Berlin/Schleinford, September 23, 2010 For several years, the Schaeffler Industrial Division has become a major partner in the research and development of high-speed train rolling bearings. When developing such bearings, we work closely with vehicle manufacturers and operators to optimize products to meet specific operating conditions. The Schaeffler Industrial Division is a development partner and rare supplier of axle box bearings for the Velaro-RUS high-speed train in Russia and the CRH3 high-speed rail project in China, which has a speed of up to 350 kilometers per hour. In tests conducted according to the EN12082 standard, Schaeffler Group confirmed that the axle box bearings can be applied at 380 km/h. In addition, Schaeffler Group has also developed and produced axle boxes and bearings for motors and gearboxes. The design of double row tapered roller bearings is the key to the high load-bearing capacity of axle box bearings. Due to the adoption of the high-speed train concept, the bearing units are specifically designed for axle loads ranging from 17.7 to 19 tons. The driving components and technical modules of the EMU are arranged below the floor of the entire train, not limited to the front and rear locomotives of the push-pull train. The arrangement of the high-speed train and trailer in sequence has improved the mass distribution of the entire high-speed train, resulting in a relatively moderate load acting on a single wheelset. Due to its high speed, the design speed of the bearing reaches 2400 rpm. The easy to install TAROL unit mainly uses tapered roller bearing units in high-speed applications due to the possibility of special loads. The FAG TAROL unit provided by Schaeffler Industrial Division is extremely easy to install. When the TAROL unit leaves the factory, the clearance has been adjusted, grease has been added, and sealing has been installed. It can provide English and metric series as well as necessary locking parts and matching parts, ensuring fast and reliable installation. In addition, customized components, spare parts, and load-bearing saddles can be provided according to customer needs. Schaeffler's engineers can also provide professional training for customer operators to ensure that customers can correctly install axle box bearings. In this way, the customer obtains certification and authorization to install axle box bearings. Special attention must be paid to the quality of materials under high loads and ultra high speeds to ensure proper lubrication of bearings. To this end, Schaeffler Group has collaborated with steel manufacturers to develop special standards to improve the purity of the steel used. In addition, Schaeffler Group also adopts its own special quenching process, coating process, and coating type. When choosing the appropriate lubricant, additives and viscosity are decisive factors. Schaeffler Group has closely cooperated with lubricant manufacturers in this area. At the same time, the amount of lubricating grease is also very important, especially in high-speed applications where excessive lubricating grease can cause excessive and rapid bearing temperature rise. The shape optimization of the axle box reduces the load. In addition to the bearing unit, the Schaeffler Industrial Division has also developed and manufactured the axle box. As the connection between the bogie frame and the wheel set, the axle box must be able to safely transmit loads. The design of the axle box depends on the transmission method of the force applied. The optimized shape of the axle box can improve the pressure distribution of the rolling bearing, thereby reducing special loads and avoiding stress concentration on the bearing contact surface under load. Supported by FEM calculations, comprehensive experiments are used to ensure the optimal design of the axle box. The finite element method not only describes the complex geometric shape of the axle box, but also reflects the complex stress gradient distribution of the axle box as realistically as possible. The manufacturing material of the axle box is ductile iron. Rolling bearings have achieved a high quality level of "class 1" through a series of tests based on DIN EN 12080 standards, including ultrasonic testing of the inner and outer rings. The axle box bearings need to be verified on a dedicated test bench in accordance with the EN 12080 standard. The Velaro RUS axle box is designed according to special temperature requirements, and can achieve a lower impact strength of 12 joules even at -50 ℃. According to the standard, this value only needs to be reached at -20 ℃. Most high-speed trains use bearings for motors and gearboxes, which belong to fully electrified EMUs. They usually use three-phase asynchronous motors controlled by frequency converters, which increase the risk of current passing through the rolling bearings and serious damage to the raceway. The Insect insulation coating used by Schaeffler Industrial Division can effectively prevent the occurrence of such bearing damage. Usually, ball bearings and cylindrical roller bearings are used as positioning and non positioning bearings to support the motor rotor, so suitable insulation coatings can be applied to their outer rings. The input shaft speed of the gearbox is very high, up to 6000 rpm, and the design of the input shaft bearing must be suitable for this high speed. For this purpose, ball bearings and cylindrical roller bearings are mainly used here. The gearbox output shaft is subjected to high impact loads, and Schaeffler Group uses reinforced cages to prevent bearing damage* Schaeffler Industrial Division has INA and FAG brands, providing rolling bearings, sliding bearings, and linear and direct drive products to approximately 60 different industries by approaching the global market and providing application support services. The product range includes 225000 products, ranging from micro bearings ranging from small to a few millimeters, such as those used for dental drills, to large bearings with an outer diameter of several meters, such as those used for wind turbines. Schaeffler Group has approximately 65000 employees worldwide and over 180 branches, with sales of approximately 7.3 billion euros in 2009. Schaeffler Group is a globally renowned rolling bearing manufacturer and automotive component supplier. Tapered roller bearing unit TAROL: can be assembled in real time, easy to install/Axle box and axle box bearings: The optimized shape of the axle box improves the pressure distribution of the rolling bearing, thereby reducing special