FREE-PISTON COMPRESSOR WITH ELECTROMAGNETIC DRIVE Russian patent published in 2007 - IPC F04B31/00 

FIELD: manufacture of compressors for transport facilities; construction engineering and farming.

SUBSTANCE: proposed compressor has receiver of varying volume and hollow cylindrical housing. Piston is mounted inside hollow cylindrical housing. Compressor is provided with inlet valve with spring-loaded shut-off member mounted in its body. Shut-off member is provided with through axial passage. Compressed gas outlet valve provided with spring-loaded shut-off member is mounted in axial passage of shut-off member of inlet valve. Compressed gas cooling radiator is made in form of hollow bush mounted coaxially in passage of inlet valve shut-off member. It is provided with pipe union for discharge of compressed gas and tube for delivery of compressed gas to receiver which is communicated with compressed gas discharge pipe union. Cavity of cylindrical housing may be communicated with receiver through compressed gas discharge valve, compressed gas discharge pipe union and tube for delivery of compressed gas to receiver; it may be communicated with atmosphere through outlet valve and filter. Receiver includes load-bearing frame with guide axle secured inside it; receiver is also provided with casing mounted on guide axle; this casing is formed by corrugated envelope movable along guide axle and provided with outer and inner stiffening rings; casing is also formed by movable end envelope and fixed end envelope provided with gas inlet and outlet pipe union and sealing member. Unit for change of casing volume is made in form of two ropes, shaft with belt spring secured on it and worm reduction gear for tension of belt spring which is connected with shaft. First ends of ropes are connected with belt spring and second ends are connected with movable end envelope. Sealing member is located at point of engagement of movable end envelope with guide axle; electromagnetic drive includes at least one electromagnetic coil provided with control turn and located on the outside of cylindrical housing.

EFFECT: enhanced reliability and efficiency; enhanced economical efficiency; high compactness of compressor.

6 cl, 2 dwg