What is the focus of my country's graphite sealing device?

The development trend at home and abroad is several major bearing companies in Japan (precision, Toyo, Two weeks, etc.) represent the development direction of bearing sealing technology. They have a long history and in -depth research on the development of seal bearing device technology. At present, sealing technology is relatively mature. From single -secret lips to multiple sealing lips, from contact with seal to non -contact sealing. In terms of product types, there are rolling bearing and rolling bearings. Following the trend of international development, my country has also developed several types of bearing with densely sealing rings, such as deep groove ball bearings, water pump bearings, railway (conical roller) bearings, rolling needle bearings, short cylindrical roller bearings, etc. Among them, deep groove ball bearings have a large output and wide range of application. According to the results of the National Science and Technology Bureau's recent inspection of the quality of the bearing of my country's sealing bearing, my country's sealing bearing has problems such as poor sealing effects and severe fat leakage in structural design. The user reports strongly. After analysis, the main reason is that the design structure of the current sealing ring in my country is unreasonable, there is no dense seal in the inner ring, and the manufacturing accuracy is not high.

The newly developed rolling bearing noodles are equipped with corresponding sealing devices. Its role is to keep the internal oil (oil) inside the bearing without loss in use to ensure the bearing in the lubrication state; on the other hand, to prevent dust or harmful gases outside the bearing bearing cavity and prevent bearing damage. There are commonly used rubber or engineering plastic sealing rings, as well as stamped steel sealing circles (or dust cover). The sealing structure of its sealing ring has a variety of sealing structures, and its sealing effect is also different. If there is a gap between the sealing ring and the turning shaft, it is called non -contact seal. The smaller the gap, the better the sealing effect, but the smaller the speed of the axis. On the contrary, the opposite is the opposite. If there is no gap between the sealing ring and the rotation axis, it is called contact seal. The larger the contact area of the sealing lip, the better the sealing effect, but the smaller the allowable speed of the shaft, the opposite. The main research content of sealing technology is to study and develop corresponding sealing devices suitable for different working conditions, as well as the compatibility of sealing materials and corresponding lubrication.

Choose the foundation

The installation of graphite bearing device has been installed for nearly four years. The bearing was open in the past. In order to ensure the lubrication and dust of the bearings, the shaft at both ends of the bearings is equipped with a sealing device. With the development of industries, especially the popularization of the food industry, modern office machinery, and home appliances, the equipment design is required to be compact and reduce the weight to prevent water leakage. Therefore, a bearing with a sealing device appears. The first is the widely used in deep sulcus bearing, a large number and a wide range. In recent years, various rolling bearings have different sealing bearing. Bearing sealing is one of the important directions for the development of bearing technology. At present, a quarter of China's bearing production has been sealed. In the next ten years, there will be 2-3 bearing structures each year, and 20 million-30 million bearing will develop into a sealed structure bearing. Different structural bearing and different operating conditions require different sealing ring structures and materials, so its research and development work is very large.

The main research content and goals are based on the current status of poor quality of the bearing of the bearing in my country. The main research content in the future is as follows: First, through research and testing, select the sealing ring structure of deep groove ball bearing, develop the corresponding inner ring sealing slot structure of the bearing inner ring, update the present presentation There is a sealing structure with a deep groove bearing. Strive to catch the sealing performance of this type of bearing in 2005 to catch up with the international advanced level of similar products in the late 1990s; secondly, combined with the development of my country's automotive industry, it has developed a high-temperature seal bearing suitable for long-term work at 120-180 ° C. Third, a new sealing structure of the conical cylindrical roller bearing series represented by railway vehicle bearing is developed.

Therefore, the future development trend of my country's bearing sealing technology is: represented by deep groove ball bearing, conducting sealing technology tests, finding a sealing ring structure and sealing life, carrying out the research of sealing materials, finding wear resistance, aging, high temperature resistance, corrosion resistance Materials, in order to extend the sealing life, laid the technical foundation for the sealing ring that developed under high temperature or harmful atmosphere.