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Dynamic response and dynamic accuracy reliability of planar mechanism with multiple lubricated clearances

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Abstract

In common mechanical systems, lubricant is usually added to joint clearance of kinematic pair, so as to improve the motion accuracy of the mechanism. However, most of research on mechanisms with lubricated clearance focus on simple mechanisms with single clearance, whereas less research has been done on complex mechanisms with multiple lubricated clearances. At the same time the research on the reliability of mechanisms with clearances often focusses on kinematic accuracy reliability with dry friction clearances, whereas less research has been done on dynamic accuracy reliability with lubricated clearances. Therefore, in this paper, we take the 2-DOFs 9-bar mechanism as a research object and analyze the dynamic response and dynamic accuracy reliability of slider considering multiple lubricated clearances. We establish the dynamic model of the mechanism with lubricated clearances based on the Lagrange multiplier method and the dynamic accuracy reliability model of the mechanism according to the first-order second-moment method. Then we analyze and compare the impact of dry friction clearances and lubricated clearances on dynamic response and dynamic accuracy reliability of the mechanism under different driving speeds and clearance values. This research provides a basis for the dynamic prediction and reliability design of the mechanism.

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Acknowledgement

This research is supported by National Natural Science Foundation of China (grant no. 52275115) and Shandong Provincial Natural Science Foundation (grant no. ZR2022ME040).

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  1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Xiulong Chen & Shun Gao

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  1. Xiulong Chen
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Correspondence to Xiulong Chen.

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This manuscript has not been published, simultaneously submitted, or already accepted for publication elsewhere. All authors have read and approved the manuscript. There is no conflict of interest related to individual authors’ commitments and any project support. All acknowledged persons have read and given permission to be named. Xiulong Chen has nothing to disclose.

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Chen, X., Gao, S. Dynamic response and dynamic accuracy reliability of planar mechanism with multiple lubricated clearances. Multibody Syst Dyn 57, 1–23 (2023). https://doi.org/10.1007/s11044-022-09853-w

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