Novel solid nuclear magnetic rotor impeller
By designing a solid nuclear magnetic rotor impeller with an even number of rounded blades, and using polyetheretherketone (PEEK) material and CNC machine tools, the problems of impeller instability, signal interference, and high cost in existing technologies have been solved. This has improved rotor stability and signal uniformity, reduced production and maintenance difficulties, and broken the foreign technology monopoly.
Patent Information
- Application Number
- CN202422868008.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing solid nuclear magnetic rotor impellers suffer from problems such as poor asymmetry in design and materials, complex hydrodynamic performance, complex processing technology, high cost, insufficient thermal stability and durability, resulting in rotor instability, signal interference, difficult maintenance and reliance on foreign technology.
The impeller is designed with an even number of rounded blades, using materials such as polyetheretherketone (PEEK). It is machined using CNC machine tools, and the surface curve of the blades is optimized by combining fluid dynamics simulation to form a smooth and continuous blade chord, which can adapt to a variety of materials and specifications and simplify the processing technology.
It improves rotor stability and signal uniformity, reduces processing costs and maintenance difficulty, extends service life, reduces dependence on foreign technology, and supports independent research and development and innovation.
Smart Images
Figure CN223839396U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solid-state nuclear magnetic resonance technology, specifically a novel solid-state nuclear magnetic resonance rotor impeller. Background Technology
[0002] Solid-state nuclear magnetic resonance (SSNMR) is an analytical technique that studies solid-state samples. Its principle is essentially the same as liquid-state NMR, both based on the principle of nuclear magnetic resonance. When a sample is placed in an external magnetic field, the isotopes of the nuclei with non-zero spin magnetic domains will generate radio frequency resonance under the influence of the external magnetic field. When the resonant radio frequency power is turned off, the spin nuclei will produce characteristic radio frequency microwave signals. These resonance signals can be detected and analyzed to obtain information about the sample's structure, composition, and properties.
[0003] Samples are typically loaded into a solid-state NMR rotor in dry powder form. The rotor is a small, cylindrical structure containing a compacted sample. It rotates at high speed around a direction at 54.74° to the static magnetic field (magic angle rotation technique, MAS) to acquire data. The solid-state NMR rotor consists of three parts: the rotor body, the impeller, and the base. Depending on the diameter of the NMR chamber, the sample volume, and the rotation method, rotor sizes are generally available in various specifications, including 7 mm, 4 mm, 3.2 mm, 2.5 mm, 1.9 mm, 1.3 mm, and 0.7 mm.
[0004] In a solid-state NMR rotor, the impeller consists of three parts: blades, a base, and a cap. The blades drive or stabilize the rotor to achieve high-speed, stable rotation; the base supports and fixes the blades; and the cap is the core part connecting the rotor body, used to transmit rotational power. As the most important and critical part of the rotor, the impeller plays an indispensable role, maintaining the stable high-speed rotation of the sample (4 kHz to 111 kHz rpm, with a speed fluctuation range of ±5 rpm).
[0005] Currently, China has not yet achieved independent research and development of solid-state nuclear magnetic resonance (NMR) spectrometers, especially the impeller of the solid-state NMR rotor. As a crucial consumable component of the solid-state NMR rotor, China has not yet achieved independent innovation in its manufacturing. Abroad, major NMR equipment manufacturers (such as Bruker and JEOL) use high-precision plastic mold high-pressure injection molding technology to produce the impeller of the solid-state NMR rotor. This technology uses high temperature and high pressure to inject molten plastic into a mold, which then cools to form a high-precision impeller component. However, these manufacturing technologies have long been subject to foreign blockade and restrictions. Therefore, universities, research institutes, and enterprises can only rely on purchasing NMR rotors and their components from original manufacturers at high prices. These consumables are expensive and used in large quantities, which not only increases research costs but also restricts the independent innovation and development of domestic NMR technology.
[0006] However, existing solid-state nuclear magnetic rotor impellers have the following drawbacks:
[0007] I. Number of impeller blades and appearance design
[0008] For example, major international NMR equipment manufacturers (such as Bruker and JEOL) employ an odd number of blades (e.g., 5 or 7 blades) and thin blade angles when designing solid-state NMR rotor impellers. The disadvantages of this approach include:
[0009] Poor force balance in the inherent symmetrical direction
[0010] The odd number of blades and the sharp angles of the thin blades cause instability and imbalance in the rotor under high-pressure driving airflow. The thin blade tips, which are not strong enough, are easily deformed and lose their rotational inertia balance under high-speed rotation driven by high-speed airflow. This causes vibration and sudden rotor explosion. At best, it affects the weak radio frequency signal of the spectrometer, reduces the sensitivity of the probe, and affects the accuracy and sensitivity of data acquisition. At worst, it causes serious damage to the radio frequency solid probe, damages the stator of the high-priced probe (between 40,000 and 250,000 RMB), has a long repair cycle, seriously causes loss of research funds and delays in the research cycle.
