Patent ID: 7654138

Claim:
Method for dynamically measuring the unbalance of a rotating rotor arranged in a device housing, the rotor being supported in a separate bearing housing, comprising the following steps: fastening the bearing housing on the device housing with interposition of resiliently yielding elements such that the bearing housing has at least two degrees of freedom of motion relative to the device housing and the rotor is arranged in a working position in the device housing suitable for driving, wherein said resiliently yielding elements are resiliently yielding in axial and radial directions, and are arranged on the device housing concentrically to a rotational axis of the rotor and with uniform spacing around a periphery, accelerating the rotor to a substantially normal working speed, measuring vibrations induced by an unbalance of the rotor while the rotor rotates at least one measuring speed corresponding to the substantially normal working speed, determining a phase position of the vibrations induced by the unbalance with respect to an angular position of the rotor at the at least one measuring speed at which the vibrations induced by the unbalance are measured, and using the measured vibrations induced by the unbalance and using the phase position to determine the unbalance of the rotor to be compensated.