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公开(公告)号：US10808728B2
公开(公告)日：2020-10-20
申请号：US16176842
申请日：2018-10-31
Inventor： Shinichiro Tokuyama
Abstract: A multistage centrifugal compressor includes a casing, a rotor including a plurality of impellers, a diaphragm defining a gas flow path that includes a return flow path, and at least one liquid injection device configured to inject liquid into the gas flow path. The liquid injection device includes a liquid injection path, an internal path, a chamber, and a plurality of nozzles. The liquid injection path penetrates through the casing at a position corresponding to a return bend. The internal path receives a liquid supply pipe inserted from the liquid injection path through the return bend. The chamber is provided in the diaphragm along a circumferential direction and the liquid is introduced into the chamber through the internal path. The plurality of nozzles inject the liquid introduced into the chamber, to the gas flow path from different positions of the chamber in the circumferential direction.
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公开(公告)号：US20200309150A1
公开(公告)日：2020-10-01
申请号：US16822470
申请日：2020-03-18
Inventor： Shuichi Yamashita , Jo Masutani , Chihiro Myoren , Shinichiro Tokuyama , Yuta Okumura
Abstract: A compressor includes a rotation shaft that is capable of rotating around a main axis, an impeller provided integrally with the rotation shaft, a casing that covers the impeller from an outer circumferential side and forms a flow path through which a working fluid circulates, a discharge scroll that is provided at an end of the flow path on a downstream side and extends in a spiral shape around the main axis, a discharge nozzle that communicates with the discharge scroll on the downstream side and extends from the discharge scroll in a tangent direction around the main axis, and a pressure loss body that has a plate shape extending in a direction orthogonal to an axis of the discharge nozzle extending in a radial direction orthogonal to the main axis and is capable of blocking a part of a flow path cross-section of the discharge nozzle.
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公开(公告)号：US11873822B2
公开(公告)日：2024-01-16
申请号：US18161281
申请日：2023-01-30
Inventor： Akihiro Nakaniwa , Jo Masutani , Shinichiro Tokuyama , Yoshiaki Shoji
CPC classification number: F04D17/122 , F04D29/4206 , F04D29/444
Abstract: A centrifugal compressor includes a rotary shaft having a plurality of impellers and a casing having an intermediate discharge port. The casing has a plurality of diaphragms, an external casing, a return flow path that guides a flow direction of a working fluid to an inner side in a radial direction, and an intermediate scroll that guides part of the working fluid discharged from the impeller in an intermediate stage to the intermediate discharge port. The intermediate scroll has a scroll flow path formed on a second side in the axial direction with respect to the return flow path, and an introduction portion connecting the return flow path and the scroll flow path, and an outer flow path forming surface of the scroll flow path is formed by a casing inner peripheral surface facing an inner side of the external casing in the radial direction.
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公开(公告)号：US10989201B2
公开(公告)日：2021-04-27
申请号：US16088352
申请日：2017-03-23
Inventor： Shuichi Yamashita , Akihiro Nakaniwa , Ryosuke Saito , Shinichiro Tokuyama
Abstract: A centrifugal compressor includes: a rotating shaft; a first impeller; a second impeller which is disposed on a downstream side of the first impeller; a return flow path which guides a first fluid flowing to a radially outer side from the first impeller toward a radially inner side; an introduction flow path which introduces the fluid guided to the radially inner side to the second impeller; an intermediate suction flow path which additionally supplies a second fluid to the second impeller; and a curved flow path which is connected to a downstream side of the introduction flow path and the intermediate suction flow path, and guides the first fluid and the second fluid to the second impeller, wherein a side surface on an upstream side of the introduction flow path is disposed on the downstream side from a return position of the return flow path.
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公开(公告)号：US20190101133A1
公开(公告)日：2019-04-04
申请号：US16087427
申请日：2017-03-06
Inventor： Noriyuki Okada , Eiichi Yanagisawa , Kazutoshi Yoko , Yuji Masuda , Shinichiro Tokuyama
Abstract: A centrifugal compressor that includes a rotor including a shaft rotatably supported in a casing and an impeller secured to an outer periphery of the shaft; a diaphragm surrounding the impeller from an outer peripheral side; a suction side casing head disposed so as to be spaced apart from the diaphragm on a side where a fluid is suctioned; a temperature adjusting mechanism that is provided in the suction side casing head and configured to adjust a temperature of environment by flow of a heat medium; a heat shield that is provided between the suction side casing head and the diaphragm and defines, together with the impeller, a suction flow path through which the fluid is introduced to the impeller; and a plurality of straightening vanes that are provided in the suction flow path and configured to straighten the fluid flowing through the suction flow path.
