常调试水泵的密封工艺.doc

常调试水泵的密封工艺 污水泵产品常用的密封形式有两种:填料密封和机械密封。填料密封,最古老的一种密封结构,发源于 工业 革命之前的传统密封装置,有着100年的材料工艺、润滑剂系统和制造方法,并保持持续进步,目前很多的应用场合。经分析,该软填料密封结构存在如下缺陷: Sewage pump products commonly used seal form has two kinds: packing seal and mechanical seal. Packing seal, one of the most ancient seal structure, originated in traditional sealing device before the industrial revolution, with its 100 years of material technology, lubricant system and manufacturing method, and keep continuous improvement, at present a lot of applications. By the analysis of the soft packing seal structure defects are as follows: 　 1.密封介质含有的杂质严重影响密封性能。杂质进入软填料密封内部,进一步增大了填料密封和轴套之间的摩擦、磨损。虽然材料耐磨性较好,但是使用效果仍然不佳,泄漏频繁。另外由于没有采用封液对填料密封进行润滑冷却,也加剧了填料与轴套之间的磨损。 1. Sealing medium containing impurities seriously affect the sealing performance. Impurities into the soft packing seal, further increases the friction between packing seal and shaft sleeve, wear and tear. Although material abrasion resistance is good, but the use effect is still poor, leak frequency. Because there is no other of the packing seal by sealing liquid lubrication cooling, also aggravate the wear between packing and shaft sleeve. 　　2.工作状态不稳定需频繁调整和更换填料。由于软填料自身具有的粘弹特性,在工作状态下会出现明显的应力松弛。为保持其正常的密封功能,需不断地通过压紧压盖来增大填料与轴的径向接触力,同时也增大了软填料与轴的磨损,因此不得不经常更换(或添加)填料,维修工作量和费用大大增加。 2. The working state is not stable to frequent adjustment and change of packing. Because of the soft packing itself with viscoelastic properties, in the working status will appear obvious stress relaxation. To maintain its normal sealing function, need to constantly increase packing by compression gland and shaft radial contact force, but also increase the soft packing and shaft wear and tear, so often have to change (or add) packing, maintenance workload and cost increase greatly. 　　3.磨损严重致使能耗量大。根据软填料密封的工作机理,填料密封与轴(或轴套)之间必须保持较大的径向接触压力以维持密封,因此填料和轴(或轴套)的摩擦、磨损都很严重,在密封很快失去工作能力的同时,造成相当大的能耗浪费。 3. Wear due to large amount of energy consumption. According to the working mechanism of the