1 oil separation core is damaged.
During the operation of screw air compressor, the oil separation core is damaged such as breakage and perforation, and then it loses the function of oil-gas separation. That is to say, the mixture gas and air compressor exhaust pipe directly through, then a large number of cooling oil has not been separated, will be exhausted with the gas together with the body, resulting in the exhaust process with oil failure.
2 failure of oil return line.
In the working process of the screw air compressor, the oil return pipeline shoulders an important responsibility. The pressure difference between the oil separation core and the air compressor inlet forms. Under the action of this pressure difference, the oil return pipeline is responsible for transferring the oil gathered at the bottom of the oil separation core back to the air compressor and in the next cycle process. Continue to use. If the return circuit is blocked, broken and incorrectly installed, the oil gathered at the bottom of the oil separation core can not be transported back to the air compressor, resulting in excessive oil backlog at the bottom, then this part of the oil not transported back to the air compressor will be discharged with the gas, there will be oil during the exhaust process. Elephants.
3 system pressure control is too low.
In the running process of screw air compressor, if the system pressure is too low, the centrifugal force in the separator will be less than the centrifugal force required by the work, then the function of the separator will not be fully embodied, and the oil content of the gas in the core of the separator will be too high to exceed the separation range. It also led to the incomplete separation of oil and gas, and there was an oil fault in the exhaust process of the air compressor.
4 minimum pressure valve failure
In the operation process of screw air compressor, the function of minimum pressure valve is to ensure that the system pressure is controlled above the minimum pressure in the operation process. If the minimum pressure valve fails, then the minimum pressure of the system will not be guaranteed, because the gas consumption of the gas transport equipment is very large, it will cause the system pressure is too low, the return pipeline can not return oil. Oil gathered at the bottom of the oil separator core will not be able to return to the air compressor, with the compressed gas discharged from the air compressor, resulting in flat discharge process with oil fault.
5 too much cooling oil is added to the air compressor.
Before the screw air compressor runs, too much cooling oil is added, which is beyond the scope of the air compressor. During the operation of the air compressor, the oil level is too high, although the separation system separates the oil from the oil, but in the discharge of the gas, the gas will also take the cooling oil into the gas and discharge it into the gas. The oil content in the exhaust gas is too high and there is an oil fault.
6 the quality of cooling oil is not qualified.
Before the air compressor runs, it can not achieve the cooling effect by adding unqualified cooling oil, or the cooling oil exceeds the applicable time. So in the operation process of screw air compressor, the cooling oil loses its role and can not separate the oil and gas cooling. Then there will be an oil fault in the exhaust process.