The double-circular arc gear noise reduction fork hole method of the double-circle point method is the cross-drilling of the double-arc gear on the both end faces of the double-arc gear, so as to reduce the variation of the meshing rigidity of the double-arc gear. . Tests show that the fork hole method can have the maximum noise reduction of 21-3IB, and has a large damping effect in the gear resonance region. It can be seen that the double arc gear of the hole is an ideal method to reduce the noise of the double arc gear. The process is feasible, and the lubricating oil can be properly selected to fully exert the vibration damping and noise reduction effects of the double arc gear of the fork hole. The disadvantage is that the fork hole reduces the rigidity and strength of the gear, and the vibration damping and noise reduction effects are limited by the type of the lubricating oil used, so it is difficult to promote. Reshaping, noise reduction, shape reduction and noise reduction are widely used noise reduction measures for involute gears. For involute gears, including tooth height modification and tooth width modification; for double arc gears, the tooth height modification is no. Meaning, so only the tooth width is modified. The principle of shape-reducing noise reduction is to ensure that the total meshing stiffness of the gear does not change when the teeth are bitten and bitten. This requires correct calculation of the amount of modification according to the load conditions, otherwise it is difficult to achieve the purpose of noise reduction.
For the same amount of modification, the noise reduction effect is different under different speeds and loads. When the actual working load of the gear is equal to or close to the load used to calculate the trimming amount, the noise reduction effect is best, and the maximum noise reduction amount can be sdB*. The research direction of the double arc gear reducer for vibration reduction and noise reduction is as follows: l) Shenren studies the calculation method of the double-arc gear, especially the single-tooth meshing stiffness of the 91-type double-arc gear, and establishes the calculation formula of the single-tooth meshing stiffness; (2) According to the meshing characteristics of the double-arc gear, The method of calculating the total meshing stiffness of the gear by the single tooth meshing stiffness; (3) Considering the gear shaft, bearing and box as a system, studying the vibration characteristics of the double arc gear reducer, and finding out the main influences on vibration and noise. Factors; (4) analysis of the box to find its vibration performance, dynamic redesign; (5) for various damping damping, noise reduction measures and other noise reduction methods (such as shaping, forks, etc.) Preferably, find better damping and noise reduction measures; (6) study the mechanism of damping material and double arc gear's proprietary noise reduction technology, such as shape modification and fork hole, and find out its vibration reduction and noise reduction. principle.
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