Implementation of telemetrie on-line monitoring system of elastic torque of rolling mill line of shafting

摘要

The paper defines the main causes of impermissible dynamic loads in the shaft assemblies of a horizontal plate mill stand. It substantiates the development and commercialization of a stationary telemetry system for continuous control of the torque of the shaft assemblies at the 5,000 mm mill stand at Magnitogorsk Iron and Steel Works, OJSC. The authors determine the main system functions and list requirements to the equipment. They offer hardware for the measuring, transmission and visualization of signals proportional to the torque applied by springs. The peculiarities of the resistance strain gage arrangement and connection are under consideration. The paper describes the equipment designed for wireless power supply to a signal encoder and digital data transfer between a transmitter and receiver. The results of the system commissioning at the 5,000 mm mill are provided as well. The paper presents an example involving the installation of a telemetering ring and gage head for inductive supply and data capture. It shows a system interface view with the representative oscyllographs of torques on the shafts of the upper and lower spindles. This system proves its efficiency. Based on the results of a long-term monitoring, focus areas in the development of algorithms enabling control of the main electric drives are specified; they are aimed at the dynamic torques limiting in the shaft assemblies of the horizontal mill stand.