Impeller and magnetic suspension centrifugal pump

Abstract

The embodiment of the application discloses a kind of impeller and magnetic suspension centrifugal pump, impeller includes: at least two first blades, are radially spaced, for pushing liquid rotation;The first end of at least two first blades is formed around and forms liquid inlet passage, and the accommodating groove is formed between adjacent two first blades in at least two first blades;Base, with the first side of at least two first blades fixedly connected, is blocked in the first side of accommodating groove;Liquid enters accommodating groove by liquid inlet passage, and under the condition that base drives at least two first blades to rotate, at least two first blades can push the liquid in accommodating groove to rotate, base can block the liquid in accommodating groove to the first side of first blade movement.The impeller of the embodiment of the application, base can block the liquid in accommodating groove to the first side of first blade movement, so that impeller can push more liquid flow, so as to improve the ability of impeller to transport liquid, so that liquid reaches higher flow and pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a impeller and a magnetic suspension centrifugal pump. BACKGROUND

[0002] The magnetic suspension centrifugal pump is a commonly used medical device, and the liquid can be provided with flow power through the magnetic suspension centrifugal pump. For example, the heart is the power organ of the human body, and the main function of the heart is to provide power for blood flow and transport blood to all parts of the body. When the patient's heart has a problem and cannot provide power, the patient's life is in danger, and the magnetic suspension centrifugal pump can be used to provide power for the patient's blood. However, the efficiency of the impeller of the magnetic suspension centrifugal pump in the prior art for conveying liquid is low. SUMMARY

[0003] Therefore, the embodiments of the present application aim to provide an impeller and a magnetic suspension centrifugal pump.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] The embodiments of the present application provide an impeller, comprising: at least two first blades, which are arranged in a radial direction and are used to push the liquid to rotate; a first end of the at least two first blades is arranged to form a liquid inlet channel, and a containing groove is formed between adjacent two first blades of the at least two first blades; wherein the liquid inlet channel is in communication with the containing groove;

[0006] a base, which is fixedly connected to a first side of the at least two first blades, is arranged to block a first side of the containing groove, and is used to drive the at least two first blades to rotate;

[0007] When the liquid enters the containing groove through the liquid inlet channel and the base drives the at least two first blades to rotate, the at least two first blades can push the liquid in the containing groove to rotate, and the base can block the liquid in the containing groove from moving to the first side of the first blade.

[0008] In some optional implementation manners, the impeller further comprises:

[0009] a top cover, which is fixedly connected to a second side of the at least two first blades, is arranged to block a second side of the containing groove, and has a through hole; the position of the through hole corresponds to the position of the liquid inlet channel; and the second side of the containing groove and the first side of the containing groove are arranged oppositely;

[0010] When the liquid enters the containing groove through the through hole and the liquid inlet channel and the base drives the at least two first blades to rotate, the top cover can block the liquid in the containing groove from moving to the second side of the first blade.

[0011] In some optional implementations, the top cover is a circular plate structure, the through hole is located in the middle of the top cover, and an outer diameter of the top cover is less than or equal to a diameter of a circle formed by the second ends of the at least two first blades; a diameter of the through hole is greater than or equal to a diameter of a circle formed by the first ends of the at least two first blades.

[0012] The first end of the first blade is located at an inner edge of the radial structure formed by the at least two first blades, and the second end of the first blade is located at an outer edge of the radial structure formed by the at least two first blades.

[0013] In some optional implementations, the base is a columnar structure, the base and the top cover are coaxially arranged, and an outer diameter of the top cover is greater than or equal to an outer diameter of the base.

[0014] In some optional implementations, the impeller further comprises:

[0015] at least two second blades arranged in a radial manner with the at least two first blades; a first side of the at least two second blades is fixedly connected to the base, and the base is used to drive the at least two second blades to rotate; and a length of the second blade is less than a length of the first blade.

[0016] In some optional implementations, a number of the at least two second blades is the same as a number of the at least two first blades, and the at least two second blades and the at least two first blades are arranged in an interlaced manner.

