LUBRICANT VANE PUMP

摘要

Lubricant vane pump (10) with a pump rotor (14) including at least three slidable vanes (18), a circumferential stator ring (12) and two stator side walls (17) being rectangular to the stator ring (12), whereby the rotor vanes (18), the stator ring (12) and the stator side walls (17) define rotating pumping chambers (19) with a pumping chamber angle (alpha), whereby the stator ring (12) and the stator sidewalls (17) enclose a pump cavity which is separated into an inlet sector (A) with an inlet opening (30), an outlet sector (C) with an outlet opening (28) and an intermediate sector (B) between the inlet sector (A) and the outlet sector (C), whereby the pumping chamber (19-1) running through the intermediate sector (B) is substantially closed and the intermediate sector angle (beta) exceeds the pumping chamber angle by an intermediate closing angle (gamma) of at least 5°, and whereby the stator ring (12) is provided with an intermediate isovolumetric contour (38), so that the pumping chamber volume is constant over at least the last 5,0° of the intermediate sector (B).