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公开(公告)号:US20200347881A1
公开(公告)日:2020-11-05
申请号:US16827500
申请日:2020-03-23
摘要: In order to effect a seal a porous material which comprises one side of two opposing surfaces is used to restrict and evenly distribute externally pressurized gas, liquid, steam, etc. between the two surfaces, exerting a force which is opposite the forces from pressure differences or springs trying to close the two faces together and so may create a non-contact seal that is more stable and reliable than hydrodynamic seals currently in use. A non-contact bearing is also disclosed having opposing surfaces with relative motion and one surface issuing higher than ambient pressure through a porous restriction, wherein the porous restriction is part of a monolithic porous body, or a porous layer, attached to lands containing a labyrinth, the porous restriction and lands configured to not distort more than 10% of a gap created from differential pressure between each side of the porous restriction.
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公开(公告)号:US10364842B2
公开(公告)日:2019-07-30
申请号:US15724938
申请日:2017-10-04
摘要: A long travel aerostatic linear stage includes a plurality of rails, a plurality of planar bearing plates, and a plurality of porous media gas bearing. The plurality of planar bearing plates are aligned with and attached to the rails. Each planar bearing plate includes a plurality of metal plates having machined air bearing surfaces. The plurality of porous media gas bearings float on the bearing plates in a non-contact frictionless manner to support a traversing load and control lateral motion of the rails. The rails may include at least one rail which supports the traversing load and at least one rail which controls the lateral motion. The bearing plates are restrained and attached to the rails in a manner that ensures the planar nature of the bearing plates are maintained and the air gap is effective.
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公开(公告)号:US10100932B2
公开(公告)日:2018-10-16
申请号:US14869539
申请日:2015-09-29
发明人: Andrew J. Devitt
IPC分类号: F04D29/10 , F16J15/34 , F16J15/40 , F16J15/16 , F04D29/12 , F16C33/74 , F16C17/04 , F16C33/12 , F04D29/051
摘要: A porous media ventless thrust bearing seal is disclosed. The porous media thrust bearing may include a primary porous media thrust bearing also serving as a seal ring including porous media positioned over a plenum and a port connected to the plenum, and conductive passages for communicating pressurized fluid to the plenums through the ports of the primary ring. The porous media ventless thrust bearing may also include a treated process gas supplied to a port which is closest to the untreated process gas, at a pressure which is higher than the untreated process gas. An inert gas (or fluid in a liquid state) may be supplied to the remaining port, at a pressure which is the same as the untreated process gas. A certain amount of treated process gas may flow into the untreated process gas, and may prevent the untreated gas from entering the porous media seal.
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公开(公告)号:US20160068360A1
公开(公告)日:2016-03-10
申请号:US14847895
申请日:2015-09-08
IPC分类号: B65H20/12
CPC分类号: B65H27/00 , B65H20/14 , B65H23/32 , B65H2301/4431 , B65H2404/1363 , B65H2406/111 , B65H2406/1131 , B65H2406/14 , B65H2406/15 , B65H2406/33
摘要: In order to provide web handling which mitigates marking of the web, externally-pressurized porous media gas bearings are used for vacuum rollers, which provide differential tension, and also for air turns, which provide non-contact turning of webs. The porous media gas bearings mitigate three of the biggest issues with the current technology, including cost, high flow rates and low pressure, and web marking. By introducing positive pressure or both, various configurations are presented which allow for improved differential tension, or non-contact conveyance. By also employing externally-pressurized radial bearings, more alternatives are provided, including conveyance and lateral motion of webs without the use of motors. Lastly, employing novel lightweight materials allows for yet other configurations which also employ some of the same aforementioned benefits.
摘要翻译: 为了提供减轻幅材标记的纸幅处理,外部加压的多孔介质气体轴承用于提供差分张力的真空辊,并且还用于提供幅材的非接触转动的空气转动。 多孔介质气体轴承减轻了当前技术中最大的三个问题,包括成本,高流量和低压,以及网络标记。 通过引入正压或两者,提出了允许改进的差动张力或非接触输送的各种构造。 通过使用外部加压的径向轴承,还提供了更多的替代方案,包括不使用马达的腹板的运输和侧向运动。 最后,采用新颖的轻质材料允许还采用一些相同的上述优点的其他构造。
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公开(公告)号:US20140286599A1
公开(公告)日:2014-09-25
申请号:US14085762
申请日:2013-11-20
IPC分类号: F16C32/06
CPC分类号: F16C32/0618 , F16C11/0666 , F16C17/107 , F16C32/0644 , F16C32/0666 , F16C32/067 , F16C32/0674 , F16C33/726 , F16C33/741 , F16C33/748 , F16C2206/02 , F16C2360/00 , F16J15/342
摘要: In order to effect a seal a porous material which comprises one side of two opposing surfaces is used to restrict and evenly distribute externally pressurized gas, liquid, steam, etc. between the two surfaces, exerting a force which is opposite the forces from pressure differences or springs trying to close the two faces together and so may create a non-contact seal that is more stable and reliable than hydrodynamic seals currently in use. A non-contact bearing is also disclosed having opposing surfaces with relative motion and one surface issuing higher than ambient pressure through a porous restriction, wherein the porous restriction is part of a monolithic porous body, or a porous layer, attached to lands containing a labyrinth, the porous restriction and lands configured to not distort more than 10% of a gap created from differential pressure between each side of the porous restriction.
