摘要
为解决工程机械中常出现的过热问题,对某型号装载机在不同工况下各散热器的散热性能,在自行开发的整车散热系统测试平台上进行实验研究.通过对测试数据进行分析,确定了系统过热的原因,即系统中测试获取的冷却风的温度比设计值高,冷却水和传动油的体积流量比设计值小,而且液压油散热器布置位置错误.根据系统过热的原因,调整液压油散热器的位置,并由实验获取的数据对各散热器进行优化设计.改进方案的风洞实验和实车路试结果表明,各散热器的散热量达到设计指标,各系统工作正常.系统测试平台为整车散热系统的性能评价和系统匹配奠定了基础.
To resolve the causes of loader overheat problem, experimental investigation on a loader cooling system was carried out based on a self-developed vehicle thermal management system test bench. Analysis of the test results of the rear-installed cooling system revealed that the overheat problem resulted from the measured cooling air temperature being higher and the coolant flow and transmission oil flow being smaller than the correct design value, and that the wrong location of the hydraulic oil cooler cannot completely meet the need of the cooling system. According to the reason for resulting overheat, the hydraulic oil cooler was changed to the first row and heat exchangers were optimized based on experimental analysis. The optimized heat exchangers module was verified to be good based on wind tunnel test and road test. The results showed that the in-depth research of heat transfer and cooling flow of cooling system based on test bench can be applied to cooling system performance evaluation and vehicle cooling system matching design.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第7期1183-1186,共4页
Journal of Zhejiang University：Engineering Science
关键词
装载机
散热系统
过热
实验研究
改进方案
loader
cooling system
overheat problem
experimental research
solutions
