CN114843079A

CN114843079A - Traction transformer assembly of rail transit vehicle

Info

Publication number: CN114843079A
Application number: CN202210606648.8A
Authority: CN
Inventors: 胡贵; 钟珩; 朱莉莉; 龙谷宗; 吴勇; 谭文俊; 赵康发; 陈日新; 熊涛; 邓凤祥; 吕春杰; 何健; 卜晶; 谷秀甜; 吴为
Original assignee: CRRC Zhuzhou Electric Co Ltd
Current assignee: CRRC Zhuzhou Electric Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-08-02
Also published as: WO2023231220A1

Abstract

The application relates to the field of rail transit and electricity, and discloses a rail transit vehicle traction transformer assembly which mainly comprises a bracket assembly, a traction transformer assembly and a traction transformer assembly, wherein the bracket assembly is fixedly connected to the bottom of a vehicle and is arranged in the middle relative to the limit of the bottom of the vehicle; the traction transformer body is arranged at one end of the bracket assembly; and the cooler assembly is suspended separately from the traction transformer body and extends to two sides of the bracket assembly, and is used for cooling oil in the traction transformer body in a circulating manner. The rail transit vehicle traction transformer assembly that this application provided is applicable to the vehicle bottom and arranges, utilizes the cooling oil cooling of walking wind and cooler assembly to the traction transformer body, and cooling power is big, can cancel forced draft cooling blower, reduces transformer noise by a wide margin, promotes transformer efficiency, reduces by a wide margin and overhauls the maintenance operation, retrencies whole car and arranges and control, reduces the fault probability, promotes whole car and traction transformer's reliability, reduces transformer full life cycle fortune dimension cost by a wide margin.

Description

Traction transformer assembly of rail transit vehicle

Technical Field

The application relates to the field of rail transit and electricity, in particular to a rail transit vehicle traction transformer assembly.

Background

The track traffic vehicle traction transformer is arranged on a train, converts high-voltage electricity of 25kV of a contact network into various low-voltage electricity required by a traction system and an auxiliary system, is a power transformer with a special voltage class, needs to meet the requirement of severe traction load change, and simultaneously needs to suppress harmonic current and limit short-circuit current, so that the safe, stable and reliable operation of an electric transmission system of the train is ensured, and the track traffic vehicle traction transformer is a power source of a track vehicle and is a core and a key component of the traction system.

The existing rail transit vehicle traction transformer usually adopts a cooling mode of forced ventilation of a cooling fan. The transformer has the advantages of higher noise, lower efficiency, driving power consumption of the fan, more maintenance work, and special protection devices and control logics for the train, so as to monitor whether the cooling fan works normally when the train runs. Along with the improvement of low energy consumption requirements of electrical equipment in various countries in the world, the rapid development of rail transit and the improvement of requirements of people on riding comfort and safety, how to develop rail transit parts which are green, economical, environment-friendly, safe, reliable, lower in noise, higher in efficiency, lower in component driving power consumption, less in maintainability, fewer in components and control is increasingly important.

Disclosure of Invention

The utility model provides a rail transit vehicle traction transformer assembly is applicable to the vehicle bottom and arranges, utilizes the cooling oil of walking wind and cooler assembly to the traction transformer body, and cooling power is big, can reduce the transformer noise, promotes transformer efficiency, reduces the maintenance operation, reduces transformer full life cycle fortune dimension cost.

In order to achieve the above object, the present application provides a rail transit vehicle traction transformer assembly, including:

the support assembly is fixedly connected to the bottom of the vehicle and arranged in the middle relative to the limit of the bottom of the vehicle;

the traction transformer body is arranged at one end of the bracket assembly;

and the cooler assembly is suspended separately from the traction transformer body and extends to two sides of the bracket assembly, and is used for cooling the cooling oil in the traction transformer body in a circulating manner.

In some embodiments, the support assembly includes a first longitudinal beam and a cross beam, a pair of the first longitudinal beams for being fixedly connected to two sides of the bottom of the vehicle along the driving direction; the pair of cross beams are perpendicular to the first longitudinal beam at a preset interval and connected to the first end of the first longitudinal beam;

the traction transformer body is fixed between the second ends of the pair of first longitudinal beams, and the cooler assembly comprises a pair of coolers, a pipeline component and an oil pump, wherein the pipeline component is communicated with the coolers and the traction transformer body, and the oil pump is arranged in the pipeline component and used for pumping cooling oil; a pair of coolers is fixed at two ends of the beam respectively.

In some embodiments, the traction transformer body comprises a winding, an oil tank, an oil storage cabinet, a high-voltage outgoing line, a low-voltage outgoing line, a pair of second longitudinal beams which are parallel to the travelling direction and located on two sides of the oil tank, and connecting rib plates which are arranged on two sides of the oil tank and are used for connecting the oil tank and the second longitudinal beams, the second longitudinal beams are welded with pin shafts, and the traction transformer body is mounted on the first longitudinal beams through the pin shafts.

In some embodiments, the high-voltage outlet wire, the low-voltage outlet wire and the oil conservator are respectively arranged on the side surface of the oil tank in the vertical driving direction; or the oil conservator is arranged at the top of the oil tank.

In some embodiments, the cooler comprises a cooling tube bank, a base plate, an oil box assembly, and a mounting bracket; the cooling pipe group is communicated with the oil box assembly through the substrate, the oil box assembly comprises at least two cavities which are respectively communicated with the two ends of the cooling pipe group, the pipeline assembly is communicated with the oil inlet end and the oil outlet end of the cooler, the pipeline assembly is also respectively communicated with different cavities of the oil box assembly, and the mounting frame is fixedly connected with the substrate and is mounted on the cross beam.

In some embodiments, the cooling tube group includes a plurality of rows of cooling tube bodies bent at predetermined intervals to form an arc shape, the plane of all the cooling tube bodies is perpendicular to the driving direction, the cooling tube bodies located at the periphery are arranged to fit the limit of the bottom of the vehicle, and a reinforcing plate is connected between adjacent cooling tube bodies.

In some embodiments, the gap between any adjacent cooling tube bodies is tapered from the inner periphery to the outer periphery, and the cooling tube further comprises a square tube which is arranged in the center of the cooling tube body on the inner periphery and is connected with the base plate and used for turbulent flow.

In some embodiments, the oil box assembly includes a first oil box, a second oil box, and a third oil box, the cooling tube group includes a first cooling tube group provided at a front end and communicating the first oil box and the second oil box, and a second cooling tube group provided at a rear end and communicating the second oil box and the third oil box, and a gap between the first cooling tube group and the second cooling tube group is larger than a gap between the first cooling tube group or the second cooling tube group as compared to the cooling tube body; one end of the pipeline assembly, which is used for delivering oil to the cooler, is communicated to the first oil box, and one end of the pipeline assembly, which is used for extracting cooling oil in the cooler, is communicated to the third oil box.

In some embodiments, the traction transformer body is resiliently suspended from the first longitudinal beam, and the conduit assembly includes a metal bellows for absorbing vibrational displacement of the traction transformer body.

In some embodiments, a protective cover is provided on the outside of the cooler, and the top of the cooler is provided with a hollow stop/heat sink for engaging the bottom of the vehicle.

In some embodiments, the cooling tube body is provided with reinforcing ribs for turbulent flow.

In some embodiments, the bottom of the traction transformer body is provided with a cooling fin, and the extending direction of the cooling fin is coincident with the travelling direction.

The traction transformer assembly of the rail transit vehicle is skillfully and reasonably designed, by reasonably setting the relative positions of the traction transformer body and the cooler assembly, the traction transformer is cooled by utilizing the traveling wind around the traction transformer body when a vehicle runs, the traction transformer is suitable for the arrangement of the bottom of the vehicle with complicated flow field and wind speed distribution, can cancel forced ventilation cooling fan, greatly reduce noise of transformer (can reduce more than 15dB (A)), raise efficiency of transformer (can raise about 2%), has no consumption of fan driving power, greatly reduce maintenance operation, the original fan protection device, control logic and the like on the filter and the train can be cancelled, the arrangement and control of the whole train are simplified, the fault occurrence probability is reduced, the reliability of the whole train and the traction transformer is improved, and the operation and maintenance cost of the whole life cycle of the rail transit traction transformer is greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic installation diagram of a rail transit vehicle traction transformer assembly provided in an embodiment of the present application;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a left side view of the chiller assembly of FIG. 1;

