Traction converter assembly box

Abstract

The utility model relates to the technical field of rail transit equipment, and discloses a traction converter assembly box, which comprises a box body, two traction inverter power modules, a four-quadrant converter module, a plurality of intermediate capacitor modules and a water cooling module, the box body internally comprises a power module placing cavity, a pipeline distribution cavity and a water cooling module placing cavity; the pipeline distribution cavity is positioned between the power module placement cavity and the water cooling module placement cavity to separate the two cavities; water cooling substrates are arranged in the four-quadrant converter module and the traction inverter power module; the traction inverter power module and the four-quadrant converter module are sequentially arranged in the power module placing cavity, and the intermediate capacitor modules are alternately placed between the traction inverter power module and the four-quadrant converter module at intervals; the technical problem that an existing traction converter assembly box and an assembly layout mode of the existing traction converter assembly box cannot be suitable for a traction converter of a double-current train is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit equipment, and particularly relates to a traction converter assembly box. Background Art

[0002] A dual-power-supply train is a special high-speed railway train that has two different power supply systems and can automatically switch between AC 25KV and DC 1.5KV power supply lines for operation; this train design enables it to seamlessly switch between suburban railways and urban railways;

[0003] For the main circuit of the traction converter of the dual-power-supply train, a two-level voltage-source AC-DC-AC conversion circuit is required, and electrical component groups need to be configured separately in the traction converter to cope with the two power supply methods of DC power supply voltage and AC power supply voltage; with the increase in electrical components, the original layout method of electrical components no longer meets the requirements of being compact and convenient for disassembly, installation and maintenance, and the newly added electrical components will generate more heat, and a heat dissipation system with better cooling effect is urgently needed. Content of the Utility Model

[0004] The utility model aims to provide a traction converter assembly box to solve the technical problem that the existing traction converter assembly box and its assembly layout method are not applicable to the traction converter of the dual-power-supply train.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: the traction converter assembly box includes a box body, a traction inverter power module for inverting DC voltage into three-phase variable-frequency and variable-voltage alternating current, a four-quadrant converter module for rectifying AC voltage into a stable DC bus voltage, an intermediate capacitor module for storing direct current and outputting a smooth current, and a water-cooling module for heat dissipation;

[0006] The box body includes a power module placement cavity, a pipeline distribution cavity, and a water-cooling module placement cavity; the pipeline distribution cavity is located between the power module placement cavity and the water-cooling module placement cavity to separate the two; the traction inverter power module, the four-quadrant converter module, and the intermediate capacitor module are placed in the power module placement cavity, the water-cooling module is placed in the water-cooling module placement cavity, water-cooling substrates are provided in both the four-quadrant converter module and the traction inverter power module, pipelines are provided in the pipeline distribution cavity to connect the water-cooling substrates with the water-cooling module, and a coolant for circulating between the water-cooling substrates and the water-cooling module is provided in the pipelines;

[0007] There are two traction inverter power modules, and multiple intermediate capacitor modules. The two traction inverter power modules and the four-quadrant converter module are arranged in sequence, and the multiple intermediate capacitor modules are interspersed and placed between the two traction inverter power modules and the four-quadrant converter module.

[0008] The principle and advantages of this solution are as follows: A new traction converter assembly box for double-current system trains is provided. A water-cooling module is equipped for the converter in the assembly box to improve the refrigeration effect, and the water-cooling pipes are set separately, which is convenient for installation and maintenance; the power placement module and the water-cooling module are separated by the pipe distribution cavity, avoiding the influence on the electrical components of the power module caused by the failure of the water-cooling module. Separating the water-cooling module and the power module by a certain distance can also extend the heat dissipation effect and prevent the heat dissipated by the heat exchange of the water-cooling module from being transferred to the power module again.

[0009] The intermediate capacitor module is inserted between the traction inverter with a water-cooled substrate and the four-quadrant converter, which can control the temperature of the intermediate capacitor module by means of the heat dissipation effects of the traction inverter and the four-quadrant converter. There is no need to separately set a water-cooled substrate and connect pipes for the intermediate capacitor module, reducing the weight of the overall traction converter assembly box; at the same time, compared with the traditional centralized placement of the intermediate capacitor modules that requires a certain distance between the intermediate capacitor modules, this distribution method can shorten the distance between the intermediate capacitor and the adjacent traction inverter or four-quadrant converter, making the structure inside the traction converter assembly box more compact.

[0010] As an improvement, the water-cooling module includes a heat exchanger, a cooling fan, a water pump, and a water tank; the pipes include a water inlet pipe, a water outlet pipe, and a cooling pipeline.

