公开(公告)号：US06533546B2

公开(公告)日：2003-03-18

申请号：US09917906

申请日：2001-07-31

申请人： Franz Kreitmeier

发明人： Franz Kreitmeier

IPC分类号： F01D2530

CPC分类号： F01D9/02 ,  F01D25/30

摘要： An axial/radial three-channel diffuser is provided with two guide vanes for dividing the diffuser into three partial diffusers that are distributed so that the distribution of the surface area over the three partial diffusers in the inlet surface area is uneven. The guide vanes are oriented in accordance with the total pressure field after the last rotating blade row and are arranged at a minimum distance from the trailing edge of the last rotating blade row. Because of its long extension in relation to the channel heights of the partial diffusers, the three-channel diffuser brings about a gentle deflection of the diffuser flow. The diffuser according to the invention results in an improved pressure recovery and increased turbine performance.

摘要翻译： 轴向/径向三通道扩散器设置有两个导向叶片，用于将扩散器分成三个部分扩散器，其分布成使得入口表面区域中的三个部分扩散器上的表面积的分布不均匀。 引导叶片根据最后一个旋转叶片排之后的总压力场定向，并且布置在距离最后旋转叶片排的后缘最小的距离处。 由于其相对于部分扩散器的通道高度的长延伸，三通道扩散器导致扩散器流的温和偏转。 根据本发明的扩散器导致改进的压力恢复和增加的涡轮机性能。

公开(公告)号：US06733238B2

公开(公告)日：2004-05-11

申请号：US10079853

申请日：2002-02-22

申请人： Takashi Hiyama ,  Eisaku Ito

发明人： Takashi Hiyama ,  Eisaku Ito

IPC分类号： F01D2530

CPC分类号： F01D5/143 ,  F01D25/30

摘要： There is provided an axial-flow turbine comprising an exhaust chamber; a turbine including multiple stage rotor blades, said multiple stage rotor blade including terminal stage rotor blades; an annular diffuser located between the turbine and the exhaust chamber; and an annular axial-flow turbine passage defined by the turbine, the diffuser and the exhaust chamber, wherein fluid flows through the axial-flow turbine passage toward the exhaust chamber, and an annular stepped portion which inwardly projects in a radial direction is formed on the portion of an inner wall of the axial-flow turbine passage that is located on the downstream side of a trailing edge of a tip portion of the terminal stage rotor blades provided in the flow direction of the fluid. In the stepped portion, a projecting portion which inwardly projects in a radial direction may be provided.

摘要翻译： 提供了一种包括排气室的轴流涡轮机; 包括多级转子叶片的涡轮机，所述多级转子叶片包括端子级转子叶片; 位于涡轮机和排气室之间的环形扩散器; 以及由涡轮机，扩散器和排气室限定的环形轴流涡轮机通道，其中流体流过轴流涡轮机通道朝向排气室，并且在径向方向上向内突出的环形台阶部分形成在 轴流涡轮机通道的内壁的位于沿流体流动方向设置的端子台转子叶片的末端部分的后缘的下游侧的部分。 在阶梯部分中，可以设置沿径向向内突出的突出部分。

公开(公告)号：US06419448B1

公开(公告)日：2002-07-16

申请号：US09531541

申请日：2000-03-20

申请人： Jerzy A. Owczarek

发明人： Jerzy A. Owczarek

IPC分类号： F01D2530

CPC分类号： F01D1/02 ,  F01D25/30 ,  F05D2250/52 ,  Y10S415/914

摘要： A flow by-pass system is provided in a downward-discharging exhaust hood of a steam turbine to by-pass a small percentage of the total steam flow from the top portion of the exhaust hood to the vicinity of the condenser and in that way relieve excess pressure in the top portion incident to the more convoluted path of the main portion of steam passing from the top to the bottom and to decrease energy loss caused by friction and thus to improve turbine efficiency. The flow by-pass system includes by-pass conduits within the front portion of the exhaust hood extending from the top portion to the vicinity of the condenser. Such conduits are formed by covering over the corners between the outer and end walls of the exhaust hood and between the exhaust hood end wall and the bearing cone outside surface with by-pass walls to form flow passages in the corners behind the by-pass walls through which exhaust steam may pass from the region of higher pressure in the top portion of the exhaust hood to the region of lower pressure in vicinity of the condenser. Inlets and outlets are provided in the by-pass walls for entrance and exit of the turbine exhaust steam to the by-pass conduits.

摘要翻译： 在蒸汽涡轮机的向下排气排气罩中设置流量旁通系统，以将从排气罩顶部的总蒸汽流量的一小部分旁通至冷凝器附近，从而减轻 顶部的入口压力超过从顶部向底部通过的蒸汽主要部分的更多回旋路径，并减少由摩擦引起的能量损失，从而提高涡轮效率。 流量旁通系统包括从顶部到冷凝器附近的排气罩前部内的旁路管道。 这种导管通过覆盖在排气罩的外壁和端壁之间的角部以及在排气罩端壁和轴承锥体外表面之间的旁路壁上形成，以在旁路壁之后的角落中形成流动通道 通过该排气蒸汽可以从排气罩顶部的高压区域经过冷凝器附近的低压区域。 在旁路壁上设有入口和出口，用于涡轮机排气蒸汽进入旁路管道。

公开(公告)号：US06231304B1

公开(公告)日：2001-05-15

申请号：US09445018

申请日：2000-02-17

申请人： Karl-Erik Andersson

发明人： Karl-Erik Andersson

IPC分类号： F01D2530

CPC分类号： F01D25/30

摘要： An outlet device for a flow machine, comprising a channel for a flow from the machine and a guide vane arrangement provided downstream of the channel and connecting the channel with an outlet housing. The guide vane arrangement is arranged to redirect outwardly a first part flow of the flow from the channel into the first chamber of the outlet housing. The outlet device comprises at least one bypass channel extending from the channel through the guide vane arrangement and arranged to guide a second part flow of the flow to bypass the guide vane arrangement to a second chamber of the outlet housing.

摘要翻译： 一种用于流动机器的出口装置，包括用于来自机器的流动的通道和设置在通道下游并将通道与出口壳体连接的导向叶片装置。 引导叶片装置布置成将流的第一部分流从外部向外重新定向到出口壳体的第一室。 出口装置包括至少一个旁通通道，该通道从通道延伸穿过引导叶片装置，并布置成引导流体的第二部分流动绕过引导叶片装置到出口壳体的第二室。