大型矿用采掘设备水冷型变频器系统设计及高效冷却关键技术研究OA

In response to issues such as low heat dissipation efficiency and excessive temperature rise of components that compromise reliability in large mining frequency conversion cabinets under heavy-duty conditions,taking frequency conversion cabinets for mining excavation equipment as the object,associated efficient cooling technologies were studied.Based on thermal characteristics of core heat-generating components in frequency conversion cabinets,a composite cooling scheme was proposed,employing water cooling as the primary method supplemented by air cooling.The flow channel structure,piping layout,and heat dissipation unit configuration of the water cooling system were optimized,and a cooling system simulation model was established and validated.Results demonstrate that this cooling scheme can limit the maximum temperature rise of power modules within the cabinet to 24.1℃,maintain the average air temperature inside the cabinet below 60℃,and ensure that hot spot temperatures of key components satisfy tolerance requirements.This research provides technical support for the efficient thermal design of high-power mining frequency conversion cabinets and offers significant reference value for advancing the localization of cooling technologies for heavy-duty equipment.