考虑平面度的航空发动机齿轮齿面计量误差控制

摘要:

齿轮在航空发动机中处于高速、重载及热梯度场的复杂工况下,基准端面与齿面产生的弹性与热变形而导致的空间位姿偏差单靠坐标补偿难以完全消除,进而引起齿面计量误差。为此提出考虑平面度的航空发动机齿轮齿面计量误差控制方法。采用HF-PG300齿轮齿面平面度微米级检测装置,获取齿面三维坐标并计算平面度偏差。将平面度偏差引入预行程误差模型,构建多维度综合误差模型。通过空间坐标变换与六参数优化模型,实现误差的递进式修正与齿面姿态精准对齐。实验结果表明,在齿轮共振工况下,所提方法可将齿面法向偏差控制在0.02mm以内,齿廓形状偏差最大仅为2.36μm,齿形边缘清晰且规则,几乎无明显畸变,有效抑制多源误差的耦合效应,为航空发动机齿轮的高精度制造与可靠运行提供了有效的计量与控制支撑。

Abstract:

Gears in aircraft engines operate under complex conditions of high speed, heavy load, and thermal gradient fields. The spatial pose deviation caused by elastic and thermal deformation of the reference end face and tooth surface cannot be completely eliminated by coordinate compensation alone, which can lead to tooth surface measurement errors. A method for controlling the measurement error of gear tooth surface in aircraft engines considering flatness is proposed. Using the HF-PG300 gear tooth surface flatness micrometer level detection device, obtain the three-dimensional coordinates of the tooth surface and calculate the flatness deviation. Introduce flatness deviation into the pre travel error model and construct a multidimensional comprehensive error model. Through spatial coordinate transformation and six parameter optimization model, progressive error correction and precise alignment of tooth surface posture are achieved. The experimental results show that under gear resonance conditions, the proposed method can control the normal deviation of the tooth surface within 0.02mm, and the maximum deviation of the tooth profile shape is only 2.36 μ m. The tooth profile edge is clear and regular, with almost no obvious distortion, effectively suppressing the coupling effect of multi-source errors, and providing effective measurement and control support for high-precision manufacturing and reliable operation of aircraft engine gears.