Motor shaft replacing tool and shaft replacing method thereof

Abstract

The invention relates to a motor shaft replacing tool and a shaft replacing method thereof. A fixing framework of the shaft replacing tool consists of an upper press plate (5), a lower press plate (7) and a pull rod (2), wherein the upper press plate (5) and the lower press plate (7) are symmetrical and are provided with center holes. The diameter of the center holes of the upper press plate and the lower press plate is not smaller than the diameter of a motor rotary shaft. The insides of the upper press plate and the lower press plate are symmetrically provided with clamping pieces (6) which are arranged besides the center holes, and the height of the clamping pieces is higher than a winding end (3) of a motor rotor. The shaft replacing method has the following steps of: sheathing the upper press plate and the lower press plate on the motor rotary shaft from both ends of the rotor through the center holes; clamping a rotor core by the clamping pieces; disassembling an axial positioning circular key from the motor rotary shaft; pressing the motor rotary shaft out; pressing the new motor rotary shaft into the center holes of the lower press plate, the rotor core and the upper press plate; installing the axial positioning circular key; and disassembling the shaft replacing tool. The invention is convenient to replace the rotary shaft of the motor rotor, is difficult to damage the winding insulation of the motor rotor, and is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of motor shaft exchange. Background technique [0002] High voltage wound rotor motors are widely used in actual production because of their excellent starting performance. Due to the long-term alternating heavy load operation of this type of motor, the bearings and rotating shafts of the shaft system are more prone to failure. If the bearing fails, it is easier to replace it. The rotating shaft is prone to bending deformation, crack deformation and even breakage. If these failures occur, the rotating shaft can only be replaced. [0003] The rotor structure of the high-voltage wound rotor motor is special. The manufacturing process is to first laminate the stamping sheet on the shaft, and then carry out the embedding, insulation and dynamic balancing treatment. In the prior art, the shaft replacement of the rotor of the wound rotor motor is based on the structure of the rotor, and the rotor is pressed fro...

AI Technical Summary

Problems solved by technology

In the prior art, the shaft replacement of the rotor of the wound rotor motor is based on the structure of the rotor, and the rotor is pressed from the ventilation hole with bolts, or the rotor is clamped from the inner circle with a clip, which is inconvenient for clamping, hoisting and turning over. Moreover, the safety and reliability cannot be guaranteed, and it is very easy to cause damage to the winding insulation and fall short.

In order to ensure the recovery of the function of the motor after the repair, during the shaft replacement process, the original winding insulation must be protected from damage, the lamination coefficient of the iron core will basically remain unchanged, and it is also convenient for clamping, hoisting and turning over. Technology is more difficult to meet these requirements

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