To convert rotary motion into compressed air, various pump types can be considered, including hydraulic gear pumps, swash plate pumps, and centrifugal compressors like those in turbochargers. Piston-style compressors are also viable, especially for medium speeds, while diaphragm pumps are suitable for low-speed applications. Rotary vane pumps are recommended for lower pressures and mid-speed scenarios, often used in air injection systems for vehicles. The choice of compressor depends significantly on the required air pressure, flow rate, and the speed of the rotary motion. Understanding these factors is crucial for selecting the appropriate compressor type for the application.