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What is the reason for the deep vibration of the harmonic reducer?

update:2021-11-01
abstract:First of all, we must start from the principle and understand the working principle of the reducer. ...
First of all, we must start from the principle and understand the working principle of the reducer. Take the harmonic reducer as an example. According to the principle of gear meshing, when meshing interference or tooth surface finish is poor, the meshing impact force will increase, resulting in a gear reducer.  From the perspective of the vibration mechanism of the thin-walled cylinder, the reason for the deep vibration of the harmonic reducer is    1. Through theoretical research, the shock absorber is directly proportional to the density of the material, and inversely proportional to the Young's modulus and Poisson's ratio of the material.    2. The effect of structural design on the vibration of the reducer, the vibration is inversely proportional to the gear tooth length, inversely proportional to the elastic wheel wall thickness, and proportional to the elastic wheel radius. 3. Some key components of the reducer, such as the influence of the shape, position and tolerance of the camshaft on the finish of the tooth surface, if the shape, position and tolerance of the axial symmetry are large, the eccentric force of the harmonic reducer will cause the reducer The eccentric force becomes the exciting force, which intensifies the vibration.   4. Unreasonable selection of parts will not only lead to unbalanced forces, but also generate new harmonic frequencies, which will increase the vibration of the system and increase the possibility of system resonance.    Vibration Damper Solution    On the basis of the above research, the vibration theory, tooth profile curve and convex curve have been developed from the aspects of structure and tooth profile design, optimal meshing, and optimization of elastic gear tooth length and wall thickness. Yes    In addition, the machining accuracy of the gear stage is improved, the tooth surface finish is improved, and the friction smoothness of the lifting transmission is reduced. In terms of material selection, Haozhi Electromechanical selected a new type of alloy steel with low density and large elastic modulus. By optimizing the manufacturing process, the grain of the material was refined, and the elastic modulus of the material and the Poisson's ratio of the material were further improved. These measures Excessive vibration of the gear reducer can be avoided. The following table shows the metal phase and grains of the material after the improved process.   In terms of parts processing, by improving clamping tools and technological processes, reducing the number of clamping parts in processing, changing the processing standards, and improving the accuracy and grade of parts processing. Take the camshaft as an example, the cam profile symmetry μ≤2μm?   In terms of assembly rules, artificial intelligence algorithms are introduced into the assembly of harmonic reducers. The flow chart of smart selection is as follows:   Improved shock absorber    Through spectrum analysis and comparison, it can be seen that the vibration amplitude of the improved gear is significantly reduced, and the meshing frequency and tooth side frequency are significantly reduced, indicating that the improved electromechanical gear reducer has a good meshing state and a good operating effect.

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