DETECTION OF THE OVERSPEED OF A FREE TURBINE BY MEASURING USING A TORQUE METER
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Abstract
An overspeed protection device includes at least one torque measurement unit supported by an output shaft coupled mechanically to a free turbine of a turbine engine and a signal processing unit able to transmit to a turbine engine regulating system a command to reduce a flow of fuel injected if it is detected that the torque has dropped below a first datum value. The signal processing unit is shaped to command a reduction of the flow if it is detected that the torque has dropped below a first datum value, the torque measurement used to trigger the reduction being taken during a rotation corresponding to a fraction of a revolution of the output shaft.
32 Citations
28 Claims
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1-14. -14. (canceled)
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15. An overspeed protection device for a free turbine of a turbine engine comprising a gas generator comprising at least one compressor, a combustion chamber, at least one coupled turbine and a system for regulating the amount of fuel injected into said combustion chamber, the gases from said generator being directed onto said free turbine, said device comprising:
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at least one torque measurement means supported by an output shaft coupled mechanically to said free turbine; and a signal processing unit able to transmit to the turbine engine regulating system a command to reduce the flow of fuel injected if it is detected that the torque has dropped below a first datum value, wherein the signal processing unit is shaped to command a reduction of the flow if it is detected that the torque has dropped below a first datum value, the torque measurement used to trigger said reduction being taken during a rotation corresponding to a fraction of a revolution of said output shaft. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification