Hollow Piezoelectric Actuator with Single-mode Cooperative Work and Its Working Method
A synergistic, air-electric technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem that the remedial method of punching or slotting cannot be implemented, Affecting the manufacturing efficiency of finished products, not leaving enough remedial margins, etc., to reduce the design workload, avoid risks, and expand the scope of application
Active Publication Date: 2021-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
Due to the difference in the degree of modal frequency separation of different prototypes, the size of the slot or the depth of the hole will also depend on the specific situation, which will seriously affect the manufacturing efficiency of the finished product in mass production
At the same time, in order to meet the strict design indicators, many hollow ultrasonic motors do not leave enough "remedial" margin in the structure, and the remedial methods of drilling or slotting cannot be implemented
Method used
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[0052] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0053] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
[0054] Such as figure 1 As shown, the present invention discloses a single-mode cooperative hollow piezoelectric actuator, which includes an annular base, a first rotating shaft, a second rotating shaft, an actuating head, a first bearing, a second bearing, a first bracket, The second bracket, the arc-shaped beam, the arc-shaped beam piezoelectric ceramic sheet, and two substrate piezoelectric ceramic sheets;
[0055] The first rotating shaft and the second rotating shaft are respect...
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The invention discloses a single-mode cooperating hollow piezoelectric actuator and a working method thereof. The hollow piezoelectric actuator includes a first piezoelectric transducer, a second piezoelectric transducer and two brackets. The first piezoelectric transducer includes a ring-shaped substrate and several substrate piezoelectric ceramic sheets, and an actuating head and two rotating shafts are arranged on the outer wall of the ring-shaped substrate; the second piezoelectric transducer includes an arc-shaped beam and an arc-shaped beam piezoelectric ceramic piece. When working, the first piezoelectric transducer can rotate around the first rotating shaft under the push of the friction force, and has one rotational degree of freedom. The present invention does not need to make the working vibration modes of the first piezoelectric transducer and the second piezoelectric transducer consistent, reducing the design workload, and the hollow structure can be used as a channel for light, wires and pipelines, and can be used in space optical instruments It has broad application prospects in optical path adjustment and other aspects.
Description
technical field [0001] The invention relates to the fields of piezoelectric actuation and ultrasonic motors, in particular to a single-mode cooperating hollow piezoelectric actuator and a working method thereof. Background technique [0002] The existing hollow ultrasonic motor is mainly driven by the combination of two out-of-plane isomorphic orthogonal bending vibration modes of the annular stator. The proximity of the vibration frequencies of the two working modes affects the output performance and working efficiency of the hollow ultrasonic motor. The presence of machining errors, work wear, and non-perfectly consistent boundary conditions inevitably lead to the separation of the two modal frequencies. [0003] Generally, on the basis of fully grasping the dynamic characteristics of the structure, the remedial method of punching or slotting is used to make a secondary correction to the working vibration modal frequency of the prototype. Due to the difference in the degr...
Claims
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IPC IPC(8): H02N2/12H02N2/14H02N2/00
CPCH02N2/001H02N2/005H02N2/12H02N2/14
Inventor 于鹏鹏金家楣王亮吴大伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS