低压铸造中钢包热—结构耦合分析及优化

Analysis and optimization of ladle thermal structure coupling in low pressure casting

低压铸造钢包作为盛装金属液的压力容器,常用于高温高压的苛刻环境下,为了验证钢包是否满足保温性能及强度条件,对其进行热-结构耦合分析。本文采用ANSYS建立钢包的三维模型,根据实际工况的加载顺序,对钢包温度场与应力场进行分析,并对钢包结构进行优化,结果表明:在合理选择钢包工作层,永久层,绝热层材料及厚度的条件下,钢包外壁温度范围可控制在183℃-245℃之间;最大热应力部位为包壁底端与包盖直径最大处。经过合理强化后,应力分布更加均匀,应力集中明显减小,满足强度条件。

As a pressure vessel containing liquid metal,low pressure casting ladle is often used in the harsh environment of high temperature and high pressure.In order to verify whether the ladle meets the thermal insulation performance and strength requirement,the thermal structure coupling analysis is carried out.In this paper,the 3D model of the ladle is established by ANSYS.According to the loading sequence of the actual working condition,the temperature field and stress field of the ladle are analyzed,and the ladle structure is optimized.The results show that the temperature range of the outer wall of the ladle can be controlled between 183℃-245℃under the condition of reasonable selection of the insulation material and thickness for working layer and permanent layer of the ladle;The maximum thermal stress is at the bottom of the ladle and the largest diameter of the ladle cap.After reasonable strengthening,the stress distribution is more uniform,the stress concentration is obviously reduced,and the strength requirement is satisfied.