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1. 发明授权

US10008899B2 Foil bearing supported motor with adjustable thrust bearing cap 有权
公开(公告)号：US10008899B2
公开(公告)日：2018-06-26
申请号：US14812439
申请日：2015-07-29
申请人： Alexander R. Nelson , Charles W. Buckley , Giridhari L. Agrawal
发明人： Alexander R. Nelson , Charles W. Buckley , Giridhari L. Agrawal
IPC分类号： H02K15/12 , H02K5/02 , H02K5/12 , H02K5/18 , H02K5/20 , H02K5/167 , H01M8/04082
CPC分类号： H02K5/02 , H01M8/04201 , H02K5/12 , H02K5/1672 , H02K5/18 , H02K5/20 , H02K2205/03
摘要： An electric motor includes a stator; an annular end cap, fastened at a first end of the stator; a threaded seat that is mounted at an outward end face of the annular end cap for receiving a first gas foil thrust bearing; a shaft, inserted through the stator, through the annular end cap, and through the threaded seat; a thrust runner mounted at an end of said shaft adjacent the threaded seat; a first gas foil thrust bearing that is mounted into the threaded seat, adjacent a face of the thrust runner facing the stator; a bearing cap that has a threaded fitting by which it is attached onto the threaded seat; and a second gas foil thrust bearing that is mounted into the bearing cap adjacent to a face of the thrust runner opposite the first gas foil thrust bearing.

2. 发明授权

US07070330B2 Hydrodynamic fluid film bearing having a key-less foil 有权
标题翻译：流体动力流体膜轴承具有无钥匙箔
公开(公告)号：US07070330B2
公开(公告)日：2006-07-04
申请号：US10782562
申请日：2004-02-19
申请人： Giridhari L. Agrawal
发明人： Giridhari L. Agrawal
IPC分类号： F16C17/03
CPC分类号： F16C17/024 , F16C43/02
摘要： An improved and enhanced hydrodynamic fluid film bearing for rotatably supporting a shaft journal is provided and includes a stationary retaining member, at least two generally cylindrical foil elements attached to one another and forming an anti-rotation fin, and a generally cylindrical resilient backing member. The retaining member has an inner surface defining a cylindrical opening for receiving a shaft journal. The inner surface also includes a longitudinally extending slot in which the anti-rotation fin formed by the foil elements is mounted so that the foil elements line at least a portion of the cylindrical opening. The resilient member is also disposed within the cylindrical opening generally concentric to and radially outward from the foil elements. The foil elements may be discrete elements attached together to form the anti-rotation fin, or alternatively formed from a single foil with a bend defining the anti-rotation fin.
摘要翻译：提供了一种用于可旋转地支撑轴颈的改进和增强的流体动力流体膜轴承，并且包括固定保持构件，至少两个大致圆柱形的箔元件，其彼此附接并形成防旋翼，以及大致圆柱形的弹性衬垫构件。保持构件具有限定用于接收轴颈的圆柱形开口的内表面。内表面还包括纵向延伸的槽，其中安装由箔元件形成的防旋转翅片，使得箔元件沿着圆柱形开口的至少一部分。弹性构件也设置在大致与箔元件同心且径向向外的圆筒形开口内。箔元件可以是附接在一起以形成防旋转翅片的离散元件，或者替代地由具有限定防旋翼的弯曲的单个箔片形成。

3. 发明授权

US07063519B2 Motor driven centrifugal compressor/blower 有权
标题翻译：电动离心式压缩机/鼓风机
公开(公告)号：US07063519B2
公开(公告)日：2006-06-20
申请号：US10612656
申请日：2003-07-02
申请人： Giridhari L. Agrawal , Charles W. Buckley
发明人： Giridhari L. Agrawal , Charles W. Buckley
IPC分类号： F04B17/03
CPC分类号： F04D29/057 , F04D25/0606 , F04D29/053 , F04D29/5806
摘要： This invention provides a small, high efficiency, oil free motor driven compressor/blower suitable for providing pressurized, contamination-free gas and or air to transportation, industrial and aerospace fuel cell systems or other contaminant-intolerant applications. The motor driven compressor/blower rotor assembly is supported by foil air bearings and rotates at high speed by using a high frequency drive. The impeller is a centrifugal type design. The MDC can be easily integrated into the air management system of a fuel cell.
摘要翻译：本发明提供了一种小型，高效率的无油马达驱动的压缩机/鼓风机，其适用于向运输，工业和航空航天燃料电池系统或其他污染物不耐受应用提供加压，无污染的气体和/或空气。电机驱动的压缩机/鼓风机转子组件由铝箔空气轴承支撑，并通过使用高频驱动器高速旋转。叶轮是离心式设计。 MDC可以轻松地集成到燃料电池的空气管理系统中。

