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公开(公告)号：US10990712B2
公开(公告)日：2021-04-27
申请号：US16067666
申请日：2017-01-16
发明人： Makoto Iwasaki , Kazuo Hirota , Shingo Nishida , Tetsuya Arikawa , Ryoichi Kawakami , Masaaki Katayama , Toshifumi Nariai , Kohei Yamamoto
IPC分类号： G06F17/50 , G06F17/18 , G06F30/17 , G06F30/13 , G06F30/20 , G21D1/00 , G06F113/14 , G21D1/02
摘要： There is provided a contact force evaluation method for evaluating a contact force against a supporting member of a tube bundle positioned in a fluid and supported by the supporting member, including a contact force setting step of setting a contact force of the tube bundle, a probability density function calculation step of calculating a probability density function of a reaction force received by the supporting member from the tube bundle in response to a predetermined input, using a vibration analysis model of the tube bundle and the supporting member, a probability calculation step of calculating a probability that a reaction force equal to or higher than the set contact force occurs, based on the calculated probability density function, and an evaluation step of evaluating the set contact force, based on the calculated probability.
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公开(公告)号：US20190293482A1
公开(公告)日：2019-09-26
申请号：US16304413
申请日：2017-07-10
发明人： Shingo Nishida , Makoto Iwasaki , Kazuo Hirota , Ryoichi Kawakami
摘要： A self-excited vibration evaluation method for evaluating self-excited vibration of a tube bundle arranged in a fluid so as to be supported by a support member includes: for each of at least one eigenmode of the tube bundle, a time history response analysis step of performing time history response analysis of simulating a change in vibration amplitude of the tube bundle, while changing a negative damping ratio corresponding to an excitation force of the fluid; calculating a critical flow velocity of the fluid on the basis of a minimum negative damping ratio at which the change of the vibration amplitude of the tube bundle diverges in the time history response analysis; inputting an expected flow velocity of the fluid; and evaluating the self-excited vibration of the tube bundle for each eigenmode by comparing the expected flow velocity of the fluid with the critical flow velocity.
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3.发明申请公开(公告)号：US20150219332A1
公开(公告)日：2015-08-06
申请号：US14421218
申请日：2013-08-23
发明人： Tomohito Nakamori , Yoshitsugu Nekomoto , Jun Hirai , Toshihiro Kojima , Akihisa Iwasaki , Hideyuki Morita , Kazuo Hirota , Kengo Shimamura , Takaya Kusakabe , Ryoichi Kawakami , Katsuyoshi Nishioka
CPC分类号： F22B37/206 , F16L55/0331 , F22B37/10 , F22B37/18 , F28D1/0475 , F28D7/06 , F28F9/013 , F28F2225/04 , F28F2265/30 , G21D1/006 , Y02E30/40
摘要： A heat exchanger tube vibration suppression device and a steam generator are provided. The heat exchanger tube vibration suppression device includes: a plurality of sleeves disposed in a heat exchanger tube with a predetermined gap in relation to an inner surface of the heat exchanger tube so as to extend in a longitudinal direction of the heat exchanger tube; and a connecting member that connects the plurality of sleeves so as to be movable between a contracted position at which adjacent sleeves overlap at least partially and an extended position at which the amount of overlap of the adjacent sleeves is minimized. In this way, it is possible to suppress the vibration of the heat exchanger tube appropriately.
摘要翻译： 提供了一种热交换器管振动抑制装置和蒸汽发生器。 所述热交换器管振动抑制装置包括：多个套筒，其布置在热交换器管中，所述多个套筒相对于所述热交换器管的内表面具有预定的间隙，以沿所述热交换器管的纵向方向延伸; 以及连接构件，其连接所述多个套筒，以便能够在相邻套筒至少部分地重叠的收缩位置和相邻套筒的重叠量最小化的延伸位置之间移动。 以这种方式，可以适当地抑制热交换器管的振动。
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公开(公告)号：US10935232B2
公开(公告)日：2021-03-02
申请号：US16309616
申请日：2017-07-21
发明人： Masaaki Katayama , Masatsugu Monde , Kazuo Hirota , Naoki Ono
摘要： A vibration damping structure for a heat-transfer tube bundle including columns arranged at an interval and each composed of a plurality of heat-transfer tubes curved in a common plane and arranged in parallel to each other. The vibration damping structure includes a first vibration damping member and a second vibration damping member disposed between the columns so as to intersect the array direction of the columns. The first vibration damping member and the second vibration damping member are disposed at different positions in an axial direction of each heat-transfer tube, and thicknesses of the first vibration damping member and the second vibration damping member in the array direction are larger than an average value of a clearance between the columns under operation.
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公开(公告)号：US10654329B2
公开(公告)日：2020-05-19
申请号：US16167105
申请日：2018-10-22
摘要： An amphibious vehicle includes a vehicle body; a flap supported at a lower portion in a traveling direction of the vehicle body to be able to swing in a direction in which an upper edge portion approaches and separates from the vehicle body; a support column which has a fluid actuator capable of expanding and contracting in accordance with a pressure of a working fluid to a cylinder chamber, is connected to the flap in at least a first end portion in a longitudinal direction, and performs adjustment of a swinging angle of the flap by expansion and contraction of the fluid actuator; a power source which supplies the working fluid to the cylinder chamber; and a safety valve which communicates with the cylinder chamber, and opens when an internal pressure of the cylinder chamber becomes greater than a predetermined pressure to discharge the working fluid in the cylinder chamber.
