繁體：閥杆連接
阀杆连接是蒸汽发生器给水控制阀阀内件中关键的机械接口部件，直接连接执行机构与阀芯，传递运动以控制流体流量。
阀杆连接是蒸汽发生器给水控制阀阀内件中关键的机械接口部件。它在执行机构的驱动机构和阀瓣或阀盘之间提供直接的物理连接，传递精确的线性或旋转运动以控制流体流量。该部件必须在高压力差、热循环和腐蚀性给水条件下保持结构完整性，同时确保最小间隙和精确的定位精度，以实现最佳流量控制。 阀杆连接通过将执行机构的力/运动转换为阀瓣的受控运动来工作。它通常采用螺纹、花键或销连接，将执行机构阀杆牢固地耦合到阀内件组件上。设计确保轴向对中和扭矩传递，同时适应热膨胀并防止振动引起的松动。精密加工和表面处理可减少关键接触点的摩擦和磨损。
该组件会出现在以下整机或工业产品中。
诱因 → 失效模式 → 工程缓解
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Common failures include thread galling due to improper lubrication, fatigue cracking from cyclic loading, corrosion-induced pitting in wet steam environments, and wear-induced backlash that reduces control accuracy. Preventive measures include proper material selection, surface hardening, and regular maintenance inspections.
Visual inspections should occur during routine maintenance shutdowns (typically every 6-12 months). Dimensional checks for wear and torque testing should be performed annually. More frequent monitoring (3-6 months) is recommended for valves experiencing high cycling rates or extreme temperature/pressure conditions.
Limited interchangeability exists due to proprietary designs. While some standardized connections (ISO metric threads) may allow cross-manufacturer compatibility, critical factors like stem diameter, thread pitch, torque capacity, and thermal expansion characteristics must be precisely matched. Manufacturer consultation is strongly recommended.
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说明目标数量、应用场景、交期和关键技术要求，用于准备 RFQ 或供应商评估。