(19)
(11) EP 2 803 867 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.06.2015 Bulletin 2015/25

(43) Date of publication A2:
19.11.2014 Bulletin 2014/47

(21) Application number: 14161532.8

(22) Date of filing: 25.03.2014
(51) International Patent Classification (IPC): 
F04D 29/66(2006.01)
F01D 5/30(2006.01)
 F01D 5/02(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: 14.05.2013 GB 201308596

(71) Applicant: Rolls-Royce plc
London SW1E 6AT (GB)

(72) Inventor:
  • Wilson, Andrew
    Bristol, South Gloucestershire BS20 8HW (GB)

(74) Representative: Yeomans, Victoria Jane Anora et al
Rolls-Royce plc Intellectual Property SinB-38, PO Box 31
Derby, Derbyshire DE24 8BJ
Derby, Derbyshire DE24 8BJ (GB)

   


(54) Balancing method


(57) A method is provided of balancing a set of retaining and locking plates (3, 5) used to retain a row of gas turbine engine aerofoil blades (1) in attachment to a rotor disc (7). The method includes: (i) providing a weighing plate (109) having a circular track (115); (ii) providing a non-rotating, static balancing apparatus capable of detecting unbalance in the weighing plate; (iii) positioning the weighing plate on the static balancing apparatus, and positioning the set of retaining and locking plates on the track in an arrangement corresponding to a possible arrangement for the set of plates in use in the engine; and (iv) repositioning the retaining and locking plates on the track to arrive at a balanced arrangement for the set of plates.







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