SINGLE-SCREW PUMP AND ITS ROTOR Russian patent published in 1999 - IPC

FIELD: mechanical engineering; single-screw pumps used for handling various media in construction, chemical, food-processing and other industries. SUBSTANCE: single-screw pump has rotor made in form of single-thread screw whose round cross section is shifted relative to axis of screw by amount of eccentricity, stator having double-start surface whose cross-section is formed by two semicircumferences connected by lines and shaft connecting the rotor with drive shaft. Ends of shaft are provided with at least two flexible strips formed by pairs of opposite slots. Strips are turned relative to each other. This shaft makes it possible to transmit both compressive and tensile forces when sense of rotation of pump is reversed. EFFECT: extended functional capabilities. 3 cl, 5 dwg