화력 발전소용 고압펌프 주입식 축 씰의 동특성 계수 예측

Abstract

From 1988, the method of water treatment had changed from all-volatile treatment to oxygen treatment at the thermal power plant in Korea. It was becoming the cause of serious leakage problems with frequency on mechanical seal of boiler feed water pump. Due to seal arrangement leakage problems in feed water pumps, domestic power stations are changing their structure to the sealing arrangements with the injection-type shaft seals. It is planned to expand according to the effect of this type of seal arrangements. In centrifugal pumps the leakage and dynamic characteristics of annular seals are important factors for pump performance. Both seal leakage and dynamics characteristics are greatly affected by the relationship between fluid flow and wall friction. This study was predicted rotordynamic coefficients for an injection-type shaft seal considering the thermal strain due to the high temperature.