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Transfer of the Method for the psychoacoustic Design of Ground Bevel Gears extended by the Application of a Targeted Micro Geometry Scatter

通过应用目标微观几何散射扩展磨齿锥齿轮心理声学设计方法的迁移

基本信息

批准号：
384949278
负责人：
Professor Dr.-Ing. Christian Brecher
金额：
--
依托单位：
Klingelnberg GmbH
依托单位国家：
德国
项目类别：
Research Grants (Transfer Project)
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/384949278?language=en
关键词：
Transfer Method psychoacoustic Design Ground

项目摘要

The requirement on gears and transmissions are determined by external conditions as the legislation as well as the competitive situation on the world market. The continuous demand for higher power densities for the increase of the efficiency can be achieved by a reduction of the involved masses and by an increased load-carrying capacity via new materials. Furthermore, a major requirement by the transmission is a low noise level. Especially bevel gears, with comparatively low contact ratios because of the high values for the modifications, are often described as noise critical.Lapped bevel gear set are perceived as being quieter or smoother compared to ground bevel gear sets. Current investigations lead to the fact that the manufacturing related microgeometry scatter and pitch deviation can be identified as the root cause. Ground bevel gears in contrast have a high reproducibility of the manufactured geometry with low pitch deviations. The high reproducibility of the geometry may lead to a tonal noise spectrum. The implementation of targeted pitch deviations is used for fan applications to reduce the amplitudes of higher harmonics of the rotor blade frequency. In gear applications, the pitch deviation for reduction of tonality is avoided, as it may lead to premature tooth meshing which lead to a decrease of the load-carrying capacity. The aim of this research project is the transfer of the method for psychoacoustic design of bevel gears on an automotive application. Therefore, the existing methods of the dynamic simulation of the tooth mesh and the psychoacoustic design of gears provide the basis for the project and will be extended for the simulation of a complete tooth hunt in order to implement an increase of the background noise level by a targeted topography scatter. The topography scatter is used to reduce the tonality of the noise spectrum. Using the FE-based tooth contact analysis, a simulation of a gear set with individual micro geometries for each tooth is realized. In order to assure the productivity of the process The manufacturing process of the topography scatter needs to be realized without an extra dressing operation. Furthermore, it is necessary to define the microgeometry scatter which avoids disadvantages for the load-carrying capacity. The transferred methods and the gained knowledge will be applied on an automotive transmission and will be validated by test rig trials and vehicle measurements. The result of the planned research project is a novel method for optimizations of the acoustic behavior of bevel gears based on a targeted topography scatter.

对齿轮和传动装置的要求是由立法等外部条件以及国际市场竞争形势决定的。为了提高效率，对更高功率密度的持续需求可以通过减少所涉及的质量和通过新材料增加的承载能力来实现。此外，变速器的一个主要要求是低噪声水平。特别是锥齿轮，与相对较低的接触比，因为高值的修改，往往被描述为噪声临界。与地面锥齿轮组相比，叠齿锥齿轮组被认为是更安静或更平滑的。目前的调查表明，与制造相关的微观几何散射和节距偏差可以确定为根本原因。相比之下，地面锥齿轮具有高再现性制造几何与低间距偏差。几何图形的高再现性可能导致音调噪声谱。目标间距偏差的实现用于风扇应用，以减少转子叶片频率的高谐波幅值。在齿轮的应用中，为减少音调的节距偏差是避免的，因为它可能导致过早的齿啮合，从而导致承载能力的下降。本研究项目的目的是将锥齿轮的心理声学设计方法应用于汽车应用。因此，现有的齿网动态模拟方法和齿轮的心理声学设计方法为该项目提供了基础，并将扩展到完整的寻齿模拟，以实现通过目标地形散射来提高背景噪声水平。利用地形散射来降低噪声谱的调性。利用基于有限元的齿面接触分析，实现了具有不同微几何形状的齿轮组的仿真。为了保证工艺的生产率，需要在不进行额外修整的情况下实现地形分散的制造过程。此外，有必要确定微几何散射，以避免对承载能力的不利影响。所转移的方法和获得的知识将应用于汽车变速器，并将通过试验台试验和车辆测量进行验证。计划研究项目的结果是一种基于目标地形散射的锥齿轮声学性能优化的新方法。