Bragg type piezoelectric photonic crystal vibration damping gear
A Bragg-type piezoelectric and phononic crystal technology, applied in belts/chains/gears, rotation vibration suppression, components with teeth, etc., can solve the problems of noise reduction, incomplete elimination, vibration weakening, etc., and achieve low requirements , Improving the working environment of workers and improving the effect of vibration and noise characteristics
Inactive Publication Date: 2013-08-28
HARBIN ENG UNIV
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But it must be pointed out that we can only weaken the vibration and reduce the noise through various means, so that the impact caused by it is within the scope of our requirements, but it cannot be completely eliminated.
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[0014] The present invention will be described in more detail below in conjunction with the accompanying drawings:
[0015] combine figure 1 ~4, the present invention is mainly aimed at gear vibration reduction in the low and medium frequency range. Here, the vibration reduction effect of the gear in the low and medium frequency domain is realized by using the controllable characteristic of the vibration bandgap that can be achieved by combining the Bragg-type phononic crystal with the piezoelectric material. The principle is to replace the gear spokes with rod-shaped Bragg-type phononic crystals, and change the circumferential shear wave received by the gear into bending waves received by the Bragg-type phononic crystal rod. When excited by elastic waves within its bandgap frequency, the bending reflected waves between adjacent cells of the phononic crystal can be reflected and canceled. More importantly, the input excitation of the gear is detected by the sensor, and a cert...
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The invention aims at providing a Bragg type piezoelectric photonic crystal vibration damping gear. The Bragg type piezoelectric photonic crystal vibration damping gear comprises a gear ring and hubs, rod-shaped Bragg type photonic crystals are arranged at the positions of spokes and connected with the gear ring and the hubs in an interference, welded or screw mode, every rod-shaped Bragg type photonic crystal comprises piezoelectric units and non-piezoelectric metal units which are alternately arranged, connected and hollow inside, the piezoelectric unit and the non-piezoelectric metal unit which are adjacent are connected through flanges respectively at ends of the piezoelectric unit and the non-piezoelectric metal unit which are adjacent, a sensor which is used for detecting gear ring input excitation is arranged inside a piezoelectric unit or a non-piezoelectric metal unit, and the portions of the hubs, which are connected with the rod-shaped Bragg type photonic crystals, are provided with connector holes and wire grooves. The Bragg type piezoelectric photonic crystal vibration damping gear is simple in whole structure, convenient to manufacture and reliable in usage, has a low requirement of a work environment and can be used for improving vibration noise characteristics of medium-low speed gearboxes and the working environment of workers and the like.
Description
technical field [0001] The present invention relates to a gear, specifically a vibration damping gear. Background technique [0002] As the basic parts in the machinery industry, gears play the role of transmitting motion and power, and their applications are also very extensive. The vibration problem in the gear transmission process will not only reduce the transmission accuracy and service life of the gear, but even affect the working accuracy and service life of the machinery, but also cause noise pollution and affect people's health. Therefore, the vibration reduction and noise reduction of gears is of great significance to improve the use accuracy of machinery, prolong the service life of machinery, and improve people's working environment. At present, there are two main methods for reducing gear noise. One is to minimize the generation of vibration and noise. This can be achieved by optimizing the structure, improving accuracy, or reducing installation errors. Take m...
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IPC IPC(8): F16H55/17F16F15/18
Inventor 舒海生林航刘伟李世丹董立强高恩武张法刘少刚赵丹
Owner HARBIN ENG UNIV