Influence of Journal Speed and Load on the Static Operating Characteristics of a Tilting-Pad Journal Bearing with Ball-and-Socket Pivots

Authors: Brechting, Bob¹; Flack, Ron²; Cloud, Hunter²; Barrett, Lloyd²; He, Minhui³

Source: Tribology Transactions, Volume 48, Number 3, July-September 2005 , pp. 283-288(6)

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Abstract:

Results are described for experiments aimed at determining the effects of increased speed and load on ball-and-socket pivots in tilting-pad journal bearings. Experimental measurements of journal static operating position were made for a 70-mm (2.75-in.), five-pad tilting-pad journal bearing with ball-and-socket pivots. Testing consisted of journal rotational speeds from 1650 to 7840 rpm and bearing static loads as high as 4.45 kN (1000 lbs). These speeds and loads were sufficient to attain a range of heat generation and pivot thermal growths. Results showed that at low speeds substantial cross-coupling effects were present. However, with increased heat generation at elevated speeds and loads, these cross-coupling effects were significantly reduced.

Keywords: Fluid-Film Bearings; Journal; Tilting Pad

Document Type: Research article

DOI: http://dx.doi.org/10.1080/05698190590965477

Affiliations: 1: BP&R Engineering, Inc. Holland, Michigan, USA 2: Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, USA 3: BRG Machinery Consulting Charlottesville, Virginia, USA

Publication date: 2005-07-01