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公开(公告)号：US09850953B2
公开(公告)日：2017-12-26
申请号：US15261855
申请日：2016-09-09
发明人： Yuichiro Tokunaga
CPC分类号： F16C33/741 , F01D25/168 , F01D25/186 , F16C17/045 , F16C17/047 , F16C32/0633 , F16C33/74 , F16J15/3412 , F16J15/342 , F16J15/40
摘要： A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.
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公开(公告)号：US09841106B2
公开(公告)日：2017-12-12
申请号：US15122483
申请日：2015-06-25
CPC分类号： F16J15/34 , F16J15/164 , F16J15/3412
摘要： A pair of sliding parts includes a plurality of dimples formed along a circumferential direction with substantially fixed width from a cavitation formation region on an upstream side of each of the dimples to a positive pressure generation region on a downstream side of each of the dimples. An upstream beginning end of the cavitation formation region is formed in a tapered shape from a low pressure fluid side toward a high pressure fluid side, and disposed so as to overlap a positive pressure generation region of the dimple arranged on the upstream side in a radial direction. A low pressure fluid side edge of the positive pressure generation region is formed in a tapered shape from the low pressure fluid side toward the high pressure fluid side and smoothly connected to a low pressure fluid side edge of the cavitation formation region.
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公开(公告)号：US09829109B2
公开(公告)日：2017-11-28
申请号：US15400461
申请日：2017-01-06
CPC分类号： F16J15/3412 , F16J15/348
摘要： Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction between the high-pressure fluid and low-pressure fluid on the sealing face, and also prevents occurrence of cavitation which would otherwise take place in association with a sudden pressure drop due to a discharge of fluid. Disclosed is a pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge for discharging fluid to a high-pressure fluid side, wherein a buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face S on a low-pressure side of the fluid discharge.
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公开(公告)号：US20150123350A1
公开(公告)日：2015-05-07
申请号：US14400269
申请日：2013-07-31
IPC分类号： F16J15/34
CPC分类号： F16J15/3412 , F16J15/3424
摘要： A sliding component, which achieves both sealing and lubrication by preventing cavitation from occurring in the dynamic-pressure generation mechanism and thereby solving the problem of leakage that will otherwise result from such cavitation, is characterized in that, on a sealing face of one of a pair of sliding parts that slide against each other, extremely shallow grooves constituting a Rayleigh step mechanism are provided in a manner facing the high-pressure fluid side of the sealing face, while deep fluid-introduction grooves for introducing the high-pressure fluid are provided on the upstream side of the extremely shallow grooves in a manner continuing to the high-pressure fluid side.
摘要翻译： 通过防止在动压发生机构中发生气穴并由此解决否则由于这种气蚀引起的泄漏的问题，实现密封和润滑的滑动部件的特征在于，在一个 一对相对滑动的滑动部件，以与密封面的高压流体侧相对的方式设置构成瑞利阶梯机构的非常浅的槽，同时设置用于引入高压流体的深的流体导入槽 在连续高压流体侧的方式在极浅槽的上游侧。
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公开(公告)号：US20140294330A1
公开(公告)日：2014-10-02
申请号：US14292619
申请日：2014-05-30
发明人： Yuichiro Tokunaga
CPC分类号： F16C33/741 , F01D25/168 , F01D25/186 , F16C17/045 , F16C17/047 , F16C32/0633 , F16C33/74 , F16J15/3412 , F16J15/342 , F16J15/40
摘要： A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.
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公开(公告)号：US12104598B2
公开(公告)日：2024-10-01
申请号：US18012857
申请日：2021-07-01
发明人： Hiroshi Suzuki , Yuichiro Tokunaga
CPC分类号： F04C29/00 , F01C19/005 , F04C18/0215 , F04C27/008 , F04C29/02 , F16C17/045 , F04C2240/54
摘要： Provided is a sliding component capable of stably reducing the frictional resistance of a sliding surface entailing eccentric rotation. A sliding component has a sliding surface relatively sliding with eccentric rotation, in which the sliding surface includes a land and a plurality of dynamic pressure generation mechanisms arranged in a circumferential direction, the dynamic pressure generation mechanism includes a shallow groove portion and a deep groove portion, and the shallow groove portion surrounds a circumference of the deep groove portion and communicates with the deep groove portion.
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公开(公告)号：US12013040B2
公开(公告)日：2024-06-18
申请号：US17429896
申请日：2020-02-19
发明人： Hiroshi Suzuki , Tadatsugu Imura , Iwa Ou , Yuichiro Tokunaga
IPC分类号： F16J15/34 , F16J15/3256
CPC分类号： F16J15/3424 , F16J15/3416 , F16J15/3256
摘要： A pair of sliding components are disposed at a relatively rotating position at the time of running a rotary machine and formed in an annular shape in which a sealed liquid is present on one side of an inner radial side and an outer radial side and a gas is present on the remaining side thereof. A sliding surface of a sliding component is provided with a dynamic pressure generation groove which communicates with the side of a gas in a radial direction and which is configured to generate a dynamic pressure between the sliding surfaces by the gas at the time of running the rotary machine. A sliding surface of a sliding component is provided with a groove which extends in a circumferential direction.
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公开(公告)号：US11525512B2
公开(公告)日：2022-12-13
申请号：US17047631
申请日：2019-05-16
发明人： Wataru Kimura , Yuichiro Tokunaga , Yoshiaki Takigahira , Toru Kono , Hidetoshi Kasahara , Jun Hiromatsu , Takafumi Ota
摘要： Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes; inclined grooves formed at a sliding surface so as to be arranged in a circumferential direction, the inclined grooves being closed on an outer diameter side thereof and configured to generate a dynamic pressure; and supply grooves opening on a sealed fluid side and communicating with an inner diameter side of the inclined grooves.
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公开(公告)号：US11293553B2
公开(公告)日：2022-04-05
申请号：US17046261
申请日：2019-05-16
发明人： Wataru Kimura , Yuichiro Tokunaga , Yoshiaki Takigahira , Toru Kono , Hidetoshi Kasahara , Jun Hiromatsu , Takafumi Ota
IPC分类号： F16J15/34
摘要： Provided is a seal ring configured so that a fluid film can be formed between sliding surfaces across a wide range of rotation speed and configured with high lubricity. A seal ring for sealing a clearance between a rotary shaft and a housing includes, dynamic pressure grooves formed at a sliding surface of the seal ring and having positive pressure generators and negative pressure generators, and static pressure supply paths formed at the sliding surface of the seal ring to extend from an inner diameter side to an outer diameter side and to open on a sealed fluid side. Each of the positive pressure generators, each of the negative pressure generators, and each of the static pressure supply paths are arranged in description order in a circumferential direction of the sliding surface.
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公开(公告)号：US11143029B2
公开(公告)日：2021-10-12
申请号：US16462904
申请日：2017-11-17
摘要： In an exemplary embodiment, a sealing member 11 is provided between a rotating body 5 rotating while whirling within an accommodating chamber 4 partitioned by a housing and a side wall 3 of the accommodating chamber 4 and has a sliding surface S sliding on the side wall 3, and the sliding surface S includes a first lubrication mechanism 21 arranged on one side in the longitudinal direction, and a second lubrication mechanism 22 arranged on the other side in the longitudinal direction and exhibiting lubrication performance in a sliding direction different from that of the first lubrication mechanism 21, thereby improving sealing performance of the sealing member.
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