[0011] Poor symmetry
[0012] The sample may focus at certain locations, affecting the uniformity of the sample and the signal intensity during high-speed rotation;
[0013] Complex hydrodynamic performance
[0014] Odd-numbered blades have poor airflow balance, resulting in uneven airflow and heat distribution during high-speed rotation. At the same time, the sharp blades are easily bumped and deformed, which can cause the sample to suddenly burst during rotation and damage the probe.
[0015] Complex processing technology
[0016] The design of odd-numbered blades and thin blades with sharp angles requires more complex processing techniques to ensure the precision of impeller machining, resulting in increased production costs and time.
[0017] Structural characteristics
[0018] During high-speed rotation, the odd number of blades and the sharp angles of the thin blades become stress concentration points, increasing the wear of the impeller blades and shortening their service life.
[0019] Maintenance and cleaning
[0020] The odd number of blades and the pointed shape of the thin blades make cleaning and maintenance of the impeller more difficult, increasing the complexity of maintenance.
[0021] II. Impeller Machining Materials
[0022] For example, major international NMR equipment manufacturers (such as Bruker and JEOL) often use polyimide (SP1) as the material for processing solid NMR rotor impellers. The disadvantages of this approach include:
[0023] High cost
[0024] Polyimide materials are typically expensive to produce and process, and have low strength, making them highly susceptible to rotor impeller deformation from impacts, which affects the overall cost-effectiveness of rotor production.
[0025] thermal stability
[0026] Although polyimide has good thermal stability, its performance will decrease under extreme environmental conditions (high temperature, low temperature, acid and alkali environment);
[0027] Easy to age
[0028] In a high-speed rotating environment over a long period of time, polyimide will experience aging, which will affect its mechanical properties.
[0029] hygroscopic
[0030] Polyimide is sensitive to moisture, which leads to hygroscopicity and thus affects the electrical insulation and mechanical properties of the impeller.
[0031] Processing difficulty
[0032] Polyimide has high requirements for processing and molding, which increases the complexity and time of production.
[0033] III. Impeller Machining Technology
[0034] For example, in foreign countries, major NMR equipment manufacturers (such as Bruker and JEOL) mostly use high-precision plastic mold high-pressure injection technology to produce the impellers of solid-state NMR rotors. This technology uses high pressure to inject molten plastic into a mold, which then cools to form a high-precision impeller component. The disadvantages of this approach include:
[0035] High-pressure injection molding technology for plastic molds has disadvantages such as high mold cost, unsuitability for small-scale production, complex process parameters, complicated operation, high requirements for technical personnel, molding defects, material limitations, and environmental pollution. Summary of the Invention
[0036] The purpose of this invention is to provide a novel solid nuclear magnetic rotor impeller to solve the inherent defects of impellers, the limitations of materials, and the cumbersome processing methods mentioned in the background art.
[0037] To achieve the above objectives, this utility model provides the following technical solution: a novel solid nuclear magnetic rotor impeller, comprising an impeller cap, an impeller base being provided at the upper end of the impeller cap, and impeller blades being provided at the upper end of the impeller base;
[0038] The outer wall of the impeller blade is provided with multiple rounded blade lobes. The top edge of the multiple rounded blade lobes is designed with a smooth curve to enhance the transition. The curves on the surface of the multiple rounded blade lobes are optimized by fluid dynamics simulation and are seamlessly connected according to a predetermined geometric law to form a smooth and continuous blade chord. The blade chord extends along the direction from the leading edge to the trailing edge of the blade.
[0039] The number of the multiple rounded leaf lobes is an even number;
[0040] The impeller blades, impeller base, and impeller cap are all made of polyetheretherketone (PEEK), or zirconium oxide, boron nitride, quartz, ceramic, silicon carbide, graphite, or diamond.
[0041] In order to improve the rotational speed of the rotor, enhance the signal strength and resolution of the sample, ensure the stability of the rotational speed, and improve the overall performance of the rotor, the total height of the impeller blades, impeller base and impeller cap is preferably controlled between 0.7 mm and 8 mm, and the blade diameter is between 10 mm and 0.7 mm.
