Check the operation of the machine's condition and prepare a thorough inspection program has become increasingly serious. Among them, the bearing is the focus of attention because it is the most important of all rotating machine parts . Condition monitoring is an important part of preventive maintenance . Early detection of bearing damage in order to avoid equipment downtime due to the bearing damage caused by unplanned maintenance period. However, not all of this and are equipped with advanced instruments . In this case , the machine operator or maintenance engineer must bearings "Fault signal" remain vigilant , such as noise , temperature and vibration. "Listen" , "touch" and "observation " is three important factors. The following views can be provided as your reference.
One touch
Bearing temperature can be measured periodically by means of a thermometer , you can accurately measure the bearing and follow the Celsius temperature display . The importance of the bearing , which means when it is damaged, can cause equipment downtime , and therefore the best type of bearing temperature detectors should be installed . Under normal circumstances, the bearing lubrication or just be re- lubricated and natural temperature rise for one or two days.
High-temperature bearings are often expressed in an abnormal situation . Temperature is harmful in the lubricant within the bearing . Sometimes bearing overheating can be attributed to the bearing lubricant , if the bearing temperature exceeds 125 degrees long run , will reduce bearing life , the causes of high-temperature bearings include : lack of lubrication or excessive lubrication, the lubricant containing impurities , the load is too large , bearing damage , lack of space, and high-temperature friction seals and so on . Therefore, continuous monitoring of the temperature of the bearing is necessary , either by itself or other important measure the bearing parts. If the operating condition does not become in the case of any change in temperature may indicate a fault has occurred.
Second, the observed
If you get a good bearing lubrication and proper blocking debris and moisture , which means that there should be no seal wear , however , it is best when you turn on the bearing housing to visual inspection and periodic checks bearing seals, check the condition of seals near the bearings to ensure that they are sufficient to prevent hot liquids or corrosive liquids or gases into the bearing along the axis . Protection ring and labyrinth seals should be greased in order to maintain its maximum protection. Seal若已wear should be replaced as soon as possible . In addition to preventing the function of seal into the bearing journal , another function is to keep the lubricant in the bearing box. If seal leakage should immediately check whether the seal has been broken or worn oil Cesson move. Leakage phenomenon also can be caused by loose joints or stir bearing housing and excessive oil leakage due to the formation of lubricant added , check the automatic lubrication system to ensure correct dosage , and lubricant discoloration or darkening view , if there is such a phenomenon , it usually means a lubricant containing magazine .
Third, listen
To recognize an irregular use of auditory operation is a very common approach. For example by means of electronic stethoscope to check for abnormal noise is to use a part of the experience of the operator. If the bearing is in good running condition emits low whining sound. If a sharp hissing sound , squeaky voice and other irregular sounds , usually means the bearings are dysfunctional situation . Sharp squeaky noise may be caused due to improper lubrication . Inappropriate bearing clearance can also cause metal sound. Dents on the bearing outer track will cause vibration , resulting in smooth and crisp sound. If due to installation of the scars caused by the knocking noise will produce this noise level as the speed of the bearing is different . If there are intermittent noise , then rolling elements may be damaged. This sound occurs when the damaged surface is rolling out of date, if the bearing contaminants often cause hissing. Serious bearing damage will produce irregular and loud noise .
Bearing damage can certainly be perceptible by the hearing , but usually at this time has come to replace the bearings must immediately unavailable . So, better methods such as the use of electronic monitoring equipment status , 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 ) , the use of advanced instruments more accurately estimate the bearing condition .
Fourth, grease lubrication
Re- lubricated bearings best equipment downtime during implementation of the plan , and regularly supplement. At the same time clear out the old grease or oil through the drain plug out the old grease agent . Prior to joining the new oil to the nipple should be wiped clean. If the bearing housing of the device did not give glib , you should open the lid or cap bearing to remove the old grease, then the same complement of fresh grease.
Fifth, oil lubrication
View bearings when the oil level should be used to ensure the correct type of oil and the oil level is whether there is blockage of the vent .
A small amount of oil and a fresh oil sample and comparing . If the sample appears cloudy , it may be mixed with water results should be replaced. If the sample showed a darker color or thickens, it may indicate that the oil began to carbonation . All the old oil should be replaced, if possible , use fresh oil to flush bearings. Change the oil at the same time should ensure that the replacement must be the same type of oil , and added to the oil level as required .
There is a more reliable method to determine the condition of the oil , then the sample is analyzed , if the oil is contaminated should be replaced through the filter seal or consideration .
Using an oil bath lubrication system , if the operating temperature does not exceed 50-60 degrees Celsius, and no contamination of oil , the oil can be replaced once a year . If the operating temperature is 100 degrees Celsius, then four times a year to replace the oil, if the operating temperature of 120 degrees Celsius, then the oil changed once a month , if the operating temperature of 130 degrees Celsius then the oil changed once a week .
