一、概述在大型水力机械中,采用稀油润滑轴承能使机组运转稳定、振动噪音小、检修周期长。由于油轴承的位置一般设在转轮附近,为此必须有一组安全可靠的转轴密封来保护油润滑轴承,以免含有泥沙杂质的污水进入轴承部件。在传统结构中,大型转轴密封往往采用填料密封、平板橡胶密封或梳齿密封等。随着机械密封技术发展,目前在日本、西欧等国生产的大型水力机械中,已有用机械密 First, an overview In large hydraulic machinery, the use of thin oil-lubricated bearings can make the unit stable operation, vibration and noise, long maintenance cycle. Since the oil bearing is generally located near the runner, a reliable and reliable shaft seal must be provided to protect the oil-lubricated bearings against the risk of sediment-laden contaminated water entering the bearing components. In the traditional structure, large shaft seals are often used packing seal, flat rubber seal or comb seal. With the development of mechanical seal technology, currently in Japan, Western Europe and other countries produced large-scale hydraulic machinery, has been used mechanical seal