CN115942713A - Cooling system of battery power locomotive - Google Patents

Abstract

The invention relates to the field of heat exchange of a battery converter, in particular to a battery power locomotive cooling system, which comprises a radiator, a resistance cooler, a water-cooling substrate, a centrifugal fan and an ambient temperature controller, wherein the radiator is arranged on the radiator; the heat dissipation of a resistor, a transformer and a reactor in the converter is realized while the heat dissipation of a power device (a diode and an IGBT) by a traditional cooling system is met, and the environmental temperature in the converter is controlled to meet the working requirements of components. The scheme of the invention is generally divided into a water cooling part, an air cooling part and an environment temperature control part. The water cooling part is divided into power device water cooling and resistance water cooling; the air cooling part comprises forced air cooling of cooling liquid of the water cooling part and forced air cooling of a transformer and a reactor; the ambient temperature control part is used for cooling the ambient air in the converter cabinet. Under the requirement of meeting the design of the inner seal of the converter, the heat dissipation of a plurality of parts is realized, the cooling effect is good, the operation reliability of the converter is improved, and the safety of the converter is ensured.

Description

Cooling system of battery power locomotive

Technical Field

The invention relates to the field of heat exchange of a battery converter, in particular to a cooling system of a battery power locomotive.

Background

With the rapid development of rail transit, the importance degree on the operation safety of the locomotive is higher. The locomotive converter needs to be sealed so as to reduce dust in a converter cabinet and improve the operation reliability of the converter. The design of the converter seal will affect the ventilation and heat dissipation effects of the components. In order to ensure the heat dissipation requirement of components in the converter, the temperature rise of the components is controlled within the design range, and a cooling system is required to be designed.

The cooling system of the existing converter only aims at heat dissipation of a power device generally, a water circulation air cooling mode is adopted, heat generated by the power device is absorbed to cooling liquid through circulation of the cooling liquid, and then the heat of the cooling liquid is dissipated to air through forced air cooling of a fan on a radiator. There are the following disadvantages: the existing cooling system only considers the heat dissipation requirement of a power device and cannot meet the heat dissipation requirements of other parts needing heat dissipation in the converter and the environment in the converter.

Disclosure of Invention

The invention provides a battery power locomotive cooling system, which aims to solve the problems that the prior art is low in heat dissipation efficiency due to the sealing of a battery converter, cannot meet the heat dissipation requirement of the battery converter, only solves the heat dissipation requirement of a power device, cannot meet other heat dissipation requirements and the like, and realizes the control of environmental temperature in the power device (diode and IGBT), a resistor, a transformer, a reactor and the converter of the converter.

The invention is realized by the following technical scheme: a battery power locomotive cooling system comprises a radiator, wherein a liquid inlet of the radiator is connected with a liquid outlet of a resistance cooler through a pipeline, and a liquid inlet of the resistance cooler is connected with a liquid inlet main pipeline; a liquid outlet of the radiator is hermetically connected with a liquid inlet of the water pump through a pipeline (the radiator distributes the temperature of the cooling liquid in the pipeline to the environment through a plurality of flow passages or fins in the radiator to reduce the temperature of the cooling liquid), and the liquid outlet of the water pump is hermetically connected with a main liquid outlet pipeline; a plurality of water-cooling substrates are connected in parallel between the liquid inlet main pipeline and the liquid outlet main pipeline through first branch pipelines respectively (the number of the water-cooling substrates can be adjusted according to the number of power devices, and power devices such as diodes and IGBTs are installed on the outer sides of the water-cooling substrates), a serpentine channel is arranged in each water-cooling substrate, and flow guide ports at two ends of each serpentine channel are in butt joint with a liquid inlet and a liquid outlet of each water-cooling substrate respectively; the liquid inlet main pipeline and the liquid outlet main pipeline are respectively connected with a bottom water vapor connector of an expansion water tank positioned at the highest position through a stainless steel thin pipeline and an expansion water tank (the expansion water tank has the function that gas possibly generated in the water circulation process is discharged to the expansion water tank through the stainless steel thin pipeline by utilizing the principle that the air density is lower than that of cooling liquid and flows upwards; a water temperature sensor and a water pressure sensor are arranged at a liquid outlet of the water pump on the liquid outlet main pipeline, and the water pressure sensor and the water temperature sensor are connected with a traction control unit of the converter (when the water pressure sensor and the water pressure sensor detect that the water pressure is abnormal and exceeds a specified threshold value, the traction control unit can send out a protection instruction, such as power reduction, shaft separation, shutdown and the like, so that the operation of the converter is protected, and the occurrence of related faults of the converter caused by the abnormality of a cooling system is avoided); the resistance cooler (the resistance cooler is used for meeting the heat dissipation requirement of resistance devices in the converter) comprises a heat dissipation cavity, wherein a front end flange is fixedly arranged at the front end inlet of the heat dissipation cavity, a transition pipeline is fixedly arranged at the rear end outlet of the heat dissipation cavity, and a rear end plane flange is fixedly arranged at the end part of the transition pipeline; the heat dissipation cavity is formed by splicing a heat dissipation substrate and a cover plate; a plurality of rectangular ribs are fixedly arranged on the inner side wall of the heat dissipation substrate in parallel from bottom to top, intervals are reserved between the two ends of each rectangular rib and the front end face and the rear end face of the inner cavity of the heat dissipation cavity, and the rectangular ribs are horizontally arranged; a plurality of micro ribs are fixedly arranged on the inner side wall of the radiating substrate between adjacent rectangular ribs from bottom to top in parallel, a plurality of micro ribs are also fixedly arranged on the inner side wall of the radiating substrate positioned on the uppermost rectangular rib from bottom to top in parallel, and similarly, a plurality of micro ribs are also fixedly arranged on the inner side wall of the radiating substrate positioned on the lowermost rectangular rib from bottom to top in parallel, and the micro ribs are parallel to the rectangular ribs; a plurality of triangular wing plates for generating vortex are horizontally and fixedly arranged between all the adjacent micro ribs; the radiating substrate lateral wall is provided with a plurality of preformed holes that are used for installing resistance class device, the heat dissipation cavity sets firmly on the feed liquor main pipeline through front end flange and rear end plane flange is sealed.

