Cooling system for locomotive traction converter

Abstract

The utility model discloses a cooling system for a locomotive traction converter, which relates to the technical field of converters, aims to solve the technical problem that the cooling effect of the existing cooling system is poor, and comprises an electric locomotive which is internally and detachably provided with a converter component and is provided with a locomotive head part and a locomotive tail part, the converter assembly comprises a converter assembly which is detachably arranged in the tail part of the electric locomotive, and the converter assembly comprises an alternating current-direct current conversion converter box of which the two sides are equidistantly and detachably provided with a plurality of groups of converter U-shaped cooling pipelines in an inserted manner; protection assemblies covering the U-shaped cooling pipelines of the converters are fixedly installed on the two sides of the alternating-current and direct-current conversion converter box at equal intervals, connecting pipes are constructed and communicated between the U-shaped cooling pipelines of the same converter at equal intervals, and flow channels used for air flow circulation are formed between the connecting pipes. The utility model has the advantage of improving the cooling effect of the converter.

Description

Technical Field

[0001] The utility model relates to the technical field of converters, and more specifically to a cooling system for a locomotive traction converter. Background Art

[0002] During the operation of the locomotive, the DC power obtained from the power grid or a DC power source such as a battery needs to be converted into AC power suitable for driving the traction motor or supplying power to auxiliary equipment. The inverter is the key device to achieve this power conversion. It can efficiently convert the input DC power into three-phase AC power with adjustable frequency and voltage to meet the needs of the locomotive traction motor or other loads.

[0003] Most of the existing locomotive traction converter cooling systems use air cooling or liquid cooling. The air cooling system uses a fan to introduce air into the converter heat sink and uses air convection to remove heat. However, under high load or high temperature environment, the fan power consumption of this system is large, the heat dissipation effect is limited, and the noise is high. The liquid cooling system uses circulating coolant to exchange heat inside the converter. Although the heat dissipation efficiency is high, the system is complex, the maintenance cost is high, and there is a risk of coolant leakage. In view of this, we propose a cooling system for locomotive traction converters. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, meet practical needs, and provide a cooling system for a locomotive traction converter to solve the technical problem that the existing cooling system has a poor cooling effect.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a cooling system for a locomotive traction converter, comprising an electric locomotive with a converter assembly detachably arranged therein;

[0006] The electric locomotive has a front part and a rear part, and the converter assembly includes a converter assembly detachably arranged inside the rear part of the electric locomotive;

[0007] The converter assembly comprises an AC-DC converter box with multiple sets of converter U-shaped cooling pipes detachably plugged and installed at equal distances on both sides, and protective components covered on the outside of the converter U-shaped cooling pipes are fixedly installed at equal distances on both sides of the AC-DC converter box, and connecting pipes are equidistantly connected between the U-shaped cooling pipes of the same converter, and a flow channel for airflow is formed between the connecting pipes;

[0008] The protection component includes a protection shell having one side fixedly connected to the AC-DC conversion inverter box and covering the outside of the U-shaped cooling pipe and the connecting pipe of the inverter. The top and bottom of the protection shell are provided with connecting grooves connected to the flow channels, and the top and bottom of the protection shell are provided with guide plates on both sides of the connecting grooves. The guide plates on both sides of the same connecting groove are arranged obliquely to form a trapezoidal structure.

[0009] The utility model arranges the converter assembly inside the electric locomotive, and makes the converter U-shaped cooling pipe extend from both sides of the electric locomotive. During the running of the electric locomotive, the internal components of the AC-DC conversion converter box lose energy in the form of heat due to the AC-DC conversion. The heat can be absorbed by the coolant inside the converter U-shaped cooling pipe and the connecting pipe. During the running of the electric locomotive, the wind force generated on both sides flows on the upper surface and the lower surface of the protective shell. The air is guided by the guide plate, so that the gas flow rate between the guide plates is accelerated, thereby accelerating the external air to pass through the converter U-shaped cooling pipe and the connecting pipe and carry the heat out, thereby realizing the heat dissipation cooling of the internal components of the AC-DC conversion converter box during the AC-DC conversion process.

[0010] Preferably, the converter U-shaped cooling pipe and the connecting pipe are in a flat tube structure, and both ends of the protective shell form arc ends.

