Tooling For Partial Disassembly Of A Bypass Turbofan Engine

Abstract

Tooling for partial disassembly of a bypass turbofan engine wherein the longitudinal axis of the bypass turbofan engine remains generally horizontal during disassembly. The low pressure turbine module is removed with a low pressure turbine module horizontal removal tool. An extended bearing nut tool may be supported by a stabilization member and may remove a bearing nut. An extended high pressure turbine shaft stretching tool may stretch a high pressure turbine shaft to release a high pressure turbine shaft nut. An extended bearing pulling tool may be used to pull a bearing while the low pressure turbine shaft remains in place. A modified measurement bridge may be used to measure the position of certain components while the low pressure turbine shaft remains in place. A nozzle jig may be used to assemble nozzles and feather seals to create a nozzle module. And an arcuate datum may be used to make certain measurements from the aft end of the high pressure turbine shaft while the low pressure turbine shaft remains in place.

I claim: 
     
         1 . A tool adapted to remove a low pressure turbine module from a bypass turbofan engine while said bypass turbofan engine's longitudinal axis is generally horizontal, said tool comprising:
 an attachment member adapted to connect to said low pressure turbine module; and   a lift member, said lift member having a lift point positioned generally over the center of gravity of said tool and said connected low pressure turbine module, said lift point being connectable to a lift.   
     
     
         2 . The tool of  claim 1  where:
 additionally comprising an engagement member detachably connected to said attachment member. 
 
     
     
         3 . The tool of  claim 2  wherein:
 said lift member is pivotally connectable to said engagement member such that said low pressure turbine module may rotate about its longitudinal axis when connected to said lift member. 
 
     
     
         4 . The tool of  claim 1  wherein:
 said lift member is pivotally connectable to said engagement member such that said connected low pressure turbine module's longitudinal axis may be rotated from being generally horizontal to being generally vertical about a pivot in said lift member. 
 
     
     
         5 . The low-pressure turbine module removal tool of  claim 1 , wherein said lift member compromises:
 a first member;   a second member;   a bracket connected to said first member; and,   said second member being pivotally connected to said bracket such that said second member may be fixed in a first position relative to said second member and rotated to a second position relative to said second member.   
     
     
         6 . The low-pressure turbine module removal tool of  claim 1 , wherein:
 said low-pressure turbine module attachment member detachably connects to said low-pressure turbine module by compressing a portion of said low-pressure turbine module against a portion of said low pressure turbine module attachment member.   
     
     
         7 . The low-pressure turbine module attachment member of  claim 6 , wherein:
 said low-pressure turbine module engagement member has a flange positionable adjacent a low-pressure turbine module lip; and,   a plurality of brackets are adapted to compress said lip against said flange.   
     
     
         8 . The low-pressure turbine module removal tool of  claim 1 , wherein:
 said low-pressure turbine module attachment member is detachably connectable to said low pressure turbine module;   said low-pressure turbine module attachment member is detachably connectable to a hub; and   said hub being rotationably connected to said lift member.   
     
     
         9 . A bypass turbofan bearing nut removal tool adapted for use with a bypass turbofan engine oriented such that its longitudinal axis is generally horizontal comprising:
 a first member adapted to engage a slot;   a second member in rotational engagement with said first member;   said second member adapted to engage a nut;   said first and said second member adapted to create counteracting torques such that said nut may be rotated; and   said tool having a replaceable wear surface.