Study On Sequential And Continuous Feeding Method Of Fresh Lotus Seeds

In the process of mechanical de-centering of fresh lotus seeds,how to ensure continuous feeding and avoid damage to lotus seeds during the feeding process is the key to achieve high-quality and efficient processing of fresh lotus seeds.In order to solve the problems of blocking and damaging the lotus seeds in the existing feeding methods of fresh lotus seeds,this paper studies a low-damage single continuous feeding method for fresh lotus seeds,and designs a linear vibrator,vibrating feeding plate,stirring gas nozzle and roller.A single continuous feeding system composed of sub-chains,etc.,and the vibration feeding process of fresh lotus seeds is simulated and analyzed,the flow field distribution of the stirring air flow is studied,and the relevant process parameters are obtained..The main research contents of the paper are as follows:（1）Design of a sequential and continuous feeding system for fresh lotus seeds.Based on the requirement of continuous single-piece conveying of fresh lotus seeds,a continuous feeding device composed of feeding tray,discharge chute,stirring gas nozzle and linear vibrator is designed,and the fresh lotus seeds are realized by moving and cooperating with the feeding pipe and roller chain.Single delivery function.Based on the size dispersion range of fresh lotus seeds,by establishing the geometric relationship model of the feeding tube-fresh lotus seeds-roller,the key points such as the distance h from the bottom of the feeding tube to the top of the groove of the roller,and the groove depth L of the feeding tube are obtained.technical parameter.（2）Simulation analysis of vibration feeding process.The discrete element simulation of the vibrating feeding process of fresh lotus seeds was carried out by using EDEM software,the influence of the structure of the vibrating feeding tray,the vibration frequency and other factors on the feeding continuity of fresh lotus seeds was studied,and the most suitable one was selected from the various structures of the vibrating feeding tray.Vibration plate structure and vibration frequency.（3）Analysis of gas stirring flow field.Using the FLUENT software,the distribution of the gas flow field inside the vibrating feeding tray was analyzed under different air nozzle arrangements.The research shows that:when the air nozzle is arranged on the outside,the air flow from the air nozzle flows down quickly along the dividing plate with a uniform and stable speed.Therefore,the stirring effect is better when the air nozzle is arranged outside the vibrating plate.（4）Modal analysis of vibrating feeder.Using finite element analysis software,the modal analysis of the vibrating feeding device was carried out,and the natural frequencies and mode shapes of the first six orders were obtained.When the modal order is 1,the natural frequencyωis 17.36 Hz.When the external excitation frequencyω₀≤12 Hz,ω₀<0.7ωis satisfied,no resonance phenomenon occurs;whenω₀>12Hz,ω₀>0.7ωis satisfied,and resonance phenomenon occurs;when the modal order is greater than 1,the natural frequencies of each order of the continuous feeding device show an increasing trend with the increase of the order,and the excitation frequencyω₀applied to the vibrating disc by external factors satisfies the condition ofω₀<0.7ω,so it does not occur.resonance phenomenon.（5）Vibration feeding test test.Based on the above theoretical research results,a single continuous feeding device for fresh lotus seeds was designed and manufactured,and it was installed on the fresh lotus seed coring machine developed by the research group in the early stage,and the fresh lotus seed feeding experiment was carried out.The test results show that the single continuous feeding device for fresh lotus seeds studied in this paper has an average empty position rate of 0.37%,an average single delivery rate of 99.67%,and an average fresh lotus seed damage rate of 0.20%,which can meet the requirements of the lotus seed core removal equipment.delivery requirements.