During actual operation, the water pump continuously operates, under the effect of water pump, coolant liquid (coolant liquid can be water, the mixed liquid or single liquid that possesses good heat dispersion such as ethylene glycol) gets into resistance cooler from the feed liquor main line, the rectangle rib that sets up on resistance cooler's the radiating basal plate, the heat transfer area between miniature rib increase cooling liquid and the radiating basal plate, arrange triangle wing plate in the miniature rib passageway, triangle wing plate not only can change the flow direction of liquid in the passageway can also effectively strengthen the heat transfer effect between miniature rib and the fluid in the passageway, its mechanism of strengthening the heat transfer is following three aspects: firstly, the triangular wing plates are arranged among the miniature ribs, so that the contact area between the miniature ribs and liquid can be expanded, and the heat exchange performance between the miniature ribs and the fluid is enhanced; secondly, the triangular wing plates arranged among the micro ribs can effectively damage a flow boundary layer and a heat boundary layer on the surfaces of the micro ribs in the area, so that the heat exchange capacity between the micro ribs and fluid is enhanced; the actual triangular wing plate adopts a right-angle triangular plate, and the right-angle surface is arranged towards the upstream surface. The vertical surface of the triangular wing plate arranged in the micro channel is a stream-facing surface, so that the flow state of liquid is changed, longitudinal vortexes are generated in the incoming flow direction, the surface of the heat dissipation cavity is scoured by the longitudinal vortexes, the heat exchange capacity of the liquid is further enhanced, and the dead vortexes caused by vortex generators can be eliminated by the inclined surface of the triangular wing plate serving as the tail vortexes. The coolant liquid rises from the liquid outlet outflow temperature of resistance radiator, get into in the radiator, the temperature of coolant liquid distributes to the environment in a plurality of runners in the radiator, the temperature of coolant liquid reduces, get into water pump and play water trunk line, the coolant liquid gets into the water-cooling base plate that is located on the lateral line from going out the liquid main line after that, under the water conservancy diversion effect of the snakelike runner in the water-cooling base plate, increase the heat radiating area of coolant liquid and water-cooling base plate, the design of arranging according to power device's size in the distribution position of snakelike runner, make it satisfy power device's heat dissipation demand. The expansion tank is used for ensuring that the water pressure of the whole system is kept at a set value. When the cooling liquid in the liquid inlet and outlet main pipelines expands, part of the cooling liquid and gas enter the expansion water tank from the water-gas connecting port at the bottom of the expansion water tank through the stainless steel thin pipeline.

Preferably, the air cooling system further comprises an air cooling unit, the air cooling unit comprises a casing, a first support frame and a second support frame are respectively installed at the upper part and the middle part in the casing, the radiator is installed on the second support frame at the middle part, a centrifugal fan is assembled on the first support frame positioned at the upper part in the casing, an air inlet formed in the rear side of the casing corresponds to an air inlet of the centrifugal fan, a flow guide cover is assembled below the second support frame, two air guide channels are arranged in the flow guide cover in parallel, a transformer and a reactor are arranged at the bottom in the casing, two air outlets are formed in a bottom plate of the casing, the transformer and the reactor correspond to the respective air guide channels above and the respective air outlets below the transformer and the reactor, temperature sensors are pre-embedded in the transformer and the reactor and are connected with a traction control unit of the converter (the temperature sensors detect the internal temperatures of the transformer and the reactor and transmit the signals to the traction control unit, the traction control unit processes and judges the received signals, and when a set threshold value is exceeded, a protection instruction is sent to control the converter to perform protection action, such as power reduction, shaft separation, shutdown or shutdown.

