Screw air compressors is how it classified? Screw compressor is how does it work? Screw air compressors, from lubrication points, into the injection screw air compressors and oil-free screw air compressors two species, including oil-free screw air compressor can be divided into two types, namely water lubrication-free oil-free screw air compressors, dry screw air compressors. Injected screw air compressor oil-injected screw air compressor, also known as the oil-lubricated screw air compressor scroll compressor prospects, refers to the rotor interior in the intake air, but also inhaled lubricants (lubrication of the rotor and sealing function) air compressor development, the lubricating oil and compressed air are mixed together. Single-stage fuel injection screw compressor pressure ratio up to 15: 1. Screw compressor experienced the following periods: 1937, Alf Lysholm in SRM company successfully developed two types of screw compressors experimental prototype, and achieved satisfactory results. In 1946, in Scotland, England James Howden company, the first to get a license from the production of screw compressors Swedish SRM company. Subsequently, Europe, the US and Japan companies are starting to get this license from Sweden SRM company, engaged in the production and sale of screw compressors. First developed the screw compressor is oil-free screw compressors. 1957 injected screw air compressor into the market applications. 1961 and the successful development of the refrigeration compressors and oil-injected screw compressor screw technology. Then with the rapid development of China's economy, the state machinery industry, more and more attention to the development of a piston compressor, such as mining machinery, petrochemical machinery. Along with the development of these machines, the development of the industry is also in full swing compressor, air compressor maintenance air compressor development, air compressor accessories has also been a rapid development. Air compressor industry has emerged from the traditional industries, with strong support of science and technology and innovation to make reform commission basis points. Air compressor has become the representative of entrepreneurship. Since the plant since the Qin Wei compressor, we focused on piston compressor, screw compressor, the permanent inverter compressor, air compressor accessories, leading the industry's development, has a number of patents rights. German technology made in China, North Manchester compressor play a role in the market pillar mid-stream, the North West air compressor will become a pillar industry of China's air compressor industry, and promote sustainable economic development, promote China's economic rapid development. Compressor development, Qin Wei Pneumatic, air compressor developed by Compressor Co., Ltd. Xianyang Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) is Xianyang, compression, separation equipment leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qin Wei Pneumatic leadership with the staff warmly welcome all inquiries negotiations to create Qin Wei Pneumatic better future.