小型剖肠清洗装置的研究

发布时间：2018-04-26 20:11

本文选题：鸡肠 + 剖切　；参考：《山东农业大学》2017年硕士论文

【摘要】：本文在研究了鸡、鸭肠几何特征参数和相关力学特性的基础上,设计并试制了一种针对鸡、鸭肠进行自动剖切清洗的小型装置,该装置利用变频技术,可适应不同作业速度的剖切,调速方便,装置总体尺寸小,生产成本低。既能适应单机作业,又能适应小规模生产的要求,也能以规模化生产的前处理工序为依托,作为肠体的后处理设备,以满足流水化作业要求。在查阅了大量资料,了解了鸡、鸭肠组织结构特点的基础上,对屠宰加工车间中,分腺胃后的鸡肠肠体的外观几何特征进行了测量;在自制夹具的基础上,利用WDW-5E微机控制电子式万能实验机,以5 mm/min的速度,对鸡肠的极限抗剪切力进行了测量;以实际测量值为依据并结合生产实际,对肠体输送模块、剖切模块等进行了理论分析和计算,实现了剖肠装置的理论化、参数化设计;按照经验数值和设计尺寸,对装置进行了三维实体建模和虚拟样机的装配,进行了干涉检查和整机的评估。运用SolidWorks中的simulation模块和NX8.5中的FEM高级仿真模块,对肠体夹紧链节进行了结构静力学分析及评估,得出了链节受力后的应力集中区域和节点位移趋势。根据夹紧链节夹持时肠体的形状,建立肠体模型,并对其进行了静力学仿真分析,根据有限元解算的结果及分析表明:链节边缘及导槽边缘存在的应力集中是肠体挤压印痕产生的主要原因,这为链节结构的改进和优化指明了方向。结合生产实际和FEM分析结果,通过改变导槽位置、增大边缘过渡圆角以及调整滚轮位置,可有效减少印痕的产生,提高了产品的品质。链节结构改进后效果明显,将间距调节挡板改成滚轮形式,减小了链节的磨损,优化了速度的调节与控制。对传动系统中,多轴链传动进行了设计和理论计算,并按照链轮小包角条件,验证了不需加装惰轮,可以实现无跳齿和连续啮合传动。样机实验表明:在两个剖切系统下,线速度与理论值0.4 m/s接近时,每小时可加工约2000条鸡肠肠体,若通过变频器调速,可适当提高加工效率。肠体剖切率在93%以上,可满足使用要求。
[Abstract]:Based on the study of geometric parameters and related mechanical properties of chicken and duck intestines, a small device for automatic cutting and cleaning of chicken and duck sausage was designed and trial-manufactured. The device uses frequency conversion technology. It is suitable for cutting at different operating speed, convenient speed regulation, small overall size and low production cost. It can be used not only for single machine operation, but also for small-scale production. It can also be used as the reprocessing equipment of enteric body to meet the requirement of running water operation based on the pre-treatment process of large-scale production. On the basis of consulting a large amount of data and understanding the characteristics of the tissue structure of chicken and duck intestines, the appearance and geometric characteristics of chicken intestines after being divided into glands and stomach in slaughtering and processing workshop were measured, and on the basis of self-made jigs, The ultimate shear resistance of chicken sausage was measured with WDW-5E microcomputer controlled electronic universal experimental machine at a speed of 5 mm/min. The theoretical analysis and calculation of the cutting module are carried out to realize the theoretical and parameterized design of the sausage device, and the 3D solid modeling and virtual prototype assembly are carried out according to the empirical value and the design size. Interference inspection and evaluation of the whole machine were carried out. Using the simulation module in SolidWorks and the FEM advanced simulation module in NX8.5, the statics analysis and evaluation of the intestinal clamping chain joint are carried out, and the stress concentration area and the displacement trend of the joint are obtained. According to the shape of the intestinal body during clamping, the model of intestinal body was established and analyzed by static simulation. According to the results and analysis of finite element method, it is shown that the stress concentration at the edge of the chain joint and the edge of the guide groove is the main cause of the indentation of the indentation of the intestinal body, which indicates the direction for the improvement and optimization of the structure of the chain joint. Combined with the actual production and FEM analysis results, by changing the slot position, increasing the edge transition angle and adjusting the roller position, the printing mark can be effectively reduced and the quality of the product can be improved. The effect of the chain joint structure improvement is obvious. The pitch adjusting baffle is changed into the roller form, the wear of the chain joint is reduced, and the adjustment and control of the speed are optimized. The design and theoretical calculation of multi-axis chain drive are carried out. According to the condition of small packet angle of sprocket, it is verified that there is no need to install idler wheel, which can realize no gear jump and continuous meshing transmission. The prototype experiment shows that when the linear velocity is close to the theoretical value of 0.4 m / s, about 2000 chicken intestines can be processed per hour under two cutting systems. If the speed is adjusted by frequency converter, the processing efficiency can be improved appropriately. The rate of intestinal dissection was more than 93%, which could meet the requirement of application.
【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TS251.3

【参考文献】