H2: The Working Principle of an Oil-Free Water Lubricated Screw Air Compressor.
An oil-free water lubricated screw air compressor utilizes water as a lubricant to reduce friction between the rotors and casing. It operates by drawing air into the compressor through an inlet valve and trapping it between two counter-rotating rotors, which compress the air as they rotate. The compressed air is then released through a discharge valve into the air storage tank.
H3: Step-By-Step Operation of an Oil-Free Water Lubricated Screw Air Compressor.
Step 1: Air Intake.
The air compressor draws in air through an inlet valve into the compression chamber.
Step 2: Compression.
The counter-rotating screws rotate in opposite directions and force the air to move towards the discharge valve located at the end of the screw assembly. As the air passes between the rotors, it is compressed, and its pressure and temperature increase.
Step 3: Cooling.
The heat generated during compression is absorbed by water sprayed into the compression chamber. The water creates a thin film on the screw rotors, casing, and other internal surfaces, which reduces friction and helps to remove heat from the compressed air.
Step 4: Separation.
The compressed air and water mixture leaving the compression chamber enters the separator, where centrifugal forces separate the water from the compressed air. The water is then drained from the separator and passed through a filtration system to remove impurities.
Step 5: Filtration.
The water filtration system eliminates any impurities present in the water, such as oil and other contaminants, ensuring that the water used for lubrication is clean and free from harmful substances.
Step 6: Reuse.
After filtration, the water is injected back into the compressor to lubricate the rotors, casing, and other internal surfaces. The water lubricant helps ensure that the compressor operates smoothly and reduces wear and tear.
Step 7: Discharge.
The compressed air leaves the separator and passes through the discharge valve into the air storage tank. The air pressure in the storage tank is regulated by a pressure switch, which ensures that the compressed air is available for use when needed.
Overall, an oil-free water lubricated screw air compressor offers several advantages, such as reduced maintenance costs, increased efficiency, and environmental friendliness, making it an ideal choice for many industrial applications.
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