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公开(公告)号：US11462335B2
公开(公告)日：2022-10-04
申请号：US16617134
申请日：2018-01-30
发明人： Shingo Nishida , Kazuo Hirota , Ryoichi Kawakami
IPC分类号： G21C17/017 , F22B37/24 , F28D7/06 , F28F9/013 , F28F27/00 , G01N29/04 , G01N29/11 , F28D21/00 , G01M7/02
摘要： A supporting force inspection device for inspecting a supporting force of a vibration suppression member interposed between bend portions of a plurality of heat transfer tubes of a steam generator includes: an acceleration sensor for detecting a vibration state of the bend portion; a sensor holding part disposed inside the heat transfer tube and configured to hold the acceleration sensor; and a vibration force generation part configured to generate a vibration force for vibrating the heat transfer tube along a plane in which a curvature circle of the bend portion exists. The vibration force generation part is configured to cooperate with the sensor holding part and vibrate the heat transfer tube along the plane in which the curvature circle exists.
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公开(公告)号：US20190309940A1
公开(公告)日：2019-10-10
申请号：US16309616
申请日：2017-07-21
发明人： Masaaki Katayama , Masatsugu Monde , Kazuo Hirota , Naoki Ono
IPC分类号： F22B37/20 , F16F3/02 , F16F15/073 , F28D7/06
摘要： The preset application relates to a vibration damping structure for a heat-transfer tube bundle including columns arranged at an interval and each composed of a plurality of heat-transfer tubes curved in a common plane and arranged in parallel to each other. The vibration damping structure includes a first vibration damping member and a second vibration damping member disposed between the columns so as to intersect the array direction of the columns. The first vibration damping member and the second vibration damping member are disposed at different positions in an axial direction of each heat-transfer tube, and thicknesses of the first vibration damping member and the second vibration damping member in the array direction are larger than an average value of a clearance between the columns under operation.
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公开(公告)号：US20190018921A1
公开(公告)日：2019-01-17
申请号：US16067666
申请日：2017-01-16
发明人： Makoto Iwasaki , Kazuo Hirota , Shingo Nishida , Tetsuya Arikawa , Ryoichi Kawakami , Masaaki Katayama , Toshifumi Nariai , Kohei Yamamoto
摘要： There is provided a contact force evaluation method for evaluating a contact force against a supporting member of a tube bundle positioned in a fluid and supported by the supporting member, including a contact force setting step of setting a contact force of the tube bundle, a probability density function calculation step of calculating a probability density function of a reaction force received by the supporting member from the tube bundle in response to a predetermined input, using a vibration analysis model of the tube bundle and the supporting member, a probability calculation step of calculating a probability that a reaction force equal to or higher than the set contact force occurs, based on the calculated probability density function, and an evaluation step of evaluating the set contact force, based on the calculated probability.
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9.发明申请公开(公告)号：US20140053555A1
公开(公告)日：2014-02-27
申请号：US13974864
申请日：2013-08-23
发明人： Hideyuki Morita , Kazuo Hirota , Ryoichi Kawakami , Shingo Nishida , Kengo Shimamura , Takaya Kusakabe
IPC分类号： B23P15/26
CPC分类号： B23P15/26 , F22B37/005 , F28F11/04 , F28F2265/30 , Y10T29/49352 , Y10T29/53113
摘要： A heat transfer tube repairing apparatus including a wire that is flexible and is insertable into a heat transfer tube, a sleeve that is fixed to a predetermined position in the longitudinal direction of the wire, a pair of pressing members that is provided at the front and rear sides of the sleeve in the longitudinal direction of the wire and is able to press the inner surface of the heat transfer tube, and operation members that are able to move the pressing members between a pressing position where the pressing members press the inner surface of the heat transfer tube and a separating position where the pressing members are separated from the inner surface of the heat transfer tube.
摘要翻译： 一种传热管修复装置，其特征在于，包括柔性且可插入传热管的导线，固定在所述导线的长度方向上的预定位置的套筒，设置在前方的一对按压部件， 套筒的纵向方向上的后侧能够按压传热管的内表面，并且能够使按压部件在按压部件按压内侧面的按压位置之间移动的操作部件 所述传热管和所述按压部件与所述传热管的内表面分离的分离位置。
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公开(公告)号：US20240344631A1
公开(公告)日：2024-10-17
申请号：US18293080
申请日：2022-12-13
发明人： Shingo Nishida , Kazuo Hirota , Fumiyuki Suzuki , Masaki Hata
CPC分类号： F16K39/024 , F16K1/443
摘要： A measurement method for a steam valve according to at least one embodiment of the present disclosure, includes: a step of measuring acceleration of a valve stem when a slave valve is opened by driving the valve stem with an actuator from a fully closed state of a master valve and the slave valve; a step of detecting a timing at which the slave valve is fully opened, based on the measured acceleration of the valve stem; and a step of calculating an amount of movement of the valve stem from a reference position to a position where the slave valve is fully opened.
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