履带式森林灭火炮转向性能分析与验证  

Analysis and Verification of Steering Performance of Crawler Forest Fire Cannon

作　　者：刘九庆[1] 姚凯 LIU Jiuqing;YAO Kai(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学机电工程学院,哈尔滨150040

出　　处：《森林工程》2021年第3期95-102,共8页Forest Engineering

基　　金：黑龙江省自然科学基金项目(TD2020C001)。

摘　　要：建立履带底盘式森林灭火炮的转向分析模型时,因忽略质心偏移和离心力所产生的问题,会导致不能更真实地体现森林灭火炮转向运动的状态。为此本文基于履带转向原理和转向动力学,对森林灭火炮的履带底盘做动力学分析和静力学分析,建立更为准确的森林灭火炮转向性能数学模型,在建立模型时考虑了转向阻力矩、土壤下陷阻力和履带接地面压力分布情况等参数。选取实际车辆为例,用所建立模型计算各项参数,并与试验结果作对比。结果表明:履带车体因离心力产生的质心偏移量越大,履带转弯半径也越大。森林灭火炮转向性能受离心力影响较大,履带对地面的压力并不是均布在履带接地表面上。试验表明模型分析的结果与实际情况的误差在可接受范围内,证明了模型的准确性。When establishing the steering analysis model of crawler bottom-plate forest fire extinguishing cannon,the ignoring of the problems caused by the offset of the center of mass and the centrifugal force will lead to the failure to more truly reflect the state of the steering moment of the forest fire extinguishing cannon.For this reason,based on the principle of track steering and steering dynamics,this paper makes dynamic analysis and statics analysis of the crawler chassis of forest fire extinguishing cannon,and establishes a more accurate mathematical model of forest fire extinguishing cannon to performance when the model takes into account the steering resistance moment,soil subsidence resistance,track parameters such as ground pressure distribution.Taking a real vehicle as an example,the parameters are calculated by the model and compared with the test results.The results show that the larger the centroid offset caused by centrifugal force is,the larger the turning radius of the track is.The steering performance of forest fire extinguishing cannon is greatly affected by the centrifugal force,the pressure from the track to the ground is not uniformly distributed on the ground surface of the track.The experiment also shows that the error between the results of model analysis and the actual situation is within the acceptable range,which proves the accuracy of the model.

关 键 词：履带底盘 转向过程 离心力 阻力矩 转向理论 

分 类 号：S776[农业科学—森林工程] TH113.2[农业科学—林学]