1　概述一般来说 ,设备传动轴的轴封要求使用方便 ,运行期长 ,密封可靠。目前可供选择的轴封有填料密封、唇形、迷宫密封及机械密封等形式。填料密封、油封虽然结构简单 ,更换方便 ,但因密封性能差 ,寿命较短 ,而很少使用 ;迷宫密封要求设备精度高 ,且受设备使用条件限制 ;集装 1 General In general, shaft seals on equipment require easy access, long operating life and reliable sealing. Currently available seal with packing seal, lip, labyrinth seal and mechanical seals and other forms. Packing seal, although the oil seal structure is simple, easy to replace, but due to poor sealing performance, shorter life expectancy, and rarely used; labyrinth seal requires high precision equipment, and the equipment used by the conditions of the restrictions;