WO2014190688A1 - Cooling unit for traction system - Google Patents

Abstract

A cooling unit for a traction system comprises a bearing and supporting framework (1), an air filtering apparatus (2), a radiator (3), an air guide cylinder (4), a fan box body (5), an expansion water tank (6), a water pump (7), and a fan group (7), as well as a water system pipeline, an oil system pipeline, a pressure sensor and a temperature sensor, a wire junction box (10), an electric rapid connector (9) and another part. The water system pipeline and the oil system pipeline communicate with the radiator (3), and the pressure sensor and the temperature sensor are disposed on the pipelines. An integral matched design method is used on the cooling unit; a traction transformer cooling unit and a traction converter cooling unit are integrated into one unit, and on the premise of simultaneously meeting heat radiation requirements of the traction transformer and the traction converter, the cooling unit for a traction system brings a small size, a light weight, low in noise, a compact structure, high reliability, convenient mounting, and low maintenance and repair work load.

Description

 Cooling unit for traction system

Technical field

 The invention relates to the field of heat exchange technology, in particular to a cooling unit for a traction system. Background technique

 At present, the transformers in the traction system of electric locomotives at home and abroad are arranged in the equipment compartment of the trailer, and the converter is arranged in the equipment compartment of the locomotive. Correspondingly, the cooling unit of the traction transformer is arranged along with the transformer in the equipment compartment of the trailer. The traction converter cooling unit is arranged with the converter in the equipment compartment of the motor vehicle. Since the two cooling units are arranged in a distributed manner, each cooling unit requires separate radiators, air units, load-bearing support frames and the like, and the structure is not compact, the total volume is large, and the total weight is heavy.

 With the development of electric trains, the integration of traction systems can better meet the needs of train grouping flexibility. The integration of the traction system integrates the transformer, the converter and the cooling unit in the traction system, and simultaneously meets the heat dissipation requirements of the traction transformer and the traction converter with a single cooling unit. Summary of the invention

 According to the above-mentioned technical problems, the present invention overcomes the shortcomings of the prior art in order to meet the needs of the integration of the traction system, and provides a heat dissipation capability, high reliability, light weight, small volume, and auxiliary for railway transportation. Cooling unit for traction system with low power consumption, low noise, easy to use and maintain, and low running performance.

 The technical means adopted by the present invention are as follows:

 A cooling unit for a traction system includes a load bearing support frame, an air filter device, a radiator, a wind guide cylinder, a wind chamber body, an expansion water tank, a water pump, a wind unit, and an electrical quick connector fixed to the load bearing support frame and Junction box, which is characterized by:

The heat sink is fixed on the load-bearing support frame by a heat sink mount; the front side of the heat sink fixes the air filter device, the rear side of the heat sink fixes the air guide tube, and the air guide The cylinder is fixed to the wind casing body, and the wind casing body is fixed on the bearing support frame by a wind casing body mount; the fan group includes a fan motor and a fan mounted on a drive motor shaft of the fan motor An impeller and a deflector fixed to a front end of the fan impeller, the fan impeller and the deflector setting The fan motor is fixed on the bearing support frame in the accommodating cavity of the wind casing; the expansion water tank is connected to the water pump through a pipeline, and the expansion water tank and the water pump are fixed at the The load bearing support frame.

 Preferably, the load-bearing support frame comprises a main load-bearing beam, a main load-bearing longitudinal beam, an auxiliary load-bearing beam, an auxiliary load-bearing longitudinal beam and a column, and a connecting beam for connecting the column, wherein the main load-bearing beam and the main load-bearing longitudinal beam constitute a support frame for fixing the heat sink and the wind enclosure body, the auxiliary load beam is fixed between the main load rails, the auxiliary load rail is fixed to the main load beam and the auxiliary Between the load-bearing beams, the main load-bearing stringers are fixed to the uprights.

 The connecting beam connecting the fixed column mainly serves to strengthen the fixed oil-water pipeline; the cross-section of the main load-bearing beam, the main load-bearing longitudinal beam, the auxiliary load-bearing beam, and the auxiliary load-bearing longitudinal beam may be square, U Shape, zigzag, I-shape, triangle or deformation of the above several shapes, each beam can adopt different cross-sectional shapes, and the weight-reducing holes can be set on the beam as needed.

