Abstract: A device includes a rotor (5), a stator (2) and different types of liquid pocket sliders (3; 4; 10), each type with different and specific functions, the liquid pocket sliders preferably being mounted at the outermost surface of the rotor. The device can include ordinary pocket sliders (3), with the function of load support and bearing self-centering on the rotor (5); “sentinel” pocket sliders (4) having the function of predicting failures and/or monitoring the distribution of the load around the rotor; preload pocket sliders (10), with the function of compensating for possible unbalance of the rotor at a given velocity.