Artificial heart

Abstract

The utility model relates to an artificial heart, including the middle casing of cylindrical shape, the coaxial magnetic suspension linear motion unit is equipped in the middle casing, the magnetic suspension linear motion unit includes motor housing, is equipped with the linear motion mover iron core that reciprocates along the middle casing axial motion in the motor housing, and the both ends of linear motion mover iron core are fixedly connected with the action rod spare that passes out the corresponding end face of motor housing, the both ends of the middle casing are connected with the arc pump shell, and the open end of arc pump shell is connected with the corresponding end of the middle casing and is sealed and clamped and is equipped with the disc type diaphragm, and the cavity between disc type diaphragm and adjacent arc pump shell forms the blood pumping chamber, the blood outlet and blood inlet are arranged on the arc pump shell and are spaced, the free end of two action rod spare is connected with the middle part of corresponding end disc type diaphragm respectively to realize the systole and diastole of blood pumping chamber when linear motion mover iron core reciprocates. The utility model discloses the artificial heart is high in bionics, and the heat consumption is low in use, and the compact firm structure can guarantee firm use, and the use reliability is higher.

Description

Technical Field

[0001] This invention belongs to the technical field of mechanical devices for driving circulation in medicine, and specifically relates to an artificial heart. Background Technology

[0002] An artificial heart is an advanced artificial organ that can replace a damaged heart. Its main function is to reconstruct an artificial blood circulation system that adapts to the needs and physiological changes of human tissues and organs. Artificial hearts can be divided into temporary and permanent types. Temporary artificial hearts partially replace the function of the heart, such as the artificial heart assist pumps involved in existing technologies like CN111012962B and CN118718236A. These pumps use a single simulated chamber and the reciprocating pulsation of a disc-shaped diaphragm to assist in drawing blood from the ventricles of the human heart and pumping it into the ascending aorta, thus helping the blood enter the human circulation. Long-term, or fully artificial, replacement of the entire heart, such as the bidirectional drive artificial heart pump described in existing technology CN105251068A, can output pulsed blood flow similar to that of a natural heart, mimicking the working process of a natural heart quite well. However, it uses an electromagnetic-permanent magnet bidirectional drive method, achieving the compression and relaxation of the elastic sac through the change of the two magnetic poles of the electromagnet. This method cannot effectively control the compression and relaxation stroke of the elastic sac, resulting in poor control over the stroke of the elastic sac's fluid absorption and drainage processes. Furthermore, the exposed elastic sac poses a contact problem that affects the reliability of actual implantation. Adding a shell would increase the overall size. Therefore, from a practical use perspective, current fully artificial hearts still require further improvement and optimization. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an artificial heart that avoids the problems of poor reliability and controllability of current total artificial hearts.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An artificial heart includes a cylindrical inner shell; a magnetically levitated linear motion unit is coaxially arranged inside the inner shell, the magnetically levitated linear motion unit includes a motor housing, and a linear motion mover core that reciprocates along the axial direction of the inner shell is provided inside the motor housing. The two ends of the linear motion mover core are respectively fixedly connected to the corresponding end faces of the motor housing. The first end of the middle shell is connected to a first arc-shaped pump shell. The open end of the first arc-shaped pump shell is connected to the first end of the middle shell and a first disc-shaped diaphragm is sealed and clamped therein. The side of the first disc-shaped diaphragm facing the first arc-shaped pump shell forms a first blood pumping chamber with the inner cavity of the first arc-shaped pump shell. A first blood outlet and a first blood inlet are spaced apart on the first arc-shaped pump shell. The second end of the middle shell is connected to a second arc-shaped pump shell. The open end of the second arc-shaped pump shell is correspondingly connected to the second end of the middle shell and a second disc-shaped diaphragm is sealed and clamped therein. The side of the second disc-shaped diaphragm facing the second arc-shaped pump shell forms a second blood pumping chamber with the inner cavity of the second arc-shaped pump shell. A second blood outlet and a second blood inlet are spaced apart on the second arc-shaped pump shell. The free ends of the two action rods are respectively connected to the middle of the first disc-shaped diaphragm and the second disc-shaped diaphragm, so as to realize the contraction and relaxation of the first and second blood pumping chambers when the linear motion mover core reciprocates.

