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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Rolling bearing device and application of common problems? Rolling bearing assembly and application of common problems?
First, the requirements for the appearance of the device and the location of the device if there are foreign objects such as iron filings, burrs, dust, etc. in the bearing; the noise and oscillation will occur during the operation of the bearing; even the raceway and the rolling body will be damaged. Therefore; before the bearing of the device; It is necessary to ensure the sanitation of the appearance of the device and the environment of the device. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Second, it is necessary to remove the bearing surface before the bearing device is coated with anti-rust oil; you need to use hygienic gasoline or fire oil to carefully remove; then apply clean high-quality or high-speed high-temperature smooth grease to use the device. Hygiene to bearing life The effect of the number and oscillation noise is very large. But we have to be uniquely reminded that the fully enclosed bearings do not need to be refueled.
Third, the smooth selection of smooth grease has a very important impact on the operation and life of the bearing; here is a general guideline for the analysis of the selection of smooth grease. Smooth grease is made of base oil, thickener and additives; different varieties The smooth grease function of different trademarks of the same variety is very different; the rotation limit of the promise is different; it is necessary to pay attention to the selection. The function of smooth grease is mainly determined by the base oil; usually the low viscosity base oil is suitable for low temperature and high speed; High viscosity for high temperature, high load. Thickener is also related to smooth function; water resistance of thickener to determine the water resistance of smooth grease. Guidelines; different brands of smooth grease can not be mixed; and; even the same species The smoothing grease of the thickener; it will also have a bad influence on each other due to the different additives.
Fourth, when the grease is added to the smooth bearing; the more grease is applied, the better; this is a common fault concept. Excessive grease in the bearing and bearing chamber will form excessive mixing of grease; then extremely high temperature occurs. Bearing filling is smooth. The amount of the agent should be 1/2 to 1/3 of the inner space of the bearing; the speed should be reduced to 1/3 at high speed.
5. When the bearing device and the disassembly device are not hammered directly on the bearing end face and the non-stressed surface; the bearing should be evenly stressed by the clamp, sleeve or other device; do not pass the tumbler transmission device. Apply a smooth oil to the outside; it will make the device smoother. If the cooperation is too big, the bearing should be placed in mineral oil and heated to 80~90 °C to hurry up; strictly control the oil temperature does not exceed 100 °C; to avoid tempering The effect hardness decreases and affects the scale recovery. When it is difficult to disassemble; it is recommended that you use the unpacking and pulling outwards to carefully spray the hot oil on the inner ring; the heat will make the inner ring of the bearing swell; then make it It is easier to drop.
Sixth, the selection of bearing radial clearance is not the minimum required job clearance for all bearings; you need to choose the appropriate clearance according to the conditions. GB 4604-93; rolling bearing radial clearance is divided into five groups -2 Groups, 0 groups, 3 groups, 4 groups, 5 groups; the clearance values ​​are sequentially from small to large; during this period, group 0 is the normative clearance. The radical radial clearance group is suitable for common working conditions, conventional temperatures and common For interference cooperation, bearings with special conditions such as high temperature, high speed, low noise and low friction should be used with large radial clearance. For radial bearings and bearings for machine tool spindles, small radial clearance should be used. Regarding the roller bearing, it is possible to adhere to a small amount of work clearance. Others; there is no such thing as a clearance for the bearing of the separate type, and finally; the working clearance after the bearing is installed; it is more than the original clearance before the device. The mother-in-law is still changing her brother-in-law.
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Source: China Bearing Network Time: 2018-05-20