During actual operation, the centrifugal fan is started, external air is sucked into the upper portion of the shell from an air inlet in the rear side of the shell under the action of the centrifugal fan and continuously conveyed downwards to pass through the first supporting frame, air cooling heat dissipation is carried out on the surface of the radiator by the external air, so that cooling liquid in the radiator can be rapidly cooled, the heat of the cooling liquid in the radiator is taken away by cold air of the radiator, and the cooling liquid in a water cooling part is continuously circulated in a pipeline after the temperature of the cooling liquid is reduced; outside air passes through the radiator and then enters the lower portion of the shell from the second supporting frame below the radiator, and under the action of the air guide sleeve, outside cold air is aligned to a coil gap between the transformer and the reactor arranged below the shell, so that the cooling effect of the air guide sleeve is improved, and the heat dissipation requirements of the transformer and the reactor in the converter are met.

Further preferably, the system also comprises an environment temperature controller and an environment temperature sensor, wherein the environment temperature controller comprises a heat absorption water tank, a fan is installed on the heat absorption water tank, and a liquid inlet and a liquid outlet of the heat absorption water tank are respectively connected with the liquid inlet main pipeline and the liquid outlet main pipeline through second branch pipelines; the environment temperature sensor is arranged at a liquid inlet of the liquid inlet main pipeline close to the resistance cooler and is connected with the traction control unit of the converter. ( A plurality of flow channels are arranged in the heat absorption water tank, and the fan is connected with the direct current end of the converter power supply through a connector; the temperature at the position is the place with higher environment temperature inside the converter cabinet body, and the inside environment temperature can be monitored and controlled in time )

In actual operation, the fan is turned on, hot air in the converter cabinet is blown to the heat absorption water tank under the action of the fan, the cooling liquid flows into the plurality of flow channels in the heat absorption water tank, the heat absorption areas of the cooling liquid and the side wall of the heat absorption water tank are increased through the flow channels, and the cooling liquid flowing through the heat absorption water tank absorbs heat of the hot air, so that the ambient temperature in the converter is reduced, and the control of the internal ambient temperature is met. The temperature sensor in the converter is arranged in a region with higher temperature in the converter, detects the ambient temperature in the converter and feeds the ambient temperature back to the traction control unit, and the traction control unit processes and judges the received signals and sends out a protection instruction when the ambient temperature exceeds a required value.

Further preferably, the front end of the liquid inlet main pipeline and the tail end of the liquid outlet main pipeline are respectively provided with an exhaust valve. The front end of the liquid inlet and outlet main pipeline can be a liquid inlet section, the tail end of the liquid inlet main pipeline is a liquid outlet end, the front end of the actual liquid inlet main pipeline and the tail end of the liquid outlet main pipeline are in a closed state, cooling liquid circularly flows in the system, exhaust valves are respectively arranged at the front end and the tail end of the loop, the exhaust valves are used for manually exhausting, and gas possibly accumulated at the tail end of the pipeline is exhausted when the liquid is injected into the water cooling system.

Preferably, the first branch pipeline is hermetically connected with the water-cooling substrate, and the heat absorption water tank of the ambient temperature controller is hermetically connected with the second branch pipeline through quick connectors. As known to those skilled in the art, the quick coupling has a self-sealing function, when the quick coupling is connected with the water-cooling pipeline branch pipe joint, the inside of the quick coupling is in a conducting state, the internal cooling liquid can circulate, and when the quick coupling is disconnected with the water-cooling pipeline branch pipe joint, the inside of the quick coupling is in a stopping state, and the internal cooling liquid cannot flow out through the quick coupling. The sealing structure is as follows: the connection structure between each branch pipeline and the quick connector is a conical surface sealing structure, the tail end interface of each branch pipeline is a spherical connector and a movable nut, the interface of the quick connector is a structure with an external thread and the inner side of the quick connector is a conical surface, when the branch pipeline is connected with the quick connector, the spherical connector is inserted into the conical surface, and the movable nut of the branch pipeline is matched and screwed with the external thread of the quick connector to realize sealing.

Further preferably, the air inlet and the air outlet of the housing are provided with mesh filter screens matched with the air inlet and the air outlet. And impurities are prevented from entering the air cooling unit shell.

