超超临界公司百万千瓦汽轮机介绍

4. 阀门<br/>4.1 &nbsp;主汽阀 &nbsp;(MSV)<br/>主汽阀与调节阀为一体式结构，由合金钢铸件同时制成。<br/>主汽阀在限定的汽轮机转速时完全打开，在正常运行时保持完全开启状态。由事故跳闸系统控制执行机构关闭。主汽阀主要的功能是为汽轮机提供第二道保护系统（备用保护），防止在调节阀或正常控制装置失效的情况下大量主蒸汽进入汽轮机。同时，在正常停机或手动事故跳闸时主汽阀也会关闭。主汽阀内部装有精过滤网，实现多层过滤。最外层是粗网，里层是精网，钻孔板及滤网体，可有效的避免固粒腐蚀。为了消除汽流不稳定和冲击波引起的阀杆振动，选用了低振动型调节阀，提高了可靠性。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4.2 &nbsp;调节阀 &nbsp;(CV)<br/>蒸汽通过主汽阀后，流过调节阀进入到高压缸。<br/>调节阀用来调节进入到汽轮机的蒸汽量。通过汽轮机的液压系统由电液转换器（

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