IKO needle roller bearing with smooth maintenance technical analysis

IKO bearings with the needle roller bearing is the function of stationary ring and rotating ring parts of a static local respectively with device ( Usually bearing) Local (and rotation Usually the shaft, Consolidation in together, so as to complete transmission in the condition of rotating load and limit the basic task of motion systems related to stationary position. In the shaft and bearing, needle roller bearing requests in the radial, axial and tangential direction to three directions such as fixed position. After the positioning of the radial and tangential the tight fit of bearing ring is completed, the axial positioning only in a few cases with tight fit; Common USES axial spacing parts, such as end cover and retaining ring could happen on the axial location clearance range. Choose to cooperate should be emphatically pay attention to the following four: ( 1) Bearing ring circumferential surface should have a good bearing and average stress, to reduce the deformation, and can play a robust IKO bearings bearing ability. ( 2) Ring in its appearance can't slide along the tangent direction, otherwise it will damage the mating surface. ( 3) Free end bearing necessary to adapt to changing the length of the shaft and bearing hole, namely must have axial position within a certain range can swim. ( 4) Must pay attention to make the needle roller bearing device and remove the cumbersome, saving time and costs for the province. For heavy duty should choose penetration smooth small fat when work under high pressure in addition to the penetration of small, must have high oil film strength and extreme pressure properties. Based on environmental conditions choosing smooth fat, calcium base grease is not easy to dissolve in water, smooth less suitable for dry and water environment. IKO bearings commonly used smooth fat have smooth smooth calcium base grease sodium based fat smooth smooth sodium calcium base grease lithium base grease smooth smooth aluminum base grease and molybdenum disulfide grease, etc. Needle roller bearing in the smooth filling grease quantity to filled with 1/2 - bearing internal space A third for suitable. Smooth high speed should be reduced to 1/3 of too much fat will lead to higher temperature rise. The temperature of bearing, the average has a bearing on the surface of the outdoor temperature can fathom out, if used oil hole can direct measurement of thin wall temperature of the bearing outer ring, is more appropriate. Usually, the temperature of the bearings with bearing operation beginning gradually rise, 1 - Two hours later to reach steady state. Normal temperature of the needle roller bearing for machine heat capacity, heat dissipating capacity, rotational speed and load. If smooth, device is appropriate, IKO bearing temperature will rise sharply, can present abnormal high temperature, then must stop and take the necessary precautions. Bearing is a kind of fine mechanical bearing components, bearing users deeply hope perfectly on the host bearing can be due to the use of the term is not damaged and stick to its dynamic performance, but reality sometimes is not very desirable, bearing failure accidents could become a severe losses to the user. Indicated after a great deal of bearing failure analysis discussion, needle roller bearing short-lived or premature loss of accuracy, have a plenty of due to defects or improper manufacturing information, but at a considerable level is because there is no strict according to the bearing use request stop device, maintenance, or load bearing selection or practice beyond the thin wall bearing its own load rating form IKO bearing abnormal damage reason. Bearings cracked spalling because of bearing is presented under the action of cyclic load, the contact fatigue damage form appearance is easy to attack, so in order to advance the use of needle roller bearing life, bearing steel must has the very 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 the ordinary to reach HRC61 ~ 65, talents enable needle roller bearing to achieve higher contact fatigue strength and wear resistance.