Inducer with tip shroud and turbine blades

Details Inducer with tip shroud and turbine blades Inducer with tip shroud and turbine blades

2011-04-26

2011-04-26

Nguyen, Ninh H (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific drive or transmission means

Impeller driven by fluid motor

C416S175000, C416S176000, C416S19800R, C416S189000, C416S203000

Reexamination Certificate

active

07931441

ABSTRACT:
A two blade row inducer for a low pressure pump in a turbopump of a rocket engine. The inducer includes a first set of blades and a second set of blades or partial blades in which the partial set of blades is covered with a shroud and the shroud includes a row of turbine blades extending outward to form a turbine to drive the inducer. The first set of blades is spiral or screw thread blades that end just upstream from the leading edges of the second set of blades covered with the shroud. In another embodiment, the screw thread blades can extend toward the aft end of the inducer and in-between adjacent partial blades in which the shroud also covers the aft ends of the screw thread blades. A second fluid reacts with the turbine blades to rotate the inducer and pump the first fluid.

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