船用主汽轮机组测速泵改进的试验研究

通过理论计算片式和浮动式两种密封结构测速泵的漏油量，比较两种结构的漏油量受密封间隙变化的影响程度，提出改进方案。对浮动式密封结构的测速泵进行试验并得出结论，为船用主机组超速保护装置的改造提供理论和试验依据。

Experimental Investigation on the Improvement of a Speed Measuring Pump for a Marine Steam Turbine Unit

The theoretical calculation of oil leakage of a speed-measuring pump with either plate-type or floating-type seal construction has been performed and the oil leakage as influenced by the seal gap change in these two types of seal construction compared and identified. On this basis the authors have come up with an improved version. A test was conducted of the speed-measuring pump with a floating type seal construction and reliable conclusions obtained. All the above has provided a theoretical and experimental basis for the improvement of an overspeed protection device for a main steam turbine.