Innovatively addressing the challenge of difficult winter starts for vehicles in northern regions,this study has developed a Thermally Controlled Preheating Engine Activation System.This system ingeniously integrates ...Innovatively addressing the challenge of difficult winter starts for vehicles in northern regions,this study has developed a Thermally Controlled Preheating Engine Activation System.This system ingeniously integrates a thermal insulation kettle,an efficient water pump,precision valves,and temperature sensors,all closely linked with the engine’s coolant circulation system.In cold environments,the system automatically initiates a preheating mechanism by circulating and heating the coolant,significantly enhancing engine startup efficiency and reducing wear caused by cold starts.The anticipated outcome of this research is to substantially improve the operational reliability of vehicles in cold climates,extend their lifespan,promote energy conservation and emissions reduction,and drive the automotive industry towards greener,more efficient,and intelligent technologies,thus laying a solid foundation for industry upgrades and transformation.展开更多
针对目前水下局部干法焊接接头淬硬组织多、硬度偏高等问题,本文研究了水下局部干法焊接预热以及后热缓冷的方法,并且针对于各种方法进行了预热温度的计算机仿真模拟。结果表明:电磁感应预热与电弧预热是水下局部干法焊接可以选择的预...针对目前水下局部干法焊接接头淬硬组织多、硬度偏高等问题,本文研究了水下局部干法焊接预热以及后热缓冷的方法,并且针对于各种方法进行了预热温度的计算机仿真模拟。结果表明:电磁感应预热与电弧预热是水下局部干法焊接可以选择的预热方法。Ansys模拟结果表明:在最苛刻的冷却条件下(被焊管道外壁没有任何保温层,且管道内部为水),对于电磁感应预热来说,加热功率为10 k W时,预热温度可以达到89.9℃,完全满足我们的预热要求。并且在工件外表面加一层保温层对减缓焊接热量流失的效果是很好的。对于电弧预热来说,电弧燃烧4 min可以使预热温度达到60℃左右,加保温层后可以达到70℃左右。完全可以将排水罩内的环境烘干,并且将焊枪头部的水烘干。而针对于水下用中频高压电带来的安全问题,本文提出了一种"人电分离"的电磁感应预热模式,后续可以深入研究。展开更多
文摘Innovatively addressing the challenge of difficult winter starts for vehicles in northern regions,this study has developed a Thermally Controlled Preheating Engine Activation System.This system ingeniously integrates a thermal insulation kettle,an efficient water pump,precision valves,and temperature sensors,all closely linked with the engine’s coolant circulation system.In cold environments,the system automatically initiates a preheating mechanism by circulating and heating the coolant,significantly enhancing engine startup efficiency and reducing wear caused by cold starts.The anticipated outcome of this research is to substantially improve the operational reliability of vehicles in cold climates,extend their lifespan,promote energy conservation and emissions reduction,and drive the automotive industry towards greener,more efficient,and intelligent technologies,thus laying a solid foundation for industry upgrades and transformation.
文摘针对目前水下局部干法焊接接头淬硬组织多、硬度偏高等问题,本文研究了水下局部干法焊接预热以及后热缓冷的方法,并且针对于各种方法进行了预热温度的计算机仿真模拟。结果表明:电磁感应预热与电弧预热是水下局部干法焊接可以选择的预热方法。Ansys模拟结果表明:在最苛刻的冷却条件下(被焊管道外壁没有任何保温层,且管道内部为水),对于电磁感应预热来说,加热功率为10 k W时,预热温度可以达到89.9℃,完全满足我们的预热要求。并且在工件外表面加一层保温层对减缓焊接热量流失的效果是很好的。对于电弧预热来说,电弧燃烧4 min可以使预热温度达到60℃左右,加保温层后可以达到70℃左右。完全可以将排水罩内的环境烘干,并且将焊枪头部的水烘干。而针对于水下用中频高压电带来的安全问题,本文提出了一种"人电分离"的电磁感应预热模式,后续可以深入研究。
