Suspension motor device based on acoustic superstructure vibration diversion

Abstract

The invention discloses a suspension motor device based on acoustic superstructure vibration diversion. Comprising propellers, rotors, stators, piezoelectric patches, balancing weights, bolts, nuts and the like. When the suspension motor device works, an external power supply drives the piezoelectric plate to generate a high-frequency electric signal, the electric signal is converted into mechanical vibration through the ultrasonic transducer, vibration energy is transmitted upwards through the stator, ultrasonic exciting force in the vertical direction is formed on the contact surface of the stator and the rotor, a gap is formed between the stator and the rotor, and an airflow layer is formed. Wherein inverted groove arrays are machined in the rotor and on the surface of the stator, inverted grooves serve as acoustic superstructure flow guide elements, the contours of the inverted grooves have constraint on acoustic streams, the acoustic streams flow in the inverted grooves along preset paths, a directional acoustic flow field is formed to push the rotor to move upwards, and suspension of the motor device is achieved. According to the invention, the acoustic superstructure is used for vibration diversion, and the inverted groove array structure is combined with ultrasonic excitation, so that self-driven rotation of the propellers, bamboo dragonflies and other motor devices is realized, and a non-contact suspension state is achieved.

Description

Technical Field

[0001] The invention relates to a suspension motor device based on acoustic superstructure vibration diversion. Background Art

[0002] In the field of interdisciplinary research on ultrasonic technology and fluid dynamics, traditional motor devices based on contact transmission modes have long faced a series of technical difficulties. The continuous contact between mechanical components leads to prominent wear problems, resulting in significant losses during the energy conversion process, and the maintenance costs of the equipment throughout its life cycle remain high. On the other hand, although the existing ultrasonic suspension technology has broken through the limitations of traditional contact support, its acoustic flow field control mechanism has inherent defects. At present, most ultrasonic suspension devices still rely on a single plane vibration excitation method and lack a structural constraint design for the acoustic flow propagation path. This design defect directly leads to significant unevenness in the spatial distribution of the suspension force, making it difficult to ensure the dynamic stability of the system and low efficiency in collaboration with the rotary drive mechanism.

[0003] In applications requiring self-driven rotation, traditional solutions often employ the addition of mechanical transmission components, such as couplings and reducers. While this configuration strategy expands functionality, it significantly increases overall system complexity. This comes with increased energy transmission losses and hysteresis in motion response caused by the mechanical transmission chain. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a suspension motor device based on acoustic superstructure vibration guidance that can solve the problems of contact loss and ultrasonic suspension drive efficiency of traditional motors and realize non-contact suspension and controllable rotation.

[0005] Technical solution: The present invention relates to a suspension motor device based on acoustic superstructure vibration guidance, comprising a stator, an ultrasonic transducer, a piezoelectric sheet, a counterweight, bolts and nuts;

[0006] A rotor is attached to the surface of the stator, and a propeller is installed on the upper portion of the rotor.

[0007] Furthermore, the counterweight is connected to the piezoelectric sheet via bolts and nuts and is fixedly mounted in the axial middle of the device.

[0008] Furthermore, an array of inverted grooves matching the rotor is provided on the surface of the stator.

[0009] Furthermore, a coating is provided on the surface of the propeller, and the coating thickness is 0.02-0.05 mm; and the pitch angle of the propeller is controlled between 15° and 25°.

[0010] Furthermore, the rotor is installed on the top of the device and is made of aluminum alloy, with its interior matching the surface of the stator.

[0011] Furthermore, the stator is made of titanium alloy.

[0012] Furthermore, the input voltage range of the ultrasonic transducer is 100-220V AC, which is converted into an adaptive high-frequency electrical signal through the power conversion module, with a frequency range of 20-40kHz.