 The above-mentioned load-bearing support frame can appropriately increase or decrease the use of the above-mentioned beams according to actual needs, such as omitting the main load-bearing beam, and is not limited to the arrangement in the drawings.

 Preferably, the heat sink is a two-flow cross-flow heat sink, and the heat sink includes a heat-dissipating core water flow passage disposed on a windward side of the radiator core and a heat-dissipating core oil flow passage disposed on the air-side side, the heat-dissipating core An isolation seal is disposed between the water flow channel and the heat dissipation core oil flow channel, and the heat dissipation core water flow channel and the heat dissipation core oil flow channel share the same radiator core; the windward side of the radiator core is fixed to the air filter device On one side, the outlet side is the side fixed to the air guide cylinder;

 The inlet of the water-dissipating core water flow channel is provided with a water inlet cavity, the outlet of the heat-dissipating core water flow channel is provided with a water outlet cavity, and the inlet of the heat-dissipating core oil flow channel is provided with an oil inlet cavity, and the heat-dissipating core oil flow channel The outlet has an oil outlet. Depending on the water flow, the water flow path can be set in a single process, in a dual process or in multiple processes; depending on the oil flow, the oil flow path can be set in a single or dual process. The dual-flow differential counterflow heat sink utilizes different flow passages of the same heat dissipating core to achieve cooling of the two liquids, and has high heat dissipation capability, and the cooling unit is small in size, light in weight, and compact in structure.

 The coolant inlet is connected to the water pump through a water pump inlet pipe, and the water pump communicates with the water inlet chamber through a radiator inlet pipe, and the water outlet cavity communicates with the coolant outlet through the radiator outlet pipe; the cooling oil inlet The oil inlet pipe is connected to the oil inlet chamber through a radiator inlet pipe, and the oil discharge pipe is connected to the cooling oil outlet through a radiator oil discharge pipe, and a side is further disposed between the radiator oil inlet pipe and the radiator oil discharge pipe Through the pipeline.

Preferably, the air filter device is a two-stage air filter device, which is composed of a primary filter and a secondary filter. The first grade strainer is made of at least one of a stainless steel mesh, a stainless steel mesh or a filter cloth, and the stainless steel mesh or the stainless steel mesh has a side length or a diameter of 0.5 to 5 mm; Filtration accuracy requirements, different grades of filter cloth; stainless steel mesh, stainless steel wire mesh and filter cloth in a flat form or folded into a corrugated form; stainless steel mesh, stainless steel wire mesh and filter cloth can be stacked or combined. The fine filter element is made of a variable cross-section twisted profile or a hollow semi-cylindrical drawn profile. The two-stage air filter device greatly improves the filtration efficiency, reduces the dirt of the radiator, thereby reducing the number of times of cleaning the radiator of the cooling unit, and reducing the maintenance operation cost; at the same time, the two-stage filter device is optimized, air The flow resistance is low, the air circulation is smooth, the cooling unit has a strong heat dissipation capability, and the auxiliary power consumption is low.

 Preferably, the wind enclosure body adopts a polygonal wind enclosure body structure, that is, the wind enclosure body has a cross section perpendicular to an axis of the fan motor, and the outer shape thereof is an octagon, a hexagon, a rectangle, a circle or the above. The deformed structure of the shape, an arc transition can be set between each side;

 The lower end of the wind enclosure body is provided with an air outlet, a longitudinal partition plate is arranged in the air intake body direction, and a horizontal partition plate is arranged perpendicular to the intake air flow direction; between the partition plate and the wind casing body Connected by splicing, riveting or bolting. A deflector for fan air intake is provided on the lateral divider. This polygonal wind casing reduces vortex generated by air in the tank and reduces aerodynamic noise.

 Preferably, the air guiding cylinder is a gradual air guiding cylinder, and includes an air inlet flange, an air outlet flange and a transition cylinder. According to the specific structure of the radiator and the polygonal wind casing body, the shape of the transition cylinder is set, and the transition cylinder can adopt different deformation modes such as divergent deformation, tapered deformation, divergence and tapered mixing deformation.

