Locking system for air intake structure for turbojet engine nacelle

Abstract

The invention relates to a nacelle for a turbojet engine that comprises an air intake structure ( 2 ) capable of directing an air flow towards a fan of the turbojet engine, and an intermediate structure for surrounding said fan and to which the air intake structure is attached in order to ensure aerodynamic continuity, wherein the air intake structure includes, on the one hand, at least one inner panel ( 21 ) attached to the intermediate structure and defining with the latter a fixed nacelle structure and, on the other hand, at least one longitudinal outer panel ( 20 ) removably attached to the fixed structure and including an air intake lip ( 2 a ) in order to form a removable air intake structure, characterised in that the air intake structure is provided with peripheral locking means including at least one locking means ( 10 ) attached to the inner panel or to the air intake lip and each capable of interacting with an additional retaining means ( 11 ) respectively attached to the air intake lip or to the inner panel.

1 . A nacelle for turbojet engine comprising:
 an air intake structure capable of directing an air flow towards a fan of the turbojet engine, and   a middle structure for surrounding said fan and to which is attached the air intake structure in order to provide aerodynamic continuity,   wherein the air intake structure includes at least one inner panel attached to the middle structure and defining, with the latter, a nacelle fixed structure and at least one outer longitudinal panel removably attached to the fixed structure and including an air intake lip in order to define a removable air intake structure,   the air intake structure is provided with peripheral locking means including at least one locking means attached to the inner panel or to the air intake lip and each capable of cooperating with a complementary retaining means attached to the air intake lip or the inner panel, respectively.   
     
     
         2 . The nacelle according to  claim 1 , the locking means comprises a hook. 
     
     
         3 . The nacelle according to  claim 2 , the hook is a hook with three-point projection system. 
     
     
         4 . The nacelle according to  claim 3 , the hook is a rotating hook. 
     
     
         5 . The nacelle according to  2 , the complementary retaining means is a yoke. 
     
     
         6 . The nacelle according to  2 , the complementary retaining means assumes form of a return presented by one end of the air intake lip or of the inner panel. 
     
     
         7 . The nacelle according to  1 , the inner panel or the air intake lip comprises at least one centering pin capable of cooperating with a corresponding bore of the air intake lip or of the inner panel, respectively. 
     
     
         8 . The nacelle according to  claim 7 , the centering pin is mounted rotatingly mobile and has one end in form of a cam capable of going alternatingly between an unlocking position in which the cam-type end can be removed from the complementary retaining means and a locking position in which the cam-type end abuts against the complementary retaining means and cannot be removed therefrom. 
     
     
         9 . The nacelle according to  claim 7 , the centering pin is mounted rotatingly mobile and has an outer thread capable of cooperating with an internal tapping of the corresponding bore. 
     
     
         10 . The nacelle according to  claim 9 , the tapped bore comprises a ball bearing system. 
     
     
         11 . The nacelle according to  claim 7 , that the centering pin has a transverse bore capable of forming a complementary retaining means. 
     
     
         12 . The nacelle according to  1 , the locking means is an electric locking means capable of being remotely controlled. 
     
     
         13 . The nacelle according to  1 , the locking means is a manual locking means capable of being remotely controlled by a manual driving means of the cable or cardan mechanical return type. 
     
     
         14 . The nacelle according to  12 , the control means of the locking means are centralized. 
     
     
         15 . The nacelle according to claim, the control member is a handle, preferably retractable, capable of allowing driving of the air intake structure in motion. 
     
     
         16 . The nacelle according to  1 , electric bolt(s) is/are associated with at least one means for detecting the locking and/or unlocking position. 
     
     
         17 . The nacelle according to  1 , prestressing of the locking means can be adjusted.