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Dynamic+characteristics+of+conveyor+belts.pdf

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Dynamiccharacteristicsofconveyorbelts

Available online at www．sciencedirect．OOm ·一一， ’·：，ScienceDirect J China Univ Minmg＆Teehnol 18(2008)0629--0633 JOURNAL OF CHINA UNIVERSITY OF MINING TECHNOLOGY ■●●■●iiiiii；iiii■●■■■i■|■■●■一 WWW．elsevier．com／locate／jcumt Dynamic characteristics of conveyor belts HOU You-fu，MENG Qing—rui School ofMechanical and Electrical Engineering，China University ofMining＆Technology，Xuzhou，Jiangsu 221116。China Abstract：The dynamic characteristics of a beIt conveyor are determined to a large extent by the properties of the beIt．This paper describes experiments designed to establish the dynamic properties of beIting material．The dynamic elastic modulus，viscous damping and theological constants of the belt were measured．Several properties were studied as a function of the tensile 10ading on the beIt．These included longitudinal vibration．the natural vibration frequency iB the transverse direction and the response to an impulse excitation．Vibration response was observed under severaJ different excitation frequencies．Most of these properties have not been tested previously under conditions appropriate for the ISO，DP9856 standard．～o types of belt were tested．a steeI rein． forced belt and a fabric reinforced belt．The test equipment was built to provide data appropriate for designing belt conveyors．It was observed tIlat the stress wave propagation speed increased with tensile Ioad and that tensile load was the main factor influen． cing longitudinal vibrations． Key words：experimentai investigation；dynamic characteristics；conveyor belt 1 Introduction Belt conveyors are，in cost—effective solution for most cases，the most handling bulk material mass flows over short and medium conveying dis— tances．The belt is a key component of these con． veyors and its dynamic characteristics determine the working performance to a great extent．At present， experimental research on the dynamic characteristics of conveyor belts is mainly concentrated on testing dynamic elastic modulus and viscous damping fol— lo