The correct installation of self-aligning roller bearing bearings affects the accuracy, life, and performance. Therefore, the design and assembly department should fully study the installation of thrust spherical roller bearings. You want to install according to the operating standards. The standard of work is usually as follows:
(1) Check the size of the associated parts and the finish processing;
(2) Installation;
(3) Supply lubricant.
(4) Cleaning of bearings and associated parts of bearings;
(5) Inspection after installation of bearings.
I hope to open the self-aligning roller bearing bearing package just before installation. Lubricating
oil is lubricated. Normally it does not need to be cleaned. However,
bearings used in instruments or high speeds should be cleaned with clean
oil and the rust inhibitor applied to the bearing should be removed. General grease lubrication, do not clean, directly filled with grease. In addition, bearings that have been sealed with grease are used without cleaning. The rust-removing bearing is removed and it is easy to rust, so it cannot be left unattended. When
it is mounted to the housing, generally there is more clearance fit and
the outer ring has an amount of interference. Usually, it is
press-fitted with a press, or there is also a shrink-fitting method that
is installed after cooling. When
dry ice is used as the coolant and the shrink-fit installation is
installed, the moisture in the air will condense on the surface of the
thrust spherical roller bearings. Therefore, proper rust prevention measures are needed.
After
entering the stage of operation, the spherical roller bearing's
vibration and noise begin to increase, and sometimes a strange sound
occurs. However, the vibration increases slowly. At this time, the
bearing kurtosis value suddenly reaches a certain value. We believe that at this time, the bearing showed an initial failure.
At this time, the self-aligning roller bearing is required to be closely monitored and closely monitored for changes. Since
then, the bearing kurtosis value has begun to drop rapidly, and is
close to normal, and vibration and noise begin to increase
significantly, and its increase rate begins to accelerate. When the
vibration exceeds the vibration standard (such as ISO2372 standard), the
bearing kurtosis value also begins Rapid increase, when exceeding the vibration standard, and the
kurtosis value exceeds the normal value (usable kurtosis relative
standard), we believe that the bearing has entered the late stage
production, need to repair equipment in time, replace the bearing.
Bearings
exhibit late failure characteristics to severe failures (usually
bearing damage such as shafts, burns, sand spalling, raceways, bead
wear, etc.) The time does not exceed one week, and the greater the
capacity of the equipment, the faster the speed. The shorter the interval. Therefore,
in the actual bearing fault diagnosis, once the late fault
characteristics are found, it should be decisively judged that the
thrust spherical roller bearings have faults and repairs are scheduled
as soon as possible.
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