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    • 97. 发明公开
    • Gas turbine of the axial flow type
    • 轴流式燃气轮机
    • EP2458159A1
    • 2012-05-30
    • EP11190892.7
    • 2011-11-28
    • Alstom Technology Ltd
    • Khanin, Alexander AnatolievichKostege, Valery
    • F01D11/10
    • F01D11/10F05D2240/11F05D2240/81F05D2260/201F05D2260/205
    • The invention relates to a gas turbine (30) of the axial flow type, comprising a rotor with alternating rows of air-cooled blades (32) and rotor heat shields, and a stator with alternating rows of air-cooled vanes (31) and stator heat shields (36) mounted on a vane carrier (40), whereby the stator coaxially surrounds the rotor to define a hot gas path (39) in between, such that the rows of blades (32) and stator heat shields (36), and the rows of vanes (31) and rotor heat shields are opposite to each other, respectively, and a row of vanes (31) and the next row of blades (32) in the downstream direction define a turbine stage (TS), and whereby the blades (32) are provided with outer blade platforms (34) at their tips.
      A reduction in cooling air mass flow and leakage in combination with an improved cooling and effective thermal protection of critical parts within the turbine stages of the turbine is achieved by providing within a turbine stage (TS) means (43-48) to direct cooling air that has already been used to cool, especially the airfoils of the vanes (31) of the turbine stage (TS), into a first cavity (41) located between the outer blade platforms (34) and the opposed stator heat shields (36) for protecting the stator heat shields (36) against the hot gas and for cooling the outer blade platforms (34).
    • 本发明涉及一种轴流式燃气轮机(30),其包括具有交替排空气冷却叶片(32)和转子隔热罩的转子,以及具有交替行空气冷却叶片(31)和 (40)上的定子隔热罩(36),其中定子同轴地围绕转子以在其间限定热气体路径(39),使得成排的叶片(32)和定子隔热罩(36) ,并且叶片排(31)和转子隔热罩分别彼此相对,并且在下游方向上的一排叶片(31)和下一排叶片(32)限定涡轮机级(TS),其中, 并且由此叶片(32)在其尖端处设置有外叶片平台(34)。 通过在涡轮机级(TS)装置(43-48)内提供冷却空气质量流量和泄漏的减少以及对涡轮机的涡轮机级内的关键部件的改进的冷却和有效的热保护, 已经用于冷却尤其是涡轮机级(TS)的叶片(31)的翼型件进入位于外叶片平台(34)和相对的定子隔热罩(36)之间的第一腔室(41) 用于保护定子隔热罩(36)抵抗热气体并用于冷却外部叶片平台(34)。
    • 98. 发明公开
    • Gas turbine of the axial flow type
    • 轴流式燃气轮机
    • EP2458152A2
    • 2012-05-30
    • EP11190902.4
    • 2011-11-28
    • Alstom Technology Ltd
    • Khanin, Alexander Anatolievich
    • F01D5/20F01D11/10F01D25/24
    • F01D5/225F01D11/10F01D11/12F01D25/246F05D2240/11F05D2240/81F05D2260/205F05D2300/5021
    • A gas turbine (30) of the axial flow type comprises a rotor with alternating rows of air-cooled blades (20) and rotor heat shields, and a stator with alternating rows of air-cooled vanes (21) and stator heat shields (27) mounted on inner rings (26), whereby the stator coaxially surrounds the rotor to define a hot gas path (22) in between, such that the rows of blades (20) and stator heat shields (27), and the rows of vanes (21) and rotor heat shields are opposite to each other, respectively, and a row of vanes (21) and the next row of blades (20) in the downstream direction define a turbine stage (TS), and whereby the blades (20) are provided with outer blade platforms (45) at their tips.
      An efficient cooling and long life-time is achieved by providing outer blade platforms (45), which comprise on their outside a plurality of teeth (46a-c) running parallel to each other in the circumferential direction and being arranged one after the other in the direction of the hot gas flow, whereby said teeth (46a-c) are divided into first and second teeth (46a; 46b-c), the second teeth (46b-c) being located downstream of the first teeth (46a), the first teeth (46a) are opposite to a downstream projection (33) of the adjacent vanes (21) of the turbine stage (TS), and the second teeth (46b-c) are opposite to the respective stator heat shields (27).
    • 轴流类型的燃气轮机(30)包括具有交替排空气冷却叶片(20)和转子隔热罩的转子,以及具有交替排空气冷却叶片(21)和定子隔热罩(27)的定子 )安装在内环(26)上,由此定子同轴地围绕转子以在其之间限定热气体路径(22),使得叶片排(20)和定子隔热罩(27)以及叶片排 (21)和转子隔热罩分别彼此相对,并且在下游方向上的一排叶片(21)和下一排叶片(20)限定涡轮机级(TS),并且其中叶片(20) )在它们的尖端处设有外部叶片平台(45)。 通过提供外叶片平台(45)来实现有效的冷却和长的使用寿命,所述外叶片平台(45)在其外侧上包括多个在圆周方向上彼此平行延伸的齿(46a-c)并且一个接一个地依次布置 (46a-c)被分成第一和第二齿(46a; 46b-c),第二齿(46b-c)位于第一齿(46a)的下游, 第一齿46a与涡轮机级TS的相邻叶片21的下游突出部33相对,并且第二齿46b-c与相应的定子隔热罩27相对, 。