Common method of the United States TIMKEN bearing inspection and acceptance

Check the United States TIMKEN bearing, the user must have the following knowledge: ( 1) Bearing commodity inspection according to which standard; ( 2) What are the project bearing the commodity inspection, why do you want to test these projects; ( 3) Bearing goods before the quality inspection, what kind of preparation need to do, ( 4) Bearing all inspection items of the goods is under what conditions, with what method, what kind of test instrument, test results must be what qualifies as a proper tolerance range; ( 5) Bearing goods of batch is very big, sometimes can't be one hundred percent inspection, it should adopt what kind of sampling plan, sampling quantity for inspection, can more fully and reliable enough to represent the quality of all goods bearing, and the result of inspection is according to any standard to measure, is to determine the commodity should be accept unqualified batch, or unqualified batch shall be rejected. Bearing the acceptance inspection is usually divided into three categories, namely: routine check - General inspection routine when bearing the arrival of the goods. Regular check - Related to the assembly of the United States TIMKEN bearing of dimensional precision, rotating accuracy, bearing clearance and the residual magnetic intensity of bearing inspection project. Special inspection - For the vibration of the bearing quality and noise quality inspection and other special requirements for bearings. Get good lubrication if observation bearing and the correct cut off impurities and moisture, said oil seal should not wear, however, when open the bearing box, best visual inspections in the United States TIMKEN bearing and periodically check the oil seal, check of the condition of the near the bearing oil seal to ensure that they are enough to prevent hot liquids or corrosion along the axis of the liquid or gas seeping into the bearings. Protection ring and labyrinth seal should besmear fat in order to protect its biggest protection. If oil seal was worn, it should be replaced as soon as possible. The function of the oil seal in addition to prevent access journal bearing, another function is to keep lubricant in the bearing box. If oil seal oil leakage phenomenon, should immediately check whether the oil seal is already wear damage or oil plug is loose. Oil leakage phenomenon may result in bearing box joint loose surface or due to excessive lube formed by mixing and oil leakage, check the automatic lubrication system to ensure that the correct amount, examine whether the lubricant change color or black at the same time, if have this kind of phenomenon, usually said lubricant containing impurities. 3 listen to use hearing to identify irregular operation is a very common method. For example, with the aid of electronic stethoscope to check some parts is abnormal noise used by the experience of the operator method. If the bearing is in good operation condition will be low whimpering sound. If a sharp hissing sound, make sound, and other irregular usually said bearing in the operation condition of bad. High-pitched squeaky noise may be caused by improper lubrication. Inadequate bearing clearance may also cause a metallic sound. Bearing outer ring grooves on the tracks can cause vibration, and sound like the coo of a smooth. If because of the installation caused by hitting scar also can produce noise, the noise will be different with the United States TIMKEN bearing rotating speed of high and low. If there are intermittent noise, rolling parts may be damaged. This voice is happens when the damaged surface rolling out of date, bearing inner if pollutants often causes hiss. Serious damage of bearing can produce irregular and big noise. Bearing damage is can borrow by listening to sleep, but usually at this time has come to the bearing must be replaced immediately. So, a better method for example using techniques such as electronic condition monitoring instrument, the workings of the diagnosis of bearing in advance. Compared with old method ( Use a wooden stick or a screwdriver in the bearing box, the other end of the stick to the ear) , the use of advanced instrument can accurately estimate the bearing condition. 4 is best to lubricating grease lubrication bearing in the equipment downtime and implementation of the plan and regularly. At the same time, the old oil clear off or old oil agent out through the drain plug. Should give before adding new oil nozzle is wiped clean. If the bearing box does not to choke devices, should open the bearing box cover or end cover so as to get rid of the old oil, then add the same fresh grease. 5 oil lubrication to examine the United States TIMKEN bearing oil level, should be sure to use the oil type is correct and if there is a blocked vent of oil level. Take out a small amount of oil as a sample and compared with fresh oil. If the sample looks like clouds, so may be mixed with water as a result, should be replaced. If the sample is dark color or thick, then could start carbide said the oil. Should replace all the old oil, if possible, use fresh oil to wash bearings. The oil change at the same time should ensure that the replacement of oil type must be the same, and added to the required oil level. There is a more reliable method to determine the oil situation, is the analytical samples, if the oil is contaminated oil seal or consider filters should be changed. Use of the lubrication system of oil bath type, if there is no more than 50 - operating temperature 60 degrees, and the oil is not contaminated, the oil change once a year. If the operating temperature is 100 degrees, the oil change 4 times a year, if the operating temperature is 120 degrees, the oil change once a month, if the operation temperature of 130 degrees Celsius, the oil change every week. Have a bearing on the correct installation and maintenance is an important factor of the longest service life. Must pay attention to the bearing at the same time, the clean degree of the correctness of the bearing selection and choose the appropriate installation and maintenance tools. Bearings must prevent polluted by contaminants and moisture, must correct installation and lubrication. The United States TIMKEN bearing with the design of the column, the condition of oil seal, lubricant type and lubrication cycle, and special maintenance plays the same important role.