The seal rings are a very important component of bearings, which can be used to make a dustproof seal between bearing components and components outside the system. Without it, there might be serious damage to the bearing, as dirt and dust can be a great detriment to the moving parts. Therefore, bearing manufacturers always put great emphasis on the quality of their seal rings.
In bearings, there are two types of seals, one is contact seal and the other is non-contact seal.Contact seals are the most common type used, and the grooves between them are slightly different from the non-contact. The contact seal ring is used to make contact between the bearing components and the components outside the system, so that the dirt or dust in the external environment has nowhere to enter, and the added lubricant can be completely maintained to ensure bearing lubrication. In this case, the need of a contact seal is even more important.
Non-contact seal ring can also effectively isolate external dirt and dust to achieve the effect of dustproof. Its principle is to form a certain gap between the shaft and the bearing, and the friction of the gap can cause a certain eddy current or air circulation in the gap, thereby achieving the aim of dustproof effect. Compared with the contact seal, this type of seal ring is more reliable and has greater adaptability to the external environment, but due to its high cost, it is not widely used.
Different from the seal rings used in other industrial fields, the seal rings used in bearings have very strict requirements for quality. The materials used need to be of excellent quality, and the performance of the seal ring must also meet certain standards. In particular, the sealing performance of the seal ring must be good, which can ensure that the bearing system is isolated from the external environment and prevent dust and dirt from contaminating the system.
In addition, the seal ring is also required to possess certain fatigue resistance and corrosion resistance, so that it can be used in the extremely harsh environments, such as the bad operating environment (such as the temperature environment, pressure environment, etc.), where the bearing usually works and can be used for a longer time.
In this case, the manufacturers of seal rings not only need to choose hard and wear-resistant materials, but also need to be designed and produced according to the nature of the environment. The process and product testing of a seal ring need to be completed before it can be delivered to the customer.
In summary, the seal ring is an important part of the bearing system. It not only has a certain sealing effect, but also has very high requirements for the materials and process requirements. In this regard, bearing manufacturers pay more and more attention to the selection and process of the seal ring.
