液压缸驱动履带行走机构设计及仿真

发布时间：2018-01-06 22:13

本文关键词：液压缸驱动履带行走机构设计及仿真　出处：《大连理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：风电、核能、化工等重型工业的建设,推动大吨位履带起重机的发展。大吨位履带起重机对其履带行走机构提出了更高的要求。行走机构作为整机的支撑,要有足够的承载能力；同时,要有足够的牵引力驱动整车行走、运行平稳。大吨位履带起重机行走机构具有载荷大、行走距离短的特点。现有的履带行走机构多采用液压马达驱动,马达扭矩很难满足行走要求,且马达的连续回转特性未能得到充分发挥。鉴于此,本文利用液压缸驱动能够产生较大推力的优点,提出一种用液压缸作为行走机构的执行元件的驱动方式。在相同的行走载荷下,选择液压缸驱动的成本为马达驱动成本的10%。论文以QUY750履带起重机为研究对象,计算液压缸驱动履带行走机构的行走载荷参数,对液压缸驱动行走机构不同的驱动方案进行了设计和比较分析,确定了行走机构的最终驱动方案。由于液压缸驱动履带行走机构的工况与原机构不同,基于有限元理论,利用ANSYS建立履带架、支撑耳座、履带板、驱动齿与梯形梁等主要承载结构件的有限元模型,完成载荷及边界条件的施加,进行了各结构件的强度校核。由于液压缸行程较小,设计了两组液压缸交替驱动实现履带的连续行走。为了分析两组液压缸驱动衔接时行走速度波动情况,本文利用虚拟样机技术,建立QUY750马达驱动履带行走装置和液压缸驱动行走机构的虚拟样机模型,进行动力学仿真分析,获得了两种机构的行走速度随时间变化的曲线；以行走的平顺性作为评价指标,讨论了液压缸驱动履带行走机构的正确性及可行性。本文完成了QUY750履带起重液压驱动行走机构的设计、有限元分析和动力学仿真分析,降低了大吨位履带起重机行走机构的成本。研究工作为大吨位履带起重机行走机构的设计、仿真提供参考。
[Abstract]:The construction of wind power, nuclear, chemical and other heavy industry, promote the development of large tonnage crawler crane. Large tonnage crawler crane has put forward higher requirements on the crawler walking mechanism. As the support, to have sufficient bearing capacity; at the same time, there must be enough traction force to drive the vehicle to walk, running smoothly.
Large tonnage crawler crane walking mechanism with large load, short walking distance. The characteristics of the existing multi crawler mechanism driven by a hydraulic motor, the torque of the motor is difficult to meet the requirements of walking to continuous rotary motor characteristics and given full play. In view of this, the advantages of using hydraulic cylinder drive can produce greater thrust, the driving mode a hydraulic cylinder as the actuator. The walking mechanism of walking load under the same choice as the cost of a 10%. motor drive hydraulic cylinder to drive the cost
The QUY750 crawler crane as the research object, calculate the walking load parameters of crawler drive hydraulic cylinder, the hydraulic cylinder to drive the walking mechanism of different driving schemes are designed and compared, and the final drive scheme of the walking mechanism. The hydraulic cylinder driving a crawler mechanism under different conditions with the original mechanism, finite element theory based on the establishment of crawler frame using ANSYS, support ear seat, track plate, driving finite element beam trapezoidal tooth and the main bearing structure of the model, complete the applied loads and boundary conditions, the strength checking of the structure. Because the hydraulic cylinder stroke is small, two sets of hydraulic cylinders alternately drive continuous walking track to achieve in order to design. Walking speed fluctuation analysis of two groups of hydraulic cylinder driving interface, using virtual prototype technology, the establishment of QUY750 motor driven crawler walking device and liquid The virtual prototype model of the cylinder driven travel mechanism is simulated and analyzed, and the curves of the walking speed of the two mechanisms with time are obtained. Taking the ride comfort as an evaluation index, the correctness and feasibility of the hydraulic cylinder driven crawler walking mechanism are discussed.
In this paper, we completed the design of QUY750 crawler crane hydraulic drive travel mechanism, finite element analysis and dynamic simulation analysis, which reduced the cost of large tonnage crawler crane's walking mechanism. The research work provides a reference for the design and Simulation of large tonnage crawler crane's walking mechanism.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH213.7

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