| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a horizontal shaft pump (a double-suction horizontal shaft pump or self-balance multistage horizontal shaft pump) which has vane wheels disposed symmetrically, makes a radial load borne by a hydrostatic bearing, and effectively suppresses a dynamic thrust load acting on a spindle shaft in a low-flow-rate area including the vicinity of a point of cut-off. <P>SOLUTION: The double-suction horizontal shaft pump 1 includes the hydrostatic bearings 8 and 9 for bearing the radial load of the spindle 2. Sheet members 41A and 41B and balancing discs 43A and 43B are disposed adjacently to both ends of the hydrostatic bearing 9. The dynamic thrust load is canceled by an urging force equivalent to a difference between an urging force directed toward an anti-driving side 2b by the balancing disc 43A and an urging force directed toward a driving side by the balancing disc 43B is canceled out. The sheet member 41B and the balancing disc 43B are disposed adjacently to a driving-side end of the hydrostatic bearing 9 on the anti-driving side. The sheet member 41A and the balancing disc 43A are disposed adjacently to an anti-driving-side end of the hydrostatic bearing 8 on the driving side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
