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Introduction of cooling fan bearings: analysis of advantages

Introduction of cooling fan bearings: analysis of advantages and disadvantages of different 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 following cooling fan manufacturer——Ruiapple Electronics will give you a detailed introduction:
 
Oil bearing:
 
When the traditional brushless DC fan motor is designed, the fan blades rotate) and its shaft core passes through an oil-impregnated bearing, called SLEEVE bearing for short, and is pivotally fixed at the center of the motor stator to maintain a proper gap between the rotor and the stator. Of course There must also 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 induced magnetic lines of force between the rotor and the stator, and The control of the drive circuit makes 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.
 
Introduction of cooling fan bearings: analysis of advantages and disadvantages of different bearings
 
Advantages of oil bearing:
 
1. Resistant to impact from external forces and less damage during transportation;
 
2. The price is cheap. Compared with ball bearings, the price is very different.
 
Disadvantages of oil bearing:
 
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.
 
2. The inner diameter of the bearing is easy to wear and has a short service life.
 
3. Cannot be used on portable products.
 
4. The gap between the bearing and the shaft core is small, and the activation effect of the motor is poor.
 
Ball bearing:
 
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 the spring supports the metal ring outside the BALLBearing, so that the weight of the entire fan blade rotor sits on the ball bearing and is indirectly supported by the spring, so it can be used in different directions , Angle portable products, but still need to prevent falling to avoid damage to the ball bearings, which may cause noise and reduce service life.
 
Advantages of using ball bearings
 
1. The metal bead movement belongs to point contact, so it is easy to activate the movement.
 
2. It can be used for portable products that are often operated at different placement angles and directions.
 
3. Longer service life than oil bearing.
 
Disadvantages of ball bearings
 
1. The bearing structure is quite fragile and cannot withstand the impact of external forces.
 
2. When the motor rotates, the rolling of the metal ball will generate louder noise.
 
3. The price is high and cannot compete with oil-impregnated bearings in cost price.
 
4. The source and quantity requirements of ball bearings are not easy to control.
 
5. The ball bearing uses the elasticity of the spring to position it, making it difficult to assemble.