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Key skills in bearing production (2)
Source: Bearing network time: 2014-09-29
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The resistance to the rotation of the rolling bearing consists of tumbling friction, sliding friction and smoothing friction. When the tumbling body rolls over the raceway, it will exhibit tumbling friction. The sliding friction is presented on the guiding surface of the tumbling body in the cage and the rib of the cage. On the guide surface and in the roller bearing, the roller end face and the ferrule rib. The smoothing agent friction is composed of the internal friction of the smoothing agent at the touch and the stirring and kneading of the smoothing agent. The total friction of the set of bearings is tumbling. The sum of friction, sliding friction and smoothing friction is the resistance of the impedance bearing movement. The mission of studying smoothing skills is to develop different smooth grease (oil) and its smooth method; the bearing resistance is the most.
Domestic and international development trends in leading industrial countries; bearing smooth grease (oil) under common working conditions; skills and production have been completely cleared; has formed a series of types and mass production capacity; the primary trend at that time was to study progress in some special cases smooth The function of fat; if it is studying the vacuum stability of perfluoroether smooth grease for advanced aerospace; creeping and viscosity-temperature function, such as low-temperature grease; although it has a good effect in application; but its smooth mechanism is not A very good theoretical discussion. Another example; to discuss the use of gaseous smoothing agents at high temperatures (200-4000C). The mission of smooth bearing in China at that time was extremely heavy; if the funds agreed, the following issues should be dealt with: Improve the service life of the existing sealed bearing smooth grease in normal temperature environment, second; improve the low-noise bearing smooth grease oscillation function, the third; discuss the development of new types of bearing smooth grease under common working conditions; fill the domestic blank.
The main discussion content and policy are based on the distance between China's bearing smooth grease and foreign countries; the content and guidelines for smooth grease in the next ten years are: to discuss the method of improving the smooth grease life; for sealed bearings for household appliances (such as washing machines, vacuum cleaners, computers, Air conditioners, etc.) and it is difficult to repair or disassemble sealed bearings (fine machine tool spindles, fine external shafts, deep water working machinery transmission systems, etc.) that constitute damage to the running accuracy; the smooth grease life used is equivalent to the mechanical life. Discuss the smooth noise reduction of the grease; make the low noise bearing (v3/z3, v4/z4, etc.) get the noise reduction value of 3-5dB or more, and research and develop 15-20 new types of smooth grease; constitute the basis of the series of bearing smooth grease in China Format: about 8-10 kinds of high temperature, normal temperature, low temperature, etc.; usually medium or very high level of motor bearing smooth grease 5-8 types and 5-8 kinds of bearing smooth grease under special working conditions such as space sail sea.
Sealing skills and skills summary of the newly developed rolling bearing; the corresponding sealing equipment is installed on both end faces. Its function is to ensure that the smooth grease (oil) inside the bearing will not be lost in operation; ensure that the bearing is in a smooth condition, another The aspect is to protect the bearing; so that the dust and harmful gases from the outside will not enter the bearing cavity; avoid damage to the bearing. Commonly there are rubber or engineering plastic sealing ring; there are also steel plate sealing ring (or dust cover). There are many kinds of sealing layouts; the sealing function is different. There is a gap between the sealing ring and the bearing; it is called non-touch sealing; the more the gap is, the more the rubber is, the bad city is screaming.岢 湮藜湎 湮藜湎 模 怀 怀 怀 怀 哟ナ 哟ナ 哟ナ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ 芊馊哟ゴ . . . . . . . . . . . . . . . . . Corresponding sealing equipment under working conditions; and the compatibility of the sealing ring material with the corresponding smooth grease.
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