By converting energy, namely electric energy, electromagnetic energy, mechanical energy, and kinetic energy, the computer fan is made possible. The usage of the circuit will affect how well the fan performs. The circuit concept may typically be separated into several kinds. One of the factors among them that influences its energy conversion is speed. The bearing mechanism of the computer fan will then be explained to you by Jiance Computer fan.
Fan bearing system for a computer:
Bearing system of Computer fan:
It is generally recommended to select ball bearings for the bearing system of the fan, because the life of the Computer fan usually depends on the reliability of its bearings, and the ball bearing system has been proved to have the characteristics of high efficiency and low heat generation. Ball bearings belong to rolling friction, consisting of metal balls rolling, with small contact surfaces and low friction coefficient; The oil-bearing is Sliding friction, with large contact surface. After long-term use, the oil will volatilize, the bearing is easy to wear, with large friction coefficient, large noise and short service life. In addition to large ventilation capacity and high air pressure, the reliability of high-quality fans is also very important, and the bearing form used in the fan is very important here.
High speed fans all use ball bearings, while low speed fans use low-cost oil bearing Sleevebearing. Oil bearing fan only uses one bearing; Both ball bearing fans require two bearings, a single ball bearing, which is "1Ball+1Sleeve" and still contains oil bearing components. More advanced than single ball bearings are double ball bearings, also known as TwoBalls. The service life of oil bearing is generally 10000 hours, 30000 hours for single ball bearing, and 50000 hours or more for double ball bearing (when the ambient temperature is set below 25 ℃)
The oil bearing used in the fan is sintered from copper based powder, and lubricating oil needs to be added to reduce sliding friction when using oil bearing. The lubricating oil is modulated from lithium based grease and special engine oil. With prolonged operation, the oil inside the bearings will evaporate and become dry, the friction coefficient will increase, and the fan operation may be affected, resulting in abnormal noise, slow speed, or even no rotation. However, the ball bearing replaces Sliding friction by rolling friction. The friction coefficient is small and overcomes the shortcoming that the friction coefficient is easy to change. Therefore, the ball bearing has strong operation stability and relatively long service life.