 Preferably, the expansion water tank is composed of a special-shaped box body, a liquid level sensor, a liquid level meter, a pressure regulating valve, a quick drain valve and a pipe joint; and the special-shaped box body can be according to the space size of the cooling unit under a certain volume condition Deformation, all equipment arrangements are realized in a limited space, making the cooling unit structure more compact. The liquid level sensor adopts a double float liquid level control valve. When the water level in the expansion water tank drops to the upper water level float ball, an alarm signal is issued; when the water level in the expansion water tank drops to the lower water level float ball, a cutoff signal is issued, which effectively ensures the change. The water flow in the power module of the flow device is sufficient to ensure good heat dissipation and safe operation of the module.

Preferably, a metal rubber shock absorber is disposed between the water pump and the load bearing support frame and/or the expansion water tank and the load bearing support frame, and the metal rubber shock absorber comprises 2 sets of metal parts and 1 set. The rubber body is composed of two sets of metal parts connected by rubber, wherein one set of metal part flange plates is connected with the hanging plate of the water pump, the hanging plate of the water pump and the main load-bearing longitudinal beam and the auxiliary load-bearing longitudinal direction The beam is connected, and another set of metal flange plates is connected to the water pump or the expansion water tank or the fan motor. This kind of setting effectively reduces the influence of the vibration of the vehicle body on the equipment related to the cooling unit, and ensures the life of the equipment; The vibration of the fan is transmitted to the vehicle body to ensure passenger comfort. The water pump of the present invention can adopt a shielded electric pump, which has the advantages of large flow rate, high lift, low noise and the like.

 Preferably, the water pump inlet pipe, the radiator inlet pipe, the radiator outlet pipe, the radiator inlet pipe and the radiator oil discharge pipe are respectively provided with a bellows expansion joint; the radiator inlet and the outlet A butterfly valve is arranged at the flange of the radiator inlet and outlet ports; a water system filter is also arranged on the radiator outlet pipe. According to the need to set the filter accuracy, the water system filter can ensure that the water quality is clean without excessive impurities, thus ensuring smooth flow of water in the water-cooled substrate of the converter power module, uniform flow rate, good heat dissipation, and finally ensuring the normal operation of the power module, safe and reliable operation of the train . The bellows expansion joint is used to compensate for the manufacturing and installation errors of the various components of the water system, to avoid additional stress on the system components and to ensure system reliability. The function of the butterfly valve is to close the butterfly valve when the radiator leaks, to minimize the loss of coolant, to facilitate maintenance, and to reduce maintenance costs.

 Preferably, the water pump inlet pipe and the radiator outlet pipe are further provided with a pressure sensor and a temperature sensor. When the system pressure or temperature exceeds the specified value, the pressure sensor and temperature sensor will give an alarm or cut off signal to ensure that the converter works under safe working conditions.

 In addition, the fan motor and the water pump motor power line of the present invention may be connected to the expansion tank liquid level sensor signal line, the temperature sensor signal line and the pressure sensor signal line respectively to different connectors or junction boxes; the fan motor and the water pump The motor power cable can also be connected to the same connector or junction box with the expansion tank level sensor signal line, temperature sensor signal line and pressure sensor signal line. At this time, the signal line is effectively shielded.

 When the cooling unit of the present invention is in operation, the coolant in the inner cavity of the water-cooling substrate of the converter power module flows under the action of the water pump to the inlet chamber of the cooling channel double-flow cross-flow radiator, and enters the upper channel of the water channel in the radiator core. After passing through the upper water channel of the radiator core and returning to the lower water channel of the radiator core through the back water return chamber, the cooled coolant is collected in the radiator water outlet cavity and returned to the converter power module water-cooled substrate through the radiator outlet pipe. At the same time, the cooling oil in the transformer tank flows under the action of the oil pump to the oil inlet chamber of the dual-channel cross-flow radiator of the cooling unit, enters the oil flow passage in the radiator core, and the cooled oil is collected in the radiator oil discharge chamber. After that, return to the transformer tank through the pipeline.

The fan motor rotates, driving the fan impeller (the fan impeller can adopt the centrifugal fan impeller) to rotate, attracting the external ambient air into the air filter device at the front end of the cooling unit, and the clean air flowing through the two stages flows to the double-flow cross-flow radiator. During the process of cooling air passing through the radiator core, the heat of the cooling liquid of the converter water system in the radiator core water channel is absorbed, and then the heat of the transformer oil in the radiator core oil passage is absorbed, and the cooling air is then passed through the gradual air guiding cylinder. , wind chassis, wind unit, in the wind Under the action of the impeller, the airflow is rotated 90 degrees and then blown vertically to the rail surface. The cooled liquid flows back to the converter and transformer under the action of the pump to complete the cooling of the electrical components.

