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7 reasons for high oil consumption of air compressors

Release time:2023-02-04 Reading volume:
1. Irregular design of oil and gas separation tank

Some air compressor manufacturers, when designing oil and gas separation tanks, the design of the primary separation system is unreasonable, the primary separation effect is not ideal, the concentration of the oil mist before the oil is high, the oil load is too heavy, the processing capacity is insufficient, and the fuel consumption is caused. Too high. No matter how good the operation technique is after buying such a product.
2. Too much fuel
The refueling volume exceeds the normal oil level, and part of the engine oil is taken away with the airflow, resulting in excessive fuel consumption. Some people may not pay attention to this simple reason.
3. Large air consumption, low-pressure use with overload
Low-load use means that when the user uses the air compressor, the exhaust pressure does not reach the rated working pressure of the air compressor itself, but it can basically meet the gas requirements of some corporate users, for example: corporate users add gas equipment, The increase in air consumption makes it impossible for the air compressor's exhaust capacity to balance with the user's air consumption. Assuming that the air compressor has a rated exhaust pressure of 8kg/c㎡, the pressure in actual use is only 5kg/c㎡ or even lower. The compressor is under load for a long time and cannot reach the rated pressure value of the machine, resulting in an increase in fuel consumption. The reason is that under the condition of constant displacement, the flow rate of the oil and gas mixture increases when passing through the oil, and the oil mist concentration is too high. Increase the oil load and eventually lead to a large fuel consumption.
4. The oil return line is blocked
When the oil return pipe (including the check valve on the return pipe and the oil return filter) is blocked by foreign matter, the oil condensed at the bottom of the oil separator after separation cannot return to the machine head, and the condensed oil droplets are blown up by the airflow. It is taken away with the separated air. These foreign objects are usually caused by solid impurities that fall off during installation.
5. The oil return check valve is damaged
If the oil return check valve is damaged (from one-way to two-way), the internal pressure of the oil separator tank will pour a large amount of oil back into the oil separator through the oil return pipe after the machine is stopped. The oil inside the oil separator will not be able to The machine head is sucked back in time, causing part of the oil to run out of the air compressor with the separated air (this situation is common in machines that do not have an oil circuit stop valve and a machine head exhaust outlet check valve).
6. Improper installation of oil return pipe
When replacing, cleaning, and repairing the air compressor, the oil return pipe is not inserted into the bottom of the oil separator (reference: 1~2mm from the bottom of the oil separator is better), resulting in the separated oil cannot be returned to the machine head in time, and the accumulated oil will follow. Ran out with compressed air.
7, the smallest pressure valve failure
If there is a leakage point in the seal of the minimum pressure valve or the minimum pressure valve is opened in advance (due to the design opening pressure of each manufacturer is different, usually the range is between 3.5~5.5kg/c㎡), then the machine will establish the oil and gas tank pressure in the early stage of operation The time will increase. At this time, the gas oil mist concentration in the low-pressure state is high, the flow rate is fast when passing through the oil, the oil load is increased, the separation effect is reduced, and the fuel consumption is large.