[0005] To further improve the above technical solution, artificial valves for controlling the opening and closing of the first blood outlet, the first blood inlet, the second blood outlet, and the second blood inlet are respectively provided.

[0006] Furthermore, the motor housing is coaxially fixed inside the middle housing, and multiple stator core groups are provided axially spaced inside the motor housing. Each stator core group includes several stator cores circumferentially spaced around the outside of the linear motion mover core, and stator windings are sleeved on the stator cores.

[0007] Furthermore, an outer stator core ring is coaxially fixed inside the motor housing, and all stator cores are fixed to the inner wall of the outer stator core ring.

[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. The artificial heart of this invention has a compact structure. Through the reciprocating motion of a linear motion manipulator core, two actuators drive the first and second disc-shaped diaphragms to agitate, correspondingly achieving the contraction and relaxation of the first and second pumping chambers. In use, the second blood outlet connects to the aorta, delivering blood to the whole body before returning to the first blood inlet. The first blood outlet connects to the pulmonary artery, delivering blood to the lungs for oxygenation before returning to the second blood inlet. When the linear motion manipulator core moves towards the second arc-shaped pump housing, the second blood outlet and the first blood inlet open, and the second blood inlet and the first blood outlet close. The second pumping chamber is compressed, and the first pumping chamber relaxes. Blood is pumped from the second blood outlet through the second pumping chamber to the aorta. Simultaneously, all blood in the body flows back to the first blood inlet. The systemic circulation system, specifically the pump chamber, simulates the process in which the left ventricle pumps oxygenated blood into the aorta, delivers it throughout the body, and returns it to the right atrium. When the linear motion actuator moves toward the first arc-shaped pump housing, the second blood inlet and the first blood outlet open, while the second blood outlet and the first blood inlet close. The first pump chamber is compressed, and the second pump chamber relaxes. Blood is pumped from the first blood outlet through the first pump chamber to the pulmonary artery. Simultaneously, oxygenated blood from the lungs flows back to the second pump chamber through the second blood inlet, simulating the pulmonary circulation process. This cycle demonstrates a high degree of biomimicry. The magnetically levitated linear motion unit generates low heat, reducing its impact on the blood. The middle shell, the first arc-shaped pump housing, and the second arc-shaped pump housing are all rigid structures, ensuring stable use of the artificial heart and higher reliability.

[0009] 2. The artificial heart of this invention can control the reciprocating motion of the linear motion mover core by forming bias magnetic flux of different sizes, thereby changing the contraction and relaxation of the first and second pumping chambers and improving controllability. Attached Figure Description

[0010] Figure 1 A three-dimensional schematic diagram of an artificial heart according to a specific embodiment; Figure 2 This is a top view schematic diagram of an artificial heart according to a specific embodiment; Figure 3 for Figure 2 A cross-sectional view of the AA fold section; Figure 4 This is a schematic cross-sectional view of the middle part of the artificial heart in a specific embodiment; The components include: a first arc-shaped pump housing 1, a first disc-shaped diaphragm 11, a first blood pumping chamber 12, a first blood outlet 13, a first blood inlet 14, a second arc-shaped pump housing 2, a second disc-shaped diaphragm 21, a second blood pumping chamber 22, a second blood outlet 23, a second blood inlet 24, a middle housing 3, a motor housing 51, an outer stator core ring 52, a stator core 53, a stator winding 54, a linear motion mover core 6, an action rod 61, and a Hall sensor 7. Detailed Implementation

[0011] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0012] Please see Figures 1-3 The artificial heart structure in a specific embodiment includes a cylindrical inner shell 3 with open ends; a magnetically levitated linear motion unit is coaxially arranged inside the inner shell 3, the magnetically levitated linear motion unit includes a motor housing 51, and a linear motion mover core 6 that reciprocates along the axial direction of the inner shell 3 is provided inside the motor housing 51. The two ends of the linear motion mover core 6 are respectively fixed with actuating rods 61 that extend through the corresponding end faces of the motor housing 51; the length extension direction of the actuating rods 61 corresponds to the reciprocating direction of the linear motion mover core 6.

