An Improved Short Bearing Analysis for the Submerged Operation of Plain Journal Bearings and Squeeze-Film Dampers

Author:

Pan C. H. T.1

Affiliation:

1. Shaker Research Corporation, Ballston Lake, N. Y. 12019

Abstract

By allowing the film pressure to assume some subambient value and by allowing natural boundaries of the film to form in the unloaded region, the short-bearing theory of Ocvirk and Dubois is extended to include a detailed description of the cavitation zone. Two alternative cavitation configurations are shown to be possible, rendering different eccentricity (orbit size), attitude angle (phase), for the same load and minimum film pressure. The first configuration features an enclosed cavity maintained at a subambient level and is called “0” cavitation, which is crudely emulated by the conventional “half-film” approximation. The second configuration features ambient level side cavities, the boundaries of which are drawn inside the bearing ends by a sub-cavity film pressure, and is called “I” cavitation. The “I” cavitation, which is initiated by the aggregation of entrained bubbles in the ambient fluid, can present itself in the form of multiple striations causing substantial loss of load capacity.

Publisher

ASME International

Cited by 12 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Fluid Cavitation Intensity in Zero Leakage Upstream Pumping Face Seals with Spiral Grooves;International Journal of Applied Mechanics;2023-09-25

2. Reverse Flow in Submerged Journal Bearings;Tribology Transactions;2023-01-02

3. A simple expression for fluid inertia force acting on micro-plates undergoing squeeze film damping;Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences;2010-09-29

4. On Squeeze Film Damping in Microsystems;Journal of Tribology;2010-06-04

5. Reverse Flow as a Possible Mechanism for Cavitation Pressure Build-up in a Submerged Journal Bearing;Journal of Tribology;2001-07-03

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