The senior engineer said that there are 13 problems that cause the compressor failure of the ice making machine. Today we will talk about the principles and improvement measures of the compressor failure caused by 3 problems in the crankcase.

Firstly,  a large amount of foam is generated in the crankcase

Overhaul ideas

The lubricating oil in the crankcase foamed and liquid hit was caused by the following two reasons:

1. There is a large amount of ammonia liquid mixed in the lubricating oil. When the pressure drops, the ammonia liquid will evaporate and cause a lot of foam.

For this, the ammonia in the crankcase should be evacuated.

2. There is too much lubricating oil in the crankcase, and the big end of the connecting rod stirs the lubricating oil and causes a lot of foam.

For this, the excessive lubricating oil in the crankcase should be released to make the oil level reach the specified oil level line.

Second, the pressure in the crankcase increases

Overhaul ideas

1. The piston ring is not tightly sealed.

The sealing ring is not tight, which leads to high pressure to low pressure. The new piston seal ring should be replaced.

2. The exhaust valve is not closed tightly, causing the pressure in the crankcase to rise.

The air tightness of the exhaust valve seat should be checked. If the seal is not tight, a new valve should be replaced in time.

3. The airtightness between the cylinder liner and the machine base has deteriorated.

The cylinder liner should be removed, the joint should be cleaned and sealed, and then reassembled.

4. Too much ammonia enters into the crankcase and the pressure rises after evaporation.

As long as the excessive ammonia in the crankcase is evacuated.

Thirdly, there is a knocking sound in the crankcase of the compressor of the ice maker

Overhaul ideas

1. Check whether the gap between the connecting rod head bush and the shaft journal is too large.

At this time, the gap should be adjusted or replaced with new tiles directly.

2. If the gap between the main bearing and the main journal is too large.

This will cause collision and friction, which will produce knocking sound, and the tiles should be repaired or replaced.

3. Check whether the split pin is broken and the connecting rod nut is loose.

If yes, replace the cotter pin with a new one and tighten the connecting rod nut.

4. If the center of the coupling is not right or the keyway of the coupling is loose.

The coupling should be adjusted or the keyway should be repaired or replaced with a new key.

5. The main bearing steel ball is worn and the bearing frame is broken.

For this, replace the bearing with a new one.