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Patent Agency Ranking
公开(公告)号：US10066750B2
公开(公告)日：2018-09-04
申请号：US14433240
申请日：2013-10-09
Inventor： Akihiro Nakaniwa , Shinichiro Tokuyama
IPC: F16J15/44 , F01D11/02 , F04D29/10 , F16J15/447
CPC classification number: F16J15/447 , F01D11/02 , F04D29/102 , F05D2250/191 , F05D2250/283 , F16J15/444 , F16J15/4472
Abstract: A rotary machine includes a casing that is disposed on the outer circumference side of a rotating shaft and rotates about the axis relative to the rotating shaft, and a hole pattern seal that is fixed to the casing, divides a space between the rotating shaft and the casing into a high pressure side and a low pressure side, and has a first hole line on which a plurality of first hole portions are formed at intervals in a circumferential direction so as to face an outer circumferential surface of the rotating shaft. The hole pattern seal has fin portions that extend toward the rotating shaft at the high-pressure side of the first hole line and in the circumferential direction. The rotating shaft includes a convex portion that protrude from the outer circumferential surface of the rotating shaft toward the first hole portions to extend in the circumferential direction, and face the first hole portions at the low pressure side of the fin portion. The convex portion has a wall surface facing the fin portions.
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公开(公告)号：US20180119569A1
公开(公告)日：2018-05-03
申请号：US15561913
申请日：2015-03-31
Inventor： Yuji Masuda , Shinichiro Tokuyama
Abstract: A method for inspecting a rotary machine having a fluid flow path includes a step of connecting an observation device to a connection port having an open/close valve that opens/closes a communication hole that communicates with the outside of the rotary machine and the flow path, the main body being connected to the connection port where the open/close valve is closed; a step of opening the open/close valve and inserting an insertion rod protruding from the main body of the observation device into the communication hole; a step of observing the inside of the flow path by an observation optical system provided at a leading end portion of the insertion rod; a step of withdrawing the insertion rod from the communication hole and closing the open/close valve; and a step of detaching the main body of the observation device from the connection port.
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公开(公告)号：US20180073513A1
公开(公告)日：2018-03-15
申请号：US15562076
申请日：2015-03-31
Inventor： Yuji Masuda , Shinichiro Tokuyama
CPC classification number: F04D27/001 , F04B51/00 , F04D17/122 , F04D29/08 , F04D29/70 , F04D29/701 , F05D2260/607
Abstract: A method for inspecting a rotary machine having a flow path through which a fluid flows includes a step of measuring a width of the flow path by a non-contact sensor in a stationary component of the rotary machine at a position facing the flow path; and a step of determining whether or not the measured width of the flow path is less than a predetermined lower limit threshold.
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公开(公告)号：US20150267710A1
公开(公告)日：2015-09-24
申请号：US14435813
申请日：2013-08-29
Inventor： Naoyuki Nagai , Satoshi Saburi , Takashi Sato , Daisuke Kiuchi , Shinichiro Tokuyama
IPC: F04D29/10 , F04D29/056
CPC classification number: F04D29/102 , F04D17/122 , F04D29/056 , F04D29/057 , F04D29/122 , F05D2300/612 , F16J15/444
Abstract: Provided is a seal device configured to prevent leakage of a fluid on an outer circumferential surface of a rotary shaft in a direction along an axis of the rotary shaft. The seal device includes an annular main body section disposed in a circumferential direction of the rotary shaft, and a plurality of at least two kinds of holes formed in an inner circumferential surface of the main body section opening and facing to the outer circumferential surface of the rotary shaft, and having different depths.
Abstract translation: 提供一种密封装置，其构造成防止沿着旋转轴的轴线的方向在旋转轴的外周面上的流体泄漏。 密封装置包括沿旋转轴的圆周方向设置的环形主体部分，以及形成在主体部分开口的内周面中并且面向主体部分的外周表面的多个至少两个孔 旋转轴，并具有不同的深度。
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公开(公告)号：US10684234B2
公开(公告)日：2020-06-16
申请号：US15561913
申请日：2015-03-31
Inventor： Yuji Masuda , Shinichiro Tokuyama
IPC: G02B23/24 , G01N21/954 , F04B51/00 , B08B9/00 , F04D17/12 , F04D27/00 , B08B9/032 , F01D21/00 , F01D25/00
Abstract: A method for inspecting a rotary machine having a fluid flow path includes a step of connecting an observation device to a connection port having an open/close valve that opens/closes a communication hole that communicates with the outside of the rotary machine and the flow path, the main body being connected to the connection port where the open/close valve is closed; a step of opening the open/close valve and inserting an insertion rod protruding from the main body of the observation device into the communication hole; a step of observing the inside of the flow path by an observation optical system provided at a leading end portion of the insertion rod; a step of withdrawing the insertion rod from the communication hole and closing the open/close valve; and a step of detaching the main body of the observation device from the connection port.
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