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录水河水电厂,冲击式水轮机喷管的伸缩节以及某些球形阀与钢管连接的伸缩节,厂家制造用图甲所示的结构型式。这种型式的伸缩节的最大缺点是容易漏水。如录水河电厂冲击式水轮机第一次充水时,由于喷管上的伸缩节漏水严重,使机组启动试运转无法进行。漏水原因是:安装时没有选好盘根A的恰当尺寸以及没有把盘根A正确装在盘槽内,高压水沿着图甲中箭头所示方向,越过盘根A造成漏水。改进方法:根据盘根槽大小,恰当地选
Recorder Water Power Plant, the impact of the turbine nozzle expansion joints and some of the spherical valve and the expansion joints connected steel pipe, manufacturers use the structure shown in Figure A structure. The biggest drawback of this type of telescopic section is easy to leak. For example, when the Shuihe River Power Plant impulse turbine is filled with water for the first time, it is impossible to start the trial operation of the unit due to serious water leakage at the telescopic section of the spout. Leakage reasons are: the installation did not choose the right size packing A and did not put the packing A correctly installed in the tray, high pressure water along the direction of the arrows in Figure A, across the packing A caused by leakage. Improvements: According to the size of packing groove, properly selected