Proper installation and maintenance is to play an important factor bearing longest life . Must also pay attention to cleanliness of the bearing, the bearing selection accuracy and the choice of appropriate installation and maintenance tools . Bearings must prevent contamination of pollutants and moisture must be properly installed and lubricated . Bearing with the column design , condition seals and lubricant type and lubrication cycle , as well as specialized care all play the same important role.
One touch
Bearing temperature can be measured periodically by means of a thermometer , you can accurately measure the bearing and follow the Celsius temperature display . The importance of the bearing , which means when it is damaged, can cause equipment downtime , and therefore the best type of bearing temperature detectors should be installed . Under normal circumstances, the bearing lubrication or just be re- lubricated and natural temperature rise for one or two days.
High-temperature bearings are often expressed in an abnormal situation . Temperature is harmful in the lubricant within the bearing . Sometimes bearing overheating can be attributed to the bearing lubricant , if the bearing temperature exceeds 125 degrees long run , will reduce bearing life , the causes of high-temperature bearings include : lack of lubrication or excessive lubrication, the lubricant containing impurities , the load is too large , bearing damage , lack of space, and high-temperature friction seals and so on . Therefore, continuous monitoring of the temperature of the bearing is necessary , either by itself or other important measure the bearing parts. If the operating condition does not become in the case of any change in temperature may indicate a fault has occurred.
Second, the observed
If you get a good bearing lubrication and proper blocking debris and moisture , which means that there should be no seal wear , however , it is best when you turn on the bearing housing to visual inspection and periodic checks bearing seals, check the condition of seals near the bearings to ensure that they are sufficient to prevent hot liquids or corrosive liquids or gases into the bearing along the axis . Protection ring and labyrinth seals should be greased in order to maintain its maximum protection. Seal若已wear should be replaced as soon as possible . In addition to preventing the function of seal into the bearing journal , another function is to keep the lubricant in the bearing box. If seal leakage should immediately check whether the seal has been broken or worn oil Cesson move. Leakage phenomenon also can be caused by loose joints or stir bearing housing and excessive oil leakage due to the formation of lubricant added , check the automatic lubrication system to ensure correct dosage , and lubricant discoloration or darkening view , if there is such a phenomenon , it usually means a lubricant containing magazine .
Third, listen
To recognize an irregular use of auditory operation is a very common approach. For example by means of electronic stethoscope to check for abnormal noise is to use a part of the experience of the operator. If the bearing is in good running condition emits low whining sound. If a sharp hissing sound , squeaky voice and other irregular sounds , usually means the bearings are dysfunctional situation . Sharp squeaky noise may be caused due to improper lubrication . Inappropriate bearing clearance can also cause metal sound. Dents on the bearing outer track will cause vibration , resulting in smooth and crisp sound. If due to installation of the scars caused by the knocking noise will produce this noise level as the speed of the bearing is different . If there are intermittent noise , then rolling elements may be damaged. This sound occurs when the damaged surface is rolling out of date, if the bearing contaminants often cause hissing. Serious bearing damage will produce irregular and loud noise .
Bearing damage can certainly be perceptible by the hearing , but usually at this time has come to replace the bearings must immediately unavailable . So, better methods such as the use of electronic monitoring equipment status , 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 ) , the use of advanced instruments more accurately estimate the bearing condition .
Fourth, grease lubrication
Re- lubricated bearings best equipment downtime during implementation of the plan , and regularly supplement. At the same time clear out the old grease or oil through the drain plug out the old grease agent . Prior to joining the new oil to the nipple should be wiped clean. If the bearing housing of the device did not give glib , you should open the lid or cap bearing to remove the old grease, then the same complement of fresh grease.
Fifth, oil lubrication
View bearings when the oil level should be used to ensure the correct type of oil and the oil level is whether there is blockage of the vent .
A small amount of oil and a fresh oil sample and comparing . If the sample appears cloudy , it may be mixed with water results should be replaced. If the sample showed a darker color or thickens, it may indicate that the oil began to carbonation . All the old oil should be replaced, if possible , use fresh oil to flush bearings. Change the oil at the same time should ensure that the replacement must be the same type of oil , and added to the oil level as required .
There is a more reliable method to determine the condition of the oil , then the sample is analyzed , if the oil is contaminated should be replaced through the filter seal or consideration .
Using an oil bath lubrication system , if the operating temperature does not exceed 50-60 degrees Celsius, and no contamination of oil , the oil can be replaced once a year . If the operating temperature is 100 degrees Celsius, then four times a year to replace the oil, if the operating temperature of 120 degrees Celsius, then the oil changed once a month , if the operating temperature of 130 degrees Celsius then the oil changed once a week .
Proper installation and maintenance is to play an important factor bearing longest life . Must also pay attention to cleanliness of the bearing, the bearing selection accuracy and the choice of appropriate installation and maintenance tools . Bearings must prevent contamination of pollutants and moisture must be properly installed and lubricated . Bearing with the column design , condition seals and lubricant type and lubrication cycle , as well as specialized care all play the same important role.