[0042] To meet the requirements of high-speed and high-stability applications, while also taking into account the application requirements at lower speeds, and to increase the passive thrust and hydrodynamic efficiency of the rotor while maintaining good performance, the preferred solid nuclear magnetic rotor impeller of this invention has an included angle between two adjacent rounded blades in the range of 30° to 90°.
[0043] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0044] By setting the number of impeller blades to an even number and designing each blade tip with rounded corners, and using a smooth curve to reinforce the transition at the tips of multiple rounded blades, a set of optimized surface curves is obtained through fluid dynamics simulation optimization of the surface curves of multiple rounded blades. These curves are then seamlessly connected in one go according to a predetermined geometric law, forming a smooth and continuous blade chord (i.e., the direction from the leading edge to the trailing edge of the blade) distribution. This significantly enhances the strength, durability, and tolerance to environmental interference of the impeller blade edges and the overall system. It also reduces stress concentration during high-speed impeller operation and the rotational inertia imbalance effect caused by impeller edge deformation and breakage. This significantly improves the rotational stability and reusability of the impeller and its rotor, facilitating maintenance. Furthermore, it improves flow effects, reduces energy loss, and enhances the uniformity of sample signal measurements. In terms of machining, it can be formed in one operation using a milling cutter and a multi-axis CNC machine tool, eliminating the need for multiple tool adjustments and simplifying the process. This also minimizes accumulated machining errors, reduces machining time, and greatly improves the impeller's forming rate. Polyetheretherketone (PEEK) material possesses excellent wear resistance, high and low temperature resistance, long service life, and easy disassembly. CNC machine tool processing eliminates the need for expensive, single-type molds, offers high machining accuracy, simple toolpaths, stable machining quality, high automation, high yield and production efficiency, is suitable for processing various materials, and minimizes environmental pollution. It also reduces dependence on foreign technology and suppliers, breaking technological monopolies. Attached Figure Description
[0045] Figure 1 This is an overall structural diagram of the present invention;
[0046] Figure 2 This is a diagram showing the external structure of the impeller blades of this utility model;
[0047] Figure 3 This is an external structural diagram of the impeller base of this utility model;
[0048] Figure 4 This is a diagram showing the external structure of the impeller cap of this utility model.
[0049] In the diagram: 1. Impeller blades; 2. Impeller base; 3. Impeller cap; 4. Rounded blade lobes; 5. Blade chord. Detailed Implementation
[0050] Please see Figures 1 to 4 A novel solid nuclear magnetic rotor impeller includes an impeller cap 3, an impeller base 2 is provided at the upper end of the impeller cap 3, and an impeller blade 1 is provided at the upper end of the impeller base 2.
[0051] The outer wall of the impeller blade 1 is provided with multiple rounded blade lobes 4. The top edge of the multiple rounded blade lobes 4 is a smooth curve reinforced transition design. The curves on the surface of the multiple rounded blade lobes 4 are optimized by fluid dynamics simulation and are seamlessly connected according to a predetermined geometric law to form a smooth and continuous blade chord 5. The blade chord 5 extends along the direction from the leading edge to the trailing edge of the blade.
[0052] The number of multiple rounded leaf lobes is even;
[0053] Impeller blades 1, impeller base 2, and impeller cap 3 are all made of polyetheretherketone, or zirconium oxide, boron nitride, quartz, ceramic, silicon carbide, graphite, or diamond.
[0054] In this embodiment: First, the number of rounded leaf lobes 4 is set to an even number:
[0055] 1. It has natural force symmetry stability and high rotational inertia stability, which can effectively reduce vibration caused by accidental factors and enhance the stability of rotational speed under high speed.
[0056] 2. Good symmetry, uniform mass and airflow distribution, reduced vortex effect, more balanced rotor at high speed, and improved resistance to accidental destructive effects of unstable airflow.
[0057] 3. It has good hydrodynamic properties, which can effectively improve the flow effect, reduce energy loss, and improve the uniformity of sample signal measurement;
[0058] 4. Easy to process and manufacture; symmetry simplifies the milling path, significantly improving machining accuracy, yield, and product quality.
[0059] 5. It is adaptable to various rotor bodies of different specifications and models, and has strong flexibility and adaptability.
