ROTARY EXPANSION MACHINE Russian patent published in 2017 - IPC F01C1/44 

FIELD: machine engineering.

SUBSTANCE: machine comprises a housing 1 with a chamber 4 having an internal closed cylindrical surface 5, which are parallel to the axis of the chamber 4, and two end surfaces 6, 7. The chamber 4 has inlets and outlets 8-11 passing through the body 1, a shaft 12 passing through the chamber 4 coaxially with it, four pistons 13-16 located in the chamber 4 forming an equilateral hinged quadruple having each working outer surface 17, a device for transferring the movement between the pistons 13-16 and the shaft 12, containing the guide rails 19-22 rigidly connected to the shaft 12. The ends of the pistons 13-16 are in dense sliding contact with the surface 5 of the chamber 4, which is the main guide for them. The surface 5 of the chamber 4 has a profile that is an external equidistant remote from the reference curve described by the equation in polar coordinates.

EFFECT: ensuring uniform rotation of the output shaft and obtaining a constant torque, reliability, high torque on the machine shaft and achieving the possibility of self-starting at any angular position of the shaft, increasing the uniformity of the shaft travel.

5 cl, 12 dwg