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导叶是水轮机的重要过流部件之一,加工质量的好坏直接影响到水轮发电机组的封水性能及其稳定运行。观察了多种型号水轮机的导叶,发现其制造质量并不理想。现以凹形导叶为例,剖析其按习惯的加工方法所得的导叶的不足之处,探究其产生原因,提出今后的改进措施。标准的凹形导叶叶型如图1所示,按理想
The guide vane is one of the important overcurrent components of the turbine. The quality of the processing directly affects the sealing performance of the hydroelectric generating set and its stable operation. The guide vanes of many types of turbine were observed and found that their manufacturing quality was not satisfactory. Take the concave guide vane as an example to analyze the disadvantages of the guide vane obtained by the conventional machining method, explore the causes and propose the improvement measures in the future. Standard concave guide vane type shown in Figure 1, according to the ideal