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马桥二级水电站有两台HL_(263)-LJ-100型水轮机,额定出力1330kW,采用的是尼龙端面主轴密封。这种主轴密封在日常运行中封水效果差,极易引起水导甩油,而且耐久性差。该机组每年运行约4500h,但主轴密封却要更换3套至4套,方可保障较好的运行。经过我们多方面考证研究,在原主轴密封的基础上设制了一种改造工作简单,花费少的主轴密封。经过1年的运行,其止水性和耐久性都非常好,很适用于使用立式尼龙端面主轴密封的水轮机。其改造有以下几点:
Maqiao II Hydropower Station has two HL_ (263) -LJ-100 turbines, rated output of 1330kW, using a nylon face spindle seal. This spindle seal in the daily operation of the sealing effect is poor, easily lead to oil-induced rejection, and poor durability. The unit runs about 4500h per year, but the spindle seal has to replace 3 sets to 4 sets, in order to protect the better operation. After many of our research, in the original spindle seal on the basis of the establishment of a simple modification, less costly spindle seal. After 1 year of operation, its water fastness and durability are very good, it is suitable for the use of vertical nylon face seal shaft turbine. The transformation has the following points: