针对气垫传动冲击锤钻在传统设计中需进行繁杂试制与实验弱点，提出基于数值模拟的研究方法，以样机测试活塞运动特性曲线为基础，对所建仿真模型进行细化及修正。通过模拟实际工况各种复杂影响因素，实现对锤钻冲击特性快速分析。对影响冲击活塞冲击动力参数输出的关键因素如O型密封圈摩擦力及补气孔孔径进行分析、优化，获得摩擦阻力变化对撞击能影响曲线及补气孔径最优参数范围。该模型及优化结果为此类产品快速设计与性能分析提供新的数值研究方法，对相同结构系统具有实用参考价值。
Abstract
Complex trail manufactures and experiments are conducted in the process of traditional design and development for pneumatic impact hammer. Aiming at these weaknesses, a method based on numerical simulation was proposed in the research. Meanwhile, the simulation model was refined and modified on the base of kinematical characteristic curve of prototype testing pistons. The impact characteristic analysis of electric hammer was carried out rapidly by simulating various complex factors in actual working conditions. The critical factors, affecting dynamic parameters’ outputs of the impact piston, such as O-ring friction force and the diameter of supplement gas hole, were analyzed and optimized in the study. And the influence curve on the friction resistance variation to impact energy and the scope of optimum parameters for the supplement gas hole diameter were achieved. The simulation model and optimized results provide a new numerical method for the rapid design and performance analysis of this kind of products. The results have practical reference value to the same structure system.
关键词
气动冲击锤 /
模型 /
摩擦 /
泄漏
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Key words
pneumatic impact hammer /
model /
friction /
leakage
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参考文献
[1] 许勤.流体冲击机械的现状与发展趋势[J].工程机械,2011(3): 54-60.
XU Qin. Present Situation and developing trend of fluid impact machinery[J]. Construction Machinery and Equipment, 2011(3):54-60.
[2] 马晓娟.电锤及其压缩真空式冲击机构[J].电动工具,1999(2): 22-23.
MA Xiao-juan. Electric hammer and its compressed vacuum type impact mechanism [J]. Electric Tool,1999(2):22-23.
[3] 王忠发.压气活塞式冲击机构仿真计算[J].凿岩机械气动工具,1994(2):2-4.
WANG Zhong-fa. Simulation calculation of air cushion piston impact mechanism[J]. Drilling Machines and Pneumatic Tools,1994(2):2-4.
[4] 张志兵.气动冲击锤的计算机模拟研究[D].长沙：中南大学，2001:12-13.
[5] 吴恺民,王家驹.电锤冲击机构参数对冲击功和钻孔效率的影响[J].电动工具,2000(2):11-15.
WU Kai-min, WANG Jia-ju. The effect of electric hammer‘s impact mechanism parameters on the efficiency of impact energy and drilling [J]. Electric Tool,2000(2):11-15.
[6] 付永领,齐海涛. LMS image.lab AMESim系统建模和仿真实例教程[M].北京：北京航空航天大学出版社，2011.
[7] 丁问司,熊江.电驱冲击气锤冲击特性建模与仿真研究[J]. 振动与冲击,2012,31(19):31-35.
DING Wen-si, XIONG Jiang. Modeling and simulation for shock characteristic of an electrically driven shock pneumatic hammer[J].Journal of Vibration and Shock,2012,31(19):31- 35.
[8] 赵飞.基于AMESim的气动系统建模与仿真技术研究[D].秦皇岛：燕山大学，2010:7-8.
[9] 左孝桐，张家犀.机械密封O型辅助密封圈摩擦力的研究[J].流体工程,1989,18(4):1-8.
ZUO Xiao-tong, ZHANG Jia-xi. Study on the friction force of assisted mechanical seal O ring[J]. Fluid Engineering, 1989, 18(4):1-8.
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