| 摘要 |
PURPOSE:To provide possibility of revolving at a very low speed for an arrange ment in which a turning disc is rotated by oil flowing through a pipe diverging from the bearing lubricant line of a steam turbine, by furnishing an oil pressure adjusting valve in parallel with a check valve in the divergent pipe. CONSTITUTION:In this turning device of oil pressure type, a turning disc 3 with turning blades 3a is installed on the turbine wheel shaft 5, and the oil red to a nozzle 4 from a line 8 is sprayed toward these turning blades 3a so as to spin the disc 3 at a low speed. The line 8 diverges from an oil supply line 7 furnished with an aux. oil pump 6 for lubrication of bearing 2, and there a check valve 9 is installed. Here this divergent line 8 is connected with a line 10 for shunting the said check valve 9, and a motor-driven oil pressure adjusting valve 10 is installed on this line 10. This oil pressure adjusting valve 10a is adjusted by an oil pressure setting device so as to adjust the revolving speed of the turbine wheel shaft 5 into that low revolving speed which is required at the time of field balance. |
