Research On Design Of Intelligent Rolling Bearing For Strip Mill Based On Temperature Monitoring

The rolling mill bearing is the core part of the rolling mill rotary support unit.The failure and damage of rolling mill bearing under unstable conditions often occur because of high temperatures.Rolling mill-bearing temperature monitoring is difficult,and some even do not provide test points.At the same time,the internal temperature distribution of rolling mill four-row roller bearings is not clear,so there is no effective temperature test scheme for rolling mill bearings.This paper reveals the internal temperature distribution law of rolling mill four-row roller bearings and designs the intelligent bearing temperature monitoring slotting scheme,which has a certain guiding significance for the monitoring and diagnosis of rolling mill bearings.In this paper,the mechanism model of a rolling mill four-row roller bearing is established by the slicing method,and then the mechanical model of a rolling mill four-row roller bearing is established by the Newton-Raphson method and finite element method.The non-uniform bearing load phenomenon of the rolling mill support roller was revealed through the mechanism and mechanical model,and the deformation and stress distribution of each row of four-row roller bearing were analyzed when the support roller was loaded,which provided the theoretical basis for the establishment of a temperature field model of four-row roller bearing and the slotted design of bearing seat.Based on the mechanical model of four-row roller bearings in a rolling mill,the temperature calculation model of four-row roller bearings is established.The temperature field of the four-row roller bearings in the rolling mill was calculated using Matlab for preprocessing and the finite element method.This model analyzes the temperature distribution of four rows of bearings,reveals the non-uniformity of the four rows of bearings under the condition of non-uniform load,and further analyzes the temperature variation trend of four rows of rolling mill bearings under different load and speed conditions.Subsequently,the deformation and stress changes of the bearing and bearing seat when the bearing seat is slotted in the circumferential and axial directions are analyzed.The mechanical properties of bearings with different grooving sizes are discussed,the calculation results under different grooving conditions are compared,and the life changes of bearings before and after grooving are calculated.Finally,the temperature calculation model’s accuracy is verified by the temperature distribution experiment on the rolling mill test stand.The experimental results show that the temperature distribution of the bearing test is not much different from the calculation model of the bearing temperature field,which has a good forecasting function.At the same time,it is also proved that the sensor is feasible to monitor the temperature inside the bearing seat.