活塞冲击端面积和钎杆端部的面积接近或者相等.doc

活塞冲击端面积和钎杆端部的面积接近或者相等 　　长期以来，在采矿工业、煤炭工业、铁道工程、军事工程等发挥着重要作用的液压冲击机械一直是人们研究的重点，随着我国科学技术的长足发展，液压冲击机械的研究运用更是取得了突破性的进展。 For a long time, in the mining industry, coal industry, railway engineering, military engineering and other plays an important role in hydraulic impact machine has been the focus in the study of people, with the rapid development of Chinas science and technology, the hydraulic impact machine research has made breakthrough progress. 1、 新型液压冲击机械设计理论 1, the new hydraulic impact machine design theory 液压冲击机械以液体作为工作介质，把压力转换为动能，通过往复运动冲击钎杆传递能量，它的输入参数是系统的流量和工作压力，输出参数是冲击频率和冲击能。新型的液压冲击机械内核仍然是冲击器，并且不同类型的液压冲击机械内核相同，即冲击器的工作原理和机构基本相同。 Hydraulic impact machine as a liquid as working medium, the pressure is converted to kinetic energy, through the reciprocating motion energy impact drill rod and of its input parameters are system work flow and pressure, the output parameter is the impact frequency and impact energy. New type of hydraulic impact machine core is still a knocker, and different types of hydraulic impact machine the same kernel, namely the principle of shock and mechanism are basically the same. 　　根据我国液压技术发展水平和机械制造水平，目前，冲击器有两种常见类型：单面回油前腔常压型和双面回油型。两种类型有各自的优缺点，如下： According to the development level and the level of mechanical manufacture, hydraulic technology in China at present, is there are two common types: single oil return cavity before atmospheric pressure type and double oil return type. Two types have their own advantages and disadvantages, as follows: 　　单面前腔常压型冲击器的优点有：结构简单、制造成本低、工艺性好、回程制动阶段无吸空现象，缺点有：排油时间短、回油管峰值流量大、活塞形状不如双面回油型的好、回油阻力大、压力波动大等。 Single front cavity type atmospheric impact device has the advantages of: simple structure, low manufacturing cost, good in usability, return braking phase without absorbing empty phenomenon, shortcomings are: oil discharge time is short, big return hose peak flow, piston is not as good as double back to the oil type, oil resistance, pressure fluctuation, etc. 　　双面回油型冲击器优点有：活塞形状合理，有较好的破岩效果，还可提高钎具和活塞的寿命；回油管峰值流量少