Accession Number : AD0476361


Title :   PROPELLER SHAFT THRUST BEARING ANALYSIS. PHASE 2


Corporate Author : GENERAL ELECTRIC CO SCHENECTADY NY


Personal Author(s) : Arwas, E B ; Sternlicht, B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/476361.pdf


Report Date : 01 Aug 1960


Pagination or Media Count : 116


Abstract : The need for greater accuracy in predicting the performance of tilting pad thrust bearings was previously discussed. Various performance calculation methods were described and it was shown that the load capacity of thrust bearing pads is significantly influenced by their elastic deflections, particularly in the case of centrally pivoted pads. An approximate method of calculating the pad deflections and including them in the film shape equation was worked and it formed the basis of the design charts and other calculation results given there. In the study which is reported here, a more complete analysis is made in which the elastic deflections of the pads are calculated from numerical solution of the Elasticity Equation. Deflections due both to load and to thermal gradients are calculated and, in each case, the actual pad geometry, including cut-outs and support ring is used in the computations. Finally, simple crowning of the pads is not assumed; instead, the more complex deflected shape of the pads is described by series expansions in r and theta, whose coefficients are calculated in each case to satisfy the minimum energy principle.


Descriptors :   *MARINE PROPELLERS , *THRUST BEARINGS , DEFLECTION , ELASTIC PROPERTIES , FILMS , FLUID FLOW , LOADS(FORCES) , LUBRICANTS , OILS , PERFORMANCE(ENGINEERING) , REYNOLDS NUMBER , TEMPERATURE


Subject Categories : Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE