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公开(公告)号：US10145248B2
公开(公告)日：2018-12-04
申请号：US14548341
申请日：2014-11-20
发明人： Susumu Nakano , Koji Ishibashi , Shunsuke Mizumi , Masaki Matsuda , Takeshi Kudo
摘要： A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
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公开(公告)号：US10132178B2
公开(公告)日：2018-11-20
申请号：US14968272
申请日：2015-12-14
发明人： Koji Ishibashi , Susumu Nakano , Takeshi Kudo
摘要： To provide a steam turbine stationary blade adapted to remove a liquid film effectively. A steam turbine stationary blade with a hollow region therein, the steam turbine stationary blade includes a plurality of slots and arranged in lines in a direction of a chord length, the plurality of slots communicate with a working fluid flow passageway and with the hollow region, and extends in a direction of a blade length, and at least one connecting portion disposed so that for each of the most downstream slot of the plurality of slots and, a surface directed toward the working fluid flow passageway is positioned closer to the hollow region than to a surface of the steam turbine stationary blade, and so that the connecting portion connects both sidewall surfaces of each of the most downstream slots, in the direction of the chord length.
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公开(公告)号：US09745866B2
公开(公告)日：2017-08-29
申请号：US14448462
申请日：2014-07-31
发明人： Susumu Nakano , Koji Ishibashi , Kenjiro Narita , Takeshi Kudo
CPC分类号： F01D25/32 , F01D5/14 , F01D9/02 , F01D9/041 , F05D2220/31 , F05D2260/609
摘要： A steam turbine stationary blade is configured to be a stationary blade structure having a hollow structure. The steam turbine stationary blade is provided with a slit disposed on a stationary blade surface. The pressure of a stationary blade hollow is reduced to suction a liquid film through the slit for removing the liquid film formed on the stationary blade surface. An opening portion of the slit is covered with a sheet in a meshed pattern formed of a fine mesh thereby reducing an accompanied steam amount so as to effectively remove the liquid film.
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公开(公告)号：US09598964B2
公开(公告)日：2017-03-21
申请号：US14019755
申请日：2013-09-06
发明人： Koji Ishibashi , Susumu Nakano , Shunsuke Mizumi , Takeshi Kudo
CPC分类号： F01D5/18 , F01D5/145 , F01D9/041 , F01D25/32 , F05D2220/31 , F05D2240/124 , F05D2240/125 , F05D2240/127 , Y02T50/673 , Y02T50/676
摘要： A plurality of slots with different widths are provided in a plurality of line on a stationary blade surface. More specifically, the steam turbine stationary blade has a hollow nozzle with a penetrating space, which is connected with a diaphragm outer ring or inner ring, and a plurality of suction slots extending radially which are arranged on the blade surface. At a position where a water film deposited to the blade surface is thick, the width of a slot is smaller and at a position where the water film is thin, the width of a slot is larger.
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公开(公告)号：US10794196B2
公开(公告)日：2020-10-06
申请号：US16184078
申请日：2018-11-08
发明人： Susumu Nakano , Koji Ishibashi , Shunsuke Mizumi , Masaki Matsuda , Takeshi Kudo
摘要： A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.
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