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  • 机械密封泄漏维修对策
  • 本站编辑:杭州久密机械科技有限公司发布日期:2020-04-19 20:42 浏览次数:

泄漏维修对策

1.针对动作不良的对策

首先使用耐磨性好并且橡胶弹性好的O形环,这种环在发生轻微的损伤时依旧能够保持固有的形状和大小,继续保持密封的作用。一般用于密封的O形环大多选用橡胶或者是聚四氟乙烯。聚四氟乙烯主要有腐蚀的作用,作为波纹垫片或者是V型管等都是可以的。若是在高温或者是低温条件下,一般选择不锈钢等材质的波纹管来作为密封环,如果要求旋转型的机械密封,密封环就要采用O形环来进行滑动密封。

我们可以考虑采用寿命长的静止型机械密封,把静环安装在轴一侧,而动环安装在机壳一侧,这样就不会由于机械变形而对装置产生影响,同时对于平面度的结构也有良好的保持作用。同时这种安装方式弹簧是不接触密封液的,动作性得到了很好的改善,在清除浆料以及保持密封的平面度和机器精度等工序上,提供了很大的方便 。

机械密封由于受热引起的影响也是非常大的,受热会导致材料变性和零件变形,导致负荷能力的改变,这样很大程度上降低了密封的工作性能和被烧毁情况。处理方法需要通过热量的大小视情况而定,有自然冷却、内循环冷却、外冲洗冷却和内循环冷却等等,并且控制密封的温度,使密封效果达到最好。

2.针对滑动面的对策

在设备维护以及检修上,认真检查设备有无磨损以及滑痕现象,保证静环表面的精度。同时,采用静止型的机械密封方式能够很好的解决磨损问题。另外一个解决滑动部件材料应力变化的密封热变形的方法是将密封环的O环或者石墨环的保持方式从滑动形式改变为插入式。

3.防止干滑动的对策

如果是由于滑动发热时冷却不足而导致滑动面损伤造成的千滑动的话,我们可以选择配置更加完善的密封液以及冷却水和温控单元,同时还需要对供给的管线进行巡回的检查,防止发生堵塞现象。选择机械密封时,最好采用 耐浆性较优良的静止型机械密封,这样可以更好的防止干摩擦发生。另外,加强对旋转机械的运行管理,按时检查机械密封的压力等各种参数和状态,及时解决相关问题,这一点对于保持机械的完好性以及正常运转是非常重要的。

结束语

综上所述,化工机械密封的泄漏问题是一项非常重要的问题,它直接关系到整个化工生产的安全,一旦发生泄漏,很可能造成重大的事故发生。因此在机械密封的问题上我们需要着重探究,研究出更好的维修和防范政策。

Countermeasures for leakage maintenance 1. For the countermeasure of bad movement, the o-ring with good wear resistance and good rubber elasticity is used first. This o-ring can keep its original shape and size and keep the sealing function when slight damage occurs. The o-ring used for sealing is usually rubber or polytetrafluoroethylene. The polytetrafluoroethylene is primarily corrosive and can be used as a corrugated gasket or as a v-shaped tube. If in high or low temperature conditions, the general choice of stainless steel and other materials as a bellows seal ring, if the rotating type of mechanical seal, seal ring to use the o-ring sliding seal. We may consider using a long-life static mechanical seal, in which the static ring is mounted on one side of the shaft and the dynamic ring is mounted on the other side of the casing, so as not to affect the device due to mechanical deformation, at the same time, it also has a good maintenance function for the structure of flatness. At the same time, the installation method does not contact with the sealing fluid, and the movement of the spring is greatly improved, which provides great convenience in cleaning the slurry, keeping the flatness of the seal and the precision of the machine. The mechanical seal is also very big because of the influence caused by the heat, the heat will cause the material denaturation and the part distortion, will cause the load ability to change, thus greatly reduced the seal working performance and has been burnt the situation. The treatment method needs to pass the size of heat depending on the situation, including natural cooling, Inner Circulation Cooling, Outer Flushing Cooling and inner circulation cooling, and control the temperature of the seal to achieve the best sealing effect. 2. For the sliding surface of the countermeasures in equipment maintenance and repair, carefully check whether the equipment wear and sliding mark phenomenon, to ensure the accuracy of the static ring surface. At the same time, the static mechanical seal can solve the problem of wear and tear. Another way to solve the problem of thermal deformation is to change the holding mode of o-ring or graphite ring from sliding mode to inserting mode. 3. Countermeasures against dry sliding if the sliding surface is damaged due to insufficient cooling when the sliding heat is generated, we can choose to configure a more complete seal fluid and cooling water and temperature control unit, at the same time also need to supply the pipeline for the inspection tour, to prevent the occurrence of blockage. When selecting mechanical seal, it is best to use static mechanical seal with good slurry resistance, which can better prevent dry friction. In addition, it is very important to strengthen the running management of rotating machinery, check the pressure of mechanical seal and other parameters and states, and solve the related problems in time. In conclusion, the leakage of chemical mechanical seal is a very important problem, which directly affects the safety of the whole chemical production. Once the leakage occurs, it is likely to cause a major accident. Therefore, we need to focus on the mechanical seal on the issue of research, research out a better maintenance and prevention policy.