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公开(公告)号：US08475125B2
公开(公告)日：2013-07-02
申请号：US12758919
申请日：2010-04-13
IPC分类号： F01D25/30
CPC分类号： F01D5/143 , F01D5/225 , F01D25/30 , F05D2210/42 , F05D2220/31 , F05D2240/127 , Y10T29/49323
摘要： Tip shrouds on last stage buckets for condensing steam turbines may create significant blockage and form a vortex at the wall of the steam guide of the diffuser, causing the steam flow to separate from the wall of the steam guide. Vortex formation reduces the effective flow area for the remaining fluid to diffuse, causing poor recovery. An inward radial depression is provided of a predetermined depth and distance along an outer steam guide, which redirects the tip leakage flows slightly downward, reducing a shroud blockage effect. This deflection assists the main flow in rejoining the steam guide, thereby making the diffuser more effective.
摘要翻译： 用于冷凝蒸汽涡轮机的最后一级铲斗上的尖端罩可能产生明显的堵塞并在扩散器的蒸汽导管的壁处形成涡流，导致蒸汽流与蒸汽导管的壁分离。 漩涡形成减少了剩余流体扩散的有效流动面积，导致恢复不良。 向内的径向凹陷沿着外部蒸汽导管设置有预定的深度和距离，其将尖端泄漏流向稍微向下重定向，从而减少护罩堵塞效应。 该偏转有助于重新连接蒸汽导管的主流，从而使扩散器更有效。
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公开(公告)号：US20130243564A1
公开(公告)日：2013-09-19
申请号：US13419860
申请日：2012-03-14
摘要： An exhaust diffuser for a turbine includes an inlet configured to receive exhaust gas from a last stage bucket of the turbine and an exhaust gas guide surface configured to guide the exhaust gas. A curvature of the guide surface comprises a first angle with respect to an axis of the turbine and a ratio of a guide surface axial length to the active length of the last stage bucket which is between about 0.45 to 0.70. A method of diffusing exhaust of a turbine includes energizing a boundary layer along a curved exhaust flow guide surface of an exhaust diffuser with over tip leakage of a last stage bucket of the turbine.
摘要翻译： 用于涡轮机的排气扩散器包括被配置为接收来自涡轮机的最后级别的排气的入口和被构造成引导废气的废气引导表面的入口。 引导表面的曲率包括相对于涡轮机的轴线的第一角度和引导表面轴向长度与最后一级铲斗的有效长度的比率在约0.45至0.70之间。 一种扩散涡轮机排气的方法包括沿着涡轮机的最后一级铲斗的尖端泄漏使排气扩散器的弯曲排气流引导表面激励边界层。
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公开(公告)号：US20110250064A1
公开(公告)日：2011-10-13
申请号：US12758919
申请日：2010-04-13
CPC分类号： F01D5/143 , F01D5/225 , F01D25/30 , F05D2210/42 , F05D2220/31 , F05D2240/127 , Y10T29/49323
摘要： Tip shrouds on last stage buckets for condensing steam turbines may create significant blockage and form a vortex at the wall of the steam guide of the diffuser, causing the steam flow to separate from the wall of the steam guide. Vortex formation reduces the effective flow area for the remaining fluid to diffuse, causing poor recovery. An inward radial depression is provided of a predetermined depth and distance along an outer steam guide, which redirects the tip leakage flows slightly downward, reducing a shroud blockage effect. This deflection assists the main flow in rejoining the steam guide, thereby making the diffuser more effective.
摘要翻译： 用于冷凝蒸汽涡轮机的最后一级铲斗上的尖端罩可能产生明显的堵塞并在扩散器的蒸汽导管的壁处形成涡流，导致蒸汽流与蒸汽导管的壁分离。 漩涡形成减少了剩余流体扩散的有效流动面积，导致恢复不良。 向内的径向凹陷沿着外部蒸汽导管设置有预定的深度和距离，其将尖端泄漏流向稍微向下重定向，从而减少护罩堵塞效应。 该偏转有助于重新连接蒸汽导管的主流，从而使扩散器更有效。
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公开(公告)号：US09057287B2
公开(公告)日：2015-06-16
申请号：US13221044
申请日：2011-08-30
CPC分类号： F01D25/24 , F01D25/30 , F05D2250/70 , F05D2250/711
摘要： A steam turbine exhaust hood includes an exhaust hood section, and a butterfly plate arranged in the exhaust hood section. The butterfly plate includes a complex curvilinear cross-sectional profile having a first section that extends between a first end portion and a middle portion, and a second section that extends between the middle portion and a second end portion. One of the first and second sections is formed from at least two curvilinear segments including at least one curvilinear segment having a positive curvature and at least one curvilinear segment having a negative curvature.
摘要翻译： 蒸气涡轮机排气罩包括排气罩部分和布置在排气罩部分中的蝶板。 蝴蝶板包括具有在第一端部和中间部分之间延伸的第一部分的复杂曲线横截面轮廓，以及在中间部分和第二端部部分之间延伸的第二部分。 第一和第二部分中的一个由至少两个曲线段形成，包括至少一个具有正曲率的曲线段和至少一个具有负曲率的曲线段。
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公开(公告)号：US20140037439A1
公开(公告)日：2014-02-06
申请号：US13564908
申请日：2012-08-02
IPC分类号： F01D1/02
CPC分类号： F01D25/30 , F05D2250/324
摘要： Various embodiments include a turbomachine exhaust diffuser. In some embodiments, the turbomachine diffuser includes an inlet, an outlet opposing the inlet along a primary axis of the turbomachine diffuser, and a diffuser region between the inlet and the outlet. The diffuser region can include: a radially outer wall and a radially inner wall opposing the radially outer wall. The radially inner wall can include: a first section including a substantially uniform slope, and a second section continuous with the first section, the second section having a non-uniform slope.
