WO2023231221A1

WO2023231221A1 - Integrated traction transformer assembly

Info

Publication number: WO2023231221A1
Application number: PCT/CN2022/117801
Authority: WO
Inventors: 钟珩; 朱莉莉; 龙谷宗; 胡贵; 吴勇; 陈日新; 赵康发; 熊涛; 李虹茹; 邓凤祥; 吕春杰; 何泽海; 蔡明星; 杨琰河
Original assignee: 中车株洲电机有限公司
Priority date: 2022-05-31
Filing date: 2022-09-08
Publication date: 2023-12-07
Also published as: CN114843081A

Abstract

An integrated traction transformer assembly, comprising a traction transformer body, a pipeline assembly, and a cooler. The traction transformer body comprises an oil tank; the cooler is fixedly connected to a side portion of the oil tank; the cooler and the oil tank are communicated by means of the pipeline assembly; the pipeline assembly is provided with an oil pump for driving cooling oil to circulate. The integrated traction transformer assembly provided by the present application realizes integrated design, the size is significantly reduced, the integrated traction transformer assembly can be conveniently mounted at the bottom of a rail transit vehicle, and the traction transformer body is cooled by means of traveling air and the cooler.

Description

Integrated traction transformer assembly

This application claims priority to the Chinese patent application filed with the China Patent Office on May 31, 2022, with the application number 202210606104.1 and the application name "Integrated Traction Transformer Assembly", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the rail transit and electrical fields, and in particular to an integrated traction transformer assembly.

Background technique

The rail transit vehicle traction transformer is installed on the train to convert the 25kV high-voltage electricity of the contact network into various low-voltage electricity required by the traction system and auxiliary system. It is a power transformer with a special voltage level that needs to meet the drastic changes in traction load. Requirements, at the same time, it is necessary to suppress harmonic currents and limit short-circuit currents to ensure the safe, stable and reliable operation of the train's electric transmission system. It is the power source of rail vehicles and the core and key component of the traction system.

Existing rail transit vehicle traction transformers usually adopt the forced ventilation cooling method of cooling fans. This kind of transformer is noisy and has low efficiency. The fan requires driving power and requires a lot of maintenance work. The train needs to be equipped with special protection devices and control logic to monitor whether the cooling fan is working properly when the train is running. Moreover, this type of traction transformer occupies a large volume/space, and the installation location is greatly restricted.

Contents of the invention

The purpose of this application is to provide an integrated traction transformer assembly that achieves an integrated design, significantly reduces the volume, and is easy to install on the bottom of a rail transit vehicle. It uses traveling air and a cooler to carry out maintenance on the traction transformer body. cool down.

In order to achieve the above purpose, this application provides an integrated traction transformer assembly, including a traction transformer body, a pipeline assembly and a cooler. The traction transformer body includes an oil tank, and the cooler is fixedly connected to the side of the oil tank. The cooler and the oil tank pass through the pipe. The pipeline assembly is connected, and the pipeline assembly is equipped with an oil pump for driving cooling oil circulation.

In some embodiments, the traction transformer body is provided with a first rib fixedly connected to the oil tank and extending to the outside of the oil tank, and the cooler is installed on the first rib.

In some embodiments, the cooler is provided in two groups and is symmetrically located on both sides of the oil tank, and also includes an oil conservator, a high-voltage outlet line and a low-voltage outlet line. The high-voltage outlet line and the low-voltage outlet line are both arranged on the same side adjacent to the side where the cooler is located. .

In some embodiments, the cooler is disposed on a side parallel to the direction of travel, and further includes an oil conservator, a high-voltage outlet, and a low-voltage outlet. At least one of the oil conservator, the high-voltage outlet, and the low-voltage outlet is disposed away from the fuel tank. side of the cooler.

In some embodiments, the cooler includes a cooling tube group, a base plate and an oil box assembly. The cooling tube group includes multiple rows of cooling tube bodies bent into arc shapes with preset gaps. The cooling tube group is fixed through the base plate and connected to the oil box. components.

