【Answer】  ①, turn the bend: the rotor out and according to the specific circumstances to be corrected; ②, the axis of the core file wear and tear: the core should be at both ends of the shaft to open a ring slot, and then into the two arc keys And with the shaft welding together; ③, journal wear: generally can be in the journal at the flower processing. If the wear and tear, but also in the journal with a layer of welding accumulation, and then lathe processing to the required size. ④, shaft crack: more serious should be replaced.

 

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