Experimental Research And Prototype Design Of Water Jet Stripping Bay Scallop Adductor Muscle

In view of the scallop production increased year by year in our country, the national living standard and the continuing escalation of consumption structure, The demand of scallop products also on the increase year by year, Scallops stripping method research and scallop automatic stripping equipment development is increasingly important. At present, Scallops strip shell meat by scallops stripping machine made at home and abroad still exists several problems such as the poor quality, by-product recycling inconvenience, waste of serious and many other problems. The thorough research had been carried on according to current situation of domestic scallop processing and scallops stripping methods, stripping machines at home and abroad, This paper determined to use the water jet stripping method of bay scallop and designed the water jet stripping adductor muscle test prototype based on the method.Through the advantages and disadvantages analysis of the existing bay scallop adductor muscle stripping methods and the feasibility of using water jet stripping adductor muscle, this paper determined to use water jet stripping method for adductor muscle and the mathematical model of stripping process was built. Through the comparative analysis of the characteristics of different types of jet and stripping effect, the best jet type used in adductor muscle stripping-not submerged continuous water jet was determined. Based on previous research results of the project group, this paper determined to use narrow Angle fan nozzle as adductor muscle stripping nozzle. Through analysis, the inside geometric parameters of the nozzle that affect the internal flow was obtained, namely, the contract Angle, exit section length and outlet diameter.Through the analysis of the state of the internal flow in the nozzles, this paper concluded that the mathematical model which the internal flow should satisfy, the turbulence model which was suitable for the internal flow, the solution for the flow near the nozzle wall, the discrete method for the domain control equation and the solution method for the flow field inside.The optimal geometric parameters inside the nozzle was determined by building 3d model of nozzles with different contract angles, different exit section lengths and different outlet diameters, using CFX software to simulate for each model, and the comparative analysis of the simulation results and the verification test of adductor muscle stripping effect.Through the survey of the coordinate of the bay scallop adductor muscle and the fitting of the shell curve, this paper obtained the minimum angle of incidence of water jet when the bay scallop adductor muscle was stripped. Through the single factor experimental study, the parameter value scope of the jet pressure, the angle of incidence and the injection distance which affect the stripping effect were determined. Box-Behnken design experiment design and response surface method was applied to analysis the test data, the mathematical models that the stripping effect evaluation standard about the above three parameters was established, through the analysis of the contour map and the response surface figure, the optimal combination of the three parameters above was obtained.Through the analysis of the principle that the water jet stripping adductor muscle, the idea that using jet flow along the shell tangent to strip adductor muscle was put forward and its feasibility was verified by experiment. Based on this method, through the analysis of the mechanical structure, the movement and control function, the mechanical structure and control system design scheme of software and hardware structure of the experimental prototype were determined.