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The key to the "rolling mill SKF imported bearings"
Source: China Bearing Network Time: 2014-05-27
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If the rolling mill bearing is not correct, it is very simple to damage. Many brothers use SKF bearings on the rolling mill to be damaged; the key point is that they do not know the correct application.
1. The smooth and smooth grease method is simple and easy to implement; the roller is convenient to replace; it is widely used. It should be selected according to the bearing temperature, rotation speed, rolling force, sealing and waterproof function, impact sensation, and grease supply. Suitable smooth grease. Use smooth grease with high temperature resistance, high viscosity, excellent extreme pressure function and high water-resistance function. According to the operation characteristics of rolling mill bearings, 2#, 3#, lithium base with EP additive should be selected. Fat or polyurea. Although the high-performance smooth fat purchase cost is high; but the amount is low; the bearing life is long; the total induction cost is reduced. The filling amount of other smooth grease must be excessive and filled in place; not the same The smooth grease of the trademark can not be mixed; the appearance of the rolling mill bearing operation is always in the normal state of the oil film.
2. Filling the grease with the grease can fill the inner space of the bearing at the beginning; about the vertical roller or the inclined roller, the upper and lower covers of each bearing seat should be filled with the smooth amount of grease. After each roller change, check whether the smooth grease can be Hardening and blackening; whether it can be contaminated by impurities; whether it can be oxidized and emulsified. If the above conditions are present, the smooth grease should be completely replaced and the seal and sealing layout should be replaced or improved in time. If the condition is still good, the new fat can be used continuously.
3, oil and gas smooth oil and gas smooth is a smooth method of bearing ambition, the bearing at the working edge of the compressed air at intervals of time with a smooth oil drop into the bearing inside; smooth oil stays inside the bearing, the air takes away the heat in the bearing operation, together Impede the external impurities, water vapor is immersed in the bearing. The oil is not atomized and does not pollute the environment.
4, sealing equipment bearing seal is to adhere to the outstanding internal smooth condition; and hinder the cooling water, iron oxide skin, impurities immersed in the operation of the extended bearing life of the operation. Because the bearing seal problem of the rolling mill; bearing damage is the most close to the side of the roll Parts; bearings are often contaminated and lost due to smooth grease; wear, detachment or even fragmentation of the parts; especially the emulsion of the cold strip mill; the smooth grease fails faster. The seal of the bearing is divided into its own seal and external Sealing two. The external seal is mainly selected by the combination of labyrinth and touch. The more stages of the labyrinth (not lower than the north and south poles), the smaller the gap, the better the sealing effect. The gap of the labyrinth depends on the size of the bearing scale. One side 0. 6 ~ 1. 5mm, axial 4 ~ 6mm. Touch type skeleton oil seal: it is widely used in the rolling mill; for the addition effect can be used side by side. Oil seal is directional; can not be reversed. Hot rolling The machine usually has two oil seals; the two oil seal lips must be outside the bearing housing; to prevent the external dirt from immersing. The cold strip mill usually has three oil seals close to the bearing. The lip seal should be inward; it is used to hinder the smooth grease overflow and affect the quality of the rolled material. Be careful when using the oil seal; prevent the lip from being damaged when loading the roller; affect the sealing effect. RBR seal ring: This is a special bearing for rolling mill bearings. Rubber lip seal ring; widely used in these years. RBR seal ring adopts axial seal method; its lip is attached to the base surface of the gland; it is not affected by the roll jump; the old grease inside the bearing can overflow; external The cooling water, iron oxide scale and impurities are obstructed by the lip; it has a good sealing effect and is convenient to use; when the roller is changed, the roller is not affected by the bearing seat.
SKF brand has a long history; but today, SKF has not only represented the well-known high-quality rolling bearings. For the vast number of users; more has the meaning of Dongduo.
SKF's bearing profession in the world; adhering to the leadership position; years of unremitting efforts to develop skills in multiple areas; products and services; has become a bearing company that is truly a supply-oriented solution; inventing greater value for users .
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