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Shaft less open impleller suitable for micro pump

An open impeller and micro-pump technology, which is applied to components, pumps, and pump components of elastic fluid pumping devices, can solve the problems of unfavorable impeller outlet flow, more blood cell damage, and the existence of vortices, so as to reduce damage , Improve the flow structure and reduce the effect of mixing loss

Inactive Publication Date: 2008-01-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages are as follows: 1) the use of simple two-dimensional blades makes the flow in the pump complex, there are vortices, and the efficiency of the pump is low, and the destruction of blood cells is more; 2) the structure of the support frame connecting each blade is too simplified , is not conducive to the formation of a good impeller outlet flow

Method used

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  • Shaft less open impleller suitable for micro pump

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Embodiment Construction

[0009] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0010] Figure 1 is a schematic plan view of a shaftless open impeller of a micropump. The impeller includes a blade 1 and a support frame 3 for fixing the blade. The blades have a suction surface 2 and a pressure surface 4, which can be arc-shaped, helical, or quasi-helical. The inlet and outlet angles of the blades are generally 45° to 50°. The pressure surface of the blade forms an angle of 5° to 20° with the horizontal plane, and the optimal angle between the pressure surface of the blade and the horizontal plane is 12°, so that the blade is inclined to one side of the pressure surface 4 at a suitable angle; the upper end of the blade 6 It is a conical surface with a cone angle of 40°~60°, and the optimum angle is 55°; the number of impeller blades is generally 4 to 6. The ratio of the projected area of ​​all blades on the plan vi...

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Abstract

The shaft-less open impeller suitable for micro pump is one pollution-free and leak-less centrifugal mixed flow pump device suitable for continuous flow artificial heart. The impeller includes one vane combination and one vane holder, and the vane has pressure surface in the horizontal angle of 5-20 deg, conic upper end part of conic angle 40-60 deg, the ration between planar projection area of vane and outer circle area of the impeller of 0.4-0.8, and inlet angle and outlet angle of 45-50 deg. The impeller has effective inhibition of the secondary flow in the pressure surface of the vane, improved inside flow structure, reduced flow loss, small diameter and thus reduced damage to blood cell. The present invention may be also used in various kinds of centrifugal pump or mixed flow pump to improve the performance of the pumps.

Description

technical field [0001] The invention relates to a shaftless open impeller suitable for a micropump, and relates to a non-polluting and non-leakage centrifugal or mixed-flow pumping device suitable for a "continuous-flow artificial heart". Background technique [0002] In recent years, in view of the huge threat of cardiovascular diseases to human beings worldwide, it is very urgent to develop blood pumps that can meet the physiological requirements of the human body and have stable performance. In the existing heart pump and blood pump products, a dynamic pressure suspension heart pump using liquid buoyancy instead of a mechanical shaft or electromagnetic support has appeared, such as a dynamic pressure suspension heart pump disclosed in the invention patent CN 1372479A. Although this kind of heart pump has certain superiority in performance than other kinds of heart pumps, there are many defects in the design of its key hydraulic component—the impeller. The main disadvanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/24A61M1/12
Inventor 刘树红邵杰罗先武
Owner TSINGHUA UNIV
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