TWO-CYLINDER VANE PUMP Russian patent published in 2002 - IPC

FIELD: mechanical engineering; liquid transfer devices. SUBSTANCE: two-cylinder rotor of proposed two-cylinder pump is provided with flexible seal to eliminate any clearance in joint between rotor and narrow passage in pump housing when rotor is in its top or bottom dead center. Drive shaft in gearbox of said pump is not in direct engagement with driven shaft being in indirect engagement through two intermediate gear trains. Round concentric gear wheel and elliptical eccentric gear wheel in each intermediate gear train are installed on shaft in common manner, thus forming gear train with two gear wheels. Two elliptical eccentric gear wheels are in engagement and two round concentric gear wheels are, respectively, in engagement with drive and driven gear wheels. EFFECT: reduced noise and vibration of gear wheels in operation of pump. 5 cl, 17 dwg