초록 ▼

An electric-motor liquid fuel turbine pump wherein the pump impeller periphery has a circumferential array of axial counter flow blades arranged in radially spaced outer and inner concentric circular rows. An arcuate pumping channel includes first and second channel section arcuate grooves axially o

An electric-motor liquid fuel turbine pump wherein the pump impeller periphery has a circumferential array of axial counter flow blades arranged in radially spaced outer and inner concentric circular rows. An arcuate pumping channel includes first and second channel section arcuate grooves axially opposed in side-flanking relationship to the impeller and radially co-extensive with both blade rows to conjointly define a toroidal helical flow path extending circumferentially between the pumping channel inlet and outlet ports. The grooves have a constant radial cross section but the first groove cross sectional area is greater than that of the second groove. The impeller may be a one-piece molded part, or a two-part subassembly of an inner impeller disc and encircling outer impeller ring each having a row of blades formed at its periphery. A pump inlet cap has a top face defining one side plate for the impeller and the first channel groove communicating at one end with the channel inlet. A pump outlet cap has a bottom face defining the other side plate for the impeller and the second channel groove communicating at one end with the channel outlet. A guide ring is sandwiched between the caps and encircles the outer row of impeller blades.

대표청구항 ▼

An electric-motor fluid pump that comprises: a housing including a liquid inlet and a fluid outlet, an electric-motor including a rotor and means for applying electrical energy to said motor to rotate said rotor within said housing; and pump means including an impeller coupled to said motor for co-r

An electric-motor fluid pump that comprises: a housing including a liquid inlet and a fluid outlet, an electric-motor including a rotor and means for applying electrical energy to said motor to rotate said rotor within said housing; and pump means including an impeller coupled to said motor for co-rotation therewith and having a periphery with a circumferential array of blades arranged in radially outer and inner circular rows concentric with the rotational axis of said impeller, and means forming an arcuate pumping channel surrounding at least a portion of said impeller periphery and communicating at circumferentially opposite first and second ends respectively with said housing inlet and outlet, said pumping channel means including first and second channel section arcuate grooves in said channel means oriented in mutually facing, axially opposed relationship to one another and in side-flanking relationship to said portion of said impeller periphery, said channel grooves extending radially of said impeller co-extensively with said blade rows and communicating axially therewith to define therewith a toroidal fluid flow path extending circumferentially of said impeller between said ends of said pumping channel.