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为了改善装载机动力舱热环境,提高散热器的换热性能,保证整车工作的稳定性,以轮式装载机为研究对象,按照实际尺寸建立三维计算模型,采用虚拟风洞和数值模拟相结合的研究方法,预测排气系统对动力舱热环境和散热器性能的影响,并比较了在两种排气系统结构下散热器的换热效率。仿真结果与试验结果比较吻合,证明了计算模型的有效性。计算结果表明:采用隔热排气系统能够明显降低动力舱内空气的温度,改善舱内热环境,液压油散热器换热性能提高9.0%,水散热器换热性能提高7.3%,传动油散热器换热性能提高6.8%。研究结果对装载机整车热管理技术提供了指导。
In order to improve the thermal environment of the loader power cabin, improve the heat transfer performance of the radiator and ensure the stability of the vehicle work, the wheel loader is taken as the research object, the three-dimensional calculation model is established according to the actual size, the virtual wind tunnel and the numerical simulation phase Combining the research methods, the influence of the exhaust system on the thermal environment and the performance of the radiator is predicted, and the heat transfer efficiency of the radiator under two exhaust system configurations is compared. The simulation results are in good agreement with the experimental results, which proves the effectiveness of the computational model. The calculation results show that the adiabatic exhaust system can significantly reduce the temperature of the air in the power cabin and improve the thermal environment in the cabin. The heat transfer performance of the hydraulic oil radiator is increased by 9.0%, the heat transfer performance of the water radiator is increased by 7.3%, and the transmission oil radiator Heat transfer performance increased by 6.8%. The research results provide guidance for the thermal management technology of loader vehicle.