IKO
bearing vibration damage to the bearing is very sensitive, such as
peeling, indentation, corrosion, cracks, wear and so will be reflected
in the bearing vibration measurement, therefore, through the use of a
special IKO bearing vibration measuring instrument (frequency analyzer,
etc.) The size of the vibration, through the frequency of points can not be extrapolated to the specific circumstances. The measured values vary depending on bearing conditions or
sensor installation location, etc. Therefore, the measured values of
each machine must be analyzed and compared beforehand to determine the
judgment criteria.
IKO bearing temperature, the general temperature outside the
bearing chamber can be speculated that if the use of oil hole can be
measured directly outside the bearing outer ring temperature is more
appropriate.
Normally,
the temperature of IKO bearings gradually increases with the start of
bearing operation and reaches a steady state after 1-2 hours. IKO bearings normal temperature due to the heat capacity of the machine, heat dissipation, speed and load and different. If the lubrication, the Ministry of installation, IKO bearing
temperature will rise sharply, there will be abnormal high temperature,
then you must stop running, take the necessary precautionary measures.
The use of thermal sensors can monitor the working temperature of
IKO bearings at any time, and to achieve automatic temperature alarm
exceeds the specified value or stop to prevent combustion shaft
accident.
With high temperature often said IKO bearings have been in an abnormal situation. High temperature is also harmful to the bearing lubricant. Sometimes IKO bearings can be attributed to bearing overheating lubricant. If the bearing temperature exceeds 125 ℃ for a long time will even reduce IKO bearing life. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. Containing impurities, the load is too large, bearing ring, lack of
clearance, and high friction generated by the oil seal and so on.
Therefore,
the continuous monitoring of IKO bearing temperature is necessary,
whether it is measuring the IKO bearings or other important parts. If the operating conditions remain unchanged, any temperature change may indicate that a fault has occurred.
After the installation of IKO bearings, in order to check the installation is correct, to carry out the operation check. Small machinery can be rotated by hand to confirm whether the rotation is smooth. Check
the project due to foreign body, scars, indentation caused by poor
operation, due to poor installation, the mounting base processing
instability caused by the instability of the torque, due to clearance is
too small, installation error, sealing friction caused by excessive
torque Wait. If there is no abnormality you can start the power running.
Large-scale machinery can not be manually rotated, so no-load power
immediately after cutting off power, mechanical idling, check for
vibration, noise, rotating parts are in contact, etc., to confirm no
abnormalities, into the power running.
Power running, from no-load low-speed start slowly raised to the rated conditions of the rated operation. Test
run to check the matter, whether there is abnormal sound, IKO bearing
temperature changes, lubricant leakage or discoloration and so on. If abnormal, should immediately stop running, check the machine, if necessary, remove the bearing inspection.
IKO bearing temperature, generally based on the external temperature of the housing presumed. However, the use of direct measurement of oil hole bearing outer ring temperature more accurate. IKO bearing temperature, gradually increased from the start of operation, usually 1 to 2 hours after the temperature stability. If the bearing is not installed properly, the temperature will rise sharply, with abnormally high temperature. The
reasons such as excessive lubricant, bearing clearance is too small,
poor installation, sealing device friction is too large. High-speed rotation of the occasion, IKO bearing structure, the choice of lubrication error is also the reason.
IKO
bearing rotation sound with a stethoscope and other checks, there is a
strong metal noise, abnormal noise, irregular sound abnormalities. The reasons for poor lubrication, poor shaft or IKO bearing precision, bearing damage, invasion of foreign bodies.
In regular maintenance, replacement need to remove the bearing. Disassembly, to continue to use or need to check the investigation, disassembly and installation as careful. Be
careful not to damage the bearings and parts, especially the
interference with the removal of bearings, the operation is difficult,
so in the design stage to be taken into account in advance to facilitate
the demolition. According to the need to design and manufacture of demolition tools is also very important. Disassembly,
according to the drawings to study disassembly methods, order, IKO
bearings with the investigation of the conditions for the smooth
operation of the demolition.
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