INTERNAL ENGAGEMENT ROTARY MACHINE (VERSIONS) Russian patent published in 2007 - IPC F01C1/10 F01C19/00 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to hydraulic motors and pumps with internal engagement of rotors, particularly, to their multiphase use. Proposed rotary machine has body with cylindrical space and working medium suction and delivery channels and at least one axial cavity limited by cylindrical surface and made in zone of delivery of working medium of inner cylindrical surface of body, rotor with internal teeth and working ports in tooth spaces coaxially arranged inside axial cavity of body, and inner rotor installed inside outer rotor with eccentricity, rigidly secured of shaft and provided with external teeth. Suction and delivery chambers formed between teeth and tooth spaces of both rotors communicate, respectively, with suction channel and delivery channel and with body space. At least one of cavities is made in zone of full engagement of tooth of inner rotor with tooth spaces of outer rotor and it communicates with space of body. Width of each cavity in cross section of body space exceeds width of working port in cavities of outer rotor. One of its end faces is remote from radial axis passing through tooth of inner rotor in full engagement with teeth of outer rotor by angular distance equal to or less than half of angular pitch of outer rotor teeth. Sense of rotation of inner rotor in zone of full engagement of both rotors is opposite to direction of working medium flow suction channel into delivery channel.

EFFECT: improved reliability and increased service life of machine.

26 cl, 22 dwg