[0017] In some optional implementations, the base is used to drive the at least two first blades to rotate about a first rotation axis;

[0018] A distance between the second end of the at least two first blades and the first rotation axis is equal to a distance between the second end of the at least two second blades and the first rotation axis.

[0019] The first end of the second blade is located at an inner edge of a radial structure formed by the at least two second blades, and the second end of the second blade is located at an outer edge of the radial structure formed by the at least two second blades.

[0020] In some optional implementations, the first blade and the second blade are both curved structures, and a curved direction of the first blade and the second blade is opposite to a direction in which the base rotates.

[0021] In some optional implementations, the first end of the first blade and the second end of the first blade are convex circular arc surfaces.

[0022] This application embodiment also provides a magnetic levitation centrifugal pump, which includes: a housing and the impeller described in this application;

[0023] The housing has a receiving cavity and an inlet and an outlet communicating with the receiving cavity; the impeller is received in the receiving cavity, the liquid inlet channel corresponds to the position of the inlet, and the second end of the first blade corresponds to the position of the outlet;

[0024] Liquid can enter the inlet channel through the inlet, and liquid in the receiving tank can be discharged from the outlet through the second end of the first blade.

[0025] In some alternative implementations, the magnetically levitated centrifugal pump further includes a stator disposed outside the housing, the stator being used to drive the base to levitate and rotate within the receiving cavity.

[0026] In the embodiments of this application, when liquid enters the receiving tank through the inlet channel and the base drives the at least two first blades to rotate, the at least two first blades can push the liquid in the receiving tank to rotate. The base can prevent the liquid in the receiving tank from moving towards the first side of the first blade, thus preventing the liquid from moving towards the first side of the first blade. This allows the impeller to push more liquid to flow, thereby improving the impeller's ability to transport liquid and enabling the liquid to achieve a higher flow rate and pressure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an optional impeller structure in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of an optional impeller structure in an embodiment of this application;

[0029] Figure 3 This is an optional structural cross-sectional view of the impeller in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of an optional impeller structure in an embodiment of this application;

[0031] Figure 5 This is an optional structural cross-sectional view of the rotor in an embodiment of this application;

[0032] Figure 6 This is an optional structural cross-sectional view of the rotor in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of an optional rotor structure in an embodiment of this application;

[0034] Figure 8This is an exploded view of an optional rotor structure in an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of an optional structure of the magnetic levitation centrifugal pump in an embodiment of this application.

[0036] Reference numerals: 100, impeller; 110, first blade; 111, liquid inlet channel; 112, receiving tank; 113, first end of the first blade; 114, second end of the first blade; 120, base; 121, magnet; 130, top cover; 131, through hole; 140, second blade; 141, first end of the second blade; 142, second end of the second blade; 200, housing; 210, top cover; 220, bottom cover; 201, receiving cavity; 202, inlet; 203, outlet; 300, stator. Detailed Implementation

[0037] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] In the embodiments described in this application, it should be noted that, unless otherwise stated and limited, the term "connection" should be interpreted broadly. For example, it can be an electrical connection, or a connection between two internal components. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above term according to the specific circumstances.

[0039] It should be noted that the terms "first," "second," and "third" used in the embodiments of this application are merely used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first," "second," and "third" can be interchanged in a specific order or sequence where permitted. It should be understood that the objects distinguished by "first," "second," and "third" can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following is in conjunction with... Figures 1 to 4 The impeller 100 described in the embodiments of this application will be described in detail.

