What to do if the guide rollers on the dryer drum of a paper machine break frequently?
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What to do if the guide rollers on the dryer drum of a paper machine break frequently? 1. Paper machine specifications: Paper type – Grade A corrugated base paper; net paper width: 4400 mm; web width: 4950 mm; basis weight: 100–180 g/m2; operating speed: 280–360 m/min; designed speed: 500 m/min; dynamically balanced speed: 650 m/min; nominal production capacity: 250 t/day; drive system: AC variable-frequency decentralized drive.2. Guide roller specifications: Diameter 346 mm, width 5150 mm; the roller body is made of 20# seamless steel pipe. At an operating speed of 380–400 meters per minute, guide rollers break frequently, and even components such as the dry mesh get damaged. Apart from replacing them all, are there any other effective solutions? Thank you!
Is it caused by poor concentricity? When the devices are not aligned and the rotation speed is too high, severe vibration at the center area can easily lead to breakage. Can it be modified? 》 Replace one long roller with two short rollers, or add a supporting and fixing component in the middle to secure the middle part of the long roller and prevent it from vibrating eccentrically.
There are mainly three reasons: 1. Eccentricity of the guide roller, 2. Excessive tension, 3. Problems with design and assembly
Is your roller body welded? That means there is a problem with the welding process.