Published: Jan 1992
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Erosion wear of centrifugal slurry pumps is traditionally attributed to two different mechanisms, particle impact and scouring, which occurs as a result of a sliding bed of particles scratching against the wear surface. The impact and sliding wear coefficients (energy consumed per unit volume of material removed) are usually determined by separately simulating the two processes of wear in laboratory test equipment.
Although such simulations yield acceptable relative wear indexes for ranking wear resistance of materials, they fail to yield reasonable absolute values of wear coefficients when compared with actual measurements of wear on a pump. Possible reasons for this lack of agreement are proposed, and an alternative approach is presented to determine the absolute wear coefficients. This approach involves the finite element analysis of two-phase flow within the pump casing coupled with wear measurements on an actual pump casing. Test results for the simulated laboratory tests and the actual pump test are presented and discussed.
wear testing, slurry pumps, centrifugal pumps, finite-element analysis
Technical consultant, GIW Industries, Inc., Grovetown, GA
Mechanical engineer, Westinghouse, Inc.,