[0041] like Figure 1As shown, the impeller 100 includes at least two first blades 110 and a base 120. The at least two first blades 110 are arranged radially at intervals and are used to drive the liquid to rotate. The first ends 113 of the at least two first blades form a liquid inlet channel 111, and a receiving groove 112 is formed between adjacent first blades 110. The liquid inlet channel 111 is connected to the receiving groove 112. The base 120 is fixedly connected to the first side of the at least two first blades 110. The base 120 seals the first side of the receiving groove 112 and is used to drive the at least two first blades 110 to rotate. When liquid enters the receiving groove 112 through the liquid inlet channel 111 and the base 120 drives the at least two first blades 110 to rotate, the at least two first blades 110 can push the liquid in the receiving groove 112 to rotate. The base 120 can prevent the liquid in the receiving groove 112 from moving towards the first side of the first blades 110, thus preventing the liquid from moving towards the first side of the first blades 110. This allows the impeller 100 to push more liquid flow, thereby improving the impeller 100's ability to transport liquid and thus achieving higher flow rate and pressure.

[0042] In the embodiments of this application, the number of at least two first blades 110 is not limited. For example, as Figure 1 As shown, the number of at least two first blades 110 can be eight.

[0043] Here, the shape of the first blade 110 is not limited. For example, the first blade 110 can be a straight plate or a curved plate. When the first blade 110 is a curved plate, the bending direction of the first blade 110 is opposite to the rotation direction of the base 120. For example, if the first blade 110 rotates counterclockwise, the first blade 110 bends in a clockwise direction to increase the area on which the first blade 110 pushes the liquid, thereby increasing the liquid conveying capacity of the impeller 100 and achieving higher flow rate and pressure.

[0044] Here, a first portion of the first side surface of the first blade 110 is connected to the base 120, and a second portion of the first side surface of the first blade 110 protrudes from the base 120. The shape of the second portion of the first side surface of the first blade 110 is not limited. For example, the second portion of the first side surface of the first blade 110 can be a plane, an inclined plane, or a curved surface.

[0045] Here, the second side surface of the first blade 110 is disposed opposite to the first side surface of the first blade 110. The shape of the second side surface of the first blade 110 is not limited. For example, the second side surface of the first blade 110 can be a plane, an inclined plane, or a curved surface. As an example, when the second side surface of the first blade 110 is an inclined plane, the first end 113 of the first blade is higher and the second end 114 of the first blade is lower.

[0046] Here, at least two first blades 110 are arranged radially at intervals, such as Figure 1 As shown, the first end 113 of the first blade is located at the inner edge of the radial structure formed by the at least two first blades 110, and the second end 114 of the first blade is located at the outer edge of the radial structure formed by the at least two first blades 110.

[0047] Here, the first blade 110 is used to drive the liquid to rotate so that the liquid can reach the set pressure and flow rate.

[0048] The specific composition of the liquid is not limited here. For example, the liquid can be blood or saline solution.

[0049] Here, the first ends 113 of the at least two first blades form a liquid inlet channel 111, and a receiving groove 112 is formed between two adjacent first blades 110; wherein, the liquid inlet channel 111 is connected to the receiving groove 112; so that liquid can enter the receiving groove 112 through the liquid inlet channel 111. It should be noted that the liquid inlet channel 111 is not a closed channel. Since at least two first blades 110 are spaced apart, the first ends 113 of the at least two first blades form the liquid inlet channel 111. The liquid inlet channel 111 has an opening between the first ends 113 of two adjacent first blades. The liquid inlet channel 111 communicates with the receiving tank 112 through the opening so that the liquid in the liquid inlet channel 111 can enter the receiving tank 112 through the opening. The first blades 110 are used to push the liquid in the receiving tank 112 to rotate. When the first blades 110 push the liquid in the receiving tank 112 to rotate, the liquid rotates with the first blades 110. Under the action of centrifugal force, the liquid will move from the first end 113 of the first blade to the second end 114 of the first blade, thereby increasing the pressure and flow rate of the liquid.

[0050] Here, the first end 113 and the second end 114 of the first blade can be convex arc surfaces so that the liquid flows smoothly at the first end 113 and the second end 114 of the first blade, reducing the impact of the first end 113 and the second end 114 of the first blade on the liquid, thereby reducing the damage caused by the first blade 110 to the liquid.

[0051] Here, the material of the first blade 110 is not limited. For example, the material of the first blade 110 can be a flexible material or a rigid material.

