Element for compressing or expanding a gas and method for controlling such element

A method for controlling an element for compressing or expanding a gas, the element (1) comprising:

• a rigid housing (2) containing an internal chamber;
• a rotor (3a, 3b) situated in the internal chamber and comprising a rotor shaft (4a, 4b);
• and
• one or more bearings (7) in which the rotor shaft (4a, 4b) of the rotor (3a, 3b) is bearing-supported, the rotor (3a, 3b) with its rotor shaft (4a, 4b) being rotatably mounted with respect to the housing (2) by means of these bearings (7),
• wherein the rotor (3a, 3b) is mounted with one or more clearances with respect to a wall (5) of the internal chamber,
• wherein
• the method comprises the step of acting upon at least one of the clearances by positionally adjusting a positionally adjustable part of a separate yielding component (10) of the element (1) with respect to the housing (2),
• wherein a fixed part of the separate yielding component (10) is held in a fixed or practically fixed position with respect to the housing (2), and
• wherein the separate yielding component is (10) is not directly attached to the rotor (3a, 3b).