| 摘要 |
PROBLEM TO BE SOLVED: To reduce a thrust load acting on a rotation shaft by one pump unit when the other pump unit is driven, in a pump integrated with a motor having two pump units disposed on a rotation shaft capable of normal or reverse rotation. SOLUTION: A first pump unit 16 has a rotor 13 fixed to the rotation shaft 14. A second pump unit 17 has an impeller 15 fixed to the rotation shaft 14. When the rotor 13 rotates in a normal direction and feeds fluid to act the thrust load on the rotation shaft 14, the fluid of the periphery of the impeller 15 is pressed by a first pressing face 39a of the impeller 15 rotating integrally with the rotor 13, in the same direction as a thrust load direction. Since reaction pressing the fluid by the first pressing face 39a acts on the impeller 15, the thrust load acting on the rotation shaft 14 is countervailed by the reaction, and load of a bearing of the rotation shaft 14 caused by the thrust load acting on the rotation shaft 14 is reduced, and thereby durability of the bering is improved. COPYRIGHT: (C)2005,JPO&NCIPI
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