| 摘要 |
The drum or roll (12) may be heated to high operating temperatures (up to 425 DEG C) and is particularly useful in high heat flux conditions of high nip and distributed loads on the drum (12). It consists of a thin rotating shell (32) made from high thermal conductivity materials and supported on an axially located stationary inner core (34). The core has a plurality of shell support bearings (36, 38, 40) having close radial clearances with the shell inner surface (32) at each location where an external nip roll (14, 16, 20) would be engaged. The spaces between the shell support bearings (36, 38, 40) form pressurizable chambers (42, 44, 46) which can be filled with a hot pressurized fluid for supporting the shell (32) between the supports (36, 38, 40) located at the nip positions. The fluid support system for the rotatable shell (32) enables a very thin shell to be used. This permits the desired heat flux while still maintaining the mechanical integrity to support the applied loads. |
