| 摘要 |
PURPOSE:To prevent overshoot of the oil temperature in controlling the oil temperature of a turbine by bringing an established value, established at the target temperature at the starting time, in congruity with the actual temperature when the temperature deviation comes to be less than the predetermined value and further raising the established value to the target temperature according to a predetermined rate of change. CONSTITUTION:Opening of an oil temperature adjustment valve 6 is controlled according to a deviation of a signal of an oil temperature detector 2 of a turbine from a signal of the oil temperature establishment circuit 1. Said circuit 1 is established at the target temperature simultaneously with starting of the turbine. When the oil temperature rises and the deviation of the target signal from the detected oil temperature comes to be less than a predetermined value, a comparator 3 puts the actual temperature coincidence circuit 4 and a rate of change establishment circuit 5 in operation and, after bringing the oil temperature establishment signal in coincidence with the actual temperature, the establishment signal is raised to the target temperature by some rate of change. Accordingly, the oil temperature is quickly raised and an overshoot can be reduced. |