[0013] The first end of the middle shell 3 is connected to a first arc-shaped pump shell 1. The open end of the first arc-shaped pump shell 1 is correspondingly connected to the first end of the middle shell 3 and a first disc-shaped diaphragm 11 is sealed and clamped therein. The side of the first disc-shaped diaphragm 11 facing the first arc-shaped pump shell 1 forms a first blood pumping chamber 12 with the inner cavity of the first arc-shaped pump shell 1. A first blood outlet 13 and a first blood inlet 14 are spaced apart on the first arc-shaped pump shell 1. A second arc-shaped pump housing 2 is connected to the second end of the middle housing 3 opposite to its first end. The open end of the second arc-shaped pump housing 2 is connected to the second end of the middle housing 3 and a second disc-shaped diaphragm 21 is sandwiched therebetween. The side of the second disc-shaped diaphragm 21 facing the second arc-shaped pump housing 2 forms a second blood pumping chamber 22 with the inner cavity of the second arc-shaped pump housing 2. A second blood outlet 23 and a second blood inlet 24 are spaced apart on the second arc-shaped pump housing 2. The first blood outlet 13, the first blood inlet 14, the second blood outlet 23 and the second blood inlet 24 are respectively provided with artificial valves (not shown in the figure) for controlling opening and closing.

[0014] The free ends of the two action rods 61 are fixedly connected to the middle of the first disc-shaped diaphragm 11 and the second disc-shaped diaphragm 21, respectively, so that when the linear motion mover core 6 reciprocates, it pushes and pulls the disc-shaped diaphragm to realize the contraction and relaxation of the first blood pumping chamber 12 and the second blood pumping chamber 22.

[0015] Please continue reading Figure 3The artificial heart in this embodiment has a compact structure. Through the reciprocating motion of the linear motion manipulator core 6, two actuating rods 61 respectively drive the first disc-shaped diaphragm 11 and the second disc-shaped diaphragm 21 to agitate, correspondingly achieving the contraction and relaxation of the first and second pumping chambers 12 and 22. In use, the second blood outlet 23 connects to the aorta, delivering blood to the whole body before returning to the first blood inlet 14. The first blood outlet 13 connects to the pulmonary artery, delivering blood to the lungs for oxygenation before returning to the second blood inlet 24. When the linear motion manipulator core 6 moves towards the second arc-shaped pump housing 2, the second blood outlet 23 and the first blood inlet 14 open, and the second blood inlet 24 and the first blood outlet 13 close. The second pumping chamber 22 is compressed, and the first pumping chamber 12 relaxes. Blood is pumped from the second pumping chamber 22 through the second blood outlet 23 to the aorta. Simultaneously, blood from the whole body flows through the first blood inlet 14. 4. The blood flows back to the first pump chamber 12, simulating the process in systemic circulation where the left ventricle pumps oxygenated blood into the aorta, delivers it to the whole body, and returns it to the right atrium. When the linear motion actuator core 6 moves toward the first arc-shaped pump housing 1, the second blood inlet 24 and the first blood outlet 13 open, and the second blood outlet 23 and the first blood inlet 14 close. The first pump chamber 12 is compressed, and the second pump chamber 22 relaxes. Blood is pumped from the first blood outlet 13 through the first pump chamber 12 to the pulmonary artery. At the same time, the oxygenated blood after being oxygenated in the lungs flows back to the second pump chamber 22 through the second blood inlet 24, simulating the pulmonary circulation process. This cycle has a high degree of biomimicry. The magnetic levitation linear motion unit generates low heat, reducing the impact on the blood. The middle shell 3, the first arc-shaped pump housing 1, and the second arc-shaped pump housing 2 are all rigid structures, ensuring the stable use of the artificial heart and higher reliability.

[0016] Please see Figure 3 , Figure 4 The motor housing 51 is coaxially fixed within the middle housing 3. The motor housing 51 contains multiple stator core groups spaced axially. Each stator core group includes several stator cores 53 circumferentially spaced around the linear motion mover core 6. Stator windings 54 are fitted onto the stator cores 53. The figure shows six axially spaced stator core groups, each group containing four stator cores 53 spaced 90° apart circumferentially. The linear motion mover core 6 also has a corresponding four-phase structure.

[0017] In this way, by working with different numbers of stator core groups on one end of the axis, different sizes of bias magnetic flux can be formed, thereby controlling the stroke of the linear motion mover core 6 reciprocating and changing the contraction and relaxation of the first pump chamber 12 and the second pump chamber 22.

[0018] The outer stator core ring 52 is coaxially fixed inside the motor housing 51, and all stator cores 53 are fixed to the inner wall of the outer stator core ring 52. It can be an integral structure, which facilitates manufacturing and forming. In practice, the outer stator core ring 52 is also provided with multiple Hall sensors 7 spaced axially to sense and infer the axial position of the linear motion mover core 6, so as to better control its stroke.

[0019] The above describes the structure of the artificial heart in this embodiment. In use, it works in conjunction with the power supply unit, detection unit, and intelligent control unit. For example, the power supply unit and intelligent control unit can be housed within the middle shell 3. The power supply unit provides driving power to the magnetic levitation linear motion unit and the artificial valve. The intelligent control unit controls the process by which the power supply unit provides power to the magnetic levitation linear motion unit and the artificial valve, thereby adjusting the motion process of the linear motion actuator core 6, such as reciprocating motion, frequency, stroke, and other parameters, as well as the matching opening and closing of the artificial valve. The detection unit can be used to detect the physiological condition of the human body. The detection unit and the Hall sensor 7 are connected to the intelligent control unit as input signals, facilitating the intelligent control unit's recognition and control output.

[0020] The specific connections of the power supply, control components, housing, pump casing, and disc diaphragm are all based on existing technologies and will not be elaborated here.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An artificial heart, comprising a cylindrical inner shell (3); characterized in that: The inner shell (3) is provided with a magnetic levitation linear motion unit in the same axis. The magnetic levitation linear motion unit includes a motor shell (51). The motor shell (51) is provided with a linear motion mover core (6) that reciprocates along the axis of the inner shell (3). The two ends of the linear motion mover core (6) are respectively fixed with action rods (61) that pass through the corresponding end faces of the motor shell (51). The first end of the middle shell (3) is connected to a first arc-shaped pump shell (1). The open end of the first arc-shaped pump shell (1) is connected to the first end of the middle shell (3) and a first disc-shaped diaphragm (11) is sealed and clamped therein. The side of the first disc-shaped diaphragm (11) facing the first arc-shaped pump shell (1) forms a first blood pumping chamber (12) with the inner cavity of the first arc-shaped pump shell (1). A first blood outlet (13) and a first blood inlet (14) are spaced apart on the first arc-shaped pump shell (1). The second end of the middle shell (3) is connected to a second arc-shaped pump shell (2). The open end of the second arc-shaped pump shell (2) is connected to the second end of the middle shell (3) and a second disc-shaped diaphragm (21) is sealed and clamped therein. The side of the second disc-shaped diaphragm (21) facing the second arc-shaped pump shell (2) forms a second blood pumping chamber (22) with the inner cavity of the second arc-shaped pump shell (2). A second blood outlet (23) and a second blood inlet (24) are spaced apart on the second arc-shaped pump shell (2). The free ends of the two action rods (61) are respectively connected to the middle of the first disc diaphragm (11) and the second disc diaphragm (21) to realize the contraction and relaxation of the first blood pump chamber (12) and the second blood pump chamber (22) when the linear motion mover core (6) reciprocates.

2. The artificial heart according to claim 1, characterized in that: The first blood outlet (13), the first blood inlet (14), the second blood outlet (23), and the second blood inlet (24) are each provided with artificial valves for controlling their opening and closing.

3. The artificial heart according to claim 1, characterized in that: The motor housing (51) is coaxially fixed inside the middle housing (3). The motor housing (51) is provided with multiple stator core groups spaced axially. Each stator core group includes several stator cores (53) circumferentially spaced around the outside of the linear motion mover core (6). Stator windings (54) are sleeved on the stator cores (53).

4. The artificial heart according to claim 3, characterized in that: An outer stator core ring (52) is coaxially fixed inside the motor housing (51), and all stator cores (53) are fixed on the inner wall of the outer stator core ring (52).

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