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公开(公告)号：US20180017163A1
公开(公告)日：2018-01-18
申请号：US15547422
申请日：2016-02-08
发明人： Takeshi HOSOE , Hideyuki INOUE , Yuta NEGISHI
CPC分类号： F16J15/164 , C10N2240/02 , F16C17/04 , F16C17/045 , F16C33/1065 , F16C2240/44 , F16J15/34 , F16J15/3412 , F16J15/3424
摘要： In an embodiment, a sliding component includes a plurality of dimples 10 disposed on at least one of sliding surfaces of a pair of sliding parts relatively sliding on each other, the plurality of dimples 10 is provided mutually independently of the other dimples, and the plurality of dimples 10 has an area ratio set lower on the low-pressure fluid side of the sliding surface than on the high-pressure fluid side. On the sliding surface, a liquid film on the high-pressure fluid side is thickened by dynamic pressure effect to improve fluid lubricity, and a liquid film on the low-pressure fluid side is thinned to prevent leakage.
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公开(公告)号：US20180005716A1
公开(公告)日：2018-01-04
申请号：US15373495
申请日：2016-12-09
申请人： China Nuclear Power Engineering Co., Ltd. , Shenyang Blower Group Nuclear Power Pumps Co., Ltd , China General Nuclear Power Group
发明人： Xingjiang Chen , Zhiyuan Luo , Yuangang Duan , Zhongshuang Li , Wei Fu , Guohui Cong , Zhao Chen , Xiaowu Song , Yanzhang Liu , Xueling Wang , Jiajiong Ma , Yixun Zhang
CPC分类号： G21D1/04 , F04D7/08 , F04D29/10 , F04D29/106 , F04D29/588 , F16J15/16 , F16J15/34 , G21C15/243 , G21D1/02 , Y02E30/40
摘要： A main pump shaft seal water injection system of a nuclear power plant includes a jet pump, a high pressure cooler, a hydrocyclone, valves and a main connection pipeline outside of a main pump, and an auxiliary pump and an internal flow path inside the main pump. Inner and outer flow paths of the main pump are connected with a shaft seal water injection hole and a high temperature water drainage hole. The main connection pipeline is connected between an upper filling water pipeline and a shaft seal water injection hole. A bypass pipeline connected with the jet pump, the high pressure cooler and the hydrocyclone, the main connection pipeline is provided with a normally open main pipeline isolating valve. The bypass pipeline allows low temperature upper filling water in the RCV system to enter the shaft seal water injection hole of the main flange directly.
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公开(公告)号：US20170314682A1
公开(公告)日：2017-11-02
申请号：US15650034
申请日：2017-07-14
申请人： DRESSER-RAND COMPANY
CPC分类号： F16J15/164 , F16J15/16 , F16J15/34
摘要： A seal assembly is disclosed that can be used to seal a bearing case in a turbine. The seal assembly has an annular seal plate seated within a groove defined in the bearing case and radially-offset from the turbine shaft. A seal retainer is mounted on the shaft axially-offset from the annular seal plate and defines a channel therein for receiving and seating a seal therein. The seal has a flexible lip that extends from the body of the seal and engages either the inside surface of the bearing case or a counterface of the annular seal plate, thereby preventing or substantially restricting the influx of contaminants into the bearing case.
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公开(公告)号：US09777840B2
公开(公告)日：2017-10-03
申请号：US14403529
申请日：2013-09-26
发明人： Yuichiro Tokunaga
CPC分类号： F16J15/34 , F16J15/3412 , F16J15/348 , F16J15/40
摘要： A sliding component is characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, where the cavitation formation area on the upstream side of each dimple is positioned closer to the low-pressure fluid side and the positive-pressure generation area on the downstream side is positioned closer to the high-pressure fluid side, and the fluid that has been suctioned in the cavitation formation area of each of the above dimples travels in the dimple and is returned to the high-pressure fluid side from the positive-pressure generation area.
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公开(公告)号：US09765892B2
公开(公告)日：2017-09-19
申请号：US15121665
申请日：2015-06-25
CPC分类号： F16J15/34 , F16J15/3412 , F16J15/40
摘要： A sliding component has a plurality of dimples provided independently in a circumferential direction on one sealing face of a pair of sliding components relatively sliding to each other. A cavitation formation region on an upstream side of each dimple is disposed closer to a low-pressure fluid side and a positive pressure generation region on a downstream side of each dimple is disposed closer to a high-pressure fluid side, and an edge on the low-pressure fluid side of the positive pressure generation region is formed into a tapered shape inclined with respect to the rotating direction of the other sealing face toward the high-pressure fluid side from the low-pressure fluid side and is smoothly connected to an edge on the low-pressure fluid side of the cavitation formation region.
