Turbine engine including an engine starter assembly
AssigneeUnison Industries, LLC
InventorsNagendra Baddam, Shiloh Montegomery Meyers, Brian Christopher Kemp, David Raju Yamarthi, Venkata Subramanya Sarma Devarakonda, David Allan Dranschack, Narendra Dev Mahadevaiah
Life of this patent
Estimating the term…
Abstract
A method and system used to control a rotational speed or a torque of an output drive shaft. The output drive shaft being coupled to a turbine engine. The turbine engine including an engine core and an engine starter assembly. The engine starter assembly including an air turbine starter, an output drive shaft and an electric motor.
Claims20
A method of operating an engine starter assembly for a turbine engine, the engine starter assembly including an output drive shaft selectively couplable to an engine drive shaft, an air turbine starter (ATS) operably coupled with the output drive shaft and selectively coupled with a supply of air through a starter air valve (SAV), and an electrical motor selectively coupled to the ATS and configured to drive at least a portion of the ATS and the output drive shaft, the method comprising:
- catching, through a rotation of the output drive shaft, the engine drive shaft after shutdown of the turbine engine;
- and
- driving, after catching the output drive shaft and at least partially by the electric motor, the engine drive shaft through the output drive shaft until a sensed temperature of the turbine engine is within a temperature threshold.
A method of operating a turbine engine comprising an engine core, an engine drive shaft, and an engine starter assembly including an output drive shaft selectively coupled to the engine drive shaft, an air turbine starter (ATS) operable coupled with the output drive shaft and selectively coupled with a supply of air through a starter air valve (SAV), and an electrical motor coupled to the ATS and configured to drive at least a portion of the ATS and the output drive shaft, the method comprising:
- starting the turbine engine by:
- supplying a flow of air to the ATS;
- driving, by the supplying the flow of air to the ATS, the engine drive shaft through the output drive shaft;
- and
- supplementing the ATS via driving, by the electric motor, the engine drive shaft through the output drive shaft such that the engine drive shaft is driven via the ATS and the electric motor simultaneously.
An engine starter assembly for a turbine engine having an engine core having a compression section, combustion section, and turbine section in serial flow arrangement, the engine core having an engine drive shaft, the engine starter assembly comprising:
- an output drive shaft selectively coupled to the engine drive shaft;
- an air turbine starter (ATS) operably coupled to the output drive shaft, the ATS being selectively coupled to a supply of air through a starter air valve (SAV);
- an electric motor coupled to the ATS and being configured to drive at least a portion of the ATS and the output drive shaft;
- a temperature sensor to measure a temperature of the turbine engine;
- and
- a controller to, after shutdown of the turbine engine, operate the electric motor to drive the engine drive shaft through the output drive shaft until the temperature of the turbine engine is within a temperature threshold.
Dependencies are inferred from the claim text.