Investigation of Stress-Strain State of Ball Mill Trunnion

The article discusses the trunnion of a ball mill in the framework of the theory of elasticity, which is subjected to uneven thermal effects due to the heating load. Long-term operation of the mills leads to a significant wear of mainly mechanical parts of the supporting rotating parts—pins. There are various defects on the working surface of the trunnion, which, under the action of dynamic loads, contributes to the loss of working capacity and long downtime during repair. The study of the stress-strain state will determine the parameters for restoring the cylindrical surface of the trunnion. The equations describing the radial displacement of a point inside the trunnion of a ball mill are obtained. The equations describing the movement of the trunnion points of the ball mill are derived. The stress-strain state of the trunnion of the ball mill was determined depending on the temperature of the inner and outer surfaces of the trunnion. Deformations and stresses arising on the surface of a pin are investigated by numerical methods.