阅读说明：本技术 一种基于线接触的轴承连接装置 (Bearing connecting device based on line contact ) 是由 刘树红 左志钢 郭苗 黄博 于 2019-11-13 设计创作，主要内容包括：本发明公开了一种基于线接触的轴承连接装置,包括：转动部件及轴承；转动部件的中心与轴承接触。转动部件的圆环形内环侧面设有由三条支撑腿组成的支撑架,三条支撑腿将转动部件的内环三等分,转动部件内部设有磁块,其依靠磁动力转动；所述支撑架中心设有圆盘状凸起,轴承的顶端为平面,平面上设有三个凸出的耳卡；三个耳卡头部均与圆盘状凸起后端的表面接触,形成线接触球轴承旋转特征,耳卡的表面弧度与圆盘状凸起后端的表面弧度相同。轴承轴向支撑力依靠反向于轴承的转动部件后方流动的生物溶液所产生的轴向推力与耳卡互相平衡。本发明的优点是：轴支撑架与轴承形成良好配合,并良好接触形成旋转特征,最大限度减小接触面积。(The invention discloses a bearing connecting device based on line contact, which comprises: a rotating member and a bearing; the center of the rotating member is in contact with the bearing. The side surface of the circular inner ring of the rotating part is provided with a support frame consisting of three supporting legs, the three supporting legs divide the inner ring of the rotating part into three equal parts, and a magnetic block is arranged in the rotating part and rotates by depending on the magnetic power; the center of the support frame is provided with a disc-shaped bulge, the top end of the bearing is a plane, and three convex ear clips are arranged on the plane; the head parts of the three ear clamps are in contact with the surface of the rear end of the disc-shaped protrusion to form the rotation characteristic of a linear contact ball bearing, and the surface radian of the ear clamps is the same as that of the rear end of the disc-shaped protrusion. The axial bearing force of the bearing is balanced with the ear clip by the axial thrust generated by the biological solution flowing backward of the rotating part of the bearing. The invention has the advantages that: the shaft support frame and the bearing form a good fit, and the good contact forms a rotating characteristic, so that the contact area is reduced to the maximum extent.)

1. A line contact based bearing connection device, comprising: a rotating member and a bearing;

the center of the rotating part is connected with the bearing, and the bearing is used for supporting the rotating part to rotate by taking the bearing as the center;

the side surface of the inner ring of the rotating part is provided with a shaft support frame consisting of three supporting legs, the three supporting legs trisect the inner ring of the rotating part, a magnetic block is arranged in the rotating part, and the rotating part rotates by means of magnetic power;

the center of the shaft support frame is provided with a disc-shaped bulge, the top end of the bearing is a plane, and three convex ear clips are arranged on the plane; the head parts of the three ear clamps are in contact with the surface of the rear end of the disc-shaped protrusion to form the rotation characteristic of a linear contact ball bearing, and the surface radian of the ear clamps is the same as that of the rear end of the disc-shaped protrusion.

2. A line contact based bearing connection according to claim 1, wherein: the ear card is in a spherical shape or an elliptical flat wing shape.

3. A line contact based bearing connection according to claim 1, wherein: the cross section of the supporting leg is in the shape of an airfoil.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a bearing connecting device based on line contact, which can be applied to biological solution pumping or centrifugal type extracorporeal heart.

Background

At present, the corresponding rotating shafts or bearings in medical pumps, heart pump systems and other devices involved in the distribution of related biological solutions are in large-area contact with the biological solutions, which easily causes the rupture of related biological cells in the biological solutions or blood around and in the rotating parts. Causes the related proportion of the biological solution to be disordered and does not reach the standard. The phenomenon is extremely dangerous to vital signs and is firmly prevented from happening. In addition, animal experiments and plant experiments related to drug development also need to be applied to the distribution problem of biological solutions, so that the products can be used in the drug development and development process.

Such problems, if they cause a large percentage of associated cell damage, can cause local high shear stress inside the flow channel, which in turn can cause serious consequences such as flow channel blockage, hemolysis, thrombosis, secondary flow immunosuppression, etc. Therefore, the patent carries out detailed optimization design aiming at the rotating shaft and bearing fields related to the fields, and the linear contact bearing has great significance for reducing related serious problems and consequences caused by abrasion and large contact area in practical application.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a bearing connecting device based on line contact, which solves the defects in the prior art.

In order to realize the purpose, the technical scheme adopted by the invention is as follows:

a line contact based bearing connection device comprising:

a rotating member and a bearing;

the center of the rotating part is connected with the bearing, and the bearing is used for supporting the rotating part to rotate by taking the bearing as the center;

the side surface of the inner ring of the rotating part is provided with a shaft support frame consisting of three supporting legs, the three supporting legs trisect the inner ring of the rotating part, a magnetic block is arranged in the rotating part, and the rotating part rotates by means of magnetic power;

the center of the shaft support frame is provided with a disc-shaped bulge, the top end of the bearing is a plane, and three convex ear clips are arranged on the plane; the head parts of the three ear clamps are in contact with the surface of the rear end of the disc-shaped protrusion to form the rotation characteristic of a linear contact ball bearing, and the surface radian of the ear clamps is the same as that of the rear end of the disc-shaped protrusion.

Further, the shape of the ear clip is a spherical or elliptical flat wing shape.

Further, the cross section of the supporting leg is an airfoil.

Compared with the prior art, the invention has the advantages that:

the shaft support frame and the bearing form a good fit, and the good contact forms a rotating characteristic, so that the contact area is reduced to the maximum extent.

Drawings

FIG. 1 is a schematic view showing the construction of a heart pump according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of a heart pump of embodiment 1 of the present invention with the front pump cover and inlet line removed;

FIG. 3 is a schematic structural view of a rear pump cover according to embodiment 1 of the present invention;

FIG. 4 is a schematic view showing the connection of an impeller and a bearing according to embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of an impeller according to embodiment 1 of the present invention;

FIG. 6 is a schematic view of a bearing structure with a spherical ear clip according to embodiment 1 of the present invention;

fig. 7 is a schematic view of a bearing structure with oval flat wing type ear clips in embodiment 2 of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings by way of examples.