消防机器人热防护材料隔热性能数值模拟

Numerical simulation of the heat-insulation performance of thermal protection material for firefighting robot

随着智慧城市建设进程的不断加快,消防设备智能化、自动化趋势愈发明显,消防现场机器人的需求也越来越大。消防机器人的热防护能力是保障其在救援现场发挥作用的核心问题。基于热障涂层材料和隔热保温材料的基本属性及火灾现场环境,建立以多种热障涂层材料和隔热保温材料为主体的消防机器人热防护系统,通过传热模拟量化分析了热障涂层材料、隔热保温材料和热障涂层厚度对热防护能力的影响。结果表明:隔热保温材料的热防护性能从高到低为陶瓷纤维毡、陶瓷纤维纸、莫来石陶瓷、玻璃纤维、岩棉、气凝胶和矿渣棉;热障涂层材料的热防护性能从高到低为MgO、含钇气凝胶、石墨、SiO_(2)、Si_(3)N_(4)、MgZrO_(3)、Al_(2)O_(3)、NiCrAl和ZrO_(2);当隔热保温材料为玻璃纤维、热障涂层材料为Si_(3)N_(4)时,5 mm为热障涂层的最佳厚度。

To improve the thermal insulation performances of the firefighting robot,and protect the personal and property safety,the important factors affecting the thermal protective performance of the firefighting robot are numerically simulated.The aim is to obtain the optimal combination of the protective material and thermal barrier coating thickness.First,the thermal protective structure of the firefighting robot is designed based on the basic properties of the thermal barrier coating materials and thermal insulation materials,combined with the fire scene environment.Then,the control variable method is used to design the simulation scheme with the thermal barrier coating material,thermal insulation material,and thermal barrier coating thickness as variables respectively.And the materials with stable performances in the simulation are used as the invariants in each simulation,which can make the simulation results more accurate and effective.Finally,the thermal protective properties of the thermal insulation materials and the thermal protective properties of thermal barrier coating materials are arranged from high to low.Besides,we find out that 5mm is the best thickness of the thermal barrier coating under the same conditions as the other simulation parameters.According to the properties and numerical relationships of the influencing factors,the influences of the material properties on thermal insulation effects are obtained.And the thermal insulation effects of the thermal insulation materials are inversely proportional to the thermal conductivity of the material properties.The thermal insulation effects of two kinds of thermal insulation materials with the same composition are inversely proportional to the density.In addition,compared with other basic properties of the materials,the specific heat capacity has a great influence on the thermal insulation effect of the thermal barrier coating.According to the characteristics of different influencing factors,the thermal protective performances of the firefighting robot can be improved effectively.The research results have an important reference value for the design of the thermal protective system of the firefighting robot,and the thermal protective system model can work as a reference for similar system designs of the thermodynamic model.