In high-speed aluminum rolling process, due to ambient temperature changes and the rolling passes, NM500 wear plate rolling oil temperature is to change, because the oil tank is generally heated to above the rolling oil temperature, in order to meet the requirements of the production process, the cooling, the injection system, temperature control system added to control the temperature.
The system mainly consists cooler, thermostat, thermal resistance valve, electric valve positioner and other components. NM500 wear plate I rolled to reduce oil through oil cooler, which reduces the amplitude of the control valve 5 to adjust the flow of cooling water.
The temperature regulator 2 to the set oil temperature into electrical signals, with the thermal resistor 3 for detecting the signal comparison, NM500 wear plate rolled electrical output signal to the positioner telegraph signal converter A, and transformed into dead electromagnetic force, the nozzle plate B is moved, changing the back pressure of the nozzle C, D the following output pressure actuator changes the air pressure of the control valve 5, the opening degree of the control valve is changed (i.e. to achieve cooling water flow rate Q 'changes), and to swing the lever E, G when the feedback spring reaction force and the electromagnetic force generated when the corpse equilibrium, regulating valve opening does not change, thus achieving control of the cooling water flow rate p, the oil temperature at the set value.