[0052] In this embodiment, the structure of the base 120 is not limited. For example, the base 120 can be a columnar structure, such as... Figure 1 As shown. Of course, the base 120 can also be a frustum-shaped structure.

[0053] Here, the method of fixing the base 120 to the first side of the at least two first blades 110 is not limited. For example, the base 120 and the at least two first blades 110 can be an integral structure. Or, for example, the base 120 and the at least two first blades 110 can be separate structures. Here, the base 120 and the at least two first blades 110 can be connected by adhesive or by welding.

[0054] Here, the base 120 is sealed on the first side of the receiving tank 112 to prevent the liquid in the receiving tank 112 from moving to the first side of the receiving tank 112 and flowing out of the receiving tank 112.

[0055] Here, the implementation method of the base 120 for driving the at least two first blades 110 to rotate is not limited. For example, as Figure 1 and Figure 3 As shown, the base 120 has a columnar structure with a cavity in the middle. A ring-shaped magnet 121 is disposed inside the base 120. An external electromagnetic coil interacts with the magnet 121 to levitate and rotate the base 120. The magnet 121 drives the at least two first blades 110 to levitate and rotate. Here, liquid can flow in the cavity in the middle of the base 120, preventing the liquid from stagnating in the base 120; for example, when the liquid is blood, it can prevent the liquid from stagnating in the base 120 and causing blood clots.

[0056] When liquid enters the receiving tank 112 through the inlet channel 111, and the base 120 drives the at least two first blades 110 to rotate, the at least two first blades 110 can push the liquid in the receiving tank 112 to rotate. The base 120 can prevent the liquid in the receiving tank 112 from moving towards the first side of the first blade 110, thus preventing the liquid from moving towards the first side of the first blade 110. This allows the impeller 100 to push more liquid flow, thereby improving the impeller 100's ability to transport liquid and enabling the liquid to achieve a higher flow rate and pressure.

[0057] In some optional implementations of the embodiments of this application, such as Figure 2 and Figure 3As shown, the impeller 100 may further include a top cover 130. The top cover 130 is fixedly connected to the second side of the at least two first blades 110. The top cover 130 seals the second side of the receiving groove 112 and has a through hole 131. The position of the through hole 131 corresponds to the position of the liquid inlet channel 111. The second side of the receiving groove 112 is opposite to the first side of the receiving groove 112. When liquid enters the receiving groove 112 through the through hole 131 and the liquid inlet channel 111, and when the base 120 drives the at least two first blades 110 to rotate, the top cover 130 can prevent the liquid in the receiving groove 112 from moving to the second side of the first blades 110, thus preventing the liquid from moving to the second side of the first blades 110. The top cover 130 and the base 120 can prevent the liquid from leaking from both sides of the first blades 110, improve the working efficiency of the impeller, and enable the impeller 100 to drive more liquid flow, thereby further improving the liquid conveying capacity of the impeller 100, so that the liquid reaches a higher flow rate and pressure, and increases the energy conversion rate of the impeller 100.

[0058] In this implementation, the structure of the top cover 130 is not limited. For example, the top cover 130 can also be a square plate structure. As another example, the top cover 130 can be a circular plate structure, with the through hole 131 located in the middle of the top cover 130. When the top cover 130 is a circular plate structure, the outer diameter of the top cover 130 can be less than or equal to the diameter of the circle formed by the second ends 114 of the at least two first blades, so that the top cover 130 does not affect the dimensions of the impeller 100 in the outer diameter direction; the diameter of the through hole 131 can be greater than or equal to the diameter of the circle formed by the first ends 113 of the at least two first blades, so that the top cover 130 does not affect the liquid inflow into the liquid inlet channel 111.

[0059] Here, the bottom surface of the top cover 130 is connected to the second side surface of the first blade 110, and the shape of the bottom surface of the top cover 130 matches the shape of the second side surface of the first blade 110.

[0060] Here, the shape of the top surface of the top cover 130 is not limited. For example, the top surface of the top cover 130 can be a plane, an inclined plane, or a curved surface.

