公开(公告)号：US5217350A

公开(公告)日：1993-06-08

申请号：US811435

申请日：1991-12-23

申请人： Kenji Kimura ,  Kiyoshi Miyazaki ,  Toshihide Matsunaga ,  Shoji Isobe ,  Shigeru Itoh ,  Naokazu Kawase ,  Tsutomu Kishi

发明人： Kenji Kimura ,  Kiyoshi Miyazaki ,  Toshihide Matsunaga ,  Shoji Isobe ,  Shigeru Itoh ,  Naokazu Kawase ,  Tsutomu Kishi

IPC分类号： F04D29/04 ,  F04D29/049 ,  F04D29/12

CPC分类号： F04D29/049 ,  F04D29/128 ,  F02B2275/18 ,  F05B2260/603

摘要： A cylindrical support portion is provided on a wafer pump case to surround a rotary shaft, and a cylindrically formed power transmitting rotary wheel surrounding the support portion is integrally coupled to an outer end of the rotary shaft which protrudes outwardly from the support portion. A bearing means is interposed between an inner surface of the power transmitting rotary wheel and an outer surface of the support portion. A plurality of sealing members disposed concentrically with the bearing means are interposed between the rotary shaft and an inner surface of the cylindrical support portion at a location axially outwardly spaced from the mechanical seal, and a grease is filled between the sealing members. The water pump structure not only improves the sealing property of the sealing members by providing the sealing members at a location in which the deflection of the rotary shaft is smallest, but also increases the retaining property for the grease between the plurality of sealing members. This enhances water resistance of the bearing means. Moreover, in spite of the provision of the plurality of sealing members and the bearing means, the water pump structure avoids an undesirable increase in size and remains relatively compact.

摘要翻译： 圆筒形支撑部分设置在晶片泵壳体上以围绕旋转轴，并且围绕支撑部分的圆柱形动力传递旋转轮一体地联接到从支撑部向外突出的旋转轴的外端。 在动力传递旋转轮的内表面和支撑部分的外表面之间插入有轴承装置。 与轴承装置同心地设置的多个密封构件设置在旋转轴与圆柱形支撑部分的内表面之间的轴向向外与机械密封件间隔开的位置处，并且在密封构件之间填充润滑脂。 水泵结构不仅通过在旋转轴的偏转最小的位置设置密封构件而提高密封构件的密封性，而且还增加了多个密封构件之间的润滑脂的保持性。 这增强了轴承装置的耐水性。 此外，尽管设置了多个密封构件和轴承装置，但是水泵结构避免了不期望的尺寸增加并且保持相对紧凑。