CN215135918U - Blood pump and impeller - Google Patents

Abstract

This specification provides a blood pump and impeller, relates to medical instrument technical field, the blood pump includes: a housing; an impeller disposed within the housing, comprising: the blade-mounted turbine rotor comprises a hub and at least one blade, wherein the hub is provided with a cavity, the blade is arranged on the outer wall of the hub, a jet flow part is arranged on the hub or the blade and is communicated with the cavity, and the jet flow part is provided with a plurality of blades; the power mechanism is used for driving the hub to rotate; the liquid inlet mechanism is used for conveying pressure liquid to the chamber; the pressure liquid can be through feed liquor mechanism the cavity gets into efflux portion, and pass through a plurality of efflux portion orientations the inner wall of casing jets out, with the impeller support in the casing. The blood pump and the impeller provided by the specification can increase a non-contact mode to enable the impeller to be supported in a pump shell, and can maintain the position of the impeller, so that the number of supporting bearings can be reduced, and harm to a human body is reduced.

Description

Blood pump and impeller

Technical Field

The application relates to the technical field of medical equipment, in particular to a blood pump and an impeller.

Background

In the case of cardiac failure (e.g., cardiac arrest surgery, acute cardiogenic shock, etc.), a blood pump may be used in place of the heart to assist in maintaining blood circulation in the body. Intravascular blood pumps are typically inserted into a patient's blood vessel, such as the aorta, by means of a catheter. Blood pumps typically comprise a pump housing having a blood flow inlet and outlet, an impeller located within the pump housing, the impeller being provided with one or more blades for conveying blood.

In the prior art, the impeller is usually supported in the pump housing by means of a rotating shaft and a bearing sleeved outside the rotating shaft, and at least one bearing is disposed at both ends of the rotating shaft to support the impeller inside the pump housing. The bearing easily generates heat in the use process, and the heat generation risk is increased.

Meanwhile, the supporting surface between the bearing and the pump housing and the rotating surface between the bearing and the rotating shaft are all abraded, and chips are inevitably generated and easily enter blood of a human body to damage the human body. In order to reduce the wear of the bearing, a lubricating substance is often introduced into the bearing, and thus the lubricating substance also enters the blood of a human body to cause harm.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that exists among the prior art, the application provides a blood pump and impeller, increases contactless mode and makes the impeller support in the pump casing to can maintain the position of impeller, thereby can reduce the number of support bearing, reduce the harm to the human body.

In order to achieve the above purpose, the technical solution provided by the present application is as follows:

a blood pump, comprising:

a housing;

an impeller disposed within the housing, comprising: the blade-mounted turbine rotor comprises a hub and at least one blade, wherein the hub is provided with a cavity, the blade is arranged on the outer wall of the hub, a jet flow part is arranged on the hub or the blade and is communicated with the cavity, and the jet flow part is provided with a plurality of blades;

the power mechanism is used for driving the hub to rotate;

the liquid inlet mechanism is used for conveying pressure liquid to the chamber;

the pressure liquid can be through feed liquor mechanism the cavity gets into efflux portion, and pass through a plurality of efflux portion orientations shells inner wall jets out, with the impeller support in the casing.

In a preferred embodiment, the plurality of fluidic portions are disposed on the blade, and a flow passage is formed in the blade and communicates between the fluidic portions and the chamber.

In a preferred embodiment, the hub has a cylindrical structure and has a longitudinal extension direction, the impeller has a cross section in a direction perpendicular to the longitudinal extension direction of the hub, and the plurality of jet portions are symmetrically arranged in projection on the cross section.

As a preferred embodiment, the jet part is specifically a jet hole, and an included angle between a center line of at least part of the jet hole and a normal of the inner wall of the casing is 0 °.