[0061] In this implementation, when the base 120 is a columnar structure, the base 120 and the top cover 130 can be coaxially arranged, and the outer diameter of the top cover 130 can be greater than or equal to the outer diameter of the base 120.

[0062] In some optional implementations of the embodiments of this application, the impeller 100 may further include: at least two second blades 140, which are radially arranged and spaced apart from the at least two first blades 110; the first side of the at least two second blades 140 is fixedly connected to the base 120, and the base 120 is used to drive the at least two second blades 140 to rotate; the length of the second blades 140 is less than the length of the first blades 110, so as to push the liquid through blades of different lengths.

[0063] In this implementation, the length of the second blade 140 is the length formed between the first end 141 and the second end 142 of the second blade. The length of the first blade 110 is the length formed between the first end 113 and the second end 114 of the first blade.

[0064] Here, the first end 141 and the second end 142 of the second blade can be convex arc surfaces so that the liquid flows smoothly at the first end 141 and the second end 142 of the second blade, reducing the impact of the first end 141 and the second end 142 of the second blade on the liquid, thereby reducing the damage caused by the second blade 140 to the liquid.

[0065] In this implementation, the first end 141 of the second blade is located at the inner edge of the radial structure formed by the at least two second blades 140, and the second end 142 of the second blade is located at the outer edge of the radial structure formed by the at least two second blades 140.

[0066] In this implementation, the number of at least two second blades 140 is not limited. For example, as... Figure 4 As shown, the number of at least two second blades 140 can be four.

[0067] Here, the number of at least two second blades 140 may be the same as or different from the number of at least two first blades 110.

[0068] In this implementation, the shape of the second blade 140 is not limited. For example, the second blade 140 can be a straight plate or a curved plate. When the second blade 140 is a curved plate, the bending direction of the second blade 140 is opposite to the rotation direction of the base 120. For example, the second blade 140 rotates counterclockwise and bends clockwise to increase the area of ​​the second blade 140 that pushes the liquid and improve the pushing efficiency of the impeller 100. Of course, both the first blade 110 and the second blade 140 can be curved structures, and the bending directions of the first blade 110 and the second blade 140 are opposite to the rotation direction of the base 120.

[0069] Here, the first portion of the first side surface of the second blade 140 is connected to the base 120, and the second portion of the first side surface of the second blade 140 protrudes from the base 120. The shape of the second portion of the first side surface of the second blade 140 is not limited. For example, the second portion of the first side surface of the second blade 140 can be a plane, an inclined plane, or a curved surface.

[0070] Here, the second side surface of the second blade 140 is disposed opposite to the first side surface of the second blade 140. The shape of the second side surface of the second blade 140 is not limited. For example, the second side surface of the second blade 140 can be a plane, an inclined plane, or a curved surface. As an example, when the second side surface of the second blade 140 is an inclined plane, the first end 141 of the second blade is higher and the second end 142 of the second blade is lower.

[0071] In this implementation, the at least two second blades 140 and the at least two first blades 110 are spaced apart. This can be either at least two of the at least two second blades 140 are located between two adjacent first blades 110, or each of the at least two second blades 140 is located between two adjacent first blades 110.

[0072] For example, the number of the at least two second blades 140 is the same as the number of the at least two first blades 110, and the at least two second blades 140 and the at least two first blades 110 are arranged alternately. Here, the number of the at least two second blades 140 and the number of the at least two first blades 110 are not limited. For example, as... Figure 4 As shown, the number of the at least two second blades 140 and the number of the at least two first blades 110 are both four.

[0073] In this implementation, the base 120 is used to drive the at least two first blades 110 to rotate around the first axis. The distance between the second end 114 of the at least two first blades and the first axis is equal to the distance between the second end 142 of the at least two second blades and the first axis, so that the second blades 140 do not increase the outer diameter of the radial structure formed by the at least two first blades 110, and the second blades 140 can push more liquid to rotate. Since the length of the second blades 140 is less than the length of the first blades 110, the distance between the first end 113 of the at least two first blades and the first axis is less than the distance between the second end 142 of the at least two second blades and the first axis, so that the second end 142 of the second blades does not block the liquid from entering the receiving tank 112 from the opening of the liquid inlet channel 111, thereby increasing the liquid flow rate into the receiving tank 112.

