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Super small centrifugal pump impeller

A centrifugal pump impeller, ultra-small technology, applied in the field of circulating pump, ultra-small centrifugal pump impeller, centrifugal pump impeller, can solve the problems of the overall efficiency of the impeller machinery

Inactive Publication Date: 2010-01-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because according to the traditional design theory, as the scale decreases, the centrifugal force and inertial force inside the impeller weakens (that is, the Reynolds number decreases), while the influence of other factors (such as friction, etc.) will increase accordingly, resulting in impeller machinery. Overall efficiency drops

Method used

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  • Super small centrifugal pump impeller
  • Super small centrifugal pump impeller
  • Super small centrifugal pump impeller

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Experimental program
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Embodiment Construction

[0013] The specific structure of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] figure 1 , figure 2 Schematic diagram of the impeller structure. The impeller includes a hub 2 and blades 1 fixed on the hub. An impeller shaft hole 3 is provided at the center of the hub.

[0015] image 3 Schematic diagram of the airfoil of the impeller blade. At the inlet of the blade 1, the angle between the tangent direction of its bone line and the tangential direction of the circumference at this radius (opposite to the direction of impeller rotation) is β b1 , that is, the import placement angle. At the outlet of the blade 1, the angle between the tangent direction of its bone line and the tangential direction of the circumference at this radius (opposite to the direction of impeller rotation) is β b2 , that is, the exit placement angle.

[0016] Figure 4 is the velocity triangle at the inlet of the impeller blade. w...

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Abstract

The present invention relates to the structure design of superminiature centrifugal pump impeller of diameter 5-50mm. The design adopts new concept to raise the hydraulic performance of pump. Technologically, the impeller has the ratio between the exit area and the entrance area in 0.9-1.0, vane entrance attack angle of 10-30 deg, exit setting angle of 30-55 deg, vane number of 5-11, and vane entrance extending toward the pump entrance until the cross line between the hub and the vane is converted into axial point. Experiment shows the pump has inner flow characteristic and outer performance superior to traditional impeller. The present invention may be used as blood pump, circulating pump in small fuel cell cooling system, etc.

Description

technical field [0001] The invention relates to a centrifugal pump impeller, in particular to an ultra-small centrifugal pump impeller whose impeller diameter is between 5mm and 50mm, which can be widely used for example in blood pumps for extracorporeal circulation of blood in thoracic surgery and small fuel cell cooling systems The circulation pump etc. in the invention belong to the technical field of miniature pumps. Background technique [0002] In view of the increasingly prominent environmental problems, in order to use energy efficiently, the development of small and micro electromechanical technology has become a very important development direction, and pumps are no exception, and the impeller is the key to the technology. [0003] For blood pumps with smaller size requirements, circulation pumps in small fuel cell pump cooling systems, etc., although people hope that the pumps will be lighter in weight and smaller in size, the diameters of the existing pump impell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/24A61M1/10
Inventor 刘树红罗先武
Owner TSINGHUA UNIV