In order to maintain the bearings have been the performance in good condition as long as possible, to be the maintenance, overhaul, in order to accident prevention in the first place, to ensure the reliability of operation, improve productivity and economy. Maintenance best corresponding mechanical operating conditions, operating standards, on a regular basis. The surveillance operation, to supplement or replace the lubricant, the inspection of the regular demolition. As maintenance issues in the operation, the bearing of the rotating sound, vibration, temperature, lubricant status and so on.
nsk bearing cleaning: demolition bearing overhaul, the first record bearing the appearance, make sure the residual amount of the lubricant, the sampling check with the lubricant, wash bearings. As a cleaning agent, ordinary gasoline, kerosene.
Remove the cleaning of the bearing to the points of rough cleaning and fine cleaning, respectively, on the container, first put the bottom of the metal net, bearing no direct contact with the dirt of the container. Coarse cleaning, if the bearing rotation with dirt, will damage the bearing rolling surface, it should be noted. Coarse cleaning oil, use a brush to remove to grease, adhesive material, and generally clean, and transferred to the sperm washing.
Sperm washing is the bearing side of the rotating cleaning oil, while careful cleaning. In addition, cleaning the oil should be kept clean.
fag bearing maintenance and judgment: in order to judge removed bearing can use to check in the bearing clean. Check the raceway, the raceway, with the state of the surface wear of the cage, the bearing clearance increases and nothing to do with dimensional accuracy to drop damage, abnormal. Non-separation of small ball bearings, with one hand to the inner level of support, rotating outer ring to confirm smooth.
Tapered roller bearings and other separation shaped bearings, rolling element, the outer ring raceway surface were examined.
Large bearing hand rotation, pay attention to check the rolling element and raceway, cage, rib surface appearance of the importance of bearing the higher the greater the need for careful examination.
The purpose of the ina bearing lubrication:
Lubrication of rolling bearings to reduce bearing internal friction and wear, to prevent burning stick, its lubrication utility as follows.
(1), to reduce friction and wear.
Constitute the bearing rings, rolling element and to maintain contact with each other part, to prevent the metal contact, reducing friction, wear and tear.
(2) to extend the fatigue life.
ntn rolling bearing fatigue life, in the rotation, the rolling contact surfaces oiled, will be extended. On the contrary, the low oil viscosity, the thickness of the lubricant film is not good, is shortened.
(3), discharge of frictional heat, cooling.
Cycle oil law and other oil discharge occurred by friction heat, the heat coming from the external cooling. Prevent bearing overheating and to prevent the lubricant itself aging.
(4), other
Prevent the intrusion of foreign matter inside the bearing, or to prevent rust and corrosion. Lubrication methods:
Bearing lubrication methods, divided into the grease and oil lubrication. To the bearing play function, first select the appropriate conditions of use, the purpose of lubrication method. If there is only a lubrication, oil lubrication lubrication dominant. However, the grease lubrication expertise can simplify the bearing of surrounding structures, the pros and cons of grease and oil lubrication.
bearing installation nachi:
Bearing installation is correct, and affect the accuracy, longevity, and performance. Therefore, the design and assembly department for bearing installation. I hope to be installed in accordance with the operating standards. Operating standards of the project is usually as follows:
(1), cleaning bearings and related parts;
(2), check the connected components of size and finishing;
(3), installation;
(4), install the bearing inspection;
(5), the supply of lubricant.
I hope to be installed, just open the bearing packing. General grease lubrication, cleaning, directly populate grease. Lubricating oil, general do not have to clean,, apparatus, or high-speed bearings, use a clean wash of oil, remove the coating on the bearing rust inhibitor. Remove the bearing of a rust inhibitor, rust, and so can not be placed regardless. Furthermore, the enclosure grease the bearings, not washing directly.
timken bearing installation bearing structure, with different conditions, general, due to multi-axis rotation, the inner ring needs interference fit. Cylindrical bore bearings, multi-press pressure in, or more hot charging method. The occasion of the tapered bore mounted directly on the taper of the shaft, or sleeve installation.
Installed on the shell, the general clearance with more than outer ring of the amount of interference, usually pressed into the press, or installed after cooling the shrink fit. Coolant with dry ice to expand and contract with the installation of the occasion, the moisture in the air will condense on the surface of the bearing. Therefore, the appropriate anti-rust measures.