Development and application of simulation technique for hydrokinetic hammer     

Tianye ZHU  Qingyan WANG    Kun YIN    Siyi WANG. College of Construction Engineering  Jilin University  Changchun  China. Key Laboratory of Underground Information Detection Technology  Ministry of Education  Changchun  China 《东北亚地学研究》2007,10(2):196-202

The computer simulation is an important method for hydrokinetic hammer design. Various kinds of simulation measures with their technical characters and applications being taken during the computer aided design are enumerated. Computer simulation supports plenty of valuable references to the designer. Each type of simulation process is used to explore the exact aspect of the performance of hydrokinetic hammer and each type of simulation method has its own excellences and deficiencies. Thus the integrative simulation methods based on modern computational technology are brought forward to obtain the perfect capability of the whole product. Along with the development of computer hardware and software, various kinds of platforms have been provided to different simulation methods that can be carried out with distinct working flows. The jet flow element is the core part of the hydrokinetic hammer. We can build the ideal simulation model of it by means of CFD (computational fluid dynamics) technology. On the other hand, to set up the digital model of piston and hammer, the best way is to build the virtual prototype using automatic dynamic analysis of mechanical system. As a result of the argumentation, we think the technique of Virtual Prototype and CFD are the prime way to process the combined computer simulation for hydrokinetic hammer.  相似文献   

Dynamic simulation of hydrokinetic hammer based on virtual prototyping technology     

WANG Siyi  WANG Qingyan  .College of Construction Engineering  Jilin University  Changchun  China .Key Laboratory of Underground Information Detecting Technology  Education Ministry  China 《东北亚地学研究》2009,12(1):22-27

This study presented the specified steps of comprehensively analyzing the hydraulic-driven hammer system with the application of the Virtual Prototype Technology. By comparing the simulation results with experimental phenomena and data, the correctness of simulation analysis conclusion is verified. Meanwhile, by -means of its perfect visualization, the internal work process which can not be seen before is simulated. The mechanism of some abnormal phenomena encountered during the experiment is explained.  相似文献   

Study on drilling mechanism and optimization of percussion-extruding DTH hammer bit     

LUO Chunhong  ZHENG Zhichuan  CAO Pinlu 《世界地质(英文版)》2009,12(1):36-39

The authors tested the percussion-extruding Down-the-hole(DTH)hammer bit with five different structures and mainly analyzed the drilling mechanism between conical bit and stepped bit. In addition, aiming at "the pile effect" in combination with the advantage of stepped bit, we design a new cam spinning bit and test it outdoors. The result shows that using cam spinning bit can solve the problem of "the pile effect", which can also obtain higher drilling efficiency than using conical bit in high confining pressure strata. It is characterized by novel structure and high drilling speed as well as good guiding, and it is significant for improving efficiency in percussion-extruding drilling technique.  相似文献   

贯通式气动潜孔锤反循环钻进初探     

靳双喜  郭成林 《河南国土资源》1994,(2)

贯通式气动潜孔锤反循环钻进是以压缩空气作为碎岩动力和洗井介质，配用双壁钻杆，实现全孔反循环连续取芯（样）的钻进技术。本文在对反循环钻进机理分析的基础上，提出了反循环钻头的设计依据和原则，并依据野外生产试验资料，确定了贯通式气动潜孔锤反循环钻进的设备配套方案、钻进规程参数和工艺技术措施。  相似文献   

空气反循环连续取样钻探技术在新疆乌什磷钒矿区的应用     

李锋 《探矿工程》2013,40(5):23-25

通过选取合适的钻探设备和合理的钻进参数,空气反循环连续取样工艺在新疆乌什磷钒矿区取得了良好的应用效果。该工程实践表明,在缺水地区及岩矿样难采取的地层,空气反循环连续取样钻探技术取样率可达到100%,施工成本低,经济效益显著。介绍了施工设备、管材的配置及钻探施工工艺。  相似文献   

绳索取心液动锤在浩尧尔忽洞金矿复杂地层中的应用          下载免费PDF全文

姜桂春  韩颂 《探矿工程》2013,40(10):13-15

内蒙古太平矿业浩尧尔忽洞金矿地层复杂,多强硅化的硬、脆、碎地层及部分砂质页岩等风化破碎地层,常规回转钻进地层打滑,钻孔上漂,岩心堵塞,回次进尺少,打捞频繁,纯钻进时间少,台月效率低。采用绳索取心液动锤钻进工艺,克服了上述问题,取得了良好的效果。  相似文献   

潜器在冲击载荷下的运动和控制研究          下载免费PDF全文

程嘉欢  连琏  刘可峰 《海洋工程》2014,32(1):75-83

潜器在水下发射火箭时会产生复杂的运动变化,对其研究很有实际意义。参照格特勒运动方程,建立潜器运动的非线性数学模型。导入实验模型的参数,对其六自由度基本运动进行了仿真,并与水池实验结果相比较,验证了仿真模型的有效性。导入发射火箭时潜器受到的完整载荷,计算分析了不同航速下潜器的运动响应和运动控制。结果表明,发射载荷对潜器运动将产生较长时间的显著影响,包括速度损失、升沉运动和纵倾角振荡。航速越小,运动变化越大,恢复所需时间越长,控制越困难。  相似文献   

2000 m全液压岩心钻探技术装备示范工程          下载免费PDF全文

张金昌  孙建华  谢文卫  刘凡柏  孟义泉  王庆晓  王年友 《探矿工程》2012,39(3):1-7

介绍了2000m全液压岩心钻探装备示范工程——山东乳山金青顶金矿区ZK43—1钻孔的工程概况、钻探技术装备配置、应用效果和示范工程技术工艺,总结了该示范工程项目工作成果,提出了未来深孔岩心钻探装备研发和推广工作的建议。  相似文献   

2000 m地质岩心钻探关键技术与装备          下载免费PDF全文

张金昌  刘凡柏  冉恒谦  孙建华  孟义泉 《探矿工程》2012,39(1):3-6

经过4年的攻关,国家“863”计划重点项目“2000m地质岩心钻探关键技术与装备”研制取得了多项创新成果,主要包括：完成了地面钻探设备及孔内钻探取心器具集成配套,形成了深部岩心钻探施工和示范能力;完成了山东金青顶矿区危矿专项ZK43—1钻孔施工,终孔深度2212．80m。全孔平均钻进时效为1．65m,岩心采取率为98．6％,钻孔质量优良;创造了3项钻深和套管下入深度全国记录;在大项目运作机制、产学研合作模式及钻探技术示范方式等方面积累了一些经验。详细介绍了项目的研制情况及取得的主要成果。  相似文献   

风动潜孔锤在北京地铁长螺旋旋(定)喷搅拌帷幕桩施工中的应用          下载免费PDF全文

何世鸣  张爱军  裴保国  李德江  张亮  尚瑞 《探矿工程》2012,39(Z1):73-76

本文介绍了长螺旋旋喷搅拌桩在北京地铁明挖车站帷幕施工中的应用情况,在遇到坚硬的地下障碍物时引入了风动潜孔锤形成长螺旋潜孔锤振动旋喷桩,较好地克服了地下障碍,顺利完成帷幕桩施工。为同类情况下施工帷幕桩提供了有益的借鉴。  相似文献