What are the symptoms and consequences of overfilling the compressor with oil?

There are oil marks on it; just fill it to the specified level. If too much is added, the oil will simply spill out, through the exhaust pipes and so on

Reversible compressors use oil lubrication – oil is injected into the cylinders. What the moderator means is, where is the fuel gauge? ? On the oiler? This post was last edited by Young Builder on 2009-3-5 20:39.]

Excessive oil injection can cause oil to accumulate in the cylinder, resulting in liquid slugging, abnormal noises from the compressor, and damage to the valve seats.

1. When the valve is disassembled, oil leaks out. Can you be sure it’s due to excessive oil injection rather than oil carried in the process gas? 2. Needless to say, using too little oil will lead to increased wear of the piston rings, support rings, and piston rod packing; it will also cause higher vibration levels, greater gas leakage, and elevated temperatures. 3. Needless to say, pouring too much oil is first and foremost a waste ； This time, liquid slugging is likely to occur, which affects the vibration of the machine and the lifespan of the air valves.

It has been confirmed that it is not oil from the processing process, but rather the lubricating oil supplied by the unit’s oil injector. Additionally, what symptoms usually occur before excessive oil injection leads to serious consequences? ? ?

The unit should experience increased vibration and rising temperatures, right?

Typical phenomenon: there is a sound similar to that of metal hitting! And the vibration is very strong. If the lubricating oil enters the cylinder and is not quickly expelled during the exhaust process, it will be compressed as the piston approaches the top dead center, resulting in a sudden increase in hydraulic pressure. This is water hammer. Water hammer can cause damage to components subjected to compressive forces (such as valve plates, pistons, connecting rods, crankshafts, piston pins, etc.) in a very short time, and it is a deadly threat to reciprocating compressors.

First of all, I say that it’s not scary for oil to leak out when the valve is removed; what matters is how much oil leaks! Adding too much oil increases the likelihood of liquid slugging; this generally does not happen, as some of the oil is carried away by the airflow to the outlet buffer tank through the vent valve. In fact, the most harmful one is the exhaust valve, followed by the intake valve ； Because the viscosity of the oil injected into the cylinders is relatively high, a viscous force is generated between the valve plates and the valve seats, resulting in a delayed opening time for the intake and exhaust valves. The amount of oil to be used should be specified in the compressor’s technical specifications; generally, 15 to 25 drops is sufficient. Too little oil can lead to accelerated wear of the piston rings, and in severe cases, it can cause damage to the cylinder walls. If too much oil is used, it won’t have time to be expelled through the exhaust valve and will accumulate inside the cylinder, which in extreme cases can cause liquid slugging (this usually doesn’t happen, unless no one adjusts the oil amount).

As a supplementary point, high compressor exhaust temperature can also lead to carbon buildup in the pipelines.

Liquid hammer generally does not occur. The most problematic component is the exhaust valve, as it operates at high temperatures. The viscosity of the oil causes the valve disc to stick to the valve seat, resulting in uneven opening and closing of the valve disc – a phenomenon known as tilting. This ultimately leads to excessive stress on one side of the valve disc, causing fatigue fractures in that area, which is manifested as an increase in the exhaust temperature.

If too much oil is used, bubbles will form during prolonged operation; the oil will escape, and the heat generated cannot be dissipated, which can easily cause the bearings and the engine body to overheat, damaging the compressor and shortening its lifespan