FIG. 4 is an angled assembly view of a cooler provided in accordance with embodiments of the present application;

FIG. 5 is an assembly view of another angle of a cooler provided by an embodiment of the present application;

FIG. 6 is a top view of FIG. 4;

FIG. 7 is a schematic view of a cooler shield according to an embodiment of the present application;

FIG. 8 is a schematic view of the interior of a cooling tube body according to an embodiment of the present application;

FIG. 9 is a schematic view of an oil box assembly of a chiller according to yet another embodiment of the present application;

FIG. 10 is a schematic view of a chiller according to yet another embodiment of the present application;

FIG. 11 is a schematic view of an installation of a rail transit vehicle traction transformer assembly according to yet another embodiment of the present application;

fig. 12 is a schematic installation diagram of a rail transit vehicle traction transformer assembly according to still another embodiment of the present application.

Wherein:

1-bracket assembly, 2-first pipeline, 3-traction transformer body, 4-oil pump, 5-second pipeline group, 6-cross beam, 7-third pipeline group, 8-connection rib plate, 9-second longitudinal beam, 10-pin shaft, 11-first longitudinal beam, 12-high-voltage outgoing line, 13-low-voltage outgoing line, 14-radiating fin, 15-vehicle bottom limit, 16-cooler, 17-damping pad, 18-oil tank, 19-winding, 20-oil storage cabinet, 21-hollow block/radiating protrusion, 22-protective cover, 23-cooling pipe group, 231-first cooling pipe group, 232-second cooling pipe group, 24-cooling pipe body, 241-reinforcing rib, 25-square pipe, 26-reinforcing plate, 27-base plate, 28-mounting frame, 29-first oil box, 30-second oil box, 31-third oil box, 32-flange.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.

The application discloses rail transit vehicle traction transformer assembly, can realize arranging at rail transit's vehicle bottom, and the complicated flow field of make full use of vehicle bottom cools off traction transformer body 3 with walking wind, need not to set up the fan cooling, can realize with the help of the circulation of 4 drive cooling oil of miniature oil pump between cooler assembly and traction transformer body 3, cooling power consumption and fan have been reduced and maintenance, fortune dimension cost such as detection, promote traction transformer body 3's efficiency, the noise of operation is reduced, the fortune dimension cost of 3 life-spans of traction transformer body is showing and has been reduced.

Referring to fig. 1 to 3, an arrow direction in fig. 1 is a driving direction, and an embodiment of the present application provides a traction transformer assembly for a rail transit vehicle, which mainly includes a bracket assembly 1, a traction transformer body 3, a cooler assembly, and other components. The middle vehicle of the support is fixedly connected to the bottom of the vehicle and is arranged in the middle relative to a vehicle bottom limit 15, and the cooler assembly and the traction transformer body 3 are arranged below the support assembly 1. Wherein, the traction transformer body 3 is installed in the one end below of support assembly 1 between two parties, and the cooler assembly is installed in the both sides of support assembly 1 to realize relative automobile body and vehicle bottom clearance 15 symmetrical arrangement between two parties, be favorable to focus and vehicle center coincidence and improve the dynamic balance of vehicle. In 15 within ranges of vehicle bottom boundary limit, the walking wind speed that is close to both sides is bigger than the centre, the walking wind that is close to the bottom of vehicle bottom boundary limit 15 is bigger than the upper end, this application is through installing traction transformer body 3 between two parties at support assembly 1, install the both sides on support assembly 1 with the cooler assembly, satisfy traction transformer body 3's vehicle bottom installation demand, make full use of the high-speed walking wind of vehicle bottom cools off the cooler assembly simultaneously, cool off traction transformer body 3 with the help of the circulation of fuel between traction transformer body 3 and cooler assembly.

