变速箱的设计

Design of gearbox

航空发动机风扇变速箱设计：航空变速箱通常用作附件。在涡轮喷气发动机中，如螺旋桨式风扇、敞开式转子和涡轮风扇，变速箱是直列的，并且与附件变速箱不同。本文的目的是设计一种用于航空涡轮喷气发动机的变速箱。在研究了齿轮发动机之后，选定的将是涡扇发动机。比较有助于选择设计参数，例如齿轮、轴承或联轴器的类型。

Aircraft engine fan gearbox design: Aircraft gearboxes are commonly used as accessories. In turbojet engines, such as propeller fans, open rotors, and turbofans, the gearbox is inline and different from the accessory gearbox. The purpose of this article is to design a gearbox for aviation turbojet engines. After studying gear engines, the selected engine will be a turbofan engine. Comparison is helpful in selecting design parameters, such as the type of gear, bearing, or coupling.

一旦选择了发动机，就根据该发动机的功率和转速进行齿轮的设计。该设计使用英国标准 ISO 6336 [正齿轮和斜齿轮的负载能力的计算] 以及用于机械工程应用的 KISSsoft 设计软件进行。齿轮设计与轴承设计平行。轴承设计基于摩擦学计算和 KISSsoft 软件。基于现有的航空发动机变速箱，已经进行了多种设计。选择了设计之后，便会计算出花键安装系统，并根据疲劳计算来设计轴。该设计基于联轴器的选择以及用于风扇轴和低压（LP）压缩机 / 涡轮轴的轴承的 SKF4 计算得出结论。最后介绍了润滑系统。

Once the engine is selected, the gear design is based on its power and speed. This design was carried out using the British standard ISO 6336 [Calculation of Load Capacity for spur and helical gears] and KISSSsoft design software for mechanical engineering applications. Gear design is parallel to bearing design. The bearing design is based on frictional calculations and KISSSsoft software. Based on the existing aircraft engine gearbox, various designs have been carried out. After selecting the design, the spline installation system will be calculated and the shaft will be designed based on fatigue calculations. The design is based on the selection of couplings and SKF4 calculations for bearings used in fan shafts and low-pressure (LP) compressor/turbine shafts. Finally, the lubrication system was introduced.

变速箱的故障诊断

Fault diagnosis of gearbox

基于自适应降噪器的高斯参考信号技术：变速箱齿轮故障信号的振动信号是信息性组件，可用于变速箱故障诊断和早期故障检测。但是，振动信号通常是非线性且不稳定的，并且它们包含由数据采集系统和其他机械元件的干扰引起的背景噪声。

Gaussian reference signal technology based on adaptive noise reducer: The vibration signal of gearbox gear fault signal is an informative component that can be used for gearbox fault diagnosis and early fault detection. However, vibration signals are usually nonlinear and unstable, and they contain background noise caused by interference from data acquisition systems and other mechanical components.

本文提出了一种基于自适应降噪器的高斯参考信号（ANR-GRS）技术的新型变速箱故障诊断方法，该方法可从一对一的多类支持向量机（OAOMCSVM）显着降低噪声并改善分类。变速箱的故障类型。ANR-GRS 处理轴的转速，以访问和消除沿振动信号频谱在两个连续边带频率之间的窄带中的窄带中的噪声分量，从而可以消除巨大的噪声分量，并且对信息信号的失真最小。然后将来自 ANR-GRS 的最佳输出信号提取到许多信号特征向量中，以生成合格的分类数据集。最后，OAOMCSVM 使用提取的特征数据集对实验变速箱的健康状态进行分类。

This article proposes a novel gearbox fault diagnosis method based on adaptive denoising Gaussian reference signal (ANR-GRS) technology, which can significantly reduce noise and improve classification from one-to-one multi class support vector machine (OAOMCSVM). Types of gearbox faults. ANR-GRS processes the rotational speed of the shaft to access and eliminate noise components in the narrowband between two consecutive sideband frequencies along the vibration signal spectrum, thereby eliminating significant noise components and minimizing distortion of the information signal. Then extract the optimal output signal from ANR-GRS into many signal feature vectors to generate a qualified classification dataset. Finally, OAOMCSVM uses the extracted feature dataset to classify the health status of the experimental gearbox.

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