150kNm旋挖钻机液压系统仿真与实验研究

发布时间：2018-06-18 11:20

本文选题：旋挖钻机 + 液压系统　；参考：《长安大学》2011年硕士论文

【摘要】：旋挖钻机是一种以动力头带动钻具旋挖为主，配以起吊、回转、行走、变幅等作业装置，广泛应用于灌注桩作业中的施工机械。近年来，旋挖钻机的各项技术指标在工程机械领域中有了长足的发展，液压系统作为多项技术指标中最重要的指标之一，其优劣性对系统工作的稳定性有重要的影响。本文对该型号旋挖钻机的主要液压回路即主卷扬回路、动力头回路、加压油缸回路等进行了工作参数核算和发热功率校核，计算结果表明该系统工作参数都在系统元件的额定范围之内，与其他工况相比较，主卷扬下放工况中，钻杆重力势能全部转化为热能，，发热严重；建立了基于AMESim的液压系统仿真模型，对主卷扬下放工况和旋挖加压复合动作两种工况进行了仿真，仿真结果表明主卷扬下放工况和动力头旋挖复合动作工况为系统节流压力损失最大工况；对旋挖钻机液压系统进行了实际作业工况下的实验，结果与理论计算、仿真保持一致，说明了理论计算和建立的仿真模型是正确的；对比计算、仿真和实验的结论，针对动力头旋挖及加压油缸加压的复合动作过程中存在的发热问题，提出了改进方案，给出了液压系统原理图，利用AMESim进行了建模仿真，并且与原系统仿进行了对比，证明了改进方案的可行性，为进一步的研究提供了理论基础。
[Abstract]:Rotary drilling rig is a kind of construction machinery, which is mainly driven by power head and equipped with lifting, rotating, walking and changing amplitude. It is widely used in cast-in-place pile operation. In recent years, the technical indexes of rotary drilling rig have made great progress in the field of construction machinery. As one of the most important indexes of many technical indexes, hydraulic system has an important influence on the stability of system work. In this paper, the main hydraulic circuit of the rotary drilling rig, that is, the main hoisting loop, the power head loop and the pressurized cylinder loop, are calculated and checked for the heating power. The calculation results show that the working parameters of the system are within the rated range of the system components. Compared with other working conditions, the gravity potential energy of the drill pipe is all converted into heat energy and the heat is serious. The simulation model of hydraulic system based on AMESim is established. The simulation results show that the maximum pressure loss of the system is under the conditions of the main hoist-down operation and the combined operation of the power head, and the experimental results of the hydraulic system of the rotary drilling rig are in accordance with the theoretical calculation, and the simulation results are consistent with those of the theoretical calculation. It is proved that the theoretical calculation and the established simulation model are correct, the conclusion of comparison calculation, simulation and experiment is given, and the improved scheme is put forward in view of the heat problem existing in the compound action of rotary digging of power head and pressurization of pressurized cylinder. The schematic diagram of hydraulic system is given, and the modeling and simulation are carried out by using AMESim, and compared with the original system, the feasibility of the improved scheme is proved, and the theoretical basis for further research is provided.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TU67;TH137

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