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3747 液压静力压桩机液压系统改造-总体部分设计 液压 静力 压桩机 系统 改造 总体 部分 设计

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3747 液压静力压桩机液压系统改造-总体部分设计,3747,液压静力压桩机液压系统改造-总体部分设计,液压,静力,压桩机,系统,改造,总体,部分,设计

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液压静力压桩机液压系统总体部分设计液压静力压桩机液压系统总体部分设计摘要在土木工程施工过程中,首先要进行的是基础施工.桩基础是建筑施工特别是高层建筑施工中最为常见的基础形式.近年来兴起的静力压桩机由于具有非常明显的环保性,十几年来从广东珠江三角洲开始由南向北得到了迅速的推广.液压静力压桩机具有操作简便、工作效率高、无噪声和无气体污染等优点，在预制桩的施工过程中得到广泛的运用。目前在很多城市特别是沿海地区，静力压桩机已经很普及。对比选择各基本回路，拟订了静力压桩机的液压系统原理图 。比较恒流量和准恒功率两种液压系统设计方法，选用准恒功率设计法设计了ZYJ800 型液压静力压桩机的液压系统。对液压系统各元件选型，并对压桩液压缸、油箱进行了设计计算。本次设计中，我主要对液压静力压桩机的液压系统进行设计计算跟校核方面的工作，由于传统液压系统采用恒流量设计，系统功率按满足最大流量和额定压力的要求进行配置，与实际工况不相适应，在压桩的大部分低阻力阶段，都处于“大马拉小车”的工作状况，而进入高阻力阶段时，由于阻力大，必然导致压桩速度下降，多余的高压油的压力只能以热能的形式从溢流阀泄走，而导致整个压桩过程能耗高，工作效率低。现有的液压技术比较好地解决的这个问题，采用“边桩”和“角桩”，特别是高承载力管桩、薄壁管桩的广泛使用和 H 型钢的出现，使大家对其发展有了更新的认识。关键词：液压静力压桩机；液压系统； 恒流量设计液压静力压桩机液压系统总体部分设计THE GENERAL PARTS DESIGNING OF HYDRAULICSTATIC PILING MACHINEABSTRACTIn the course of civil engineer ing construction, first of all is the foundation tocarry out the construction. Pile foundation construction, especia lly construction ofhigh-rise build ing construction forms the basis of the most common. In recent yearsthe rise of the static pile driver is very obvious because of the environmentalprotection, and over the past decade from the beginning of the Guangdong Pearl Riverdelta from south to north have been rapid ly promoted.Hydraulic static pile driver is simple, efficient, no noise and no gas pollution, etc.,in the construction of precast pile is widely used. At present, in ma ny cities, especia llyin coastal areas, Static pile driver is very universa l. pile driver describes the staticstructure of the composition and working principle. Comparative selection of the basiccircuit, the development of a static pile driver schematic of the hydraulic system.Comparison of consta nt flow and quasi-consta nt power of two hydraulic systemsdesign methods, selection of the design of quasi-consta nt power law designedhydraulic ZYJ800 static pile driver of the hydraulic system.I pressed on the hydraulic system of design hydraulic static pile driver andcalculation work with the check, the actual working conditions are incompatible, inthe piling stage most of the low resista nce, are in a big car Mara working conditions,and access to high-resista nce stage, as a result of resista nce, and will inevitably lead topressure drop in the rate of pile , extra pressure of the oil can only be the form ofheating away from the relief valve to vent, low efficiency. Existing hydraulictechnology is better to solve this problem, the pile side and pile angle, especia llyhigh-capacity pipe, the extensive use of thin-wa ll pipe pile and the emer gence of H-typed steel, so that we