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1. 发明申请

US20120183397A1 Exhaust System for Steam Turbine 有权
标题翻译：蒸汽轮机排气系统
公开(公告)号：US20120183397A1
公开(公告)日：2012-07-19
申请号：US13343180
申请日：2012-01-04
申请人： Shunsuke MIZUMI , Koji Ogata , Takeshi Kudo , Noriyo Nishijima , Yoshiaki Onda
发明人： Shunsuke MIZUMI , Koji Ogata , Takeshi Kudo , Noriyo Nishijima , Yoshiaki Onda
IPC分类号： F01D25/30
CPC分类号： F01D25/30 , F01D25/24 , F05D2250/52 , F05D2250/73
摘要： An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency.The shape (vertically symmetric) of a flow guide 5A according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guide 5 such that the length of a downstream flow guide portion 5d is greater than that of a upstream flow guide portion 5u. Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portion 5u was set at 0.4 and the flow guide occupation ratio of the downstream flow guide portion 5d was set at 0.7; at values where the total pressure loss coefficient becomes lower than the reference value. The rectification effect of the flow guide can thus be enhanced.
摘要翻译：一种用于蒸汽轮机的排气系统，其在高级或中级涡轮机中设置有改进的环形流动引导件。改进的流动引导件减少排气罩中的流动湍流并减少压力损失，从而提高涡轮机厂的效率。根据传统技术的流动引导件5A的形状（垂直对称）被修改为导流器5的形状（垂直不对称），使得下游流动引导部分5d的长度大于上游流动引导件部分5u。进行数值分析，找出常规技术的最佳流量指数占有率和相应的总压力损失系数。将获得的值用作参考值。另外，将上游侧流动引导部5u的流动导向占有率设定为0.4，将下游侧流动引导部5d的流动导向占有率设定为0.7，其中总压力损失系数变得低于参考值。因此可以提高导流管的整流效果。

2. 发明授权

US09033656B2 Exhaust system for steam turbine 有权
标题翻译：蒸汽轮机排气系统
公开(公告)号：US09033656B2
公开(公告)日：2015-05-19
申请号：US13343180
申请日：2012-01-04
申请人： Shunsuke Mizumi , Koji Ogata , Takeshi Kudo , Noriyo Nishijima , Yoshiaki Onda
发明人： Shunsuke Mizumi , Koji Ogata , Takeshi Kudo , Noriyo Nishijima , Yoshiaki Onda
IPC分类号： F01D25/24 , F01D25/30
CPC分类号： F01D25/30 , F01D25/24 , F05D2250/52 , F05D2250/73
摘要： An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency.The shape (vertically symmetric) of a flow guide 5A according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guide 5 such that the length of a downstream flow guide portion 5d is greater than that of a upstream flow guide portion 5u. Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portion 5u was set at 0.4 and the flow guide occupation ratio of the downstream flow guide portion 5d was set at 0.7; at values where the total pressure loss coefficient becomes lower than the reference value. The rectification effect of the flow guide can thus be enhanced.
摘要翻译：一种用于蒸汽轮机的排气系统，其在高级或中级涡轮机中设置有改进的环形流动引导件。改进的流动引导件减少排气罩中的流动湍流并减少压力损失，从而提高涡轮机厂的效率。根据传统技术的流动引导件5A的形状（垂直对称）被修改为导流器5的形状（垂直不对称），使得下游流动引导部分5d的长度大于上游流动引导件部分5u。进行数值分析，找出常规技术的最佳流量指数占有率和相应的总压力损失系数。将获得的值用作参考值。另外，将上游侧流动引导部5u的流动导向占有率设定为0.4，将下游侧流动引导部5d的流动导向占有率设定为0.7，其中总压力损失系数变得低于参考值。因此可以提高导流管的整流效果。

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