Noise reduction for suction roll of a paper machine

Details Noise reduction for suction roll of a paper machine Noise reduction for suction roll of a paper machine

D - Textiles, Paper

21

F

D21F 5/14 (2006.01) D21F 3/10 (2006.01)

Patent

CA 2174465

A suction roll for a paper machine or the like including a perforated annular roll shell which is rotatable. A stationary suction box inside the roll shell with respect to which the shell rotates. The suction box is defined between two circumferentially spaced sealing ledges at the roll shell. A noise dampening chamber on the downstream side of the suction box defined by a further sealing ledge at the roll shell. A conduit communicating to the noise damping chamber to allow increased pressure in the chamber which reduces noise. At least one of a snifter valve, a suction blower, an air pump and a water pump communicating to the conduit for selectively adjusting the pressure in the noise damping chamber for damping roll noise.

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