In one embodiment, the rack assembly 1 includes a pair of first longitudinal beams 11 and a pair of cross beams 6, the pair of first longitudinal beams 11 are parallel to the traveling direction and are arranged at two sides of the bottom of the vehicle at a first preset interval, the pair of cross beams 6 are arranged at a first end of the first longitudinal beams 11 at a second preset interval, and the traction transformer body 3 is arranged at a second end of the pair of first longitudinal beams 11. The cross beam 6 is connected with a pair of first longitudinal beams 11, and a sliding groove is formed in the cross beam 6, so that the cooler assembly can be quickly installed in place through T-shaped bolts and the like. The chiller assembly includes a pair of chillers 16, a piping component and an oil pump 4. The cooler 16 is essentially an air-cooled heat exchanger, and has an oil side communicated with a pipeline assembly and performing heat exchange with cooling oil in a circulating manner, a pair of coolers 16 are symmetrically installed at two ends of the cross beam 6, the pipeline assembly is communicated with the traction transformer body 3 and the cooler 16, and the oil pump 4 is arranged in the pipeline assembly, so that the hot cooling oil pump 4 in the traction transformer body 3 is conveyed to the cooler 16 to be cooled and then conveyed back to the traction transformer body 3.

The traction transformer body 3 comprises a winding 19, an oil tank 18, an oil storage cabinet 20, a high-voltage outgoing line 12, a low-voltage outgoing line 13 and the like, wherein the winding 19 is immersed in the oil tank 18, the oil tank 18 is communicated with the pipeline assembly, and cooling oil can circulate between the oil tank 18 and the cooler 16 through the pipeline assembly and the oil pump 4. In the embodiment shown in fig. 1 and 2, the high-voltage outgoing line 12 and the low-voltage outgoing line 13 are both arranged on the side of the oil tank 18 perpendicular to the driving direction and far away from the cooler 16, so that the space under the vehicle is fully utilized, the equipment arrangement on two sides of the traction transformer body 3 is reduced, the phenomenon that the oil conservator 20, the high-voltage outgoing line 12 and the low-voltage outgoing line 13 are arranged on two sides of the transformer to block the running wind from entering the cooler 16 is avoided, the resistance of the running wind flowing to the cooler 16 is reduced, and the heat dissipation power of the cooler 16 is increased. The oil conservator 20 is arranged on the top of the oil tank 18, the oil conservator 20 is communicated with the transformer oil tank 18 through an internal pipeline, when the temperature in the transformer rises, the oil volume in the oil tank 18 expands and flows to the oil conservator 20, when the temperature in the transformer falls, the oil volume in the oil tank 18 is reduced, and the oil in the oil conservator 20 flows into the oil tank 18 for compensation.

The traction transformer body 3 further comprises a connecting rib plate 8 and a pair of second longitudinal beams 9, the connecting rib plate 8 is arranged on two sides of the oil tank 18 and connected with the oil tank 18 and the second longitudinal beams 9, the second longitudinal beams 9 are arranged in parallel with the first longitudinal beams 11, the second longitudinal beams 9 are welded with the pin shafts 10, and the traction transformer body 3 is installed on the first longitudinal beams 11 through the second longitudinal beams 9 and the pin shafts 10. The connecting rib plate 8 is arranged in an inward concave shape shown in fig. 2, so that shielding of the cooler 16 in the traveling direction is reduced, resistance of traveling wind entering the cooler 16 is reduced, and heat dissipation power of the cooler 16 is increased. In addition, the traction transformer body 3, namely the bottom of the oil tank 18, is provided with a plurality of rows of radiating fins 14, and the radiating fins 14 extend along the driving direction and are arranged at the bottom of the whole oil tank 18, so that the bottom radiating area is increased. The radiating fins 14 are preferably arranged at equal intervals, and each row of radiating fins 14 is parallel to the traveling direction, so that the resistance of traveling wind is reduced. The bottom of the radiating fin 14 does not exceed the bottom limit 15 of the vehicle, but is close to the bottom limit of the vehicle, so that the surface area of the radiating fin 14 can be increased to the maximum extent, the radiating effect of the radiating fin 14 is improved, and the radiating reliability of the vehicle in the process of traveling is ensured.

