A5054224353- Piezoelectric Actuators and Control
- Acoustic Wave Resonator Technologies
- Advanced MEMS and NEMS Technologies
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor Technologies Research
- Microfluidic and Capillary Electrophoresis Applications
- Hydraulic and Pneumatic Systems
- Flow Measurement and Analysis
- Advanced Sensor and Energy Harvesting Materials
- Magnetic Properties and Applications
- Electric Motor Design and Analysis
- Heat Transfer and Boiling Studies
- Microfluidic and Bio-sensing Technologies
- Advanced Machining and Optimization Techniques
- Aerosol Filtration and Electrostatic Precipitation
- Non-Destructive Testing Techniques
- High voltage insulation and dielectric phenomena
- Shape Memory Alloy Transformations
- Thermal Analysis in Power Transmission
University of Science and Technology of China
2019-2022
Dielectric contents, such as air bubbles and water droplets in the lubricating oil, can severely interfere with performance of inductive debris sensor due to effect coil parasitic capacitance. This study proposes a special mesh screen that effectively eliminate interference triple-coil avoid false alarms increase productivity. Experimental results show detect 353 μm (D) ferrous particles 706 nonferrous pipe diameter 50 mm. Comparison experiments indicate droplet volume 697 mm3 generate an...
Abstract A resonant piezoelectric pump using a displacement-amplifying vibrator is proposed in this paper to improve the output pressure of pump. The composed and body. consists two amplifiers stacks. body comprises piston shaft, an orifice plate, valve body, check valves runner plate. clearance exists between shaft groove designed on sealed by O-rings. works state, which has large amplitude. In paper, working principle introduced influencing factors are theoretically analyzed. frequency...
The high-frequency eddy current loss limits the output speed of giant magnetostrictive actuator (GMA). This paper investigates a GMA using laminated silicon steel core. Compared with integral core, core can reduce equivalent conductivity and currents. structure reduces magnetic reluctance increases field intensity in material rod. Therefore, large vibration amplitude under field. At sinusoidal excitation 35 A (rms) @ 2 kHz, is 11.1 µm 4 which 44.2% higher than that indicates beneficial to...
This paper proposes a piezohydraulic hybrid actuator driven by resonant vibrator based on two rhombic micro-displacement amplifiers. The consists of piezoelectric vibrator, pump body, manifold, return valve, and an output cylinder. vibration mode the is simulated, working principle depicted. Then, performance experimentally investigated, effects exciting frequency, voltage, bias pressure are analyzed. results demonstrate that performs best when frequency near frequency; meanwhile, higher...
Piezoelectric ceramics are often subjected to heavy loading. Piezoceramic sheets essential elements of piezoelectric devices. The vibration amplitudes and static capacitances PZT5 soft discs with Φ10 × 1mm3 PZT4 hard 7 0.7mm3 under compressive stress studied. experimental results show that the properties improved within 200 MPa, can withstand up 500 MPa without depolarization. both piezoceramics decrease linearly increasing stress. And have potential improving work capability significantly high
This paper proposes a rhombic micro-displacement amplifying vibrator piezoelectric pump which introduces mechanism called “compressible space” near inlet and outlet valves. The working principle of compressible space is presented simulation conducted to verify the effect. Analysis reveals that can reduce transmission time pressure wave thus increasing efficiency valves, suppress fluctuation due rapid closing shows in pipe relieved instantaneous be mostly absorbed with presence space. Then...
SF6 gas is widely used in many fields because of its good insulating property and arc-extinguishing property. However, the emission waste also accelerates global temperature warming. The performance gap a core efficient utilization exhaust treatment. Therefore, it very important to study influencing factors gap. Due inevitable dust particles production maintenance environment equipment, this article studies influence on small at atmospheric pressure. experimental results indicate that...
The resonant frequency difference of piezoelectric transformers (PTs) with a classical parallel connection could worsen system performance, then the mechanical coupling PTs was proposed to avoid disadvantage. Experimental results showed that when relatively small, performance and similar. However, increased, maximum output power at temperature rise 20 °C reduced by 32.6% 7.7%. This indicated better than in improving PTs.
The effective bulk modulus of hydraulic oil can greatly affect the dynamic characteristics and performance power system, in this study, a new method based on piezoelectric transducers for investigating fluid dynamically is proposed. In measurement, alternately compressed by actuator ceramic sheet served as sensor chamber detect pressure variation output alternating voltage, which reflect oil. Then effects working up to 10 MPa whether exhaust air are experimentally studied. experimental...