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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>New ultra high load capacity bearing seals New ultra high load capacity bearing seals
Bearing seals are the key components for normal operation of bearings in harsh environments. They protect the bearings from corrosion and contamination, and extend the life of the bearings under excellent hygienic and smooth conditions. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
In general, bearing seals are more effective than dust caps and are subject to shifting sensitivity and lower speed transitions. It is necessary for the painter to consider the function and delivery system of the smoothing agent and hope when selecting the appropriate seal. Working conditions.
In order to meet the high load, strong impact, and water and rust intrusion, NSK has developed a new type of sealed, clean and smooth roll bearing with ultra-high load capacity. I heard that the bearing can be used. With 34% load capacity, it has higher reliability and can work for a long time under harsh and smooth conditions. It improves the bearing function after sealing, blends the optimized mechanical principle, the patented technology of new materials and seals, and is easy to operate. .
In a typical sealed roll bearing, the main seal and width constrain the length of the roller, ie the bearing load of the bearing is constrained. Therefore, in the new roll bearing depiction, the retaining frame edge is included in the seal blank. The roller can be made longer, so that the diameter of the bracket is added and the roller is lengthened, and the length of the bracket is not added, and the basic additional load capacity of 34% is increased, which is equivalent to extending the bearing life of 27 times. The quality of the bearing is selected. TF" bearing steel is also the key to improving the function of the bearing. The impurities and smooth unevenness in the material guess are the main reasons for the premature failure of the bearing.
Experience shows that under contaminated working conditions, the bearing is easy to enter the debris, and these debris particles damage the raceway, forming a stress gathering. In addition, if the smoothness is uneven, the metal surface is hard touched, forming a small "peeling" damage. It also incurs the stress concentration in the touch area. These two results cause the metal surface of the stress gathering part to crack and shorten the bearing life.
NSK's research indicates that the modified bearing steel arrangement can improve the bearing life under the condition of impurity pollution or marginal smoothness, and improve the ability to release the concentrated stress at the margin.
But the best useful protection is: when the impurities appear, it is hindered. NSK's new seals have the patents of the above two advantages. This new type of hole seal can handle the negative pressure in the bearing. Avoid water ingress, so that the main seal is not directly exposed to the water, avoiding "breathing" in the water, and functioning to block impurities in the groove. The normal seal is linearly touched during rotation and stop. Adhere to the high-strength sealing function, and replace the linear touch with the surface touch when working on the seal, and then get used to the sealing requirements in the bearing rotation: not only tight sealing, but also no large negative pressure.
In order to prove its efficacy, NSK has further carried out simulation experiments. In the experiment, the operating speed of the bearing increased from 100r/min to 700r/min, and the radial load of 294kN was continuously applied, together with water of about 100L/min. Spray. The usual hole seals are added at this time, while the new type of hole seals are pressed against the negative pressure.
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New ultra high load capacity bearing seals
Source: Bearing network time: 2017-11-29