IKO needle roller bearing with lubrication maintenance technical analysis - bearing knowledge

IKO bearings with the needle roller bearing is the function of stationary ring and rotating ring and stationary part of the installation site ( Usually bearing) And rotating parts ( Usually the shaft, Consolidation in together, so as to realize in the condition of rotating relative to the static load and limited movement system the basic task of the system location. In the shaft and bearing, needle roller bearing requirements in the radial, axial and tangential direction to three directions such as fixed position. Through the positioning of the radial and tangential the tight fit of bearing ring, the axial positioning only in a few cases with tight fit; Generally USES the axial spacing parts, such as end cover and retainer could happen on the axial location clearance range. Choosing cooperation should focus on the following four: ( 1) Bearing ring circumferential surface should have good bearing and force uniform, in order to reduce the deformation, and can give full play to the bearing capacity of the IKO bearings. ( 2) Ring in its surface can't slide along the tangent direction, otherwise it will damage the mating surface. ( 3) Freedom end bearing must be able to adapt to changing with the length of the shaft and bearing seat holes, which must have to adapt to the axial location within a certain range of swimming ability. ( 4) Must pay attention to the erection and dismantling of needle roller bearing is simple, saving time and costs for the province. Choose the penetration of heavy load small grease work under high pressure in addition to the penetration of small, must have high oil film strength and extreme pressure properties. According to the environmental conditions choosing grease, calcium base grease is not easy to dissolve in water, suitable for dry and less moisture environment. IKO bearings commonly used grease has sodium calcium base grease grease sodium calcium base grease lithium grease aluminium base grease and molybdenum disulfide grease, etc. Filled with needle bearing grease filling in quantity, to 1/2 - bearing internal space A third as appropriate. When high speed should be reduced to 1/3 of excess grease will lead to higher temperature rise. Bearing temperature, generally have a bearing on the surface of the outdoor temperature can be predicted, if using the oil hole can direct measurement of thin wall temperature of the bearing outer ring, is more appropriate. Generally, the temperature of the bearings with bearing operation began to slowly rise, 1 - After 2 hours to reach steady state. Normal temperature of the needle roller bearing for machine heat capacity, heat dissipating capacity, rotational speed and load. If the appropriate lubrication, installation department, IKO bearing temperature will rise sharply, appear unusually high temperature, must stop at this moment, take the necessary precautions. Bearing is a kind of precision mechanical bearing components, bearing users deeply hope perfectly on the host bearing can be used for a predetermined period from damage and keep its dynamic performance, but reality sometimes is not very desirable, sudden bearing failure accident can cause great losses to the user. Through a lot of bearing failure analysis research shows that the needle roller bearing short-lived or premature loss of accuracy, have a plenty of due to improper material defect or manufacturing, but in a considerable extent is because there is no bearings used in strict accordance with the requirements for installation, maintenance, or bearing selection or actual load than thin wall bearing itself causes such as the rated load of IKO bearing abnormal damage. Bearing a cracked spalling is due to the bearing under the action of cyclic load, the contact surface fatigue damage is easy to occur, so in order to improve the service life of the needle roller bearing, bearing steel must have a high contact fatigue strength. Hardness is one of the important quality of IKO bearing quality, the contact fatigue strength, wear resistance, elastic limit has a direct impact. Thin wall bearing steel in the condition of using the hardness of general to achieve HRC61 ~ 65, needle roller bearing can obtain high contact fatigue strength and wear resistance.