Hydrodynamic float vane type microminiature pump

Abstract

The invention relates to a hydrodynamic float vane type microminiature pump, in particular to a vane type microminiature pump with no external mechanical axis, no leakage or with fluid in no contact with the external world. The invention has the technical characteristics that a main pump impeller and an electric machine rotor are integrated as a whole; auxiliary impellers are arranged at the two ends of the electric machine rotor and are symmetrically distributed with respect to the main impeller; a hydrodynamic suspension bearing is formed by the vane tops of both first and second auxiliary impellers and the corresponding inner walls of pump shells, which can realize suspended propping separately or by combining a magnetic suspension bearing. The invention can effectively form symmetrical, even and smooth flow conditions in the inner chamber of the pump shell, thus improving the hydraulic efficiency of the pump and the controllability of the flow design and further decreasing the structural size of the microminiature pumps.

Description

technical field [0001] The invention relates to a vane-type micro-pump, in particular to a vane-type micro-pump suitable for no external mechanical shaft, no fluid leakage or no contact between the fluid and the outside of the pump. The invention can be applied to single-phase or multi-phase fluid delivery devices in fields such as extracorporeal blood circulation devices, artificial hearts, fine chemicals, and biopharmaceuticals. Background technique [0002] According to the support structure of the impeller, the vane-type micro-pumps currently used are mainly divided into two categories: one is the form of an external mechanical shaft, and the other is the form of magnetic suspension. For vane-type micro-pumps with external mechanical shafts, due to the use of mechanical seals or other shaft sealing devices, the fluid in the pump cannot be completely isolated from the outside of the pump, and cannot effectively prevent fluid leakage or contact between the fluid in the pum...

AI Technical Summary

Problems solved by technology

For vane-type micro-pumps with an external mechanical shaft, due to the use of mechanical seals or other shaft seal devices, the fluid in the pump cannot be completely isolated from the outside of the pump, and cannot effectively prevent fluid leakage or contact between the fluid in the pump and the outside world; The vane-type micro-pump using magnetic levitation can solve the problems of fluid leakage and contact between the fluid in the pump and the outside world, but it is easy to form a stagnation zone on the rear cover side of the pump impeller.

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