Motor stator ventilation structure with rectangular cross-section streamlined channel steel

Abstract

The invention discloses a motor stator ventilation structure with rectangular section streamlined channel steels, which mainly comprises sectional stator iron cores, radial ventilation ducts and ventilation channel steels, wherein the sectional stator iron cores are distributed in the axial direction, the radial ventilation ducts are arranged between the adjacent sectional stator iron cores and are formed by the ventilation channel steels distributed along the circumference, the stator iron core comprises stator teeth and stator slots, the stator teeth and the stator slots of the adjacent sectional stator iron cores correspond one to one in the axial direction, a winding is placed in the stator slot, the ventilation channel steels are installed among the stator teeth of the adjacent sectional stator iron cores, the ventilation channel steel adopts a streamlined structure and the section is rectangular, three channel steels with different lengths are placed between the stator teeth of adjacent sectional stator iron cores, and the channel steels are periodically distributed in the whole radial ventilation ducts. The above structure can effectively reduce wind wear loss in the ventilation ducts and solve the problem that existing motor stator has poor cooling effects and the local temperature of the tail part of the stator coil rises too high.

Description

technical field [0001] The invention relates to a stator ventilation structure with a rectangular cross-section streamlined channel steel, in particular to a motor stator radial ventilation system, which belongs to the technical field of motor ventilation. Background technique [0002] For a large motor with a radial ventilation system, the loss of the stator part of the motor is mainly radiated outward through the cooling air flow of the radial ventilation groove. However, when the cooling gas passes through the radial ventilation groove, the flow velocity increases due to the sudden narrowing of the wind path section; when the cooling gas flows out from the tail of the stator bar, due to the gas on both sides of the stator bar The large difference in flow velocity causes eddy currents to form at the tail of the stator coil, and the wind speed in the middle of the eddy current is extremely small, which seriously affects the heat dissipation at the tail of the stator coil. ...

AI Technical Summary

Problems solved by technology

The straight-line stator ventilation channel described in Chinese patent No. 201220141957.4 has a simple structure, but it cannot change the airflow direction in the radial ventilation ditch of the stator, and the eddy current loss at the tail of the stator coil is large; the V-shaped stator described in Chinese patent No. 201520770017.5 Although the ventilation channel steel can change the air flow direction of the stator, there is an unbalanced air flow direction and the overall temperature of the stator is high; the ventilation channel steel with a multi-turn structure described in Chinese Patent No. 201410835452.1, due to its turning structure, is not smooth , the cooling gas is greatly lost in the wind mill in the ventilation ditch, and the heat dissipation effect is not good

Images