公开(公告)号：US06413040B1

公开(公告)日：2002-07-02

申请号：US09593276

申请日：2000-06-13

申请人： Yufeng Phillip Yu ,  Gary Michael Itzel ,  Waylon Willard Webbon ,  Radhakrishna Bagepalli ,  Steven Sebastian Burdgick ,  Iain Robertson Kellock

发明人： Yufeng Phillip Yu ,  Gary Michael Itzel ,  Waylon Willard Webbon ,  Radhakrishna Bagepalli ,  Steven Sebastian Burdgick ,  Iain Robertson Kellock

IPC分类号： F01D514

CPC分类号： F01D9/065 ,  F05D2240/81

摘要： A gas turbine nozzle segment has outer and inner band portions. Each band portion includes a nozzle wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through the apertures of the impingement plate to cool the nozzle wall. Structural pedestals interconnect the cover and nozzle wall and pass through holes in the impingement plate to reduce localized stress otherwise resulting from a difference in pressure within the chamber of the nozzle segment and the hot gas path and the fixed turbine casing surrounding the nozzle stage. The pedestals may be cast or welded to the cover and nozzle wall.

摘要翻译： 燃气轮机喷嘴段具有外带部分和内带部分。 每个带部分包括喷嘴壁，盖和在盖和喷嘴壁之间的冲击板，其在冲击板的相对侧上限定两个空腔。 冷却蒸汽被供应到一个空腔以流过冲击板的孔以冷却喷嘴壁。 结构基座将盖和喷嘴壁互连并穿过冲击板中的孔，以减少局部应力，否则由于喷嘴段和热气路径以及围绕喷嘴级的固定涡轮壳体之间的压力差导致。 基座可以铸造或焊接到盖和喷嘴壁。

公开(公告)号：US06435814B1

公开(公告)日：2002-08-20

申请号：US09571813

申请日：2000-05-16

申请人： Yufeng Phillip Yu ,  Gary Michael Itzel ,  Sarah Jane Osgood ,  Radhakrishna Bagepalli ,  Waylon Willard Webbon ,  Steven Sebastian Burdgick

发明人： Yufeng Phillip Yu ,  Gary Michael Itzel ,  Sarah Jane Osgood ,  Radhakrishna Bagepalli ,  Waylon Willard Webbon ,  Steven Sebastian Burdgick

IPC分类号： F01D904

CPC分类号： F02C7/18 ,  F01D5/189 ,  F05D2240/12 ,  F05D2240/81 ,  F05D2260/201 ,  F05D2260/205 ,  F05D2260/2212 ,  F05D2260/2322

摘要： Turbine stator vane segments have radially inner and outer walls with vanes extending between them. The inner and outer walls are compartmentalized and have impingement plates. Steam flowing into the outer wall plenum passes through the impingement plate for impingement cooling of the outer wall upper surface. The spent impingement steam flows into cavities of the vane having inserts for impingement cooling the walls of the vane. The steam passes into the inner wall and through the impingement plate for impingement cooling of the inner wall surface and for return through return cavities having inserts for impingement cooling of the vane surfaces. To provide for air film cooing of select portions of the airfoil outer surface, at least one air pocket is defined on a wall of at least one of the cavities. Each air pocket is substantially closed with respect to the cooling medium in the cavity and cooling air pumped to the air pocket flows through outlet apertures in the wall of the airfoil to cool the same.

摘要翻译： 涡轮机定子叶片段具有径向的内壁和外壁，叶片在它们之间延伸。 内壁和外壁分隔开并具有冲击板。 流入外壁集气室的蒸汽通过冲击板，用于外壁上表面的冲击冷却。 废冲击蒸汽流入具有用于冲击冷却叶片壁的插入件的叶片的空腔中。 蒸汽进入内壁并通过冲击板，用于内壁表面的冲击冷却，并通过具有用于叶片表面的冲击冷却的插入件的返回腔返回。 为了提供翼型件外表面的选定部分的空气膜冷却，至少一个气穴限定在至少一个空腔的壁上。 每个空气袋相对于空腔中的冷却介质基本封闭，并且泵送到空气袋的冷却空气流过翼型件的壁中的出口孔以使其冷却。