4. 发明授权

US06948853B2 High load capacity stacked foil thrust bearing assembly 失效
标题翻译：高负载能力叠层箔推力轴承总成
公开(公告)号：US06948853B2
公开(公告)日：2005-09-27
申请号：US10608975
申请日：2003-06-27
申请人： Giridhari L. Agrawal
发明人： Giridhari L. Agrawal
IPC分类号： F01D25/16 , F16C17/04 , F16C17/12 , F16C32/06
CPC分类号： F16C17/042 , F01D25/168 , F05D2240/52 , Y02T50/671
摘要： A stacked foil thrust bearing assembly provides a compact, lightweight, high load capacity, high temperature, oil-free foil thrust bearing for use in high speed rotating machinery. A stacked foil thrust bearing assembly comprises a plurality of thrust runners in adjacently spaced and parallel relationship. Each thrust runner includes an annular-shaped portion having generally opposite axial sides, and a thrust bearing positioned on each of the generally opposite axial sides. Each thrust bearing includes a thrust bearing plate and a spring plate operatively engaging the thrust bearing plate. A plurality of foils are circumaxially dispersed about one axial side of the thrust bearing plates. A plurality of springs are circumaxially dispersed about one axial side of the spring bearing plates.
摘要翻译：堆叠的箔推力轴承组件提供了一种紧凑，重量轻，高负荷能力的高温无油箔推力轴承，用于高速旋转机械。堆叠的箔片推力轴承组件包括相邻间隔和平行关系的多个推力滑轮。每个推力滑轮包括具有大致相对的轴向侧面的环形部分，以及定位在每个大致相对的轴向侧上的推力轴承。每个止推轴承包括止推轴承板和与止推轴承板可操作地接合的弹簧板。多个箔围绕推力轴承板的一个轴向侧面环绕分散。多个弹簧在弹簧支承板的一个轴向侧周向分散。

5. 发明申请

US20050189720A1 Dynamic seal for use in high-speed turbomachinery 审中-公开
标题翻译：动力密封用于高速涡轮机械
公开(公告)号：US20050189720A1
公开(公告)日：2005-09-01
申请号：US11064708
申请日：2005-02-24
申请人： Giridhari Agrawal
发明人： Giridhari Agrawal
IPC分类号： F01D11/00 , F01D11/02 , F04D29/12 , F16J9/00 , F16J15/44
CPC分类号： F04D29/624 , F01D11/003 , F01D11/02 , F04D29/122 , F16J15/441
摘要： An improved and enhanced dynamic seal for use in high-speed turbomachinery includes an inner ring coupled to an outer sleeve. The coupling between the inner ring and the outer sleeve is strengthened by forming an increased surface area, exhibited by recesses, in at least one of the outer surface of the inner ring and the inner surface of the outer sleeve, and by providing an adhesive material in the recesses to bond the inner ring to the outer sleeve.
摘要翻译：用于高速涡轮机械的改进和增强的动态密封件包括联接到外套筒的内圈。通过在内圈的外表面和外套筒的内表面中的至少一个中形成增加的凹部表现的表面积，并且通过提供粘合材料来增强内圈和外套筒之间的联接在凹部中将内圈粘合到外套筒上。