In some embodiments, two sets of coolers are arranged in series through a pipeline assembly, which includes a first pipeline, a second pipeline, a third pipeline, a built-in oil channel, a fourth pipeline and a third pipeline that are connected in sequence. Five pipelines. The built-in oil channel is located inside the traction transformer body. The first pipeline is connected to the upper part of the fuel tank. The oil pump is used to extract the hot oil from the upper part of the fuel tank through the first pipeline and send it to the fuel tank through the second pipeline. The cooler on one side, the oil after the initial cooling of the cooler passes through the third pipeline, the built-in oil channel and the fourth pipeline in sequence, and then enters the cooler on the other side of the oil tank, so that the oil after cooling again passes through the third pipeline. Five pipelines flow into the oil tank to cool the transformer oil.

In some embodiments, the gap between any adjacent cooling tube bodies is tapered from the inner circumference to the outer circumference, and further includes a square tube located in the center of the inner circumference of the cooling tube body, connected to the base plate, and used for flow disturbance.

In some embodiments, the oil box assembly includes a first oil box, a second oil box and a third oil box, and the cooling tube group includes a first cooling tube group located at the front end and connected to the first oil box and the second oil box, and a second cooling pipe group located at the rear end and connected to the second oil box and the third oil box, and the gap between the first cooling pipe group and the second cooling pipe group is larger than the first cooling pipe group or the second cooling pipe The group is compared with the gap between the cooling tube bodies; one end of the pipeline component that delivers oil to the cooler is connected to the first oil box, and one end of the pipeline component that is used to extract cooling oil in the cooler is connected to the third oil box.

In some embodiments, it also includes second ribs fixed to both sides of the oil tank. The second ribs are connected to the first longitudinal beam, and the first longitudinal beam is welded with a pin so that the traction transformer body passes through the first longitudinal beam and the first longitudinal beam. The pin is installed on the second longitudinal beam at the bottom of the rail transit.

In some embodiments, the second rib is recessed toward one side of the fuel tank.

The integrated traction transformer assembly provided by this application sets coolers on both sides of the traction transformer body, and uses oil pumps and pipeline components to pump the hot cooling oil from the oil tank of the traction transformer body to the cooler for circulating cooling, making full use of traveling air. It exchanges heat with the hot cooling oil in the cooler, and the cooler is installed and connected to the side of the oil tank, which greatly simplifies the layout of the transformer cooling system, reduces the volume of the integrated traction transformer assembly, and facilitates installation on rail transit vehicles. bottom.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only This is an embodiment of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a schematic installation diagram of an integrated traction transformer assembly provided by an embodiment of the present application;

Figure 2 is a front view of Figure 1;

Figure 3 is a rear view of Figure 1;

Figure 4 is a schematic diagram of the first rib;

Figure 5 is a schematic diagram of the second rib plate;

Figure 6 is a schematic cross-sectional view of the fuel tank;

Figure 7 is an assembly diagram of the cooler provided by the embodiment of the present application from an angle;

Figure 8 is an assembly diagram of the cooler provided by the embodiment of the present application from another angle;

Figure 9 is a top view of Figure 7;

Figure 10 is a schematic diagram of the protective cover;

Figure 11 is an internal schematic diagram of the cooling tube body;

Figure 12 is a schematic installation diagram of an integrated traction transformer assembly provided by yet another embodiment of the present application.

in:

01-Transformer body, 1-Traction transformer body, 2-First pipeline, 3-Oil pump, 4-Second pipeline, 5-First rib plate, 6-Second rib plate, 7-Front-end equipment, 8 -The third pipeline, 9-high voltage outlet, 10-low voltage outlet, 11-fourth pipeline, 12-pin, 13-second longitudinal beam, 14-first longitudinal beam, 15-fifth pipeline, 16 -Rear-end equipment, 17-heat sink, 18-built-in oil channel, 19-vehicle bottom limit, 20-cooler, 21-vibration pad, 22-fuel tank, 23-winding, 24-oil conservator, 25-gear Block, 26-protective cover, 27-cooling tube group, 271-first cooling tube group, 272-second cooling tube group, 28-cooling tube body, 281-reinforcement rib, 29-square tube, 30-reinforcement plate, 31-base plate, 32-first oil box, 33-second oil box, 34-third oil box.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

This application provides an integrated traction transformer assembly, which integrates the cooler 20 on the side of the traction transformer body 1. At the same time, the oil pump 3 and the pipeline assembly can be used to realize the circulation of cooling oil between the traction transformer body 1 and the cooler 20. , cooling the traction transformer body 1. The above settings significantly reduce the volume of the integrated traction transformer assembly, making it easier to install the integrated traction transformer assembly at the bottom of the rail transit vehicle and maintain a set distance from the front-end equipment 7 and the back-end equipment 16, and utilize the complex flow under the vehicle. Field and traveling winds cool the integrated traction transformer assembly, reducing operation and maintenance costs.