 The fan group provided by the invention can be selected from a voluteless centrifugal fan set, which is composed of the above-mentioned deflector, fan impeller, fan motor and connecting piece, and the centrifugal fan impeller adopts a large arc-shaped front plate, a rear curved blade and a rear plate. It is connected by splicing, with high air flow, high efficiency, low noise and high reliability.

 The present invention can increase or decrease the above-described components as needed, and can also change the connection manner and position between the components.

 Compared with the prior art, the heavy components of the cooling unit of the present invention, such as the radiator, the wind casing body, and the fan motor, are independently connected to the supporting support frame, so that the body of the wind casing is not carried, and the wind body is reduced. The direct transmission of motor vibration to the wind casing prevents the cracking of the wind casing. In addition, the bypass line between the radiator inlet and outlet lines ensures that the pressure loss of the entire oil system is properly matched with the pump head, ensuring that the total oil flow of the oil system is within the design allowable range, thus ensuring the transformer. The internal oil flow meets the heat dissipation requirements.

 The cooling unit of the present invention can be applied to an integrated traction system. The cooling unit of the present invention adopts an overall matching design method, and integrates the traction transformer cooling unit and the traction converter cooling unit in the same unit, and simultaneously satisfies the traction transformer, Under the premise of heat dissipation requirements of the traction converter, it is small in size, light in weight, low in noise, compact in structure, high in reliability, easy to install, and small in maintenance and repair work. These features provide a new technology for rail transit mobile equipment cooling systems. DRAWINGS

 The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of the structure of the present invention I.

 Figure 2 is a schematic view II of the structure of the present invention.

 Figure 3 is a left side view of the present invention.

In the figure: 1. Bearing support frame 101, main load beam 102, main load rail 103, auxiliary load beam 104, auxiliary load rail 105, column 2, air filter device 3, radiator 301, water inlet chamber 302, back The water chamber 303, the oil inlet chamber 304, the oil outlet chamber 305, the radiator inlet pipe 306, the radiator outlet pipe 307, the radiator inlet pipe 308, the radiator outlet pipe 309, the bypass pipe 310, the water system filter 311, Butterfly valve 312, bellows expansion joint 313, radiator mount 314, water outlet chamber 4, air guide cylinder 5, wind chamber body 501, wind chamber body mount 6, expansion water tank 7, water pump 701, water pump inlet pipe 702, metal rubber minus Shock absorber 8, wind unit 801, fan motor 802, fan impeller 803, a deflector 9, an electrical quick connector 10, a junction box;

 A. Coolant inlet B, coolant outlet C, cooling oil inlet D, cooling oil outlet E, intake air flow direction F, air outlet Specific implementation

 As shown in FIG. 1 to FIG. 3, a cooling unit for a traction system includes a supporting support frame 1, an air filtering device 2, a radiator 3, an air guiding cylinder 4, a wind casing body 5, an expansion water tank 6, a water pump 7, and a wind. The unit 8 and the electrical quick connector 9 and the junction box 10 are fixed to the carrying support frame 1.

 The load-bearing support frame 1 comprises two main load-bearing beams 101, two main load-bearing longitudinal beams 102, one auxiliary load-bearing beam 103, one auxiliary load-bearing longitudinal beam 104 and four columns 105 for ensuring the strength of the cooling unit. The main load-bearing beam 101 and the main load-bearing longitudinal beam 102 constitute a rectangular support frame for fixing the heat sink 3 and the wind box body 5, and the auxiliary load-bearing beam 103 is fixed between the main load-bearing longitudinal beams 102 The auxiliary load-bearing longitudinal beam 104 is fixed between the main load-bearing beam 101 and the auxiliary load-bearing beam 103. The main load-bearing longitudinal beam 102 is fixed to the vertical column 105, and the two vertical columns 105 are also connected between The connecting beam of the fixed oil-water pipe is strengthened. As shown in FIG. 1, the electrical quick connector 9 and the junction box 10 are fixed to the column 105.

