CALCULATION METHOD FOR RECOVERY OF SHAFT OF CENTRIFUGAL PUMPS WORN IN THE PACKINGS AREA

Abstract

This paper develops a method for the recovery of shaft of centrifugal pumps worn area packings. The procedure was applied to the recovery pump aluminum sulfate used in the process of demineralization of water in ¨Carlos M. de Céspedes¨ Thermoelectric Plant of Cienfuegos. This equipment was damaged due to wear on the product shaft more than two decades of operation. To this end a new scheme for the Analysis of shaft packings considered as additional elastic supports is used. Using this scheme the reaction on shaft packing is calculated. Processing the results of the literature for soft packings equation correlation between the coefficient of kinetic friction and the shaft, which enabled calculation of the moment of friction, find the minimum pressure between the sleeve and the shaft so it does not slide was obtained. Dimensions and material of the sleeve is first found the maximum pressure setting selected and verified that it can be carried by the cap. Reduced resistance for the placement of sleeve and found to be burdened evaluated shaft