What is an axial force, and in which direction does it point?
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During the operation of the compressor, its axial force increases as the outlet pressure rises; the axial thrust on the rotor at startup is in the opposite direction to that during normal operation.
All centrifugal equipment features axial feeding and tangential discharging; due to the movement of the material and pressure differences, the shaft of the motor experiences axial stress, which can even lead to misalignment. The above is my understanding; confirmation from those familiar with compressors is needed
"During the operation of the compressor, its axial force increases as the outlet pressure rises; the axial thrust on the rotor at startup is in the opposite direction to that during normal operation. Yes, there’s no problem with that.
When the equipment is in operation, a force acts on the axis, and the equipment needs to be balanced; this can be achieved by using bearings or by designing appropriate mechanisms