Large-power-density compact-type motor for mining blower fan

Abstract

The invention discloses a large-power-density compact-type motor for a mining blower fan, and the motor comprises a stator, a rotor, and a cooling device. The stator comprises a base and a stator core with a winding. The rotor comprises a shaft and a cage rotor. The cooling device comprises a ventilating duct, an internal fan, and an external fan. The base comprises a base cylinder, and the outer wall of the base cylinder is provided with ventilation channels. The ventilation channels are communicated with the inner cavity of the base cylinder through ventilation holes I. The outer wall of the base cylinder is alternately provided with radiating ribs and radiation tubes in the peripheral direction in a uniform manner, and the radiation tubes are communicated with the inner cavity of the base cylinder through ventilation holes II. According to the invention, the whole series employs an IC411 housekeeping fin cooling mode, thereby achieving the strict control of the stator current density, rotor current density, end ring current density, current multiple and torque multiple. The motor employs a bearing structure which can bear a bigger axial force and a radial force at the same time, and the oil injection and drain pipes are designed reasonably. The motor meets the requirements of the load characteristics of the mining blower fan, so as to solve problems of motor overtemperature, bearing damages, and oil inject and drain difficulties.

Description

technical field [0001] The invention relates to the field of electric motors, in particular to a high power density compact electric motor for a mine fan. Background technique [0002] According to the data released by the coal mine accident inquiry system of the National Coal Mine Safety Supervision Bureau, in recent years, the total number of gas accidents, the number of deaths, and the number of deaths in a single accident have ranked first among all types of disasters in coal mines. especially important. Coal mine main ventilator continuously transports fresh air underground, and dilutes gas and other toxic and harmful gases and dust, which is the basic guarantee for life safety in mine underground. Safety, once the motor stops, all mine personnel must evacuate, and the equipment is very critical. However, due to the characteristics of the main ventilation fan in the coal mine itself, the operating conditions of the high-voltage motor are very bad, which are mainly ref...

AI Technical Summary

Problems solved by technology

After the promulgation of JB / T8674-2007, it replaced JB / T8674-1997. In 2010, the YB series motor (IC411) no longer issued a production license and was forced to eliminate it. The YBF series as a derivative series has also fallen behind. The 560- The 900 series has the problems of large size and low efficiency

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