Preferably, a rubber pad is arranged above the second support frame and between the radiator and the air cooling unit shell, so that on one hand, rainwater and dust in the air cooling unit shell are prevented from entering a non-air-cooling area and a mechanical room of the converter; on the other hand, the external cold air is limited to be conveyed downwards from the upper part of the shell, can be guided out from a gap between the lower part of the radiator and the rubber pad after completely passing through the upper part of the radiator, and penetrates through the second supporting frame, so that the air-cooling heat dissipation of the radiator is enhanced.

Specifically, the sealing connection structure between the pipeline between the resistance cooler and the radiator and the casing is specifically as follows: a convex flange is arranged at the front end of the pipeline close to one side of the radiator, the convex flange is fixed on the side wall of the shell through a blind hole screw seat of the end surface of the convex flange inserted with a bolt (the bolt is inserted into the blind hole screw seat from the other side of the side wall of the shell), and a silicone rubber sealing gasket is arranged between the convex flange and the side wall of the shell (the blind hole screw seat and the silicone rubber sealing gasket can ensure that rainwater and sundries can not enter a non-air-cooling area through a bolt hole); the outer terminal surface of the small flange on the convex flange is provided with an internal thread blind hole, the inner terminal surface of the small flange is provided with an O-shaped sealing groove, an O-shaped sealing ring matched with the O-shaped sealing groove is embedded in the O-shaped sealing groove (the O-shaped sealing ring is used for butt connection and sealing of a pipeline in a non-air cooling area), and the mounting hole of the rear-end plane flange of the resistance cooler is connected with the internal thread blind hole of the small flange in a bolt adaptive mode.

Further preferably, all the pipelines can adopt bellows or rubber tubes wholly or partially for adjusting the joint connection position.

The cooling system of the battery power locomotive provided by the invention has the following beneficial effects:

1. the heat dissipation of power devices (diodes and IGBTs) in the converter is solved, meanwhile, the heat dissipation of resistors, transformers and reactors is also solved, and the control of the environment temperature in the converter is also realized;

2. the requirements of sealing and designing all heat dissipation in the converter are met, and the reliable operation of the converter is ensured;

3. the corrugated pipe and the rubber pipe are used as local designs of branch pipelines, so that the adaptability to position deviation of parts in the converter is realized;

4. the quick connector is connected with other parts, so that the disassembly and assembly operation is convenient, and the cooling liquid in the system does not need to be discharged in the disassembly and assembly process;

5. the section shape is changed at a proper position of the main liquid inlet pipeline, the installation interface of the resistance cooler is increased, and the heat dissipation of the resistance is realized under the conditions that extra space in the converter is not occupied and a branch of the main liquid inlet pipeline is not needed;

6. aiming at the transformer and the reactor, a special air cooling unit is designed to control air to flow through the middle of the solenoid of the transformer and the reactor, so that the heat dissipation effect is provided;

7. the water temperature sensor and the water pressure sensor are used for monitoring the water temperature and the water pressure in the cooling system in real time, and when the water temperature or the water pressure signal is abnormal, the control unit sends a protection instruction to control the running state of the converter, so that the occurrence of related faults of the converter caused by the abnormality of the cooling system is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structural connection of the present invention;

FIG. 2 is a schematic view of the water cooling part of the present invention;

FIG. 3 is a schematic view of the expansion tank connection of the present invention;

FIG. 4 is a schematic diagram of the internal structure of the water-cooled substrate according to the present invention;

FIG. 5 is a cross-sectional view of the resistance cooler of the present invention;

FIG. 6 is a schematic view of a delta-airfoil of the resistance cooler of the present invention;

FIG. 7 is a schematic view of a micro-rib of the resistance cooler of the present invention;

FIG. 8 is a schematic view of the overall connection of the resistance cooler of the present invention;

FIG. 9 is a front sectional view of an air cooling unit of the present invention;

FIG. 10 is a rear sectional view of the air-cooling unit of the present invention;

FIG. 11 is a schematic diagram of an ambient temperature controller according to the present invention;

FIG. 12 is a schematic view of the sealing connection and disassembly structure between the water cooling part and the air cooling unit.

