A centrifugal pump including a stationary guide vane secured to a casing, and a centrifugal impeller arranged for rotation in the casing in a position adjacent the stationary guide vane. MULTI-FUNCTIONAL WATER PUMP CONTROL VALVEThe centrifugal impeller has at least one blade wound in convolutions on a peripheral surface of a hub and having a blade inlet surface substantially perpendicular to the axis of rotation of the impeller and a fluid flow entrance surface substantially parallel to the blade inlet surface. Water Control valves The blade is wound in a suitable number of convolutions extending from an inlet to an outlet on the hub and is forwardly inclined toward the axis of rotation of the impeller at an increasingly greater angle in going from the inlet toward the outlet, so as to produce centrifugal forces at the outlet.Forged Steel Valves The centrifugal impeller has a high head which has been beyond the power of axial impellers to achieve.

The invention has as its object the provision of a centrifugal pump comprising a centrifugal impeller which, although its inlet is substantially similar in configuration to that of an axial impeller, has the high head.

According to the invention, there is provided a centrifugal pump comprising a casing, a stationary guide vane secured to the casing, and a centrifugal impeller arranged for rotation in the casing in a position adjacent the stationary guide vane, said centrifugal impeller including a hub in the form of frusto-cone and at least one blade wound in convolutions on a peripheral surface of the hub and having a blade inlet surface substantially perpendicular to the axis of rotation of the impeller and a fluid flow entrance surface substantially parallel to said blade inlet surface, said blade being wound in a suitable number of convolutions extending from an inlet to an outlet on the hub and being forwardly inclined toward the axis of rotation of the impeller at an increasingly greater angle in going from the inlet toward the outlet so as to generate centrifugal forces at the outlet, the angle of inclination of the blade with respect to the axis of rotation of the impeller being arbitrarily selected from the range between 0 and 90 degrees.

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2011-12-20

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