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Method and device for reducing axial thrust in rotary machines and a centrifugal pump using same

  • US 6,129,507 A
  • Filed: 04/30/1999
  • Issued: 10/10/2000
  • Est. Priority Date: 04/30/1999
  • Status: Active Grant
First Claim
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1. A method for reducing axial thrust in a rotary machine, said machine comprising a housing with a center and a periphery, said housing containing a fluid inlet, a fluid outlet, a shaft rotatably mounted in said center, a rotor mounted on said shaft, said rotor having at least one radial surface, said housing having at least one interior wall surface proximate said radial surface of said rotor and defining a cavity therebetween, said cavity having a central area proximal the center of said housing and a peripheral area proximal the periphery of said housing, said method comprising the steps of:

  • subdividing a fluid flow in said cavity into a first fluid flow and a second fluid flow; and

    channeling said first fluid flow between said peripheral area and said central area while shielding it from said second fluid flow,whereby the fluid pressure of said second fluid flow in said cavity being altered in order to reduce the axial thrust on said rotor.

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