Giw Industries, Inc.

Robert J Visintainer

Graeme R Addie

Peter Hergt

A bearing housing sealing system is provided for a centrifugal pump of the type having a rotating shaft supported by roller bearing elements, a housing for the roller bearing elements, the housing having a cylindrical entry for the passage of the pump shaft through the housing and isolating the roller bearing elements and a lubricant for the roller bearing elements. The bearing housing sealing system comprises an outer stationary cover that is attached about the cylindrical entry of the housing. The outer stationary cover includes a cylindrical opening for fitting around the pump shaft, and a raised portion extending outwardly from the housing and defining a casing having an inner volume. A flinger is positioned within the inner volume of the stationary cover and includes an outer face and an inner face. At least one set of vanes is formed either the outer face or the inner face. The flinger is further configured for attachment to the pump shaft for rotational movement with the shaft.

Bearing housing seal system for centrifugal pumps

A centrifugal slurry pump including a specifically designed impeller having circumferentially spaced vanes mounted between a back disc-shaped shroud and a front open annular shroud. The vanes are thick in cross-section for wear-resistance and channels between adjacent vanes permitting a relatively large spherical objects, such as rocks which are encountered during dredging operations, to pass therethrough, the objects having a diameter of in excess of 15 inches, while maintaining an efficiency in excess of 80% and a head in excess of 30 feet. The vanes further preferably have a mixed pitch and a negative overlap with quite large channels between adjacent vanes so as to pass the large spherical objects.

High capacity slurry pump

A centrifugal slurry pump is disclosed which includes a specifically designed impeller having three circumferentially spaced vanes mounted between a back disc shaped shroud and a front open annular shroud. The vanes are thick in cross-section for wear-resistance and channels formed between adjacent ones of the vanes permit a relatively large sphere, or sphere-like objects, to pass therethrough, the sphere having a diameter of in excess of 14 inches, while maintaining an efficiency in excess of 80% and a head in excess of 30 feet. The vanes have a mixed pitch and a negative overlap, with quite large channels formed between adjacent vanes so as to pass the large spheres which are encountered during dredging operations.

High capacity, large sphere passing, slurry pump

A high efficiency centrifugal slurry pump having satisfactory wear characteristics. The increased efficiency is obtained primarily through making the pump more narrow. Through careful control of the other pump dimensions, the increase in wear normally associated with higher efficiency narrow pumps can be reduced or eliminated.

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Augusta, GA, United States of America

Robert J Visintainer