IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0825381
(2010-06-29)
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등록번호 |
US-8727729
(2014-05-20)
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발명자
/ 주소 |
- Noronha, Marian B.
- Noronha, Timothy P.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
9 |
초록
▼
Provided is a two-piece shrouded impeller, and methods for manufacturing and assembling a two-piece shrouded impeller. The two-piece shrouded impeller, in accordance with one embodiment, may have a one-piece partially shrouded impeller having a central hub, a number of blades integrally attached to
Provided is a two-piece shrouded impeller, and methods for manufacturing and assembling a two-piece shrouded impeller. The two-piece shrouded impeller, in accordance with one embodiment, may have a one-piece partially shrouded impeller having a central hub, a number of blades integrally attached to the hub, and one or more integral partial shroud sections integrally attached to the blades. The two-piece shrouded impeller in this embodiment may also have a separate shroud section that attaches to the one-piece shrouded impeller, so that the separate shroud section and the partial shroud sections combine to form a completed shroud that covers the impeller blades. The separate shroud section may attach to the one-piece shrouded impeller with a snap joint, or with an interference fit, or using a squeeze deformable ring. Once attached, the shroud section may be bonded to the one-piece shrouded impeller by brazing, stick welding, ultrasonic welding, or electron beam welding.
대표청구항
▼
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 comprising a centrally located hub formed around a center bore, said hub having a hub bore edge with a hub bore edge radius and a hu
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 comprising a centrally located hub formed around a center bore, said hub having a hub bore edge with a hub bore edge radius and a hub rim with a hub rim radius,a plurality of blades integrally attached to said hub,an integral partial shroud integrally attached to said plurality of blades, said integral partial shroud comprising an outer rim with an outer rim radius, and an inner edge with an inner edge radius, said integral partial shroud inner edge radius being smaller than said integral partial shroud outer rim radius;forming an inner shroud section comprising an inner shroud section inner surface configured to abut said plurality of blades,an inner shroud section connecting outer edge configured to abut said integral partial shroud inner edge, andforming an outer shroud section comprising an outer shroud section inner surface configured to abut said plurality of blades,an outer shroud section connecting inner edge configured to abut said integral partial shroud outer rim,wherein said inner shroud section and said outer shroud section are configured to join said integral partial shroud as a substantially contiguous shroud. 2. The method of claim 1, wherein said forming comprises milling. 3. The method of claim 1, wherein said forming comprises selective laser sintering (SLS). 4. The method of claim 1, wherein said forming comprises stereolithography. 5. The method of claim 1, wherein: said inner shroud section and/or said outer shroud section further comprises a plurality of grooves formed in said inner shroud section and/or said outer shroud section inner surface, said plurality of grooves configured to receive a plurality of blade axial extensions raising surfaces of each of said plurality of blades. 6. The method of claim 5, further comprising the steps of: attaching said inner shroud section and said outer shroud section to said partially shrouded impeller; andbonding said inner shroud section and said outer shroud section to said partially shrouded impeller. 7. The method of claim 6, wherein attaching comprises a snap joint. 8. The method of claim 6, wherein attaching comprises an interference fit. 9. The method of claim 6, wherein attaching comprises a squeeze deformable ring. 10. The method of claim 6, wherein bonding comprises brazing. 11. The method of claim 6, wherein bonding comprises stick welding. 12. The method of claim 6, wherein bonding comprises ultra sonic welding. 13. The method of claim 6, wherein bonding comprises electron beam welding. 14. A shrouded impeller, comprising: a one-piece partially shrouded impeller, said one-piece partially shrouded impeller comprising a centrally located hub formed around a center bore, said hub having a hub bore edge with at hub bore edge radius and a hub rim with a hub rim radius,a plurality of blades integrally attached to said hub,an integral partial shroud integrally attached to said plurality of blades, said integral partial shroud comprising an outer rim with an outer rim radius, said integral partial shroud further comprising an inner edge with an inner edge radius, said integral partial shroud inner edge radius being smaller than said integral partial shroud outer rim radius;an inner shroud section comprising a shroud section inner surface configured to abut said plurality of blades,an inner shroud section connecting outer edge configured to abut said integral partial shroud inner edge; andan outer shroud section comprising an outer shroud section inner surface configured to abut said plurality of blades,an outer shroud section connecting inner edge configured to abut said integral partial shroud outer rim,wherein said inner shroud section and said outer shroud section are configured to join said integral partial shroud as a substantially contiguous shroud. 15. The shrouded impeller of claim 14, wherein said inner shroud section and said outer shroud section comprises 10% to 90% of the area of said substantially contiguous shroud. 16. The shrouded impeller of claim 14, further comprising: a plurality of grooves formed in said inner shroud section and said outer shroud section inner surface, said plurality of grooves configured to receive a plurality of blade axial extensions. 17. The shrouded impeller of claim 14, wherein: said inner shroud section is attached to said integral partial shroud by a snap joint; andsaid outer shroud section is attached to said integral partial shroud by a snap joint. 18. The shrouded impeller of claim 14, wherein: said inner shroud section is attached to said integral partial shroud by interference fit; andsaid outer shroud section is attached to said integral partial shroud by interference fit. 19. The shrouded impeller of claim 14, wherein: said inner shroud section is attached to said integral partial shroud by a squeeze deformable ring; andsaid outer shroud section is attached to said integral partial shroud by a squeeze deformable ring. 20. The shrouded impeller of claim 14, wherein: said inner shroud section and said outer shroud section inner surface is bonded to said plurality of blades by brazing;said inner shroud section and said outer shroud section is bonded to said integral partial shroud by brazing; andsaid inner shroud section and said outer shroud section is bonded to said integral partial shroud by brazing. 21. The shrouded impeller of claim 14 , wherein: said inner shroud section and said outer shroud section inner surface is bonded to said plurality of blades by stick welding;said inner shroud section and said outer shroud section is bonded to said integral partial shroud by stick welding; andsaid inner shroud section and said outer shroud section is bonded to said integral partial shroud by stick welding. 22. The shrouded impeller of claim 14, wherein: said inner shroud section and said outer shroud section inner surface is bonded to said plurality of blades by ultra sonic welding;said inner shroud section and said outer shroud section is bonded to said integral partial shroud by ultra sonic welding; andsaid inner shroud section and said outer shroud section is bonded to said integral partial shroud by ultra sonic welding. 23. The shrouded impeller of claim 14, wherein: said inner shroud section and said outer shroud section inner surface is bonded to said plurality of blades by electron beam welding;said inner shroud section and said outer shroud section is bonded to said integral partial shroud by electron beam welding; andsaid inner shroud section and said outer shroud section is bonded to said integral partial shroud by electron beam welding.
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