The compressor crankshaft is a very important part of the compressor. There are many demands for compressor crankshafts in life, and reasonable selection and use of compressor crankshafts have become very important. Many manufacturers and consumers have a lot of demand for compressor crankshafts. So what is the situation of compressor crankshaft out of tolerance? How to deal with it?

Treatment method of compressor crankshaft out of tolerance:

The out-of-tolerance difference of the compressor crankshaft is a concrete manifestation of wear. Generally, when the wear amount is ≤0.05mm, the roundness and cylindricity difference is manually eliminated; when the wear amount is >0.05mm, the roundness and cylindricity difference is removed by machining , Machining is performed on crankshaft grinders and special machine tools, with high machining accuracy

⑴Manual repair method

1. Measure the direction and position of the roundness and cylindricity difference of multiple points, and make a mark on both sides

2. File by hand with a fine flat file, and measure while filing, knowing that the roundness and cylindricity difference of the journal is less than the allowable value

3. Use a cloth tape with the same width as the length of the journal, put 0# emery cloth on it, and stick it on the side of the journal to be ground

4. Two people pull the cloth belt on both sides to make a 60° angle, cooperate with pulling the cloth belt to make a reciprocating motion. After grinding one side, grind the other side, and measure the journal. The difference in roundness and cylindricity is less than the allowable value

5. Wrap double 0# emery cloth around the entire journal, and use hemp rope around the emery cloth a few times

6. The two people pull the hemp rope by hand, cooperate with the hemp rope to do reciprocating motion, and grind the journal

7. Wrap metallographic sandpaper around the entire journal, and use hemp rope around the sandpaper several times

8. Two people pull the hemp rope by hand, cooperate with the hemp rope to do reciprocating motion, polish the journal

⑵Manual repair method

1. The special grinding tool for machining, the width is equal to the journal, the inner diameter is equal to the maximum value of the journal, and there is a gap of 2~3mm on the center split

2. Apply colorant to the inner hole of the abrasive

3. Put the abrasive tool on the journal, grind it back and forth several times, and remove it

4. Use a flat file to file away the colorant on the journal

5. Repeat the above steps 2, 3 and 4 until the roundness and cylindricity difference of the measured journal is less than the allowable value

6. Use step 3 to step 8 of method one to improve the surface roughness of the journal and polish the journal

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