摘要
为了进一步提高离心泵的水力性能,提出了一种扭曲叶片设计绘形新方法.这一方法在吸取传统扭曲三角形绘形法某些特点的同时,在保证叶片上相对流线的安放角合理变化的条件下,设计人员能根据需要给定各流线的包角,从而优化了这一几何参数.给出了这一方法的基本原则,即在一个与叶轮轴心线垂直的平面上,根据给定的叶片包角和安放角均匀变化的要求,直接绘形叶片表面相对流线的投影曲线,然后在局部全等的条件下获得曲线的展开图,以检查和修正投影曲线.给出了这一方法的详尽绘形过程.
In order to improve the hydraulic performance of distorted blades in centrifugal pump, a new method to design and draw this type of blade was presented. The new method contains some traditional features of ＂distorted triangle＂ method, and also some new features. While ensuring the reasonable dis- tribution of setting angle along a relative streamline on blade surface, a specific wrapping angle of the streamline is given based on the requirements to optimize the angle. On a plane perpendicular to impeller axis, based on a given wrapping angle and even distribution of setting angles, the projected curve of the streamline lying on blade surface can be plotted. Then, under the condition of localized identity, this curve is inspected and corrected. The detailed blade drawing process is also described.
出处
《排灌机械》
2008年第3期39-41,共3页
Drainage and Irrigation Machinery
基金
四川省重点学科项目(SZD6412)
关键词
离心泵
扭曲叶片
绘形
包角
设计
centrifugal pump
blades
drawing
wrapping angle
design
