Wear Behavior of a Bio-inspired Bearing for off-center Loads
- PDF / 3,528,644 Bytes
- 12 Pages / 595.22 x 842 pts (A4) Page_size
- 18 Downloads / 157 Views
Journal of Bionic Engineering http://www.springer.com/journal/42235
Wear Behavior of a Bio-inspired Bearing for off-center Loads Delphine Sysaykeo1,2*, Jean-Marc Linares1, Emmanuel Mermoz1,2 1. Aix-Marseille Université, CNRS, Centre National de la Recherche Scientifique, ISM, Institut des Sciences du Mouvement, Marseille 13009, France 2. Advanced concepts and Dynamic systems architecture department, Airbus Helicopters, Aeroport International Marseille Provence, Marignane 13700, France
Abstract Misalignment is one of the most common causes of wear in bush bearings. Design improvements have been proposed by many researchers. Unfortunately, it did not efficiently reduce the misalignment. Classic geometrical designs sometimes reach their limits. For this reason, a bio-inspired design is proposed to solve the impediment. In this article, a bio-inspired bearing suited to misalignment was tested and compared to a classical bush bearing. The contact pressures of both bearings were compared with static Finite Element (FE) simulations for off-center load. Due to the complex shape of the involved contact, the performances of both bearings were also studied over time. Their wear behaviors were predicted with a numerical method. The methodologies emplaced to simulate the wear were described in this paper. Particularly, the wear coefficient determination obtained by experimental testing was detailed. The pressure value, the contact zone and the wear depth were compared and discussed. The wear results for the classical bearing are in accordance with the literature. The simulations show a deeper wear on the classical bush bearing than on the bio-inspired bearing. This leads to a longer period of service life for the bio-inspired bearing. Keywords: biologically inspired design, bush bearing, wear, simulation Copyright © Jilin University 2020.
1 Introduction The service life of a mechanism is strongly related to the wear that occurs on its links. Bush bearings have a widespread use in mechanisms. One of the most common causes of wear in the bearing is misalignment between the shaft and the outer ring. The wear effect of misalignment occurs when[1]: asymmetric load is applied; the shaft or the outer ring are distorted; defaults of clearance appears after manufacturing. It has been noticed that misalignment induces a greater maximum pressure compared to aligned cases. The pressure peak moves towards the bearing edges. An extensive review dealing with misalignment was made by Jang et al.[1]. The clearance is strongly related to the misalignment and has a huge impact on bush bearing performances[2]. This clearance can be reduced in order to enhance the performance of the link. However, the manufacturing cost would increase significantly[3]. The design of the bush bearing is a trade-off between tolerance specifications and manufacturing costs. *Corresponding author: Delphine Sysaykeo E-mail: [email protected]
Researches have been realized in order to reduce the negative impact of misalignment on the wear. For example, C
Data Loading...
