GB727716A - Improvements in and relating to turbomachine bucket-wheels - Google Patents

Improvements in and relating to turbomachine bucket-wheels

Info

Publication number
GB727716A
GB727716A GB27426/53A GB2742653A GB727716A GB 727716 A GB727716 A GB 727716A GB 27426/53 A GB27426/53 A GB 27426/53A GB 2742653 A GB2742653 A GB 2742653A GB 727716 A GB727716 A GB 727716A
Authority
GB
United Kingdom
Prior art keywords
tangs
buckets
fusion
mould
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB27426/53A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB727716A publication Critical patent/GB727716A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Products (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

727,716. Casting composite articles and joints. GENERAL ELECTRIC CO. Oct. 6, 1953 [Oct. 8, 1952], No. 27426/53. Classes 83 (1), 83 (2) and 83 (4). Welding by fusion.-In a method of making a turbo-machine bucket-wheel by uniting preformed buckets with a central wheel web, the buckets are assembled about the periphery of a mould with their base portions connected together to provide a path for electric current, electrically-heated to a predetermined temperature and then molten web-forming material is poured into the mould. The individual buckets, Fig. 1, may be made by extrusion, forging, machining from solid stock &c., but are preferably precision cast, as by the lost-wax process, and comprise a blade portion 1, a radially projecting locating tang 3 and a base portion 2 comprising a fusion tang 6 and an intermediate base portion 5 having transversely extending arcuate recesses 5a, 5b. A number of buckets are then supported in a welding fixture, Figs. 2 and 6, clamped by rings 7, 9 and connected by tack welds 11, 12 to form a complete annular row, the tangs 6 forming a closed electricallyconductive path. Ceramic rods or tubes 21 are inserted in the substantially circular recesses formed by co-operating recesses 5a, 5b and the assembly inserted in a shell mould 14, 15, being supported therein by engagement of the tangs 3 with recesses adjacent clamping bolts 16 and yieldable packing rings 17, 18 of asbestos or fibre glass. The bucket assembly is heated by low voltage induction coils 24, 28 which induce eddy currents in the path formed by the tackwelded fusion tangs. Metal is then poured through the gate 30. After cooling, the shell mould and packing rings are stripped from the casting which is then machined or ground to size, the tangs 3 being thereby removed. Before or after machining, the ceramic tubes &c. are removed by driving them out or by chemical means, and any metal which may have entered the gaps 21a between the tubes and the bucket bases, is cleared out by reaming or grinding.
GB27426/53A 1952-10-08 1953-10-06 Improvements in and relating to turbomachine bucket-wheels Expired GB727716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US727716XA 1952-10-08 1952-10-08

Publications (1)

Publication Number Publication Date
GB727716A true GB727716A (en) 1955-04-06

Family

ID=22109648

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27426/53A Expired GB727716A (en) 1952-10-08 1953-10-06 Improvements in and relating to turbomachine bucket-wheels

Country Status (1)

Country Link
GB (1) GB727716A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130827B (en) * 1958-04-29 1962-06-07 Ford Werke Ag Method and device for the production of blade wheels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130827B (en) * 1958-04-29 1962-06-07 Ford Werke Ag Method and device for the production of blade wheels

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