In a further embodiment, the outer periphery of the pin shaft 10 is provided with a damping pad 17, the first longitudinal beam 11 is provided with a slot for accommodating the damping pad and the pin shaft 10, the pin shaft 10 is mounted on the first longitudinal beam 11 through the damping pad 17, and vibration caused by iron core magnetostriction during the operation of the isolation transformer is transmitted to the first longitudinal beam 11 and other parts of the vehicle.

The arrangement of the high-voltage outgoing line 12, the low-voltage outgoing line 13 and the oil conservator 20 can refer to the above embodiment, and also refer to fig. 11, the high-voltage outgoing line 12 and the oil conservator 20 are both arranged on the side of the oil tank 18 far away from the cooler 16, the low-voltage outgoing line 13 is arranged on the side of the oil tank 18 close to the cooler 16, and also refer to fig. 12, the high-voltage outgoing line 12 and the low-voltage outgoing line 13 are arranged on the side of the oil tank 18 far away from the cooler 16, and the oil conservator 20 is arranged on the upper portion of the side of the oil tank 18 close to the cooler 16, that is, the high-voltage outgoing line 12, the low-voltage outgoing line 13 and the oil conservator 20 are respectively arranged on two opposite sides of the oil tank 18 in the vertical driving direction. The above arrangement reduces the arrangement of equipment on both sides of the oil tank 18 and reduces the obstruction of the cooler 16 in the driving direction.

In the particular embodiment provided herein, the cooler 16 basically includes a cooling tube bank 23, a base plate 27, an oil pan assembly and a mounting bracket 28. The oil box assembly comprises at least two cavities connected to two ends of the cooling pipe group 23, the pipeline assembly conveys hot oil to one cavity, the hot oil is conveyed to the other cavity after being radiated by the cooling pipe group 23, and finally the hot oil flows back to the oil tank 18 through the pipeline assembly. The coolers 16, namely the outer sides of the cooling pipe groups 23 are arc-shaped and conform to the vehicle bottom limit 15, meanwhile, the two coolers 16 are respectively arranged at two sides tightly attached to the vehicle bottom side limit, the coolers 16 are arranged by fully utilizing the high flow velocity areas at the two side edges of the vehicle bottom, and the cooling efficiency of the coolers 16 is effectively improved. The application provides a traction transformer assembly still includes vehicle bottom boundary limit 15, and vehicle bottom boundary limit 15 is used for connecting in the bottom in carriage, and vehicle bottom boundary limit 15's top is wide, and the bottom is narrow, and both sides face from the top down to carriage central authorities slope extension, and both sides face sets up to the arc, fully with 16 laminating adaptations of cooler, when conveniently passing through the tunnel, balanced lateral part air current reduces the driving lateral part resistance, improves 16 cooling efficiency of cooler.

Both ends of cooling pipe group 23 all weld with base plate 27, and base plate 27 and the welding of oil box subassembly, cooling pipe group 23 pass through base plate 27 and oil box subassembly intercommunication, and the base plate 27 of cooler 16 is equipped with the hole all around, and mounting bracket 28 is equipped with the riveting nut in the relevant position offside, realizes through the bolt that base plate 27 and mounting bracket 28 are connected.

The pipeline assembly comprises a first pipeline 2, a second pipeline group 5 and a third pipeline group 7, wherein the first pipeline 2 is connected between the oil tank 18 and the oil pump 4 and is used for pumping the cooling oil 4 in the oil tank 18 out. The second pipeline group 5 consists of a large pipeline and two small pipelines, and hot oil passes through the large pipeline and then respectively enters the two small pipelines through the three-way pipe and then enters the two coolers 16. The third pipeline group 7 is composed of two small pipelines and a large pipeline, and the oil cooled by the cooler 16 passes through the two small pipelines and then is converged into the large pipeline through the three-way pipe. The fluid resistance of each pipeline part of the cooling system can be reasonably optimized through the combined design of the large and small pipelines and the three-way pipe, and the resistance of the whole oil way is reduced.

The second pipeline group 5 and the third pipeline group 7 form a parallel pipeline, so that the oil flow resistance of the system is effectively reduced, the lengths of all parts of the second pipeline group 5 and the third pipeline group 7 are consistent, the resistance of liquid flowing through is consistent, and the flow rates of oil flowing through the two coolers 16 are equal.

