Drop in oil pressure of diaphragm compressor
Thread Content
The oil pressure of the diaphragm compressor was 3 kilograms when it first started, but after 3 hours it dropped to 1.2. What could be the reason? Could it be that the viscosity of the oil is too low? Use Great Wall 46 anti-wear hydraulic oil
First, rule out the possibility that the pressure drop is caused by the oil cooling down and then heating up~~ Generally, the lubricating oil pressure in membrane compressors is adjustable; this can be done by adjusting the relief valve~~
Lubricating oil pressure at the large and small ends of the connecting rod as well as at the crosshead
Let’s first see the effect of adjusting the relief valve~~
After the chiller is started, the oil temperature will rise, and the lubrication oil pressure will decrease; once it reaches a stable level, the oil pressure will remain constant, and this is considered normal. As for the viscosity of the oil, grade 46 is a bit too low for compressors; however, there is no problem if it is used in accordance with the instructions. If the oil pressure drops to a level that is insufficient for normal operation, the lubrication system needs to be carefully inspected. Such as filters, etc
Hey, he’s not talking about the oil pressure at the diaphragm.
I’m talking about gear pumps too~~ Hehe~~ There should be adjustment screws to regulate the opening pressure of the safety valve (overflow valve) at the pump’s outlet~~
It should be there; for the safety of the gear pump, carefully look for an adjustment screw~~
The worst thing to do is to inspect the gear pump to see if it’s severely worn, which could lead to excessive gaps and an inability to generate pressure~~
You could try using lubricant with a higher viscosity; if that doesn’t work, consider whether the control valve at the cylinder is malfunctioning or if the gap between the piston rings has increased