公开(公告)号：US3652186A

公开(公告)日：1972-03-28

申请号：US3652186D

申请日：1970-05-25

申请人： CARTER CO J C

发明人： CARTER JAMES C

IPC分类号： F04D9/00 ,  F04D13/06 ,  F04D13/08 ,  F04D29/60 ,  F04B17/00 ,  F04B35/00 ,  F04B35/04 ,  F04B39/02 ,  G01F11/30

CPC分类号： F04D29/608 ,  F04D9/00 ,  F04D13/0613

摘要： Electric motor driven pump units, especially suited for pumping liquefied gases, including cryogenic fluids, which are lubricated, cooled and balanced with small amounts of fluid pumped by the unit (pumpage), such as 1 to 3 percent of the designed flow capacity of the pump. These small amounts of pumpage are divided into a major flow path through the most heated portions of the units discharging on the pressure side of the pump and a minor flow path through a thrust bearing for the unit and then through the lesser heated portions to discharge on the intake side of the pump. The major flow path, receiving about 75 percent of the lubricating pumpage, is downwardly through the motor shaft radial bearings and rotor compartment to an impeller and a pumping or collection chamber. The minor flow path, receiving about 25 percent of the lubricating pumpage, is through variable thrust bearing orifices tending to raise the motor shaft and carry the axial load of the unit on a thin film discharging through the hollow interior of the shaft to the pump inlet. The pumpage in the major flow path is maintained under pressure and will not boil even when appreciably heated. The minor flow path picks up very little heat and is primarily for balancing the axial thrust load on the shaft.

摘要翻译： 电动机驱动的泵单元，特别适用于泵送液化气体（包括低温流体），这些液体气体通过单元（泵送）泵送的少量流体被润滑，冷却和平衡，例如设计流量的1％至3％ 泵。 这些少量的泵送被分成通过在泵的压力侧排出的单元的最加热部分的主要流动路径和通过用于该单元的推力轴承的小流动路径，然后通过较小的加热部分排出 泵的进气侧。 接收大约75％的润滑泵的主流路径向下通过马达轴径向轴承和转子室到叶轮和泵送或收集室。 接收约25％的润滑泵的小流路通过可变推力轴承孔，倾向于升高电机轴，并将单元的轴向载荷承载在通过轴的中空内部排放到泵入口的薄膜上 。 主流路中的泵送保持在压力下，即使在明显加热时也不会沸腾。 小流路拾取非常少的热量，主要用于平衡轴上的轴向推力负载。