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Motor broken shaft reconnection technology

A technology for motor rotor shafts and broken shafts, which is applied in the manufacture of motor generators, shafts, electrical components, etc., can solve problems such as rotor guide bar microcracks, deformation, and motor performance damage, so as to ensure performance, reduce use costs, and improve The effect of utilization

Inactive Publication Date: 2017-02-08
NINGXIA NORTHWEST HORSE ELECTRIC MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the process of taking out the shaft of the press, the mechanical pressure will loosen the rotor punch, and the rotor guide bar will be micro-cracked and deformed, which will have a great impact on the performance of the motor.

Method used

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  • Motor broken shaft reconnection technology

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Embodiment Construction

[0023] The invention provides a motor broken shaft reconnection process comprising the following process steps:

[0024] Step 1, select the reconnection point, select the root of the motor bearing as the reconnection point between the shaft extension and the original motor rotor shaft end;

[0025] Step two, see figure 1 , the part where the shaft extension 1 is connected to the shaft end 2 of the original motor rotor adopts shrink fit interference fit; through mechanical analysis, the small diameter interference fit ensures the transmission torque, and it is verified by practice that d=(0.38~0.43)D, L= 0.9d, interference fit 0.08 ~ 0.12, this data formula can best reflect the maximum transmission torque and strength. The shaft extension material selected in the present invention is the same as the original shaft material of the motor.

[0026] Step 3, please refer to figure 2 , use a heating furnace to heat the shaft extension 1 to 200 degrees Celsius, continue heating fo...

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Abstract

The invention discloses a motor broken shaft reconnection technology. The motor broken shaft reconnection technology comprises steps 1, choosing a reconnection point and choosing a blocking root part of the motor bearing as a reconnection point between a shaft extension portion and an original motor rotor shaft end, 2 adopting a hot charging interference fit on a portion where the shaft extension portion is connected to the shaft end of the original motor rotor shaft end, 3, adopting a heating furnace to continuously heat the shaft extension part to 190 degree to 210 degree for 30-40 minutes and sleeving the shaft extension portion into the original motor rotor shaft end in a hot charging manner, 4, performing surfacing on a crevasse part of a seam after the shaft extension portion to be hot charged is cooled down, and 5, placing the rotor on a lathe after the welding portion of the shaft extension portion is cooled down and processing the portion of the connected shaft into an original shaft size which is originally needed so as to finish motor broken shaft reconnection. The invention discloses the motor broken shaft reconnection technology, and the motor which is repaired by the motor broken shaft reconnection technology can satisfy a stress requirement for the broken portion of a normal shaft extension portion, improves a motor utilization rate and reduces a motor usage cost.

Description

[0001] Technical field: [0002] The invention relates to the technical field of motor maintenance, in particular to a motor shaft reconnection process. [0003] technical background: [0004] Most of the mining machinery operates under heavy load conditions, and the motor shaft extension is often broken due to overload, and the equipment stops, causing direct economic losses. When the motor is returned to the repair shop, the motor shaft is often ejected from the rotor with a press, and then replaced with a new motor shaft. Due to the interference fit between the shaft hole and the shaft of the cast aluminum rotor of the motor, the shaft is hot-fitted in while the product is being manufactured. Therefore, in the process of taking the shaft of the press, the mechanical pressure will loosen the rotor punching plate, and the rotor guide bar will be micro-cracked and deformed, which will have a great impact on the performance of the motor. [0005] Invention content: [0006] I...

Claims

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Application Information

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IPC IPC(8): H02K15/00
CPCF16C3/02H02K15/0006
Inventor 刘晓军杨进喜雷亚喜
Owner NINGXIA NORTHWEST HORSE ELECTRIC MFG
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