摘要翻译： 各种实施例包括涡轮机排气扩散器。 在一些实施例中，涡轮机扩散器包括入口，沿着涡轮机扩散器的主轴线与入口相对的出口，以及入口和出口之间的扩散器区域。 扩散器区域可以包括：径向外壁和与径向外壁相对的径向内壁。 径向内壁可以包括：第一部分，包括基本均匀的斜面，以及与第一部分连续的第二部分，第二部分具有不均匀的斜面。
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公开(公告)号：US09062568B2
公开(公告)日：2015-06-23
申请号：US13273387
申请日：2011-10-14
CPC分类号： F01D25/24 , F01K7/30 , F05D2220/31
摘要： An asymmetric butterfly plate for a steam turbine exhaust hood includes a non-symmetrical curvilinear profile having a first section that extends to a second section through a vertex. The first section has a first curvilinear profile and the second section has a second curvilinear profile that is distinct from the first curvilinear profile.
摘要翻译： 用于汽轮机排气罩的不对称蝶板包括非对称曲线轮廓，其具有通过顶点延伸到第二部分的第一部分。 第一部分具有第一曲线轮廓，第二部分具有与第一曲线轮廓不同的第二曲线轮廓。
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公开(公告)号：US20140010641A1
公开(公告)日：2014-01-09
申请号：US13542492
申请日：2012-07-05
CPC分类号： F01D25/30 , F01D25/305 , F05D2220/31 , F05D2260/601 , Y10T29/49234
摘要： An exhaust system for use with a steam turbine is provided. An exhaust hood includes an input and an output, the input receiving fluid from the steam turbine. The exhaust hood includes a first side wall that extends between the input and the output. The first side wall includes an aperture. An ejector is coupled to the exhaust hood. The ejector includes inlets and an outlet. At least one of the inlets receives fluid from the exhaust hood via the aperture.
摘要翻译： 提供了一种用于汽轮机的排气系统。 排气罩包括输入和输出，输入接收来自蒸汽轮机的流体。 排气罩包括在输入和输出之间延伸的第一侧壁。 第一侧壁包括孔。 喷射器联接到排气罩。 喷射器包括入口和出口。 入口中的至少一个经由孔从排气罩接收流体。
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公开(公告)号：US09109467B2
公开(公告)日：2015-08-18
申请号：US13542492
申请日：2012-07-05
IPC分类号： F01D25/30
CPC分类号： F01D25/30 , F01D25/305 , F05D2220/31 , F05D2260/601 , Y10T29/49234
摘要： An exhaust system for use with a steam turbine is provided. An exhaust hood includes an input and an output, the input receiving fluid from the steam turbine. The exhaust hood includes a first side wall that extends between the input and the output. The first side wall includes an aperture. An ejector is coupled to the exhaust hood. The ejector includes inlets and an outlet. At least one of the inlets receives fluid from the exhaust hood via the aperture.
摘要翻译： 提供了一种用于汽轮机的排气系统。 排气罩包括输入和输出，输入接收来自蒸汽轮机的流体。 排气罩包括在输入和输出之间延伸的第一侧壁。 第一侧壁包括孔。 喷射器联接到排气罩。 喷射器包括入口和出口。 入口中的至少一个经由孔从排气罩接收流体。
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公开(公告)号：US20130094956A1
公开(公告)日：2013-04-18
申请号：US13273387
申请日：2011-10-14
IPC分类号： F01D9/02
CPC分类号： F01D25/24 , F01K7/30 , F05D2220/31
摘要： An asymmetric butterfly plate for a steam turbine exhaust hood includes a non-symmetrical curvilinear profile having a first section that extends to a second section through a vertex. The first section has a first curvilinear profile and the second section has a second curvilinear profile that is distinct from the first curvilinear profile.
摘要翻译： 用于汽轮机排气罩的不对称蝶板包括非对称曲线轮廓，其具有通过顶点延伸到第二部分的第一部分。 第一部分具有第一曲线轮廓，第二部分具有与第一曲线轮廓不同的第二曲线轮廓。
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公开(公告)号：US20130047612A1
公开(公告)日：2013-02-28
申请号：US13221044
申请日：2011-08-30
CPC分类号： F01D25/24 , F01D25/30 , F05D2250/70 , F05D2250/711
摘要： A steam turbine exhaust hood includes an exhaust hood section, and a butterfly plate arranged in the exhaust hood section. The butterfly plate includes a complex curvilinear cross-sectional profile having a first section that extends between a first end portion and a middle portion, and a second section that extends between the middle portion and a second end portion. One of the first and second sections is formed from at least two curvilinear segments including at least one curvilinear segment having a positive curvature and at least one curvilinear segment having a negative curvature.
摘要翻译： 蒸气涡轮机排气罩包括排气罩部分和布置在排气罩部分中的蝶板。 蝴蝶板包括具有在第一端部和中间部分之间延伸的第一部分的复杂曲线横截面轮廓，以及在中间部分和第二端部部分之间延伸的第二部分。 第一和第二部分中的一个由至少两个曲线段形成，包括至少一个具有正曲率的曲线段和至少一个具有负曲率的曲线段。
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