摘要翻译: 为了实现密封,使用包括两个相对表面的一侧的多孔材料来限制并均匀地分布在两个表面之间的外部加压气体,液体,蒸汽等,施加与压力差相反的力 或弹簧试图将两个面关闭在一起,因此可能产生比当前使用的流体动力密封件更稳定和可靠的非接触式密封件。 还公开了一种非接触式轴承,其具有相对的表面,其相对运动和一个表面通过多孔限制发出高于环境压力,其中多孔限制是单片多孔体的一部分,或多孔层,附着到包含迷宫 ,所述多孔限制和焊盘被构造成不会使多孔限制件的每一侧之间的差压产生的间隙的10%以上的扭曲。
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公开(公告)号:US11781593B2
公开(公告)日:2023-10-10
申请号:US17894520
申请日:2022-08-24
发明人: Joshua A. Schaffstall , Dakota H. Peirce , Michael T. Sabol , Andrew Devitt , Richard D. Pollick
CPC分类号: F16C32/0618 , F16C29/025 , F16C33/16 , F16C33/748 , F16C2206/56
摘要: A non-contact air bearing having electrostatic discharge properties may comprise: a porous media element having a bearing surface; a supply line configured supply an externally pressurize gas or fluid to the porous media; and an electrostatic dissipative porous bearing layer on the bearing surface of the porous media element; wherein the externally pressurized fluid flows through the porous media element and creates a thin film between the electrostatic dissipative layer and a substrate supported by the air bearing.
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公开(公告)号:US20210364037A1
公开(公告)日:2021-11-25
申请号:US17391817
申请日:2021-08-02
发明人: Andrew DEVITT
IPC分类号: F16C32/06
摘要: An externally pressurized porous gas bearing for operating within a refrigerant environment is disclosed. The gas bearing utilizes shear heating from rotation of a rotor, thereby increasing the pressure and load capacity of the externally pressurized porous gas bearing. The gas bearing is capable of operating when the refrigerant is in a liquid phase and when the refrigerant is in a gaseous phase.
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公开(公告)号:US11078957B2
公开(公告)日:2021-08-03
申请号:US16554570
申请日:2019-08-28
发明人: Andrew Devitt
IPC分类号: F16C32/06
摘要: An externally pressurized porous gas bearing for operating within a refrigerant environment is disclosed. The gas bearing utilizes shear heating from rotation of a rotor, thereby increasing the pressure and load capacity of the externally pressurized porous gas bearing. The gas bearing is capable of operating when the refrigerant is in a liquid phase and when the refrigerant is in a gaseous phase.
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公开(公告)号:US20200072279A1
公开(公告)日:2020-03-05
申请号:US16554570
申请日:2019-08-28
发明人: Andrew Devitt
IPC分类号: F16C32/06
摘要: An externally pressurized porous gas bearing for operating within a refrigerant environment is disclosed. The gas bearing utilizes shear heating from rotation of a rotor, thereby increasing the pressure and load capacity of the externally pressurized porous gas bearing. The gas bearing is capable of operating when the refrigerant is in a liquid phase and when the refrigerant is in a gaseous phase.
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公开(公告)号:US20180066705A1
公开(公告)日:2018-03-08
申请号:US15698053
申请日:2017-09-07
发明人: Andrew Devitt , James Allen
IPC分类号: F16C32/06 , F16C35/063 , F16C35/067 , F16C39/04
CPC分类号: F16C32/0618 , F16C32/0666 , F16C32/0685 , F16C35/063 , F16C35/067 , F16C39/04 , F16C2226/74 , F16C2300/02
摘要: A gas bearing assembly includes a snap joint for attaching an externally pressurized porous gas bearing to a bearing cartridge. The gas bearing assembly has an adjustment screw which supplies a gas to an end of the adjustment screw via a through bore. The externally pressurized porous gas bearing has a housing portion with a washer and a snap ring. The gas bearing assembly additionally includes an air transfer tube positioned in the end of the adjustment screw and the housing portion. The washer and the snap ring retain the housing portion on the end of the adjustment screw to removably retain the bearing on the bearing cartridge.
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