Compressor repair case background

Recently, the client sent a compressor to turn on the scene for 50 minutes on the spot, and the failure was stopped, which needed maintenance. After the disassembly and inspection of the maintenance department of our factory, I found that the thrust bearing of the two rotors of the exhaust end was damaged, the droplets were deformation. From the perspective of the damage of the bearings, for the dry friction of the oil deficiency, other bearing also had an oil film. The oil is not injected to each lubricating point, so the bearing is the root cause of the failure due to damage to the oil -free operation.

Fault cause analysis

After the equipment disintegrates, the technical department analyzes the use of oil filtration

1. About the installation method of on -site oil in and out of oil.

When disassembling the head of the machine, I found that the oil filter seat installation method at the oil cooler is upside down during the test machine (the oil pressure joint faces the oil joint at the test machine, the oil pressure joint faces the on -site operation). The monitoring of the oil pressure point is the oil pressure before the oil filter, and there are hidden dangers in the installation method of on -site oil;

On -site installation method: 2#is oil inlet, 1#is oil out, and the oil input and oil pressure monitoring point is the same system

Normal installation method: 1#is oil inlet, 2#is oil out, and oil and oil pressure monitoring points are the same system pipeline

2. About the return valve.

The normal situation of oil filtration is the pores around the pores. After filtering through the filter element, the oil is produced from the middle main hole. The on -site shutdown inspection found that the inlet and out of the oil pipe was reversed. It was the main hole in the oil. Due to the existence of the stop valve, the surrounding holes could not be produced, and a normal circulation could not be formed. Essence Therefore, in order to prevent the system from installing errors in and out of the oil pipes, the measures that the system cannot lubrically lubricates normally. The measures that can be taken are: one is to mark the installation port of the inlet and out of the oil pipe to prevent the installation of errors; Filter, even if the inlet and out of the oil pipe is installed, the system can be lubricated normally.

So, what is the effect of oil filtration and what is his structure?

The structure of oil filter generally includes filter element, shell and sealing parts. When the compressor is running, the lubricant is in the shell of the inhaled oil filter, and then filter through the filter element. As the core component of the oil filter, the main role is to block the solid particles, metal dandruff, and sediment in the oil, and ensure the purity of the oil. The manufacturing materials of the filter element include fiber materials, metal nets, ceramics, etc. They have different filtering accuracy and filtering efficiency. In order to ensure that oil filtration is continuously effective, it is necessary to replace regularly.

Finally, talk about oil filter suggestions for replacement cycle

According to the working conditions, the compressor is generally recommended to replace the lubricating oil every 4000H. Each time the lubricant is replaced, it must be replaced or clean oil filter. In addition, you need to use a band wrench or similar tools for disassembly.

When installing new oil filter, use a small amount of lubricating oil to lubricate the dense ring, and tighten the filter screw with your hands. When the lubricant is hot, do not change the oil filter! Dangerous burns!