[0013] Furthermore, the piezoelectric sheet is mounted on a circuit board in the device and connected to an external power drive circuit by welding, and includes four piezoelectric sheets, namely piezoelectric sheet 1, piezoelectric sheet 2, piezoelectric sheet 3 and piezoelectric sheet 4;

[0014] The operating voltage range of the piezoelectric piece is 5-20V DC. Driven by this voltage, it generates a high-frequency electrical signal with a frequency range of 20-40kHz, and the amplitude fluctuation range of the output signal is controlled within ±5%.

[0015] Furthermore, a plurality of mounting holes are reserved on the device for adjusting the mounting position and number of the counterweight blocks according to actual needs.

[0016] Furthermore, the inverted grooves are formed by CNC milling technology, and the inverted grooves inside the rotor and on the surface of the stator are evenly distributed and fit together in a pipe shape, with a groove depth of 3-5mm, a groove width of 2-3mm, and an array spacing of 8-10mm.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following significant features: 1. The acoustic superstructure and ultrasonic vibration work together to form an acoustic flow field between the stator and the rotor, realizing non-contact suspension drive, and effectively solving the problems of contact wear, energy loss and high maintenance costs of traditional motors; 2. The inverted groove array constrains the acoustic flow path, combined with the frequency matching of the ultrasonic transducer and the piezoelectric piece, to concentrate the sound energy to form a stable directional acoustic flow field, and significantly improve the acoustic flow guidance accuracy and energy utilization rate; 3. The propeller adopts aerodynamic optimization and dynamically cooperates with the ultrasonic excitation force to achieve self-driven rotation in a suspended state. The counterweight block adjusts the center of gravity through bolts to enhance the stability of the device and ensure the controllability of the suspension height and rotation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is an exploded schematic diagram of each component in the device of the present invention;

[0020] Figure 3 It is a component diagram of the stator and rotor at different angles in the present invention;

[0021] In the figure: 1 is the propeller, 2 is the rotor, 3 is the stator, 4 is the ultrasonic transducer, 5 is the piezoelectric sheet, 5(a) is the piezoelectric sheet one, 5(b) is the piezoelectric sheet two, 5(c) is the piezoelectric sheet three, 5(d) is the piezoelectric sheet four, 6 is the counterweight, and 7 is the bolts and nuts. DETAILED DESCRIPTION

[0022] The specific technical solutions of the present invention are further described in detail below with reference to specific examples.

[0023] As shown in the figure, the present invention describes a levitation motor device based on acoustic superstructure vibration guidance. An external power source drives a piezoelectric plate to generate a high-frequency electrical signal, which is converted into mechanical vibrations by an ultrasonic transducer and transmitted to the stator. This generates an ultrasonic excitation force at the contact surface between the stator and rotor. The inverted groove array on both surfaces constrains the acoustic flow path, forming a directional acoustic flow field that propels the rotor into levitation, while the propeller achieves self-driven rotation. By coupling the acoustic superstructure with ultrasonic vibration, the levitation motor device addresses the issues of contact loss and ultrasonic levitation drive efficiency in traditional motors, achieving contactless levitation and controllable rotation. Suitable for applications such as micro-aircraft and precision drives, the levitation motor device enables precise control of the acoustic flow field, stable levitation, and controllable rotation. The device comprises a propeller 1, a rotor 2, a stator 3, an ultrasonic transducer 4, a piezoelectric plate 5, a counterweight 6, bolts, and nuts 7.

[0024] The rotor 2 in the suspension motor device is installed on the overall top of the device, its interior is in contact with the surface of the stator 3, and is processed with an inverted groove array. The ultrasonic transducer 4 is connected to the piezoelectric sheet 5, receives the high-frequency electrical signal generated by the piezoelectric sheet 5 and converts it into mechanical vibration, which is transmitted to the stator 3. The counterweight block 6 is connected by bolts and nuts 7 and is installed and fixed in the axial middle part of the device to adjust the center of gravity. The propeller 1 is installed on the upper part of the rotor 2 of the device to realize the self-driven rotation function.

