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US 12,584,521 B2Granted
Hybrid airfoil bearing with active damping
AssigneeHamilton Sundstrand Corporation
InventorsViktor Kilchyk, Brent J. Merritt
Life of this patent
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Abstract
A hybrid bearing assembly is provided and includes stationary components, a shaft disposed to rotate relative to the stationary components, passive magnetic bearing components integrated into the shaft and the stationary components to generate passive magnetic force to resist radial movement of the shaft relative to the stationary components and an active damping system. The active damping system includes a stationary coil, a magnetic element rotatable with the shaft to induce current in the stationary coil and a circuit electrically coupled with the stationary coil. The circuit is configured to determine from the current an attitude change of the shaft and the magnetic element and to apply damping current to the stationary coil to resist the attitude change.
Claims16
A hybrid bearing assembly, comprising:
- stationary components;
- a shaft disposed to rotate relative to the stationary components;
- passive magnetic bearing components integrated into the shaft and the stationary components to generate passive magnetic force to resist radial movement of the shaft relative to the stationary components;
- and
- an active damping system comprising:
- a stationary coil;
- a magnetic element rotatable with the shaft to induce current in the stationary coil;
- and
- a circuit electrically coupled with the stationary coil and configured to determine from the current an attitude change of the shaft and the magnetic element and to apply damping current to the stationary coil to resist the attitude change,
- wherein:
- the hybrid bearing assembly further comprises airfoil bearing components to supplement the passive magnetic bearing components, the airfoil bearing components comprise a top foil immediately surrounding the shaft and the passive magnetic bearing components remove a static load of the shaft on the top foil, and
- the stationary components comprise a housing defining an outer bore, a bearing sleeve supported within the outer bore and a singular bump foil completely surrounding the top foil in a circumferential direction.
9 more elements
A motor, comprising:
- stationary housing components;
- a shaft disposed to rotate relative to the stationary housing components;
- and
- a hybrid bearing assembly configured to maintain a radial position of the shaft relative to the stationary housing components and comprising:
- passive magnetic bearing components integrated into the shaft and the stationary housing components to generate passive magnetic force to resist radial movement of the shaft relative to the stationary housing components;
- and
- an active damping system comprising:
- a stationary coil;
- a magnetic element rotatable with the shaft to induce current in the stationary coil;
- and
- a circuit electrically coupled with the stationary coil and configured to determine from the current an attitude change of the shaft and the magnetic element and to apply damping current to the stationary coil to resist the attitude change,
- wherein:
- the hybrid bearing assembly further comprises airfoil bearing components to supplement the passive magnetic bearing components, the airfoil bearing components comprise a top foil immediately surrounding the shaft and the passive magnetic bearing components remove a static load of the shaft on the top foil, and
- the stationary components comprise a housing defining an outer bore, a bearing sleeve supported within the outer bore and a singular bump foil completely surrounding the top foil in a circumferential direction.
11 more elements
A motor, comprising:
- stationary housing components;
- a shaft disposed to rotate relative to the stationary housing components;
- and
- a hybrid bearing assembly configured to maintain a radial position of the shaft relative to the stationary housing components and comprising:
- passive magnetic bearing components integrated into the shaft and the stationary housing components to generate passive magnetic force to resist radial movement of the shaft relative to the stationary housing components;
- airfoil bearing components to supplement the passive magnetic bearing components;
- and
- an active damping system comprising:
- a stationary coil;
- a magnetic element rotatable with the shaft to induce current in the stationary coil;
- and
- a circuit electrically coupled with the stationary coil and configured to determine from the current an attitude change of the shaft and the magnetic element and to apply damping current to the stationary coil to resist the attitude change,
- wherein:
- the airfoil bearing components comprise a top foil immediately surrounding the shaft and the passive magnetic bearing components remove a static load of the shaft on the top foil, and
- the stationary housing components comprise a housing defining an outer bore, a bearing sleeve supported within the outer bore and a singular bump foil completely surrounding the top foil in a circumferential direction.
12 more elements
Dependencies are inferred from the claim text.