 The air filter device 2 is a two-stage air filter device, which is composed of a primary filter and a secondary fine filter. The primary filter is made of a corrugated stainless steel mesh having a diameter of 1 mm; the fine filter is used. The cross-section twisted aluminum profile is drawn.

 The heat sink 3 is a dual-flow cross-flow heat sink, and the heat sink 3 includes a heat-dissipating core water flow passage disposed on the windward side of the radiator core and a heat-dissipating core oil flow passage disposed on the air-side side, the heat-dissipating core water flow An isolation seal is disposed between the channel and the heat dissipating core oil flow passage, and the heat dissipating core water flow path and the heat dissipating core oil flow path share the same radiator core; and the inlet of the heat dissipating core water flow channel is provided with a water inlet chamber 301, the outlet of the heat-dissipating core water flow channel is provided with a water outlet chamber 314, the inlet of the heat-dissipating core oil flow channel is provided with an oil inlet chamber 303, and the outlet of the heat-dissipating core oil flow channel is provided with an oil outlet chamber 304;

 The coolant inlet A communicates with the water pump 7 through a water pump inlet pipe 701, and the water pump 7 communicates with the water inlet chamber 301 through a radiator inlet pipe 305, and the water outlet chamber 314 passes through the radiator outlet pipe 306 and is cooled. The liquid outlet B is connected to each other;

The cooling oil inlet C communicates with the oil inlet chamber 303 through a radiator inlet pipe 307, and the oil outlet chamber 304 communicates with the cooling oil outlet D through a radiator oil outlet pipe 308, the radiator inlet pipe 307 and the A bypass line 309 is also provided between the radiator oil discharge pipes 308. The air guiding cylinder 4 is a gradual air guiding cylinder, and includes an air inlet flange, an air outlet flange and a transition tube.

 The wind chamber body 5 is in a cross section perpendicular to the axis of the fan motor 801, and its outer shape is an octagonal shape, a hexagonal shape, a rectangular shape, a circular shape or a deformed structure of the above shape, and a circle may be disposed between each side Arc-transition; the lower end of the wind casing body 5 is provided with an air outlet F, and a longitudinal partition plate is arranged in the air-flow direction E in the wind-chamber body 5, and a horizontal partition plate is arranged perpendicular to the direction of the intake air flow. The deflector 803 is disposed on the lateral partition plate.

 The expansion water tank 6 is composed of a special-shaped box body, a liquid level sensor, a liquid level meter, a pressure regulating valve, a quick drain valve and a pipe joint; the liquid level sensor adopts a double float liquid level control valve, when the water level in the expansion water tank 6 drops to When the water level floats, an alarm signal is issued; when the water level in the expansion tank 6 drops to the lower level float, a cutoff signal is issued.

 The heat sink 3 is fixed on the main load rails 102 of the load-bearing support frame 1 through a radiator mount 313; the front side of the heat sink 3 fixes the air filter device 2, and the rear of the heat sink 3 The air guiding cylinder 4 is fixed to the side, the air guiding cylinder 4 is fixed to the wind casing body 5, and the wind casing body 5 is fixed to the main bearing longitudinal beam of the supporting support frame 1 by the wind casing body mounting seat 501. The fan unit 8 includes a fan motor 801, a fan impeller 802 mounted on a drive motor shaft of the fan motor 801, and a deflector 803 fixed to a front end of the fan impeller 802, the fan impeller 802 and The deflector 803 is disposed in the accommodating cavity of the wind casing body 5, and the fan motor 801 is fixed on the auxiliary load beam 103 of the load bearing support frame 1; the expansion water tank 6 passes through the pipeline and the The water pump 7 is in communication, and the expansion water tank 6 and the water pump 7 are both fixed to the load-bearing support frame 1. A metal rubber shock absorber 702 is disposed between the water pump 7 and the load bearing support frame 1, the expansion water tank 6, and the load bearing support frame 1. The metal rubber shock absorber 702 is composed of 2 sets of metal parts and 1 set of rubber body, 2 sets of metal parts are connected by rubber, wherein 1 set of metal piece flange plates are connected with the hanging plate of the water pump 7, the hanging plate of the water pump 7 and the main load-bearing longitudinal beam 102 and The auxiliary load rails 104 are connected, and the other set of metal flange plates are connected to the water pump 7 or the expansion water tank 6 or the fan motor 801.

 Wherein, the water pump inlet pipe 701, the radiator inlet pipe 305, the radiator outlet pipe 306, the radiator inlet pipe 307 and the radiator oil discharge pipe 308 are respectively provided with a bellows expansion joint 312; A butterfly valve 311 is disposed at the flanges of the inlet and outlet of the radiator and the inlet and outlet of the radiator; and the water outlet filter 306 is further provided with a water system filter 310. A pressure sensor and a temperature sensor are further disposed on the water pump inlet pipe 701 and the radiator outlet pipe 306.

When the cooling unit is working, the coolant in the inner cavity of the water-cooling substrate of the converter power module flows under the action of the water pump 7 to the water inlet chamber 301 of the dual-channel cross-flow radiator 3 of the cooling unit, and enters the water flow in the radiator core. The upper water channel of the channel passes through the upper water channel of the radiator core and returns to the lower water channel of the radiator core through the rear return water chamber 302. The cooled coolant is collected in the radiator water outlet chamber 314 and then returned to the converter through the radiator outlet pipe 306. Power module water cooled substrate. At the same time, the cooling oil in the transformer tank flows to the cooling chamber double-flow cross-flow radiator 3 into the oil chamber 303 under the action of the oil pump, enters the oil passage in the radiator core, and the cooled oil is discharged from the radiator. The chambers 304 are collected and returned to the transformer tank through the radiator outlet pipe 308.

 The air unit 8 adopts a voluteless centrifugal fan group, and the fan motor 801 rotates to drive the fan impeller 802 to rotate, attracting external ambient air into the air filter device 2 at the front end of the cooling unit, and the clean air flowing through the two stages is filtered to the double flow path cross flow. The radiator 3, in the process of cooling the air passing through the radiator core, absorbs the heat of the cooling liquid of the converter water system in the radiator water channel, and then absorbs the heat of the transformer oil in the radiator core oil passage, and then the cooling air is successively After the gradual air guiding cylinder 4, the wind casing body 5, and the air unit 8, the airflow is rotated 90 degrees under the action of the fan impeller 802, and then blown vertically to the rail surface. The cooled liquid flows back to the converter and transformer under the action of the pump to complete the cooling of the electrical components.

 The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention Equivalent substitutions or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims

Claims 1. A cooling unit for a traction system, comprising a supporting support frame (1), an air filtering device (2), a radiator (3), a wind guiding cylinder (4), a wind casing body (5), an expansion water tank (6) , water pump (7), air unit (8) and an electrical quick connector (9) and a junction box (10) fixed to the carrying support frame (1), characterized in that:  The heat sink (3) is fixed on the load bearing support frame (1) through a heat sink mount (313); the air filter device (2) is fixed on a front side of the heat sink (3), the heat dissipation The air guiding cylinder (4) is fixed to the rear side of the device (3), the air guiding cylinder (4) is fixed to the wind casing body (5), and the wind casing body (5) passes through the wind casing body mount (501) fixed to the load bearing support frame (1); the fan unit (8) includes a fan motor (801), a fan impeller (802) mounted on a drive motor shaft of the fan motor (801), and a deflector (803) fixed to a front end of the fan impeller (802), the fan impeller (802) and the deflector (803) being disposed in a receiving cavity of the wind casing body (5) The fan motor (801) is fixed on the load bearing support frame (1); the expansion water tank (6) is connected to the water pump (7) through a pipeline, the expansion water tank (6) and the water pump ( 7) Both are fixed on the load-bearing support frame (1). 2. The cooling unit for a traction system according to claim 1, wherein: the load bearing support frame (1) comprises a main load beam (101), a main load rail (102), an auxiliary load beam (103), An auxiliary load bearing longitudinal beam (104) and a vertical column (105) and a connecting beam for connecting the vertical column (105), the main load bearing beam (101) and the main load bearing longitudinal beam (102) are configured to fix the heat sink (3) and a support frame of the wind enclosure (5), the auxiliary load beam (103) is fixed between the main load rails (102), and the auxiliary load rail (104) is fixed at the Between the main load beam (101) and the auxiliary load beam (103), the main load rail (102) is fixed to the column (105). 3. The cooling unit for a traction system according to claim 1, wherein: the radiator (3) is a two-flow cross-flow radiator, and the radiator (3) is disposed on a windward side of the radiator core. a heat dissipating core water flow channel and a heat dissipating core oil flow path disposed on the air outlet side, wherein the heat dissipating core water flow path and the heat dissipating core oil flow path are provided with an isolating seal, the heat dissipating core water flow path and the heat dissipating core The oil flow channels share the same radiator core; The inlet of the heat dissipating core water channel is provided with a water inlet chamber (301), and the outlet of the heat dissipating core water channel is provided There is a water outlet (314), an inlet of the heat dissipation core oil passage is provided with an oil inlet chamber (303), and an outlet of the heat dissipation core oil passage is provided with an oil discharge chamber (304);  The coolant inlet (A) is in communication with the water pump (7) through a water pump inlet pipe (701), and the water pump (7) is connected to the water inlet chamber (301) through a radiator inlet pipe (305). The water chamber (314) is connected to the coolant outlet (B) through the radiator outlet pipe (306);  The cooling oil inlet (C) is in communication with the oil inlet chamber (303) through a radiator inlet pipe (307), and the oil discharge chamber (304) is connected to the cooling oil outlet (D) through a radiator oil outlet pipe (308) A bypass line (309) is further disposed between the radiator inlet pipe (307) and the radiator oil outlet pipe (308). 4. The cooling unit for a traction system according to claim 1, wherein: the air filtering device (2) is a two-stage air filtering device, and is composed of a primary primary filter and a secondary fine filter, the primary primary filter. The material is at least one of stainless steel mesh, stainless steel mesh or filter cloth. The length or diameter of the stainless steel mesh or stainless steel wire mesh is 0.5~5mm; the stainless steel mesh, stainless steel mesh and filter cloth are flat. Form or corrugated form; the fine filter element is made of a variable cross-section twisted profile or a hollow semi-cylindrical drawn profile. The cooling unit for a traction system according to claim 1, characterized in that: the wind casing body (5) has an outer shape of an octagonal shape on a section perpendicular to an axis of the fan motor (801) a hexagonal shape, a rectangle, a circle, or a deformed structure of the above shape, and an arc transition may be set between each side;  The lower end of the wind casing body (5) is provided with an air outlet (F), and a longitudinal partition plate is arranged in the air casing body (5) along the direction of the intake air flow (E), and the horizontal direction is perpendicular to the direction of the intake air flow. A partition plate, the deflector (803) is disposed on the lateral partition plate. 6. The cooling unit for a traction system according to claim 1, wherein: the air guiding cylinder (4) is a gradual air guiding cylinder, and includes an air inlet flange, an air outlet flange and a transition tube. 7. The cooling unit for a traction system according to claim 1, wherein: said expansion water tank (6) is composed of a shaped box, a liquid level sensor, a liquid level meter, a pressure regulating valve, a quick drain valve and a pipe joint. The liquid level sensor adopts a double float liquid level control valve. When the water level in the expansion water tank (6) drops to the upper water level float, an alarm signal is issued; when the water level in the expansion water tank (6) drops to the lower water level float, it is issued. Cut off the signal. The cooling unit for a traction system according to claim 2, characterized in that the water pump (7) and the load-bearing support frame (1) and/or the expansion water tank (6) and the load-bearing support frame (1) A metal rubber shock absorber (702) is provided between the two sets of metal parts and one set of rubber body, and two sets of metal parts are connected by rubber, wherein A set of metal flange plates is connected to the suspension plate of the water pump (7), and a lifting plate of the water pump (7) is connected to the main load rail (102) and the auxiliary load rail (104), A set of metal flange plates is connected to the water pump (7) or the expansion water tank (6) or the fan motor (801). 9. The cooling unit for a traction system according to claim 1, wherein: said water pump inlet pipe (701), said radiator inlet pipe (305), said radiator outlet pipe (306), said A bellows expansion joint (312) is respectively disposed on the radiator inlet pipe (307) and the radiator oil outlet pipe (308); a butterfly valve is arranged at the flange of the radiator inlet and outlet ports and the radiator inlet and outlet ports (311); a water system filter (310) is further disposed on the radiator outlet pipe (306). 10. The cooling unit for a traction system according to claim 1, wherein: the water pump inlet pipe (701) and the radiator outlet pipe (306) are further provided with a pressure sensor and a temperature sensor.