Rubber Pulleys for Vacuum Belt Filter

Each filter is equipped with a drive pulley and a driven pulley; the cylindrical surface and lateral surface are covered by SBR rubber. For the drive pulley, the rubber layer thickness is no less than 30 mm, while the thickness is 16 mm at the tip, with the hardness of 65 degrees. For the driven pulley, the rubber layer thickness is 25 mm. V-shaped grooves are carved on the rubber layer of the drivepulley, to drain the excess fluid and increase the adhesive force of the rubber layer. The service life is up to 100,000 hours. The design and manufacture of all rollers (including the rubber belt support roller, the filter cloth supporting, bendand tension rollers, the filter cloth press roller, and the cloth flattening roller) are of low bending stress, that is: the roller does not bend during load running; the bearings of all rollers adopt self-positioning double-seal ball bearings, and simultaneously the sealing effects are fully taken into account, the mother liquid is not allowed to enter the bearing body. The structure that the bearing body is placed externally and fixed on the framework is not recommended.
The invention patent technology (ZL96115855.7) is used. The roller material is plastic alloy. Built-in design and labyrinth design are employed in the bearing, to ensure that the bearing is not corroded by atmosphere and penetration, which can greatly improve the bearing life.
It uses Q235 seamless pipe, with SBR rubber covered on the surface and the rubber thickness is 20 mm. For the rubber-covered roller, the diameterof DU-72 m2/3200 is φ345. Both ends of the roller are connected to the framework with bearings and one-piece sealed bearing support. The bearings adopt heavy series double-row self-aligning roller bearings.
It is mounted infront of the feeding hopper, and its role is to ensure the effective integration of the filter cloth and rubber belt before the filter cloth entering the feeding hopper. The material is Q235 lining plastic. It is of tapered design at both ends, with a diameter of φ325.