In an embodiment provided by this application, with reference to Figures 1 to 5, the direction of the arrow in Figure 1 is the driving direction. The traction transformer body 1 includes a winding 23, a fuel tank 22, a high-voltage outlet 9 and a low-voltage outlet 10. The two opposite sides of the fuel tank 22 are provided with first ribs 5 extending outward. Two sets of first ribs 5 are provided on each side. The two sets of first ribs 5 on one side of the fuel tank 22 are respectively located at the front end of the fuel tank 22 and the rear end, the lower end of the first rib 5 is set to be nearly rectangular, and a row of mounting holes is vertically opened on the side of the first rib 5 away from the fuel tank 22. The cooler 20 is connected and fixed to the first rib 5 through the mounting holes. A hole is provided below the first rib plate 5 for the oil supply pipe assembly to pass through and be fixed.

A pair of second ribs 6 are also provided outside the oil tank 22 of the traction transformer body 1. The second ribs 6 are recessed toward the oil tank 22 to avoid the cooler 20 as much as possible to increase the heat exchange area of the cooler 20. The end of the second rib 6 away from the fuel tank 22 is fixedly connected to the first longitudinal beam 14, and the outside of the first longitudinal beam 14 is vertically connected to the pin 12, so that the second longitudinal beam 13 is arranged along the driving direction within the vehicle bottom limit 19, The integrated traction transformer assembly is installed on the bottom of the vehicle with the help of the second longitudinal beam 13, the pin 12, the first longitudinal beam 14 and the second rib 6. The pin 12 can be connected to the second longitudinal beam 13 through a vibration-absorbing pad 21 to isolate the vibration caused by the magnetostriction of the core during operation of the transformer. Regarding the vehicle bottom limit 19, the vehicle bottom limit 19 is used to connect to the bottom of the carriage. The top of the vehicle bottom limit 19 is wide and the bottom is narrow. The two sides extend obliquely from top to bottom toward the center of the carriage. The two sides are set in an arc shape to fully communicate with the cooler. 20 fits snugly, making it convenient to pass through the tunnel, while balancing the side airflow, reducing the side resistance of driving, and improving the cooling efficiency of the cooler 20 .

In this embodiment, the high-voltage outlet line 9 and the low-voltage outlet line 10 are both arranged on the same side adjacent to the side where the cooler 20 is located, that is, as shown in Figure 1, on the side adjacent to the installation side of the cooler 20, reducing the need for traction transformers. The size of the body 1 in the driving direction; the oil conservator 24 can be arranged on the top of the fuel tank 22, or can also be arranged in other positions according to actual needs, which is not limited in this article. There is an internal connection between the oil conservator 24 and the oil tank 22 through a pipeline. When the internal temperature of the transformer rises, the oil volume in the oil tank 22 expands and flows to the oil conservator 24. When the internal temperature of the transformer decreases, the oil volume in the oil tank 22 Zoom out, and the oil in the oil conservator 24 flows into the oil tank 22 for compensation. In specific implementation, both the high-voltage outlet line 9 and the low-voltage outlet line 10 and the oil conservator 24 can also be separately located on a pair of adjacent sides of the oil tank 22 and the side where the cooler 20 is located with reference to FIG. 12 . The oil tank 22 is connected to the cooler 20 through the pipeline assembly and the oil pump 3. The hot cooling oil is extracted from the oil tank 22 through the oil pump 3, sent to the cooler 20 for cooling, and then returned to the oil tank 22.

In one embodiment, the traction transformer body 1 , that is, the bottom of the fuel tank 22 is provided with multiple rows of heat sinks 17 . The heat sinks 17 penetrate the entire bottom of the fuel tank 22 to increase the heat dissipation area at the bottom. The heat sinks 17 are arranged at equal intervals. When the integrated traction transformer assembly is installed at the bottom of a rail transit vehicle, each row of radiators 17 is parallel to the driving direction, reducing the resistance to passage of traveling wind. The bottom of the heat sink 17 does not exceed the vehicle bottom limit 19, making full use of the high flow velocity traveling wind at the bottom of the vehicle for heat dissipation and increasing the heat dissipation capacity of the transformer.

