Double ball cooling fan fan diagram

Fan parameters of double ball cooling fan

Fan curve diagram of double ball cooling fan

Appearance drawing of double ball cooling fan

Double ball cooling fan fan cleaning tips

Since the fan has not been cleaned for a long time, a lot of dust is also deposited on the outside. The author first made a simple cleaning of the outside of the fan. Now let's disassemble the fan. There are two small screws on the fan. Unscrew them, and the side near the air outlet will be loose. Gently break open the metal buckle of the fan, and the cover on one side of the fan can be opened. Be careful not to break the buckle too far, so as not to lose its elasticity, and it will not be tightly locked when it is put back. When the fan is turned on, the inside of the fan is also terrible. All kinds of dense dust, especially on the fan blades of the fan, have accumulated a thick layer. After simply brushing the floating and sinking with a brush, I suggest that you wipe the fan blades carefully with a paper towel or cotton cloth dipped in water. It is best not to use some organic solvents, because it will easily cause the fan blades to be compatible with them, and bake at high temperature. It is easier to make the fan blades brittle and accelerate aging, and it is more reliable to use water. After careful and patient cleaning, the fan looks brand new. After adding a drop of lubricating oil to the central shaft of the fan, use the method of disassembly before and then reassemble it again. Even the fan part is cleaned up.

 

Bearing system for double ball cooling fan fan

The fan bearing system generally recommends the best choice of ball bearings, because the life of the fan heat fan usually depends on the reliability of its bearings, and the ball bearing system has been proven to have the characteristics of high efficiency and low heat generation. Ball bearings are rolling friction, rolling by metal balls, with a small contact surface and a small friction coefficient; while oil-impregnated bearings are sliding friction, with a large contact surface. After long-term use, the oil will volatilize, the bearing is easy to wear, the friction coefficient is large, and the later noise is large. , short lifespan. In addition to the large ventilation volume and high wind pressure, the reliability of a good-quality fan is also very important. The bearing form used by the fan is very important here. High-speed fans all use ball bearings (Ball bearings) while low-speed fans use low-cost oil-impregnated bearings (Sleeve bearings). Oil bearing fans only use one bearing; ball bearing fans require two bearings, single ball bearing, which is "1 Ball + 1 Sleeve", still with oil bearing components. Higher ji than single ball is double ball bearing, namely Two Balls. The oil bearing life is generally 10,000 hours, the single ball bearing is 30,000 hours, and the double ball bearing is more than 50,000 hours (when the ambient temperature is set below 25 ℃). The oil-impregnated bearing used by the fan is sintered from copper-based powder. When using the oil-impregnated bearing, lubricating oil is required to reduce the sliding friction. The lubricating oil is prepared from lithium-based grease and special oil. With long-term operation, the oil in the bearing will volatilize and dry out, the friction coefficient will increase, and the operation of the fan will be affected. The ball bearing replaces the sliding friction by rolling friction, and the friction coefficient is small and overcomes the shortcomings of the easy change of the friction coefficient, so the operation stability is strong and the service life is relatively much longer.

 

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