(19)
(11) EP 2 540 983 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.01.2018 Bulletin 2018/01

(43) Date of publication A2:
02.01.2013 Bulletin 2013/01

(21) Application number: 12169688.4

(22) Date of filing: 28.05.2012
(51) International Patent Classification (IPC): 
F01D 25/24(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 29.06.2011 US 201113172279

(71) Applicant: United Technologies Corporation
Farmington, CT 06032 (US)

(72) Inventors:
  • Alvanos, Ioannis
    West Springfield, MA 01089 (US)
  • Suciu, Gabriel L.
    Glastonbury, CT 06033 (US)

(74) Representative: Taylor, Adam David et al
Dehns St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) Radial spline arrangement for LPT vane clusters


(57) A full hoop stator vane cluster (34) includes an inner hoop (42) and an outer hoop (44) both being substantially cylindrical and coaxial. A plurality of airfoils (36) extend radially between the hoops, and a plurality of vane splines (40) extend radially outward from the outer hoop for attaching the vane cluster to a case (23E) of a gas turbine engine (10). The case has a plurality of radially inwardly extending case splines (52) and the vane splines (40) may be fastened to the case splines (52) to substantially prevent relative axial and circumferential movement whilst permitting limited radial movement.







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