Balancing Rotating Parts. A New Method and Device

Abstract

Rotating parts affected by an eccentricity create problems in a proper working of the entire ensemble that contains such parts. Since eccentricity, even if a very small one exists, it has to be compensated in order to ensure a smooth working of the part and ensemble it is mounted in. The paper presents a device that attached to a rotating part can balance it, so it rotates smoothly, without any runout. The principle the device is based on is adding a mass at the proper place on the eccentric part. The novelty of the device consists of that the mass of added material does not depend on the eccentricity of the part. It seeks its correct position on the rotating part moving its center of gravity towards the rotation axis along a certain trajectory until the balance is achieved. The trajectory is placed in a perpendicular plane to the rotation axis. Being an adjustable one, the device can be used to balance parts having different eccentricity or mass. Having a mobile centre of gravity, that is an own adjustable eccentricity strictly kept under control, the device can compensate the entire ensemble’s one. This concept removes the main disadvantage of the classical methods, which are much time consuming, caused of the repeating procedures. The device can be adjusted individually for each part, or for more parts in a batch, which are sorted in groups, to each group fitting a certain adjustment. Tuning and attaching the device to the eccentric part are very easy and safe.