Vibration Research Of BJL5 Three-level Forest Fire Pump

The BJL5 three-level forest fire pump has many advantages such as small volume, light weight and highest lift to 120 m, which is a result of further research of the two-level forest fire and developed by the Institute of Technology of Beijing Forestry University. The development of the three-level forest fire pump makes the head of the pump increase greatly. The new type of pump has higher efficiency and practicability in the process of forest fire prevention. The most research of three-level pump mainly focus on performance parameters such as flow, head, power, axial force,but with the rapid development of computational fluid dynamics and computer technology, simulation of pump’s internal flow attracts more and more attentions. Therefore research of multi-stage pump makes a great sense to engineering application and economic efficiency.The research object of this paper is the BJL5 three-level forest fire pump. With the theories of fluid mechanics, finite element and vibration, a research of vibration response is carried out by the method of modern experimental science and technology and computer aided engineering software. The main work presents:1. Three-dimensional model of the pump flow is built up by SolidWorks. By carrying out the simulation by ANSYS CFX, the distribution of velocity and pressure is found based on the research and the exciting force of fluid to pump is got by simulation calculation.2. On the basis of pump’s physical dimensions, Three-dimensional model of the pump is created by SolidWorks. Vibration response is simulated and calculated by ABAQUS software. The natural frequency is got by the analysis. meanwhile, Vibration response characteristics is also presented, which provide data basis for improvement.3. The experiment is designed to get actual vibration response of pump under work condition. Then actual vibration response data is contrasted with the simulation data, which proves the feasibility of method of the finite element calculation model. This method provides references for flow field simulation and vibration response...