[0011] Preferably, the trapezoidal structure formed by the guide plate has a large opening and a small opening, and the large opening is arranged toward the front of the electric locomotive.

[0012] Preferably, the guide plates arranged on both sides of the same connecting groove are commonly provided with a guide cover on the side away from the protective shell, the guide cover is connected and fixed to the guide plate structure, and the guide cover is a trapezoidal plate structure corresponding to the arrangement range between the guide plates.

[0013] Preferably, a sloped portion is formed on a side of the protective shell away from the AC / DC converter box, and the sloped structure of the sloped portion extends from the front of the electric locomotive toward the rear and tilts toward the side away from the AC / DC converter box.

[0014] Preferably, the U-shaped cooling pipes of the converter arranged on both sides of the AC-DC conversion inverter box extend into the interior thereof at opposite ends and are connected to connecting pipes, a collecting pipe is arranged between the connecting pipes, the collecting pipe is connected to the connecting pipes, a circulating pump is arranged inside the AC-DC conversion inverter box, the circulating pump is connected to a liquid suction pipe and a liquid discharge pipe, and the liquid suction pipe and the liquid discharge pipe are respectively connected to the topmost and bottommost connecting pipes.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model arranges the converter assembly inside the electric locomotive, and makes the converter U-shaped cooling pipe extend from both sides of the electric locomotive. During the running of the electric locomotive, the internal components of the AC-DC conversion converter box lose energy in the form of heat due to the AC-DC conversion. The heat can be absorbed by the coolant inside the converter U-shaped cooling pipe and the connecting pipe. During the running of the electric locomotive, the wind force generated on both sides flows on the upper surface and the lower surface of the protective shell. The air is guided by the guide plate, so that the gas flow rate between the guide plates is accelerated, thereby accelerating the external air to pass through the converter U-shaped cooling pipe and the connecting pipe and carry the heat out, thereby realizing the heat dissipation cooling of the internal components of the AC-DC conversion converter box during the AC-DC conversion process, and solving the problem of poor cooling effect of the existing cooling system.

[0017] 2. The utility model also designs the guide plates located on both sides of the same connecting groove to be obliquely arranged into a trapezoidal structure, and designs the guide cover into a trapezoidal plate structure. When the electric locomotive is running, the wind flows from the large mouth of the trapezoidal structure to the small mouth, and the cross-sectional area component of the flow is reduced, which can further accelerate the passage of gas and further enhance the negative pressure effect, thereby further accelerating the external air to pass through the U-shaped cooling duct and connecting pipe of the converter and carry the heat out, thereby enhancing the heat dissipation and cooling effect of the internal components of the AC-DC conversion converter box during the AC-DC conversion process.

[0018] 3. The utility model also designs the converter U-shaped cooling duct and the connecting pipe as a flat tube structure. When wind is generated on both sides of the electric locomotive during its travel, when the gas passes through the converter U-shaped cooling duct and the connecting pipe, the flat tube structure conforms to aerodynamics, reduces the wind resistance of the gas flow, thereby promoting the acceleration of the gas flow rate, thereby further improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the current conversion component of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the converter assembly of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the protective component of the utility model;

[0023] Figure 5 It is a cross-sectional view of the protective component of the utility model;

[0024] Figure 6 It is a top view of the protective component of the utility model.

[0025] Description of the numbers in the figure:

[0026] 1. Electric locomotive; 2. Converter assembly; 3. Converter assembly; 301. AC / DC converter box; 302. Converter U-shaped cooling duct; 303. Connecting pipe; 4. Protective assembly; 401. Protective shell; 402. Guide cover; 403. Guide plate; 404. Connecting groove; 405. Inclined portion. DETAILED DESCRIPTION

