Online monitoring and combined protection system for reducing and sizing mill

Abstract

The invention discloses an online monitoring and combined protection system for a reducing and sizing mill. The online monitoring and combined protection system for the reducing and sizing mill comprises a vibration online detection and analysis module and a temperature online detection and analysis module. The vibration online detection and analysis module establishes a transmission model according to an equipment input rotating speed and speed-ratio information of all transmission stages of the mill so as to monitor vibration amplitude changes at all frequencies, and the system gives out a stopping command when the vibration amplitude at a certain frequency is abnormal. The temperature online detection and analysis module monitors temperature conditions at all oil film bearing positions,establishes a corresponding associated data model according to data steady-state information of bearings, oil supply, oil return temperature and equipment loads, and gives out a warning and automaticstopping command and displays the high-temperature position when the temperature rise rate is high or exceeds a set value. Data from the vibration online detection and analysis module and data from the temperature online detection and analysis module are processed in combination, and independent or inaccurate temperature or vibration measurement data caused by equipment load changes are filteredout. By adoption of the online monitoring and combined protection system, the accuracy of a system detection alarm signal or a stopping signal given out by the system can be improved.

Description

technical field [0001] The invention relates to the field of operation safety assurance of a reducing and sizing unit in a high-speed wire production line, and in particular relates to an on-line monitoring combined protection system for a reducing and sizing unit. Background technique [0002] The high-speed wire rod production line is famous for its high equipment operation speed and fast output speed of rolled pieces. At present, the domestic high-speed wire rod rolling specifications below Φ6.5 can reach a line speed of 105m / s, and the Φ8 specification can reach 97m / s. The reducing and sizing unit is the production line The core equipment for finished product speed and precision guarantee. According to the theoretical design speed, the roll shaft speed is 11700 / min during the no-load test run, and the output speed of the roll shaft is about 9000 / min during the actual production; the modern high-line production process often uses low-temperature rolling schemes to enhance...

AI Technical Summary

Problems solved by technology

Due to the complex mechanical structure of the equipment, the bearing seat gears are all deep inside the box, and the external transmission of temperature and vibration is not obvious. Due to the high-speed and heavy-load operation characteristics of the reducing and sizing unit, the time between the change of the operating state and the occurrence of failure is relatively short

When there is an abnormality in the manual measurement record, it is often judged by the sound of the equipment combined with experience, whether to shut down for maintenance, which part to check, etc., there is a lot of uncertainty, and there are often situations where the shutdown is not timely for maintenance or the fault judgment is inaccurate

Cause equipment online heavy failure or affect maintenance efficiency

Manual monitoring belongs to offline monitoring and there is discontinuity. When important components such as bearings and gears fail, it will soon cause a major failure of the whole machine. When a major failure occurs, the whole machine can only be replaced, resulting in long production line downtime and seriously affecting production.

And the cost of repairing the whole machine is relatively high. If the damage is serious, the whole machine may be scrapped, which may cause greater economic losses.

Manual monitoring can no longer satisfy the operation guarantee of the reducing and sizing unit, and puts forward new requirements for the monitoring and protection system of the reducing and sizing unit:

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