Design and test of balanced shaking system for boat-borne bait feeding device

Abstract:

In order to solve the problems of high crushing rate caused by carrying traditional feeding machine directly in the boat-borne shrimp pond bait device and the deviation of hull center of gravity greatly affecting the draught depth of propeller in the process of feeding, a balanced shaking system of special feeding device was designed. The system makes use of the motor to drive the eccentric wheel to rotate to produce the difference of the cycle change, and makes the feed box jitter as a whole through the compound action of several support frames, so as to ensure the uniform feeding and reduce the breaking rate of the feed at the same time. The whole jitter feeding mode with adjustable fixed fulcrum position of the system was adopted to realize the long distance lossless feed transportation, which solves the problem that the tail driving part of the hull changes too much waterline due to the change of the center of gravity position, and makes the driving efficiency of the propeller more stable. Through the mathematical model of the shaking system, the optimal eccentricity of the vibration system is obtained. The optimal point position analysis of the squeezing device bracket is carried out by the torque balance equation. The motor energy consumption test and the design of the rotating bracket and the box slope were carried out. The calculation and analysis show that when the eccentricity is 1.2 mm and the fulcrum position is (-40, 0), the DC motor is used as the vibration source motor with the rated speed of 2 600 r/min. The actual working power is lower than 80 W, and the feeding rate is close to the average value of 1.63 kg/min. The field test shows that compared with the bait tank at the rear part of the boat, the variation of full load and no load draught in the driving part is reduced from 10.2 cm to 7.3 cm, and the average working speed of the feeding device is 1.03 m/s, the feeding was uniform and the crushing rate is low. The system is suitable for field environment, with low cost of production and maintenance, simple and reliable structure, and it is easy to popularize and apply, and has high practical value.