초록 ▼

Dynamically measuring the unbalance of a rotor arranged in a device housing (1) and rotating at high angular velocity, wherein the rotor is supported in a separate bearing housing (14), involves the following steps: fastening the bearing housing (14) on the device housing (1) with interposition of r

Dynamically measuring the unbalance of a rotor arranged in a device housing (1) and rotating at high angular velocity, wherein the rotor is supported in a separate bearing housing (14), involves the following steps: fastening the bearing housing (14) on the device housing (1) with interposition of resiliently yielding elements (6) so that the bearing housing (14) can be moved relative to the device housing (1) in at least two spatial dimensions and the rotor is arranged in a working position in the device housing (1) suitable for driving, accelerating the rotor, measuring the vibrations induced by unbalance while the rotor rotates at a substantially normal working speed, determining the phase position of the induced vibrations to the relative position of the rotor at the measuring speeds, and using the measured vibrations and the phase position to determine the unbalance of the rotor to be compensated.

대표청구항 ▼

The invention claimed is: 1. 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 resilientl

The invention claimed is: 1. 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. 2. Device for dynamically measuring the unbalance of a rotatable rotor supported in a bearing housing, said device comprising a device housing to which the rotor and the bearing housing can be attached in a working position suitable for driving the rotor at a substantially normal working speed, and said device further comprising a plurality of resiliently yielding elements by which the bearing housing can be attached to the device housing such that the bearing housing can be moved in at least two degrees of freedom of motion relative to the device housing, 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. 3. Device according to claim 2, wherein said resiliently yielding elements are each identical to one another. 4. Device according to claim 2, wherein the resiliently yielding elements are interconnected on a fastening face for the bearing housing by a bearing ring, and fixing elements adapted to fix the bearing housing are provided on the bearing ring. 5. Device according to claim 4, further comprising vibration sensors arranged on the bearing ring. 6. Device according to claim 4, further comprising an acceleration sensor arranged on the bearing ring. 7. Device according to claim 2. wherein the resiliently yielding elements each respectively have a shape of a ring sector with a radially internal sector portion, a radially external sector portion, and spring elements interconnecting the internal and external sector portions. 8. Device according to claim 7, wherein the resiliently yielding elements are each respectively fastened with the radially internal sector portion on the device housing and the radially external sector portion on the bearing housing or a bearing ring adapted to be connected to the bearing housing. 9. Device according to claim 7, wherein the spring elements interconnecting the internal and external sector portions are each respectively configured in an S-shape or a Z-shape. 10. Device according to claim 7, wherein the internal and external sector portions and the spring elements interconnecting the internal and external sector portions are manufactured in one piece. 11. Method for dynamically measuring the unbalance of a rotating rotor arranged in a device housing, the rotor being supported in a separate bearing housing and including a turbine wheel and a compressor wheel at opposite ends of the rotor, the method comprising the following steps: using a device housing having a central aperture and a spiral channel connected thereto, both of which are adapted to receive the turbine wheel of the rotor; fastening a bearing ring on the device housing with resiliently yielding elements interposed therebetween, the bearing ring having a central hole adapted to accommodate a ring flange provided on the bearing housing, and fixing elements adapted to fix the bearing housing on the bearing ring; installing the bearing housing in the device housing with the ring flange accommodated in the central hole and fixing the bearing housing to the bearing ring by the fixing elements such that the turbine wheel is arranged in a working position in the central aperture and in the spiral channel of the device housing suitable for driving the turbine wheel, and such that the bearing housing and the rotor have at least two degrees of freedom of motion relative to the device housing through the resiliently yielding elements; accelerating the rotor to a substantially normal working speed by directing an airflow through the spiral channel onto the turbine wheel; 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. 12. Device for dynamically measuring the unbalance of a rotatable rotor supported in a bearing housing, and including a turbine wheel and a compressor wheel at opposite ends of the rotor, the device comprising a device housing to which the rotor and the bearing housing can be attached in a working position suitable for driving the rotor at a substantially normal working speed, the device housing having a central aperture and a spiral channel connected thereto, both of which are adapted to receive the turbine wheel of the rotor and are configured and adapted to direct a spiraling airflow onto the turbine wheel, a bearing ring, having a central hole adapted to accommodate a ring flange provided on the bearing housing, and fixing elements adapted to fix the bearing housing on the bearing ring, and at least one resiliently yielding element, wherein the bearing ring is fastened on the device housing by the at least one resiliently yielding element interposed between the device housing and the bearing ring such that the bearing ring is movable in at least two degrees of freedom of motion relative to the device housing through the at least one resiliently yielding element. 13. Device according to claim 12, wherein the at least one resiliently yielding element comprises two spring rods on which the bearing ring is fastened so as to be attached to the device housing via the spring rods, the spring rods being arranged in a common plane parallel to a rotational axis of the rotor and extending in a direction of the rotational axis of the rotor. 14. Device according to claim 13, wherein the spring rods are arranged in a vertical plane and in a same region each have at least one bending portion of lesser stiffness whose stiffness is less in a horizontal direction than in a vertical direction.