As a preferred embodiment, the power mechanism includes: a motor; with what motor drive connected is used for driving the rotatory axis of rotation of wheel hub, the axis of rotation has hollow structure, the axis of rotation with wheel hub cooperation is connected, the axis of rotation be provided with the first trompil that feed liquor mechanism is linked together, and with the second trompil that the runner is linked together, pressure liquid warp first trompil gets into the axis of rotation, and the warp the second trompil of axis of rotation gets into the runner.

As a preferred embodiment, the rotating shaft is inserted into the cavity of the hub, and the rotating shaft has a first end and a second end opposite to each other, the first end is close to the liquid inlet mechanism, and the second end is blocked.

As a preferred embodiment, the liquid inlet mechanism includes: a coupling member connected to a first end of the rotating shaft; and the liquid supply part is arranged on the coupling piece and communicated with the first opening.

As a preferred embodiment, the impeller is made of a flexible material.

As a preferred embodiment, the housing is made of a flexible material.

An impeller, comprising:

a hub having a cavity;

the blade is arranged on the outer wall of the hub, a plurality of jet flow portions are arranged on the blade, a flow channel is formed in the blade, and the flow channel is communicated between the jet flow portions and the cavity.

Has the advantages that:

according to the blood pump and the impeller provided by the embodiment of the specification, the liquid inlet mechanism is used for providing pressure liquid to the inside of the cavity of the impeller, and the pressure liquid is ejected towards the inner wall of the shell through the plurality of jet flow parts so as to support the impeller in the shell. Therefore, compared with the traditional mode of supporting the impeller through a plurality of bearings, the number of the bearings can be greatly reduced. Moreover, the impeller is supported in a jet flow mode, so that the position of the impeller can be always maintained when the impeller works.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive labor.

FIG. 1 is a longitudinal cross-sectional view of an impeller provided in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an internal structure of an impeller provided in an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an external structure of an impeller provided in an embodiment of the present disclosure;

FIG. 4 is a sectional view taken along A-A of FIG. 1;

fig. 5 is a schematic view of an internal structure of a blood pump provided in an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an external structure of a blood pump provided in an embodiment of the present disclosure;

fig. 7 is a sectional view taken along the direction B-B in fig. 6.

Description of reference numerals:

10. a blood pump; 1. a housing; 11. a blood inlet; 12. a blood outlet; 13. the inner wall of the shell; 2. an impeller; 21. a hub; 211. the lower end of the hub; 212. the upper end of the hub; 22. a blade; 23. a flow channel; 24. a jet portion; 3. a power mechanism; 31. a motor shaft; 32. a rotating shaft; 33. a transmission outer ring; 34. a seal ring; 35. a first end; 36. a second end; 4. a liquid supply section; 5. an impeller support.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope, and after reading the present invention, the modifications of the various equivalent forms of the present invention by those skilled in the art will fall within the scope defined by the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The blood pump and the impeller of the embodiment of the present specification will be explained and explained with reference to fig. 1 to 7. It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present invention. And for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments, and the descriptions of the same components may be mutually referred to and cited.

As shown in fig. 1-7, the blood pump 10 includes: a housing 1; an impeller 2 disposed within the housing 1, the impeller 2 comprising: a hub 21 having a cavity and at least one blade 22 disposed on an outer wall of the hub 21, a jet portion 24 is disposed on the hub 21 or the blade 22, the jet portion 24 is communicated with the cavity, and the jet portion 24 has a plurality; the power mechanism 3 is used for driving the hub 21 to rotate; the liquid inlet mechanism is used for conveying pressure liquid to the chamber; the pressure liquid can pass through the liquid inlet mechanism, the chamber enters the jet flow portion 24, and passes through the plurality of jet flow portions 24 towards the shell inner wall 13 is ejected out, so that the impeller 2 is supported in the shell 1.

As shown in fig. 5 and 6, the housing 1 includes a blood inlet 11 and a blood outlet 12. The blood pump 10 is embodied as an intravascular pump, which is applied to a blood vessel of a patient. The impeller 2 is arranged in the shell 1, and the impeller 2 is driven to rotate by the power mechanism 3 so as to convey blood from the blood inlet 11 to the blood outlet 12.

