研究工作条件变化对EHA内部的滑特性影响的研究
Yantao Zhang1,2, Zongbin Chen3,4, Jun Che1,2
1Institute of Noise & Vibration, Naval University of Engineering, Wuhan, China.
这项研究开发了一种联合模拟模型,用于分析电液执行器 (EHA) 内中的滑. 研究结果表明,降低速度和增加压力会恶化滑,而优化操作条件可以提高油膜厚度和稳定性.
科学领域:
- 机械工程 机械工程
- 部落学 (tribology) 是一个学科.
- 流体动力学 流体动力学
背景情况:
- 电液驱动器 (EHA) 在苛刻的条件下工作,导致内部摩擦对的复杂滑挑战.
- 在EHA中,可变的速度,压力和方向会产生低于最佳的滑状态,影响部件的寿命.
研究的目的:
- 为了研究不同运行条件下的EHA内部中轮环/外摩擦对的滑状态演变.
- 开发和验证一个用于预测滑性能的联合模拟模型.
主要方法:
- 建立了一个结合模拟模型,集成Simerics-MP+和MATLAB,以分析轮环/外摩擦对.
- 预测了轮圈的微运动轨迹,并根据实验动态测量进行了验证.
- 计算油膜厚度变化时,预测误差低于7.6%.
主要成果:
- 发现,降低速度和增加负载压力会使油膜滑特性恶化.
- 从20,000到40,000rpm/s的方向逆转速度增加,平均油膜厚度增加了23.64%,波动减少了2.57%.
- 逆向下降的压力从10 MPa增加到5 MPa,平均油膜厚度增加了22.39%,波动减少了8.17%.
结论:
- 联合模拟模型准确地预测了EHA内部中的油膜变化.
- 优化操作参数,如方向逆转率和压力,可以显著提高滑性能.
- 这项研究增强了对EHA摩擦对演变的理解,这对于提高可靠性和性能至关重要.
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