文档介绍：Dynamic characteristics of conveyor belts
HOU You-fu, MENG Qing-rui
School of Mechanical and Electrical Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
Abstract: The dynamic characteristics of a belt conveyor are determined to a large extent by the properties of the belt. This paper describes experiments designed to establish the dynamic properties of belting material. The dynamic elastic modulus, viscous damping and rheological constants of the belt were measured. Several properties were studied as a function of the tensile loading on the belt. These included longitudinal vibration, the natural vibration frequency in the transverse direction and the response to an impulse excitation. Vibration response was observed under several different excitation frequencies. Most of these properties have not been tested previously under conditions appropriate for the ISO/DP9856 standard. Two types of belt were tested, a steel reinforced belt and a fabric reinforced belt. The test equipment was built to provide data appropriate for designing belt conveyors. It was observed that the stress wave propagation speed increased with tensile load and that tensile load was the main factor influencing longitudinal vibrations.
Key words: experimental investigation; dynamic characteristics; conveyor belt
1 Introduction
Belt conveyors are, in most cases, the most cost-effective solution for handling bulk material mass flows over short and medium conveying distances. The belt is a ponent of these conveyors 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 following the ISO/DP9856 standard. Little research on other dynamic parameters has been carried out.
F. Langebrake et al. tested the breaking and splice strength of steel cord belts by using a large ic flux