Method for adjusting axial displacement of steam turbine and setting protection fixed value

The invention relates to the field of steam turbine testing methods, in particular to a steam turbine axial displacement adjusting and protection constant value setting method, which comprises the following steps: during positioning, pushing a steam turbine large shaft to a working tile, enabling the steam turbine large shaft to cling to the tile surface of the working tile, positioning the far end of the tile surface of the working tile as a zero point, and reversely pushing the steam turbine large shaft to a non-working surface; the large shaft of the steam turbine is tightly attached to the non-working face, and a normal working gap is kept between the non-working face and the working face; calculating and adjusting a negative trip value and a positive trip value of the steam turbine unit according to the trip value setting of the axial displacement and the working clearance; two or three axial displacement probes are arranged on a cylinder body on the side surface of the thrust disc, and the axial displac