High efficiency centrifugal pump
A high speed fuel pump for a gas turnbine engine has a positively-driven shroud positioned between a main impeller and the wall of a pumping cavity to reduce impeller drag. The shroud is formed by a first disc having a boost impeller connected to its central hub portion and a second disc having a gear carried by its central hub portion. The main drive shaft assembly to which the main impeller is connected, carries a gear which meshes with gear mounted upon a shaft. The shaft also carries a gear which meshes with the gear. The gears are sized so that the shroud is driven at one-half the speed of the main impeller in order to maximize impeller drag reduction and enhance pumping capability when severe inlet conditions are present at the pump inlet.
- Assignee:
- Chandler Evans Inc.
- Patent Number(s):
- US 4408953
- OSTI ID:
- 5389384
- Resource Relation:
- Patent File Date: Filed date 6 Jan 1982; Other Information: PAT-APPL-337473
- Country of Publication:
- United States
- Language:
- English
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