Operation bearing inspection Note

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        Check the status of running transit in advance of the class to prepare a thorough inspection program has become increasingly important. Among them, bearing the focus of attention, because it is the most important turning point o f all rotating parts, condition monitoring is an important part of preventive maintenance. Early detection of bearing damage in order to avoid unplanned equipment downtime due to bearing damage.

However, not all instruments are equipped with advanced instruments. In this case, the transit operators or maintenance engineers must be vigilance on the bearing fault signal, such as noise, temperature and vibration. "Listen" to "touch" and "observe" the three important methods. The view can be provided below as your reference.

1, listen to

Hearing to identify the irregular operation is a very common method. For example, with the electronic stethoscope, and mechanical to listen to the needle to find certain parts of the abnormal noise is often the method used by the experienced staff. If the bearing is in good running condition will be issued a low hum sound, if issued a sharp hissing sound, squeaky sound, and other irr egular sounds, usually bearing in adverse operating conditions.

Sharp squeaking noise may be caused due to improper lubrication, improper bearing clearance will cause the metal sound. Dent on the bearing outer track may cause vibration and resulting in a smooth and crisp sound. As the installation percussion scars will produce noise, this noise will vary with the level of bearing speed. If there is an intermittent noise, it means that the scroll may be damaged, this sound occurs when damage to the surface of RCC outdated. Bearing if pollutants are often caused by a hissing sound. Serious damage to the bearing will produce irregular and tremendous noise.

Bearing damage of course perceived by hearing, but the stage is usually at this time has come to the bearing must be immediately replaced, so the better way cases is the use of condition monitoring instruments such as electronic pre-diagnosis of the functioning of the bearing.

Compared to the old method (using a stick or screwdriver against the bearing housing, the other end of the stick to the ear), and the use of advanced instruments more precise estimate of the bearing condition.

2, touch

The high temperatures often bearing an abnormal state. The high temperature is also harmful to the bearing lubricant. Overheating sometimes bearing the blame on the bearing lubricant, bearing more than 125 ° C (260 ° F) temperature long-term operation will reduce the life of the bearings, causing bearing high temperature because: lack of lubrication or over-lubrication, the lubricant contains impurities, the load is too large, bearing damage, lack of space and high-friction oil seals produce.deep grove ball bearing

Therefore, continuous monitoring of bearing temperature is necessary, whether it is a measure of the bearing itself or other impo rtant parts. If it is under the same operating conditions, any temperature change may indicate a failure has occurred.

Periodic measurement of the bearing temperature can be by means of a thermometer can accurately measure bearing temperature.

The importance of bearing, which means when it is damaged, can cause equipment downtime, so this type of bearing is best should be retrofitted with a temperature probe.

Under normal circumstances, the bearings will be just lubrication or lubrication after natural temperature rise and continue for one or two days.deep groove ball bearing

3, the observed

Bearing good lubrication and to ensure the correct blocking debris and moisture, said oil seal should be no wear and tear. However, the best Open the bearing housing to the visual inspection of bearings and regularly check the oil seal. Che ck close to the situation of the bearing at the oil seal to ensure that they are sufficient to prevent the hot liquid or corrosive liquids or gases penetrate the bearing along the axis. Guard ring and labyrinth oil seals should be coated with grease to ensure a large number of protective effect. Oil seal Ruoyi wear should be replaced as soon as possible.

The function in addition to the oil seal to prevent impurities from entering the bearing, another function is the lubricant to keep the bearings inside. Oil seal if leakage should immediately check the oil seal wear and tear damage or oil Cesson move. Leakage may also lead to a result of the bearing box joints loose or lubricants add too much formed by mixing oil spill phenomenon. Check the automatic lubrication system to ensure that the correct oil or grease into the bearing, and to ensure the correct dosage at the same time, view the lubricant is discolored or black, this phenomenon, usually indicates that the l ubricant deterioration or contain impurities, they should immediately be replaced.thin bearings