How to maintain the chiller lubrication system

The most common faults in the chiller lubrication system are: no pressure on the pump, pressure regulation failure and a sharp swing of the gauge pointer. The main reasons are:

1, the system is seriously leaking.

2. The oil pump works for a long time, the pump wears seriously, the internal leakage is too large, and the volume effect is obviously reduced.

3. The oil temperature in the crankcase is too low, the viscosity of the frozen lubricating oil is too large, the filter inlet filter of the pump is too dense, the filter element is blocked, and the oil level is too low, and the oil pump is difficult to suck, causing suction.

4. The pressure regulating valve core is stuck in the open position or the spring of the pressure regulating valve is invalid.

From the following aspects, it can be determined whether the chiller lubrication system is normal:

1. The oil level in the crankcase should be sufficient and should be stable for a long time.

2. The oil temperature in the crankcase should be kept between 10 and 65 °C. The most suitable working temperature is 35-55 °C.

3. The filter element of the oil filter should not be blocked. The fine oil filter with differential pressure should have a blocked indication.

4. The oil pressure gauge is specified to be stable. The indicated pressure should be 0.05-0.3MPA higher than the suction pressure for the piston or freezer, and 0.2-0.3MPa higher than the condensing pressure for the screw freezer.

Pay attention to the following points in the maintenance of the chiller lubrication system:

1. Pay attention to observe whether the oil level, oil temperature and oil pressure are normal during daily inspection.

2. Regularly check the oil quality according to the oil change index specified by the frozen lubricating oil, and replace or replenish the filtered new oil.

3. During the middle and overhaul, pay attention to check and adjust the end face clearance of the oil pump. If necessary, the pump should be replaced. The end face clearance of the pump is about 0.03-0.08mm depending on the size and size. For the specific values, please refer to the assembly technical requirements and factory regulations of the pump.

4. Regularly replace or clean the filter element, piping and crankcase.

The technical requirements for the maintenance of the chiller lubrication system are strong, mainly related to the performance of the compressor mainframe. It is recommended that the maintenance be carried out by professionals to avoid unnecessary losses.