Zhang Tiangui, Yan Guishan, Liu Xianhang, Ding Beichen, Feng Guodong, Ai Chao
School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, China.
School of Intelligent Systems Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
Sci Rep. 2024 May 28;14(1):12172. doi: 10.1038/s41598-024-62727-3.
The lubrication performance of a straight-line conjugate internal meshing gear pump is poor under the low-speed, high-pressure operating conditions of the volumetric servo speed control system, and it is difficult to establish a full fluid lubricating oil film between the gear ring and the housing. This leads to significant wear and severe heating between the gear ring and the housing. The lubrication performance of the interface moving pair of the electro-hydraulic actuator pump gear ring housing can be improved by designing a reasonable lubrication bearing structure for the gear ring housing. In this study, a multi-field coupling multi-objective optimization model was established to improve lubrication performance and volumetric efficiency. The whole model consists of the dynamic model of the gear ring components, the fluid lubrication model of the gear ring housing interface, the oil film formation and sealing model considering the influence of temperature, and the multi-objective optimization model. The comprehensive performance of the straight-line conjugate internal meshing gear pump was verified experimentally using a test bench. The results show that the lubrication performance is improved, the mechanical loss is reduced by 31.52%, and the volumetric efficiency is increased by 4.91%.
在容积伺服调速系统的低速、高压运行工况下，直线共轭内啮合齿轮泵的润滑性能较差，在齿圈与壳体之间难以建立起全流体润滑的油膜。这导致齿圈与壳体之间出现严重磨损和发热。通过为齿圈壳体设计合理的润滑轴承结构，可以改善电液执行器泵齿圈壳体接口运动副的润滑性能。在本研究中，建立了一个多场耦合多目标优化模型，以提高润滑性能和容积效率。整个模型由齿圈部件的动力学模型、齿圈壳体接口的流体润滑模型、考虑温度影响的油膜形成与密封模型以及多目标优化模型组成。使用试验台对直线共轭内啮合齿轮泵的综合性能进行了实验验证。结果表明，润滑性能得到改善，机械损失降低了31.52%，容积效率提高了4.91%。
