| 摘要 |
PURPOSE:To smoothen the discharge of the pump under an extremely low temperature by a method wherein a retaining part, retaining the vane, is formed below the slit groove of a rotor and a wide cavity is formed therebelow. CONSTITUTION:The triangular cavity 10c, narrowing gradually the width thereof, is formed below the both ends of the lower surface of the slit groove 10a of the rotor 10 and both ends of the lower surface of the vane 11 are retained at the both ends 10b of the lower surface of the slit groove 10a. Accordingly, high pressure oil, changed into a greasy condition due to the low temperature of about -40 deg.C, may be flowed into the triangular cavity 10c, therefore, the wide cavity to reserve the high pressure oil sufficient to expand the vane may be formed and the discharge of the pump may be smoothened. |