[0060] Secondly, through the rounded corner design of multiple rounded blade 4, the smooth curves at the top edges of the multiple rounded blade 4 to enhance the transition design, and the optimization of the curves on the surface of the multiple rounded blade 4 through fluid dynamics simulation, a smooth and continuous blade chord 5 design is formed.
[0061] 1. It reduces the stress concentration of impeller blade 1 during high-speed operation, enabling it to withstand higher rotational speeds;
[0062] 2. The rounded corner blades 4 reduce the wear of the impeller blades 1 during high-speed operation, and the tips of the rounded corner blades 4 are not easily deformed. The top edges of multiple rounded corner blades 4 are designed with smooth curves to strengthen the transition. At the same time, the curves on the surface of multiple rounded corner blades 4 are optimized by fluid dynamics simulation and are seamlessly connected according to the predetermined geometric law to form a smooth and continuous blade chord 5. The blade chord 5 extends along the direction from the leading edge to the trailing edge of the blade. This will not cause eddy current stress concentration at high speeds, extend its service life, and enhance the overall strength of the impeller blades 1. It is durable and not easily deformed or chipped.
[0063] 3. It improves the smoothness of the high-speed, high-pressure air fluid edge flow, greatly improves the fluid dynamics performance, and reduces the unbalanced moment of inertia caused by impeller edge deformation;
[0064] 4. It increases the simplicity of processing. The CNC machine tool can form the shape in one operation without the need for multiple milling cutter retractions. The cumulative processing error is low, the processing efficiency is high, and the yield is high. The optimized processing program can achieve a measured yield of 98%, which greatly reduces the processing cost.
[0065] 5. Easy to maintain and clean, leaves no dead corners, and has a high reuse rate.
[0066] Furthermore, in terms of processing methods, CNC machine tools (four-axis milling and turning composite machine tools, five-axis and above linkage machine tools) should be selected.
[0067] 1. It eliminates the need for expensive, single-type molds, achieves high processing precision, has a simple tool path, and provides stable processing quality. It reduces dependence on foreign technologies and suppliers, breaks technological monopolies, helps improve independent R&D capabilities, reduces reliance on the international market, and enhances supply chain security. Independent R&D and production of key experimental equipment aligns with national strategic goals, supports scientific research and independent technological innovation, and enhances international competitiveness.
[0068] 2. It can perform multi-axis linkage and process parts with complex shapes;
[0069] 3. Saves labor costs, has a high degree of automation, and high production efficiency;
[0070] 4. Applicable to the processing of various materials with minimal environmental pollution.
[0071] Furthermore, the impeller blades 1, impeller base 2, and impeller cap 3 are preferably made of polyetheretherketone (PEEK), but can also be made of zirconium oxide, boron nitride, quartz, ceramic, silicon carbide, graphite, or diamond.
[0072] 1. Longer service life: Polyetheretherketone (PEEK) has extremely high mechanical strength and wear resistance, and can still operate stably even at high speeds. Compared with SP1, PEEK has less wear under harsh conditions, extending the service life of the impeller.
[0073] 2. Improve system performance: The rigidity and high-temperature properties of polyetheretherketone (PEEK) material can help reduce the deformation of the impeller at high speeds and improve efficiency, making it especially suitable for demanding solid-state NMR experiments;
[0074] 3. High adaptability: Polyetheretherketone (PEEK) can adapt to a variety of extreme environments, such as high temperature, corrosive liquids or gases.
[0075] 4. High reusability and easy disassembly: The rotor is immersed in liquid nitrogen and the rotor body can be separated from the impeller in a short time (about 1 minute). There is no need to use a rotor sampler, which simplifies the disassembly process of the rotor and impeller. It can be warmed up and reused in a few minutes at room temperature.
[0076] Finally, it should be noted that, depending on the diameter of the NMR cavity, the sample volume, and the rotation method, the rotor size is generally divided into different specifications such as 7 mm, 4 mm, 3.2 mm, 2.5 mm, 1.9 mm, 1.3 mm, and 0.7 mm. Therefore, the design of impeller blade 1 can also have the above-mentioned different specifications. The overall length of the impeller is controlled within the range of 0.7 mm to 8 mm, and the diameter of the blade is designed within the range of 10 mm to 0.7 mm.
