초록 ▼

A servo mechanical control for efficiently bringing a rotating turbine wheel of a turbine engine having a multi-stage stator assembly to a non-rotating condition and for maintaining the turbine wheel in a non-rotating condition. The servo mechanical control includes a detector for detecting the dire

A servo mechanical control for efficiently bringing a rotating turbine wheel of a turbine engine having a multi-stage stator assembly to a non-rotating condition and for maintaining the turbine wheel in a non-rotating condition. The servo mechanical control includes a detector for detecting the direction of rotation of the turbine wheel and a control device interconnected with the multi-stage stator assembly and operable, in response to the detection of the turbine wheel in either predetermined direction, to displace the multi-stage stator assembly to a position causing a reverse torque on the turbine wheel. The detector preferably consists of at least one brake body pivotally interconnected with the vehicle and selectively operable to engage the output shaft of the turbine wheel. When engaged with the output shaft, the brake body is pivoted in response to angular motion of the turbine wheel. The control device preferably includes a piston and cylinder assembly interconnected with the multi-stage stator assembly and a valve responsive to the angular position of the brake body to selectively interconnect the sides of the piston and cylinder assembly with a pump and a sump.

대표청구항 ▼

In a gas turbine engine for driving a vehicle, said gas turbine engine comprising a turbine housing having a free turbine wheel rotatably mounted therein, and inlet means for directing a gas radially inwardly towards said free turbine wheel, the improvement comprising: a multi-stage stator assembly;

In a gas turbine engine for driving a vehicle, said gas turbine engine comprising a turbine housing having a free turbine wheel rotatably mounted therein, and inlet means for directing a gas radially inwardly towards said free turbine wheel, the improvement comprising: a multi-stage stator assembly; a reverse stage of said multi-stage stator assembly, said reverse stage having predetermined shaped reverse vanes set at a reverse preselected angle of incidence angle of incidence such as to cause a reverse rotation of said free turbine wheel while minimizing losses due to momentum when said reverse stage is positioned over said inlet means; a forward stage of said multi-stage stator assembly disposed adjacent said reverse stage, said forward stage having forward vanes set at a forward preselected angle of incidence such as to cause forward rotation of said free turbine wheel when said forward stage is positioned over said inlet means, said multi-stage stator assembly being selectively positionable adjacent said inlet means such as to provide a simultaneous partial positioning of said reverse stage and said forward stage over said inlet means to cause said free turbine wheel to experience a zero net force, whereby said free turbine wheel is in a neutral non-driving condition; mounting means mounting said multi-stage stator assembly to said inlet means for relative movement therebetween; detector means interconnected with said vehicle and operative to detect the direction of angular rotation of said free turbine wheel, said detector means further comprising at least one brake body pivotally interconnected with said vehicle, said at least one brake body being selectively reciprocably engageable with said free turbine wheel for braking engagement thereof such that said detector means operatively brakes rotation of said free turbine wheel while said control means operatively maintains said free turbine wheel in an idle position while said free turbine wheel is in said neutral non-driving condition; and control means operatively connected to said multi-stage stator assembly to selectively displace said multi-stage stator assembly relative to said inlet means to cause a net torque on said free turbine wheel such as to decelerate said free turbine wheel.