초록 ▼

A gas turbine engine including a rotor shaft includes a bearing isolation system including an isolation shaft and a pair of pilots. The pilots are disposed between the isolation and rotor shafts and connect the isolation shaft to the rotor shaft to form a gap between the isolation and rotor shafts.

A gas turbine engine including a rotor shaft includes a bearing isolation system including an isolation shaft and a pair of pilots. The pilots are disposed between the isolation and rotor shafts and connect the isolation shaft to the rotor shaft to form a gap between the isolation and rotor shafts. The pilots are positioned axially along the rotor shaft and permit the isolation shaft to move axially with respect to the rotor shaft. Each pilot includes a plurality of openings to permit cooling air to flow within the gap defined between the isolation shaft and the rotor shaft.

대표청구항 ▼

A gas turbine engine including a rotor shaft includes a bearing isolation system including an isolation shaft and a pair of pilots. The pilots are disposed between the isolation and rotor shafts and connect the isolation shaft to the rotor shaft to form a gap between the isolation and rotor shafts.

A gas turbine engine including a rotor shaft includes a bearing isolation system including an isolation shaft and a pair of pilots. The pilots are disposed between the isolation and rotor shafts and connect the isolation shaft to the rotor shaft to form a gap between the isolation and rotor shafts. The pilots are positioned axially along the rotor shaft and permit the isolation shaft to move axially with respect to the rotor shaft. Each pilot includes a plurality of openings to permit cooling air to flow within the gap defined between the isolation shaft and the rotor shaft. nd horizontal axis, said cantilever spring extending rearwardly from said second horizontal axis. 12. The invention of claim 1 wherein said spring comprises a torsion spring defining said second horizontal axis. 13. A tilt assembly for a chair comprising: a tilt housing; a back support pivotally attached to the tilt housing about a first horizontal axis, said back support moveable between at least a first position and a second position wherein the second position is at a greater rearward tilt angle than the first position; a power pack moveably mounted to said tilt housing, said power pack adjustably moveable relative to said tilt housing, said power pack comprising a spring having a portion biasing said back support at a first location when said back support is in said first position and at a second location when said back support is in said second position, said second location being a greater distance from said first horizontal axis than said first location, wherein said power pack and an entirety of said spring are translatably moveable relative to said tilt housing between at least a first and second position. 14. The invention of claim 13 wherein one of said tilt housing and said power pack comprises a slot and the other of said tilt housing and said power pack comprises a shaft, said shaft slidably engaged with said slot. 15. The invention of claim 13 wherein said power pack slidably engages a surface of said tilt housing. 16. The invention of claim 13 wherein said power pack comprises a housing and wherein said spring i