[0077] In this case, a rotor of 3.2 mm is used as an example. The specific parameters are as follows:
[0078] 1. Overall impeller height: 6 mm, deviation ±0.01 mm
[0079] 2. Impeller blade diameter: 3.2 mm, deviation ±0.01 mm
[0080] 3. Impeller blade height 1: 2 mm, deviation ±0.01 mm
[0081] 4. Impeller base 2 height: 1 mm, deviation ±0.01 mm
[0082] 5. Impeller cap height: 3 mm, deviation ±0.01 mm
[0083] 6. Impeller cap 3 diameter: 3 mm, deviation ±0.01 mm
[0084] In the entire impeller design scheme, all deviations of each part are required to be less than 5mm. The attached figure in this article is drawn with the rotor at a scale of 3.2mm, and the number of rounded blades 4 is set to six.
[0085] As a technical innovation of this utility model, the total height of the impeller blade 1, the impeller base 2 and the impeller cap 3 is controlled between 0.7 mm and 8 mm, and the diameter of the impeller blade 1 is designed to be between 10 mm and 0.7 mm.
[0086] In this embodiment: the shorter impeller can effectively reduce the volume of the sample chamber, allowing more samples to be accommodated and effective solid-state NMR experiments to be conducted. At the same time, it also helps to increase the rotational speed of the rotor and enhance the signal strength and resolution of the sample.
[0087] Secondly, a shorter impeller can reduce kinetic energy loss during rotation, enabling more efficient transmission of rotational force and improving the overall performance of the rotor.
[0088] The small size design makes it easier to avoid resonance, ensures the stability of the rotation speed during the experiment, and is highly adaptable, able to meet the needs of different types of solid-state NMR experiments and samples, thus providing greater flexibility.
[0089] As a technical optimization of this utility model, the included angle between two adjacent rounded leaflets 4 is between 30° and 90°.
[0090] In this embodiment: small angle (close to 30°): suitable for applications requiring high speed, which helps to improve rotor stability and reduce air resistance.
[0091] Large angle (close to 90°): Suitable for lower speed applications, it increases the rotor's driving force and hydrodynamic efficiency, and is suitable for maintaining good performance at lower speeds.
[0092] Working principle: First, set the number of rounded leaf lobes (4) to an even number:
[0093] 1. It has natural force symmetry stability and high rotational inertia stability, which can effectively reduce vibration caused by accidental factors and enhance the stability of rotational speed under high speed.
[0094] 2. Good symmetry, uniform mass and airflow distribution, reduced vortex effect, more balanced rotor at high speed, and improved resistance to accidental destructive effects of unstable airflow.
[0095] 3. It has good hydrodynamic properties, which can effectively improve the flow effect, reduce energy loss, and improve the uniformity of sample signal measurement;
[0096] 4. Easy to process and manufacture; symmetry simplifies the milling path, significantly improving machining accuracy, yield, and product quality.
[0097] 5. It is adaptable to various rotor bodies of different specifications and models, and has strong flexibility and adaptability.
[0098] Secondly, through the rounded corner design of multiple rounded blade 4, the smooth curves at the top edges of the multiple rounded blade 4 to enhance the transition design, and the optimization of the curves on the surface of the multiple rounded blade 4 through fluid dynamics simulation, a smooth and continuous blade chord 5 design is formed.
[0099] 1. It reduces the stress concentration of impeller blade 1 during high-speed operation, enabling it to withstand higher rotational speeds;
[0100] 2. The rounded corner blades 4 reduce the wear of the impeller blades 1 during high-speed operation, and the tips of the rounded corner blades 4 are not easily deformed. The top edges of multiple rounded corner blades 4 are designed with smooth curves to strengthen the transition. At the same time, the curves on the surface of multiple rounded corner blades 4 are optimized by fluid dynamics simulation and are seamlessly connected according to the predetermined geometric law to form a smooth and continuous blade chord 5. The blade chord 5 extends along the direction from the leading edge to the trailing edge of the blade. This will not cause eddy current stress concentration at high speeds, extend its service life, and enhance the overall strength of the impeller blades 1. It is durable and not easily deformed or chipped.
[0101] 3. It improves the smoothness of the high-speed, high-pressure air fluid edge flow, greatly improves the fluid dynamics performance, and reduces the unbalanced moment of inertia caused by impeller edge deformation;
[0102] 4. It increases the simplicity of processing. The CNC machine tool can form the shape in one operation without the need for multiple milling cutter retractions. The cumulative processing error is low, the processing efficiency is high, and the yield is high. The optimized processing program can achieve a measured yield of 98%, which greatly reduces the processing cost.
[0103] 5. Easy to maintain and clean, leaves no dead corners, and has a high reuse rate.
[0104] Furthermore, in terms of processing methods, CNC machine tools (four-axis milling and turning composite machine tools, five-axis and above linkage machine tools) should be selected.
