Soft-mount washer extractor with unbalance compensator system

Centrifugal machine with a suspended floating group and an overhanging drum, such as a washing-centrifugal machines designed to high centrifugal speeds with high G factors, in which said suspended floating group comprises:

• a wrapping bin (10) to contain and/or to collect a bath;
• a drum (20) having bored walls for a load of material to be centrifuged (Q) mounted so that it can rotate within said wrapping bin (10);
• a motor (32) fixed on the bin (10) and connected to said drum (20) to rotate it, said drum (20) being provided at one of its ends with a driving shaft (16) aligned with a centre line (M) supported and guided by bearings (A, B) housed within a bearing box (30) fixed on the wrapping bin (10) and in which when it rotates it creates by an effect of unbalanced masses produced by said load of material to be centrifuged (Q), an actual rotation axis (N) different from said centre line (M), separate from each other by a distance corresponding to an amplitude (XD) of dynamic shift;
• an equilibrating counterweigh (40) of a predetermined mass (mCE) associated to a part of said wrapping bin (10) distal from the bearings (A, B), and
• an equilibrating counterweigh (42) having a predetermined mass (mCT) associated to a part of said drum (20) distal from the bearings (A, B), characterized in that:
• more than a half of the total mass of said counterweighs (40 and 42), resulting from adding to their respective masses (mCE and mCT), is concentrated on the counterweigh (42) associated to the drum (20), said mass (mCT) of the counterweigh (42) being either of a given magnitude (mPE) and centred with said centre line (M) of the drum (20) or of a lower magnitude (mA) and in the form of one or more fluid rings (60) which, when said drum rotates at a speed such that said drum produces a G factor over 1 and over the floating group resonance frequency, said drum remains misaligned at a higher distance than said amplitude (XD) of dynamic shift producing dynamic effects equivalent to those of said given magnitude (mPE), so that the structural stresses the floating group sustains are substantially reduced, and because:
• several parts of said floating group, such as the wrapping bin (10), the drum (20), said bearing box (30), the bearings (A, B) and said driving shaft (16), are constructed with mechanical strength requirements as for the shape, materials or components, lower with respect to those which would be necessary if said more than a half of the total mass of said counterweighs (40 and 42) would be concentrated in the counterweigh (40) associated to the wrapping bin (10).