CN219251394U - Shell for magnetic suspension blood pump - Google Patents

Abstract

The utility model discloses a shell for a magnetic suspension blood pump, which comprises a body, wherein the body is provided with a first cavity, the bottom of the first cavity is provided with a raised boss, the boss is provided with an inner cavity, a permanent magnet is arranged in the inner cavity, and the permanent magnet is positioned in the first cavity. The beneficial effects of the utility model are as follows: the protruding portion can be provided with a permanent magnet, and the protruding portion is matched with the permanent magnet on the rotor, so that the rotor can be suspended in the first cavity.

Description

Shell for magnetic suspension blood pump

Technical Field

The utility model relates to a magnetic suspension blood pump, in particular to a shell for the magnetic suspension blood pump.

Background

The use of implantable heart assist devices to achieve long-term circulatory support has become an effective method of treating advanced heart failure clinically. The "continuous bleeding pump" which has been rapidly developed in recent years is relatively suitable for long-term in vivo implantation. The continuous bleeding pump mainly comprises an axial flow pump and a centrifugal pump, and both the axial flow pump and the centrifugal pump adopt impellers rotating at high speed to drive blood to flow. The traditional impeller supporting system is a mechanical bearing, can limit the movement of the rotating impeller in the radial direction and the axial direction at the same time, and has high rigidity and compact structure. The mechanical bearings have the disadvantage that the mutually sliding contact surfaces during operation generate friction, wear and local temperature increases, creating areas of blood retention and thrombus attachment around the bearing. The impellers of the third generation implantable heart assist devices are supported by suspension bearings, such as the "HeartMate 3" and "HeartWare HVAD" centrifugal pumps currently in common use in the United states. However, blood pumps for long-term use implanted in the body are required to overcome some important drawbacks, such as: thromboembolism, hemorrhage, infection, abrasion of blood pump, and destruction of blood components. The five-degree-of-freedom full-suspension volume of the magnetic force control rotating impeller is larger, so that the implantation of patients with smaller stature is difficult, and the magnetic force control rotating impeller is not suitable for Asian species and children.

Through long-term research, the inventor of the company innovates the shell in order to realize the function of the magnetic suspension blood pump, and the magnetic suspension blood pump can enable the rotor to be in a suspension state for a long time under the action of magnetic force.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a shell for a magnetic suspension blood pump.

The aim of the utility model is achieved by the following technical scheme: the utility model provides a casing for magnetic suspension blood pump, includes the body, and the body has first cavity, and the bottom of first cavity is provided with bellied bellying, and bellying has the inner chamber, installs the permanent magnet in the inner chamber, and the permanent magnet is located first cavity.

Optionally, a blind hole is formed in the tail part of the protruding part towards the head part, the blind hole forms an inner cavity of the protruding part, the permanent magnet is installed in the blind hole, and the tail part of the permanent magnet is fixed through a fixing block installed in the blind hole.

Optionally, a magnetism isolating piece is also installed between the tail part of the permanent magnet and the fixed block.

Optionally, a sensor is installed between the magnetism isolating piece and the fixed block.

Optionally, a cushion block is installed at the bottom of the inner cavity of the protruding part, and the cushion block is abutted with the permanent magnet.

Optionally, the permanent magnets are a plurality of, and a plurality of permanent magnets are stacked.

Optionally, the head of the boss protrudes from the first cavity.

Optionally, the body is further provided with a second cavity, the second cavity is far away from the head of the protruding portion, the tail of the protruding portion penetrates through the first cavity, the tail of the protruding portion is located in the second cavity, the cavity bottom of the second cavity is provided with a protruding barrel, the tail of the protruding portion is located in the barrel, and the barrel is sleeved with a magnetism isolating sleeve.

Optionally, an annular groove is formed at the edge of the second cavity.

The utility model has the following advantages: according to the shell for the magnetic suspension blood pump, the permanent magnet can be arranged on the protruding portion and matched with the permanent magnet on the rotor, so that the rotor can be suspended in the first cavity.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

in the figure, 100-body, 101-first cavity, 102-protruding part, 103-blind hole, 104-permanent magnet, 105-cushion, 106-magnetism isolating piece, 107-fixed block, 108-sensor, 109-barrel, 110-magnetism isolating sleeve, 111-second cavity, 112-ring channel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, fig. 2 and fig. 3, a casing for a magnetic suspension blood pump includes a main body 100, the main body 100 has a first cavity 101, a protruding protrusion 102 is provided at the bottom of the first cavity 101, the protrusion 102 has an inner cavity, a permanent magnet 104 is installed in the inner cavity, the permanent magnet 104 is located in the first cavity 101, in this embodiment, a second permanent magnet matched with the permanent magnet 104 is provided in the first cavity 101 near the central area of the rotor, in this embodiment, the permanent magnet 104 is in a columnar structure, the second permanent magnet is in a ring-shaped structure, the permanent magnet 104 and the second permanent magnet are coaxially installed, so that when the rotor is placed in the first cavity 101, the magnetic force between the permanent magnet 104 and the second permanent magnet can overcome the gravity of the rotor, thereby suspending the rotor, and in this embodiment, the permanent magnet 104 and the second permanent magnet are coaxially designed, and the rotor is in a central symmetrical structure, so that the rotor can be automatically centered under the magnetic force between the permanent magnet 104 and the second permanent magnet 104, in this embodiment, the first cavity 101 is in a ring-shaped cavity, the protruding protrusion 102 is arranged in the central line of the first cavity 101, and the first permanent magnet 101 can be automatically centered in the axial direction after the first cavity 101.

