FAG super precision angular contact ball bearing performance know how much?

FAG super precision angular contact ball bearing performance know how much? 2019 - 11 - 16 - Carrying capacity and life grade ultra-precision angular contact ball bearings are used in the machine tool spindle, textile machinery, woodworking machinery, and there is a requirement for high reliability, precision and recommend suite operation area. FAG of the ultra-precision spindle angular contact ball bearing represents the use of reliable. Highest precision and the cleaner production process of the bearing assembly of spindle bearing installation ultra-precision angular contact ball bearing should not only guide the high precision mechanical parts also to ensure that the operation has enough support in the process of high-speed operation. In order to fully ensure that meet the job requirements, bearing must be free of wear and tear. 1, super precision angular contact ball bearing life ultra-precision angular contact ball bearing is to guide the mechanical parts and high precision operation and to ensure that operate at a high speed when there is enough support, so the choice of bearing main consider precision, rigidity, and operation performance of the main factors. At the time of bearing must be to ensure that the rolling element and raceway contact area with lubricating oil film is generated. In a condition, with the oil film bearing the actual fatigue life is longer. If the bearing to achieve fatigue life, the life of the bearing is under the influence of lubricant service life. In the related conditions decide the size of the working life of the bearing load factor is the rolling element and raceway contact area between the size of the contact stress and the dynamic performance of the bearing. In the process of practical work, the ultra precision bearing will not lead to failure, because of fatigue life loss but grease agent leads to failure. Ultra precision angular contact ball bearing fatigue life is generally depends on the working life of the lubricant, in many cases, the life of the lubricant, determines the bearing's life. The fatigue life of bearing relative impact is smaller. 2, fatigue load: to test the fatigue load, load ratio So calculated according to the following formula: So = Co/PoSo: fatigue load ratio ( Dynamic load factor of safety) Co: basic static load rating NPo: equivalent static load, you can use the equivalent static load formula to calculate, is calculated using dynamic load. Equivalent static load Po is calculated according to the bearing axial and radial load. The force between the rolling element and raceway contact stress area in the center of the biggest causes of stress is equal to the actual load synthesis caused by stress. For the actual load bearing of the biggest bearing to verify its carrying capacity. If dynamic load than So> 8, is to meet the main premise of fatigue loading conditions, a more accurate method is to separate measurement bearing contact stress, or use a dedicated computing software testing bearing dynamic performance. If effective lubricant film ( Viscosity than k≥ 2) And high cleanliness and other conditions can meet the requirements, do not need to calculate the bearing rated life. If these preconditions unattainable, lubrication and cleanliness of the influence of the bearing can be obtained by manual calculation correction formula ISO281 life or computer aided calculation through DIN281 appendix 4. 3, cleanliness for ultra precision bearings, the rolling element and raceway contact surface cleanliness of the working life of the bearing has a great influence, because the pollutants will dramatically increase the wear and tear, reduce the service life of bearing. Value is the guidance of cleanness of oil lubrication is the result of hydraulic conditions can see from the table below. For grease lubrication, if bearing has been die erste installation and sealing grease, the bearing has been the highest level of cleanliness. Point contact state of the purity of the lubricant recommended by reference such as the sample filter manufacturers or research institute, the purity of the lubricating oil level can be used to indicate the pollution particles to reduce the influence of the bearing life. After circulating oil filter can meet the requirements of specific cleaning. Before installation of bearing, the relevant contact parts need to be cleaned to ensure cleanliness. 4, the working temperature for ultra precision bearing, FAG ring material can guarantee size temperature is + 150 ℃, if higher than the temperature, need to consider temperature effect on the properties of bearing material. But to pay attention to the limit temperature of components, such as cage, +100℃） , bearing seals, +100℃） And the temperature of the lubricant, etc. Hk united bearing focus bearing industry informationization service nearly 20 years, with many excellent bearing enterprise grows together, also witnessed China's bearing production technology from low to high development process. We will adhere to continue, the steadfast work, don't, don't give up, for the benign development of Chinese bearing industry do render some. Hk united bearing network bearing engineers, 2019. 05. 16