Simulation And Optimization Design Of Thermal Field Behind Forklift Radiator

The cooling effect is directly related to the normally work of the forklift truck and the service life of the engine,so the cooling system of the forklift truck with high temperature phenomenon,the numerical simulation of cooling system and efficient heat dissipation optimization analysis plays an important role in the reasonable design and improvement of the whole forklift truck.ANSYS/CFX is used in this paper on forklift truck cooling simulation calculation,the temperature distribution of the forklift truck counterweight rear was obtained,and compared with the test results.The rationality of numerical simulation model was verified.Based on this,heat dissipation optimization analysis on the counterweight hole and related pipeline forklift truck position were developed,in order to improve the cooling effect of forklift truck,and provide technical support for reasonable design and improvement of the forklift truck.The specific work is as follows.First of all,the basic principle on heat dissipation of cooling system and heat-flow coupling of numerical simulation involved in this paper were combed.The relevant research progress about the numerical simulation on heat-flow coupling of forklift cooling system were investigated extensively at home and abroad.The software ANSYS/CFX with numerical calculation method of the heat-flow coupling was studied,the basic calculation principle and skilled in the use of this software were understood.Secondly,for the cooling system of a certain 3D numerical model of forklift truck,including the rear frame of the forklift truck,the counterweight and the heat sink,etc.The finite element mesh generation is carried out,including solid mesh division and fluid meshestablishment.The relevant official published references are searched,and the thermodynamic performance parameters of related materials and structures,and the heat transfer coefficient between air and vehicle frame,air and radiator are obtained.A finite element numerical model for the analysis of the temperature field in the rear of the cooling system is established and calculated and solved,and the distribution of the heat field behind the cooling system is obtained.Then,the optimal model is determined,the optimization variables and objective variables are defined.The rear frame and counterweight structure geometry are changed to study its effect on the flow of the heat distribution,until a geometric layout are found that the thermal field distribution inside the forklift truck is weak and strong thermal field distributed outside the forklift truck.At the same time,the location of the catalyst and muffler components that obstruct the heat flow in the forklift truck are changed in order to study the influence of position change on the heat flux distribution,and improve the heat dissipation effect of the forklift truck.Finally,according to the cooling optimization simulation results,modify the counterweight hole frame geometry and internal pipeline position,and consider the actual installation and function.Suggestions and schemes to improve the cooling effect are approved,for referenced in the actual machining.