Magnetic suspension impeller capable of reducing stirring resistance and bioreactor

Abstract

The invention discloses a magnetic suspension impeller capable of reducing stirring resistance, which comprises a two-pole magnet, a shell and a plurality of blades, and is characterized in that the shell is used for covering 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 invention also discloses a bioreactor which comprises the magnetic suspension impeller for reducing the stirring resistance in the previous 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] The invention relates to the technical field of magnetic suspension impellers, in particular to a magnetic suspension impeller and a bioreactor capable of reducing stirring resistance. Background Art

[0002] The magnetic levitation impeller has a large resistance and low stability during the stirring process of the liquid, so it is necessary to reduce the resistance during its operation to improve its stability. There are two main existing methods for improving the operating stability of the magnetic levitation impeller: One is to add a "fin stabilizer" to the end of a single blade of the impeller. The "fin stabilizer" is an artificial "shark fin" that helps reduce the roll of the impeller when it rotates in the liquid, but the "fin stabilizer" has limited ability to improve roll.

[0003] The second is to connect all the impellers together through the "bilge keel". The "bilge keel" can enhance the wave resistance of the impeller, but with the increase of the speed, the damping of the impeller itself increases, and the relative proportion of the damping generated by the "bilge keel" in the total damping decreases, and its anti-rolling ability also decreases accordingly; on the other hand, adding the "bilge keel" will increase the rotational inertia of the impeller, resulting in an increase in the control current of the motor, which increases the energy consumption and increases the difficulty of controlling the impeller at high speeds. Summary of the invention

[0004] According to an embodiment of the present invention, a magnetic suspension impeller for reducing stirring resistance is provided, comprising a two-pole magnet, a shell and a plurality of blades, wherein the shell is used to cover the two-pole magnet; The front end of the blade is symmetrically provided with a first wave-making tooth and a second wave-making tooth; A first protrusion is provided at the upper end of the first wave-making tooth, and a second protrusion is provided at the lower end of the second wave-making tooth; 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.

[0005] Furthermore, the first wave making tooth and the second wave making tooth have the same structure.

[0006] Furthermore, the width of the first wave-making tooth and / or the second wave-making tooth gradually widens along the blade direction.

[0007] According to yet another embodiment of the present invention, a bioreactor is provided, comprising the magnetic levitation impeller for reducing stirring resistance of the previous embodiment.

[0008] Furthermore, the shell is made of polypropylene.

[0009] The beneficial effects of the present invention are as follows: when used in the liquid mixing system in the biopharmaceutical field, the function of quickly and effectively mixing materials such as culture medium and buffer solution is realized; during operation, the impeller can effectively eliminate the wave-making resistance and improve the stability of the impeller operation; at the same time, the driving current of the motor can be reduced, thereby reducing the power consumption.

[0010] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A three-dimensional diagram of a magnetic suspension impeller for reducing stirring resistance according to a first embodiment of the present invention; Figure 2 A schematic diagram of the rotation direction of a magnetic suspension impeller for reducing stirring resistance according to a first embodiment of the present invention; Figure 3 A schematic diagram of the relationship between the two-pole magnet and the housing of a magnetic suspension impeller for reducing stirring resistance according to a first embodiment of the present invention; Figure 4 A schematic diagram of generating waves by a magnetically suspended impeller for reducing stirring resistance according to a first embodiment of the present invention; Figure 5 It is a schematic diagram of an impeller with a "stabilizing fin" in the prior art; Figure 6 A schematic diagram of an impeller with a "bilge keel" in the prior art; In the figure, 1, two-pole magnet; 2, outer shell; 3, blade; 4, first wave-making tooth; 41, first protrusion; 42, first flow channel; 5, second wave-making tooth; 51, second protrusion; 52, second flow channel; 6, fin stabilizer; 7, bilge keel. DETAILED DESCRIPTION

[0012] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0013] First, combine Figures 1 to 4 A magnetic levitation impeller for reducing stirring resistance according to an embodiment of the present invention is described, which is used in the field of biopharmaceutical technology and has a wide range of application scenarios.

