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S.S 304 Shell 316 Suction Box Forged Shaft Fluting Paper Machine Vacuum Couch Roll
1 | shell | 304 stailess steel |
2 | suction box | 316 stainless steel |
3 | shaft head | cast steel/forged steel |
4 | bearing | SKF |
5 | sealing system | graphite, high molecular polyethylene |
6 | bearing seat | cast iron |
The vacuum couch roll is located at the end of the wire section of
the paper machine. Its structure is basically the same as that of
the suction roll. The roll shell is made of bronze or stainless
steel, and the thickness of the roll shell is determined by the
required rigidity and strength. High-strength metal is used to make
the vacuum press roll with a thin roll shell, which is beneficial
to improve the efficiency of pressing and dehydration. Vacuum press
can remove more water from the wet paper, compared with ordinary
press, it can improve the dryness of the paper output, the paper
web is less crushed, the dehydration is more uniform along the
width of the banner, and the felt can be kept in a stable and good
condition .
Structural principle
The vacuum couch roll is dehydrated through its internal vacuum
chamber, and its dehydration strength mainly depends on the vacuum
degree in the vacuum chamber, and the dehydration time and the
amount of air passing through the wet paper are only secondary
factors. The improvement of the vacuum degree has a significant
impact on the dehydration ability of the couch roll.