In the figure: 1-a radiator; 2-a resistance cooler; 21-rectangular ribs; 22-micro ribs; 23-a heat-dissipating substrate; 24-delta wing plate; 25-a front end flange; 26-a transition duct; 27-resistive type devices; 3-a main liquid inlet pipeline; 4-a water pump; 5-a main liquid outlet pipeline; 6-water cooling the substrate; 61-serpentine flow channel; 62-a flow guide port; 7-a first branch line; 8-an expansion water tank; 81-a two-way valve; 82-a liquid level meter; 83-liquid collecting box; 84-an overflow pipe; 85-honeycomb duct; 86-rubber tube; 87-stainless steel thin tubing; 9-centrifugal fan; 10-a transformer; 11-a reactor; 12-an ambient temperature controller; 121-a fan; 122-a heat absorption water tank; 124-ambient temperature sensor; 125-a second branch line; 13-an exhaust valve; 14-water temperature sensor; 15-a water pressure sensor; 16-a housing; 161-a second support; 162-a pod; 163-an air intake; 164-an air outlet; 165-a first support frame; 17-a rear end planar flange; 18-raised face flange; 181-silicone rubber gasket; 182-blind hole screw seat; 183-small flange; 184-O type sealing groove; 186-blind, internally threaded hole.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "horizontal", "vertical", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention, the terms "first" and "second" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly stated or limited otherwise, the terms "mounted", "connected", and "disposed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 11, the present invention provides an embodiment of a cooling system for a battery-powered locomotive, including a heat sink 1, wherein a liquid inlet of the heat sink 1 is connected to a liquid outlet of a resistance cooler 2 through a pipeline, and a liquid inlet of the resistance cooler 2 is connected to a liquid inlet main pipeline 3; the liquid outlet of the radiator 1 is hermetically connected with the liquid inlet of a water pump 4 through a pipeline, and the liquid outlet of the water pump 4 is hermetically connected with a main liquid outlet pipeline 5; three water-cooling base plates 6 are connected in parallel between the liquid inlet main pipeline 3 and the liquid outlet main pipeline 5 through first branch pipelines 7 respectively (as shown in fig. 2, the first branch pipelines 7 are in sealed connection with the water-cooling base plates 6 through quick connectors in practice), a serpentine flow channel 61 is arranged in each water-cooling base plate 6, and flow guide ports 62 at two ends of each serpentine flow channel 61 are in butt joint with a liquid inlet and a liquid outlet of the water-cooling base plate 6 respectively; the liquid inlet main pipeline 3 and the liquid outlet main pipeline 5 are respectively connected with a water-gas connector at the bottom of the expansion water tank 8 at the highest position through a stainless steel thin pipeline 87, a liquid outlet at the bottom of the expansion water tank 8 is connected with a pipeline at the liquid inlet of the water pump 4 through a rubber pipe 86, a two-way valve 81 is arranged at the top of the expansion water tank 8, an inlet and an outlet of the two-way valve 81 are connected with a liquid collecting tank through an overflow pipe 84, a liquid level meter 82 is assembled on the side wall of the expansion water tank 8, a liquid collecting box 83 is installed on the side wall of the expansion water tank 8, which is positioned below the liquid level meter 82, and the bottom of the liquid collecting box 83 is connected with the liquid collecting tank through a guide pipe 85; a water temperature sensor 14 and a water pressure sensor 15 are arranged at a liquid outlet of the water pump 4 on the liquid outlet main pipeline 5, and the water pressure sensor 15 and the water temperature sensor 14 are connected with a traction control unit of the converter; the resistance cooler 2 comprises a heat dissipation cavity, a front end flange 25 is fixedly arranged at the front end inlet of the heat dissipation cavity, a transition pipeline 26 is fixedly arranged at the rear end outlet of the heat dissipation cavity, and a rear end plane flange 17 is fixedly arranged at the end part of the transition pipeline 26; the heat dissipation cavity is formed by splicing a heat dissipation substrate 23 and a cover plate 28; a plurality of rectangular ribs 21 are fixedly arranged on the inner side wall of the heat dissipation substrate 23 from bottom to top in parallel, intervals are formed between the two ends of each rectangular rib 21 and the front end face and the rear end face of the inner cavity of the heat dissipation cavity, and the rectangular ribs 21 are horizontally arranged; a plurality of micro ribs 22 are fixedly arranged on the inner side wall of the heat dissipation substrate 23 between the adjacent rectangular ribs 21 from bottom to top in parallel, a plurality of micro ribs 22 are also fixedly arranged on the inner side wall of the heat dissipation substrate 23 positioned on the uppermost rectangular rib 21 from bottom to top in parallel, and similarly, a plurality of micro ribs 22 are also fixedly arranged on the inner side wall of the heat dissipation substrate 23 positioned on the lowermost rectangular rib 21 from bottom to top in parallel, and the micro ribs 22 are parallel to the rectangular ribs 21; a plurality of triangular wing plates 24 for generating vortex are horizontally and fixedly arranged between all the adjacent micro ribs 22; the outer side wall of the heat dissipation substrate 23 is provided with a plurality of preformed holes for installing the resistor devices 27, and the heat dissipation cavity is hermetically and fixedly arranged on the liquid inlet main pipeline 3 through the front end flange 25 and the rear end plane flange 17. The air cooling unit comprises a shell 16, a first support frame 165 and a second support frame 161 are respectively installed at the upper portion and the middle portion in the shell 16, the radiator 1 is installed on the second support frame 161 at the middle portion, the centrifugal fan 9 is installed on the first support frame 165 located at the upper portion in the shell 16, an air inlet 163 formed in the rear side of the shell 16 corresponds to an air inlet of the centrifugal fan 9 (mesh filter screens matched with the air inlet 163 and the air outlet 164 of the shell 16 are arranged at positions of the air inlet 163 and the air outlet 164 of the shell 16), a flow guide cover 162 is installed below the second support frame 161 (a rubber pad is arranged between the radiator 1 and the shell 16 of the air cooling unit above the second support frame 161, the rubber pad limits that air above the radiator 1 can only flow out from a ventilation opening between the lower portion and the rubber pad through the radiator 1, but cannot flow out from a ventilation opening between the radiator 1 and the shell 16, so that the radiator 1 can be cooled and cooled to the maximum extent), two air guide channels are arranged in the flow guide cover 162 in parallel (as shown in fig. 10, a transformer 10 and a reactor 11 are arranged at the bottom of the shell 16, two air guide channels are arranged on a bottom plate of the shell 16, a transformer 164, and a temperature sensor unit corresponding to be connected with a temperature sensor embedded reactor 164, and a temperature sensor are arranged below the air guide unit, and a temperature sensor embedded reactor 164, and a temperature sensor connected with the air guide unit, and a temperature sensor respectively, and a temperature sensor embedded reactor 164, and a temperature sensor respectively arranged below the air guide unit, and a temperature sensor, and the air guide unit. Finally, the system further comprises an ambient temperature controller 12 and an ambient temperature sensor 124, wherein the ambient temperature controller 12 comprises a heat absorption water tank 122, a fan 121 is installed on the heat absorption water tank 122, and a liquid inlet and a liquid outlet of the heat absorption water tank 122 are respectively connected with the liquid inlet main pipeline 3 and the liquid outlet main pipeline 5 through a second branch pipeline 125 (the heat absorption water tank 122 of the ambient temperature controller 12 is hermetically connected with the second branch pipeline 125 through a quick coupling); the ambient temperature sensor 124 (shown in fig. 2) is installed at the inlet of the main inlet pipe 3 close to the resistance cooler 2, and the ambient temperature sensor 124 is connected to the traction control unit of the converter. The sealed connection structure (as shown in fig. 12) between the pipe between the resistance cooler 2 and the heat sink 1 and the housing 16 is specifically: a convex flange 18 is arranged at the front end of the pipeline close to one side of the radiator 1, the convex flange 18 is inserted with bolts through a blind hole screw seat 182 on the end surface and fixed on the side wall of the shell 16, and a silicon rubber sealing gasket 181 is arranged between the convex flange 18 and the side wall of the shell 16; the outer terminal surface of the small flange 183 on the convex flange 18 is provided with an internal thread blind hole 186, the inner terminal surface of the small flange 183 is provided with an O-shaped sealing groove 184, an O-shaped sealing ring matched with the O-shaped sealing groove 184 is embedded in the O-shaped sealing groove 184, and the mounting hole of the rear end planar flange 17 of the resistance cooler 2 is connected with the internal thread blind hole 186 of the small flange 183 through bolt adaptation. The front end of the liquid inlet main pipeline 3 and the tail end of the liquid outlet main pipeline 5 are respectively provided with an exhaust valve 1.

