Ventilation steel channel, manufacturing method of ventilation steel channel, ventilation structure and motor

Abstract

The invention provides a ventilation steel channel, a manufacturing method of the ventilation steel channel, a ventilation structure and a motor. The ventilation steel channel provided by the invention comprises at least four ventilation steel channel sections which are sequentially connected, wherein an included angle between every two adjacent ventilation steel channel sections is smaller than 180 degrees; in every three ventilation steel channel sections which are sequentially connected, the ventilation steel channel sections at both sides are distributed at both the sides of the ventilation steel channel in the middle. According to the ventilation steel channel provided by the invention, the multi-turn structure can effectively break through a boundary layer between the ventilation steel channel and cooling gas flowing through ventilation grooves; the heat dissipation area is increased; cooling and heat dissipating effects are reinforced; meanwhile, under the condition of reducing used materials, supporting intensity of the ventilation steel channel can be ensured.

Description

technical field [0001] The invention relates to cooling of motors, in particular to ventilation channel steel, its manufacturing method, ventilation structure and motor. Background technique [0002] When the motor (including the motor and generator) is running, energy loss will be generated on the coil, iron core and other components, and this part of the loss will eventually be dissipated in the form of heat energy. If the ventilation design of the motor is unreasonable, it will cause the temperature rise of the motor Excessively high or uneven local temperature rise. Excessive temperature rise will lead to insulation aging, and long-term operation will reduce the electrical performance of the insulation, while local uneven temperature rise will generate large thermal stress, resulting in permanent damage to the motor structure, and eventually lead to motor failure. Therefore, reducing the temperature rise of the motor is of great significance for improving the safety mar...

AI Technical Summary

Problems solved by technology

[0005] The design of traditional ventilation channel steel and ventilation structure does not pay special attention to the influence of ventilation channel steel on the cooling effect of cooling gas

The traditional ventilation channel steel only plays the role of supporting and separating the ventilation trench between adjacent iron core segments, but the inventor found through analysis and thinking that the shape of the ventilation channel steel can have a great influence on the flow of cooling gas in the ventilation trench , determines the quality of the cooling performance of the motor, because the turbulence of the cooling gas flowing through the ventilation groove can be different under different shapes of the ventilation channel steel, which will affect the heat dissipation coefficient of the motor surface and the local pressure drop, and finally affect the motor performance. temperature rise

Therefore the shape design of the ventilation channel steel is a key technology, but simultaneously the design of the ventilation channel steel also needs to consider factors such as manufacturability, installation reliability and cost, which makes the design of the ventilation channel steel have certain difficulties. Channel steel plays an important role, but there are few studies on this aspect

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