Bevel-helical gear boxes B4 ide high speed shaft HSS Radial shaft seal A Dual B4-VH-5-D

Flender/Flender Gear Units/Bevel-helical gear boxes B4

systems in the oil supply sys- tem operating instructions in the complete documentation for the gear unit. You can find additional information about the components of the oil supply system in the op- erating instructions for the components in the complete gear unit documentation. You can find additional technical data in the separate data sheet and in the list of equipment in the complete documentation for the gear unit. 3.4 Bearing arrangement of the shafts 3.4 Bearing arrangement of the shafts All shafts are mounted in rolling-contact bearings. Thrust bearings are integrated in the gear unit to absorb the axial forces generated by the worm gears. Supplementary cylindrical roller thrust bearings apply preload to the main thrust bearings for no-load operation and fix the extruder shafts axially in the discharge direction. 3.5 Shaft seal 3.5 Shaft seal Introduction Depending on requirements, shaft seals prevent oil from escaping from the gear unit or dirt from entering the gear unit. 3.5.1 Rotary shaft sealing rings 3.5 Shaft seal Rotary shaft sealing rings are the standard seal used. Wherever possible, rotary shaft seal- ing rings are equipped with an additional dust lip which protects the actual sealing lip against external contaminants. Hardened rings or protective sleeves are provided for all rotary shaft sealing rings. NOTICE Irreparable damage to the rotary shaft sealing ring caused by high concentration of dust damaged rotary shaft sealing ring might not be able to effectively seal the gear unit. In very dusty atmospheres, do not use rotary shaft sealing rings unless they have addi- tional protection. Description 3.5 Shaft seal A5-0 en Edition 0/2 2The diagram below shows rotary shaft sealing ring Figure3-1: Rotary shaft sealing ring 3.5.2 Taconite seal 3.5 Shaft seal The taconite seal is combination of two sealing elements: Rotary shaft sealing ring to prevent the escape of lubricating oil Grease-filled dust seal (comprising labyrinth and lamellar seal)