Identifying Mulfunctions of Slewing Bearings

For Malfunctions of slewing bearings whether appear or not during the rotation can be recognized or predicted without inspection by disassembling. These coups for identifying of mulfunctions are very important to improve the productivity and economy.


Main methods for identifying malfunctions of slewing bearings are as follows:


(1) Through the sound
Rich experience is necessary if through the sound recognization. Enough training is the way to distinguish sound of bearings and sound of other metal objects. So, it is better to use a special-assigned person to working on this job. Sound of bearings can be heard clearly through putting a listening device on the shell.


(2) Through working temperature
This is a compared identifying methord, only used under the condition of small changes of operation conditions. So continuous records of the working temperature. When the mulfunctions occour, not only temperature will increase, but also with the irregular changes.


(3) Through status of the lubricant
To analyse samples of the lubricant, based on its mudness degree to judge whether it is mixed with foreign matters or metal powder. This is a useful way used on slewing bearingsespecilly on these which cannot close to or with large size.

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