The cooling capacity of the traction converter cooling system directly affects whether the converter can work safely and stably for a long time. CRH3 EMU traction converter cooling system, model simulation required size and boundary conditions are obtained by the actual measurement and dynamic test to ensure the authenticity of the simulation analysis. The ANSYS/FLOTRAN is used to simulate the flow field and temperature field of the heat exchanger of the traction converter cooling system. Compared with the previous empirical simplified formula method or experimental measurement method, the calculation accuracy and measurement difficulty are avoided. The distribution of the wind speed, pressure, temperature, etc. of the cooling system heat exchanger can be easily and clearly obtained. By comparatively studying and designing the temperature change of the cooling fluid in and out of the pipeline, the cooling power of the converter cooling system is calculated, which provides a reliable basis for the performance evaluation and structural improvement of the CRH3 EMU traction converter cooling system.
Traction Converter Cooling System Structure The CRH3 high-speed train traction converter uses a fully-enclosed circulating water cooling system. The cooling system is composed of an expansion tank, a water pump, a water-air heat exchanger, a cooling module, a pipeline, etc. The cooling medium is a mixture of high purity water and antifreeze. Traction converter filter cut-off valve fan heat exchanger, quick connector expansion tank water pump pressure sensor temperature sensor, pressure sensor temperature sensor cut-off valve, traction converter cooling system working principle, for the cooling medium from the pump to the main converter External heat exchanger, part of the cooling medium flows from the heat exchanger to the expansion tank, and the remaining part of the cooling medium is cooled by the heat exchanger and then flows back to the main converter and flows into the eight phase-connected modules connected in parallel with the power device. The heat exchange; then pumped out by the water pump, pumped by the pump to the heat exchanger, so reciprocating.
Criss-cross grooves design enhance water evacuation, effectively prevent tire lateral slip on wet road.
Central rib combined with horizontal grooves provides nice stability, excellent acceleration and brake performance at high speed.
Low levels of noise and vibration for maximum comfort.
Low rolling resistance reduces fuel consumption.
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