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    • 6. 发明申请
    • PUMP
    • US20100284796A1
    • 2010-11-11
    • US12811235
    • 2009-01-16
    • Kimihiko MitsudaYasuharu Yamamoto
    • Kimihiko MitsudaYasuharu Yamamoto
    • F01D11/08F04D29/16F04D13/06F04D29/059
    • F04D29/047F04D7/02F04D29/049F04D29/167
    • In a pump, a main shaft (16) is rotatably supported by ball bearings (14, 15) in a casing (13) having a suction opening (11) and a discharge opening (12), an impeller (1) is connected to an end of the main shaft (16), and a canned motor (18) rotatably drives the impeller (17) through the main shaft (16). A front shroud (44) is provided at the front side in the axial center direction of the impeller (17), and a rear shroud (45) is provided at the rear side in the axial center direction. A predetermined gap (47) facing the axial direction is formed between the casing (13) and the front shroud (44), and sealing units (48, 49) facing the radial direction are provided between the casing (13) and the front shroud (44). This allows for extended life of the pump.
    • 在泵中,主轴(16)由具有吸入口(11)和排出口(12)的壳体(13)中的滚珠轴承(14,15)可旋转地支撑,叶轮(1)连接到 主轴(16)的端部,以及通过主轴(16)可旋转地驱动叶轮(17)的密封电动机(18)。 前叶片(44)设置在叶轮(17)的轴心方向的前侧,后护罩(45)设置在轴心方向的后方。 在壳体(13)和前护罩(44)之间形成面向轴向的预定间隙(47),并且在壳体(13)和前护罩之间设置面向径向的密封单元(48,49) (44)。 这样可以延长泵的使用寿命。