Special tool for internal expansion type hoisting of motor stator core and working method of special tool

Abstract

The invention provides a special tool for internal expansion type hoisting of a motor stator core. The special tool comprises a mandrel, a cylinder, rams, expansion plates, ram reset devices and a mandrel driving device, wherein a plurality of open grooves are evenly distributed in the side wall of the cylinder in the circumferential direction, each ram comprises a sliding segment and a working segment, the joint of each sliding segment and the corresponding working segment is a step surface, each ram reset device is arranged between the corresponding step surface and the side wall of the cylinder, the outer end of the sliding segment of each ram is fixedly connected with one expansion plate, a ring body with a notch is defined by the multiple expansion plates, the outer diameter of the ring body is smaller than the inner diameter of the motor stator core, the mandrel is driven by the mandrel driving device to do axial reciprocating motion, the rams drive the expansion plates to expandoutwards in the radial direction under the driving of conical segments of the mandrel, and the rams drive the expansion plates to retract inwards in the radial direction to be reset under the drivingof the ram reset devices. According to the special tool, the expansion action is performed through wedge-shaped matching between the mandrel and the rams, the structure is simple and compact, workingis stable, the automatic reset function is achieved, repeated hoisting can be realized in a short time, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a hoisting tool, in particular to a special hoisting tool and a working method thereof of an inner-expanding type of motor stator core. Background technique [0002] The stator is one of the key parts of the generator, and its assembly quality directly affects the overall performance and service life of the generator. According to the generator model, the stator of the generator must be pressed into the specified position in the frame from the driving end or non-driving end of the frame. At this position, the rotor can be correctly aligned with the stator after the assembly, and the two ends of the rotor journal The position where the correct gap is formed with the bearing bush of the sliding bearing is also the position of the magnetic centerline of the stator and rotor. If the assembly is not good, it will directly lead to the decline of the heat dissipation performance of the motor, the decrease of the motor capacity, the i...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a special tool for lifting the stator core of the motor and its working method, which is used for the transportation of the stator core during press-fitting, and solves the problem of difficult transportation of the stator core of the motor

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