Influence of circumferential annular grooving design of impeller on suspended fluid force of axial flow blood pump

被引：2

作者：

Wang, Liang ^{[1
,2
]}

Yun, Zhong ^{[1
]}

Tang, Xiaoyan ^{[1
]}

Xiang, Chuang ^{[2
]}

机构：

[1] Cent South Univ, Sch Mech & Elect Engn, 932 South Lushan Rd, Changsha 410083, Hunan, Peoples R China

[2] Hunan Univ Arts & Sci, Coll Mech Engn, Changde, Hunan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ARTIFICIAL ORGANS | 2022年 / 45卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Axial flow blood pump; impeller; circumferential groove; depth; suspension;

D O I：

10.1177/03913988211064912

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Aiming at insufficient suspension force on the impeller when the hydraulic suspension axial flow blood pump is start at low speed, the impeller suspension stability is poor, and can't quickly enter the suspended working state. By establishing the mathematical model of the suspension force on the impeller, then the influence of the circumferential groove depth of the impeller on the suspension force is analyzed, and the annular groove depth on the impeller blade in the direction of fluid inlet and outlet was determined as (0.26, 0.02 mm). When the blood pump starts, there is an eccentricity between the impeller and the pump tube, the relationship between the suspension force and the speed of the impeller under different eccentricities is analyzed. Combined with the prototype experiment, the circumferential annular grooving design of the impeller can make the blood pump rotate at about 3500 rpm into the suspension state, when the impeller is at 8000 rpm, the impeller can basically achieve stable suspension at the eccentricity of 0.1 mm in the gravity direction, indicating that the reasonable circumferential annular grooving design of the impeller can effectively improve the suspension hydraulic force of the impeller and improve the stability of the hydraulic suspension axial flow blood pump.

引用

页码：360 / 370

页数：11