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泄水锥是水轮机转轮中的一主要部件,一般都用螺栓联接在转轮上。主要作用是以锥体表面为导向,引导水流从转轮出水边出来后沿轴向方向旋转流向尾水,以降低水力损失。由于安装或检修时螺栓未上紧,或因电站运行管理差,经常出现甩负荷现象。在这种工况下运行,当变化的横向力作用住汇水锥上时,使固定泄水锥的螺栓由于材料疲劳而断裂。这种横向力可能是由于漩涡脱离,或非对称的汽蚀汽泡的出现和消失;或由于在吸出管喉口处泄水
Hatch cone is a major component of the turbine runner, are generally bolted to the runner. The main role is to guide the cone surface, guide the water flow out from the runner edge of the axial direction of rotation to the tail water to reduce water loss. Due to the installation or maintenance of the bolt is not tight, or due to poor operation and management of power plants, load rejection often appear. In this operating condition, when a varying lateral force acts on the sink cone, the bolt securing the sink cone breaks due to material fatigue. This lateral force may be due to the vortex detached, or asymmetric cavitation bubbles appear and disappear; or due to the suction pipe throat discharge