[0025] The rotor 2 is made of aluminum alloy with low density and high strength. At the same time, its interior is matched with the surface of the stator 3 and is processed into a tubular inverted groove array.

[0026] The stator 3 is made of titanium alloy, which has good acoustic properties and is conducive to the transmission and excitation of ultrasonic vibrations.

[0027] The input voltage range of the ultrasonic transducer 4 is 100-220V AC, which is converted into an adaptive high-frequency electrical signal through the power conversion module, with a frequency range of 20-40kHz. Under this operating condition, the ultrasonic transducer 4 can stably convert the electrical signal into mechanical vibration output.

[0028] The piezoelectric sheet 5 includes four piezoelectric sheets, namely piezoelectric sheet 1 5(a), piezoelectric sheet 2 5(b), piezoelectric sheet 3 5(c), and piezoelectric sheet 4 5(d). They are mounted on a circuit board in the device and connected to an external power drive circuit by welding, so as to reliably receive external power drive. The operating voltage range of the piezoelectric sheet 5 is 5-20VDC. Under this voltage drive, a high-frequency electrical signal with a frequency range of 20-40kHz is generated, and the amplitude fluctuation range of the output signal is controlled within ±5%.

[0029] The counterweight 6 is connected by bolts and nuts 7 and installed in the appropriate part of the device. The device has multiple mounting holes reserved, and the installation position and number of the counterweight can be adjusted according to actual needs. By adding or removing the counterweight and changing its installation position, the center of gravity of the device can be adjusted to ensure the stability of the device operation.

[0030] The surface of the propeller 1 is treated with a smooth coating with a coating thickness of 0.02-0.05 mm to reduce fluid resistance; at the same time, it is connected to the drive shaft to ensure power transmission; the blade angle of the propeller 1 is aerodynamically optimized, and the pitch angle is controlled between 15-25° to achieve self-driven rotation function.

[0031] The inverted grooves are formed by CNC milling technology. The inverted grooves inside the rotor 2 and on the surface of the stator 3 are evenly distributed and fit together in a pipe shape. The groove depth is 3-5mm, the groove width is 2-3mm, and the array spacing is 8-10mm, so as to form a stable acoustic superstructure guide function.

[0032] Example

[0033] In this embodiment, the rotor is made of aluminum alloy with a wall thickness of 2 mm. A tubular groove array is machined inside with a groove depth of 4 mm, a groove width of 2.5 mm, and an array spacing of 9 mm. The surface roughness Ra is ensured to be ≤ 1.6 μm through CNC milling technology. The stator 3 is made of titanium alloy with a bottom diameter of 50 mm and a height of 30 mm. The surface grooves correspond to the grooves of the rotor 2 to form a closed acoustic guide channel.

[0034] The input voltage of the ultrasonic transducer 4 is 220V AC, which is converted into a high-frequency electrical signal with a frequency of 30kHz and a voltage of 60V by the power module, with a vibration amplitude of 0.05mm; the propeller 1 is made of carbon fiber composite material, with a pitch angle of 20°, a diameter of 30mm, and a surface coating thickness of 0.03mm, and is connected to the drive shaft via a key; the counterweight block 6 has a mass of 50g and is installed in the reserved hole in the middle of the axial direction of the device with M3 bolts, and can be adjusted radially by ±5mm.

[0035] The present invention is based on a levitation motor device of acoustic superstructure vibration guidance, and its implementation includes the following:

[0036] Startup phase: After the external power supply is turned on, the piezoelectric piece 5 receives a 5V DC drive signal, generating a 20kHz high-frequency vibration, which is converted into mechanical vibration by the ultrasonic transducer 4 and transmitted to the stator 3; the contact surface between the stator 3 and the rotor 2 produces a 0.2mm gap due to the vibration, forming an initial airflow layer.

