Abstract:In deep sea area, fishing in large cage aquaculture is low efficiency and high labor intensity, and the fish injure rate of fishing appliances such as fish pump is high, so it needs to be equipped with high-power generation system, which is not suitable for small and medium sized fishing boats. An internal guide vane drum machine was designed for fishing which had lower power consumption by the screw conveying principles. And there was no such appliance in marine aquaculture. According to the structure simulation, the relationship between deformation, equivalent stress, speed and dip angle was got, as well as the position where had the maximum equivalent stress between the drum’s surface helical vane and drum’s inner wall was located. As the simulation shown, stress concentration occurred in support shell of binding force in bearing. The experimental setup was designed and optimized according to the simulation results. When the length of the drum was certain, the potential energy of transported fish was related to different dip angle. The transmission rate to fish potential energy was defined as the appliance effective transmission. A special formula can be used to be the criterion of optimizing the control scheme. The numerator of this formula was an interpolation equation of effective transmission rate at different speeds. The denominator of this formula was an interpolation equation of power consumption at different speeds. The reliability, power consumption and fish injure rate experiments were conducted. The results demonstrated that there was an optimal control scheme under certain constraints, it was the drum with parameters of 10°dip angle and 15.3r/min speed. Moreover, the optimized rotating speed of the drum was 15r/min under different dips. The experimental results showed a lower fish injure rate of 0.1%, which improved the quality of fishing.