Of course, during specific implementation, the heat sinks 17 can also be arranged at non-equal intervals. The heat sinks 17 can be directly welded to the bottom of the fuel tank 22, or can be welded to a heat sink first and then connected to the bottom of the fuel tank 22. This application does not cover this. limit.

In the above embodiment, taking the two sets of coolers 20 respectively fixed on both sides of the fuel tank 22 as an example, the pipeline assembly includes a first pipeline 2, a second pipeline 4, a third pipeline 8, and a fourth pipeline 11. , the fifth pipeline 15 and the built-in oil channel 18, the first pipeline 2 is connected to the upper part of the oil tank 22, the oil pump 3 draws out the hot oil in the upper part of the transformer oil tank 22 through the first pipeline 2, and sends it to the location through the second pipeline 4. The oil initially cooled by the cooler 20 on one side of the oil tank 22 passes through the third pipeline 8, the built-in oil channel 18, and the fourth pipeline 11 in sequence, and then enters the other side of the oil tank 22 for cooling. The oil cooled again by the cooler 20 located on the other side of the oil tank 22 flows into the oil tank 22 through the fifth pipeline 15 to achieve cooling of the transformer oil.

That is, the first pipeline 2, the oil pump 3, the second pipeline 4, the cooler 20 on one side of the fuel tank 22, the third pipeline 8, the built-in oil passage 18, the fourth pipeline 11, and the cooling on the other side of the fuel tank 22 The controller 20 and the fifth pipeline 15 together form a series oil circuit, and at the same time, a built-in oil passage 18 is used, which simplifies the layout of the oil circuit, reduces the size of the integrated traction transformer assembly in the driving direction, and saves installation space for equipment under the vehicle; and At the same time, the use of built-in oil passage 18 simplifies the layout of the oil passage, reduces the size of the cooling system and the transformer in the driving direction, reduces the overall weight of the transformer, and saves equipment installation space under the vehicle.

In addition, the built-in oil passage 18 can also be replaced by an external pipeline. The external pipeline is provided outside the oil tank 22, and the two ends of the external pipeline are connected to the third pipeline 8 and the fourth pipeline 11 respectively. Thereby realizing the connection of oil circuit.

Please refer to Figure 6. The built-in oil channel 18 is arranged inside the oil tank 22. The oil tank 22 and the transformer body 01 are located close to each other. The cross section of the built-in oil channel 18 is arranged in a triangular shape. The built-in oil channel 18 is perpendicular to the driving direction and runs through the entire inside of the transformer. . Since the transformer winding is round, there is a relatively large space at the corner with the oil tank 22. The built-in oil passage 18 makes full use of the space at the corner, avoiding the need to set up a separate oil pipe outside the oil tank 22 to occupy additional space, which is conducive to the compactness of the transformer. Optimized, lightweight and simple design. Of course, the cross-section of the built-in oil passage 18 can also be set in other conformable shapes, which will not be discussed in this article.

Furthermore, the outer shapes of the two coolers 20 can be set to be arc-shaped, and the two coolers 20 are conformable to the bottom limit 19 of the vehicle. At the same time, the two coolers 20 are respectively adjacent to both sides of the bottom limit 19, so that the vehicle body can be fully utilized. space to prevent the two coolers 20 from occupying too much space, and at the same time improve the heat dissipation effect of the two coolers 20.

In one embodiment, a group of coolers 20 can also be provided. A group of coolers 20 is arranged on one side parallel to the traveling direction of the fuel tank 22 through the first rib 5. The high-voltage outlet line 9, the low-voltage outlet line 10 and the oil storage At least one of the three cabinets 24, such as the low-voltage outlet 10, is disposed on the opposite side of the oil tank 22 where the cooler 20 is located. Correspondingly, the high-voltage outlet 9 and the oil conservator 24 can be separately located on the side of the oil tank 22 where the cooler 20 is located. Adjacent sides.

