A combined air cooling device for subway traction converter

Abstract

The invention belongs to the technical field of rail transit, and relates to a combined air-cooling device for a subway traction converter, comprising a detachable air inlet assembly and an air outlet assembly, the air inlet assembly and the air outlet assembly are connected through an air duct connection part; The components include the radiator and the air inlet cover, which are detachably connected; the air outlet components include the adjustable-speed cooling fan assembly, the fan frame assembly, and the fan cover. The adjustable-speed cooling fan assembly is installed on the In the fan frame assembly, the fan cover plate is detachably connected with the fan frame assembly. The combined air-cooling device, through the design of the air duct, uses the adjustable-speed cooling fan to cooperate with the radiator to carry out forced cold air to dissipate heat, realize the cooling of the converter, and solve the problem that the traction converter cannot continue to dissipate heat without running wind question. Moreover, the volume of the combined air cooling device is significantly reduced, which can save the installation space of the cooling device of the subway converter cabinet and meet the trend of miniaturization design of the converter.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and relates to a combined air cooling device, in particular to a combined air cooling device for a subway traction converter. Background technique [0002] Traction converter is the core component of rail transit vehicles, and its electrical components will generate heat loss during operation, which will cause the temperature of electrical components to rise. If the temperature exceeds the limit that the components can withstand, it may cause dangers such as insulation failure and fire on the electrical components. Therefore, a suitable cooling system must be used to remove the heat generated during the operation of the converter, so as to ensure the normal operation of the converter. , so as to ensure the safe operation of the vehicle. [0003] In recent years, rail transit equipment tends to be lightweight and miniaturized. As the core component of the traction system of subway vehicles, ...

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Problems solved by technology

[0004] However, the following problems still exist in the prior art: 1) The heat flux density of the heat sink passively dissipated by the running wind is low, and more heat-generating power devices cannot be arranged on the heat sink substrate of the same area; 2) the finned heat sink with heat pipe The radiator device is bulky, because it needs to use the traveling wind to dissipate heat. In order to ensure the heat dissipation efficiency, the internal radiator needs to design larger fins and heat pipes to increase the contact area with the traveling wind, resulting in a large radiator; 3 ) When the subway vehicle stops running, it will not be able to generate sufficient speed of running wind, and the heat exchange device will not be able to effectively dissipate heat; 4) The heat dissipation efficiency of the existing scheme cannot be adjusted independently: the heat dissipation efficiency of the existing scheme is affected by the speed of the running wind, especially for the subway When the vehicle starts to accelerate, the traction converter generates a lot of heat. When the wind speed is low, the traction converter heat accumulates and the temperature of the power device rises rapidly.

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