Turbine barring device

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1. During normal operation, the control oil flows through the throttle valve 14 and the check valve 13 to act on the upper side of the cylinder, thereby locking the turntable device； 2. During cranking, the cranking oil pump is connected to a regulating oil supply; thus, after being pressurized by the cranking oil pump, the oil passes through throttle valve 17 and solenoid valve 11 to act on the lower part of the cylinder (during this process, the pressure in the upper chamber of the cylinder remains at 0.8 Mpa). The solenoid valve 11 opens and closes periodically, thereby enabling periodic movement of the cylinder. The control signals for this movement come from two position sensors located in the upper part of the cylinder. The safety valve 16 ensures that the pressure at the pump outlet remains constant, the relief valve 18 maintains a constant pressure in the cranking oil supply, and the pressure reducing valve 12 keeps the pressure above the cylinder constant during its movement