| In many industries,abrasive jets plays a very important role,such as abrasive cutting,abrasive polishing,and the so.Nowadays,there are two main problems in the abrasive jet technology: First,the abrasive in the pre-mixed abrasive jet abrasive tank is limited,and the abrasive must be added after the shutdown to continue working.Second,the post-mixed abrasive can work continuously,but the energy efficiency of the system is low.In this paper,the electromagnetic emission technology is applied to the research of abrasive jet,and the abrasive jet generating device is established by the principle of electromagnetic induction.The material of the abrasive is metal,and the force is from the electromagnetic force;the abrasive particles are different from the conventional abrasive because the diameter of the abrasive has a great relationship with the magnitude of the electromagnetic force received.The main research results are as follows:The principle,main structure and classification of electromagnetic gun in the basic theory of electromagnetic emission technology are analyzed.The synchronous induction coil gun used in this paper is analyzed.The structure,principle and factors affecting system efficiency are analyzed in depth.The basic characteristics of solid-phase particles in liquid-solid two-phase flow,the resistance,acceleration force and uneven force of solid phase particles moving in fluid are analyzed,and the force of single abrasive particles in the pipeline is analyzed.The equation was established for its motion process.Designed and built a platform for electromagnetic abrasive jet generator.The optimal launch position of the abrasive acceleration was studied by Ansys Electro-magnetics suits electromagnetic simulation software.The results showed that the optimal launch position of cylindrical abrasive is the abrasive tail.-9mm from the entrance of the acceleration coil,the optimal launch position of the spherical abrasive is the distance of the end of the abrasive from the entrance of the acceleration coil is-6mm.The distribution map of the magnetic field generated by the device is analyzed,which reveals the optimal emission position and magnetic field of the abrasive.relationship.The spherical abrasives with different parameters and cylindrical abrasives were tested at different voltages.The velocity data was obtained to obtain a spherical abrasive with a diameter of 8 mm and a mass of 2 g and a final diameter of cylindrical abrasive with a length of 15 mm and a diameter of 8 mm and a mass of 5g.The same results were obtained by simulating software simulations of spherical and cylindrical abrasives with different parameters at different voltages using a single-stage accelerator.Using Ansys Electromagnetics suits electromagnetic simulation software to carry out parametric analysis of spherical abrasives and cylindrical abrasives with different parameters,analyze the speed curve and position curve obtained by simulation,and obtain spherical abrasive with diameter of 8mm and mass of 1.5g.The final speed of cylindrical abrasives with a diameter of 8 mm,a length of 10 mm and a mass of 2.5 g is the largest.The Fluent fluid simulation software was used to simulate the speed and pressure of the abrasive in the water movement of the medium and the velocity distribution of the medium water in the pipe.The speed of the abrasive was attenuated very quickly in the water,and the velocity of the medium water in the pipe was evenly distributed.The speed of 300 mm away from the direction of abrasive movement has been extremely small,so the length of the accelerating tube should not be too long.Figure [48] table [3] reference [53]... |
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