Introduction of cooling fan bearings

Different functions and types of cooling fans, the bearings used by the fans are different? What are the main bearings of the cooling fan, and what are the advantages and disadvantages of different bearings? The editor of Tongchi Automobile will give you a detailed introduction: u003cbru003e u003cbru003e u003cbru003e Oil bearing: u003cbru003e u003cbru003e u003cbru003e When the traditional brushless DC fan motor is designed, the fan blades rotate) and its shaft core passes through an oil-impregnated bearing, referred to as SLEEVE bearing, which is pivotally fixed at the center of the stator of the motor to maintain a proper balance Clearance, of course, there must be a gap between the shaft core and the bearing, so that the shaft core will not be deadlocked and unable to operate; and the stator structure of the motor is referred to as the stator. After the power is input, there will be induction between the rotor and the stator. The lines of magnetic force and the control of the drive circuit make the fan motor run. Therefore, the traditional fan motor architecture has only one fan rotor, one motor stator and one drive circuit, and the shaft core and the bearing are pivotally connected to operate with the induction of the magnetic field. u003cbru003e u003cbru003e u003cbru003e Advantages of oil bearing: u003cbru003e u003cbru003e u003cbru003e 1. It is resistant to external impact and causes less damage during transportation; u003cbru003e u003cbru003e u003cbru003e 2. The price is cheap. Compared with ball bearings, the price is very different. u003cbru003e u003cbru003e u003cbru003e Disadvantages of oil bearing: u003cbru003e u003cbru003e u003cbru003e 1. Dust in the air will be sucked into the core of the motor due to the operation of the fan motor, and mixed with the lubricating oil stored around the bearing to form sludge, causing noise during operation and even stuck. u003cbru003e u003cbru003e u003cbru003e 2. The inner diameter of the bearing is easy to wear and has a short service life. u003cbru003e u003cbru003e u003cbru003e 3. Cannot be used on portable products. u003cbru003e u003cbru003e u003cbru003e 4. The gap between the bearing and the shaft core is small, and the activation effect of the motor is poor. u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e Ball bearing: u003cbru003e u003cbru003e u003cbru003e Ball bearings are operated with round metal balls, which belong to point contact, so it is easy to activate the operation. In addition, the ball bearing is used in conjunction with the spring, so that the weight of the entire fan blade rotor sits on the ball bearing and is indirectly supported by the spring. Therefore, it can be used for portable products in different directions and angles, but it is still necessary to prevent Drop it, so as not to damage the ball bearing and cause noise and reduce the service life. u003cbru003e u003cbru003e u003cbru003e The advantages of using ball bearings u003cbru003e u003cbru003e u003cbru003e 1. The metal ball operation belongs to point contact, so it is easy to activate the operation. u003cbru003e u003cbru003e u003cbru003e 2. It can be used for portable products that are often operated at different angles and directions. u003cbru003e u003cbru003e u003cbru003e 3. Longer service life than oil-impregnated bearings. u003cbru003e u003cbru003e u003cbru003e Disadvantages of ball bearings u003cbru003e u003cbru003e u003cbru003e 1. The bearing structure is quite fragile and cannot withstand the impact of external forces. u003cbru003e u003cbru003e u003cbru003e 2. When the motor rotates, the rolling of the metal ball will produce louder noise. u003cbru003e u003cbru003e u003cbru003e 3. The price is high, unable to compete with oil bearing in cost price. u003cbru003e u003cbru003e u003cbru003e 4. The source and quantity requirements of ball bearings are not easy to control. u003cbru003e u003cbru003e u003cbru003e 5. The ball bearing uses the elasticity of the spring to position it, making it difficult to assemble. u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e When choosing a cooling fan bearing, you can choose according to your product and the characteristics of the fan. Whether it is a DC cooling fan or an AC cooling fan, the bearing is different. If you don't know how to choose, please contact Tong Chi Auto, as the leader of China's cooling fan, Tong Chi Auto can provide the best cooling solution for your products.