The research on the buckling analysis of cast iron gate screw rods in the industry is largely unexplored. Therefore, this author, combining engineering examples, conducts a buckling analysis of the screw rods using ANSYS. This not only verifies whether the screw rods meet the practical engineering requirements but also studies the impact of the structural dimensions of the screw rods on the critical buckling load.
The screw rod of cast iron gate valves is a slender rod. Factors such as a small screw rod diameter, high closing force of the gate, and large spacing of the screw rod supports can all lead to the loss of stability of the screw rod due to bending. Therefore, in certain situations, it is necessary to perform a stability calculation on the screw rod of cast iron gate valves, i.e., a buckling analysis.
In addition, the change规律 of the critical bending load and displacement with the bending mode number has been determined. The comparison of the influence of nominal diameter and support length on the critical bending load reveals that the critical bending load is more sensitive to changes in the nominal diameter. The bending analysis of the screw rod ignores the characteristic values of the bending due to initial defects of the screw rod, and can only reflect the bending characteristics of the screw rod in an ideal state. It does not reflect the actual bending characteristics of the screw rod under real conditions.