An implantable axial flow blood pump based on blood flow pressure and pivot support
An axial flow, flow pressure technology, applied in blood pumps, hypodermic injection devices, suction devices, etc., can solve the problems of the complex structure of the magnetic suspension bearing system, the difficulty in miniaturizing the blood pump, and the large volume and size, so as to reduce thrombosis and Probability of hemolysis, simple structure, small size effect
Inactive Publication Date: 2017-11-17
WUHAN UNIV OF TECH
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Problems solved by technology
Most of the existing axial flow blood pumps use sliding bearings or magnetic suspension bearings. The sliding bearings have relatively large mechanical friction, which can easily cause damage to red blood cells, which in turn leads to problems such as thrombosis and hemolysis. Large, it is difficult to meet the design requirements of miniaturization of blood pumps
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[0022] The present invention provides an implantable axial-flow blood pump based on blood flow pressure and Pivot support. The two ends of the rotor are supported by pivot jewel bearings to reduce mechanical friction, and the gap between the impeller and the inner cavity wall Utilizing the fluid characteristics of the blood itself, it provides radial dynamic pressure auxiliary support for the rotor, and then reduces the load on the bearings at both ends; through the high-speed rotation of the rotor, blood flow pressure is formed in the gap between the blade and the inner cavity, providing radial auxiliary support for the bearing, Effectively reduces mechanical friction.
[0023] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited.
[0024] The implantable axial-flow blood pump based on blood flow pressure and Pivot support provided by the present invention adopts an axial-...
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The invention discloses an implantable axial-flow type blood pump based on blood flowing pressure and Pivot supporting. The implantable axial-flow type blood pump based on the blood flowing pressure and Pivot supporting is characterized in that a through cavity is formed in a pump body, an axial-flow impeller composed of a front guide wheel (2), an impeller (4) and a rear guide wheel (6) is arranged in the through cavity, the impeller is arranged on a rotor, the two ends of the impeller are respectively connected with the front guide wheel and the rear guide wheel by virtue of a pivot jewel bearing, blood flowing pressure produced between the high-speed rotating impeller and the inner wall of the through cavity is utilized for providing radial auxiliary supporting for the rotor, and the front guide wheel and the rear guide wheel are fixed and static. Compared with the prior art, the implantable axial-flow type blood pump based on the blood flowing pressure and Pivot supporting has the advantages that mechanical friction of a supporting bearing is effectively reduced, the probability that hemolysis and thrombus are formed in the blood pump is reduced, and the service life of the blood pump is effectively prolonged.
Description
technical field [0001] The invention relates to a design of an implantable axial-flow blood pump based on blood flow pressure and Pivot (Pivot jewel beering, pivot jewel bearing) support, which is applied to medical heart assisting equipment. Background technique [0002] The rehabilitation and treatment of heart failure (referred to as heart failure) caused by cardiomyopathy is a major problem faced by countries all over the world, and artificial heart pump (referred to as blood pump) is an effective way to alleviate this problem. The existing artificial heart pumps mainly include axial flow type and centrifugal type, among which the axial flow type has become the mainstream of domestic and foreign research because of its small size and high efficiency. [0003] The flow channel cavity of the axial flow blood pump is mainly composed of the front guide wheel, the impeller and the rear guide wheel. The front and rear guide wheels can eliminate the circular motion component of...
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IPC IPC(8): A61M1/12
CPCA61M60/135A61M60/148A61M60/205A61M60/818
Inventor 吴华春单开正熊振宇陈妙柯
Owner WUHAN UNIV OF TECH