The Mechanics Analysis And Structural Design Of Vacuum Heating Furnace

Vacuum heating furnace is heating equipment which is widely used in the oil and gas gathering and transportation process. In the process, it plays an important role. But in the design of the vacuum heating furnace, in order to improve the heating furnace to resist external pressure instability caused by damage, a certain number of reinforcement is often arranged in the design of head. Whether the reinforcement design is reasonable or not, not only relates to the safe operation of heating furnace, also directly affect the production cost, increase the cost of transportation and installation. Therefore, mechanics analysis and structure optimization design in the vacuum furnace has the important value of engineering application.According to the vacuum furnace main bearing components of the mechanical analysis and the condition of strength and buckling critical external pressure, Determining the geometric and material parameters main components, it finish the structure design of a vacuum heating furnace. Considering the structure and working condition of vacuum furnace, Using the hybrid element, it established the finite element model of the whole vacuum furnace. Using the solid element, establishing a local finite element model of the head. Through the analysis of the stability of the heating furnace, The finite element method result of critical buckling pressure is 0.33MPa, slightly lower than the calculation formula of the 0.387MPa, it all greater than maximum 0.1 MPa of the stop condition under external pressure, The design of the heating furnace can not external pressure instability. By finite element analysis under stop condition, water pressure test and the operating state of heating furnace, it is concluded that the vacuum furnace stress distribution on the cylinder is small and stress distribution of the head is bigger. The maximum equivalent stress in the working condition of hydraulic pressure is 380.79 MPa and the operation condition is 363.62 MPa, The stress linearization and the classification evaluation meet the strength condition. The heating furnace strength damage will not occur. Through to the after head stiffener possible design scheme is analyzed with mechanics, and compared with the calculation results, under the premise that ensure the safety of the same, after head stiffener spacing design is the most reasonable. Each furnace can reduce material directly 36 kg. Manufacturing costs of the vacuum furnace reduces. This provides a theoretical basis for optimize the design of the heating furnace and safety assessment r.