[0027] like Figure 1-Figure 6 As shown, the utility model relates to a cooling system for a locomotive traction converter, comprising an electric locomotive 1 with a converter assembly 2 detachably arranged inside, the electric locomotive 1 having a front part and a rear part, the converter assembly 2 comprising a converter assembly 3 detachably arranged inside the rear part of the electric locomotive 1, the converter assembly 3 comprising an AC / DC converter box 301 with multiple sets of converter U-shaped cooling pipes 302 detachably installed on both sides at equal distances, and protective components 4 equidistantly fixedly installed on both sides of the AC / DC converter box 301 and arranged on the outside of the converter U-shaped cooling pipe 302, and the same converter U-shaped cooling pipe 302 is fixedly installed. 02 are equidistantly connected with connecting pipes 303, and flow channels for air flow are formed between the connecting pipes 303. The protective component 4 includes a protective shell 401 which is fixedly connected to the AC-DC conversion inverter box 301 on one side and covers the outside of the inverter U-shaped cooling pipe 302 and the connecting pipe 303. Connecting grooves 404 connected to the top and bottom of the protective shell 401 are formed at positions corresponding to the flow channels, and guide plates 403 are constructed on both sides of the top and bottom of the protective shell 401 corresponding to the connecting grooves 404. The guide plates 403 arranged on both sides of the same connecting groove 404 are arranged obliquely to form a trapezoidal structure.

[0028] In the embodiment of the present utility model, the converter U-shaped cooling pipe 302 and the connecting pipe 303 are flat tube structures, and both ends of the protective shell 401 form arc ends.

[0029] By designing the converter U-shaped cooling duct 302 and the connecting pipe 303 as a flat tube structure, when wind is generated on both sides of the electric locomotive 1 during its travel, when the gas passes between the converter U-shaped cooling duct 302 and the connecting pipe 303, the flat tube structure conforms to aerodynamics, reduces the wind resistance of the gas flow, and thus promotes the acceleration of the gas flow rate.

[0030] In an embodiment of the utility model, the trapezoidal structure formed by the guide plate 403 has a large mouth and a small mouth, and the large mouth is arranged toward the front of the electric locomotive 1. The guide plates 403 arranged on both sides of the same connecting groove 404 are commonly provided with a guide cover 402 on the side away from the protective shell 401. The guide cover 402 is structurally connected and fixed to the guide plate 403, and the guide cover 402 is a trapezoidal plate structure corresponding to the arrangement range between the guide plates 403. A sloped portion 405 is formed on the side of the protective shell 401 away from the AC-DC conversion inverter box 301, and the sloped structure of the sloped portion 405 extends from the front of the electric locomotive 1 toward the rear of the vehicle and is inclined toward the side away from the AC-DC conversion inverter box 301.

[0031] By arranging the guide plates 403 on both sides of the same connecting groove 404 obliquely to form a trapezoidal structure, and designing the guide cover 402 to be a trapezoidal plate structure, when the electric locomotive 1 is running, wind flows from the large mouth of the trapezoidal structure to the small mouth, and the cross-sectional area component of the flow is reduced, thereby further accelerating the passage of gas and further enhancing the negative pressure effect, thereby further accelerating the external air to pass through the inverter U-shaped cooling duct 302 and the connecting pipe 303 and carry heat out.

[0032] In an embodiment of the utility model, the U-shaped cooling pipes 302 of the converter arranged on both sides of the AC-DC conversion converter box 301 extend into the interior thereof at opposite ends and are connected with connecting pipes, a collecting pipe is arranged between the connecting pipes, the collecting pipes are connected with the connecting pipes, a circulating pump is arranged inside the AC-DC conversion converter box 301, the circulating pump is connected with a liquid suction pipe and a liquid discharge pipe, and the liquid suction pipe and the liquid discharge pipe are respectively connected with the topmost and bottommost connecting pipes.

