Simulation and experimental investigation on low wear rate surface contour of piston/cylinder pair in an axial piston pump. (October 2021)

• Record Type: Journal Article
• Authors: Zhang, Junhui; Lyu, Fei; Xu, Bing; Huang, Weidi; Wu, Wei; Guo, Zhimin; Xu, Haogong; Huang, Xiaochen
• Is Part Of: Tribology international. Volume 162(2021)
• Publication Date: 2021-10
• Subjects: Piston/cylinder pair -- Low wear rate -- Wear contour -- Axial piston pump; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2021.107127
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The surface modification technology affects the friction and wear resistance of the piston/cylinder pair in axial piston pumps. However, in the early operating stages, the bearing surface cannot provide optimal load-bearing and lubrication conditions, resulting in a high wear rate and rapid loss of the surface modification layer. In this paper, the variation in wear of the piston/cylinder pair with the operating time is obtained by a wear degradation model. The wear contour at the lowest wear rate is derived to guide the design of a pre-machined surface contour. The experimental results show that the pre-machined contour reduces the wear rate during the initial operating stage, with the surface modification layer covering the pre-machined surface playing a greater role. Highlights: A wear degradation model is proposed to clarify the variation in cylinder bore wear contour. A cylinder bore contour is designed based on the wear contour with the lowest wear rate in the wear degradation process. The effect of the optimized surface contour on reducing wear in the running-in wear stage is verified by experiments.