Air compressor failure analysis: coking
The coking of the head of the screw air compressor will lead to accidents. Part of the reason is that the mixed use of new oil and old oil accelerates the oxidation process of the oil. For this reason, we must pay attention to the maintenance of the air compressor and put the oil clean. .
Most of the current air compressors use mineral oil or semi-synthetic oil based on mineral oil, and the service life is generally between 2000-4000 hours. This kind of oil will generally coke after about two years of operation. At the same time, this kind of scene will occur even in normal oil change. It is impossible for the screw air compressor to clean the sink oil because of the oil change. A new round of oil circulation will cause oil deterioration and coking after running for some time.
When dealing with this abnormal situation, the main engine is generally disassembled, soaked in cleaning agent, and then the oil separator tank, cooler and main oil circuit components are cleaned and soaked. Not only is the process complicated and time-consuming, but also all the seals of the machine need to be replaced after soaking. Therefore, it is very expensive to carry out a cleaning fee.
Another reason is high temperature. The screw air compressor generates a lot of heat during its operation. The air compressor room has good ventilation conditions to cool down the air compressor. If the ambient temperature is too high, relying on the fan of the air compressor to cool down alone cannot meet the requirements of the air compressor. machine requirements. Poor ventilation leads to high ambient temperature, and the use of air compressor oil at high temperature shortens the service life of the air compressor oil, reduces the lubricating performance of the air compressor oil, and impurity produced during the operation of the air compressor oil adheres to the circulation system The inner surface of the engine will generate carbon deposits after long-term operation. Although the air compressor has a high-temperature protection device, many customers have ignored it. In order not to affect production, the head lock occurred after the subsequent startup.
The high temperature of the air compressor affects the service life of the air compressor oil, and the lubricating degree of the air compressor oil decreases and affects the service life of the bearing. High temperature causes the air compressor oil to produce asphalt-like compounds. The more the compounds are, the more the circulation of the air compressor oil will be seriously affected. As a result, there is only one, the air compressor is coked, and the machine head is locked. Therefore, after the high temperature phenomenon occurs in the air compressor, it is necessary to analyze the reasons, such as ventilation conditions, whether the radiator is blocked, whether the air compressor oil is low, whether the temperature sensor is malfunctioning, etc.
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