Medium-sized high-voltage three-phase asynchronous motor

Abstract

The invention relates to a medium-sized high-voltage three-phase asynchronous motor. A front end cover and a rear end cover are installed at both ends of a casing; a stator is installed in the casing, fixed on the front end cover and the rear end cover, and connected with a junction box; a rotor is located in the casing, the front end and the rear end of the rotor are respectively installed on the front end cover and the rear end cover through a front bearing assembly and a rear bearing assembly, and the front bearing assembly and the rear bearing assembly are respectively fixed by an external bearing cover, an internal bearing cover, a bearing retaining ring and a V-shaped ring; an external fan is installed at the rear tail end of the rotor and is fixed by the bearing retaining ring; a fan housing is fixed on the rear end cover and covers the external fan; and a key is installed in a key slot at the front end of the rotor. The medium-sized high-voltage three-phase asynchronous motor is characterized in that the rotor is also provided with an internal fan, the internal fan is located inside the casing and fixed by the bearing retaining ring, and the internal fan, a rotor ventilating slot and a ventilation passage on the casing form an internal circulating cooling wind path. The invention has compact and reasonable structure, good heat dispersion, low operation noise, high strength, and safe and reliable operation.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a medium-sized high-voltage three-phase asynchronous motor. Background technique [0002] Y2 series medium-sized high-voltage three-phase asynchronous motor is a medium-sized high-voltage motor with a full heat sink structure. Since its appearance in the mid-1980s, this type of motor has been characterized by compact structure, small size, high operating index, low noise and small vibration. , low manufacturing cost and convenient maintenance have won the favor of users. It has become the mainstream product of medium-sized high-voltage motors in the world, and plays an important role in many industrial fields such as papermaking, electric power, water treatment, petrochemical, steel, and mining. But this type of motor also has the following defects: (1) the temperature distribution inside the motor is uneven during axial ventilation; (2) the vibration and noise generated by the mo...

AI Technical Summary

Problems solved by technology

However, this type of motor also has the following defects: (1) the temperature distribution inside the motor is uneven during axial ventilation; (2) the vibration and noise generated by the motor are relatively large during operation; (3) the overall structure of the casing is single, and the strength And the heat dissipation capacity is not ideal; (4) The bearing capacity of the traditional bearing structure is not good, and the reliability of the motor operation is not strong

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