Back to results
US 5,603,154 AGranted
Process for improving the run-in characteristics of drives having sintered bearings
AssigneeSiemens Aktiengesellschaft
InventorsHorst Steegmueller, Alfred Kuemmel
Life of this patent
Estimating the term…
Abstract
A process for improving the run-in characteristics of drives having sintered bearings. The drives are subject, prior to their operational usage in repeated cycles (I; II etc.), to a loading procedure exhibiting respectively a first load (M.sub.1), with the effect of operating of the sintered bearings in the mixed friction region (MR), and a following transition to a second load (M.sub.A, with the effect of operation of the sintered bearings in the boundary friction region (GR).
Claims8
A process for running-in sintered metal bearings of an induction motor drive prior to its placement in service, comprising:
- coupling the induction motor drive to an apparatus having a selectively variable torque load, prior placement of the motor in operational service;
- driving the selectively variable torque load with the drive through a predetermined loading cycle which includes repetitive respective steps of:
- setting the variable load torque to a first level which causes the bearings to be operated within a mixed friction lubrication mode, without consistent hydrodynamic lubrication;
- increasing the variable torque load to a second level which causes the bearings to be operated within a boundary friction lubrication mode;
- and
- intentionally terminating the loading cycle driving and removing the drive from the apparatus, so that the drive may be placed in service.
3 more elements
Dependencies are inferred from the claim text.