Study Of 450m~3 Bell-Less-Top Distributor Of Blast Furnace And Finite Element Analysis

Distributor is the key equipment of bell-less top of a blast furnace, which can achieve the form of a variety of fabrics through rotating and tilting the chute, it can make a reasonable distribution of furnace charge in the material surface and make full use of blast furnace gas heat and chemical energy to achieve the purposes of improving the efficiency of blast furnace production. Currently there are many transmission forms of distributor chute, but all exist deficiency like complex transmission. This paper designs a new type of distributor, simplifies the drive system of the distributor and improves the sealing performance, making it more convenient in manufacture and maintenance and work more reliably. And doing the finite element calculation to the key components of the distributor calculations by the finite element software ANSYS, which makes the force of the main components more directly, in order to raise enough theory reference for the subsequent design.The design uses two drive systems to achieve the rotary and tilting mechanism of the chute. The rotary chute completes the transfer through the motor, deceleration devices, a rotating cylinder driven by gear mechanism. chute tilting can be achieved by the motor, the upper and lower of bracket ring connected completed by crank's motion driven by deceleration devices, the rotation of ear axis propping by the lower and upper o bracket ring. It simplifies the transmission device and structure of the distributor greatly. It uses three-dimensional software Pro/e to create the main transmission parts of distributor, establish virtual assembly model of distributor, and make the theoretical analysis of the movement of the distributor.Using finite element analysis software ANSYS, distributor of the key parts: gear, ear shaft, chute and rotating cylinder have been carried out static analysis; etting the stress and deformation distribution of various parts; through the modal analysis of small gears, we find before the 10-order natural frequencies and mode shapes of the gear; based on the temperature field analysis of the rotating cylinder , we analyses the stress distribution of the rotating cylinder under the combined effect of mechanical load and temperature load. The results show that: mechanical stress, deformation, temperature distribution, thermal stresses of the distributor's key parts are within the scope of permission; small gear dynamic characteristics meet the requirements and the structure does not appear resonance; it explains the rationality of the design.