[0011] The water inlet pipe is connected to the quick connector at the water inlet end of the water-cooled substrate through the water distribution pipe on it. The quick connector at the water outlet end of the water-cooled substrate is connected to the water distribution pipe on the water outlet pipe. The water outlet pipe is connected to the pipe joint at one end of the cooling pipeline. The other end pipe joint of the cooling pipeline is connected to the water inlet of the water pump. The water inlet pipe is connected to the water outlet of the water pump. The external interface of the cooling pipeline is connected to the heat exchanger. The water inlet pipe and the water outlet pipe are respectively connected to the water tank. The water tank is connected to the water pump. The cooling fan is located beside the heat exchanger and is used to blow the air outside the box into the heat exchanger.

[0012] The beneficial effect of this improvement is: The forced water circulation cooling method is adopted to improve the heat dissipation effect, and the heat dissipation intensity can be further accurately controlled by controlling the coolant flow rate.

[0013] As an improvement, the water-cooling module placement cavity includes the side walls of two sides of the box body and the bottom of one side of the box body. An air inlet connected to the outside is provided on the side wall of the box body close to the cooling fan in the water-cooling module placement cavity. An air outlet communicating with the outside is provided on the bottom of the box body in the water-cooling module placement cavity; heat sinks communicating with the outside of the box body are provided on the side wall of the box body in the water-cooling module placement cavity, and the heat sinks and the air inlet are located on different side walls of the box body.

[0014] The beneficial effect of this improvement is: the water cooling module is placed close to the edge of the cavity, the contact area between the water cooling module and the outside world is increased, so that the water cooling module can quickly exchange heat with the outside of the box, and a one-way air flow is formed by single-sided air inlet and single-sided air outlet, which can avoid the diffusion of hot air inside the box and speed up the discharge of hot air from the box. The installation of heat sinks can accelerate heat dissipation without affecting airflow.

[0015] As an improvement, a mounting frame is provided in the water cooling module placement cavity, the mounting frame is fixed on the inner wall of the water cooling module placement cavity, and a gap is provided between the mounting frame and the air outlet for air flow to pass through.

[0016] The beneficial effect of this improvement is that the water cooling module is installed on the mounting frame so that a gap is left between the bottom of the water cooling module and the air outlet to facilitate air flow to pass through and take away heat.

[0017] As an improvement, the box body is further provided with a contactor module placement cavity for placing a contactor module, a resistor module placement cavity for placing a resistor module, and a control module placement cavity for placing a traction controller;

[0018] The contactor module placement cavity is adjacent to the power module placement cavity, and the control module placement cavity is adjacent to the water cooling module placement cavity; the resistance module placement cavity is located between the control module placement cavity and the contactor module placement cavity, and the placement cavities in the box body are distributed in sequence along the four edges of the box body, and each placement cavity is provided with an inspection door on the side wall of the box body.

[0019] The beneficial effect of this improvement is that each module is arranged along the edge and is provided with an inspection door, so that the staff can install and repair each module from the outside of the box to the inside.

[0020] As an improvement, a partition is provided between the water cooling module placement cavity and the pipeline distribution cavity, and between the water cooling module placement cavity and the control module placement cavity.

[0021] The beneficial effect of this improvement is that the partition is used for heat insulation to prevent the heat in the cavity where the water cooling module is placed from being transferred into the box.

[0022] As an improvement, both the air inlet and the air outlet are provided with filter screens.

[0023] The beneficial effects of this improvement are: filtering the airflow to prevent impurities from entering the assembly box with the airflow, while reducing the impact of the airflow on the internal components to prevent the airflow from causing adverse effects on the internal components.

[0024] As an improvement, lifting ears for connecting to the vehicle body are symmetrically provided on both sides of the top of the box.

[0025] The beneficial effect of this improvement is that it facilitates the connection between the traction converter assembly box and the vehicle body. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the distribution of each placement cavity inside the box body.

[0027] Figure 2 It is a schematic diagram of the distribution of each module inside the box body.

[0028] Figure 3 It is a schematic diagram of the oblique top view of the overall structure of the box body.

[0029] Figure 4 It is a schematic diagram of the oblique top view of the overall structure of the box body from another perspective.

[0030] Figure 5 It is a schematic diagram of the oblique bottom view of the overall structure of the box body from another perspective. Detailed Description of the Invention

[0031] The following is a further detailed description through specific embodiments:

[0032] The reference numerals in the drawings of the specification include: box body 1, traction inverter power module 2, four-quadrant converter module 3, intermediate capacitor module 4, lifting lug 5, power module placement cavity 6, pipeline distribution cavity 7, water-cooling module placement cavity 8, heat exchanger 9, cooling fan 10, water tank 11, air inlet 12, air outlet 13, heat sink 14, mounting bracket 15, contactor module placement cavity 16, resistor module placement cavity 17, control module placement cavity 18, inspection door 19, partition 20, and filter net 21.

