Dual Shaft Arrangement with Adjustable Axial Spacing and Improved Sealing Unit

A device, comprising:

• two rotatable shafts arranged at least substantially parallel to one another and having associated rotational axes with adjustable mutual spacing, wherein the shafts each extend through a wall separating a drive side from a product side and are sealed with respect to the wall,
• wherein the sealing between each shaft having the adjustable rotational axis and the wall is effected by a sealing unit which surrounds the associated shaft in a region of the wall and maintains its relative position to the rotational axis when this rotational axis is adjusted,
• wherein the sealing unit comprises, radially inwards, a dynamic seal for sealing between the rotatable shaft and the sealing unit and, radially outwards, a static collar seal fixed in a sealing manner radially inwards on the sealing unit and radially outwards on the wall and comprises an elastic sealing collar,
• wherein the static collar seal includes a radially inner limb received in a first pressure ring secured on a base body of the sealing unit so that an end face of the radially inner limb is pressed against the base body of the sealing unit by the first pressure ring, and a radially outer limb received in a second pressure ring secured on the wall, wherein the first pressure ring and the second pressure ring are arranged on the drive side of the device so that only the elastic sealing collar is exposed to the product on the product side.