[0074] Here, the material of the second blade 140 is not limited. For example, the material of the second blade 140 can be a flexible material or a rigid material.

[0075] Of course, in other implementations of this application, the impeller 100 may also only have a first blade 110, such as... Figure 1 As shown.

[0076] like Figures 5 to 8 As shown in the illustration, this application also describes a magnetic levitation centrifugal pump, which includes: a housing 200 and the impeller 100 described in this application embodiment; the housing 200 has a receiving cavity 201 and an inlet 202 and an outlet 203 communicating with the receiving cavity 201; the impeller 100 is received in the receiving cavity 201, the liquid inlet channel 111 corresponds to the position of the inlet 202, and the second end 114 of the first blade corresponds to the position of the outlet 203; liquid can enter the liquid inlet channel 111 through the inlet 202, and liquid in the receiving tank 112 can be discharged through the outlet 203; so that the liquid is rotated by the rotating impeller 100, thereby giving the liquid a set flow rate and pressure.

[0077] In this embodiment, the blades in the impeller 100 drive the liquid to rotate, causing the liquid to be thrown outwards along the blades under the action of centrifugal force, and exited from the housing 200 through the outlet 203. Under the action of pressure, the new liquid enters the receiving cavity 201 of the housing 200 through the inlet 202, thus realizing the continuous delivery of liquid.

[0078] In this embodiment, the structure of the housing 200 is not limited. For example, as... Figure 7 and Figure 8 As shown, the housing 200 may include an upper cover 210 and a bottom cover 220, with a receiving cavity 201 formed between the upper cover 210 and the bottom cover 220.

[0079] Here, the housing 200 is used to collect the liquid thrown out by the impeller 100 so that the liquid can be discharged from the outlet 203, so that the liquid reaches the set pressure and flow rate at the outlet 203.

[0080] In this embodiment, the location of the inlet 202 is not limited, as long as the liquid inlet channel 111 corresponds to the location of the inlet 202, so that liquid can enter the liquid inlet channel 111 through the inlet 202. For example, as Figure 5 As shown, the inlet 202 is located on the top side of the housing 200.

[0081] In this embodiment, the location of the outlet 203 is not limited, as long as the second end 114 of the first blade corresponds to the location of the outlet 203, so that the liquid in the receiving tank 112 can be discharged from the outlet 203 through the second end 114 of the first blade. For example, as Figure 5 and Figure 6 As shown, outlet 203 is located on one side of housing 200.

[0082] It should be noted that when the impeller 100 includes the second blade 140, the liquid in the receiving tank 112 is discharged from the outlet 203 through the second end 114 of the first blade and the second end 142 of the second blade.

[0083] In the embodiments of this application, such as Figure 9 As shown, the magnetic levitation centrifugal pump may further include a stator 300; the stator 300 is disposed outside the housing 200, and the stator 300 is used to drive the base 120 to levitate and rotate within the receiving cavity 201, so that the base 120 drives the first blade 110 to rotate within the receiving cavity 201, so that the liquid entering from the inlet 202 is discharged from the outlet 203, and the liquid is pushed by the first blade 110 to reach the set flow rate and pressure.

[0084] In this embodiment, the structure of the stator 300 is not limited. For example, a magnet 121 is provided in the base 120, and the stator 300 includes an electromagnetic coil. When the electromagnetic coil is energized, the magnet 121 can drive the base 120 to levitate and rotate within the receiving cavity 201.

[0085] It should be noted that when there is no force between the electromagnetic coil and the magnet 121 and the impeller is placed vertically, the first blade 110 is in contact with the housing 200; when there is no force between the electromagnetic coil and the magnet 121 and the impeller is placed at an angle, both the first blade 110 and the base 120 are in contact with the housing 200. Figure 5 This is a schematic diagram of a magnetically levitated centrifugal pump in operation.

