Method for core-crossing hanging large-scale motor hydraulic ram lifting

Abstract

The present invention relates to a method for installing the large-scale electric motor, and especially to a method for coaxially hanging the large-scale electric motor. The method comprises the following procedures: a procedure 1, surveying on site to ensure the installing position of the rail of the hydraulic jacking device, and measuring the service performance of the hydraulic jacking device;a procedure 2, hoisting and unloading the stator of the electric motor, hoisting the stator with the hydraulic jacking device, and orienting the orientation of the load side of the stator; a procedure 3, hoisting and unloading the rotor of the electric motor and installing an extended shaft, hoisting the rotor with the hydraulic jacking device, and installing the extended shaft on the coupler of the rotor with a travelling crane; a procedure 3, core pulling, regulating the central height of the rotor, moving the hoisting device on which the rotor is hanged to pull the rotor on the stator; anda procedure 4, installing the electric motor to the right position. The method of invention overcomes the conditional restriction that the hoisting capacity of the travelling crane between the vehicles is not enough and the clearance height of the clearance height is not enough. The method of the invention overcomes the restriction of the space at the circumference of the base of the electric motor, smoothes the hoisting operation and saves the working procedure of adjusting at the installing position of the electric motor.

Description

technical field [0001] The invention relates to a method for installing a large motor, in particular to a method for hoisting a large motor through a core. Background technique [0002] There are many occasions where large motors are used, such as steel rolling production lines. With the wide application of frequency conversion speed regulation technology in the main drive system of large rolling mills, the power of a single AC variable frequency motor has reached 10,000kW, the lifting weight of the motor rotor is more than 70 tons, the weight of the motor stator is more than 40 tons, and the total weight of the motor is more than 110 tons. Due to the limitation of transportation weight, this type of motor is generally transported by the stator and rotor of the motor, and assembled at the installation site with core piercing. The existing core-through assembly technology generally uses bridge cranes or large truck cranes in the workshop for hoisting operations. However, du...