초록 ▼

A containment shroud is attached to the exhaust outlet of a pneumatically powered turbine engine starter for containing the turbine wheel should it be inadvertently disengaged and expelled from the starter motor. The shroud includes a radially flared annularly shaped member attached to and extending

A containment shroud is attached to the exhaust outlet of a pneumatically powered turbine engine starter for containing the turbine wheel should it be inadvertently disengaged and expelled from the starter motor. The shroud includes a radially flared annularly shaped member attached to and extending outwardly or rearwardly from the exhaust outlet of the motor. A relatively massive central cylindrical member or button is positioned within the annularly shaped member adjacent the outer opening of the annularly shaped member. Four circumferentially spaced, radially outwardly extending bars tie the button to the annularly shaped member and position it adjacent the outer opening of the annularly shaped member. Should the turbine wheel dislodge from the starter motor, it will exit through the starter exhaust opening into the annular member and contact the button and inner surface of the annular member. As it does so, the rotational energy of the wheel will be dissipated via the scrubbing action of the wheel on the button, the bars and the inner surface of the annular member. When the wheel is expelled into the annular member, it will tend to block the outer opening of the annular member. Therefore, a plurality of spaced circumferential openings are located in the annular member adjacent its connection point to the starter exhaust outlet to relieve fluid pressure in a radially outward direction from within the motor if the wheel blocks the opening.

대표청구항 ▼

A containment shroud for affixation to the exhaust duct of a fluid powered starter motor for a turbine engine, said exhaust duct including an exhaust outlet having an axis and a generally circular opening oriented transversely to said axis, said motor having a turbine wheel mounted within said motor

A containment shroud for affixation to the exhaust duct of a fluid powered starter motor for a turbine engine, said exhaust duct including an exhaust outlet having an axis and a generally circular opening oriented transversely to said axis, said motor having a turbine wheel mounted within said motor for rotation about an axis substantially coaxial with the axis of said exhaust outlet, said shroud comprising: an annularly shaped member, said member being adapted to be positioned adjacent to and to extend outwardly from the opening of said exhaust outlet, said member having an axis adapted to be oriented substantially coaxially with the axis of said exhaust outlet, said member having at least one aperture opening radially outwardly adjacent the opening of said exhaust outlet for relieveing fluid pressure from within said member and said exhaust outlet, the outer end of said member terminating in and defining an outer opening spaced outwardly from the opening of said exhaust outlet when said member is positioned adjacent said exhaust outlet, and blocking means positioned within and fixed to said annularly shaped member adjacent said outer opening, said blocking means being so oriented and constructed as to permit substantial fluid flow through said outer opening and to prevent egress of said turbine wheel from said outer opening.