农业机械学报2017，Vol.48Issue(10)：84-91,8.DOI:10.6041/j.issn.1000-1298.2017.10.010
打结器连续打结试验方法与疲劳试验台设计
Continuous Knot-tying Test Method of Knotter and Knotter Fatigue Test Bench Design
摘要
Abstract
In view of lack of continuous knot-tying performance test and fatigue test system of knotter in China,a kind of continuous knot-tying test method of knotter and design scheme of knotter fatigue test bench were proposed to simulate straw-bundling processes of square baler.By designing a rope-pulling device which can simulate springback characteristic of straw bale,the device moved on horizontal plane to pull rope according to rectangle path,and a rectangle rope ring was formed on vertical plane in cooperation with rope-sending motion of rope needle,and the tested knotter finished knot-tying.The test bench realized rope-pulling,rope-sending and knot-tying motion circularly,and tension force of the rope,torque and rotation angle of the main shaft can be measured at the same time.3D model of mechanical system of the test bench was established under the software of Solidworks according to the proposed scheme,and type selection of its key parts was done.Parameters measurement and motion control system of the test bench was built up,and control flow of the test bench was designed on the basis of the logic among rope-pulling,rope-sending and knot-tying motion.Graphical programming language of LabVIEW was used to program the measurement and control program of the test bench.The running test results of knotter fatigue test bench showed that the mechanical system,measurement and control system of the test bench worked reliably,and continuous knot-tying efficiency of the test bench reached three knots per minute.The test bench may provide a test platform for knotter development and short-term fatigue life evaluation of knotter.关键词
打捆机/打结器/试验台/控制/疲劳试验Key words
baler/knotter/test bench/control/fatigue test分类
农业科技引用本文复制引用
尹建军,王新新,高强..打结器连续打结试验方法与疲劳试验台设计[J].农业机械学报,2017,48(10):84-91,8.基金项目
国家自然科学基金项目(51375215)、国家重点研发计划项目(2016YFD0701700)和江苏高校优势学科建设工程项目(苏政办发[2014]37号) （51375215）