[0105] 1. It eliminates the need for expensive, single-type molds, achieves high processing precision, has a simple tool path, and provides stable processing quality. It reduces dependence on foreign technologies and suppliers, breaks technological monopolies, helps improve independent R&D capabilities, reduces reliance on the international market, and enhances supply chain security. Independent R&D and production of key experimental equipment aligns with national strategic goals, supports scientific research and independent technological innovation, and enhances international competitiveness.
[0106] 2. It can perform multi-axis linkage and process parts with complex shapes;
[0107] 3. Saves labor costs, has a high degree of automation, and high production efficiency;
[0108] 4. Applicable to the processing of various materials with minimal environmental pollution.
[0109] Furthermore, the impeller blades 1, impeller base 2, and impeller cap 3 are preferably made of polyetheretherketone (PEEK), but can also be made of zirconium oxide, boron nitride, quartz, ceramic, silicon carbide, graphite, or diamond.
[0110] 1. Longer service life: Polyetheretherketone (PEEK) has extremely high mechanical strength and wear resistance, and can still operate stably even at high speeds. Compared with SP1, PEEK has less wear under harsh conditions, extending the service life of the impeller.
[0111] 2. Improve system performance: The rigidity and high-temperature properties of polyetheretherketone (PEEK) material can help reduce the deformation of the impeller at high speeds and improve efficiency, making it especially suitable for demanding solid-state NMR experiments;
[0112] 3. High adaptability: Polyetheretherketone (PEEK) can adapt to a variety of extreme environments, such as high temperature, corrosive liquids or gases.
[0113] 4. High reusability and easy disassembly: The rotor is immersed in liquid nitrogen, and the rotor body can be separated from the impeller in a short time (about 1 minute). There is no need to use a rotor sampler, which simplifies the disassembly process of the rotor and impeller. It can be warmed up and reused in a few minutes at room temperature.
[0114] By controlling the total height of impeller blade 1, impeller base 2 and impeller cap 3 to between 0.7 mm and 8 mm, and designing the diameter of impeller blade 1 to between 10 mm and 0.7 mm, the shorter impeller can effectively reduce the volume of the sample chamber, allowing more samples to be accommodated and effective solid-state NMR experiments to be conducted. At the same time, it also helps to increase the rotation speed of the rotor and enhance the signal intensity and resolution of the sample.
[0115] Secondly, a shorter impeller can reduce kinetic energy loss during rotation, enabling more efficient transmission of rotational force and improving the overall performance of the rotor.
[0116] The small size design makes it easier to avoid resonance, ensures the stability of the rotation speed during the experiment, and is highly adaptable, able to adapt to different types of solid NMR experiments and sample requirements, and has greater flexibility;
[0117] By setting the included angle between two adjacent rounded blades 4 in the range of 30° to 90°, the smaller angle (close to 30°) is suitable for applications requiring high speeds, helping to improve rotor stability and reduce air resistance.
[0118] Large angle (close to 90°): Suitable for lower speed applications, it increases the rotor's driving force and hydrodynamic efficiency, and is suitable for maintaining good performance at lower speeds.
[0119] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A novel solid nuclear magnetic rotor impeller, comprising an impeller cap (3), characterized in that: The upper end of the impeller cap (3) is provided with an impeller base (2), and the upper end of the impeller base (2) is provided with impeller blades (1). The outer wall of the impeller blade (1) is provided with multiple rounded blade lobes (4). The top edge of the multiple rounded blade lobes (4) is a smooth curve reinforced transition design. The curves on the surface of the multiple rounded blade lobes (4) are optimized by fluid dynamics simulation and are seamlessly connected according to the predetermined geometric law to form a continuous blade chord (5). The blade chord (5) extends along the direction from the leading edge to the trailing edge of the blade. The number of the multiple rounded leaf lobes (4) is an even number; The impeller blades (1), impeller base (2), and impeller cap (3) are all made of polyetheretherketone, or zirconium oxide, boron nitride, quartz, ceramic, silicon carbide, graphite, or diamond.
2. The novel solid-state nuclear magnetic rotor impeller according to claim 1, characterized in that: The total height of the impeller blades (1), impeller base (2) and impeller cap (3) is controlled between 0.7 mm and 8 mm, and the blade diameter is between 10 mm and 0.7 mm.
3. The novel solid-state nuclear magnetic rotor impeller according to claim 1, characterized in that: The angle between two adjacent rounded leaflets (4) is between 30° and 90°.