关键词: 灌溉泵, 数值模拟, 强度校核, 转子动力学

Abstract:  Irrigation is a means to ensure the stable development of agriculture. With the development of modern agriculture, the demand for irrigation pumps is increasing. High flow irrigation pumps are often characterized by large and wide vanes due to their unique operating conditions and requirements. As an important part of the rotor system, the deformation and strength of the impeller and rotor components have a great impact on the safety performance and efficiency of the whole system of the irrigation pump. This paper took large flow irrigation pump as the research object, and used AnsysWorkbench software to conduct finite element analysis on its large flow area. The deformation and strength analysis and modal analysis of the rotor components were carried out separately. The results showed that when the flow rate was 500 m3/h, the maximum equivalent stress of the blade was 23.83 MPa, and the maximum deformation value of the blade was 0.341 mm, and the maximum deformation area appeared at the edge of the blade. Under the condition of large flow, compared with the natural frequencies of different flow conditions, there is no significant relationship between the flow size and the natural frequencies of the rotor system in the vibration modes of each stage, but different materials have a significant impact on the natural frequencies of the rotor of the high flow irrigation pump.

Key words: irrigation pump, numerical simulation, strength check, rotor dynamics