Design method of non-circular C-shaped damping ring with controllable contact pressure

Abstract

The invention provides a design method of a non-circular C-shaped damping ring with controllable contact pressure. Based on the design method, corresponding non-circular C-shaped damping ring free profiles can be designed according to different contact pressure requirements, so that the contact pressure depends on the gear rotating speed and also depends on profile deformation, and the problem that the contact pressure is uncontrollable under the designed rotating speed is solved; and the optimal contact pressure corresponding to the maximum vibration reduction efficiency of the damping ring can be obtained under the designed rotating speed. Based on the design method, the contact pressure between the damping ring and the gear is uniformly distributed, and the contact rate is high. When the vibration damper is installed in a gear, even contact pressure can be generated, the contact rate is high, and the situation that the vibration damping performance is reduced due to a non-contact area can be avoided.

Description

technical field [0001] The present invention relates to a design method of a damping member. Background technique [0002] When the aviation high-speed thin-spoke gear accumulates excessive vibration energy due to traveling wave resonance, sudden traveling wave resonance damage is very likely to occur. The property is pitch-diameter fatigue fracture. The broken tooth block directly threatens the safety of the entire transmission system and even the engine. This form of failure and damage has caused many major flight failures. Therefore, the risk of traveling wave resonance damage of aviation high-speed thin-spoke gears is extremely high, and effective measures should be taken to reduce the vibration energy during traveling wave resonance to avoid the risk of failure. technical means. [0003] The C-shaped damping ring can be used to reduce the vibration energy during traveling wave resonance and weaken the influence of resonance on the gear transmission system. However, ...

AI Technical Summary

Problems solved by technology

However, the working contact pressure of this kind of damping ring is highly dependent on the centrifugal field formed by the high speed, and the contact pressure is uncontrollable, which increases the difficulty of designing the optimal contact pressure required to achieve the maximum frictional energy consumption

[0005] (2) Since the diameter of the ring groove is slightly smaller than the maximum size of the damping ring, the damping ring can be installed into the ring groove to form a preload. Therefore, although the perfect circular C-shaped damping ring is round in the natural state, the material after being installed into the ring groove Deformation, the damping ring can only be in partial contact with the gear, that is, a non-contact area is formed, which not only leads to uneven distribution of contact pressure, but also loses the effective area where the damping ring participates in frictional energy consumption, thereby reducing the damping ring's vibration reduction capability

Although, as the speed increases, the non-contact area is gradually shrinking, but this shrinking rate is slowing down, and even if the speed increases to a higher level, the non-contact area has not completely disappeared

[0006] (3) The existing C-shaped damping ring is designed according to empirical formulas and data, but this kind of damping ring has disadvantages such as uncontrollable contact pressure and obvious non-contact area, and there is still no effective improvement design method at present

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