大型发电机组密封油流量波动的原因分析及对策

Cause Analysis and Countermeasures of Seal Oil Flow Fluctuation of Large Size Generator Set

结合华能德州电厂三期工程5号机组发电机密封瓦及密封油系统的工作状况,分析了采用单流环密封瓦发电机组在启动过程中密封油流量异常增大的根本原因是:润滑油温度升高密封油箱油位降低是因为密封油系统供油量增大,而从主油箱来的补油量少于供油量造成的。因此提出了相应的解决办法,如在机组盘车时将润滑油温控制在32℃左右;在冲转前将润滑油箱的油温至少提高到35℃等。试验证明这些措施是正确的。

In light of the working status of No.5 generator＇ s seal oil pad and seal oil systemin Huaneng Dezhou Power plant 3rd phase project,the analysis held that,when single flow ring - seal pad was used, the basic Cause for seal oil flow abnormal increasing during start-up was the rising of lubrication oil tenoerature.The lowering ofoil level in the seal oil tank resulted from the increasing of oil supply of seal oil system, while the make - up oil fore the oil tank was less than the oil supply. consequently the corresponding measures was proposed.For example,the terrperature of lubrication oil during turning of unit was controlled at about 32 ℃,and the oil temperation of lubrication oil tank was： raised at least to 35 ℃ bef3re impulse starting etc. The test proved these measures were correct.