In actual operation, the front end of the liquid inlet main pipeline 3 and the tail end of the liquid outlet main pipeline 5 are in a closed and blocked state, the water pump 4 is started, cooling liquid flows out of the water pump 4 under the action of the water pump 4, flows into the water outlet main pipeline 5, flows into the serpentine flow channel 61 of the water cooling substrate 6 through the first branch pipeline 7, then sequentially flows into the water inlet main pipeline 3, the resistance cooler 2 and the radiator 1, and finally enters the water pump 4 to form a circulation loop; a resistor is arranged on the end face of the outer side of the resistor cooler 2 to cool the resistor; a power device is arranged on the outer end face of the water-cooling substrate 6, and the power device is cooled; the two-way valve 81 of the expansion water tank 8 of the water cooling part is automatically opened and closed according to the pressure inside the expansion water tank 8, the pressure actually set by the two-way valve 81 is-0.1 bar to +0.4bar, when the internal pressure is lower than-0.1 bar or higher than +0.4bar, the two-way valve 81 is automatically opened, air is sucked or exhausted, and the two-way valve 81 is automatically closed after reaching the set range of the two-way valve 81; the cooling liquid enters the heat absorption water tank 122 of the ambient temperature controller 12 through the second branch pipeline 125, the fan 121 operates normally, and blows the ambient air inside the converter to the heat absorption water tank 122, so as to cool the internal environment; the centrifugal fan 9 in the air cooling unit operates to suck cold air in the external environment, the cold air passes through the first support frame 165 and blows towards the radiator 1 to cool the radiator 1, so that the temperature of the cooling liquid in the radiator 1 is rapidly reduced, the cold air is continuously conveyed downwards, under the sealing limiting action of a rubber gasket between the radiator 1 and the shell 16, the cold air passes through the radiator 1 from the upper side of the radiator 1 and then enters the air guide sleeve 162 from the second support frame 161 from the ventilation opening in the middle of the rubber gasket below the radiator 1, under the guiding action of the air guide sleeve 162, the cold air blows towards the coil gaps of the transformer 10 and the reactor 11 to accurately cool the coil gaps, and finally, the external air is led out from the air outlet 164 at the bottom of the shell 16, so that the heat dissipation of all parts in the converter is realized.