[0086] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An impeller, characterized by, The impeller comprises: at least two first blades arranged in a radial pattern for pushing the liquid to rotate; the first ends of the at least two first blades form a liquid inlet channel, and the adjacent two first blades among the at least two first blades form a containing groove; wherein the liquid inlet channel is in communication with the containing groove; a base fixedly connected to the first side of the at least two first blades and blocking the first side of the containing groove, for driving the at least two first blades to rotate; under the condition that the liquid enters the containing groove through the liquid inlet channel and the base drives the at least two first blades to rotate, the at least two first blades can push the liquid in the containing groove to rotate, and the base can block the liquid in the containing groove from moving to the first side of the first blade; the material of the first blade is a flexible material; The impeller further comprises: a top cover fixedly connected to the second side of the at least two first blades; the outer diameter of the top cover is smaller than the diameter of the circle formed by the second ends of the at least two first blades.

2. The impeller according to claim 1, wherein the top cover blocks the second side of the containing groove and has a through hole; the position of the through hole corresponds to the position of the liquid inlet channel; the second side of the containing groove and the first side of the containing groove are oppositely arranged; under the condition that the liquid enters the containing groove through the through hole and the liquid inlet channel and the base drives the at least two first blades to rotate, the top cover can block the liquid in the containing groove from moving to the second side of the first blade.

3. The impeller of claim 2, wherein the top cover is a circular plate structure, and the through hole is located in the middle of the top cover; the diameter of the through hole is greater than or equal to the diameter of the circle formed by the first ends of the at least two first blades; wherein the first end of the first blade is located at the inner edge of the radial structure formed by the at least two first blades, and the second end of the first blade is located at the outer edge of the radial structure formed by the at least two first blades.

4. The impeller of claim 3, wherein the base is a columnar structure, the base and the top cover are coaxially arranged, and the outer diameter of the top cover is greater than or equal to the outer diameter of the base.

5. The impeller of claim 1, wherein The impeller further comprises: at least two second blades arranged in a radial pattern with the at least two first blades; the first side of the at least two second blades is fixedly connected to the base, and the base is used for driving the at least two second blades to rotate; the length of the second blade is smaller than the length of the first blade.

6. The impeller of claim 5, wherein the number of the at least two second blades is the same as the number of the at least two first blades, and the at least two second blades and the at least two first blades are staggered and arranged.

7. The impeller of claim 5 wherein, the base is used for driving the at least two first blades to rotate around a first rotation axis; the distance between the second end of the at least two first blades and the first rotation axis is equal to the distance between the second end of the at least two second blades and the first rotation axis; wherein the first end of the second blade is located at the inner edge of the radial structure formed by the at least two second blades, and the second end of the second blade is located at the outer edge of the radial structure formed by the at least two second blades.

8. An impeller according to any one of claims 5 to 7, wherein The first blade and the second blade are curved structures, and the curved directions of the first blade and the second blade are opposite to the rotating direction of the base.

9. The impeller of any one of claims 1 to 7, wherein The first end of the first blade and the second end of the first blade are convex arc surfaces.

10. A magnetic levitation centrifugal pump, characterized by The magnetic suspension centrifugal pump comprises a shell and the impeller according to any one of claims 1 to 9. The shell has a containing cavity, an inlet and an outlet communicating with the containing cavity; the impeller is contained in the containing cavity, the liquid inlet channel corresponds to the position of the inlet, and the second end of the first blade corresponds to the position of the outlet. Liquid can enter the liquid inlet channel through the inlet, and the liquid in the containing groove can be guided out of the outlet through the second end of the first blade.

11. The magnetic levitation centrifugal pump of claim 10, wherein, The magnetic suspension centrifugal pump further comprises a stator; the stator is arranged outside the shell, and the stator is used to drive the base to suspend and rotate in the containing cavity.

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