基于温度效应的带式输送机压陷滚动阻力研究

摘要

In order to reduce the energy consumption and operation cost, and achieve optimal performance and efficiency, firstly, DMA experimental data of rubber is used to simulate the viscoelasitc properties of modulus function with the temperature changes, then the function is imported into the three-parameter Maxwell model, then the mathematical models based on temperature effect is established. Secondly, to facilitate the solution, available approaches to determine the temperature function of Maxwell model and the contact length a and b between cover and rollers are given. Finally, numerical simulations are carried out to study the indentation rolling resistance characteristics under various temperature and belt speed. Research has clearly demonstrated that in -20℃ to 60℃ temperature range, indentation rolling resistance increases with the increase of temperature, and at certain temperature, indentation rolling resistance increases with the increase of belt speed.%为了减少带式输送机的能耗损失及运行成本，获得最佳的性能及效率，首先利用橡胶的DMA实验数据拟合粘弹特性模量随温度变化的数学函数，将其导入三元件Maxwell模型，建立了基于温度效应的压陷滚动阻力数学模型；然后给出了Maxwell模型中温度函数的确定方法和覆盖层与托辊接触长度a和b的确定方法；最后采用MATLAB数值模拟的方法，研究了不同温度和不同带速下的压陷滚动阻力特性。研究表明，在－20℃到60℃的温度范围内，压陷滚动阻力随温度的增大而增大，在某一温度下，压陷滚动阻力随着带速增大而增大。