修形人字齿轮振动测试试验台可行性验证

为验证封闭功率流式修形人字齿轮振动测试试验台的可行性,首先,搭建封闭功率流式人字齿轮系统振动测量试验台,依据试验台建立了包含陪试齿轮、试验齿轮以及加载扭力轴的24自由度啮合型弯-扭-轴耦合振动模型;然后,选用设计的某人字齿轮齿面三维修形的试验齿轮作为计算实例,分析了不同扭力轴刚度下,陪试齿轮对试验齿轮啮合线向相对振动加速度的影响。结果表明,在给定工况下,陪试标准齿面人字齿轮对修形人字齿轮的齿面相对振动影响为1.35%,远低于修形齿面18.2%的减振率,因此用该试验台进行人字齿轮传动系统齿面三维修形减振测试切实可行。陪试齿轮对试验齿轮振动的影响程度随着扭力轴刚度增加而增加,故试验中在满足系统强度、传动平稳及布置要求的前提下,应将扭力轴扭转刚度设计的尽量低,应最大幅度地降低扭力轴扭转刚度设计值,以减小陪试齿轮对试验齿轮振动测量的影响。

Feasibility Verification on Vibration Testing Bench of Herringbone Gear with Tooth Surface Modification

In order to verify the feasibility of a closed power flow vibration test bench about modification herringbone gear, a corresponding test bench was set up. A Herringbone gear vibration model with 24 degrees of freedom was established while considering the accompanying test gears, experimental gears and torsion shafts. The relative vibration acceleration influenced by torsion shaft stiffness was discussed, using herringbone gear with three-dimensional teeth modification as an example. The results consistently indicated that the relative vibration acceleration value of the teeth modification herringbone gear was influenced by torsion shaft and was 1.35% less than that of the given operating condition, so the closed power flow vibration test bench was applicable to the vibration experiment of the teeth herringbone gear transmission system. The influence between the paternity testing gear and experimental gear increased as the stiffness of the torsion shaft was enhanced. Thus, the stiffness of the torsion shaft should be as small as possible under the premise of system strength, transmission stability and layout requirement.