APPARATUS, ROLLING INSTALLATION AND METHOD FOR CONTROLLING A STRIP TENSION DURING THE FLEXIBLE ROLLING OF METAL STRIP

摘要

Apparatus for controlling a strip tension during the flexible rolling of metal strip, wherein the device comprises the following: a roll arrangement (11, 17) with at least one dancer roll (12, 18), the position of which is adjustable for controlling the strip tension of the metal strip (8), at least one hydraulic drive (22), which is coupled to the dancer roll (12, 18) for adjusting the same, a hydraulic tank (27) for hydraulic fluid, which is connected to the hydraulic drive in a fluid-conducting manner by way of a hydraulic feed line (38), a controllable valve arrangement (29) between the hydraulic tank (27) and the hydraulic drive (22) for controlling the hydraulic drive (22), a hydraulic pump (28), with which the hydraulic drive (22) is supplied with hydraulic fluid from the hydraulic tank (27), and at least one hydraulic pressure accumulator (33) for buffer-storing hydraulic fluid delivered in advance by the hydraulic pump (28), wherein the hydraulic pressure accumulator (33) is arranged between the hydraulic pump (28) and the valve arrangement (29), wherein a pressure sensor (36) for determining the hydraulic pressure is arranged in the hydraulic drive (22).