Low-Turbulence Impeller for a Fluid Pump

摘要

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.

主权项

1. A low-turbulence impeller for a fluid pump, the low-turbulence impeller comprising:
a first base wall having
a first inner surface; anda first periphery; a second base wall spaced apart from the first base wall and having
a second inner surface facing the first inner surface;a second periphery; andan inlet formed through the second base wall; multiple guiding blades connected to the first inner surface and the second inner surface, the guiding blades being curved and spaced apart from each other; each one of the guiding blades having
an inner end;an outer end disposed opposite to the inner end;a first blade surface; anda second blade surface disposed opposite to the first blade surface; multiple back-up plates mounted on the first periphery of the first base wall and the second periphery of the second base wall, and annularly spaced apart from each other; each one of the back-up plates connected to the outer end of a corresponding guiding blade; and multiple runners, each one of the runners formed between two adjacent guiding blades and two adjacent back-up plates connected to said two adjacent guiding blades, and each one of the runners having
an outlet formed between said two adjacent back-up plates;a laminar zone being near the first blade surface of one of the two adjacent guiding blades and communicating with the outlet of the runner; anda turbulent zone being near the second blade surface of the other guiding blade and aligning with the corresponding back-up plate.