| 摘要 |
PURPOSE:To enable pulsation of discharge pressure of both pumps to be reduced by coupling two pumps with a rotary shaft of one motor and varying the phases of these first and second rotors of the pumps to couple them with the rotary shaft. CONSTITUTION:Two sets of intake portions of pumps interconnected by a rotary shaft 6 of one motor (not shown) communicate to each other through a communicating hole 24 provided in a middle plate 12. And an intake port 15 provided in a cover 14 is shaped same as a relief hole 25 provided in a pump base body 10 so that the intake timing of a second rotor 20 equals the intake timing of a first rotor 17. Also, two sets of discharge portions of pumps communicate to each other through a communicating hole 26 provided in a middle plate 12. The first and second rotors 17, 20 are coupled with a rotary shaft 6 through pins 16, 19 with the relative angular displacement of 180 deg. to each other. Thus, the pulsation of discharge pressure of both pumps can be offset and remarkably reduced. |
