System and method to disconnect and brake a rotating device
AssigneeHamilton Sundstrand Corporation
InventorsAaron M. Finke, Andreas C. Koenig, Tyler W. Hayes, Mustansir H. Kheraluwala
Life of this patent
Estimating the term…
Abstract
A disconnect mechanism comprises an input shaft defining a drive axis, a disconnect shaft selectively engaged with the input shaft to be driven about the drive axis by the input shaft, and a disconnect ramp operatively connected to the disconnect shaft to axially move the disconnect shaft between at least a first axial position and a second axial position. A disconnect pawl is selectively engaged with the disconnect ramp shaft, and a brake is selectively engaged with the disconnect shaft in the second axial position.
Claims20
A system for disconnecting a rotor shaft defining an axis from an input shaft, the system comprising:
- a disconnect pawl configured to engage a disconnect ramp on the rotor shaft, wherein the disconnect pawl when engaged with the disconnect ramp is configured to move the rotor shaft between a first position, a second position, and a third position;
- wherein, in the first position, the rotor shaft is coupled to the input shaft to rotate with the input shaft;
- wherein, in the second position, the rotor shaft is uncoupled from the input shaft to rotate independent from the input shaft to spin down the rotor shaft;
- and
- wherein, in the third position, the rotor shaft is engaged with a brake to stop rotation of the rotor shaft.
A system for an electric machine, the system comprising:
- a rotor operatively connected to a rotor shaft for rotation of the rotor, the rotor shaft defining an axis;
- an input shaft selectively engageable with a first end of the rotor shaft to drive rotation of the rotor shaft with the rotor shaft in an engaged position, wherein the rotor shaft further comprises a disconnect ramp at a second end of the rotor shaft opposite the first end;
- a disconnect pawl configured to selectively engage the disconnect ramp of the rotor shaft to disengage the rotor shaft from the input shaft in response to a fault signal indicative of a fault condition within the electrical machine, wherein the disconnect pawl when engaged with the disconnect ramp is configured to move the rotor shaft between a first position, a second position, and a third position;
- and
- a biasing member operatively connected to the rotor shaft and configured to bias the rotor shaft to the engaged position;
- wherein, in the first position, the rotor shaft is coupled to the input shaft to rotate with the input shaft, the first position representing the engaged position;
- wherein, in the second position, the rotor shaft is uncoupled from the input shaft to rotate independent from the input shaft to spin down the rotor shaft;
- and
- wherein, in the third position, the rotor shaft is engaged with a brake to stop rotation of the rotor shaft.
Dependencies are inferred from the claim text.