Front diversing flow rotor structure with tapping splitter blades for artificial heart blood pump

A shunt blade, artificial heart technology, applied in medical science, prosthesis, etc., can solve the problems of high shear stress, high rotor speed, easy to cause hemolysis, etc., to achieve smooth flow and reduce shear effect.

Inactive Publication Date: 2010-09-08
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0006] The rotor part of the general impeller-type axial flow blood pump adopts a relatively single rotor blade design. The problems caused by this design are: under the condition of supply blood pressure increase required by medical needs, the rotor speed is too high and the shear stress is too large. lead to hemolysis

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  • Front diversing flow rotor structure with tapping splitter blades for artificial heart blood pump
  • Front diversing flow rotor structure with tapping splitter blades for artificial heart blood pump
  • Front diversing flow rotor structure with tapping splitter blades for artificial heart blood pump

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Embodiment Construction

[0045] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0046] A front guide rotor structure with splitter vanes of an artificial heart blood pump, the structure specifically includes a rotor hub flow channel and rotor blades:

[0047] 1. The flow channel of the rotor hub adopts a gradually shrinking structure, such as Figure 4a As shown in number 10, a streamlined cubic spline curve is used to define the hub runner. This streamlined flow channel has a certain effect on raising the blood pressure by means of the centrifugal force, and adopts a gradual transition method to make the centrifugal force boosting effect and the blade circulation change boosting effect form a good match in the entire channel, which also prevents In order to avoid the sudden increase of pressure, the axial range of cubic spline streamlined rotor hub is as follows Figure 4a As shown in label 14, the meridional coordinat...

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Abstract

The invention relates to a front diversing flow rotor structure with tapping splitter blades for an artificial heart blood pump, comprising a rotor hub passageway and rotor blades, wherein the rotor hub passageway adopts a gradual contraction structure; a streamline cubic spline curve is used to define the hub passageway; and the rotor blades are composed of two overall large blades and two small splitter blades; and the overall large blades adopt a two-section blade-type structure design at a root part and a tip part respectively. The circumferential position structure of the rotor blades is as follows: the small splitter blades are located at 47% of a circumferential angle between the two overall large blades. After adopting the rotor structure, the blood-supply and pressure rising capability of the rotor is strengthened, the tangential velocity of a rotor blade tip and the shearing action of the rotor blades on blood are reduced, and the internal flow of the rotor is smooth without flow separation.

Description

technical field [0001] The invention relates to a front guide rotor structure with splitter vanes of an artificial heart blood pump, which belongs to the technical field of comprehensive impeller machinery technology and medical technology. Background technique [0002] Heart failure is a late stage in the development of various heart diseases, directly threatening the lives of more and more patients. The current treatment methods for heart failure mainly include: drug therapy, surgery, mechanically assisted circulation, heart transplantation, cell transplantation and so on. Drug treatment accounts for the vast majority of them, but when the condition is serious, or even when the heart function is lost, heart transplantation must be taken for treatment. However, the treatment method of heart transplantation has great limitations, mainly because the number of healthy hearts used for transplantation is small and it is difficult to obtain in time, and rejection and opportunist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/10
Inventor 桂幸民孙晓峰金东海杨晓琛
Owner BEIHANG UNIV
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