The axial displacement of the steam turbine refers to the amount of movement of the steam turbine rotor. Specifically, it is the amount of movement of the rotor thrust disk between the thrust shoes.
The axial displacement reflects the relative position of the rotating part and the stationary part of the steam turbine. The change of the axial displacement is also the change of the axial relative position of the stator and rotor. In the full cold state, the rotor thrust disk is generally close to the thrust tile to zero position. The direction of the generator is positive, and the negative is negative. The distance that the turbine rotor moves in the axial direction is called the axial displacement.