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公开(公告)号：US09695944B2
公开(公告)日：2017-07-04
申请号：US14560446
申请日：2014-12-04
发明人： John Davis
CPC分类号： F16J15/3496 , C23C16/06 , C23C16/32 , F16J15/34 , F16J15/3412 , F16J15/3424
摘要： An improved mechanical face seal is provided which includes a pair of relatively rotatable seal rings having opposing seal faces. At least one of the seal faces and preferably the silicon carbide seal ring includes a tantalum coating over the seal face. The coating is formed such that the exposed seal face surface is formed of tantalum with a preferred thickness, and the substrate is the silicon carbide seal ring material. Between the silicon carbide substrate and exposed tantalum coating layer, an intermediate transformation layer of tantalum carbide is formed to enhance bonding of the substrate and coating layer. Preferably, the tantalum carbide layer is formed during the coating process wherein the tantalum is applied by chemical vapor deposition and the tantalum reacts with the silicon carbide to form the tantalum carbide at the interface between the tantalum coating layer and the seal ring substrate.
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公开(公告)号：US09695940B2
公开(公告)日：2017-07-04
申请号：US14132571
申请日：2013-12-18
CPC分类号： F16J15/34 , F16J15/40 , F16J15/442
摘要： A circumferential shaft seal segment includes a radial outer face, a radially inner face, a first axial face extending from the radial outer face to the radial inner face and a second axial face axially spaced from the first axial face and extending from the radially outer face to the radially inner face. The seal has a bleed slot in the radially inner face extending from the first axial face toward the second axial face, and there are first and second recesses in the radially inner face in communication with the bleed slot that extend from circumferentially opposite sides of the bleed slot.
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公开(公告)号：US09631725B2
公开(公告)日：2017-04-25
申请号：US14707324
申请日：2015-05-08
CPC分类号： F16J15/00 , F16J15/002 , F16J15/34 , F16J15/3404 , F16J15/36 , F16J15/40
摘要： Seal sections for electric submersible pumps. Seal sections are described which include a combination of a barrier fluid to protect a seal from unfavorable ingress and control of differential pressure across the face of the seal.
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19.发明授权公开(公告)号：US09617995B2
公开(公告)日：2017-04-11
申请号：US14453334
申请日：2014-08-06
发明人： Stefan Weigl , Reinhard Denk , Hisham Kamal , Josef Strassl , Robert Kurz , Bernhard Murrenhoff , Thomas Boehme , Gunther Herr , Franz Kneidl , Mikael Tekneyan , Matthias Gradl , Erwin Weber , Roger Willis , Stefan Kern , Johann Kreidl , Marcel Verhoeven , Thomas Schmitt
CPC分类号： F04C15/0023 , F04C2/126 , F04C15/0038 , F16J15/34 , F16J15/3488 , F16J15/36
摘要： A rotary piston pump with at least two double- or multi-lobe rotary pistons rotating in opposite directions, the drive shafts whereof include seals, wherein the seals are constituted as slip ring seals or lip seals or stuffing-box seals, which in each case are disposed on the shaft shoulder belonging to the respective rotary piston, and one slip ring per seal is provided with a locking device, which includes a large number of fixing positions. The seals are pushed onto a tubular shoulder of the rotary piston, the rotary piston is introduced into the pump housing, the securing element is connected to the slip ring seal in a form-fit manner by rotation of the rotary piston and the shaft shoulder is then rigidly connected to the drive shaft.
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公开(公告)号：US09568108B2
公开(公告)日：2017-02-14
申请号：US14696892
申请日：2015-04-27
发明人： Hidekazu Takahashi
CPC分类号： F16J15/363 , F16J15/34 , F16J15/348 , F16J15/3496 , F16J15/36
摘要： A bellows type mechanical seal including a sealing ring and a mating ring, wherein either one of the sealing ring or the mating ring is retained in a housing and the other one is mounted on a shaft and wherein the sealing ring is supported by a bellows and the bellows has a retainer welded thereto on one of the sides for retaining the sealing ring and a collar welded on the other side to form a bellows assembly, is characterized in that the entire surface of the bellows assembly is covered by an erosion-resistant film formed by the physical vapor deposition, such as ion-plating.
摘要翻译： 一种波纹管式机械密封，其包括密封环和配合环，其中密封环或配合环中的任一个保持在壳体中，另一个安装在轴上，并且其中密封环由波纹管支撑， 波纹管具有在其一侧焊接在其上的保持器，用于保持密封环和在另一侧焊接以形成波纹管组件的套环，其特征在于，波纹管组件的整个表面被抗侵蚀膜覆盖 通过物理气相沉积形成，如离子镀。
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