Thermally operated rotatable component restraint system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02K-005/16
F16C-027/02
출원번호
UP-0708621
(2007-02-20)
등록번호
US-7728475
(2010-06-22)
발명자
/ 주소
Himmelmann, Richard A.
출원인 / 주소
Hamilton Sundstrand Corporation
대리인 / 주소
Kinney & Lange, P.A.
인용정보
피인용 횟수 :
3인용 특허 :
7
초록▼
A turboalternator system includes a turboalternator having a rotatable member operatively engaged to a bearing set, a radial support element, and a contact structure engaged with the radial support element. The rotatable member defines a first end, a second end and an axis of rotation. The turboalte
A turboalternator system includes a turboalternator having a rotatable member operatively engaged to a bearing set, a radial support element, and a contact structure engaged with the radial support element. The rotatable member defines a first end, a second end and an axis of rotation. The turboalternator system is configured to be thermally adjustable such that in a first thermal condition the contact structure is at a first radial position with respect to the axis of rotation and contacts the rotatable member to provide support, and in a second thermal condition the contact structure is at a second radial position with respect to the axis of rotation that is spaced further from the axis of rotation than the first radial position.
대표청구항▼
What is claimed is: 1. A turboalternator system comprising: a turboalternator having a rotatable member operatively engaged to a bearing set, the rotatable member defining a first end, a second end and an axis of rotation; a radial support element; a contact structure engaged with the radial suppor
What is claimed is: 1. A turboalternator system comprising: a turboalternator having a rotatable member operatively engaged to a bearing set, the rotatable member defining a first end, a second end and an axis of rotation; a radial support element; a contact structure engaged with the radial support element, wherein the turboalternator system is configured to be thermally adjustable such that in a first thermal condition the contact structure is at a first radial position with respect to the axis of rotation and contacts the rotatable member to provide support, and wherein the turboalternator system is further configured such that in a second thermal condition the contact structure is at a second radial position with respect to the axis of rotation that is spaced further from the axis of rotation than the first radial position; and a groove formed in the rotatable member, wherein in the first thermal condition the contact structure extends into the groove to restrict axial movement of the rotatable member. 2. The system of claim 1 and further comprising: a housing, wherein the bearing set supports the rotatable member relative to the housing during operation of the turboalternator. 3. The system of claim 1, wherein the radial support element includes a first restraint ring comprising a first material and positioned about the rotatable member, and a strut comprising a second material that extends between the first restraint ring and the contact structure. 4. The system of claim 1, wherein the radial support element is located at or near the first end of the rotatable member. 5. The system of claim 1, wherein the contact structure comprises a ring having a groove formed in an outer diameter surface, and wherein the radial support element engages the groove in the contact structure. 6. The system of claim 1, wherein the first thermal condition comprises a temperature range that is below a minimum operating temperature of the turboalternator. 7. The system of claim 1 and further comprising: a dry film lubricant disposed on a surface of the contact structure that contacts the rotatable member in the first thermal condition. 8. The system of claim 1, wherein the bearing set comprises a foil bearing. 9. The system of claim 1 and further comprising: a heating element for actively supplying thermal energy to the radial support element. 10. A thermally adjustable restraint system for a rotatable member supported on a housing by a bearing set comprising: a first restraint ring positionable around the rotatable member at or near a first end, the first restraint ring having a plurality of thermally motive elements extending therefrom, each thermally motive element being engaged to a pad structure, wherein the plurality of thermally motive elements extending from the first restraint ring are each configured such that in a first thermal condition the pad structure contacts the rotatable member to provide support, and wherein each of the thermally motive elements extending from the first restraint ring is further configured such that in a second thermal condition the pad structure is generally spaced from the rotatable member; a second restraint ring positionable around the rotatable member at or near a second end, the second restraint ring having a plurality of thermally motive elements extending therefrom, each thermally motive element being engages to a pad structure, wherein the plurality of thermally motive elements extending from the second restraint ring are each configured such that in the first thermal condition the pad structure contacts the rotatable member to provide support, and wherein each of the thermally motive elements extending from the second restraint ring is further configured such that in the second thermal condition the pad structure is generally spaced from the rotatable member; and a groove formed in the rotatable member, wherein in the first thermal condition the pads of the thermally motive elements of the first restraint ring extend into the groove to restrict axial movement of the rotatable member. 11. The system of claim 10, wherein the first thermal condition is lower in temperature than the second thermal condition. 12. The system of claim 10, wherein the rotatable member comprises a shaft of a turboalternator, and wherein the first thermal condition comprises a temperature range that is below a minimum operating temperature of the turboalternator. 13. The system of claim 10 and further comprising: a dry film lubricant disposed on a surface of each pad structure that contacts the rotatable member in the first thermal condition. 14. The system of claim 10, wherein the bearing set comprises a foil bearing. 15. The system of claim 10 and further comprising: a heating element for actively supplying thermal energy to at least one of the thermally motive elements. 16. A selectively adjustable restraint system for a turboalternator having a rotatable member that defines a first end, a second end and an axis of rotation, and a foil bearing configured to support the rotatable member during operation, the system comprising: a first bimetallic support structure positioned around the rotatable member at or near the first end, the first bimetallic support structure having a first ring portion and a first pad portion supported by the first ring portion and configured such that in a first thermal condition the first pad portion contacts the rotatable member to provide support at or near the first end of the rotatable structure, and in a second thermal condition the first pad portion is generally spaced from the axis of rotation at a greater radial distance than in the first thermal condition; and a second bimetallic support structure positioned around the rotatable member at or near the second end, the second bimetallic support structure having a second ring portion and a second pad portion configured such that in the first thermal condition the second pad structure contacts the rotatable member to provide support at or near the second end of the rotatable structure, and in a second thermal condition the second pad portion is generally spaced from the axis of rotation at a greater radial distance than in the first thermal condition; a groove formed in the rotatable member, wherein in the first thermal condition the first pad portion of the first bimetallic structure extends into the groove to restrict axial movement of the rotatable member, wherein the second thermal condition is greater in temperature than the first thermal condition. 17. The system of claim 16, wherein the first thermal condition comprises a temperature range that is below a minimum operating temperature of the turboalternator. 18. The system of claim 16 and further comprising: a dry film lubricant disposed on surfaces of the first and second pad portions that contact the rotatable member in the first thermal condition. 19. The system of claim 16 and further comprising: a heating element for actively supplying thermal energy to at least one of the bimetallic support structures. 20. The system of claim 16, wherein the first pad portion comprises a ring having a groove formed in an outer diameter surface, and wherein a protrusion extending from the first ring portion engages the groove in the pad structure. 21. The system of claim 16, wherein the first bimetallic structure further comprises a strut comprising a first material that extends between the first ring portion and the first pad portion, wherein the first ring portion comprises a second material.
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