Referring collectively to fig. 4-6, in one embodiment, the oil box assembly includes a first oil box 29, a second oil box 30, and a third oil box 31, i.e., having three chambers. The cooling pipe group 23 comprises a plurality of rows of cooling pipe bodies 24 bent into an arc shape at preset gaps, the cooling pipe bodies 24 in each row are arranged in a coplanar manner, and the plane of the cooling pipe body 24 in each row is vertical to the travelling direction, so that the cooling pipe group 23 forms a plurality of channels parallel to the travelling direction, and travelling wind can pass through the channels; of course, in practical implementation, the cooling tube bodies 24 of each row may be arranged in a staggered manner, not in a plane, and the application is not limited thereto.

A plurality of reinforcing plates 26 are arranged between the cooling pipe bodies 24, and the plurality of reinforcing plates 26 are parallel to the driving direction and are arranged in the direction perpendicular to the driving direction, so that the overall strength of the cooling pipe group 23 can be increased, and the generation of large vibration in the operation process can be prevented.

The cooling tube group 23 further includes a first cooling tube group 231 composed of a plurality of cooling tube bodies 24 located at the front end in the traveling direction and a second cooling tube group 232 composed of a plurality of cooling tube bodies 24 located at the rear end in the traveling direction and arranged in parallel with the first cooling tube group 231, according to the connection with different oil tanks. The clearance between the first cooling tube group 231 and the second cooling tube group 232 is large, and the clearance of the first cooling tube group 231 or the second cooling tube group 232 is small compared to the cooling tube body 24, so that the wind resistance of the traveling wind entering the second cooling tube group 232 is reduced. Of course, in practical implementation, the gap between the first cooling tube bank 231 and the second cooling tube bank 232 may also be equal to the gap between the first cooling tube bank 231 or the second cooling tube bank 232 compared with the cooling tube body 24, which is not limited in this application.

The pipeline assembly conveys hot cooling oil from the oil tank 18 to the first oil box 29, the first oil box 29 conveys the hot cooling oil to the second oil box 30 through the first cooling pipe group 231 on the periphery, the hot cooling oil flows into the third oil box 31 through the second cooling pipe group 232 after being uniformly mixed in the second oil box 30, and the hot cooling oil flows back to the oil tank 18 from the third oil box 31 and the pipeline assembly. The arrangement obviously prolongs the cooling flow path of the cooling oil, can increase the contact path of the hot cooling oil and wind, and increases the cooling power. Each oil box is provided with a connecting flange 32 for connecting the pipe assembly via the flange 32.

The cooling tube body 24 may be a circular tube, a flat tube, an elliptical tube, etc., and is not limited herein. The gaps between the cooling pipe bodies 24 are gradually reduced along the inner circumference to the outer circumference, that is, the gaps between the rows of the cooling pipe bodies 24 on the inner circumference are larger, so that when the train runs, the hot air inside the cooler 16 and the cold air outside the cooler are fully exchanged and mixed in the middle of the cooling pipe group 23, and the improvement of the cooling power of the rear-end cooling pipe group is facilitated. Of course, in practical implementation, the cooling tube bodies 24 may also be disposed at equal intervals, which is not limited in this application.

In one embodiment, the central portion of the cooling tube group 23, i.e. the innermost cooling tube body 24, is further provided with a square tube 25 connected with the base plate 27, so as to disturb the middle traveling wind, increase the heat transfer effect of the cooling tube group 23, and increase the cooling power. The outside of the cooler 16 is provided with a grille-like protective cover 22 for preventing foreign matter such as stones under the vehicle from striking the cooler 16, the protective cover has a folded edge around the protective cover, the folded edge is provided with a hole, and a bolt penetrates through the hole on the folded edge to connect the protective cover 22 with the base plate 27, as shown in fig. 4 and 7.

The grid ribs of the protective cover 22 at the inlet and the outlet of the traveling wind are thin, the cross sections of the ribs are small, the size of the ribs along the traveling direction is long, and the strength of the grid is increased while the resistance of the traveling wind is reduced; meanwhile, the grid ribs at the bottom of the protective cover 22 close to the ground are more dense, the space between the grid ribs is increased along the upward direction, namely, the grid holes below the protective cover 22 are smaller in size, so that the protective effect is increased, the grid holes above the protective cover are larger in size, the resistance of the traveling wind entering the cooler 16 is reduced, and the protective effect on the cooler 16 and the wind resistance are both considered.

