Screw compressors are not all oil-free. According to different designs and applications, they can be divided into oil-free screw compressors and oil-free screw compressors. At the same time, the water-lubricated single-screw air compressor is a kind of screw compressor, which uses a special water lubrication technology and contains the key component of the star wheel.
Classification of 1. screw compressors
- oil-free screw compressor: The medium in the compression chamber does not contact with the lubricating oil, so it is called "oil-free screw" or "dry screw". Its characteristic lies in the compression chamber is dry, no oil exists.
- oil screw compressor: Also known as "oil injection screw" or "oil injection screw", lubricating oil or other liquids will be injected into the working cavity to cool the compressed gas, improve the seal, and lubricate the female and male rotors and bearings.
2. water lubricated single screw air compressor
- features: The water-lubricated single-screw air compressor adopts oil-free water lubrication technology, and its lubrication and cooling medium is water instead of traditional lubricating oil. The compressed air produced by this air compressor is pure and oil-free, which is very suitable for medical, food, electronics, pharmaceutical and other industries with high air quality requirements.
- Working principle: The working principle of the water-lubricated single-screw air compressor is to use water-based as the sealing and lubricating medium to achieve oil-free compression. During operation, water is injected into the compression chamber to play the role of lubrication, cooling, sealing and noise reduction.
3. Star Wheel
- definition and function: The star wheel is one of the key components in the water-lubricated single-screw air compressor. It forms a meshing pair with the cylindrical screw to complete the compression process together. The design of the star wheel makes the compression process more efficient and stable, and helps to achieve oil-free compression.
- Structural features: The star wheel usually has a symmetrical structure to ensure the force balance of the compressor. At the same time, the star wheel is made of specially customized polymer material to improve its wear resistance and service life.
In summary, screw compressors are not all oil-free, and water-lubricated single-screw air compressor is a kind of screw compressor. It uses special water lubrication technology and star wheel structure to achieve efficient, Stable, oil-free compressed air production.