The invention realizes the heat dissipation of the resistor, the transformer 10 and the reactor 11 in the converter while meeting the heat dissipation of the power device (diode and IGBT) of the traditional cooling system, and controls the environment temperature in the converter to meet the working requirements of components. The scheme of the invention is generally divided into a water cooling part, an air cooling part and an environment temperature control part. The water cooling part is divided into a water cooling substrate 6 of the power device and a resistance cooler 2; the air cooling part comprises forced air cooling of cooling liquid (a radiator 1) of the water cooling part and forced air cooling of the transformer 10 and the reactor 11; the ambient temperature control part is used for cooling the ambient air in the converter cabinet. The scheme of the invention is implemented on the traction auxiliary converter of the battery power locomotive in Thailand export, and the effect is good.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A battery powered locomotive cooling system characterized by: the device comprises a radiator (1), wherein a liquid inlet of the radiator (1) is connected with a liquid outlet of a resistance cooler (2) through a pipeline, and a liquid inlet of the resistance cooler (2) is connected with a liquid inlet main pipeline (3); the liquid outlet of the radiator (1) is hermetically connected with the liquid inlet of a water pump (4) through a pipeline, and the liquid outlet of the water pump (4) is hermetically connected with a main liquid outlet pipeline (5); a plurality of water-cooling base plates (6) are connected in parallel between the liquid inlet main pipeline (3) and the liquid outlet main pipeline (5) through first branch pipelines (7), a snake-shaped flow channel (61) is arranged in each water-cooling base plate (6), and flow guide ports (62) at two ends of each snake-shaped flow channel (61) are respectively butted with a liquid inlet and a liquid outlet of each water-cooling base plate (6); the liquid inlet main pipeline (3) and the liquid outlet main pipeline (5) are respectively connected with a water-gas connector at the bottom of an expansion water tank (8) at the highest position through stainless steel thin pipelines (87), a liquid outlet at the bottom of the expansion water tank (8) is connected with a pipeline at a liquid inlet of a water pump (4) through a rubber pipe (86), a two-way valve (81) is arranged at the top of the expansion water tank (8), an inlet and an outlet of the two-way valve (81) are connected with a liquid accumulating tank through an overflow pipe (84), a liquid level instrument (82) is assembled on the side wall of the expansion water tank (8), a liquid collecting box (83) is arranged below the liquid level instrument (82) outside the side wall of the expansion water tank (8), and the bottom of the liquid collecting box (83) is connected with the liquid accumulating tank through a guide pipe (85); a water temperature sensor (14) and a water pressure sensor (15) are arranged at a liquid outlet of the water pump (4) on the liquid outlet main pipeline (5), and the water pressure sensor (15) and the water temperature sensor (14) are connected with a traction control unit of the converter; the resistance cooler (2) comprises a heat dissipation cavity, a front end flange (25) is fixedly arranged at the front end inlet of the heat dissipation cavity, a transition pipeline (26) is fixedly arranged at the rear end outlet of the heat dissipation cavity, and a rear end plane flange (17) is fixedly arranged at the end part of the transition pipeline (26); the heat dissipation cavity is formed by splicing a heat dissipation substrate (23) and a cover plate (28); a plurality of rectangular ribs (21) are fixedly arranged on the inner side wall of the heat dissipation substrate (23) from bottom to top in parallel, intervals are formed between the two ends of each rectangular rib (21) and the front end face and the rear end face of the inner cavity of the heat dissipation cavity, and the rectangular ribs (21) are horizontally arranged; a plurality of micro ribs (22) are fixedly arranged on the inner side wall of the heat dissipation substrate (23) between the adjacent rectangular ribs (21) from bottom to top in parallel, a plurality of micro ribs (22) are also fixedly arranged on the inner side wall of the heat dissipation substrate (23) positioned on the uppermost rectangular rib (21) from bottom to top in parallel, and similarly, a plurality of micro ribs (22) are also fixedly arranged on the inner side wall of the heat dissipation substrate (23) positioned on the lowermost rectangular rib (21) from bottom to top in parallel, and the micro ribs (22) are parallel to the rectangular ribs (21); a plurality of triangular wing plates (24) for generating vortex are horizontally and fixedly arranged between all the adjacent micro ribs (22); the outer side wall of the heat dissipation substrate (23) is provided with a plurality of preformed holes for installing resistance devices (27), and the heat dissipation cavity is sealed and fixedly arranged on the liquid inlet main pipeline (3) through a front end flange (25) and a rear end plane flange (17).

