What should be paid attention to in the seal design of deep groove ball bearings

In the application of deep groove ball bearings, the selection of sealing materials plays a vital role. The materials of seals usually include rubber, polyurethane and plastic. Choosing the right material can not only significantly improve the sealing performance, but also enhance its durability. Rubber seals are suitable for use in low temperature and low pressure environments due to their excellent elasticity and wear resistance. Polyurethane seals are suitable for applications under high load and high temperature conditions due to their excellent wear resistance and oil resistance. Plastic seals, such as polyethylene and polypropylene, although they perform well in corrosion resistance, are relatively inadequate in stability under high temperature and high pressure environments. Therefore, when selecting sealing materials, it is necessary to comprehensively consider the specific working environment and the use conditions of the bearing to ensure that the seal has excellent physical properties and chemical stability.

The structural form of the sealing design should not be ignored either. The sealing design of deep groove ball bearings usually adopts two solutions: contact sealing and non-contact sealing. Contact sealing relies on the contact between the sealing ring and the inner and outer rings of the bearing to achieve the sealing effect. It usually has good sealing performance, but it will increase friction, which may affect the operating efficiency of the bearing. In contrast, non-contact seals reduce friction through reasonably designed gaps and are suitable for high-speed operation, but their sealing effect is relatively weak. Therefore, in the process of seal design, the sealing effect and friction loss must be considered comprehensively to select the most suitable seal form.

The geometry and installation method of the seal also have a significant impact on the sealing effect. The design of the seal ring is usually circular or rectangular, and it is crucial to ensure that it can fit tightly to the surface of the inner ring or outer ring to avoid leakage problems caused by excessive gaps. In addition, the installation method of the seal ring also needs to consider the assembly process of the bearing to ensure that the seal is not damaged during the assembly process, thereby affecting its sealing performance. Reasonable geometric design and precise installation process can effectively improve the sealing effect of the seal and reduce the potential risk of failure.

In the process of seal design, the influence of operating temperature and pressure cannot be ignored. When deep groove ball bearings are running, the heat generated by friction may cause the temperature to rise. The performance of sealing materials may decrease at high temperatures, so when designing seals, it is necessary to ensure that the selected materials can maintain good performance within the expected operating temperature range. In addition, under high pressure environment, seals need to have sufficient compressive strength to prevent seal failure due to excessive pressure. Therefore, in the seal design stage, the working conditions of the bearing need to be fully evaluated to select the appropriate sealing material and design scheme.

The selection and application of lubricants are also key links that cannot be ignored in seal design. The type and viscosity of lubricants directly affect the performance of seals. Suitable lubricants can effectively reduce friction and wear and extend the service life of bearings. In seal design, the properties of lubricants need to be considered to ensure their compatibility with sealing materials to avoid aging or failure of seals due to penetration or chemical reaction of lubricants. In addition, the filling amount of lubricants also needs to be reasonably controlled. Too much lubricant may cause leakage of seals, while too little may cause insufficient lubrication.