No abstract

In this paper dealing with the tilting pad journal bearing, experimental results are presented which show that, at higher shaft speeds, the leading-edge-groove (LEG) design has significantly lower operating temperatures to those of the conventional design of tilting pad journal bearing. Subsequent theoretical analysis has shown that this reduction in pad operating temperature is the result of feeding cool oil directly to the leading edge of the pad. This has the effect of reducing the amount of hot oil carried over from one pad to the next.

No abstract

The paper outlines the design requirements and constantly arbitrary heat scale the change in the amount of heat increasing demandr, particularly in respect ofsurface speed, placed that it has been found necessary to dissipate from selfupon self-contained vertical bearings. TWO bpes of bearing in contained verticals. Overall from these figures, it has present-doy use are desuibed and the limitationr, inherent in been concluded that the requirement is for self-contained bearings to cover the 4 pole speed in the immediate design, upon performance discussed.future while making provision for 2 pole speeds. Overall Test work on several sizes of bearing is described and compari-sizes need to be kept as low as possible, while at the same sons made. Data on babbitt temperature are given and, following time dissipating considerably more heat than in the past. discussion as to the limits to be placed upon babbitt temperature Two basic designs of vertical thrust bearings are in and stress as well as comparison between theoretical prediction and current usage, these being shown in ~i~. 2. ~~~h comprise measured values, graphs to a load and speed bask are given of a thrust collar secured to the rotating shaft, thrust showing the present limits of operation of these bearings.

This paper presents results from a study of thermal and elastic effects in the tilting pad journal bearing. The analysis considers thermal and elastic distortions of the pad, thermal growth of the bearing components, and cross-film variations of lubricant viscosity. The computer model is verified against steady-state experimental data gathered from a five-shoe bearing. Calculations indicate that significant changes in bearing and pad clearances may occur as a result of pad, shaft and housing distortions. In some cases, this may lead to an operational preload which is substantially different from that called for in the initial design.