2. The battery-powered locomotive cooling system of claim 1, wherein: the air cooling device is characterized by further comprising an air cooling unit, the air cooling unit comprises a shell (16), a first support frame (165) and a second support frame (161) are installed at the upper portion and the middle portion in the shell (16) respectively, the radiator (1) is installed on the second support frame (161) at the middle portion, a centrifugal fan (9) is installed on the first support frame (165) located at the upper portion in the shell (16), an air inlet (163) formed in the rear side of the shell (16) corresponds to an air inlet of the centrifugal fan (9), a flow guide cover (162) is installed below the second support frame (161), two air guide channels are arranged in the flow guide cover (162) in parallel, a transformer (10) and a reactor (11) are arranged at the bottom in the shell (16), two air outlets (164) are formed in a bottom plate of the shell (16), the transformer (10) and the reactor (11) correspond to the respective air guide channels above and the respective air outlets (164) below, pre-buried temperature sensors are arranged on the transformer (10) and the reactor (11), and are connected with a traction control unit of the converter.

3. The battery-powered locomotive cooling system of claim 1, wherein: the environment temperature control device comprises an environment temperature controller (12) and an environment temperature sensor (124), wherein the environment temperature controller (12) comprises a heat absorption water tank (122), a fan (121) is installed on the heat absorption water tank (122), and a liquid inlet and a liquid outlet of the heat absorption water tank (122) are respectively connected with a liquid inlet main pipeline (3) and a liquid outlet main pipeline (5) through a second branch pipeline (125); the environment temperature sensor (124) is arranged at a liquid inlet of the liquid inlet main pipeline (3) close to the resistance cooler (2), and the environment temperature sensor (124) is connected with a traction control unit of the converter.

4. The battery-powered locomotive cooling system of claim 1, wherein: the first branch pipeline (7) is connected with the water-cooling base plate (6) in a sealing mode through a quick connector.

5. A battery-powered locomotive cooling system according to claim 3, wherein: the heat absorption water tank (122) of the environment temperature controller (12) is in sealing connection with the second branch pipeline (125) through a quick connector.

6. The battery-powered locomotive cooling system of claim 2, wherein: and mesh filter screens matched with the air inlet (163) and the air outlet (164) of the shell (16) are respectively arranged at the air inlet (163) and the air outlet (164).

7. The battery-powered locomotive cooling system of claim 2, wherein: and a rubber pad is arranged above the second support frame (161) and between the radiator (1) and the shell (16) of the air cooling unit.

8. The battery-powered locomotive cooling system of claim 2, wherein: the sealing connection structure between the pipeline between the resistance cooler (2) and the radiator (1) and the shell (16) is specifically as follows: a convex flange (18) is arranged at the front end of the pipeline close to one side of the radiator (1), the convex flange (18) is inserted into a bolt through a blind hole screw seat (182) on the end surface of the convex flange and fixed on the side wall of the shell (16), and a silicon rubber sealing gasket (181) is arranged between the convex flange (18) and the side wall of the shell (16); the outer terminal surface of small flange (183) on convex surface flange (18) is provided with internal thread blind hole (186), the inner terminal surface of small flange (183) is provided with O type seal groove (184), the embedded O type sealing washer that is equipped with rather than supporting of O type seal groove (184), the mounting hole of rear end planar flange (17) passes through bolt adaptation with internal thread blind hole (186) of small flange (183).

9. A battery-powered locomotive cooling system according to any one of claims 1-8, characterized by: the front end of the liquid inlet main pipeline (3) and the tail end of the liquid outlet main pipeline (5) are respectively provided with an exhaust valve (13).

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