What is the primary reason for using oil in an oil-flooded screw compressor?

The primary reason for using oil in an oil-flooded screw compressor is to provide lubrication and sealing. In these compressors, oil plays a crucial role in minimizing friction between moving parts, thus reducing wear and prolonging the life of the machinery. Additionally, the oil helps to create a seal between the rotor cavities, improving efficiency by preventing the escape of compressed air, which ultimately enhances the overall performance of the compressor.

Without adequate lubrication, components such as the rotors and bearings would experience increased wear due to friction, leading to potential mechanical failures and decreased operational efficiency. The sealing effect of the oil also ensures that the compressor operates effectively under varying pressure conditions. Therefore, the use of oil is fundamental for the reliable and efficient operation of oil-flooded screw compressors.