Backing device for a working roll of a roll stand

A backing device for a working roll of a roll stand placed between the housings of said roll stand and mounted in the guide windows thereof where pressure screws are disposed;

• said device comprising a back-up roll placed between the housings, the ends of said back-up roll being mounted in the guide windows of said housings;
• a hydrostatic bearing having a body mounted on said back-up roll and having a shell shaped as a hollow semi-cylinder of a variable-rigidity cross section and adapted to adjoin said back-up roll so that the internal surface of said shell is spaced by a clearance from the barrel of said back-up roll and is provided with pockets connected in the course of rolling to a source of fluid under pressure;
• a supporting beam whose ends are pressed against said back-up roll by said pressure screws;
• hydraulic cylinders mounted between said supporting beam and said hydrostatic bearing and arranged along said back-up roll so that there is at least one pocket of said bearing shell for each of said hydraulic cylinders, the chambers of said hydraulic cylinders being connected in the course of rolling to a source of fluid under pressure, whereby said hydraulic cylinders act upon the body of said hydrostatic bearing for regularing the thickness of the stock being rolled;
• conduits for connecting in the course of rolling the pockets of said shell and the chambers of said hydraulic cylinders to a single source of fluid under pressure;
• and throttles in the conduits that connect the pockets of said bearing shell to the source of fluid under pressure.