A spring-shaped piezoelectric ceramic actuator and a method for obtaining a large stroke
A technology of piezoelectric ceramics and actuators, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., and can solve problems such as small range of motion and small allowable strain. Achieve the effect of increasing application value
Active Publication Date: 2016-07-06
BEIHANG UNIV
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Problems solved by technology
However, due to its small allowable strain, although its output force can be large, its range of motion is small
The current piezoelectric ceramic actuator has a maximum output force of up to 50 tons, but it can only achieve millimeter-level movement
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[0020] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.
[0021] The invention discloses a spring-shaped piezoelectric ceramic actuator and a method for obtaining a large stroke. The shape of the spring-shaped piezoelectric ceramic actuator is the same as that of an ordinary spring, and the spring wire is a hollow tube formed of piezoelectric ceramics and electrodes. ; A spiral electrode is arranged around the wall of the hollow tube in the hollow tube, the electrode can generate strain in the hollow tube, and the strain can cause axial deformation of the spring. The simulation results prove that the axial expansion rate of the spring can be 80 times the maximum strain on the spring wire, so the spring-shaped piezoelectric ceramic actuator can obtain a larger motion stroke. The principle of the spring-shaped piezoelectric ceramic actuator is as follows:
[0022] (1) The spring-shaped piezoelectric cera...
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The invention provides a spring-shaped piezoelectric ceramic actuator and a method for obtaining a large stroke. The shape of the spring-shaped piezoelectric ceramic actuator is the same as that of ordinary springs, but it is made of piezoelectric ceramics. The spring wire is a hollow tube formed by piezoelectric ceramics and electrodes, and spiral electrodes are arranged on the wall of the hollow tube. , when a voltage is applied, the electrode creates a strain in the hollow tube, and the strain deforms the spring axially. The simulation results prove that the axial expansion rate of the spring can be 80 times of the maximum strain on the spring wire. The present invention proposes a spring-shaped piezoelectric ceramic actuator, and realizes the use of the spring-shaped piezoelectric ceramic actuator to obtain a larger movement stroke, thereby greatly improving the movement of the piezoelectric ceramic actuator The stroke greatly improves the application value of the piezoelectric ceramic actuator as a key component of active control.
Description
technical field [0001] The present invention relates to a large-displacement actuator of piezoelectric ceramics, more precisely, a piezoelectric ceramic actuator in the shape of a spring. The piezoelectric effect of the electroceramic causes stress inside the spring, which is amplified by the spring structure into the deformation of the spring, thus greatly improving the motion stroke of the piezoelectric ceramic actuator, which is a key component of active control. Background technique [0002] Actuators control the speed, displacement and force of the load by applying controllable forces such as pushing and pulling to the load, and are widely used in engineering fields such as aviation, aerospace and vehicles. Piezoelectric ceramic materials play an important role in the field of actuators due to their unique electric field-deformation effect. However, due to its small allowable strain, although its output force can be large, its range of motion is small. The current pie...
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IPC IPC(8): H02N2/02
Inventor 刘丰睿赵丽滨山美娟
Owner BEIHANG UNIV