The impeller 2 comprises a hub 21 with a cavity and at least one blade 22 arranged on the outer wall of the hub 21, the hub 21 is in transmission connection with the power mechanism 3, the hub 21 is driven to rotate, the blade 22 can be driven to rotate, blood is sucked into the blood inlet 11 by negative pressure, and then flows through a gap between the blade 22 and the inner wall 13 of the shell and then flows out through the blood outlet 12. The hub 21 may be of a cylindrical, preferably circular tubular, construction. As shown in fig. 4, the blades 22 may have a spiral structure, and are wound on the outer surface of the hub 21, and at least one, preferably two or three blades are provided.

Of course, in some embodiments, the blade 22 may also be an airfoil structure, and at least two blades are provided, and the present application is not limited to the specific shape of the blade 22.

The power mechanism 3 is specifically a motor, which may be a built-in motor, that is, the motor enters into the human body together, the motor has a motor shaft 31, and a transmission mechanism may be disposed between the motor shaft 31 and the hub 21 of the impeller 2, so that the hub 21 is driven to rotate by the transmission mechanism. Or, an external motor can be adopted, the motor does not enter the human body along with the impeller 2, and the motor can be connected with the impeller 2 through the transmission of the flexible shaft so as to drive the impeller 2 to rotate.

Specifically, the impeller 2 has a plurality of jet portions 24, and the jet portions 24 may be provided on the blades 22 or the hub 21, respectively. The jet portion 24 is used for forming a jet of the entering pressure liquid, and whether the jet portion 24 is arranged on the blade 22 or the hub 21, the pressure liquid needs to enter through the hub 21, so that the jet portion 24 needs to be communicated with a cavity of the hub 21.

In one embodiment, as shown in fig. 1 and 2, the plurality of fluidic portions 24 are each provided on the blade 22, and a flow passage 23 is formed inside the blade 22, and the flow passage 23 communicates between the fluidic portions 24 and a cavity of the hub 21. Accordingly, the pressure fluid enters the cavity of the hub 21, enters the flow channels 23 of the blades 22, and is discharged from the jet portion 24.

In some possible embodiments, the fluidic portion 24 may also be provided on the hub 21. For example, a plurality of symmetrical ducts are provided in the circumferential direction of the hub 21, one end of the ducts communicating with the chamber of the hub 21 and the other end being provided with a discharge orifice, so as to be able to form a jet support towards the inner wall of the casing 1. Of course, the position and structure of the jet part 24 are not limited to the above description, and other modifications are possible for those skilled in the art based on the technical spirit of the present application, and all that is required is to be covered by the scope of the present application as long as the function and effect achieved by the jet part is the same as or similar to that of the present application.

Preferably, the plurality of fluidic portions 24 are each disposed on the blade 22. Further, as shown in fig. 2 and 7, the number of the flow passages 23 may correspond to the number of the jet portions 24, and the flow passages 23 may be fine passages provided in the blade 22 so that the fluid can maintain a large pressure to be emitted from the jet portions 24. Each flow passage 23 has an inlet at a connection point between the blade 22 and the hub 21 and an outlet provided at the blade 22, respectively.

In order to form the jet support, the impeller 2 is provided with a plurality of jet portions 24, which are symmetrically arranged in a projection manner on a cross section of the impeller 2 in a direction perpendicular to the longitudinal extension direction of the hub 21, so as to keep the jet vector sum of the plurality of jet portions 24 zero, thereby keeping the position of the impeller 2 in the housing 1 as centered as possible. Correspondingly, as shown in fig. 2, the flow channels 23 provided on the blades 22 are also symmetrically arranged in projection on the cross section.

As shown in fig. 2 and 3, the hub 21 has a lower hub end 211 and an upper hub end 212 opposite to each other in the longitudinal extension direction thereof, and in order to ensure sufficient jet flow supporting force for supporting the impeller 2 in the casing 1, the jet flow portions 24 are arranged on the blades 22 at intervals in the direction from the lower hub end 211 to the upper hub end 212, thereby ensuring that each position of the impeller 2 can be supported by the jet flow.

The fluidic portion 24 may be a fluidic orifice disposed on the blade 22. Alternatively, it may be a nozzle provided on the vane 22. Preferably, the jet part 24 is a jet hole, and an included angle between a center line of at least a part of the jet hole and a normal of the inner wall 13 of the housing is 0 ° to provide the maximum holding force.

In this specification, the impeller 2 and the inner wall 13 of the casing are dynamically balanced under the action of the jet flow, and the gap between the blades 22 and the inner wall 13 of the casing is maintained within a reasonable range, so that the blood can flow between the blades 22 and the inner wall 13 of the casing. Preferably, the clearance between the blades 22 and the inner wall 13 of the housing is 0.05-0.4 mm.

In the present embodiment, the casing 1 and the impeller 2 may be made of a rigid material or a flexible material. Preferably, the casing 1 and the impeller 2 are made of a flexible material, which may be rubber or the like. The impeller 2 and the housing 1 made of flexible materials can reduce damage to vessel walls, the impeller 2 made of flexible materials is difficult to keep shape and position in the housing 1, a plurality of bearings are usually needed for supporting so as to maintain the position of the impeller 2, and the increase of the number of the bearings easily causes the risk of heat generation and introduces more impurities. In this embodiment, the impeller 2 and the inner wall 13 of the housing form a jet flow support, so that the number of bearings can be greatly reduced, and the shape and position balance of the flexible impeller can be ensured.

In this specification, the power mechanism 3 includes: a motor; with the axis of rotation 32 that is used for driving wheel hub 21 rotation that motor drive connects, axis of rotation 32 has hollow structure, axis of rotation 32 with wheel hub 21 cooperation is connected, axis of rotation 32 be provided with the first trompil that the feed liquor mechanism is linked together, and with the second trompil that runner 23 is linked together, pressure liquid warp first trompil gets into axis of rotation 32, and the warp the second trompil of axis of rotation 32 gets into runner 23.

Specifically, the motor has a motor shaft 31, the motor shaft 31 may be directly connected to the rotating shaft 32 or indirectly connected to the rotating shaft 32, and a transmission outer ring 33 may be disposed between the motor shaft 31 and the rotating shaft 32. The rotating shaft 32 is connected to the hub 21 to rotate the hub 21. The rotating shaft 32 may be connected with the cavity of the hub 21 by an interference fit, or the rotating shaft 32 may be connected with the cavity of the hub 21 by other methods, which is not limited in this application.

The rotating shaft 32 may be inserted into the cavity of the hub 21, the rotating shaft 32 has a first end 35 and a second end 36 opposite to each other, the first end 35 is close to the liquid inlet mechanism, and the second end 36 is blocked. Therefore, after the pressure fluid enters from the first opening of the rotating shaft 32, the pressure can be suppressed in the rotating shaft 32 due to the blocking of the second end 36, and the pressure fluid can enter the flow channel 23 of the blade 22 from the second opening of the rotating shaft 32 completely, so that the jet flow forms enough supporting force.

Further, the second end 36 may be passed through the cavity of the hub 21, and an impeller support 5 may be disposed outside the second end to support the impeller 2 in the housing 1, the impeller support 5 may be a bearing seat, or other type of support structure.