6. 发明申请

US20050185865A1 Hydrodynamic fluid film bearing having a key-less foil 有权
标题翻译：流体动力流体膜轴承具有无钥匙箔
公开(公告)号：US20050185865A1
公开(公告)日：2005-08-25
申请号：US10782562
申请日：2004-02-19
申请人： Giridhari Agrawal
发明人： Giridhari Agrawal
IPC分类号： F16C27/02 , F16C17/02 , F16C17/12 , F16C32/02 , F16C32/06
CPC分类号： F16C17/024 , F16C43/02
摘要： An improved and enhanced hydrodynamic fluid film bearing for rotatably supporting a shaft journal is provided and includes a stationary retaining member, at least two generally cylindrical foil elements attached to one another and forming an anti-rotation fin, and a generally cylindrical resilient backing member. The retaining member has an inner surface defining a cylindrical opening for receiving a shaft journal. The inner surface also includes a longitudinally extending slot in which the anti-rotation fin formed by the foil elements is mounted so that the foil elements line at least a portion of the cylindrical opening. The resilient member is also disposed within the cylindrical opening generally concentric to and radially outward from the foil elements. The foil elements may be discrete elements attached together to form the anti-rotation fin, or alternatively formed from a single foil with a bend defining the anti-rotation fin.
摘要翻译：提供了一种用于可旋转地支撑轴颈的改进和增强的流体动力流体膜轴承，并且包括固定保持构件，至少两个大致圆柱形的箔元件，其彼此附接并形成防旋翼，以及大致圆柱形的弹性衬垫构件。保持构件具有限定用于接收轴颈的圆柱形开口的内表面。内表面还包括纵向延伸的槽，其中安装由箔元件形成的防旋转翅片，使得箔元件沿着圆柱形开口的至少一部分。弹性构件也设置在大致与箔元件同心且径向向外的圆筒形开口内。箔元件可以是附接在一起以形成防旋转翅片的离散元件，或者替代地由具有限定防旋翼的弯曲的单个箔片形成。

7. 发明申请

US20050147335A1 HIGH LOAD CAPACITY STACKED FOIL THRUST BEARING ASSEMBLY 失效
标题翻译：高负载能力堆叠式密封轴承组件
公开(公告)号：US20050147335A1
公开(公告)日：2005-07-07
申请号：US10608975
申请日：2003-06-27
申请人： Giridhari Agrawal
发明人： Giridhari Agrawal
IPC分类号： F01D25/16 , F16C17/04 , F16C17/12 , F16C32/06
CPC分类号： F16C17/042 , F01D25/168 , F05D2240/52 , Y02T50/671
摘要： A stacked foil thrust bearing assembly provides a compact, lightweight, high load capacity, high temperature, oil-free foil thrust bearing for use in high speed rotating machinery. A stacked foil thrust bearing assembly comprises a plurality of thrust runners in adjacently spaced and parallel relationship. Each thrust runner includes an annular-shaped portion having generally opposite axial sides, and a thrust bearing positioned on each of the generally opposite axial sides. Each thrust bearing includes a thrust bearing plate and a spring plate operatively engaging the thrust bearing plate. A plurality of foils are circumaxially dispersed about one axial side of the thrust bearing plates. A plurality of springs are circumaxially dispersed about one axial side of the spring bearing plates.
摘要翻译：堆叠的箔推力轴承组件提供了一种紧凑，重量轻，高负荷能力的高温无油箔推力轴承，用于高速旋转机械。堆叠的箔片推力轴承组件包括相邻间隔和平行关系的多个推力滑轮。每个推力滑轮包括具有大致相对的轴向侧面的环形部分，以及定位在每个大致相对的轴向侧上的推力轴承。每个止推轴承包括止推轴承板和与止推轴承板可操作地接合的弹簧板。多个箔围绕推力轴承板的一个轴向侧面环绕分散。多个弹簧在弹簧支承板的一个轴向侧周向分散。

8. 发明授权

US11025121B2 Foil bearing supported motor with adjustable thrust bearing cap 有权
公开(公告)号：US11025121B2
公开(公告)日：2021-06-01
申请号：US15983257
申请日：2018-05-18
申请人： R&D Dynamics Corporation
发明人： Alexander R. Nelson , Charles W. Buckley , Giridhari L. Agrawal
IPC分类号： H02K5/02 , H02K5/12 , H02K5/18 , H02K5/20 , H02K5/167 , H01M8/04082
摘要： An electric motor includes a stator; an annular end cap, fastened at a first end of the stator; a threaded seat that is mounted at an outward end face of the annular end cap for receiving a first gas foil thrust bearing; a shaft, inserted through the stator, through the annular end cap, and through the threaded seat; a thrust runner mounted at an end of said shaft adjacent the threaded seat; a first gas foil thrust bearing that is mounted into the threaded seat, adjacent a face of the thrust runner facing the stator; a bearing cap that has a threaded fitting by which it is attached onto the threaded seat; and a second gas foil thrust bearing that is mounted into the bearing cap adjacent to a face of the thrust runner opposite the first gas foil thrust bearing.

