双面高效绿篱修剪机的研究与设计

发布时间：2018-05-12 17:00

本文选题：双面修剪机 + ADAMS仿真　；参考：《广西大学》2014年硕士论文

【摘要】：我国高速公路发展迅速,而绿篱带的建设已经成为高速公路建设的主体部分之一,其修剪任务非常繁重。通过对国内外绿篱修剪技术的分析,并实地考察国内高速公路绿篱修剪的现状,研发一种针对高速公路绿篱修剪的设备,可以在保证修剪质量的同时,有效减少工人劳动强度。为了提高修剪效率,缩短被修剪路段的封锁时间,确定了具有双面修剪功能的整机方案,并对修剪机的功能进行总体规划；对水平和竖直修剪机构进行具体的设计,并计算选取承载车；在设计选取水平修剪机构底部的转动装置时,发现目前常见的转动装置所采用的传动方式应用在此不够便捷,因此,本文设计一种新型的回转台,能够通过液压缸的伸缩长度确定其旋转角度,适用于具有与水平修剪机构相类似回转动作的产品。在三维软件Pro/E中建立模型后,利用ANSYS对水平和竖直修剪机构进行有限元静力分析,根据结果对修剪机构进行结构优化设计,并对优化后的机构重新进行分析校核,确保其具有足够的刚度和强度；通过对两个修剪机构进行模态分析,证明地面和刀具的激振频率均能避开其固有频率而不发生共振；利用多体动力学分析软件ADAMS,分别对修剪机构和整机进行了运动学和动力学仿真,检验修剪机动作过程中无“死点”并且未发生干涉；通过仿真,获得整个动作过程中各液压缸受力曲线,从而发现机构的缺点并提出改进方案,同时根据液压缸受力计算选取液压缸和动力源；由于工作时修剪机构的外伸使整车重心偏移,影响承载车的操控性,借助于动力装置设计可移动配重机构,通过仿真对配重前后轮胎的受力情况进行分析对比,结果表明该设计能有效解决修剪机进行修剪工作时的重心偏移问题,改善承载车的操控性能,并降低因整车重心偏移而发生侧翻的可能性。本文完成了整个双面高效绿篱修剪机的设计和关键部件的校核工作,并根据需要做了相关的仿真研究。结果表明本文设计的绿篱修剪机是合理可行的,按该设计生产的产品可以应用于高速公路绿篱的修剪。
[Abstract]:The highway of our country develops rapidly, and the construction of hedge belt has become one of the main parts of highway construction, and its pruning task is very heavy. Based on the analysis of the pruning technology at home and abroad and on the spot investigation of the current situation of the domestic highway hedgerow pruning, a kind of equipment for freeway hedgerow pruning has been developed, which can effectively reduce the labor intensity of the workers while ensuring the pruning quality. In order to improve the pruning efficiency and shorten the blocking time of the pruned section, the scheme of the whole machine with double-sided pruning function is determined, and the overall function of the pruning machine is planned, and the horizontal and vertical pruning mechanism is designed concretely. In the design of the rotary device at the bottom of the horizontal pruning mechanism, it is found that the transmission mode used in the current common rotary device is not convenient enough. Therefore, a new type of rotary table is designed in this paper. The rotary angle can be determined by the extension length of the hydraulic cylinder, which is suitable for the products with rotary action similar to the horizontal pruning mechanism. After establishing the model in 3D software Pro/E, the static finite element analysis of horizontal and vertical pruning mechanism is carried out by using ANSYS, and the structural optimization design of the pruning mechanism is carried out according to the results, and the optimized mechanism is analyzed and checked again. Through the modal analysis of the two pruning mechanisms, it is proved that the exciting frequency of the ground and the cutting tool can avoid the natural frequency without resonance. The kinematics and dynamics simulation of the pruning mechanism and the whole machine are carried out by using the multi-body dynamics analysis software Adams. The results show that there is no "dead point" and no interference occurs during the pruning process. The stress curve of each cylinder is obtained during the whole process of operation, and the defects of the mechanism are found and the improvement scheme is put forward. At the same time, the hydraulic cylinder and the power source are selected according to the force of the cylinder, and the center of gravity of the whole car is offset by the extension of the pruning mechanism. Affecting the maneuverability of the load-bearing vehicle, with the help of power device to design the movable counterweight mechanism, through the simulation to analyze and compare the force situation of the tire before and after the weight distribution, The results show that the design can effectively solve the problem of barycenter deviation in pruning machine, improve the handling performance of the vehicle, and reduce the possibility of rollover due to the shift of the barycenter of the whole vehicle. In this paper, the design of the two-sided high-efficiency hedgerow trimmer and the checking of the key parts are completed, and the relevant simulation research is done according to the need. The results show that the hedgerow pruning machine designed in this paper is reasonable and feasible, and the products produced according to the design can be applied to the pruning of freeway hedgerows.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU986.32

【参考文献】