Evaporative cooling system of rail transit traction equipment and rail transit traction equipment

Abstract

The invention discloses an evaporative cooling system for rail transit traction equipment, which includes a water cooling chamber, an air cooling chamber and a liquid cooling circuit. The water cooling plate is connected; one end of the main water inlet pipe and the main water outlet pipe are connected through the transformer cooling assembly, the other end of the main water inlet pipe is connected with the driving part, the other end of the main water outlet pipe is connected with the heat exchanger, and the driving part is connected with the heat exchanger. Connected; the heat exchanger is located in the heat dissipation duct of the air-cooling chamber, and is used to dissipate the heat absorbed by the liquid-cooling circuit to the air. The invention also discloses a rail transit traction device, which includes a converter, a transformer, and the above-mentioned evaporative cooling system. The power modules in the converter are respectively located on both sides of the water-cooled chamber, and the transformer is located on the side of the water-cooled chamber. one end. The cooling system and traction equipment of the present invention have the advantages of high integration, simple and compact structure, good heat dissipation effect and the like.

Description

technical field [0001] The invention mainly relates to the technical field of rail traffic, in particular to an evaporative cooling system of rail traffic traction equipment and rail traffic traction equipment. Background technique [0002] With the continuous improvement of rail transit capacity and speed, the demand for reducing weight and volume of traction equipment is increasing. The electrical equipment on the vehicle has heat dissipation requirements. As the demand for weight reduction increases, the power density is also increasing. At the same time, the weight reduction requirements for the cooling equipment itself are also increasing. The equipment on the vehicle includes transformers, converters, switches and other components. Due to the different characteristics of each component, different cooling methods are generally used. For example, the transformer is cooled by circulating silicon oil, the converter is generally water-cooled, and the switching device is nat...

AI Technical Summary

Problems solved by technology

In the cooling method of the original system, since the transformer needs to be cooled by insulating oil, and the converter is cooled by water, two sets of cooling devices are required, namely, the water cooling device of the converter and the oil cooling device of the transformer, which greatly increases the heat dissipation system. Complexity

In addition, due to the viscosity characteristics of insulating oil, the viscosity is extremely high at low temperature, so the oil pump cannot directly drive the oil circuit to circulate when it is started at low temperature. It needs to be heated first to turn it into a pure liquid state, and then start the pump cycle. For local areas, the oil circuit is widely distributed and cannot be fully heated, so the efficiency is very low

Moreover, inside the transformer, the oil cooling of the original system is to generate oil circulation power through natural convection, and there will be some dead angles. Due to insufficient circulation, the local temperature is high, which seriously affects the life of the insulation layer and leads to failures.

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