[0033] Embodiment

[0034] Basically as shown in the attached Figure 1 and the attached Figure 2 As shown, the traction converter assembly box includes a box body 1, a traction inverter power module 2 for converting DC voltage into three-phase variable-frequency and variable-voltage alternating current, a four-quadrant converter module 3 for rectifying AC voltage into a stable DC bus voltage, an intermediate capacitor module 4 for storing direct current and outputting smooth current, and a water-cooling module for heat dissipation; lifting lugs 5 for connecting with the vehicle body are symmetrically arranged on both sides of the top of the box body 1.

[0035] The box body 1 includes a power module placement cavity 6, a pipeline distribution cavity 7, and a water-cooling module placement cavity 8; the pipeline distribution cavity 7 is located between the power module placement cavity 6 and the water-cooling module placement cavity 8 to separate the two; the traction inverter power module 2, the four-quadrant converter module 3, and the intermediate capacitor module 4 are placed in the power module placement cavity 6, the water-cooling module is placed in the water-cooling module placement cavity 8, water-cooling substrates are provided in both the four-quadrant converter module 3 and the traction inverter power module 2, pipelines are provided in the pipeline distribution cavity 7 to connect the water-cooling substrates with the water-cooling module, and a coolant for circulating between the water-cooling substrates and the water-cooling module is provided in the pipelines.

[0036] There are two traction inverter power modules 2 and three intermediate capacitor modules 4. The two traction inverter power modules 2 and the four-quadrant converter module 3 are arranged in sequence, and the three intermediate capacitor modules 4 are interspersed and placed between the two traction inverter power modules 2 and the four-quadrant converter module 3.

[0037] The water-cooling module includes a heat exchanger 9, a cooling fan 10, a water pump, and a water tank 11; the pipeline includes a water inlet pipe, a water outlet pipe, and a cooling pipeline;

[0038] The water inlet pipe is connected to the quick connector at the water inlet end of the water-cooled substrate through the water distribution pipe on it. The quick connector at the water outlet end of the water-cooled substrate is connected to the water distribution pipe on the water outlet pipe. The water outlet pipe is connected to the pipe joint at one end of the cooling pipeline. The pipe joint at the other end of the cooling pipeline is connected to the water inlet of the water pump. The water inlet pipe is connected to the water outlet of the water pump. The external interface of the cooling pipeline is connected to the heat exchanger 9. The water inlet pipe and the water outlet pipe are respectively connected to the water tank 11. The water tank 11 is connected to the water pump. The cooling fan 10 is located beside the heat exchanger 9 and is used to blow the external air of the box body 1 into the heat exchanger 9.

[0039] The water-cooling module placement cavity 8 includes the side walls of the two sides of the box body and the bottom of the box body. An air inlet 12 connected to the outside is provided on the side wall of the box body in the water-cooling module placement cavity close to the cooling fan 10. An air outlet 13 communicating with the outside is provided on the bottom of the box body 1 in the water-cooling module placement cavity; a heat sink 14 communicating with the outside of the box body 1 is provided on the side wall of the box body 1 in the water-cooling module placement cavity. The heat sink 14 and the air inlet 12 are on different side walls of the box body 1.

[0040] An installation frame 15 is provided in the water-cooling module placement cavity. The installation frame 15 is fixed on the inner wall of the water-cooling module placement cavity. A gap for the air flow to pass through is provided between the installation frame 15 and the air outlet 13.

[0041] A contactor module placement cavity 16 for placing a contactor module, a resistor module placement cavity 17 for placing a resistor module, and a control module placement cavity 18 for placing a traction controller are further provided in the box body 1; the contactor module placement cavity 16 is adjacent to the power module placement cavity 6, the control module placement cavity 18 is adjacent to the water-cooling module placement cavity 8, and the resistor module placement cavity 17 is located between the control module placement cavity 18 and the contactor module placement cavity 16; the resistor module includes a pre-charge resistor, an over-voltage suppression resistor, etc., and the contactor module includes an AC main contactor, an AC pre-charge contactor, a DC main contactor, a DC pre-charge contactor, etc.

[0042] The placement cavities in the box body 1 are sequentially distributed along the four peripheral edges of the box body 1; partitions 20 are provided between the water-cooling module placement cavity 8 and the pipeline distribution cavity 7, and between the water-cooling module placement cavity 8 and the control module placement cavity 18.

[0043] As shown in the attached Figure 3 , the attached Figure 4 and the attached Figure 5 As shown, a maintenance door 19 is provided on the side wall of the box body 1 in each placement cavity; filter nets 21 are provided at both the air inlet 12 and the air outlet 13.

