摘要
Abstract
In view of the high-temperature working conditions of hot-formed steel ingots with a grabbing temperature of about 650℃,the maximum oil temperature of the hydraulic system can reach 100℃,as a result,the viscosity of the lubricating oil decreases,the wear of hydraulic parts increases,the grab operation becomes stuck,the seals and pipelines age,and the life of the hydraulic system of the whole machine cannot be guaranteed,by analyzing the heat source of the hydraulic system of the steel gripper,an AMESim heat transfer model is built,it is found that the heat exchange of the oil inside the actuator close to the steel ingot is insufficient,and the hot oil can not be taken away in time and overheated.To this end,a circulating flushing cooling system is added between the actuator and the main valve close to the actuator,in order to increase the flow of heat exchange hydraulic oil in the grab cylinder,grab rotation motor and nearby pipelines,the hydraulic pipeline can mix hot and cold hydraulic oil during the steel ingot grabbing stroke and return stroke to reduce the oil temperature and make the rotary oil line oil.The temperature is maintained within the normal operating range.The AMESim hydraulic system thermodynamic model simulation and experimental tests show that,the optimized circulating flushing cooling system can control the hydraulic oil temperature of the hydraulic system between 55～80℃,it verifies the effectiveness of the circulating flushing cooling system in controlling oil temperature,improves the working reliability of the hydraulic system,and provides a reference for the design of hydraulic cooling systems under similar high-temperature conditions.关键词
液压抓钢机/热成型钢锭/热传导/热辐射/循环冲洗Key words
hydraulic steel grabber/hot formed steel ingot/heat conduction/thermal radiation/circular flushing分类
信息技术与安全科学
