Low pressure turbine for jet engine of aircraft, has case mounted inside sealing sectors, where each sector comprises hook with end in form of axial annular stop extending radially towards exterior and supported against upstream end of rib

摘要

#CMT# #/CMT# The turbine has a case (11) housing an impeller and mounted inside sealing sectors (17), which form a ring and are fixed to the case. Each sector has an external base (18) supporting an internal lining (20) and comprises a hook assembled at an internal annular rib (34a) of the case. The hook comprises an end in the form of an axial annular stop (40) extending radially towards exterior and supported against an upstream end (42) of the rib. #CMT#USE : #/CMT# Used in a jet engine of an aircraft. #CMT#ADVANTAGE : #/CMT# The arrangement of the hook and rib permits the mounting and dismounting of the sealing sectors in an easy manner without tilting the sectors and moving a rotor of the turbine, so that the clearance between impeller blade and the ring of the sealing sectors is reduced, thus reducing residual loss and improving the efficiency of the turbine. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of a low pressure turbine. 11 : Case 17 : Sealing sectors 18 : External base 20 : Internal lining 34a : Internal annular rib 40 : Axial annular stop 42 : Rib`s upstream end.