Patent ID: 6208512
Filing Date: 2001-03-27
Classification: F04D,F16C,F28D,G06F,H02K,H05K

Abstract:
A pump comprising:a housing having a bore, an inlet joined to said bore for receiving a liquid fluid, and an outlet joined to said bore for discharging said fluid;a shaft disposed coaxially in said bore and spaced therein to define a gap therearound, and said shaft has integral portions including a journal, an impeller, and a rotor spaced coaxially apart from each other and hermetically sealed in said housing; andmeans for rotating said rotor to drive said shaft and impeller to pump said fluid through said gap from said inlet to said outlet, and around said journal thereby developing a hydrodynamic journal bearing in said gap around said journal, and said journal bearing being disposed in parallel flow with said housing outlet for receiving a minor portion of said pressurized fluid from said impeller, with a majority portion of said pressurized fluid from said impeller being discharged from said housing outlet.