초록 ▼

An air turbine starter with an improved seal assembly disposed between the turbine and the housing is provided. The seal assembly comprises a face seal, a non-contacting seal axially spaced therefrom to define an air filled annular chamber therebetween and a flow passage having an exit fluidly commu

An air turbine starter with an improved seal assembly disposed between the turbine and the housing is provided. The seal assembly comprises a face seal, a non-contacting seal axially spaced therefrom to define an air filled annular chamber therebetween and a flow passage having an exit fluidly communicating with said chamber and an inlet fluidly communicating with a source of air.

대표청구항 ▼

[ What is claimed is:] [4.]4. An air turbine starter comprising:a housing defining an inlet, an outlet, and a flow path communicating said inlet with said outlet for conveying a flow of pressurized air therebetween;a turbine disposed in said flow path and having a turbine shaft extending therefrom j

[ What is claimed is:] [4.]4. An air turbine starter comprising:a housing defining an inlet, an outlet, and a flow path communicating said inlet with said outlet for conveying a flow of pressurized air therebetween;a turbine disposed in said flow path and having a turbine shaft extending therefrom journaled for rotation to said housing by at least one lubricated bearing, said turbine converting the pressure energy of said pressurized air to shaft power;an output shaft journaled by said housing for transmitting said shaft power externally of said starter;a gear train coupling said turbine with said output shaft, said gear train including a one-way overrunning clutch transmitting torque to said output shaft and preventing back driving from said output shaft to said geartrain;a seal assembly disposed between said lubricated bearing and said turbine wheel, said assembly comprising a face seal and a non-contacting seal axially spaced therefrom to define an air filled annular chamber therebetween; anda flow passage having an exit fluidly communicating with said chamber and an inlet fluidly communicating with a source of air.