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Method for Producing a Shrouded Impeller from Two or More Components

  • US 20110318183A1
  • Filed: 06/29/2010
  • Published: 12/29/2011
  • Est. Priority Date: 06/29/2010
  • Status: Active Grant
First Claim
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1. A method for manufacturing a shrouded impeller, comprising the steps of:

  • forming a one-piece partially shrouded impeller, said one-piece partially shrouded impeller comprisinga centrally located hub formed around a center bore,a plurality of blades integrally attached to said hub,an inner integral shroud integrally attached to said plurality of blades, said inner integral shroud comprising an outer rim with an outer rim radius,an outer integral shroud integrally attached to said plurality of blades, said outer integral shroud comprising an inner edge with an inner edge radius, said outer integral shroud inner edge radius being larger than said inner integral shroud outer rim radius, thereby defining an annular gap between said inner integral shroud and said outer integral shroud; and

    forming an annular shroud section, said annular shroud section comprisingan annular shroud section inner surface,an annular shroud section inner edge with an annular shroud section inner edge radius being approximately equal to said inner integral shroud outer rim radius, andan annular shroud section outer rim with an annular shroud section outer rim radius being approximately equal to said outer integral shroud inner edge radius.

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