Referring to Figures 7 to 11, the cooler 20 of the integrated traction transformer assembly provided by one embodiment of the present application mainly includes a cooling pipe group 27, a base plate 31 and an oil box assembly. The cooling pipe group 27 is fixed to the base plate 31 and It communicates with the oil box assembly through the base plate 31. In this embodiment, the oil box assembly includes a first oil box 32, a second oil box 33 and a third oil box 34, that is, it has three cavities. The cooling pipe group 27 includes multiple rows of cooling pipe bodies 28 bent in an arc shape with preset gaps. The cooling pipe bodies 28 of each row are arranged coplanarly, and the plane of the cooling pipe body 28 of each row is perpendicular to the driving direction, so that The cooling tube group 27 forms a plurality of channels parallel to the driving direction, which is conducive to the passage of traveling wind through the channels; of course, during specific implementation, the cooling tube bodies 28 of each row can also be staggered and not in the same plane. There are no restrictions on this.

A plurality of reinforcing plates 30 are provided between the cooling pipe bodies 28. The plurality of reinforcing plates 30 are parallel to the driving direction and arranged in the vertical driving direction. This can increase the overall strength of the cooling pipe group 27 and prevent large-scale accidents during operation. vibration.

According to the connection with different oil boxes, the cooling pipe group 27 further includes a first cooling pipe group 271 located at the front end in the driving direction and composed of a plurality of cooling pipe bodies 28; and a third cooling pipe group 271 located at the rear end in the driving direction and composed of a plurality of cooling pipe bodies 28. Two cooling tube groups 272. The gap between the first cooling pipe group 271 and the second cooling pipe group 272 is larger than the gap between the cooling pipe bodies 28 of the first cooling pipe group 271 or the second cooling pipe group 272, reducing the flow of traveling wind into the second cooling pipe group 272. Wind resistance; of course, in specific implementation, the gap between the first cooling pipe group 231 and the second cooling pipe group 232 can also be equal to the gap between the cooling pipe body 24 of the first cooling pipe group 231 or the second cooling pipe group 232. There are no restrictions on applications. Among them, the pipeline assembly transports the hot cooling oil from the oil tank 22 to the first oil box 32, and the first oil box 32 transports the hot cooling oil to the second oil box 33 through the first cooling pipe group 271 on the periphery. After mixing, it flows into the third oil box 34 through the second cooling pipe group 272 and is transported from the third oil box 34 and pipeline assembly to another cooler 20 .

The cooling tube body 28 can be a round tube, a flat tube, an elliptical tube, etc., and is not limited here. The gap between the cooling tube bodies 28 gradually decreases from the inner circumference to the outer circumference, that is, the cooling tube body 28 on the inner circumference has a larger gap between rows, so that when the train is running, the cooler is carried out in the middle of the cooling tube group 27 20 The full exchange and mixing of internal hot air and external cold air is conducive to improving the cooling power of the rear-end cooling pipe group. Of course, during specific implementation, the cooling pipe bodies 28 can also be arranged at equal intervals, and this application does not limit this.

In one embodiment, the center of the cooling tube group 27, that is, the innermost cooling tube body 28, is also provided with a square tube 29 connected to the base plate 31 to disturb the air flowing in the middle and increase the heat transfer effect of the cooling tube group 27. Increase cooling power. The outside of the cooler 20 is provided with a grille-shaped protective cover 26 to prevent foreign objects such as stones under the vehicle from impacting the cooler 20. The protective cover is surrounded by folds with holes, and bolts pass through the holes on the folds. Holes connect the shield 26 to the base plate 31 . The grille ribs at the inlet and outlet of the traveling wind of the protective cover 26 are thin, the cross-section of the ribs is small, and the size of the ribs along the driving direction is long, which reduces the resistance of the traveling wind and increases the strength of the grille; at the same time, the bottom of the protective cover 26 The grille bars near the ground are denser, and the spacing between the grille bars increases in the upward direction, that is, the size of the grille holes below the protective cover 26 is smaller to increase the protective effect, and the size of the grille holes above it increases. Larger, reducing the resistance of traveling wind entering the cooler 20; taking into account the protective effect of the cooler 20 and reducing wind resistance.

