3746 液壓靜力壓樁機(jī)液壓系統(tǒng)改造

3746 液壓靜力壓樁機(jī)液壓系統(tǒng)改造,液壓,靜力,壓樁機(jī),系統(tǒng),改造 液壓靜力壓樁機(jī)液壓系統(tǒng)總體部分設(shè)計(jì)液壓靜力壓樁機(jī)液壓系統(tǒng)總體部分設(shè)計(jì)摘要在土木工程施工過程中,首先要進(jìn)行的是基礎(chǔ)施工.樁基礎(chǔ)是建筑施工特別是高層建筑施工中最為常見的基礎(chǔ)形式.近年來興起的靜力壓樁機(jī)由于具有非常明顯的環(huán)保性,十幾年來從廣東珠江三角洲開始由南向北得到了迅速的推廣.液壓靜力壓樁機(jī)具有操作簡(jiǎn)便、工作效率高、無噪聲和無氣體污染等優(yōu)點(diǎn)，在預(yù)制樁的施工過程中得到廣泛的運(yùn)用。目前在很多城市特別是沿海地區(qū)，靜力壓樁機(jī)已經(jīng)很普及。對(duì)比選擇各基本回路，擬訂了靜力壓樁機(jī)的液壓系統(tǒng)原理圖 。比較恒流量和準(zhǔn)恒功率兩種液壓系統(tǒng)設(shè)計(jì)方法，選用準(zhǔn)恒功率設(shè)計(jì)法設(shè)計(jì)了ZYJ800 型液壓靜力壓樁機(jī)的液壓系統(tǒng)。對(duì)液壓系統(tǒng)各元件選型，并對(duì)壓樁液壓缸、油箱進(jìn)行了設(shè)計(jì)計(jì)算。本次設(shè)計(jì)中，我主要對(duì)液壓靜力壓樁機(jī)的液壓系統(tǒng)進(jìn)行設(shè)計(jì)計(jì)算跟校核方面的工作，由于傳統(tǒng)液壓系統(tǒng)采用恒流量設(shè)計(jì)，系統(tǒng)功率按滿足最大流量和額定壓力的要求進(jìn)行配置，與實(shí)際工況不相適應(yīng)，在壓樁的大部分低阻力階段，都處于“大馬拉小車 ”的工作狀況，而進(jìn)入高阻力階段時(shí)，由于阻力大，必然導(dǎo)致壓樁速度下降，多余的高壓油的壓力只能以熱能的形式從溢流閥泄走，而導(dǎo)致整個(gè)壓樁過程能耗高，工作效率低?，F(xiàn)有的液壓技術(shù)比較好地解決的這個(gè)問題，采用“邊樁”和“角樁”，特別是高承載力管樁、薄壁管樁的廣泛使用和 H 型鋼的出現(xiàn)，使大家對(duì)其發(fā)展有了更新的認(rèn)識(shí)。關(guān)鍵詞：液壓靜力壓樁機(jī)；液壓系統(tǒng)； 恒流量設(shè)計(jì)液壓靜力壓樁機(jī)液壓系統(tǒng)總體部分設(shè)計(jì)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 have an further understa nding of the development.Key words: hydraulic static piling machine; hydraulic system; consta nt flowdesign