Large-thrust circulating water pump motor ventilation and cooling structure

Abstract

The invention relates to a large-thrust circulating water pump motor ventilation and cooling structure which is composed of cooler units, an upper rack, a lower rack, a stator and a rotor. The cooler unit is a main portion for heat exchange of a motor and the outside, the upper rack and the lower rack form a sealing boundary of the ventilation and cooling structure, and the stator and the rotor form a portion for heat exchange of an iron core, a winding, a copper bar and the inside of an end ring. A traditional design concept that coolers are configured on two sides of a circulating water pump motor is changed, a ventilation dead zone is decreased, four coolers are divided into two cooler units, each cooler unit includes two coolers which are parallelly connected, and the cooling effect and reliability are improved. Windows of a rotor supporting air guiding plate and a radiation plate are optimized, the pressure and air volume are increased, and the cooling effect of eight air zones is ensured. The novel large-thrust circulating water pump motor ventilation and cooling structure is provided with eight air zones, adopts four-side heat exchange and meets the requirements of three generations of large-thrust circulating water pump motor ventilation and cooling structures.

Description

technical field [0001] The invention relates to a large-thrust circulating water pump motor ventilation and cooling structure. Background technique [0002] The motor of the large-thrust circulating water pump is a 7700kW 36-pole vertical asynchronous motor. The outer circle of the frame is larger than 5000mm. The traditional structure with two coolers on both sides can no longer meet the needs of large-capacity heat exchange. It is necessary to re-change the ventilation and cooling structure to a structure with four coolers on four sides, and set eight heat exchange air zones in the direction of the air path inside the stator to provide appropriate heat exchange efficiency and capacity. This ventilation cooling structure also needs to achieve IP55 sealing level. [0003] There is a dead zone in the air path in the axial direction of the traditional large-scale circulating pump motor, and its horizontally placed upper and lower cover plates will generate nesting wind. Due t...

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Problems solved by technology

[0003] There is a dead zone in the air path in the axial direction of the traditional large-scale circulating pump motor, and its horizontally placed upper and lower cover plates will generate nesting wind. Due to the large outer circle of the stator, if only traditional coolers are used on both sides, it will cause cooling. The vertical direction of the device produces a large number of dead zones of nearly two-thirds of the air path. Part of the dead zone is difficult for cooling air to enter, which reduces the heat dissipation performance of the stator core here, further pushing up the temperature rise of the dead zone of the air path, and affecting the motor. affect the stable operation of

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