[0044] The traction converter assembly box adopts a modular design and is composed of a four - quadrant converter module, an intermediate support capacitor, a traction inverter module, and a water cooling system. Each power module is composed of IGBT elements, a trigger unit, a heat dissipation device, etc. The converter adopts a forced water circulation cooling method. Quick connectors are installed on the modules, which can be quickly plugged and unplugged without discharging the coolant in the cooling circuit. Each module of the converter is connected to the peripheral control circuit through a connector, and the main circuit terminal, control connector, and quick connector are convenient for disassembly and assembly. Opening the converter cabinet door can facilitate the disassembly, assembly, and maintenance of the converter module.

[0045] The above are only the embodiments of the present invention, and common general technical solutions and / or characteristics in the solutions are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. Traction converter assembly box, characterized by: It includes a box, a traction inverter power module for inverting DC voltage into three-phase variable frequency and variable voltage AC power, a four-quadrant converter module for rectifying AC voltage into a stable DC bus voltage, an intermediate capacitor module for storing DC power and outputting smooth current, and a water cooling module for heat dissipation; The box body includes a power module placement cavity, a pipeline distribution cavity and a water cooling module placement cavity; the pipeline distribution cavity is located between the power module placement cavity and the water cooling module placement cavity to separate the two; the traction inverter power module, the four-quadrant converter module and the intermediate capacitor module are placed in the power module placement cavity, the water cooling module is placed in the water cooling module placement cavity, the four-quadrant converter module and the traction inverter power module are both provided with water cooling substrates, the pipeline distribution cavity is provided with pipelines to connect the water cooling substrate with the water cooling module, and the pipelines are provided with coolant for circulating between the water cooling substrate and the water cooling module; There are two traction inverter power modules and multiple intermediate capacitor modules. The two traction inverter power modules and the four-quadrant converter module are arranged in sequence, and the multiple intermediate capacitor modules are interspersed and placed between the two traction inverter power modules and the four-quadrant converter module.

2. The traction converter assembly box according to claim 1, characterized in that: The water cooling module includes a heat exchanger and a cooling fan, a water pump and a water tank; the pipeline includes a water inlet pipe, a water outlet pipe and a cooling pipeline; The water inlet pipe is connected to the water inlet end quick joint of the water-cooled base plate through the water distribution pipe thereon, the water outlet end quick joint of the water-cooled base plate is connected to the water distribution pipe on the water outlet pipe, the water outlet pipe is connected to the pipe joint at one end of the cooling pipeline, the pipe joint at the other end of the cooling pipeline is connected to the water inlet of the water pump, the water inlet pipe is connected to the water outlet of the water pump, the external interface of the cooling pipeline is connected to the heat exchanger, the water inlet pipe and the water outlet pipe are connected to the water tank respectively, the water tank is connected to the water pump, and the cooling fan is located next to the heat exchanger and is used to blow the outside air of the box into the heat exchanger.

3. The traction converter assembly box according to claim 2, characterized in that: The water-cooling module placement cavity includes two side walls of the box body and a bottom of the box body. The water-cooling module placement cavity is provided with an air inlet connected to the outside world on the side wall of the box body close to the cooling fan, and the water-cooling module placement cavity is provided with an air outlet connected to the outside world on the bottom of the box body; the water-cooling module placement cavity is provided with a heat sink connected to the outside of the box body on the side wall of the box body, and the heat sink and the air inlet are located on different side walls of the box body.

4. The traction converter assembly box according to claim 3, characterized in that: A mounting frame is arranged in the water cooling module placement cavity, and the mounting frame is fixed on the inner wall of the water cooling module placement cavity. A gap is arranged between the mounting frame and the air outlet for air flow to pass through.

5. The traction converter assembly box according to claim 4, characterized in that: The box body is also provided with a contactor module placement cavity for placing a contactor module, a resistor module placement cavity for placing a resistor module, and a control module placement cavity for placing a traction controller; The contactor module placement cavity is adjacent to the power module placement cavity, and the control module placement cavity is adjacent to the water cooling module placement cavity; the resistance module placement cavity is located between the control module placement cavity and the contactor module placement cavity, and the placement cavities in the box body are distributed in sequence along the four edges of the box body, and each placement cavity is provided with an inspection door on the side wall of the box body.

6. The traction converter assembly box according to claim 5, characterized in that: A partition is provided between the water cooling module placement cavity and the pipeline distribution cavity, and between the water cooling module placement cavity and the control module placement cavity.

7. The traction converter assembly box according to claim 6, characterized in that: The air inlet and the air outlet are both provided with filter screens.

8. The traction converter assembly box according to claim 7, characterized in that: The top of the box body is symmetrically provided with lifting ears for connecting with the vehicle body.

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