Bearing Arrangement for Cryogenic Pump

摘要

A bearing arrangement for a wobble plate piston pump includes first, second, third, and fourth bearing assemblies. The first and second bearing assemblies support the drive shaft portion for rotation within the housing about the central longitudinal axis, while the third and fourth bearing assemblies support the load plate for rotation relative to the offset shaft portion of the shaft. The second bearing assembly is distally disposed from the first, the third disposed distally to second, and the fourth disposed distally to third. The fourth bearing assembly is the most distally disposed bearing assembly along the shaft.

主权项

1. A bearing arrangement for a wobble plate piston pump having a proximal end for coupling to a drive input, and a distal end, the pump including a shaft disposed to rotate within a housing about a central longitudinal axis, the shaft including a proximally-disposed drive shaft portion and a distally-disposed offset shaft portion, the drive shaft portion having a shaft axis disposed along the central longitudinal axis, the offset shaft portion including a wobble plate surface and a cap having a wobble plate axis disposed at an angle to the central longitudinal axis, the pump further including a load plate disposed for rotation relative to the shaft about the wobble plate axis, the bearing arrangement comprising:
a first bearing assembly supporting the drive shaft portion for rotation within the housing about the central longitudinal axis, a second bearing assembly supporting the drive shaft portion for rotation within the housing about the central longitudinal axis, the second bearing assembly being disposed distally to the first bearing assembly, a third bearing assembly supporting the load plate for rotation relative to the shaft, the third bearing assembly being disposed distally to second bearing assembly, and a fourth bearing assembly supporting the load plate for rotation relative to the shaft, the fourth bearing assembly being disposed distally to third bearing assembly, the fourth bearing assembly being the most distally disposed bearing assembly along the shaft.