The "radial direction" is perpendicular to the "axial direction", that is, the radius or diameter direction of the cylinder end face circle. The radial direction is perpendicular to the axial space. This concept is also used when analyzing the force or motion of an object in physics.
brief introduction
Also called series axis, it is the displacement along the axis. The total displacement may not be on this axis, so we can decompose the displacement into two directions: parallel axis and vertical axis, and the displacement in the parallel axis direction is the axial displacement.
The axial displacement reflects the relative position of the rotating part and the stationary part of the steam turbine, and the change of axial displacement also changes the axial relative position of the stator and the rotor. Under normal circumstances, the rotor thrust disk is close to the zero position thrust pad in a completely cold state, which is positive for the generator and negative for the generator. The distance that the turbine rotor moves backward in the axial direction is called axial displacement.