2013年8月19日星期一

Bearing operation precautions

Listen checks the status of the machine operation and prepare a thorough inspection plans has become increasingly important. Among them, the bearing is the focus of attention, because it is the most important of all the machines rotating parts. Use hearing to identify irregular operation is a very common method, if the bearing is in good operating condition, it emits low whining sound; if a sharp hissing sound, squeaking sound, and other irregular sounds, usually the bearing is in poor running condition. How to listen? The old method: Use a stick or screwdriver against the bearing housing and the other end affixed to live ears; advanced methods: the use of advanced equipment, such as electronic monitoring equipment status, pre-diagnosis of the functioning of the bearing.
Touch
If the roll bearings temperature over 125 ℃ long-term operation, will reduce bearing life, high temperature bearings are often expressed in an abnormal condition, causing high temperatures reasons: lack of lubrication or excessive lubrication, the lubricant containing impurities, the load is too large, bearing damage, lack of space, and seal friction generated by the high and so on. Therefore, detection of bearing temperature is necessary, either by itself or other important measuring bearing parts. The old way is to touch the bearing housing temperature sensation, now by means of a temperature probe, which can accurately measure the temperature of the bearings and displayed in order to effectively take protective measures.
Observation
If you get a good bearing lubrication and proper debris and moisture barrier, which means that there should be no oil seal wear. However, the best in the open bearing box to visually inspect the bearings and regularly check seals. Check the status near the bearings seals to ensure that they are sufficient to prevent the hot liquids or corrosive liquids or gases penetrate along the bearing axis. Protection ring and labyrinth seals should be coated with grease to ensure maximum protective effect, seal If wear should be replaced soon.

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