METHOD OF AND CENTRIFUGAL HYDRAULIC PUMP FOR DELIVERING LIQUID Russian patent published in 1998 - IPC

FIELD: heat supply systems. SUBSTANCE: hydraulic pump is built into straight-line section of pipeline, and flow in contraction suction line is turned through 90 degrees with transportation of liquid flow from cone-shaped into narrowing torus-like section. Uniform distribution of liquid velocities before wheel is provided by accelerating the layers farthest from center of torus and braking the layers which are not for from center of torus by starting-line orientation of the first ones and curvilinear orientation of the second ones with one-side plane action at inlet and proportional braking of all layers at outlet. When building pressure head in diffuser delivery line, flow is accelerated by two-side plane action with simultaneous braking of its axial rotation. To provide uniform velocities over entire path of flow from inlet in pipeline to outlet from pump, contraction inlet branch pipe 8 of pump is made torus-shaped and is provided with flat 11 tilted through angle of 30 degrees relative to wheel axis, and different-height bead 12 forming inlet hole 7 of spiral channel is provided in its outlet portion. Diffuser outlet branch pipe 10 in delivery line is provided with two opposite flats 13 and 14 symmetrically tilted relative to plane of wheel 3. EFFECT: enlarged operating capabilities. 3 cl, 6 dwg