Shoe Dryer,Footwear Care,Drying Solutions Ningbo Brace Power Tools Co., Ltd , https://www.cnbrace.comBearing Production Key Skills
Modern simulation techniques have rapidly evolved with the widespread use of computers. These techniques involve inputting parameters such as bearing load, direction, lubrication method, rotational speed, and environmental conditions to determine the bearing's main parameters. Through calculations, engineers can estimate the bearing’s lifespan and evaluate whether it is suitable for the intended application. This experimental approach significantly reduces testing time, labor, and costs, allowing for quick and reliable assessments before the bearing is even manufactured. Leading global companies like SKF and NTN have achieved advanced levels in bearing simulation technology.
At home and abroad, there are four main types of bearing testing methods: friction wear tests, test bench experiments, laboratory simulations, and field trials. Each method has its own purpose. For example, when developing a new product, a friction wear test is typically conducted first. If the wear pattern remains unchanged but the operating conditions or scale changes, then a test bench or field experiment may be used instead. Foreign manufacturers, especially for critical components like car wheel bearings, often require real-world testing. Companies like SKF in Sweden and NTN in Japan have made significant progress in simulation experiments, aiming to replace traditional testing methods and accelerate development cycles. However, these technologies are still not fully integrated into practical applications.
In China, several institutions have started conducting friction wear tests and test bench experiments. The Luoyang Bearing Research Institute, Hangzhou Bearing Experiment Center, and over 20 state-owned bearing companies now offer simulation experiments. As long as the host company requests it, bearing manufacturers can perform these tests. Examples include railway wheel bearings and automotive wheel bearings. However, the application of imitation and field experiments is still limited, and expanding the scale of these tests requires further development.
The main focus of simulation experiments involves conducting bench or simulation tests on representative products to establish the relationship between bearing life and working conditions. Based on this, bearing design and testing can be carried out, especially for critical components. Over the past decade, research has focused on railway vehicle bearings, automotive wheel bearings, and high-speed grinding spindles. China has gradually developed the necessary infrastructure for simulation experiments.
Lubrication skills play a crucial role in bearing performance. Rolling bearings fail due to constant wear, and the type of lubricant (grease or oil) and lubrication method greatly affect their performance. Some refer to lubricants as the “fifth component†of the bearing, alongside the inner ring, outer ring, rolling elements, and cage. The resistance to rotation includes rolling friction, sliding friction, and lubricant friction. Understanding and optimizing these factors is essential to reduce bearing resistance and improve efficiency.
Globally, leading countries have developed comprehensive lubrication technologies under standard working conditions. They have established a range of lubricants and production capabilities. Current trends include studying specialized lubricants for extreme environments, such as vacuum-stable perfluoroether greases for aerospace or low-temperature greases with improved viscosity-temperature properties. In China, efforts should focus on improving the service life of sealed bearing greases, reducing noise, and developing new types of lubricants to fill domestic gaps.
Sealing technology is another vital aspect of bearing performance. Seals prevent grease loss and protect against external contaminants. Common sealing methods include rubber rings, plastic seals, and metal dust covers. The design and material compatibility of these seals are crucial for long-term performance. While Japanese companies like Seiko and Dongpu have advanced sealing technologies, Chinese bearings still face challenges in sealing effectiveness and leakage issues. Improving seal layout, precision, and material compatibility is key to future developments.
Noise reduction is also an important area of focus. Bearing noise affects both the environment and user experience, especially in household appliances and precision machinery. Although China has made progress in reducing bearing noise, there is still a gap compared to foreign standards. Issues like irregular sounds and sudden noises remain. Future trends involve achieving quieter bearings and improving vibration control to match international standards.
In summary, bearing production involves a combination of simulation, lubrication, sealing, and noise reduction technologies. Continuous improvement in these areas will enhance bearing performance, reliability, and user satisfaction. As China continues to develop its bearing industry, investing in research and innovation will be essential to meet global demands.
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For more information, visit [China Bearing Network](http://www.chinabearing.net).
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Source: China Bearing Network | Time: 2013-07-25