9. 发明授权

US09951784B2 Mechanically-coupled turbomachinery configurations and cooling methods for hermetically-sealed high-temperature operation 有权
公开(公告)号：US09951784B2
公开(公告)日：2018-04-24
申请号：US13191979
申请日：2011-07-27
申请人： Giridhari L. Agrawal , Charles W. Buckley , Muthusamy Rajendran
发明人： Giridhari L. Agrawal , Charles W. Buckley , Muthusamy Rajendran
IPC分类号： F04D25/02 , F04D29/04 , F04D13/02 , F04D29/054 , F04D29/58 , F04D25/06
CPC分类号： F04D25/024 , F04D13/021 , F04D25/0606 , F04D29/0405 , F04D29/054 , F04D29/5806
摘要： A hermetically-sealed turbomachine, such as a motor-driven blower and a turbine driven generator, capable of reliable high-temperature operation, especially for large sized turbomachine includes a hot blower, compressor or turbine end of the turbomachine that is separated from the cooler electric motor, generator or alternator end of the turbomachine by a compliant mechanical coupling and a thermal choke assembly. The turbomachine housing is also hermetically sealed, providing control over the process gas within the machine housing, and permitting an internal cooling method within the turbomachine, whereby a small amount of process gas itself is used within the turbomachine for providing cooling of the rotating shafts, the axial fan, radial fan, or turbine impeller, the bearings and the electric motor, generator or alternator disposed within the turbomachine housing. The cooling method can be aided by a heat exchanger operatively communicating with the turbomachine.

10. 发明授权

US09476428B2 Ultra high pressure turbomachine for waste heat recovery 有权
标题翻译：用于废热回收的超高压涡轮机
公开(公告)号：US09476428B2
公开(公告)日：2016-10-25
申请号：US13484751
申请日：2012-05-31
申请人： Giridhari L. Agrawal , Charles W. Buckley , Ali Shakil , Andrew Hamilton Coward
发明人： Giridhari L. Agrawal , Charles W. Buckley , Ali Shakil , Andrew Hamilton Coward
IPC分类号： F04D25/08 , F04D29/58 , F04D25/02 , F01D15/10 , F01D25/12 , F01D25/16 , H02K1/32 , F04D25/06
CPC分类号： F04D25/024 , F01D15/10 , F01D25/125 , F01D25/168 , F04D25/0606 , H02K1/32
摘要： A turbine-driven alternator (i.e., a turbomachine) suitable for generating electrical power from process gas waste energy. In particular suitable for very high density process gases such as super critical CO2, R134a, R245fa, etc. The turboalternator comprises two separate machines, specifically, a turbine device and an alternator device operatively connected together by a coupling shaft. The rotating shaft assemblies for each machines on the turbine side and the alternator side are supported by hydrodynamic foil gas bearings. The foil gas bearings use process gas at the turbine side, enabling high-pressure operation (˜3000 psia) and thrust load balancing. At the alternator side, cooling fluid is used in the foil gas bearings, enabling high-speed (˜40,000 rpm), low-windage, oil-free operation with closed-loop shaft cooling.
摘要翻译：适用于从工艺废气能量产生电能的涡轮机驱动的交流发电机（即，涡轮机）。特别适合于非常高密度的工艺气体，例如超临界CO2，R134a，R245fa等。涡轮分离器包括两个独立的机器，具体地，涡轮装置和通过联接轴可操作地连接在一起的交流发电机装置。涡轮机侧和交流发电机侧的每个机器的旋转轴组件由流体动力箔气体轴承支撑。箔气体轴承在涡轮机侧使用工艺气体，可实现高压运行（〜3000 psia）和推力负载平衡。在交流发电机侧，冷却流体用于箔气体轴承，通过闭环轴冷却可实现高速（约40,000 rpm），低风量，无油运行。

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