Aircraft accessory drive multiple speed transmission
AssigneeHamilton Sundstrand Corporation
InventorGlenn C. Lemmers, JR.
Life of this patent
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Abstract
A transmission assembly is provided and includes a load, an input shaft rotatably driven by a low pressure section of a turbomachine and a transmission coupled to the load and the input shaft. The transmission is operable to transmit rotation of the input shaft to the load and configured to convert a first rotational speed range of the input shaft to a second rotational speed range for transmission to the load. The second rotational speed range is narrower than the first rotational speed range.
Claims15
A transmission assembly, comprising:
- a load;
- an input shaft rotatably driven by a low pressure section of a turbomachine;
- and
- a transmission coupled to the load and the input shaft, the transmission being operable to transmit rotation of the input shaft to the load,
- the transmission being configured to convert a first rotational speed range of the input shaft to a second rotational speed range for transmission to the load, the second rotational speed range being narrower than the first rotational speed range.
A transmission assembly, comprising:
- a variable frequency generator (VFG);
- an input shaft rotatably driven by a low pressure section of a turbomachine;
- and
- a transmission coupled to the VFG and the input shaft, the transmission being operable to transmit rotation of the input shaft to the VFG,
- the transmission being configured to convert a first rotational speed range of the input shaft to a second rotational speed range for transmission to the VFG, the second rotational speed range being narrower than the first rotational speed range.
A transmission assembly for an aircraft engine, comprising:
- a variable frequency generator (VFG);
- an input shaft rotatably driven by a low pressure section of a turbomachine;
- and
- a transmission coupled to the VFG and the input shaft, the transmission being operable to transmit rotation of the input shaft to the VFG,
- the transmission including a bi-coupled planetary gear arrangement that generates three respectively overlapping gear ratios, the planetary gear arrangement being configured to convert a first rotational speed range of the input shaft to a second rotational speed range for transmission to the VFG, the second rotational speed range being narrower than the first rotational speed range.
Dependencies are inferred from the claim text.