In this embodiment, as shown in fig. 3, a blind hole 103 is formed from the tail of the protruding portion 102 to the head, the blind hole 103 forms an inner cavity of the protruding portion 102, a permanent magnet 104 is installed in the blind hole 103, the tail of the permanent magnet 104 is fixed by a fixing block 107 installed in the blind hole 103, and after the permanent magnet 104 is fixed, the magnetic field generated by the permanent magnet 104 can be ensured to be stable.

In this embodiment, a magnetism isolating member 106 is further installed between the tail portion of the permanent magnet 104 and the fixed block 107, a sensor 108 is installed between the magnetism isolating member 106 and the fixed block 107, the sensor 108 is a hall sensor 108, the sensor 108 is a commercially available product and is mainly used for detecting the magnetic force, in this embodiment, the hall sensor 108 is used for detecting the magnetic force change of the second permanent magnet, the magnetism isolating member 106 is made of magnetism isolating materials, and the magnetism isolating member 106 is arranged between the permanent magnet 104 and the sensor 108, so that the influence of the magnetic field formed by the permanent magnet 104 on the sensor 108 can be greatly reduced by the magnetism isolating member 106, and the stability of rotor rotation can be improved.

In this embodiment, as shown in fig. 3, a cushion block 105 is installed at the bottom of the cavity of the inner cavity of the protruding portion 102, the cushion block 105 is abutted against the permanent magnet 104, when in installation, the position of the permanent magnet 104 in the axial direction can be adjusted by adopting cushion blocks 105 with different heights, so that the position corresponds to the second permanent magnet on the rotor, further, the number of the permanent magnets 104 is multiple, the plurality of the permanent magnets 104 are stacked, the number of the second permanent magnets on the rotor corresponds to the number of the permanent magnets 104, the thickness is the same, and the magnetic force between the permanent magnets 104 and the second permanent magnets can be stabilized by the plurality of the permanent magnets 104 and the plurality of the second permanent magnets, so that the stability of rotor rotation can be improved.

In this embodiment, as shown in fig. 3, the head of the protruding portion 102 protrudes out of the first cavity 101, preferably, the head of the protruding portion 102 has a hemispherical structure, and when blood comes in, the head of the protruding portion 102 can uniformly distribute the blood in the circumferential direction.

In this embodiment, as shown in fig. 1, 2 and 3, the body 100 is further provided with a second cavity 111, the second cavity 111 is far away from the head of the boss 102, the tail of the boss 102 penetrates through the first cavity 101, the tail of the boss 102 is located in the second cavity 111, the cavity bottom of the second cavity 111 is provided with a protruding cylinder 109, the tail of the boss 102 is located in the cylinder 109, and the cylinder 109 is sleeved with a magnetism isolating sleeve 110, so that the magnetism isolating sleeve 110 can greatly reduce the influence of a magnetic field generated by a coil in the second cavity 111 on the sensor 108.

In this embodiment, the cavity edge of the second cavity 111 is provided with an annular groove 112, and the annular groove 112 is mainly used for installing the stator assembly.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (9)

1. The utility model provides a casing for magnetic suspension blood pump which characterized in that: the permanent magnet type solar cell module comprises a body, wherein the body is provided with a first cavity, a raised boss is arranged at the bottom of the first cavity and is provided with an inner cavity, a permanent magnet is arranged in the inner cavity, and the permanent magnet is positioned in the first cavity.

2. A housing for a magnetic levitation blood pump according to claim 1, wherein: the tail of the protruding portion is provided with a blind hole towards the head, the blind hole forms an inner cavity of the protruding portion, the permanent magnet is installed in the blind hole, and the tail of the permanent magnet is fixed through a fixing block installed in the blind hole.

3. A housing for a magnetic levitation blood pump according to claim 2, characterized in that: and a magnetism isolating piece is also arranged between the tail part of the permanent magnet and the fixed block.

4. A housing for a magnetic levitation blood pump according to claim 3, characterized in that: and a sensor is arranged between the magnetism isolating piece and the fixed block.

5. The housing for a magnetic levitation blood pump of claim 4, wherein: and a cushion block is arranged at the bottom of the inner cavity of the protruding part, and the cushion block is abutted with the permanent magnet.

6. The casing for a magnetic levitation blood pump according to any one of claims 1 to 5, characterized in that: the permanent magnets are a plurality of, and the permanent magnets are stacked.

7. The housing for a magnetic levitation blood pump of claim 6, wherein: the head of the boss protrudes out of the first cavity.

8. The casing for a magnetic levitation blood pump according to any one of claims 1 to 5, characterized in that: the body is further provided with a second cavity, the second cavity is far away from the head of the protruding portion, the tail of the protruding portion penetrates through the first cavity, the tail of the protruding portion is located in the second cavity, the cavity bottom of the second cavity is provided with a protruding barrel, the tail of the protruding portion is located in the barrel, and the barrel is sleeved with a magnetism isolating sleeve.

9. The housing for a magnetic levitation blood pump of claim 8, wherein: an annular groove is formed in the edge of the second cavity.

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