Blocks 25 are provided above the coolers 20 on both sides to compensate for the gap between the cooler 20 and the vehicle bottom limit 19, prevent the wind inside the cooler 20 from entering the gap, and increase the air volume entering the cooler 20. At the same time, the heat dissipation area is increased. The cooling tube body 28 is also provided with reinforcing ribs 281 as shown in Figure 11. The reinforcing ribs 281 are used to disturb the oil flow and increase the heat transfer effect. At the same time, the heat dissipation area on the oil side can also be increased, improving the heat dissipation power, which is beneficial to the transformer and cooling The miniaturization and lightweight design of the device 20.

It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply the existence of any such relationship between these entities. Actual relationship or sequence.

The integrated traction transformer assembly provided by this application has been introduced in detail above. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

An integrated traction transformer assembly is characterized in that it includes a traction transformer body, a pipeline assembly and a cooler. The traction transformer body includes an oil tank. The cooler is fixedly connected to the side of the oil tank. The cooler It is connected with the oil tank through the pipeline assembly, and the pipeline assembly is provided with an oil pump for driving cooling oil circulation.
The integrated traction transformer assembly according to claim 1, wherein the traction transformer body is provided with a first rib fixedly connected to the oil tank and extending to the outside of the oil tank, and the cooler is installed on the Describe the first rib.
The integrated traction transformer assembly according to claim 2, wherein the cooler is provided in two groups and is symmetrically located on both sides of the oil tank, and further includes an oil storage tank, a high-voltage outlet line and a low-voltage outlet line. The high-voltage outlet line and the low-voltage outlet line are both arranged on the same side adjacent to the side where the cooler is located.
The integrated traction transformer assembly according to claim 2, characterized in that the cooler is arranged on a side parallel to the direction of travel, and further includes an oil storage tank, a high-voltage outlet line, and a low-voltage outlet line, and the oil storage tank At least one of the cabinet, the high-voltage outlet line, and the low-voltage outlet line is located on a side of the oil tank facing away from the cooler.
The integrated traction transformer assembly according to any one of claims 2 to 4, wherein the cooler includes a cooling pipe group, a base plate and an oil box assembly, and the cooling pipe group includes multiple rows with preset gaps. The cooling pipe body is bent into an arc shape, and the cooling pipe group is fixed through the base plate and connected to the oil box assembly.
The integrated traction transformer assembly according to claim 3, characterized in that, two groups of the coolers are arranged in series through the pipeline assembly, and the pipeline assembly includes a first pipeline, a second pipeline, and a second pipeline that are connected in sequence. pipeline, a third pipeline, a built-in oil channel, a fourth pipeline and a fifth pipeline, the built-in oil channel is located inside the traction transformer body, the first pipeline is connected to the upper part of the oil tank, The oil pump is used to pump out the hot oil in the upper part of the oil tank through the first pipeline and send it to the cooler located on one side of the oil tank through the second pipeline. The cooler is used for primary cooling. After the oil passes through the third pipeline, the built-in oil channel and the fourth pipeline in sequence, it enters the cooler located on the other side of the oil tank, so that the oil after cooling again passes through the The fifth pipeline flows into the oil tank to realize cooling of the oil.
The integrated traction transformer assembly according to claim 5, characterized in that the gap between any adjacent cooling pipe bodies is tapered from the inner circumference to the outer circumference, and further includes a gap between the cooling pipe bodies located on the inner circumference. In the center, a square tube connects the base plate and serves as a spoiler.
The integrated traction transformer assembly according to claim 5, wherein the oil box assembly includes a first oil box, a second oil box and a third oil box, and the cooling pipe group includes a cooling pipe assembly located at the front end and connected to The first cooling pipe group of the first oil box and the second oil box, and the second cooling pipe group located at the rear end and connected to the second oil box and the third oil box, and the The gap between the first cooling tube group and the second cooling tube group is larger than the gap between the first cooling tube group or the second cooling tube group and the cooling tube body; the pipeline One end of the assembly that delivers oil to the cooler is connected to the first oil box, and one end of the pipeline assembly that is used to extract cooling oil in the cooler is connected to the third oil box.
The integrated traction transformer assembly according to claim 1, further comprising a second rib fixed to both sides of the oil tank, the second rib connected to a first longitudinal beam, the third rib A longitudinal beam is welded with a pin, so that the traction transformer body is installed on the second longitudinal beam at the bottom of the rail transit through the first longitudinal beam and the pin.
The integrated traction transformer assembly according to claim 9, wherein the second rib is recessed toward the side of the fuel tank.