Magnetic suspension impeller capable of reducing stirring resistance and bioreactor

Abstract

The utility model discloses a magnetic suspension impeller capable of reducing stirring resistance, which comprises a two-pole magnet, a shell and a plurality of blades, and the shell is used for wrapping the two-pole magnet; first wave-making teeth and second wave-making teeth are symmetrically arranged at the front ends of the blades; the upper ends of the first wave-making teeth are provided with first protruding parts, and the lower ends of the second wave-making teeth are provided with second protruding parts. A first flow channel is formed between the first protruding part and the blade, and a second flow channel is formed between the second protruding part and the blade. The utility model further discloses a bioreactor which comprises the magnetic suspension impeller for reducing the stirring resistance in the embodiment. The liquid mixing device is used in a liquid mixing system in the field of biopharmacy, and realizes the function of quickly and effectively mixing materials such as a culture medium and a buffer solution uniformly; during operation, the impeller can well eliminate wave-making resistance, and the operation stability of the impeller can also be improved; meanwhile, the driving current of the motor can be reduced, and electric energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of magnetic levitation impeller technology, and in particular to a magnetic levitation impeller and bioreactor that reduces stirring resistance. Background Technology

[0002] Magnetic levitation impellers experience significant resistance and low stability during liquid mixing, thus requiring a reduction in resistance to improve stability. Existing methods for improving the operational stability of magnetic levitation impellers mainly include the following two:

[0003] One approach is to add "anti-roll fins" to the tips of individual blades of the impeller. "Anti-roll fins" are artificial "fins" that help reduce rolling when the impeller rotates in a liquid. However, the ability of "anti-roll fins" to improve rolling is limited.

[0004] Secondly, all impellers are connected together by "bilge keels". The "bilge keels" can enhance the impeller's wave resistance, but as the speed increases, the impeller's own damping increases, while the relative proportion of the damping generated by the "bilge keels" in the total damping decreases, and its anti-rolling ability also decreases. On the other hand, adding "bilge keels" will increase the impeller's rotational inertia, resulting in an increase in the motor's control current, which increases energy consumption and also increases the difficulty of controlling the impeller at high speeds. Summary of the Invention

[0005] According to an embodiment of the present invention, a magnetic levitation impeller for reducing stirring resistance is provided, comprising a bipolar magnet, a shell and several blades, wherein the shell is used to cover the bipolar magnet.

[0006] The blade tip is symmetrically provided with a first wave-generating tooth and a second wave-generating tooth;

[0007] The first wave-generating tooth has a first protrusion at its upper end, and the second wave-generating tooth has a second protrusion at its lower end.

[0008] A first flow channel is formed between the first protrusion and the blade, and a second flow channel is formed between the second protrusion and the blade.

[0009] Furthermore, the first wave-generating tooth and the second wave-generating tooth have the same structure.

[0010] Furthermore, the width of the first wave-generating tooth and / or the second wave-generating tooth gradually increases along the blade direction.

[0011] According to another embodiment of the present invention, a bioreactor is provided, comprising the magnetically levitated impeller of the previous embodiment that reduces stirring resistance.

[0012] Furthermore, the outer shell is made of polypropylene.

[0013] The beneficial effects of this invention are: when used in liquid mixing systems in the biopharmaceutical field, it enables rapid and effective mixing of materials such as culture media and buffer solutions; during operation, the impeller can effectively eliminate wave resistance and improve the stability of impeller operation; at the same time, it can reduce the drive current of the motor and reduce power consumption.

[0014] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0015] Figure 1 This is a perspective view of a magnetically levitated impeller for reducing stirring resistance according to a first embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram showing the rotation direction of the magnetically levitated impeller for reducing stirring resistance according to the first embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram showing the relationship between the bipolar magnets and the outer shell of a magnetically levitated impeller for reducing stirring resistance according to the first embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the wave generation of a magnetically levitated impeller that reduces stirring resistance according to the first embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of an impeller with "anti-roll fins" in the prior art;

[0020] Figure 6 A schematic diagram of an impeller with a "bilge keel" in the prior art;

[0021] In the diagram, 1 is the bipolar magnet; 2 is the outer shell; 3 is the blade; 4 is the first wave-generating tooth; 41 is the first protrusion; 42 is the first flow channel; 5 is the second wave-generating tooth; 51 is the second protrusion; 52 is the second flow channel; 6 is the anti-roll fin; and 7 is the bilge keel. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0023] First, combine Figures 1-4 The present invention describes a magnetically levitated impeller that reduces stirring resistance according to an embodiment of the present invention, which is used in the field of biopharmaceutical technology and has a wide range of applications.

