Patent ID: 8899111

Claim:
A device for measuring forces generated by an unbalance of a rotating rotor, said device comprising: a stationary frame; a first bearing; a measuring shaft mounted rotatably about its shaft axis in the first bearing; a mount provided on the measuring shaft designed for attachment of the rotor, wherein the rotor is designed to be balanced in at least one compensating plane; a second bearing pivotally supporting the first bearing about a pivot axis which intersects the shaft axis and being supported on the stationary frame; a first force sensor for measuring forces generated by the unbalance of the rotating rotor and acting on the measuring shaft about the pivot axis; and a second force sensor for measuring forces generated by the unbalance of the rotating rotor and acting on the measuring shaft and on the second bearing in a direction intersecting the shaft axis; and a first spring provided between the first bearing and the second bearing, the first spring including one or ore torsion springs.