Turbomachine dual spool transmission systems
AssigneeHamilton Sundstrand Corporation
InventorsAaron M. Finke, Stephen Michael Bortoli, Jonathan C. Dell
Life of this patent
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Abstract
A turbomachine dual spool transmission system can include a transmission assembly configured to connect to a combination output of a dual spool differential at a transmission input to be driven by the combination output to turn a transmission output. The transmission assembly can be configured to provide a first output gear ratio in a first state and a second output gear ratio in a second state. The system can include the dual spool differential. The dual spool differential can include a gear assembly configured to combine a low pressure spool input and a high pressure spool input into a combination output to provide an output speed range smaller than a low pressure speed range alone.
Claims20
A turbomachine dual spool transmission system, comprising:
- a transmission assembly configured to connect to a combination output of a dual spool differential at a transmission input to be driven by the combination output to turn a transmission output, wherein the transmission assembly is configured to provide a first output gear ratio in a first state and a second output gear ratio in a second state.
A turbomachine, comprising:
- a high pressure spool;
- a low (or intermediate) pressure spool;
- and
- a dual spool differential comprising a gear assembly connected to the low pressure spool at a low pressure spool input and the high pressure spool at a high pressure spool input, the gear assembly configured to combine the low pressure spool input and the high pressure spool input into a combination output to provide an output speed range smaller than a low pressure speed range alone;
- and
- a transmission assembly connected to the combination output at a transmission input to be driven by the combination output to turn a transmission output, the transmission configured to provide a first output gear ratio in a first state and a second output gear ratio in a second state.
A method, comprising:
- combining a low pressure spool input of a turbomachine and a high pressure spool turbomachine into a combination output to produce a reduced speed range relative to a low pressure spool speed range alone;
- and
- maintaining an accessory speed range using a transmission connected to the combination output by selectively switching between a first state having a first gear ratio and a second state having a second gear ratio.
Dependencies are inferred from the claim text.