates 7 to support and limit the waterway cooling device, and meanwhile, the two opposite side plates are transversely and transversely connected with reinforcing steel bar supports 7.1 to provide protection and limit for parts such as a water pump and a communicating pipeline of the waterway cooling device.

The heat exchanger of the device is a non-contact thermal resistance heat exchanger, the heat exchanger structure adopts an integrated forming technology, the thermal resistance of a welding joint is removed, the whole weight is reduced by 8% compared with the traditional brazing heat exchanger, and meanwhile, the heat exchange efficiency is improved by 9.1%; meanwhile, the graphene nano anticorrosive coating is coated on the surface of the heat exchanger, so that the anticorrosive capacity of the heat exchanger is improved, the metal oxidation corrosion is avoided, and the service life of the heat exchanger is prolonged by 7-8 times compared with that of a heat exchanger subjected to traditional passivation treatment.

The air cooling device of the device takes away heat in the heat exchanger by introducing external air through the main air cooler, hot air is discharged from an air outlet at the bottom of the locomotive through the base, the water path cooling device adopts a double-water-pump circulating system, the double-water-pump circulating system fully considers the space arrangement problem of a water pump, an expansion water tank and a communicating pipeline, the double water pumps are vertically installed and arranged in parallel to form two independent water cooling circulating systems, and the whole structure is compact; two independent water-cooling circulation systems can adjust the water-cooling of the single water pump and/or the water-cooling circulation of the double water pumps automatically according to the load condition of the permanent magnet traction motor, can well adapt to the cooling of the traction motor, and have a better cooling effect. The device has the advantages of simple structure, convenience in installation and disassembly, easiness in maintenance, low manufacturing cost and high practical value.

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.