GUIDED-VANE PUMP Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: pump has housing with supply and discharge passages, stator with cylindrical working surface, bearing bushes arranged on either side of stator, rotor provided with shaft holding cylindrical bush having grooves for receiving the blades and two hold-down members provided with cylindrical surfaces engageable with bearing bushes forming sliding bearings and with end cheeks arranged in bores of bearing bushes and generating surfaces directed to stator and working chamber. Bores are connected by means of equalizing passage forming the chamber brought in communication with working chamber and with low-pressure chambers. EFFECT: enhanced reliability. 3 dwg