MECHANISM OF ROTARY PISTON MACHINE WITHOUT PISTON ROD Russian patent published in 2010 - IPC F01B13/00 F01B9/02 

FIELD: engines and pumps.

SUBSTANCE: invention refers to engineering industry and can be used in pumps, compressors and internal combustion engines. On the supports which are fixed on rigid frame, the rotor rotates on bearings; on it there installed are two opposite cylinder-piston pairs. Axes of piston rods cross at an angle of 90. Crankshaft the neck of which is made in the form of gear wheel is located parallel to rotor axis. Rotation axis of crankshaft passes through the centre of pitch line of that gear wheel. The latter is constantly engaged with the wheel rigidly fixed inside the rotor, the centre of its pitch line is in rotor rotation axis. Ratio of diametres of pitch lines of the wheel and gear wheel is 2:1. Eccentricity of the axis passing through the centre of pitch line of gear wheel is 1/4 of diametre of pitch line of the wheel. Eccentricity of crankshaft necks is 1/2 of diametre of pitch line of gear wheel. Crankshaft necks have hinged connection to centres of piston stocks. Crankshaft itself rotates in the bearings fixed in the frame supports.

EFFECT: providing high stiffness of mechanism, eliminating lateral friction, improving reliability.

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