国内早期生产的水轮机桨叶密封大多用λ形结构形式。但是从大部分国内机组的运行情况来看密封失效现象普遍存在，说明这种密封形式不适应要求长时间稳定运行的水轮机组。研理公司通过长时间的技术攻关，筛选出摩擦系数低、机械强度高、耐油、耐水介质寿命长的弹塑聚合物合金，并设计出V型组合密封结构，为国内外多家电厂解决了此类问题。目前，已成功为国内多家大型轴流转桨、灯泡灌流电站解决了长期渗漏的问题。

The blade seals of turbines manufactured in early years in China have mostly used λ structure. However, the phenomenon of seal failures were widely found in the operations of most domestic units, which shows that this sealing form does not meet the requirements of long-term reliable operation of hydro-turbine units. After a long period of technical research, Techemer Composites has screened out the elastic-plastic polymer alloy with low friction coefficient, high mechanical strength, oil resistance and water resistant medium of long service life, and designed V-shaped combined sealing structure, which has solved such problem for many power plants at home and abroad. At present, we have successfully solved the problem of long-term leakage in many China’s large-scale power plants using axial flow propeller turbines and bulb tubular turbines.