Structural Design And Optimization Of The Water-Air Thruster

The water-air thruster is a key component of the cross-domain marine robot,which can help the cross-domain marine robot realize the movement in the water/air two media.This paper proposes a reasonable,high-efficiency,high thrust-to-weight ratio water-air propulsion program,and designs and optimizes the key components of the propeller,and finally develops a water-air thruster with excellent performance.The main research contents are as follows:First,it introduces the domestic and foreign water-air thruster and single-medium propellers in detail,and summarizes the existing propulsion technology.According to the proposed performance indicators and from the engineering point of view,the adopted underwater and air propulsion schemes are integrated,and a dual-motor+single-propeller propulsion scheme is proposed.According to the movement requirements of the developed cross-domain marine robot,it is determined The overall parameters of the thruster.Secondly,this paper conducts a preliminary design of the hydrodynamic components of the water-air thruster,establishes the 3D geometric model of the thruster,and uses the CFD numerical calculation platform STAR CCM+to study the hydrodynamic characteristics of the thruster.And through a step-by-step optimization strategy,focusing on the air propulsion performance to optimize the power of the hydrodynamic shape,determine the final structural parameters of the water-air thruster,and conduct a strength check.Then,based on the overall layout of dual motors+single propellers,a non-contact clutch with centrifugal force+fluid impact force as the compression element is proposed,and the wedging mechanism of the clutch is studied,and the CFD numerical method is used to analyze the flow of water.The influence of wedge pressing force.The wedging stability and the wedging threshold speed of the wedge are optimized by increasing the impact torque of the fluid.The dynamic simulation platform is used to verify the feasibility of the clutch scheme and the rationality of the optimization in this paper.Finally,the various parts of the thruster were processed,purchased and assembled,and the prototype of the thruster was developed.The relevant performance test of the principle prototype was carried out,and it was installed on the cross-domain marine robot for diving and real flight,which confirmed the feasibility of the water-air propulsion scheme in this paper.