초록 ▼

A centrifugal pump for pumping slurries and other abrasive liquids having an axial inlet and a circumferential outlet, an impeller rotating within a housing and a suction liner secured to the housing wherein the impeller has a radial nose projecting toward the suction liner, a wear ring providing a

A centrifugal pump for pumping slurries and other abrasive liquids having an axial inlet and a circumferential outlet, an impeller rotating within a housing and a suction liner secured to the housing wherein the impeller has a radial nose projecting toward the suction liner, a wear ring providing a complementary confronting surface axially spaced from said impeller and positioned as a part of a spool piece within the suction liner. The spool piece also includes a control means connected to the wear ring to move the wear ring surface axially toward and away from the impeller nose to maintain a preselected clearance therebetween to offset the abrasive wear occurring due to the pumping of the slurry.

대표청구항 ▼

A centrifugal pump having a housing provided with an axis, an impeller rotatably disposed within said housing for rotation about said axis, said housing having a suction inlet along said axis and a discharge radially outwardly of said inlet, wherein the improvement comprises: (a) said impeller being

A centrifugal pump having a housing provided with an axis, an impeller rotatably disposed within said housing for rotation about said axis, said housing having a suction inlet along said axis and a discharge radially outwardly of said inlet, wherein the improvement comprises: (a) said impeller being provided with first circular surface adjacent to said inlet; (b) a cylindrical wear ring having, at its inner end, a second circular surface conforming to and abutting said first circular surface; (c) a hollow tubular wear ring holder receiving, in the inner end portion thereof, the outer end portion of said wear ring for holding said wear ring for movement with said wear ring holder, said wear ring holder being telescopically received within the inlet of said housing for movement axially toward and away from said impeller; and (d) control means connected to said wear ring holder for incrementally moving said wear ring holder toward and away from said impeller.