According to foreign media reports, NSK Ltd. has developed a new type of ultra-high-speed bearings for pure electric vehicles, hybrid electric vehicles and other new energy vehicles. This new bearing allows the motor to run at a higher speed, improve fuel economy (reducing power consumption per unit distance), increase the maximum cruising range of the vehicle, and help improve user comfort. Seiko Co., Ltd.'s goal is that by 2030, its new bearing sales will reach 10 billion yen (about 657 million yuan).
1. R & D background
Protecting the environment is critical to the continued prosperity of society around the world. In order to improve sustainability, the automotive industry is rapidly expanding the development and production of electric vehicles, hybrid vehicles, and other new energy vehicles. However, the cruising range of such vehicles is still a problem that consumers are very concerned about, and there is a huge demand for larger capacity battery packs and / or higher efficiency. Consumers hope that when buying electric vehicles and other new energy vehicles More flexibility and peace of mind.
Considering such demands, automakers are developing smaller and lighter auto parts, motors with faster speeds, higher output power, and higher operating efficiency. Therefore, the bearings used in power systems, especially motors, need to meet higher and higher speed and performance requirements.
During high-speed operation, due to high temperature, bearing rotation may cause grease degradation, resulting in bearing seizure / failure. Moreover, high-speed operation will cause the bearing cover to be deformed or damaged due to centrifugal force.
2. Product features
Proprietary Seiko grease provides superior seizure resistance
The new bearing is filled with a special precision grease, which can reduce the high temperature generated by the bearing at high speed and extend the life of the grease and bearing. At the same time, compared with traditional bearings, it reduces the risk of seizure.
Newly developed bearing cover
A. The fixing piece is thinner (lighter), thereby reducing the deformation or damage of the bearing cover due to centrifugal force;
B. The bearing cover foundation (pillar) has high rigidity, which can prevent deformation of the bearing cover when the bearing is running at high speed;
C. The new design can greatly reduce the deformation of the bearing cover during high-speed operation of the bearing, and allow the bearing cover to have a long life.
The newly developed bearing cover material-high rigidity bearing cover resin
A. The resin has high rigidity and heat resistance, which reduces the deformation of the bearing cover when the bearing is running at high speed;
B. High rigidity can reduce the effect of centrifugal force, thereby reducing the deformation of the bearing cover during high-speed operation.
3. Has excellent performance
The proprietary Seiko grease and the newly developed bearing cover can be operated when the dmN value of the bearing is equal to 1.4 million (that is, a bearing with a diameter of 35 mm can rotate 30,000 times per second).
4. Benefits available to customers
The latest bearings developed by Seiko Co., Ltd. allow automobile motors to reach the maximum operating speed, allowing customers to develop motors with significantly improved operating speeds. Higher motor output can help improve fuel economy (reducing power consumption per unit distance), increase the maximum cruising range of the vehicle, and help improve user comfort.
Faster speeds also allow the use of smaller motors, reducing vehicle weight, increasing space to accommodate other components, allowing more batteries to be installed, or allowing more space in the car.
Seiko Co., Ltd. is also developing more advanced technologies. It is expected that by the end of 2020, the dmN value of bearings will reach 1.6 million.
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