Low-Turbulence Impeller for a Fluid Pump

Abstract

A low-turbulence impeller for a fluid pump comprises a first base wall, a second base wall, multiple guiding blades, multiple back-up plates, and multiple runners. The second base wall has an inlet formed through the second base wall. Each one of the runners is formed between two adjacent guiding blades. Each runner has an outlet formed between two adjacent back-up plates. Each runner has a laminar zone communicating with a corresponding outlet and a turbulent zone aligning with the corresponding back-up plate. The fluid can only be flowed out of the outlet from the laminar zone, such that the fluid through the outlet of each runner is in low-turbulence condition. The phenomenon of inverse flow caused by negative pressures and the cavitation corrosion is greatly reduced. The rotational velocity of the low-turbulence impeller is enhanced to promote the fluid-draining efficiency.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a pump impeller, especially a low-turbulence impeller for a centrifugal fluid pump.[0003]2. Description of the Prior Arts[0004]With reference to FIGS. 8 and 9, a conventional centrifugal pump impeller 1 has a first base wall 11, a second base wall 12 spaced apart from the first base wall 11, multiple blades 13 mounted between the first base wall 11 and the second base wall 12, and multiple runners 14. The second base wall 12 has an inlet 121 formed in a center of the second base wall 12. The blades 13 are curved and are spaced apart from each other. Each blade 13 has a first blade surface 131 and a second blade surface 132. Each one of the runners 14 is formed between a first blade surface 131 and a second blade surface 132 of two adjacent blades 13 for the flowing of fluid. A width of each blade 13 is constant. A width of each runner 14 is gradually increased from an interior to a perip...

AI Technical Summary

Benefits of technology

[0007]The main objective of the present invention is to provide a low-turbulence impeller for a fluid pump that can eliminate cavitation corrosion of the fluid to reduce energy consumption and promote fluid-draining efficiency.

Problems solved by technology

Thus, the fluid will flow inversely due to negative pressures produced by the vortexes V. Further, cavitation corrosion of the fluid easily occurs and damages the blades 13.

When the rotational velocity of the pump impeller 1 is increased, the cavitation corrosion might be more severe.

As the conventional pump impeller 1 could not increase the rotational velocity in operating condition, the fluid-draining efficiency of the pump impeller 1 is insufficient.

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