蒸汽轮机抽汽口几何特性及工况特性分析

Study on Extraction Point Geometrical Characteristic and Condition Characteristic of Steam Turbine

用统计分析的方法对回热和供热抽汽口的相对抽汽量、抽汽缝面积与汽室横截面积之比、汽室横截面积与抽汽口前透平级通流面积之比、抽汽缝面积与抽汽口前透平级通流面积之比、抽汽汽室高度与宽度之比、抽汽缝在汽室中的相对位置、抽汽口后级叶高与抽汽口前级叶高之比等工况与几何参数及其相互关系进行了分析研究。

The veried conditions and geometrical Parameters as well as its relationship were analyzed and studied by statistical analysis method. The conditions were the relative extraction flow of backheating and supply heat extraction point, the ratio of the suction slit area to the cross - section area of steam chest, the ratio of the cross --section area of steam chest to the area of turbine stage flow passage before the extraction point, the ratio of the suction slit area to die area of turbine stage flow passage before the extraction point, the ratio of the height to the width of the extraction steam chest, the relative position of the suction slit in the steam chest and the ratio of stage blade neight after the extraction point to the stage blade height before the extraction point.