Effect of Lubricant Starvation on the Tribo-Dynamic Behavior of Linear Roller Guideway

Parivash Soleimanian,Mahdi Mohammadpour,Hamid Ahmadian,Jiaxi Zhou

doi:10.1155/2021/7517696

Parivash Soleimanian, Mahdi Mohammadpour + Show 2 more

Open Access

https://doi.org/10.1155/2021/7517696

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Abstract

This paper presents an experimentally validated numerical approach linear roller guideways considering coupled vertical and horizontal (feed) motions and taking into account lubricant starvation. The inlet starvation is considered by incorporating potential flow method. Results show that starvation has pronounced effect on the lubricant film thickness, friction, and applied load on contact by up to 32%. Localised pressure values may vary by up to 100%. The severity of starvation effect is frequency dependent. It is also revealed that the starvation effect can be controlled by the amount of preload on linear guideway.

Highlights

Linear guideways are replacing sliding components due to higher demand for ultraprecision machining
First, the presented model is validated at conjunction and system levels against experiment and other works in the open literature. en, the significance of starvation effect on the tribo-dynamics of linear guideway is
After conducting an implicit tribo-dynamic calculation for starved and fully flooded conditions, the predicted forces obtained from the previous implicit method are utilised as input for the numerical explicit EHL model under starved and fully flooded conditions

Summary

Introduction

Linear guideways are replacing sliding components due to higher demand for ultraprecision machining. Important features of linear guides are reduced friction, stiffer contacts, and improved precision. Erefore, linear guides are the key components of these machines and determine the dynamics of the system and its accuracy [1, 2]. Ese guideways experience horizontal and vertical motions simultaneously. Ese motions are excited by machining loads as well as the contact entertainment conditions [3], leading to instability [4,5,6,7], noise [8, 9], fatigue [10,11,12], and wear [13, 14]. Friction in the linear guideway acts as a source of damping, affecting the precision of machine. Considering coupled vertical and feed motions and the effect of system’s tribology, any model requires to consider the multiphysics effects of dynamics and tribological

Methods

Results

Conclusion