[0033] Working principle: This embodiment provides a cooling system for a locomotive traction inverter. When in use, the inverter assembly 2 is first installed inside the rear of the electric locomotive 1. Then, the electric locomotive 1 needs to use the internal components of the AC-DC conversion inverter box 301 to perform DC-AC conversion during driving. During the conversion process, the internal components of the AC-DC conversion inverter box 301 lose energy in the form of heat energy. Since the AC-DC conversion inverter box 301 is relatively closed, heat accumulates inside the AC-DC conversion inverter box 301. At this time, the heat is absorbed by the manifold, the connecting pipe, the inverter U-shaped cooling pipe 302 and the connecting pipe 303, thereby realizing the cooling of the internal components of the AC-DC conversion inverter box 301, and the circulating pump can be started to make the coolant circulate inside and outside the AC-DC conversion inverter box 301. The electric locomotive 1 will generate wind on both sides during driving. The wind generated on both sides flows on the upper surface and the lower surface of the protective shell 401, and the air is guided by the guide plate 403. The guide plates 403 on both sides of the same connecting groove 404 are obliquely arranged to be designed as a trapezoidal structure, and the guide cover 402 is designed as a trapezoidal plate structure. When the electric locomotive 1 is running, the wind flows from the large mouth of the trapezoidal structure to the small mouth, and the cross-sectional area component of the flow is reduced, so that the gas can pass through and the negative pressure effect can be further improved, thereby further accelerating the external air to pass through the converter U-shaped cooling pipe 302 and the connecting pipe 303 and carry heat out. By designing the converter U-shaped cooling pipe 302 and the connecting pipe 303 as a flat tube structure, when wind is generated on both sides of the electric locomotive 1 during running, when the gas passes between the converter U-shaped cooling pipe 302 and the connecting pipe 303, the flat tube structure conforms to aerodynamics, reduces the wind resistance of the gas flow, thereby promoting the acceleration of the gas flow rate, thereby further improving the cooling effect.

[0034] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A cooling system for a locomotive traction converter, characterized in that: It comprises an electric locomotive (1) having a current conversion component (2) detachably arranged therein; The electric locomotive (1) has a front part and a rear part, and the converter assembly (2) comprises a converter assembly (3) detachably arranged inside the rear part of the electric locomotive (1); The converter assembly (3) comprises an AC / DC converter box (301) having a plurality of sets of converter U-shaped cooling pipes (302) detachably plugged and installed at equal distances on both sides, protective components (4) arranged outside the converter U-shaped cooling pipes (302) being fixedly installed at equal distances on both sides of the AC / DC converter box (301), connecting pipes (303) being equidistantly connected between the converter U-shaped cooling pipes (302), and flow channels for airflow being formed between the connecting pipes (303); The protection component (4) comprises a protection shell (401) having one side fixedly connected to the AC / DC conversion converter box (301) and covering the outside of the converter U-shaped cooling pipe (302) and the connecting pipe (303); the top and bottom of the protection shell (401) are provided with connecting grooves (404) connected thereto at positions corresponding to the flow channel; and the top and bottom of the protection shell (401) are provided with guide plates (403) on both sides corresponding to the connecting groove (404); the guide plates (403) provided on both sides of the same connecting groove (404) are arranged obliquely to form a trapezoidal structure.

2. A cooling system for a locomotive traction converter according to claim 1, characterized in that: The converter U-shaped cooling pipe (302) and the connecting pipe (303) are in a flat tube structure, and both ends of the protective housing (401) form arc-shaped ends.

3. A cooling system for a locomotive traction converter according to claim 1, characterized in that: The trapezoidal structure formed by the guide plate (403) has a large opening and a small opening, and the large opening is arranged toward the front of the electric locomotive (1).

4. A cooling system for a locomotive traction converter according to claim 3, characterized in that: The guide plates (403) arranged on both sides of the same connecting groove (404) are provided with a guide cover (402) on one side away from the protective shell (401); the guide cover (402) is structurally connected and fixed to the guide plates (403); and the guide cover (402) is a trapezoidal plate structure corresponding to the arrangement range between the guide plates (403).

5. A cooling system for a locomotive traction converter according to claim 4, characterized in that: A sloped portion (405) is formed on a side of the protective housing (401) away from the AC / DC conversion converter box (301), and the sloped structure of the sloped portion (405) extends from the front of the electric locomotive (1) toward the rear of the locomotive and is inclined toward a side away from the AC / DC conversion converter box (301).

6. A cooling system for a locomotive traction converter according to claim 1, characterized in that: The converter U-shaped cooling pipes (302) arranged on both sides of the AC / DC converter box (301) have their ends facing each other extending into the interior thereof and connected to connecting pipes, a confluence pipe is arranged between the connecting pipes, the confluence pipe is connected to the connecting pipes, a circulating pump is arranged inside the AC / DC converter box (301), the circulating pump is connected to a liquid extraction pipe and a liquid discharge pipe, the liquid extraction pipe and the liquid discharge pipe are respectively connected to the connecting pipes at the top and the bottom.

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