汽轮机叶片汽道的结构模型研究  

Study on structural model of steam turbine blade

作　　者：曾岳飞[1] 谌永祥[1] 钟成明[2] 江敏[1] 吴越[1] 

机构地区：[1]西南科技大学制造科学与工程学院,绵阳621010 [2]东方汽轮机有限公司,德阳618000

出　　处：《机械设计与制造》2012年第3期247-249,共3页Machinery Design & Manufacture

基　　金：四川省科技支撑计划项目(2010GZ0103)

摘　　要：叶片作为汽轮机的重要组成部分,决定着能量的转换效率。对汽轮机动叶片的结构特征进行了研究,从叶型的特点,结合国际标准化组织颁布的工业产品数据交换标准的要求,选取了三次均匀有理B样条和2×3次非均匀有理B样条为叶型的数学模型,推导了各自的矩阵表达式,证明了曲线的连续性,实现了叶片的数字化表示。由矩阵表达式可以看出,明显的三次均匀有理B样条比2×3次非均匀有理B样条方法的计算量小、简单和便于控制等,为后续的插补算法研究提供了理论支持。As an important part of the steam turbine,blade determines the energy conversion effi- ciency.The features of the structure of steam turbine blades will be researched in it.And according to the characteristics of blade profile as well as the requirements of STEP issued by ISO, Cubic Uniform Rational B-spline and 2×3 drgee Non-Uniform Rational B-spline will be chosen to build the mathematical model of the blade,which matrix expression is later deduced respectively that prove the continuity of the curve,real- ize the digital expression for the blades. From the matrix expression, obvious Cubic Uniform Rational B- spline has more advantages than 2×3 drgee Non-Uniform Rational B-spline method,such as less computa- tions,simple and easy control,etc,which can provide theoretical support for subsequent interpolation algo- rithms.

关 键 词：汽轮机叶片 叶型 均匀有理B样条 非均匀有理B样条 

分 类 号：TH16[机械工程—机械制造及自动化]