| 摘要 |
PURPOSE:To ensure a fixed quantity of more of cooled oil supplied to a sealing oil tank, and to prevent a temperature rise of oil in the sealing oil tank by setting up a bypass circuit between the discharge piping of a sealing oil pump on the upstream side of a differential pressure regulating valve and an air extracting tank. CONSTITUTION:The seal ring of a generator 1 is supplied with sealing oil in the sealing oil tank 4 through the differential pressure regulating valve 21 and a feed pipe by the sealing oil pump 19, and sealing oil branching to the outside of the generator is collected into the air extracting tank 5, and returned into an oil tank 9. Oil in the oil tank 9 is cooled by a cooler 11, and resupplied to a bearing device 2 while one part is forwarded into the sealing oil tank 14. The bypass circuit 25 through a closing device 26 and a bypass valve 27 is set up between the discharge piping 20 of the sealing oil pump 19 on the upstream side of the differential pressure regulating valve 21 and the air extracting tank 5, the quantity of oil corresponding to the quantity of reduction of the quantity of sealing oil supplied to a sealing 3 is forwarded directly into the air extracting tank 5 from the pump discharge pipe 20, and the sealing oil tank 14 is supplied with cooled sealing oil in the same quantity as normal operation. |
