11 results about "Piezoelectric bimorph" patented technology

The application discloses a hollow type rotary piezoelectric motor and a working method thereof, and the motor comprises a rotor, a first bearing, a second bearing, a shell, a base, a stator and a piezoelectric driving module; the stator comprises a fixing ring, three fixing bases, three connecting rods and three driving feet; the piezoelectric driving module comprises six driving units, and each driving unit comprises two piezoelectric bimorphs; the rotor realizes bidirectional super-high-precision positioning rotary motion by controlling the time sequence and frequency of the six driving units, and can realize large torque at low speed and high-precision rotation at high speed; the application has high reliability, large output torque and high precision, and can be widely applied in the fields of precision optics, aerospace, mechanical manufacturing and medical devices.

A piezoelectric vibration energy harvester includes: a first support plate, a second support plate, a piezoelectric bimorph cantilever, a rolling part, a printing raceway, a preloading spring and a bottom plate, the first and second support plates are vertically disposed on the bottom plate, two ends of the piezoelectric bimorph cantilever are respectively connected with the first support plate and the rolling part, an end of the preloading spring is fixed on the second support plate, another end of the preloading spring is movably connected with a back surface of the printing raceway, and a surface opposite to the back surface of the printing raceway is in contact with and coupled with the rolling part. The printing raceway can be obtained by programming the number and initial positions of static equilibrium points, and a multi-stable piezoelectric energy harvester with symmetric or asymmetric potential energy well can be realized.

The application discloses a kind of laser scanning cutting endoscope robots based on carbon fiber paper micro-vibration mirror, the endoscope robot is fixedly installed with paper transmission structure in one end of support structure, and the other end is fixedly installed with GRIN lens;Fixed mirror, X galvanometer and Y galvanometer are fixedly installed in paper transmission structure, and optical path is formed by optical fiber, GRIN lens, fixed mirror, X galvanometer and Y galvanometer;First piezoelectric bimorph driver and second piezoelectric bimorph driver are piezoelectric bimorph driver installed between support structure and paper transmission structure;First piezoelectric bimorph driver is used to drive X galvanometer to rotate around Y axis and / or by paper transmission structure;Second piezoelectric bimorph driver is used to drive Y galvanometer to rotate around Z axis by paper transmission structure.The above-mentioned endoscope robot is compact, light, stable in motion and has excellent dynamic performance by using piezoelectric bimorph driver and paper transmission structure.

The application discloses a rotary piezoelectric motor based on three-phase driving and a working method thereof, and the motor comprises a rotor, a first bearing, a second bearing, a shell, a base, a stator and a piezoelectric driving module; the stator comprises a fixing ring, three fixing bases, three connecting rods and three driving feet; and the piezoelectric driving module comprises three piezoelectric bimorphs. The rotor realizes bidirectional super-high-precision positioning rotary motion by controlling the time sequence and frequency of the three piezoelectric bimorphs, and can realize large torque at low speed and high-precision rotation at high speed. The application adopts macro-micro fusion design, can work in non-resonance mode and resonance mode, has high reliability, large output torque and high precision, and can be widely applied in the fields of precision optics, aerospace, mechanical manufacturing and medical instruments.

The application discloses a kind of linear feeding device and method based on piezoelectric transducer inertia drive, feeding device includes base, first to fourth spring piece, first to second connecting block, piezoelectric transducer, top disc, piezoelectric bimorph, first to third stop piece, and M+N+P adjusting bolts;When working, sine excitation signal is applied to piezoelectric transducer, the second order longitudinal vibration mode of piezoelectric transducer can be excited, to induce the reciprocating bending vibration of spring piece, drive top disc to generate horizontal and vertical direction movement.Material placed in top disc moves forward and upward with top disc in material groove.When spring piece moves to limit position, elastic potential energy stored in spring piece drives top disc to move back, at this time, material continues to move forward and falls under the action of inertia in parabolic curve.Under this periodic motion, the transportation of material in top disc is realized.The application has simple structure, and is easy to process and assemble.

The application discloses a rotary inertial drive piezoelectric vibration feeding device, which comprises a top disc, a material disc, a mass block, a bottom disc and N driving units; the driving unit comprises a piezoelectric bimorph, a connecting block, a gasket, a first spring sheet and a second spring sheet; the material disc and the top disc are coaxially fixedly connected; the N driving units are circumferentially and uniformly arranged between the top disc and the bottom disc and are all connected with the mass block. When working, a specified sinusoidal alternating current signal is applied on the piezoelectric bimorph, the piezoelectric bimorph generates bending vibration, drives the spring sheet to vibrate, and then excites the composite vibration mode of the vertical direction and the torsional direction of the top disc. Under the action of inertia and friction, the material in the material disc can be transported in the specified direction; the amplitude of the top disc and the frequency of the whole machine can be adjusted by changing the volume of the mass block, and the mass block can improve the amplitude of the top disc, reduce the vibration transmitted to the base and improve the stability during the material transportation.

