Date: 2013-08-22

KOYO cross roller bearings exciting CAUSE

Cross roller bearings exciting because there are many, mainly for the following checks:
1, the excitation generated due to changes in the number of loaded rolling body
When a radial load loaded cross roller bearings, bearing load the number of rolling elements in the operation of a slight change, namely: offset caused by the load direction. The resulting vibration is inevitable, but to reduce the axial pre-load, but not all rolling element load for cylindrical roller bearings.
2, the member waviness
In the case of tight fit between the the KOYO bearing ring and the bearing or drive shaft, cross roller bearing ring may be deformed shape compatible with adjacent components. If there is a deformation in the operation may produce vibration. Accordingly, the bearing housing and the shaft is machined to the required tolerances is very important.
3, bearing partial damage
Small part due to the operation or installation errors, cross roller bearings roller Road and rolling elements may be damaged. In operation, rolling across the damaged KOYO bearing member will generate a lot of the vibration frequency. The vibration frequency analysis can identify the damaged bearing member.
How to reduce or avoid cross-roller bearings exciting? There are several methods you can try:
1, removed from the application of the critical excitation vibration
Typically, the temperature cross roller bearings with the bearing running slowly began to rise 1-2 hours to reach steady state. The bearing normal temperature of machine heat capacity, heat capacity, speed and load and the type. Lubrication, install the appropriate department, the bearing temperature will rapid-rise abnormally high temperatures, there will be time to stop running, to take the necessary precautions.
2, using the thermal sensor can monitor the cross roller bearing operating temperature, alarm or stop automatically when the temperature exceeds the specified value to prevent burning shaft accident.
Often with high temperature bearing in unusual circumstances. Temperature is harmful to the bearing lubricant. Sometimes cross roller the bearing overheating can be attributed KOYO bearing lubricant. If the bearing temperature over 125 ℃ even move to reduce long-term bearing life.  

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