Parametric studies on modified configurations of ball-type passive balancers for improved transient and steadystate responses. (13th October 2018)

• Record Type: Journal Article
• Authors: Haidar, Ahmad M.; Palacios, Jose L.
• Is Part Of: Journal of sound and vibration. Volume 432(2018)
• Page Start: 633
• Page End: 652
• Publication Date: 2018-10-13
• Subjects: Passive balancing -- Vibration control -- Structural dynamics -- Rotordynamics; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2018.06.057
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: A passive balancing device is a bearing with a set of masses that are free to move about a shaft axis of rotation. Beyond the first critical speed of the shaft, the masses assume positions that reduce vibrations due to imbalance. The conventional design of passive balancers is a dual-ball bearing. This type of balancer only performs its function at supercritical speeds and when the ball/track contact is nearly frictionless. In this work, additional experimental verification of a previously formulated mathematical model is conducted using published experimental data. The model was then used to investigate passive balancing performance numerically. Conventional and non-conventional bearing configurations were tested with consideration of rolling resistance and ball collisions. Results suggest that when rolling resistance is considered, a 1-track bearing configuration with any number of balls yields better performance than multi-track bearings. The 1-track configuration improved performance by 57% when compared to a 3-track configuration at supercritical steadystate. It is also shown that a multi-partition balancer improves performance significantly during shaft speed up – 69% improvement compared to a balancer without partitions. With configuration adjustments, the bearing remains entirely passive while vibration suppression performance is improved.