[0024] like Figures 1-4As shown, the magnetic levitation impeller for reducing stirring resistance in this embodiment of the present invention includes a bipolar magnet 1, a shell 2 and several blades 3, wherein the shell 2 is used to cover the bipolar magnet 1.

[0025] The blade 3 has a first wave-generating tooth 4 and a second wave-generating tooth 5 symmetrically arranged at its front end. The waveforms generated by the first wave-generating tooth 4 and the second wave-generating tooth 5 cancel out the waveforms generated by the blade 3, thereby reducing the "wave-generating resistance" and greatly improving the stability of the impeller operation, while also reducing the drive energy consumption of the motor.

[0026] Regarding wave-making resistance: During the stirring process, blade 3 of the impeller cuts through the liquid surface, causing the water level in the area where blade 3 moves forward to rise. This rising water level then immediately falls, forming a "wave" that travels along the edge of blade 3 towards the rear of blade 3. This process is called "wave-making." The increased contact area between blade 3 and the liquid leads to increased resistance, a phenomenon known as "wave-making resistance."

[0027] The first wave-generating tooth 4 has a first protrusion 41 at its upper end, and the second wave-generating tooth 5 has a second protrusion 51 at its lower end. During the rotation of the blade 3, the first protrusion 41 cancels out the waveform generated at the upper end of the blade 3, and the second protrusion 51 cancels out the waveform generated at the lower end of the blade 3.

[0028] A first flow channel 42 is formed between the first protrusion 41 and the blade 3, and a second flow channel 52 is formed between the second protrusion 51 and the blade 3. The first flow channel 42 and the second flow channel 52 facilitate the passage of water.

[0029] Furthermore, such as Figure 1 As shown, in this embodiment, the first wave-generating tooth 4 and the second wave-generating tooth 5 have the same structure.

[0030] Furthermore, such as Figure 1 As shown, in this embodiment, the width of the first wave-generating tooth 4 and / or the second wave-generating tooth 5 gradually increases along the direction of the blade 3.

[0031] During the rotation, blade 3 rotates clockwise, and the wave generated by blade 3 cancels out the wave generated by the first wave-generating tooth 4 and the second wave-generating tooth 5.

[0032] According to a second embodiment of the present invention, a bioreactor is provided, comprising the magnetically levitated impeller of the previous embodiment that reduces stirring resistance.

[0033] Furthermore, such as Figure 3 As shown, in this embodiment, the outer shell 2 is made of polypropylene, which is heat-resistant, corrosion-resistant, and lightweight.

[0034] Above, refer to Figures 1-4This invention describes a magnetically levitated impeller and bioreactor with reduced stirring resistance according to embodiments of the present invention. These are used in liquid mixing systems in the biopharmaceutical field, enabling rapid and effective mixing of materials such as culture media and buffer solutions. During operation, the impeller effectively eliminates wave-making resistance and improves the stability of impeller operation. Simultaneously, it reduces the drive current of the motor, thereby reducing energy consumption.

[0035] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0036] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A magnetically levitated impeller for reducing stirring resistance, comprising a bipolar magnet, a shell, and a plurality of blades, wherein the shell is used to cover the bipolar magnet; characterized in that, The blade front end is symmetrically provided with a first wave-generating tooth and a second wave-generating tooth; The first wave-generating tooth has a first protrusion at its upper end, and the second wave-generating tooth has a second protrusion at its lower end; A first flow channel is formed between the first protrusion and the blade, and a second flow channel is formed between the second protrusion and the blade.

2. The magnetic levitation impeller for reducing stirring resistance as described in claim 1, characterized in that, The first wave-generating tooth and the second wave-generating tooth have the same structure.

3. The magnetically levitated impeller for reducing stirring resistance as described in claim 1 or 2, characterized in that, The width of the first wave-generating tooth and / or the second wave-generating tooth gradually increases along the blade direction.

4. A bioreactor, characterized in that, It includes a magnetically levitated impeller for reducing stirring resistance as described in any one of claims 1 to 3.

5. The bioreactor as described in claim 4, characterized in that, The outer shell is made of polypropylene.

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