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Bearing sealing skills
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The selection of sealing equipment based on bearing equipment is nearly four years; the previous bearings are open; to ensure the smoothness and dustproof of the bearing; the sealing equipment is placed on the shaft of the two ends of the bearing. Follow the development of the industry; especially the food industry Modern working machinery and home appliances; demanding equipment is compact; component reduction must avoid water leakage; air leakage; this presents the bearing with its own sealing equipment. First of all, it is used in deep groove bearings with a large amount of surface. In recent years, all kinds of rolling bearings have bearing with different sealing rings; bearing sealing is one of the important directions of bearing skill development; at that time, one quarter of China's bearing output value has been installed with sealing ring; There will be 2-3 kinds of bearing layouts every year; 2000-30 million sets of bearings will be unfolded into sealed layout bearings. Different layouts of bearings and different working conditions; the layout of the required sealing ring is different from the data; therefore, its research and development work The volume is very large. The trend of domestic and international development of several major bearing companies in Japan (Seiko, Dongpu, Wuyue, etc.) represents the direction of bearing sealing skills. They are developing The bearing history of the bearing equipment is relatively early; the depth of the research is large; the sealing skills are more sophisticated. The sealing lip has been developed from a single sealing lip to a multi-sealing lip; the non-touch sealing is announced from the touch seal, from the product type; the ball bearing Roller bearings are available. China has followed the trend of the world; also announced the deep groove ball bearing, water pump bearing, railway (tapered roller) bearing, needle roller bearing and short element roller roller bearing with sealing ring Bearings; deep groove ball bearings have the largest output value; the most widely used. According to the recent results of the National Skills Bureau on the quality of China's sealed bearings; China's sealed bearing layout design problems are large; the sealing effect is not good; the leakage of fat is more severe; users The result is fierce. After analysis, the main reason is that the current seal circle layout in China is unreasonable; the inner ring does not have a sealing groove; plus the production precision is not high. Therefore, the trend of China's bearing sealing skills is deep: Groove ball bearing is representative; unfolding sealing skill experiment; searching for optimal sealing ring layout and optimal sealing life; unfolding sealing data discussion; Loss; aging; high temperature and corrosion-resistant materials; progress touch seal life spans; seal under high temperature conditions or development work in hazardous atmospheric conditions lay the foundation skills.
The main research contents and guidelines are based on the current low quality of sealed bearings in China. The first discussion is: first, to discuss the experiment; and to screen out the seal layout of deep groove ball bearings and develop the layout of the corresponding inner ring seal groove; The current layout of the deep groove ball bearing seal layout has been replaced. In 2005, the competition for this type of bearing caught up with the advanced level of similar products in the world in the late 1990s, followed by the development of the car industry in China; the development is suitable for 120-180 The high temperature sealed bearing for long time operation at °C high temperature, the third is the new layout of the seal series of the tapered cylindrical roller bearing bearing represented by the railway vehicle bearing.
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