S116013 AE技術を用いた高速・高負荷すべり軸受の焼付き早期予知に関する基礎研究([S11601]トライボロジーにおける実験・計測・解析手法の新展開)

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In order to investigate the durability of the sliding surface of machinery, it is important to know the force acting on such parts and to evaluate stress distribution. Contact stress occurring on meshing gear flanks is an important factor in determining bending stress on the gear teeth as well as load capacity. However, since the contact area of each gear tooth surface is extremely small, a conventional pressure sensor cannot be attached. For this reason, the authors developed a thin-film pressure sensor with multi pressure sensing points connected by shared-type lead films was developed for narrow areas such as gear teeth surfaces, and can measure pressure distribution on the gear flank line when gears mesh together. In the results, the measured pressure was higher than the Hertzian pressure of line contact, and distributed unevenly in the axial direction. On the other hand, when the measured pressure was compared with Hertzian pressure of point contact, the calculated pressure was higher than the measured value. These disagreements seem to be caused by inexact gear geometry, nonparallel or uneven meshing and form of gear flank. In this study, details of the shape of the multipoint thin-film sensor, as well as the measurement results of pressure distribution are described. Key Words : Gear, Pressure Distribution, Tribology, Sensor, Lubrication From the viewpoint of monitoring and maintenance of machinery, it is extremely important to recognize and quantify friction and wear phenomena, such as the progression of wear and the state of friction between sliding surfaces. Acoustic emission (AE) that is the elastic stress wave caused by the deformation and fracture of materials is generated during the friction and wear processes since friction and wear phenomena involve deformation and fracture. By measuring the AE signals, it is possible to perform the in-process monitoring of tribological processes between sliding materials. In this study, in order to establish the condition-based maintenance such as the early detection of seizing using the AE technique, the relationship between changes in wear state and changes in AE signals was investigated on a high load and high speed slide bearing under grease lubrication. As a result, it was found that the high frequency component of the AE signals is very effective to the recognition of the progression of adhesive wear.
2011-09-11

S116013 AE技術を用いた高速・高負荷すべり軸受の焼付き早期予知に関する基礎研究([S11601]トライボロジーにおける実験・計測・解析手法の新展開)

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