A core-piercing method for an extreme short-axis hydraulic motor

Abstract

A limit short shaft hydraulic motor core pulling method comprises the following steps of preparing to install a short shaft, namely after a buffer isolating plate is plugged between a motor stator anda rotor, hoisting the entirety to a core pulling place; then connecting a short shaft with one end of a shaft coupling; selecting a limit point at the core pulling place, wherein the limit point is the reference of the placement position of the stator, enabling the short shaft of the rotor to get close to a wall but not to press against the wall, and the distance between the limit point and another one wall to be greater than the sum of the length of the stator, the length of the rotor and the length of the short shaft; overall hoisting to move a motor to the position of the limit point; adopting a three-level core pulling method, using a hydraulic gantry crane to hoist, and moving towards a direction reverse with the limit point, wherein one hoisting rope successively takes a position close to the rotor shaft coupling as a hoisting point, a point on the short shaft as the hoisting point and the position close to the magnetic pole of the rotor as the hoisting point to translate the rotor in an endless relay manner, so that the rotor and the short shaft are communicated and are moved out of the stator together, namely, a core is pulled.

Description

technical field

[0001] The invention belongs to the technical field of large-scale motor maintenance, and in particular relates to a core-piercing method for an extreme short-axis hydraulic motor. Background technique

[0002] In the dismantling process of the large main drive motor, the method of extracting (threading) the core of the main motor is the most critical step, which is the most difficult, time-consuming and labor-intensive step. There are many methods for extracting (piercing) the core of the main motor of the rolling mill, but they are basically not applicable to the rough rolling motor of the hot rolling production line. The reason is that the rough rolling motor room is usually arranged in a place without a large crane, the space is narrow, and there are many unfavorable factors such as the lack of available sites for motor pumping (threading) cores. At present, for this type of motor, the usual construction method of core pumping (piercing) mostly adopts th...

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