It consists of a packing assembly and a piston assembly, and its composition includes the following basic components. A stuffing box is formed at the bottom of the lower cylinder, and a rear guide sleeve, a first stuffing box with an oil scraper ring, a choke ring, a second stuffing box with a sealing ring, a leading sleeve and a stuffing gland at the mouth of the stuffing box are installed in the stuffing box from bottom to top. The choke ring and the second packing box form a choke sealing mechanism; The guiding and supporting mechanism consists of a rear guiding sleeve, a choke ring and a front guiding sleeve; The oil cut-off and oil discharge mechanism consists of an oil cut-off ring box, an oil cut-off ring in the box and a lower gland. The piston assembly consists of a piston body, a piston ring, a piston rod and a nut. Compared with the existing oil-free air compressor, the difference is that there is no guide ring on the piston body to guide and support. The piston body is not split, and the piston ring adopts inflation technology to make the piston ring work closely against the cylinder wall, which can also be used when the cylinder ellipse exceeds the technical requirements. www.jxzybb.com
Packing box-packing assembly drawing