Numerical Simulation Of The Grease Flow Of The Centralized Lubrication System

The centralized lubrication system has been widely used in commercialvehicles, construction machinery and other big equipment because of its efficient,convenient and energy saving. But in the alpine region universal grease has poorliquidity that resulting in pump station capacity dips, oil blocked and lack ofpressure. Therefore, the development of centralized grease, superior pump stationhas become a serious problem. We also have to do the simulation of the grease flowto reveal the mechanism of the transport of the grease. The main work of this paperis as follows:(1) Developed dedicate lithium grease of the centralized system throughmethod of orthogonal design, got the best solution ratio of the raw materials andhave optimized the preparation of lithium grease. This dedicate lithium grease hasexcellent fluidity, abrasion resistance and rust resistance.(2) Designed a new type of intelligent pump station. This pump station use ahigh performance gear pump has pre-cut function, gravity balanced oil level senorand microcomputer control system. Its pump capacity is much higher than thesimilar products, accurate oil level display avoid the “evacuation” phenomenon, andachieved a high degree of automation.(3) Use the L-B rheological model which has two indexes studied therheological properties of the dedicated lithium grease. Obtained the rheologicalbehavior of the dedicate grease in different soap concentration and base oil viscosityversus time.(4) Established control equations of the grease flow, analyzed the change of therate and pressure during grease flow. And finished numerical simulation of thegrease flow in the centralized system, analyzed the effect of the new pump station.These researches has improved the adaptability of centralized lubricationsystem in the alpine region, and provided technical support to the use of thecentralized lubrication system.