Patent ID: 6622473
Filing Date: 2003-09-23
Classification: F01D,F02C,Y02T,Y10S

Abstract:
A turbojet engine having an engine casing, a fan and a speed reducing gear unit operatively connected to a turbine shaft and constructed to rotatably drive a fan shaft connected to said fan, said speed reducing gear unit comprising:a planet gear fixed to said turbine shaft for rotation therewith; a satellite gear support fixed to said engine casing; a plurality of satellite gears having helical teeth and mounted to said satellite gear support in operative engagement with said planet gear; and a ring gear having helical teeth and fixed to said fan shaft for rotation in operative engagement with said satellite gears; wherein said helical teeth of said satellite gears and said ring gear cooperate to balance an axial load distribution along said fan shaft; wherein each of said plurality of satellite gears has an upstream end and a downstream end located along an axis of rotation about said satellite gear support, said planet gear engaging with said satellite gears at said upstream end, and said ring gear engaging with said satellite gears at said downstream end, said planet gear and said ring gear being axially spaced from one another in relation to respective operative engagement with said satellite gears.