Screw air compressors have a lot of advantages over other types of refrigeration compressors. The machine has good performance, strong credibility, stable exhaust air volume and working pressure during work, and is suitable for work under various standards. There are many resolutions and solutions for common problems of extruder screw air compressor in air flotation equipment, with small maintenance labor, low operation cost, low labor efficiency, and easy grasp. Common failures and solutions of screw air compressors in air flotation devices
1. Common faults of relays
During the whole operation of the marine screw air compressor, the open and closed, normally closed relays are embrittled due to the application, the valve core is invalid or the magnet coil is invalid, the relay does not open and close, and the throw valve cannot be opened, and the system software has no pneumatic valve.
The reason for the common failure of the relay is the fouling of the valve core or the common failure of the magnet coil. If there is fouling, it should be cleaned and tidy. If the solenoid is burned out, the relay should be dismantled and replaced immediately to ensure the creation of the original working pressure, and open the throw valve to ensure the air path.
Two, common failures of small pressure valves
The dissolved gas that will occur during operation is not very good. Sometimes common faults are caused by smaller pressure valves. When the working pressure P≥0.4MPa operated by the smaller pressure valve, the pressure valve opens. When the tightness of the valve core of the small pressure valve is not tightly closed or the spring is invalid, the working pressure of the gas circuit cannot reach the rated current, and the pressure and the dissolved gas are not good, which will harm the air flotation machine.
To deal with gate valves with low working pressure, when the valve core or high-pressure gate valve is not tightly closed, the valve core or high-pressure gate valve must be repaired or replaced. When the bomb yellow is invalid, adjust or dismantle the bomb yellow to ensure the stable working pressure of the gas circuit to improve the air flotation machine.
Three, common faults of oil and gas separator filter element
When the pressure drop on both sides of the oil-air separator filter element (>0.1MPa) or (>0.02MPa), the filter element cannot have the function of filtering and separating, so that the lubricating oil in the filter element cannot be separated very well. The gas compound enters the after-event system software according to the smaller pressure valve, and the lubricating oil is discharged too fast. A lot of lubricating oil enters the gas supply, and the remaining oil melted in the gas water increases, resulting in an increase in the oil content of the gas water float. At this time, dismantling and replacing the oil and gas separator filter element can solve this problem.
Fourth, the oil pump hole is blocked
Clogged nozzles are one of the reasons for the excess oil remaining in the aqueous solution. Because of the long-term continuous operation of air-cooled industrial air compressors, residues in the gas accumulate for a long time, residues or chemical fiber chemicals in the gasoline and diesel spout pipeline increase, and the orifice (Φ6) of the gasoline and diesel spout circuit is easily blocked. Block the spout circuit. The amount of oil in the steam tank slowly rises, and the oil is passively producing a smaller pressure valve, and there is more oil in the steam. At this time, clean the orifice and the fuel injection pipe.
Fifth, the flow back to the branch pipe is blocked
One of the key reasons is that the lubricating oil of the air compressor runs too fast and the orifice of the oil return pipe is blocked. After the fuel gas compounds are separated by the cyclone dust collector in the air compressor gas storage tank, most of the lubricating oil has settled to the bottom of the air compressor gas storage tank due to the separation of the cyclone dust collector and the force element, and the oil and gas separation Part of the oil after the filter element has been filtered has flowed to the bottom of the filter element to accumulate. If the oil return pipe is unobstructed, all the oil will flow to the automobile oil tank at the bottom of the refrigeration compressor for re-lubrication. However, if the orifice in the oil return pipe is blocked, the lubricating oil settled at the bottom end of the filter element cannot return to the fuel tank of the air compressor car. As the oil at the bottom of the filter element continues to accumulate, the white edge filling liquid rises and is developed by the continuously discharged gas. Cleaning or replacing the orifice is a necessary way to deal with this problem.
6. The change in crude oil quality has resulted in an increase in gas and China Petroleum
The commonly used lubricating oil for the screw air compressor of the software extruder of this system is light load rotating 32× air compressor oil. It is stipulated that the lubricating oil should have anti-rust treatment, anti-oxidation, anti-foam plastic and anti-corrosion ingredients. If the quality of the lubricating oil does not meet the stated requirements, the lubricating oil is easily oxidized by air, foamed plastic, oil-air oxidized or excessive foamed plastic during the whole process. Come out, the lubricating fluid is running too fast. At this time, the lubricant that meets the requirements should be replaced.
The long-term accumulation of substances and residues in the air increases the residues or chemical fiber chemical substances in the gasoline and diesel spout pipeline, making the orifice (Φ6) of the gasoline and diesel spout circuit very easy to be blocked. Block the spout circuit. The amount of oil in the steam tank slowly rises, and the oil is passively producing a smaller pressure valve, and there is more oil in the steam. At this time, clean the orifice and the fuel injection pipe.