轮式装载机冷却组优化匹配的风洞试验

Wind Tunnel Test of Optimization and Matching on the Cooling Package Performance of a Wheel Loader

轮式装载机中．由中冷器、液压油冷却器、水散热器和变矩器油冷器构成的冷却组，分成3排布置在装载机尾部。风洞试验研究发现，在冷却空气风速1．8～7．5m／s范围内，随着冷却组排间间距从10mm增大到200mm，冷却组换热能力提高5．1％～8．3％，压降降低11.2%-20．5％；变矩器油流向改变后，在冷却空气风速1．8～6.5m／s范围内，冷却组换热能力提高0．1％～6．2％。因此在空间允许的前提下，适当增大冷却组换热单元的间距，合理调整热侧介质流向，可以提高冷却组的散热能力。

In a wheel loader, the charge air cooler（CAC）, the hydraulic oil cooler（HOC）, the radiator and the torque converter oil cooler（TCOC） are assembled together to form a cooling package, which is separated into 3 rows and arranged in the back end of the loader. With the increase of spacing between rows from 10 mm to 200 mm, when the cooling air speed is between 1.8 7.5 m/s, the heat exchange capability of the package rises by 5.1% - 8.3% and the pressure drop reduces by 11.2%-20. 5%, With the oil flow direction of the TCOC changed, when the cooling air speed is between 1.8 - 6.5 m/s, the heat exchange ability of the whole cooling package rises by 0. 1%-6.2%. Enlarge the row spacing to a reasonable extent, can improve the performance of the cooling package and help to save the energy.