大枣全自动输送定向切片机设计与应用效果

Design and application effects of automatic conveying and directional slicer for jujube

为了解决大枣切片生产效率低、切片厚度不均匀、造碎率大、卫生状况差、安全性差等难题。该文在大量调研和综合分析现有设备的基础上,利用现代设计制造技术、食品加工技术和控制技术,通过对大枣加工工艺过程进行分析研究,设计了一种大枣全自动输送定向切片设备,确定了该设备的主要技术参数,对关键零部件进行了设计计算;研究分析了切片过程中切片速度与造碎率之间的关系,优化了切片速度等参数,减少了造碎率,当切片速度为15.9r/min时,造碎率在4%以内;采用实验室中试验和企业大批量生产试验相结合的方法,进一步修改完善了试验样机。试验结果表明该设备具有造碎率低、生产效率高等优点,在企业中使用,平均生产效率达到300kg/h以上,成品率达到96%以上,取得良好的效果。

In the course of deep processing of jujube, the drying time of jujube slice is shorter than that of the whole jujube, resulting in lower energy consumption and higher added value. So, cutting jujube into slices is an important process after the storing process, but the manual production mode suitable for small workshop is still adopted in most enterprises at present, and it is difficult to meet the large seasonal market demand of jujube due to low efficiency, high labor cost, uneven slice thickness, higher breakage rate, poor sanitary conditions and poor safety. In order to solve the above problems, based on a lot of comprehensive investigations and analysis of the present equipments, a kind of directional slicing machine with automatic conveyor for fresh oblong jujube was designed by using modern design and manufacturing technology, food processing technology and controlling technology after analyzing and researching on the processing of jujube. The device was mainly composed of transmission system, transmission orientation mechanism, protecting plate device, cutting device and etc. The jujube was placed in the hopper above the roller at first, when the roller conveys the jujubes, the roller will revolve on its own axis driven by the action of friction plate, and the rotation of the roller will lead to the rotation of jujubes, and make the axis of jujube parallel to that of the roller, and realize the automatic orientation of the jujube. Following, when the jujube was conveyed to the slicing device on the right end of the equipment, it will be cut into slices with the thickness of 5-6 mm under the driving of feeding wheel. The main technical parameters of the equipment were determined based on the design calculation of the key components, and the structures of the transmission system, protecting plate device and slicing device were discussed, the effect of blade force, blade tilt angle and other factors on breaking rate were analyzed. The calculation and analysis showed that the cutting effect was better with the inclination angle between the blade and the horizontal direction of 27°, and the breakage rate was 2.7%-3.6% with 10 to 22 r/min of the feeding wheel speed .The production efficiency in actual enterprise produce exceed 300 kg/h, and the yield rate exceed 96%.