遵义发电厂8号机给水泵轴封装置原来采用浮动环密封，该密封装置由于结构原理的限制，动静配合间隙小，对密封水水质、压力要求高，因此给水泵运行存在一定的安全隐患。经改用螺旋密封结构后，因其动静配合间隙大，故对密封水压力要求不高，取得了良好的经济效益和安全效益。%A screw sealing technique is put forward and has been utilized in retrofitting the sealing of feed-water pump for unit No.8 of Zunyi Power Plant.Application of this technique has good economic and social benefits.
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