| 摘要 |
FIELD: engines and pumps.SUBSTANCE: lubricating oil supplied to impeller blade 1 is supplied to pump chamber 2A through oil supply channel 11a of axial direction, oil supply channel 11b of diametrical direction and oil supply groove 11c of axial direction of oil supply passage 11. Gas pass 13 consists of gas groove 13a, one end of which is interconnected with the environment. Gas groove 13a is formed on external peripheral surface of part 3B of rotor 3 shaft. The other end of that gas groove is interconnected intermittently with oil supply groove 11c of axial direction at rotation of rotor 3. Width of gas groove 13a is larger than width of hole of oil supply channel 11b of diametrical direction based on circular direction of some part of shaft of rotor 3, and it is continued to positions before and after both ends of the hole of oil supply channel 11b of diametrical direction, and in addition, its width is smaller than that of oil supply groove 11a of axial direction.EFFECT: prevention of air suction to the pump chamber from the gas pass as much as possible, thus allowing to prevent the rise of the engine torque.3 cl, 6 dwg |
