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1 2018

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Simulation for instable floating of hydrodynamic guides during acceleration and at constant velocity

Zhang Y., Wittstock V., Putz M.

Journal of Machine Engineering

2018

Vol. 18, No. 3

5--15

High speeds and the resulting hydrodynamic pressure lead to significant floating of the linear guides. During this movement, the floating behaviour shows phenomena that can be explained by the Reynolds equation. This paper presents a dynamic model of the floating behaviour, which adds tribological approaches to the common Reynolds equation since the floating behaviour does not only depend on the speed, but also on numerous other conditions. This developed simulation method is based on the use of finite difference elements and was implemented using Simulink and Matlab, allowing flexible implementation of further influences such as lubrication cycles and geometry of the sliding surface. After adapting the simulation model and determining the parameters, the calculated floating behaviour corresponds well with the experimental results.