Assembling method of large box type high-voltage asynchronous motor

Abstract

The invention relates to an assembling method of a large box type high-voltage asynchronous motor, in particular to a motor assembling method for performing processing when partial processing procedures of a motor rotating shaft are transferred to motor assembling. The assembling method mainly solves problems of large reworking amount and cost increasing caused by faults in partial motor part matching due to dimensional tolerance accumulation of all parts in the production process of the large box type high-voltage asynchronous motor. The assembling procedures of a rotor and a stator of the motor are as follows: the rotor is hoisted into the stator, an outer cover of a bearing at the non-shaft-extension end of the motor rotor is assembled, fixing holes of water throwing rings at two ends of a shaft of the motor rotor are punched, oil seals at two ends of the shaft of the motor rotor are assembled, the water throwing rings at the two ends of the shaft of the motor rotor are assembled, a motor end cover is assembled, a motor outer fan is assembled, an air cooler is assembled, and a finished product is tested. The assembling method avoids motor reworking, reduces reworking expanse, and simultaneously can reduce cable waste and production cost due to the fact that a motor lead-out wire is welded during whole motor assembling.

Description

technical field [0001] The invention relates to an assembly method of a large box-type high-voltage asynchronous motor, in particular to a motor assembly method in which part of the processing process of the motor shaft and the process of welding the lead wires of the stator core with windings are transferred to the motor assembly process for processing. Background technique [0002] At present, in the production process of large-scale box-type high-voltage asynchronous motors, the known process methods are: [0003] 1. Rotor equipment: [0004] Shaft blanking—flat end face—drilling center hole—turning the outer circle—grinding the outer circle—drilling the water ring fixing holes at both ends—pressing the rotating shaft into the cast aluminum rotor core—turning the outer circle of the iron core ——Set balance plate——Set fan——Dynamic balance test——Install the bearing devices at both ends (bearing inner cover, bearing, oil throwing ring, etc.)——Install the shaft extension en...

AI Technical Summary

Problems solved by technology

[0009] It can be seen from the above rotor assembly process that the rotor is processed first, that is, before the motor is assembled, the rotor has been processed into a finished product. Since the size of the large box-type high-voltage asynchronous motor is generally large, reaching more than 2 meters, The accumulation of dimensional tolerances of various parts leads to the axial interference of some parts of the motor, such as the water throwing ring rubbing the V-shaped sealing ring, resulting in abnormal noise in the motor, or the parts cannot be in good contact and cooperation, such as the water throwing ring and the V-shaped sealing ring. The exposed seam of the sealing ring cannot be touched, resulting in waterproof failure. The fault phenomenon is often reflected when the motor is put into the test after the assembly is completed, so the rework of the motor production is large, especially when the motor is equipped with an external fan at the non-shaft end. The outer fan, end shield and other parts must be disassembled first when processing. The amount of rework is large and disassembly is difficult, which will definitely affect the production schedule and normal delivery of the motor, and reducing the tolerance range of each component will cause difficulties in controlling the machining accuracy. Increase processing cost and prolong processing cycle

[0010] In addition, it can be seen from the stator assembly process that the known process method is to first remove the stator from the assembly line, connect the wires, and then weld the lead wires after dipping the paint. Because the overall size of the large box-type high-voltage asynchronous motor is generally large, reaching more than 2 meters, and The direction of the stator phase lead-out wires and the junction box is not fixed, so there is a large margin for the lead-out wire cables. When the motor is assembled and the stator is hoisted into the frame, the excess cables will be cut off when the lead-out wires are connected to the junction box, which will cause cable waste. , increasing the production cost

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