High to low pressure spool summing gearbox for accessory power extraction and electric start
First Claim
1. A turbine engine comprising:
- low and high pressure spools;
a high power take-off shaft coupled to the high pressure spool;
a first auxiliary component configured to be driven by the high power take-off shaft at a first speed;
a gearbox interconnecting the low pressure spool to the first auxiliary component, the gearbox configured to drive the first auxiliary component at a second speed greater than the first speed;
a low power take-off shaft coupled to the low pressure spool and a second auxiliary component configured to be driven by the low power take-off shaft;
wherein the gearbox interconnects the low and high power take-off shafts; and
wherein the gearbox includes an epicyclic gear train configured to receive a rotational input from the low power take-off shaft for increasing a rotational speed provided to the second auxiliary component.
1 Assignment
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Accused Products
Abstract
A turbine engine includes low and high pressure spools. A high power take-off shaft is coupled to the high spool. An auxiliary component, such as a generator, is configured to be driven by the high power take-off shaft at a first speed. The low spool, in part, drives the auxiliary component, for example, by interconnecting the high power take-off shaft to a lower power take-off shaft through a speed summing gearbox. The gearbox drives the auxiliary component and increases the rotational speed of the auxiliary component from the first speed to the second speed. The low power take-off shaft also drives another generator, in one example. The turbine engine can be started by the low pressure generator, for example, in response to a command from a controller, which transforms the generator into a starter motor.
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Citations
9 Claims
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1. A turbine engine comprising:
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low and high pressure spools; a high power take-off shaft coupled to the high pressure spool; a first auxiliary component configured to be driven by the high power take-off shaft at a first speed; a gearbox interconnecting the low pressure spool to the first auxiliary component, the gearbox configured to drive the first auxiliary component at a second speed greater than the first speed; a low power take-off shaft coupled to the low pressure spool and a second auxiliary component configured to be driven by the low power take-off shaft; wherein the gearbox interconnects the low and high power take-off shafts; and wherein the gearbox includes an epicyclic gear train configured to receive a rotational input from the low power take-off shaft for increasing a rotational speed provided to the second auxiliary component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification