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Two different machine types are used with side entry drives. These have bearings on one or two sides. One-sided bearings only occur in smaller machines. The weight of the shaft, as the size increases, causes deflection and bending of the shaft that has to be absorbed by the seal. For this reason, the mechanical seals are equipped with an integrated bearing.
Larger machines have bearings on two sides. Under certain circumstances, however, the weight of the shaft during operation causes bending that has to be tolerated or compensated by the mechanical seal. In addition, on one side, the seal must compensate for changes in the length of the shaft caused by thermal expansion.
These axial movements can be absorbed by scrapers or metal bellows. Bellows can compensate for a misalignment of up to 500 mm (19.69”); scrapers tend to be used for small deflections.
Paddle-wheel dryers and double conical dryers are typical machines that are equipped with bottom entry drives.
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EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.
Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.
What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.