Online core-pulling device for large motor and using method thereof

Abstract

The invention relates to an online core-pulling device for a large motor and a using method thereof, the device comprises at least two core-pulling devices, a fixing device is detachably connected between two adjacent core-pulling devices, and each core-pulling device comprises a frame slidably connected to the ground,the support cross beam is arranged above the frame, a first jacking device is arranged between the support cross beam and the frame,one end of the hoisting device is fixedly connected with the support cross beam, the other end of the hoisting device sequentially penetrates through the support cross beam and the frame, and the other end of the hoisting device is arranged on a rotor of the motor in a sleeving mode. According to the invention, overall offline of the motor can beavoided, the machine-team cost of machinery is saved, the maintenance time and personnel can be greatly reduced, the maintenance cost is reduced, the motor core-pulling inspection processing requirements can be effectively met, and the operation is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of a motor, more specifically, it relates to an online core-pulling device for a large motor and a method for using the same. Background technique [0002] Due to the defects in the early design and manufacture of the old main drive motor, the design strength of the rotor pole bolts is relatively low. During the maintenance of the main drive motor project, it is often necessary to replace the new or stronger magnetic pole bolts; When the motor was in normal operation, the magnetic pole bolts suddenly broke, causing the motor to automatically power off and directly affecting the production plan of the steel mill. [0003] In the maintenance process of large motors, take the main motor of a two-roller machine as an example. The motor power is 4800KW, the stator weighs 43.8t, and the rotor weighs 53.5t; Due to the limitation, it takes a long time to dismantle the motor as a whole and go off-line for core-pulli...

AI Technical Summary

Problems solved by technology

[0002] Due to the defects in the early design and manufacture of the old main drive motor, the design strength of the rotor pole bolts is relatively low. During the maintenance of the main drive motor project, it is often necessary to replace the new or stronger magnetic pole bolts; When the motor is in normal operation, the magnetic pole bolts suddenly break, which leads to the automatic power-off of the motor and directly affects the production plan of the steel mill.

[0003] In the maintenance process of large motors, take the main motor of a two-roller machine as an example. The motor power is 4800KW, the stator weighs 43.8t, and the rotor weighs 53.5t; Due to the limitation, it takes a long time to disassemble the motor as a whole and go off-line for core-pulling inspection, which seriously affects the output of the production line, so it is very necessary to improve the current situation

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