Hybrid shaft bearing, wind generator comprising a hybrid shaft bearing, use of the hybrid shaft
AssigneeAreva Wind GmbH
InventorsSamer Mtauweg, Joachim Arndt, Klaus Pischel
Life of this patent
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Abstract
A hybrid shaft bearing, a wind generator comprising the hybrid shaft bearing, a use of the hybrid shaft bearing, and a method of operating the hybrid shaft bearing is provided. The hybrid shaft bearing comprises a hydrodynamic friction bearing and a rolling bearing. Both the hydrodynamic friction and rolling bearings cooperate with a support structure and rotatably support a shaft. The hydrodynamic friction bearing is a passive hydrodynamic bearing.
Claims16
A hybrid shaft bearing for support of a shaft of a wind generator comprising:
- a hydrodynamic friction bearing and a rolling bearing, wherein both the hydrodynamic friction and rolling bearings cooperate with a support structure and support a wind generator shaft, wherein the hydrodynamic friction bearing is a passive hydrodynamic bearing, and wherein the rolling bearing is prestressed, and wherein a pre-tension, which is applied by the rolling bearing has a value, which is equal to or greater than a minimum capacity load of the hydrodynamic friction bearing.
A wind generator comprising:
- a drive train comprising a main shaft, wherein the main shaft is supported by a hybrid shaft bearing;
- wherein the hybrid shaft bearing comprises a hydrodynamic friction bearing and a rolling bearing, wherein both the hydrodynamic friction and rolling bearings cooperate with a support structure and support a shaft, wherein the hydrodynamic friction bearing is a passive hydrodynamic bearing;
- and
- wherein the rolling bearing is prestressed, and wherein a pre-tension, which is applied by the rolling bearing has a value, which is equal to or greater than a minimum capacity load of the hydrodynamic friction bearing.
A method of using a hybrid shaft bearing to support a main shaft of a drive train in a wind generator the method comprising the steps of:
- using a hydrodynamic friction bearing and a rolling bearing, wherein both the hydrodynamic friction and rolling bearings cooperate with a support structure and support a shaft, wherein the hydrodynamic friction bearing is a passive hydrodynamic bearing, and
- wherein the rolling bearing is prestressed, and wherein a pre-tension, which is applied by the rolling bearing has a value, which is equal to or greater than a minimum capacity load of the hydrodynamic friction bearing.
A method for operating a hybrid shaft bearing, comprising:
- providing a hydrodynamic friction bearing and a rolling bearing, wherein the hydrodynamic friction bearing and the rolling bearing are arranged parallel in that both the hydrodynamic friction and rolling bearings are coupled to a support structure and rotatably support a shaft, wherein the rolling bearing is prestressed, and wherein a pre-tension, which is applied by the rolling bearing has a value, which is equal to or greater than a minimum capacity load of the hydrodynamic friction bearing, and wherein the hybrid shaft bearing comprises at least one actuator that moves a bearing part of either one or both of the hydrodynamic friction bearing and the rolling bearing;
- and
- expanding or retracting the at least one actuator during start-up or shut-down of the rotation of the shaft.
Dependencies are inferred from the claim text.