Standard installation method of imported bearing and lubrication and maintenance on a regular basis

1, ready to import bearings due to the bearing through antirust processing and packaging, so do not open the packing before installation. In addition, the coating on bearing anti-rust oil has good lubrication performance, for the general purpose of bearing or bearing grease filling, can not directly use cleaning. But for the instrument bearing or bearing for high-speed rotation, the application of clean cleaning oil washed away anti-rust oil, when the bearing is easy to rust, not for a long time. 2, shaft and the inspection cleaning bearing shell and shell, confirm no scar or mechanical processing of burr. Shell has absolutely can not have abrasives ( SiC and Al2O3, etc. ) Sand, scraps, etc. Next inspection shaft and shell size, shape and machining quality are consistent with those drawings. Installation method of bearing, because of the bearing fit, condition, structure, general, due to many as the axis of rotation, so the inner circle need interference fit. Cylindrical hole bearing, multi-purpose press pressure into, or multi-purpose hot charging method. Taper hole, installed directly on the taper shaft, or use the socket installation. When installed on the shell, clearance fit more commonly, outer ring have surplus quantity, usually use the pressure into the press and or have shrink fit method of cooling after installation. Use dry ice as coolant, shrink fit installation, the moisture in the air condenses on the surface of bearing. So, need a good rust prevention measures. Install the bearing is correct, affect the life, the precision and performance. Therefore, design and assembly department for the installation of the bearing be fully studied. Hope to work in accordance with the standards for installation. Operation standard project usually is as follows: 1, cleaning bearings and bearing related parts 2, check the size and finishing condition of bearing associated components installed 3, bearing 4, examination and 5 after good bearing, bearing of supply lubricant, a method of imported bearing installation should be according to the bearing structure, size and cooperate with properties of bearing parts, pressure should be directly in the tight fit on the ring width, shall not be passed on roller pressure, bearing installation commonly adopt the following methods: the installation of the thrust bearing thrust bearing of the matching of the thorough and axis is commonly transition fit, seat and the bearing holes with the general for the clearance fit, so this kind of bearing is easy to install, the center axis of the two-way thrust bearing should be fixed on the shaft, to prevent the relative to the axis of rotation. Bearing installation method, usually is the situation of the axis of rotation, so the inner ring cooperate for win cooperate with shaft, with the bearing outer ring and bearing chamber for clearance fit. Force fit tight fit bearing inner ring and the shaft, the outer ring and bearing hole is a loose fit, press the bearing to be pressed on the shaft are available, and then put the shaft together with the bearing load bearing hole, when pressed on the bearing inner ring end face, cushion the assembling casing made of a soft metal materials ( Copper or mild steel) , the inner diameter of the casing assembly should be slightly larger than the diameter of a journal, outside diameter than the bearing inner ring guard slightly smaller, in order to avoid pressure in keeping the frame. Second, cleaning grease lubrication for bearings and related parts imported bearing and oil seal or on both sides of the dust cover, seal bearing without cleaning before installation. Check the size of the related parts and finish machining. 1, grease lubrication of imported bearings and lubrication is the best in the equipment downtime and implementation of the plan and added on a regular basis, at the same time, the old rid grease or via the drain the old oil out empty. Before adding fresh grease injection nozzle should be wiped clean. If there is no zerk bearing box, should open the bearing box cover or end cover, in order to remove the old grease, clean up after, supplement the same type of fresh oil. 2, lubricating oil, check the oil level of lubricating oil and the oil, in general, a normal oil level equipment oil level Windows or mark a third - Two-thirds of the range. Oil compensating way for oil cup, the display of the oil level represents oil compensating ability, and the bearing box oil level is to meet operation requirements, oil cup CPC a lower than a quarter of its total volume filling oil may be considered. Check and repair method oil, remove a small amount of oil as a sample and fresh oil, has the ability to unit may be considered for oil testing, to ensure the oil qualified. If the sample looks like clouds, so may be mixed with water as a result, people often say that oil emulsification, at this time should replace the lubricating oil. If the sample cheng dark color or thick, then may say lubricating oil has begun to carbonization, should be replaced the old oil thoroughly. If possible, use fresh oil to wash oil. Oil change, should ensure that the replacement with new and old the same type of lubricating oil, adding the meet the requirements of oil level. Use of the lubrication system of oil bath type, if the oil temperature 60 ℃ ( 140°F） The following, and no pollution of lubricating oil, the replacement of a lubricating oil a year. If the oil temperature at 60 100℃（ 140 - 210°F) Need to change four times a year, the lubricating oil. If the oil temperature at 100 - 120℃（ 210 - 250°F) , you need to be replaced every month lubricating oil. If the oil temperature at 120 ℃ ( 250°F) Above, the need to replace a weekly lubricating oil. The correct installation and maintenance is an important factor for normal operation of imported bearing, at the same time, must pay attention to maintain the purity of the bearing. Bearings must prevent polluted by contaminants and moisture, must have a correct installation and lubrication. In addition, the design of the bearing arrangement, the condition of the oil seal, the form of a lubricant and change cycle and special maintenance also play an important role, must be attention.