The hollow stopper/heat-dissipating protrusion 21 is provided above the cooler 16 on both sides to compensate for a gap between the cooler 16 and the vehicle underbody 15, preventing the wind inside the cooler 16 from entering the gap, while increasing the amount of wind entering the cooler 16 and increasing the heat-dissipating area. As shown in fig. 7, the cooling tube body 24 is provided with a reinforcing rib 241, the oil flow is disturbed by the reinforcing rib 241, the heat transfer effect is increased, the heat dissipation area of the oil side can be increased, the heat dissipation power is increased, and the miniaturization and light-weight design of the transformer and the cooler 16 is facilitated.

According to the application, the cooler 16 and the traction transformer body 3 are separately suspended, the cooler 16 is directly suspended on the vehicle body beam 6, the vehicle bottom limit 15 is fully utilized, the height size of the cooler 16 is increased, the heat dissipation area of the cooler 16 is further increased, and the power of the cooler 16 is improved. In specific implementation, the cooler 16 can be suspended from the beam 6 and can be directly mounted on two sides of the traction transformer body 3; or a group of coolers 16 are transversely installed and extended to two sides of the traction transformer body 3 directly as shown in fig. 10, so that the heat exchange area and the heat exchange efficiency are increased. The second pipeline group 5 and the third pipeline group 7 are both provided with metal corrugated pipes, the transformer is elastically suspended, the cooler 16 is in rigid connection with direct bolt connection, the metal corrugated pipes can absorb the displacement difference between the transformer and the cooler 16 in the operation process, and meanwhile, the vibration of the transformer is prevented from being transmitted to the cooler 16. Other equipment of the vehicle body beside the cooler assembly is more than 1m away from the cooling system in the traveling direction, so that the utilization rate of the cooler 16 to traveling wind at the bottom of the vehicle is increased.

In an embodiment, referring to fig. 9, the oil box assembly may further include a first oil box 29 and a second oil box 30, in which case, the first oil box 29 is communicated with the pipeline assembly and is used for receiving hot cooling oil, two ends of the cooling pipe group 23 are respectively communicated with the first oil box 29 and the second oil box 30, the cooling pipe group 23 cools the hot cooling oil and then delivers the cooled cooling oil to the second oil box 30, and the second oil box 30 delivers the cooling oil back to the oil tank 18 through the pipeline assembly.

The track traffic vehicle traction transformer assembly is designed skillfully and reasonably, the mounting space of the vehicle bottom limit 15 is matched, the traction transformer is cooled by utilizing the running wind around the vehicle bottom traction transformer when the vehicle runs, and the track traffic vehicle traction transformer assembly is suitable for vehicle bottom arrangement with complex flow field and wind speed distribution. Compared with the existing vehicle bottom arrangement traction transformer, the forced ventilation cooling fan can be eliminated, the noise of the transformer is greatly reduced, the efficiency of the transformer is improved, the consumption of the driving power of the fan is avoided, the maintenance and the replacement of a bearing are not required to be carried out on the fan, the cleaning period of the cooler 16 is prolonged, the maintenance operation is greatly reduced, the original fan protection device, the control logic and the like on a filter and a train can be eliminated, the arrangement and the control of the whole vehicle are simplified, the fault occurrence probability is reduced, the reliability of the whole vehicle and the traction transformer is improved, and the whole life cycle cost of the transformer is greatly reduced.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The rail transit vehicle traction transformer assembly provided by the application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A rail transit vehicle traction transformer assembly, comprising:

the traction transformer body is arranged at one end of the bracket assembly;

and the cooler assembly is suspended separately from the traction transformer body and extends to two sides of the bracket assembly, and is used for cooling oil in the traction transformer body in a circulating manner.

