| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily drive pumps in a pump device which has the plural rotational pumps by suppressing flexure of a driving shaft even when high pressure at discharge ports is applied to the driving shaft. SOLUTION: In this pump device 100, a rotational pump 13 is arranged on a position obtained by rotating a rotational pump 10 by 180 degrees around a driving shaft 54. That is, a discharge port 63 of the rotational pump 13 is arranged on the opposite side of a discharge port 61 of the rotational pump 10 across the driving shaft 54. With such a setup, force applied by high pressure fluid at the discharge port 61 to the driving shaft 54 is cancelled by the force to applied by high pressure fluid at the discharge port 63 to the driving shaft 54. Flexure of the driving shaft 54 is thus reduced. It is thus possible to provide the pump device in which the pumps are satisfactorily driven. |