In this specification, the liquid inlet mechanism may include: a coupling member connected to the rotating shaft 32; and the liquid supply part 4 is arranged on the coupling piece, and the liquid supply part 4 is communicated with the first opening. Thus, the pressure fluid, which may be saline or glucose supplied from the outside, may be supplied to the impeller 2 through the fluid supply portion 4 into the rotating shaft 32. Further, the coupling member may be connected to the housing of the motor, the liquid supply portion 4 may be connected to an external device for supplying pressure liquid through a pipeline, and a sealing ring 34 may be disposed between the rotating shaft 32 and the coupling member in order to seal the coupling member and the rotating shaft 32.

The blood pump 10 provided by the specification enables the impeller to be supported in the pump shell in a non-contact manner, the position of the impeller can be maintained, the heat generation risk generated in the use process of the bearing can be reduced, and the introduced impurities can be reduced. The blood pump 10 provided herein may require a significantly reduced number of bearings as compared to conventional support.

The present embodiment also provides an impeller 2, as shown in fig. 1 to 4, including: a hub 21 having a cavity; at least one blade 22 arranged on the outer wall of the hub 21, wherein a plurality of jet flow parts 24 are arranged on the blade 22, a flow passage 23 is formed in the blade 22, and the flow passage 23 is communicated between the jet flow parts 24 and the chamber.

The impeller can achieve the technical problems solved by the above embodiments, and accordingly achieves the technical effects of the above embodiments, and specific details of the present application are not repeated herein.

The above embodiments are merely illustrative of the technical concepts and features of the present application, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the present application should be covered in the protection scope of the present application.

Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes.

Claims (10)

1. A blood pump, comprising:

a housing;

an impeller disposed within the housing, comprising: the blade-mounted turbine rotor comprises a hub and at least one blade, wherein the hub is provided with a cavity, the blade is arranged on the outer wall of the hub, a jet flow part is arranged on the hub or the blade and is communicated with the cavity, and the jet flow part is provided with a plurality of blades;

the power mechanism is used for driving the hub to rotate;

the liquid inlet mechanism is used for conveying pressure liquid to the chamber;

the pressure liquid can be through feed liquor mechanism the cavity gets into efflux portion, and pass through a plurality of efflux portion orientations shells inner wall jets out, with the impeller support in the casing.

2. The blood pump of claim 1, wherein said plurality of fluidic portions are each disposed on said blade, said blade having a flow channel formed therein, said flow channel communicating between said fluidic portions and said chamber.

3. The blood pump according to claim 2, wherein said hub is of a cylindrical configuration having a longitudinal extension, said impeller being provided on a cross section of said hub in a direction perpendicular to said longitudinal extension, said plurality of fluidic portions being arranged symmetrically in projection on said cross section.

4. The blood pump according to claim 3, characterized in that said jet portion is embodied as a jet hole, and the angle between the center line of at least some of said jet holes and the normal of the inner wall of said housing is 0 °.

5. The blood pump of claim 2, wherein said power mechanism comprises: a motor; with what motor drive connected is used for driving the rotatory axis of rotation of wheel hub, the axis of rotation has hollow structure, the axis of rotation with wheel hub cooperation is connected, the axis of rotation be provided with the first trompil that feed liquor mechanism is linked together, and with the second trompil that the runner is linked together, pressure liquid warp first trompil gets into the axis of rotation, and the warp the second trompil of axis of rotation gets into the runner.

6. The blood pump of claim 5, wherein said rotatable shaft is disposed through said hub cavity, said rotatable shaft having opposite first and second ends, said first end being adjacent said intake mechanism and said second end being closed off.

7. The blood pump of claim 5, wherein said intake mechanism comprises: a coupling member connected to the rotating shaft; and the liquid supply part is arranged on the coupling piece and communicated with the first opening.

8. The blood pump of claim 1, wherein said impeller is made of a flexible material.

9. The blood pump of claim 1, wherein said housing is made of a flexible material.

10. An impeller, comprising:

a hub having a cavity;

the blade is arranged on the outer wall of the hub, a plurality of jet flow portions are arranged on the blade, a flow channel is formed in the blade, and the flow channel is communicated between the jet flow portions and the cavity.

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