摘要
基于离心泵的基本原理和集成化思想,提出了一种电动机、液压叶片泵和孔板离心泵三体合一的液压电机泵结构,其中孔板离心泵作为叶片泵的前置辅助泵,用以提高叶片泵的进口压力,保证主泵吸油充足,突现出液压电机泵的结构紧凑、低噪音、效率较高、无外泄漏等优点。应用流场解析技术,获得了孔板离心泵主要结构参数对其升压效果和效率的影响规律,并总结出孔板离心泵的设计原则。研究发现:当离心管倾角为45°、偏角在45°～60°时,孔板离心泵具有显著的升压效果,其消耗的功率占电机泵额定功率的0.41%,表明孔板离心泵的引入对整个电机泵的功率特性影响很小,孔板离心泵自身效率可达95%以上,而包含引油窗孔流道的孔板离心泵的整体效率为22%,孔板离心泵出口至主泵引油窗孔之间的涡流损失是造成孔板离心泵整体效率降低的主要原因。
Based on the principle of centrifugal pump and the idea of compact design, an electric-motor-pump is developed. It is integrated by an electric motor, a hydraulic vane pump and a port-plate centrifugal pump as a compact hydraulic power unit. The vane pump is as the main pump of the unit. The port-plate centrifugal pump is designed specially for the main pump to improve the suction performance of the electric-motor-pump. The integrated pump demonstrates some attractive advantages such as more compact structure, lower noise, higher efficiency and no external leakage. By computational fluid dynamics （CFD） method, the effects of the main structural parameters of the port-plate centrifugal pump on its outlet pressure and the efficiency are investigated. The design rules for the port-plate centrifugal pump are concluded. The simulation results show that the port-plate centrifugal pump can raise the inlet pressure of the main pump obviously. When the slope angle of the eccentric tube is 45° and the bias angle is between 45°-60°, the maximum power consumption is only about 0.41% of the electric-motor-pump, which also shows that the port-plate centrifugal pump almost do not influences the whole power characteristics of the electric-motor-pump. Its efficiency can be above 95 percent, and the whole efficiency of the centrifugal pump including the outlet channel is 22%. Power loss occurs due to eddy flow from the outlet of the centrifugal pump to the outlet channel to the main pump.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2009年第6期199-205,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(50605030)
关键词
液压电机泵
孔板离心泵
流场解析
结构优化
Electric motor pump Port-plate centrifugal pump Flow analysis Structure optimization
