Rolling bearing creep refers to what, bearing creep factor

Creep is one of the rolling bearing common form of damage, we need to according to the specific bearing concrete damage to distinguish the damage of bearing bearing, in turn, determine the bearing to how to deal with, the bearing small make up according to the understanding of the knowledge of bearing, today to share about bearing creep under relevant knowledge is introduced in detail. What is the bearing creep? Creep refers to the bearing clearance in the bearing of mating surfaces, in terms of relative sliding between the mating surface. Registering creep are angled with the mirror light or dark side, sometimes with a card injury and wear. Creep are inner ring rolling bearing creep and creep two outer ring. Roller bearing inner ring creep refers to the bearing inner ring with fixed axle by interference fit, to prevent sliding of the inner ring relative to the axle. But, once can't maintain the proper amount of interference, the mating surface of inner ring and axles generation gap, inner ring will be relatively axle and sliding, the creep phenomenon called inner circle. Creep refers to the rolling bearing outer ring rolling bearing in use process, there is outer ring relative to the bearing occurred the phenomenon of slow rotation movement, known as the outer ring creep. Creep will cause bearing outer ring or outer ring wear and wear particles into the bearing internal, lead to bad of the bearings. The influence factors of rolling bearing inner ring creep: inside is in the early stages of creep, found no bearing temperature rise sharply, bearing temperature have no direct relationship with the inner ring creep speed. Creep speed at the same time, the inner ring to rotate, shaft inner ring mating surface wear will intensify. Turn hammered out bearing in this state, will be for bearing internal damage, the lubrication state of aging as well as the bearing axis misalignment in the bearing temperature rise. Although inside is the early stages of creep, bearing temperature will not rise sharply, but with the development of creep, the inner ring to spin state, data loss may occur. Therefore, to prevent the creep, bearing inner ring between shaft and keep the appropriate amount of interference is very important. At the same time, preventing the heat damage of bearing, equipment reliability, high bearing temperature monitoring system is also very important. The factors influencing creep: 1, the temperature, the temperature, the steady-state creep rate increases, 2, stress, steady-state creep rate as stress increases, 3, the influence of the microstructure, creep is a sensitive to microstructure comparison of performance indicators. Stomatal grain size equals the glass has a great influence on creep performance. The influence factors of rolling bearing outer ring creep: 1, the influence of fit clearance fit clearance in - 30嗯- + 30 microns range creep torque calculation results are shown in figure 1, with reduced clearance, locates variable torque is reduced, it difficult to creep in. Number 2, the influence of the number of roller rolling body as shown in figure 2, the influence of creep torque decreases with the increase of rolling element number. This is due to the increase making smaller load roller rolling element number, thus inhibiting the outer ring of local deformation. 3, the influence of outer wall thickness consider raising the outer ring of the rigid to suppress the occurrence of creep, outer wall thickness ( With the ratio of the diameter of roller) As shown in figure 3, the influence of creep moment with the increase of outer wall thickness decreases, and it difficult to creep in. Bearing the continuation in creep over time can be divided into three stages: 1, the initial creep or transient creep strain increases with time continues, but increase the speed gradually slow down; 2, steady-state creep, or steady creep strain continues at a constant speed and increasing over time, this stage is longer than the other; 3, accelerated creep strain continue over time and speed increase, to the bursting point. The shorter the total stress, the greater the creep time; Stress is smaller, the longer the total time of creep. But each material has a minimum stress value and stress below the value no matter how long experience nor rupture, or creep time infinite, the stress value is called the long-term strength of the material.