Investigations of the static and dynamic characteristics of water-lubricated hydrodynamic journal bearing considering turbulent, thermohydrodynamic and misaligned effects

By Huihui Feng, Shuyun Jiang, A. Ji. Tribology International, 2019

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Abstract A misaligned thermohydrodynamic (THD) model considering turbulent-flow is presented to predict the performance of water-lubricated hydrodynamic journal bearing (WHJB). The load capacity, frictional power loss, flow rate, mid-plane pressure distribution, translational, tilting and coupled translational-tilting dynamic coefficients versus the rotary speed, eccentricity ratio and tilting angle are analyzed; quantitative comparisons between models considering and without considering turbulent, THD and misaligned effects are given. Results show that the turbulence improves the load capacity while the THD effect decreases it; the THD effect reduces the frictional power loss significantly while the turbulent effect is weak; at large rotary speed and eccentricity ratio, the THD and turbulent effects on the dynamic coefficients should be fully considered at both of aligned and misaligned conditions.

Subfields: Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/ad8aecd935a8e8e9891582e6d4adc255c41e4b7f