SMC汽缸变形较大或漏汽严重的结合面，采用研刮结合面的方法
如果上缸结合面变形在0.05mm范围内，以上缸结合面为基准面，在下缸结合面涂红丹或是压印蓝纸，根据痕迹研刮下缸。如果上缸的结合面变形量大，在上缸涂红丹，用大平尺研出痕迹，把上缸研平。或是采取机械加工的方法把上缸结合面找平，再以上缸为基准研刮下缸结合面。汽缸结合面的研刮一般有两种方法：
⑴是不紧结合面的螺栓，用千斤顶微微推动上缸前后移动，根据下缸结合面红丹情况来研刮。这种方法适合结构刚性强的高压缸。
⑵是紧结合面的螺栓，根据塞尺的检查结合面的严密性，测出数值及压出的痕迹，修刮结合面，这种方法可以排除汽缸垂弧对间隙的影响。
⒉采用适当的汽缸密封材料
因汽轮机汽缸密封剂还没有统一的国家标准和行业标准，制作原料和配方也各不相同，产品质量参差不齐；在选择汽轮机汽缸密封剂时，就要选在行业内有口碑，产品质量有保证的正规生产厂家，以保证检修处理后汽缸的严密性。
局部补焊的方法
由于汽缸结合面被蒸汽冲刷或腐蚀出沟痕，选用适当的焊条把沟痕添平，用平板或平尺研出痕迹，研刮焊道和结合面在同一平面内。汽缸结合面变形较大或是漏汽严重时，在下缸的结合面补焊一条或两条10—20mm宽的密消除间隙封带，然后用平尺或是扣上缸测量，并涂红丹研刮，直到消除间隙。此操作的工艺也很简单，焊前预热汽缸至150℃，然后在室温下进行分段退焊或跳焊。选用奥氏体焊条，如A407、A412，焊后用石棉布覆盖保温缓冷。待冷却室温后进行打磨修刮。

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