Research on the Injection Performance of a Novel Lubricating Device Based on Piezoelectric Micro-Jet Technology
Research on the Injection Performance of a Novel Lubricating Device Based on Piezoelectric Micro-Jet Technology
复制标题
基于压电微射流技术的新型润滑装置喷射性能研究
DOI：
10.1007/s11664-016-4603-5
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发表时间：
2016-08-01
影响因子：
2.1
通讯作者：
Zhang, Lu
中科院分区：
文献类型：
--
作者：
Li, Kai;Liu, Jun-Kao;Zhang, Lu
为了解决轴承系统润滑失效的问题，提出了一种基于压电微射流技术的新型按需滴油润滑装置。分析了新型压电微射流润滑装置的喷射性能。通过试验与仿真结果的对比，研究了流固耦合对系统工作频率的影响。实验结果表明，所提出的预测微喷工作频率的方法是可行的。在润滑油不能被挤压的假设下，推导了喷嘴处的速度入口边界模型。结合该模型，根据模拟结果讨论了润滑油密度、动态粘度和表面张力对喷射性能的影响。对不同稀释比的润滑油微射流的喷射性能进行了实验研究。通过对计算结果的分析，给出了不同性质润滑油喷射时的推荐激励。
In order to solve the problem of lubrication failure in bearing systems, a novel lubricating device which can achieve drop-on-demand lubrication is proposed based on piezoelectric micro-jet technology. The injection performance of the novel piezoelectric micro-jet lubricating device are analyzed in this paper. The influences of the fluid-structure interaction to the working frequency are studied by comparing the results of tests with simulations. A method used to forecast the working frequency of the micro-jet is proved to be available. A velocity inlet boundary model at the nozzle is derived under the assumption that the lubricating oil cannot be pressed. Combined with this model, the influences of density, dynamic viscosity and surface tension of the lubricating oil on the injection performance are discussed according to the simulation results. An experiment on the injection performance of the micro-jet for ejecting lubricating oil with different dilution ratios is performed. The recommended excitations are given for ejecting lubricating oil with different properties by analyzing the results.