2. The rail transit vehicle traction transformer assembly of claim 1, wherein the bracket assembly comprises a first longitudinal beam and a cross beam, and a pair of the first longitudinal beams are used for being fixedly connected to two sides of the bottom of the vehicle along a driving direction; the pair of cross beams are perpendicular to the first longitudinal beam at a preset interval and connected to the first end of the first longitudinal beam;

the traction transformer body is fixed between the second ends of the first longitudinal beams, and the cooler assembly comprises a pair of coolers, a pipeline assembly and an oil pump, wherein the pipeline assembly is communicated with the coolers and the traction transformer body, and the oil pump is arranged in the pipeline assembly and used for pumping cooling oil; the pair of coolers are respectively fixed at two ends of the cross beam.

3. The rail transit vehicle traction transformer assembly according to claim 2, wherein the traction transformer body comprises a winding, an oil tank, an oil conservator, a high-voltage outgoing line, a low-voltage outgoing line, a pair of second longitudinal beams which are parallel to a traveling direction and located on two sides of the oil tank, and connecting rib plates which are arranged on two sides of the oil tank and connected with the oil tank and the second longitudinal beams, wherein the second longitudinal beams are welded with pin shafts, and the traction transformer body is mounted on the first longitudinal beams through the pin shafts.

4. The rail transit vehicle traction transformer assembly of claim 3, wherein the high voltage outgoing line, the low voltage outgoing line and the oil conservator are all arranged on the side face of the oil tank in the vertical driving direction; or the oil storage cabinet is arranged at the top of the oil tank.

5. The rail transit vehicle traction transformer assembly of any one of claims 2-4, wherein the cooler comprises a cooling tube bank, a base plate, an oil box assembly, and a mounting bracket; the cooling nest of tubes passes through the base plate intercommunication oil box subassembly, oil box subassembly include respectively with two at least cavitys of cooling nest of tubes both ends intercommunication, the pipeline subassembly intercommunication the oil feed end and the end of producing oil of cooler, just the pipeline subassembly still communicates respectively the different cavitys of oil box subassembly, the mounting bracket links firmly the base plate and install in the crossbeam.

6. The rail transit vehicle traction transformer assembly as claimed in claim 5, wherein the cooling tube set comprises a plurality of rows of cooling tube bodies bent at predetermined intervals in an arc shape, all the cooling tube bodies are arranged on a plane perpendicular to a driving direction, the cooling tube bodies located on the outer periphery are arranged in a limited manner to be attached to the bottom of a vehicle, and a reinforcing plate is connected between the adjacent cooling tube bodies.

7. The rail transit vehicle traction transformer assembly of claim 6, wherein a gap between any adjacent cooling tube bodies is tapered from an inner periphery to an outer periphery, and further comprising a square tube connected to the base plate and used for turbulence, the square tube being disposed at a center of the cooling tube body at the inner periphery.

8. The rail transit vehicle traction transformer assembly of claim 6, wherein the oil tank assembly comprises a first oil tank, a second oil tank, and a third oil tank, the cooling pipe set comprises a first cooling pipe set disposed at a front end and communicating the first oil tank with the second oil tank, and a second cooling pipe set disposed at a rear end and communicating the second oil tank with the third oil tank, and a gap between the first cooling pipe set and the second cooling pipe set is larger than a gap between the first cooling pipe set or the second cooling pipe set compared with the cooling pipe body; one end of the pipeline assembly, which is used for pumping the cooling oil in the cooler, is communicated to the third oil box.

9. The rail transit vehicle traction transformer assembly of claim 5, wherein the traction transformer body is resiliently suspended from the first longitudinal beam, and the piping component comprises a metal bellows for absorbing vibrational displacement of the traction transformer body.

10. The rail transit vehicle traction transformer assembly of claim 5, wherein the cooler is provided with a protective cover on the outside, and the top of the cooler is provided with a hollow stopper/heat dissipating protrusion for fitting the bottom of the vehicle.

11. The rail transit vehicle traction transformer assembly as claimed in claim 6, wherein the cooling tube body is provided with reinforcing ribs for turbulent flow therein.

12. The rail transit vehicle traction transformer assembly as claimed in claim 1, wherein the bottom of the traction transformer body is provided with a heat sink, and the extension direction of the heat sink coincides with the driving direction.