[0014] like Figures 1 to 4 As shown, the magnetic suspension impeller for reducing stirring resistance according to the embodiment of the present invention comprises a two-pole magnet 1, a shell 2 and a plurality of blades 3, wherein the shell 2 is used to cover the two-pole magnet 1; The first wave-making teeth 4 and the second wave-making teeth 5 are symmetrically arranged at the front end of the blade 3. The waveforms generated by the first wave-making teeth 4 and the second wave-making teeth 5 offset the waveforms generated by the blade 3, thereby reducing the "wave-making resistance", greatly improving the stability of the impeller operation, and reducing the driving energy consumption of the motor.

[0015] About wave-making resistance: During the stirring process, the impeller blade 3 will split the liquid surface, and the water surface in the area where the blade 3 moves forward will rise; then the rising water surface will drop immediately, forming a "wave", which will move along the edge of the blade 3 and behind the blade 3. This process is called "wave-making resistance". The contact area between the blade 3 and the liquid increases, resulting in an increase in the resistance of the liquid. This phenomenon is called "wave-making resistance".

[0016] A first protrusion 41 is provided at the upper end of the first wave-making tooth 4, and a second protrusion 51 is provided at the lower end of the second wave-making tooth 5; during the rotation of the blade 3, the first protrusion 41 offsets the waveform generated at the upper end of the blade 3, and the second protrusion 51 offsets the waveform generated at the lower end of the blade 3.

[0017] 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 water flow through.

[0018] Further, if Figure 1 As shown, in this embodiment, the first wave making tooth 4 and the second wave making tooth 5 have the same structure.

[0019] Further, if Figure 1 As shown, in this embodiment, the width of the first wave making tooth 4 and / or the second wave making tooth 5 gradually widens along the direction of the blade 3 .

[0020] During the rotation, the blade 3 rotates in a clockwise direction, and the waves generated by the blade 3 are offset by the waves generated by the first wave-making teeth 4 and the second wave-making teeth 5.

[0021] According to a second embodiment of the present invention, a bioreactor is provided, comprising the magnetically suspended impeller for reducing stirring resistance of the previous embodiment.

[0022] Further, if Figure 3 As shown, in this embodiment, the shell 2 is made of polypropylene, which is heat-resistant, corrosion-resistant and light in weight.

[0023] Above, refer to Figures 1 to 4 A magnetic levitation impeller and a bioreactor for reducing stirring resistance according to an embodiment of the present invention are described, which are used in a liquid mixing system in the biopharmaceutical field to achieve the function of quickly and effectively mixing materials such as culture medium and buffer solution; during operation, the impeller can effectively eliminate wave-making resistance and improve the stability of the impeller operation; at the same time, it can reduce the driving current of the motor and reduce power consumption.

[0024] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0025] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A magnetically suspended impeller for reducing stirring resistance, comprising a two-pole magnet, a shell and a plurality of blades, wherein the shell is used to cover the two-pole magnet; characterized in that: The front end of the blade is symmetrically provided with a first wave-making tooth and a second wave-making tooth; A first protrusion is disposed at the upper end of the first wave-making tooth, and a second protrusion is disposed at the lower end of the second wave-making tooth; 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 according to claim 1, characterized in that: The first wave making tooth and the second wave making tooth have the same structure.

3. The magnetic levitation impeller for reducing stirring resistance according to claim 1 or 2, characterized in that: The width of the first wave-making tooth and / or the second wave-making tooth gradually widens along the blade direction.

4. A bioreactor, characterized in that: The invention comprises a magnetically suspended impeller for reducing stirring resistance as described in any one of claims 1 to 3.

5. The bioreactor according to claim 4, characterized in that The shell is made of polypropylene.

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