PRLog (Press Release) – Jan 09, 2011 – Laptop CPU Fan bearings and lubrication introduced Basic term is introduced.

The rolling bearing and sliding bearing

Laptop CPU Fan use of rolling bearing with two dust cover, inside filling grease.

Also can call bushings, sheath, etc. Laptop CPU Fan motors use of sliding bearings, is the copper alloy, have certain self-lubricating function, but absolutely need lubricant.

According to experience, two kinds of bearings are fan in use. Older notebook, such as T23, 600 series of fan is using rolling bearing, Some, such as new T4X, using collar. Need explanation is, rolling bearings either from what Angle measure, such as life, noise, start torque, high speed ability, or cost, were far above the collar. Of course bushings also has its advantages, besides cheap, radial dimensions can be very small.

Lubricating oil and grease

Lubricant, commonly known as "oil", "thin oil", including mineral oil niv oil. Sewing machine oil, horologe oil belong to lubricating oil. Transformer oil, rape oil, etc are not included.

Grease, commonly known as "butter", "dry oil", which in essence is a lubricant + thickener + (additive) mixture. Grease lubrication or lubricating oil. Thickener has two kinds: it is a metal matrix, such as lithium base, calcium base; And composite foundation thickener, such as lithium, urea composite foundation and so on, it is the role of "maintain" in bearing grease.

Oil has many parameters, such as the viscosity and temperature range, lubricating oil, grease can species, so the lubricating oil according to using and thickener species, viscosity parameters such as to call.
However, because no unified within the industry, called the name is various, be like the most commonly used 2 lithium base fat refers to the viscosity is 2, using lithium base thickener grease.

The lubrication

Specifically, computer fan bearing, as well as most everyone see bearing grease lubrication, is used to. Grease filling in the rolling bearing between two dust cover, or collar on both ends of the sealing between. Lubricant or rape oil can lubricate role, but can't keep long in bearing.

Bearing again lubrication

Laptop CPU Fan of rolling bearing could hardly be lubrication. Because of the dust cover is difficult to open -- even with strongmen opened, also hard to ensure no deformation. Deformation, pack not to turn back.
For rolling bearing "add" "thin oil" will bring the bearings have only a little oil also diluted drop, then quickly lost. To get, and replace the correct types of rolling bearings XD, suggest changed directly, rolling bearing life is very long, many advantages.

Bushings can add after cleanness oil - from this point, seem to be used bushings convenient practical ability of black friend. In the process of lubrication again clean, the heaviest if and keep the seals intact.
Similarly, thin oil can no longer remain within the collar, dilute the original grease.

Laptop CPU Fan conditions of application is more onefold, oil was a simple choice. Considering temperature, life and noise is enough.
According to experience, fan bearing temperature of about 25 ~ 80 degrees Celsius, belongs to the temperature. General 2 lithium base fat can long-term in long-term work within 100 degrees. So, the high quality 2 lithium base fat is can satisfy the requirement. But, experiments showed that the oil temperature higher grades, life is long, in allowing temperature range, operation temperature rise 15 degrees, grease every life is halved. Considering the disassembling once not easy, dosage and so small, recommend conditional XD can use synthetic oils. Namely, synthetic lubricants + composite thickener, and do not contain any additives of grease. The grease in 150 degrees, heat-resistant usually life was thirty times above. Each big oil companies producing synthetic oils. But some used for special purposes, do not apply. Personal recommend a synthetic oils + double base thickener urea grease.

High quality oil is uniform and adhesion is very good, and the invisible any grain, see below. Color and performance is irrelevant. Synthetic oils to some more transparent. Looks like containing powder, or some can pull a long wire, but not too ZhanShou, for inferior oil.

High-quality lithium base fat

Several problems of discussion

In Laptop CPU Fan , grease itself noise can be basic consideration, good lubrication sleeves, no matter use what grease, noise are sufficient to satisfy a requirement. Black We heard the noise, mainly bearing bad lubrication or impurity is caused, other reasons and bearing wear, fan blades deformation, draught finish insufficiency, the fan base fixed, improper motor shaft skid etc reasons. To add oil, bearing can only solve fundamentally lubrication problem, also have solved the problem of noise arising from, and greatly extend bearing life. Add various thin oil can be short of time, temporary solution lubrication problem.

Additives used in certain extreme conditions, can play a big role, such as extreme pressure additives, wear-resisting. However, the copper alloy additive has strong corrosive action, and if use undeserved, greatly reduce bearing life. Here, recommend not contain any additives of grease.

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