The importance of bearing seals, the detection of bearing seals by Hirays seal testing equipment

The installation of sealing devices on bearings has been a matter of more than 4 years. In the past, bearings were all open type. In order to ensure the lubrication and dust prevention of the bearings, sealing devices were installed on the shafts at both ends of the bearings.With the development of industry, especially the food industry, the popularization of modern office machinery and home appliances, and the development of automation, equipment is required to be compact in design, reduce weight, and be waterproof and prevent air leakage. This leads to the emergence of bearings with sealing devices on the bearing itself.First of all, it is widely used in deep groove bearings with large volume and wide range. In recent years, various types of rolling bearings have appeared with different sealing rings. Bearing sealing is one of the important directions in the development of bearing technology. Currently, a quarter of my country's bearing output has been equipped with sealing rings. In the next ten years, there will be 2-3 types of bearing structures every year, and 20-30 million sets of bearings will develop into sealed structure bearings.Different structures of bearings and different working conditions require different structures and materials of sealing rings, so the research and development workload is very large. Therefore, mass production or research stage requires a sealing testing equipment. The sealing testing equipment of Shenzhen Hirays Automation Technology is a very good choice.

Corresponding sealing devices are installed on both end faces of newly developed rolling bearings.Its function is, on the one hand, to keep the grease (oil) inside the bearing from being lost during use and to ensure that the bearing is in a lubricated state. This requires a sealing detection technology. Shenzhen Hirays has been committed to the research of sealing detection technology for many years, and the sealing detection technology is quite abundant.On the other hand, it protects the dust or harmful gases from outside the bearing from entering the inner cavity of the bearing to prevent damage to the bearing.Common ones include sealing rings made of sealing rubber or engineering plastics, as well as sealing rings (or dust covers) made of steel plates.The sealing structures of the sealing rings are various, and the sealing effects are also different.If there is a gap between the sealing ring and the rotating shaft, it is called a non-contact seal. The smaller the gap, the better the sealing effect, but the smaller the allowed shaft speed; on the contrary, the opposite is true.There is no gap between the sealing ring and the rotating shaft, which is called a contact seal. The larger the contact area of ​​the sealing ring contact lip, the better the sealing effect, but the smaller the allowed shaft speed, and vice versa.The main research content of sealing technology is to research and develop corresponding sealing devices applied under different working conditions, as well as the compatibility of the sealing ring material and the corresponding grease, etc.

Development trends at home and abroad

Several major bearing companies in Japan (Seiko, Toyo, Fujikoshi, etc.) represent the direction of the development of bearing sealing technology.They have an early history in developing sealed bearing device technology and have extensive research depth. Currently, their sealing technology is relatively mature.It has developed from single sealing lips to multiple sealing lips, and developed from contact seals to non-contact seals. In terms of product types, there are both ball bearings and roller bearings.Following the international development trend, our country has also developed several types of bearings: deep groove ball bearings with seals, water pump bearings, railway (tapered roller) bearings, needle roller bearings and short element cylindrical roller bearings. Among them, deep groove ball bearings have the largest output and the widest application range.According to the recent quality inspection results of my country's sealed bearings by the National Technology Bureau, my country's sealed bearings have major structural design problems, poor sealing effects, serious grease leakage, and strong user feedback.After analysis, the main reason is that the current design structure of the sealing ring in my country is unreasonable, the inner ring does not have a sealing groove, and the manufacturing accuracy is not high.Therefore, the future development trend of bearing sealing technology in our country is: taking deep groove ball bearings as a representative, carry out sealing technology experiments to find the best sealing ring structure and best sealing life, conduct research on sealing materials, and look for wear-resistant, aging-resistant, high-temperature-resistant and corrosion-resistant materials. This will lay a technical foundation for improving the life of contact seals and developing sealing rings that work under high-temperature conditions or under harmful atmosphere conditions.

Therefore, if domestic bearings want to achieve greater success, they must first solve the sealing technology problem. In the process of continuous improvement of technology, problems of this kind always occur during production, so sealing testing equipment is indispensable.Shenzhen Hiraysi has been committed to the research of seal detection technology for many years. Now, through continuous efforts, there are many seal detection equipment that are best-selling in the market, such as bearings.Seal testing equipment, mobile phone waterproof testing equipment, etc.It has won high praise from customers and has become a beacon in the sealing testing and waterproof testing industry.