[0037] Suspension and rotation: When the vibration frequency increases to 30kHz, the acoustic flow within the inverted groove array is constrained by the contour, forming an upward directional acoustic flow field, which drives the rotor 2 to levitate, and the suspension height is stabilized at 0.3mm; at the same time, under the action of acoustic flow disturbance and aerodynamics, the propeller 1 self-propelled rotates to 2000rpm, generating auxiliary lift.

[0038] Dynamic adjustment stage: If the device tilts by ±10°, the balanced posture can be restored within 3 seconds by adjusting the radial position of the counterweight block 6; when the load increases and the suspension height decreases, the power module automatically increases the voltage of the piezoelectric piece 5 to 15V and the vibration amplitude to 0.08mm, so that the suspension height returns to the set value.

[0039] After long-term operation tests, the measured transmission efficiency reached 91.2%. Within the frequency range of 20-40kHz, the fluctuation of the hovering height was ≤±0.05mm, and the speed deviation of propeller 1 was ≤±50rpm, meeting the micro-UAV's requirements for stable hovering and rotation. There were no signs of corrosion on all components, and the acoustic performance retention rate was >95%.

[0040] The acoustic superstructure vibration-guided levitation motor device demonstrates cross-domain application potential thanks to its non-contact suspension, efficient acoustic flow drive, and dynamically adjustable characteristics. In the medical field, it can be used to develop a micro-gastrointestinal endoscope thruster, using a medical titanium alloy rotor and a spiral guide groove design, combined with high-frequency ultrasonic vibration to achieve non-invasive in vivo diagnosis and treatment. In semiconductor manufacturing scenarios, its hexagonal suspension platform and closed-loop feedback system can provide submicron precision for wafer transmission, while simultaneously solving anti-static and heat dissipation problems. In the field of deep-sea exploration, the bionic principles of manta rays can be learned, and a wavy inverted groove array and low-frequency acoustic standing wave design can be used to create a tangle-free, low-noise bionic propulsion system, which can be combined with a piezoelectric power generation module to achieve energy self-sustaining.

Claims

1. A suspension motor device based on acoustic superstructure vibration guidance, characterized in that: Including stator, ultrasonic transducer, piezoelectric sheet, counterweight, bolts and nuts; A rotor is attached to the surface of the stator, and a propeller is installed on the upper portion of the rotor.

2. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1 is characterized in that: The counterweight block is connected to the piezoelectric sheet through bolts and nuts and is fixedly installed in the axial middle of the device.

3. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: An inverted groove array matching the rotor is provided on the surface of the stator.

4. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: The surface of the propeller is coated with a coating having a thickness of 0.02-0.05 mm; the pitch angle of the propeller is controlled between 15° and 25°.

5. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: The rotor is mounted on the top of the device and is made of aluminum alloy, with its interior matching the surface of the stator.

6. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: The stator is made of titanium alloy.

7. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: The input voltage range of the ultrasonic transducer is 100-220V AC, which is converted into an adaptive high-frequency electrical signal through the power conversion module with a frequency range of 20-40kHz.

8. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: The piezoelectric sheet is mounted on a circuit board in the device and connected to an external power drive circuit by welding, and includes four piezoelectric sheets, namely, piezoelectric sheet 1, piezoelectric sheet 2, piezoelectric sheet 3 and piezoelectric sheet 4; The operating voltage range of the piezoelectric piece is 5-20V DC. Driven by this voltage, it generates a high-frequency electrical signal with a frequency range of 20-40kHz, and the amplitude fluctuation range of the output signal is controlled within ±5%.

9. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: A plurality of mounting holes are reserved on the device for adjusting the mounting position and number of the counterweight blocks according to actual needs.

10. The levitation motor device based on acoustic superstructure vibration guidance according to claim 1, characterized in that: The inverted grooves are formed by CNC milling technology, and are evenly distributed and matched on the inverted grooves inside the rotor and on the surface of the stator in a pipe shape; wherein, the groove depth is 3-5mm, the groove width is 2-3mm, and the array spacing is 8-10mm.

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