loads and avoiding stress concentration on the bearing contact surface under load. China High Speed Railway Project (CRH3): With a speed of up to 350km/h, it adopts Schaeffler axle box bearings designed for insulated rolling bearings of traction motors. It effectively prevents damage to bearings due to electrification. Traction motors and gearbox bearings are suitable for high load and high speed high-speed trains. The performance and characteristics of high-speed pure rolling bearings used in high-speed trains are as follows: The performance and characteristics of high-speed pure rolling bearings used in high-speed trains can improve their safety and reliability, increase their original speed, increase their load capacity, reduce driving noise, improve train vibration resistance, reduce energy consumption, have a long service life, and require less maintenance, especially on high-speed trains at speeds of 500 kilometers per hour, The application of new high-speed bearings has greatly improved the running speed of locomotives. Moreover, due to the absence of the dangerous and unsafe factors of the original bearing cage in high-speed new bearings, high-speed train bearings produced based on the principle of high-speed pure rolling bearings can greatly improve the safety, reliability, and maneuverability of high-speed trains and ordinary trains during operation. At the same time, it will make it possible for high-speed trains to travel safely, at high speeds, and with heavy loads. The train bearings commonly used in China are imported SKF company train bearings and some domestic bearing manufacturers' train bearings. However, this type of bearing with a cage structure, due to the inherent danger and damage factors of the cage, causes the train bearings to work in unsafe and dangerous conditions all the time. The commonly used train bearings are designed to reduce the usage time of the bearings to ensure the safe and reliable operation of the train. The bearing design ensures the safe operation of the train by replacing it for maintenance and repair after 4000 hours of use and 2000 hours of use. The sliding friction produced by this modern bearing with a cage structure cannot be eliminated, so the modern train bearing designed by this structure keeps the bearing operating in an unsafe state. Therefore, its failure is an inevitable result, and its failure is occasional. The high-speed pure rolling bearing with this new structure we designed and produced does not have a cage, so there are no destructive factors in the original structure design and production of the bearing. Therefore, the high-speed train bearing designed and produced based on its basic principle is safe and reliable in the application of high-speed trains. It was accidental that it happened, but if it didn't happen, it was inevitable. So this new type of high-speed train bearing not only has fast speed, large load capacity, good safety and reliability, low noise, good vibration resistance, low energy consumption, less maintenance, long service life, and good universal performance, but also will replace imported bearings in the production and application of high-speed train bearings, making it an inevitable result for China's high-speed trains to operate better. This new type of high-speed train bearing has achieved good results in terms of its brand-new theory, design, process, production, testing, and practical use in harsh environments. After more than ten years of unremitting efforts, high-speed pure rolling bearings have quickly demonstrated their excellent quality and performance in practical applications in multiple industries. Its products have entered the stage of mass production, and this new type of bearing will be understood and recognized by more and more people over time. The new bearing equipment, which has undergone strict production, testing, and practical testing, is not far from being used and applied on our domestically produced high-speed trains. 2、 Application on high-speed trains: 1. High speed trains: fully utilize the power performance of locomotives to make trains faster. 2. Multiple unit trains: greatly improve safety, reliability, and maneuverability. 3. Magnetic levitation trains: significantly reduce vibration, make driving smoother, and significantly reduce noise. 4. High speed trains: increase load capacity, low driving noise, long service life, and less maintenance. 5. Subway trains: safety Stable, reliable, comfortable, and low energy consumption. Application on high-speed train power mechanism and other equipment. Application on high-speed train power mechanism and other equipment. 1. Application on locomotive power unit. 2. Application on locomotive transmission mechanism. 3. Application on locomotive transmission mechanism. 4. Application on other transmission and transmission systems of locomotives We can scientifically draw the following conclusion from the application of rotating mechanisms: the production and application of new high-speed pure rolling bearings for high-speed train bearings will not be far off, and it will make due contributions to the safe operation, high-speed, and heavy-duty operation of high-speed trains in China. Who dominates the fate of high-speed rail? With the development of society, the convenience of people's travel is also a topic of concern and annoyance. Convenient tools have emerged as a result. High speed railway is a good choice. High speed railway refers to a railway system that achieves an operating speed of over 200 kilometers per hour by renovating existing lines (linearization, gauge standardization), or specifically constructing new "high-speed new lines" to achieve an operating speed of over 250 kilometers per hour. In addition to meeting a certain speed standard during train operation, high-speed railways require cooperation and improvement in vehicles, tracks, and operations. The broad definition of high-speed railways includes high-speed rail transportation systems using magnetic levitation technology. However, after in-depth investigation, it was found that the so-called high-speed rail concept stocks are purely speculative and may not be able to produce high-speed rail parts in the coming years. On the contrary, those railway infrastructure stocks will undoubtedly benefit from the railway development. Greatly improved 3. Magnetic levitation trains: significantly reduced vibration, smoother operation, significantly reduced noise. 4. Fast trains: increased load capacity, low operating noise, long service life, and less maintenance.