Fan bearing and bearing preloading skills

Source: China Bearing Network Time: 2018-02-21

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In the computer cooling fan; the reliability of the fan bearing system determines the service life of the cooling fan and its noise and stability. According to the fan bearing classification; there are usually two types of air-cooled radiators: oil-bearing bearing fans and ball bearing fans. The cost is low; but the oil bearing is sliding friction; the contact surface is large; after long-term use; the lubricating oil evaporates; the bearing is easy to wear; the friction coefficient is large; the noise is large in the later stage; the life is short; and the ball bearing is tumble friction; Low heat generation characteristics; its friction coefficient. ãƒ‹é¸¬ stop ash å€œ å€œ æ„ ã” æ„ ã” æ„ ã” æ„ ã” ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Needed; the ball fan gradually became the choice of the computer cooling fan at that time.
In the bearing manufacturing process; the primary link affecting its quality is steel ball production, oil selection, removal in the production process, aerospace industrial grade stainless steel data application and fine installation. For the fan small motor bearing; The current domestically produced bearings are limited to the skill reasons; they are still not satisfied with the quality requirements of high-speed, high-function electric fans; the functions of all aspects of the products are not perfect. Even some domestic illegal manufacturers; often use the cost and function of used bearings The same low quality so-called ball fans; severely infringed on the broad consumer rights.
Only outside viewing; high-quality bearings and shoddy bearings are not significant; but the skill content is incomparable between the two. Take the bearing preload as an example; domestic manufacturers and international brands in the processing process has been significant The skill difference. Preloading refers to the process of fixing the ball into the bearing sleeve; this requires the ball to be closely connected with the bearing sleeve; there is no gap; so that the steel ball wear degree is minimal. Usually in the domestic manufacturer bearing production; before pre-pressing The upper and lower bearing sleeves are correct; there must be a certain error due to the size of the steel ball and the size of the bearing sleeve; therefore, after the preloading force, there is always a gap of 5-10 microns between the ball and the bearing sleeve; this is the gap; The degree of aging wear is greatly increased; the service life is shortened. The same process; in the bearing manufacturing of NSK company; the upper and lower bearing sleeves will have a relative spacing of about 5 microns during preloading; thus the bearing sleeve will be tight after being pressed. Stuck the ball; reduce the gap between them to zero; in the operation of the fan; the ball will not jump; thus reducing the wear to the most .
Produce the best electric fan; of course, we must choose the best bearing. As the famous radiator brand in China; Shenzhou Fengshen computer radiator is strictly demanded from the beginning of the market; high-quality original data application to ensure the high functionality of the product. For the high-temperature aging test of all kinds of bearings of different types of bearings, the test is preferred; as early as 1999; Shenzhou Fengshen has officially concluded the import cooperation relationship with NSK, the world's largest fine bearing manufacturer. At present; Shenzhou Fengshen series computer radiator products use NSK imported ball bearings; fundamentally ensure the quality of the fan.

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