The invention discloses a finite element simulation analysis method for a bimorph permanent magnet mechanical antenna, and belongs to the technical field of antenna design and simulation. The method comprises the following steps: S1, establishing a three-dimensional model comprising a piezoelectric bimorph, a permanent magnet and a background air domain; s2, endowing each component with corresponding material attributes; s3, configuring a solid mechanical field, a magnetic field and a dynamic grid physical field, and setting boundary conditions and excitation; s4, activating piezoelectric effect multi-physical field coupling to realize electricity-force-magnetism indirect coupling; and S5, through transient and steady state analysis solution, outputting vibration mode and radiation magnetic field distribution. According to the method, the working mechanism of the antenna is accurately simulated through high-fidelity multi-physics field coupling simulation, high-cost entity trial-manufacture is effectively replaced, the research and development period is remarkably shortened, and a reliable basis is provided for optimization design of the low-frequency mechanical antenna.

The application discloses a pre-pressure controllable piezoelectric bimorph deformation wing based on a flexible hinge parallel connection and a method. The deformation wing mainly comprises four layers of piezoelectric composite bimorphs fixed at a leading edge, the two sides of the four layers of bimorphs are short and the middle is long, and the four layers of bimorphs are connected in parallel through four interlayer connecting rib structures; the third group of interlayer connecting rib structures are provided with protruding shafts at positions corresponding to the two sides of the rotation shafts of the uppermost and lowermost piezoelectric composite bimorphs, bearings and prefabricated clamping groove bearing sleeves are sleeved on the protruding shafts, polymer spiral winding actuators fixed at the leading edge are sleeved on the bearing sleeves to load and unload axial pressure; one of the two middle layers of longer bimorphs is fixedly connected with a trailing edge, and the other layer can slide in a prefabricated slot at a tail edge; finally, upper and lower skins are fixed with upper and lower sides of a large end of the leading edge, four groups of ribs and upper and lower sides of a large end of the trailing edge in sequence. The application can greatly improve the output power of the pre-compressed piezoelectric bimorph deformation wing and prolong the service life of the piezoelectric bimorph deformation wing.

This invention discloses a two-dimensional laser scanning galvanometer device based on piezoelectric bicrystalline wafer driving, belonging to the field of piezoelectric driven scanning galvanometer technology. It includes a base with a circular hole on its side wall. A laser emitting device, partially penetrating the interior of the base, is installed through this hole. A first deflecting lens group is mounted on the side of the base. Below the first deflecting lens group, a second deflecting lens group is fixed to the base and perpendicular to it. A top cover is mounted on the top of the base. This invention, employing the aforementioned two-dimensional laser scanning galvanometer device based on piezoelectric bicrystalline wafer driving, solves the problems of dynamic performance contradictions, thermal drift, and reliability limitations inherent in existing electromagnetically driven scanning galvanometers. It fundamentally achieves high-bandwidth, low-heat-dissipation, and wear-free precision beam scanning. Furthermore, it is compact, portable, and low-cost, making it suitable for mass production and widespread civilian application.

The invention discloses a piezoelectric bicrystal cantilever beam valveless ultrasonic air pump array working in a second-order mode, and belongs to the technical field of valveless piezoelectric air pumps, the piezoelectric bicrystal cantilever beam valveless ultrasonic air pump array adopts a lamellar structure, and comprises a cantilever beam combination plate positioned in the middle, and fixed plates, a Tesla flow channel inner layer plate and a Tesla flow channel outer layer plate which are symmetrically and fixedly connected to the upper side and the lower side of the cantilever beam combination plate in sequence; a plurality of pairs of piezoelectric bicrystal cantilever beams are symmetrically arranged on the left side and the right side of the cantilever beam combination plate, and I-shaped inner partition plates are arranged at the adjacent positions of the piezoelectric bicrystal cantilever beams. The front end and the rear end of the pump body are fixedly connected in a sealed mode through outer partition plates to form multiple pairs of pump cavities which are bilaterally symmetrical and do not interfere with each other. Adjacent structures of the Tesla runner outer layer plates and the Tesla runner inner layer plates on the same side form a plurality of pairs of Tesla runners; and the Tesla flow channel is outwards communicated with the flow inlet and is inwards communicated with the upper side or the lower side of the pump cavity through the pump cavity flow inlet hole. In conclusion, rapid suction and discharge of fluid can be achieved, and the heat dissipation device can be applied to the field of heat dissipation of precision machinery.