System for continuously monitoring and alarming lifting position of main shaft of steam turbine

The utility model discloses a system for continuously monitoring and alarming the lifting position of a main shaft of a steam turbine, which comprises a main body unit and a connecting unit, and the main body unit comprises a rotating shaft, a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder; the connecting unit comprises a bearing, a lower bush, an upper bush, a detection probe and a control cable. The detection probe is placed in the inner cavity of the connecting groove for connection, during operation, the detection probe monitors the jacking height in real time, the detection probe transmits a measurement signal to the control cable, the control cable transmits the signal to the master controller, the master controller analyzes the signal, and the jacking height is monitored in real time. When the height exceeds a preset value or the low degree exceeds a preset value, a signal is transmitted to the displayer through the master controller, an alarm is given out through