Centrifugal pump for liquids
A centrifugal pump is provided for transporting pressurized liquids containing solid particles. The pump housing defines a first cylindrical-shaped interior cavity and a second frustoconical interior cavity axially interconnecting the fluid inlet to the pump and the first interior cavity. An impeller includes a plurality of vanes each having a first portion positioned within the first cavity and having an outward axially extending edge spaced uniformly from the central axis of the pump. Each of the vanes includes a second portion positioned within the second cavity and having an outward axially extending edge spaced from the central axis a variable distance directly proportional to its axial spacing from the fluid inlet. The edge of each of the vanes is spaced a preselected distance of at least one quarter inch from the side walls of the housing, such that each of the vanes remains out of sealing engagement with the housing. The pump is not susceptible to plugging, jamming, or excessive repair caused by the solid materials in the liquid, and a relatively low horse power motor can efficiently pump fluids at a comparatively high pressure. A centrifugal pump suitable for pumping a liquid having solid material carried in suspension therein, the pump including an impeller rotatable about a central pump axis and having a plurality of vanes, powered drive means for rotating the impeller about the central pump axis, and a pump housing defining a fluid inlet positioned along the central axis and a fluid outlet, the pump further comprising: the pump housing defining a first substantially cylindrical-shaped interior cavity of a fixed diameter and in fluid communication with the fluid outlet; the pump housing further defining a second frustoconical cavity axially interconnecting the fluid inlet and the first interior cavity, the second cavity having an axial length of at least one-third the fixed diameter of the first cavity; each of the plurality of vanes having a first portion positioned within the first cavity and having an outward axially extending edge spaced substantially uniformly from the central pump axis: each of the plurality of vanes further having a second portion within the second cavity and having an outward axially extending edge spaced from the central pump axis a variable distance directly proportional to its spacing from the fluid inlet; and the edge of the first and second portions of each of the plurality of vanes spaced radially a distance from the pump housing, such that a substantial preselected clearance of at least one-quarter inch exists between the radially outward edge of each of the vanes and a corresponding interior surface of the pump housing.
Shanghai Kaida Pump Mfg. Co., Ltd.