排气阀阀盘与阀杆断裂

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原文：
　　　　在阀盘与阀杆的过渡圆角处和阀杆装设卡块的凹槽处，由于这些部位应力容易集中，当应力集中到一定程度，就会发生疲劳断裂破坏。造成断裂的原因有：阀杆与导管的间隙过大；阀盘与阀座的变形使局部受力过大；气阀间隙过大，敲击严重疲劳破坏；气阀机构的振动。阀杆装设卡块的凹槽处是气阀的最薄弱部位，若该处凹槽加工工艺不良或闭阀冲击力较重也会产生疲劳断裂。

“Exhaust valve disc and stem breakage”是由中国针型阀网提供的国际阀门新闻，译文仅供参考。另外，中国针型阀网还提供相关产品搜索：仪表阀组、仪表球阀(气动管路球阀)、仪表截止阀(气动管路截止阀)、更多针型阀产品、针型阀价格等。

译文：
Exhaust valve disc and stem breakage With the stem of the valve disc and stem fillet installed at the card block groove, easy to concentrate on these parts of the stress, when the stress concentration to a certain extent, damage fatigue fracture occurs. Cause fracture of reasons: the stem and the gap is too large catheter; deformation of the valve disc and valve seat so that the local force is too large; valve clearance is too large, percussion severe fatigue damage; valve body vibration. Stem groove block the installation of card is the weakest parts of the valve, the groove processing, if there bad or closed valve will also have a heavier impact of fatigue fracture.

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原文来源：
http://www.1zhenxingfa.com/

2011-12-20 08:01