How to calculate the axial force of rolling bearing
Publish: 2021-05-23 02:45:58
1. 5 Calculation of radial load ft and axial load FA of angular contact ball bearing and tapered roller bearing
when the equivalent dynamic load P of each bearing is calculated according to equation (13-8a), the radial load f is the radial load generated on each bearing by the radial force F acting on the shaft from the outside; However, the axial load F. is not completely generated by the external axial force F, but should be obtained according to the balance condition between the axial load on the whole shaft (including the derived axial force F e to the radial load f). Let's analyze this problem
according to the radial balance condition of the force, it is easy to calculate the radial load f.. FA on the two bearings from the radial force F acting on the shaft from the outside. When the magnitude and position of F are determined, the radial load f.. F. That's for sure. By F., F. Derived axial forces F, F. The size of can be calculated according to the formula in table 13-7. The calculated value of F, is equivalent to the normal installation condition, that is, it is approximately equivalent to that all the rolling elements of the lower half circle are loaded (the actual working condition of the bearing is not allowed to be less than this
2. The other end is marked as bearing 1. Take the shaft and its matching bearing inner ring as the separating body, if the axial balance is achieved, it should meet the requirements of
F. + FA = FA
If FA and F are obtained according to the formula in table 13-7. When the above relation is not satisfied, the following two situations will appear:
when f u+ F& gt; F The shaft has a tendency to move to the left, which is equivalent to that bearing 1 is "pressed" and bearing 2 is "relaxed". But in fact, the shaft must be in a balanced position (that is, the bearing seat must exert an additional axial force through the bearing elements to prevent the shaft from moving), so the total axial force F on the "pressed" bearing 1. Must be with F. + F. Phase equilibrium, i.e.
F = F. + F.
when the equivalent dynamic load P of each bearing is calculated according to equation (13-8a), the radial load f is the radial load generated on each bearing by the radial force F acting on the shaft from the outside; However, the axial load F. is not completely generated by the external axial force F, but should be obtained according to the balance condition between the axial load on the whole shaft (including the derived axial force F e to the radial load f). Let's analyze this problem
according to the radial balance condition of the force, it is easy to calculate the radial load f.. FA on the two bearings from the radial force F acting on the shaft from the outside. When the magnitude and position of F are determined, the radial load f.. F. That's for sure. By F., F. Derived axial forces F, F. The size of can be calculated according to the formula in table 13-7. The calculated value of F, is equivalent to the normal installation condition, that is, it is approximately equivalent to that all the rolling elements of the lower half circle are loaded (the actual working condition of the bearing is not allowed to be less than this
2. The other end is marked as bearing 1. Take the shaft and its matching bearing inner ring as the separating body, if the axial balance is achieved, it should meet the requirements of
F. + FA = FA
If FA and F are obtained according to the formula in table 13-7. When the above relation is not satisfied, the following two situations will appear:
when f u+ F& gt; F The shaft has a tendency to move to the left, which is equivalent to that bearing 1 is "pressed" and bearing 2 is "relaxed". But in fact, the shaft must be in a balanced position (that is, the bearing seat must exert an additional axial force through the bearing elements to prevent the shaft from moving), so the total axial force F on the "pressed" bearing 1. Must be with F. + F. Phase equilibrium, i.e.
F = F. + F.
2. If only the axial force inside the bearing is considered, there are: FA1 & gt; Fa2
please accept, thank you!
please accept, thank you!
3. The simple algorithm is resultant force, and the vector algorithm can be used for precise points
4. The theory of deep groove ball bearing does not derive axial force, but it will be subject to slight axial force in the process of practical application, because it has a certain centering effect. After the axial force disappears, it will return to the original position
the size of the axial force should be related to the actual working environment. After the axial force is applied, the force of the ball bearing is equivalent to having a contact angle, which is similar to the angular contact ball bearing. The axial force also has a great relationship with the clearance and radius of the bearing itself
especially the clearance, the larger the clearance is, the larger the range of motion of the ball in the axial position is, that is, the larger the axial clearance is, the greater the axial force it can bear, but the clearance can not be blindly large
in a word, I can tell you that the axial force is far less than the radial force. As for the specific calculation, because the contact angle is unpredictable, there is no way to know
the selection of deep groove ball bearing is unreasonable if the bearing is subjected to radial load and continuous axial load at the same time, because continuous axial force will rece the service life of deep groove ball bearing. Angular contact ball bearing or tapered roller bearing can be selected according to rotating speed and other instries and mines, and four point contact ball bearing can also be selected if bidirectional axial force is required, Double row tapered roller bearing or double row angular contact ball bearing.
the size of the axial force should be related to the actual working environment. After the axial force is applied, the force of the ball bearing is equivalent to having a contact angle, which is similar to the angular contact ball bearing. The axial force also has a great relationship with the clearance and radius of the bearing itself
especially the clearance, the larger the clearance is, the larger the range of motion of the ball in the axial position is, that is, the larger the axial clearance is, the greater the axial force it can bear, but the clearance can not be blindly large
in a word, I can tell you that the axial force is far less than the radial force. As for the specific calculation, because the contact angle is unpredictable, there is no way to know
the selection of deep groove ball bearing is unreasonable if the bearing is subjected to radial load and continuous axial load at the same time, because continuous axial force will rece the service life of deep groove ball bearing. Angular contact ball bearing or tapered roller bearing can be selected according to rotating speed and other instries and mines, and four point contact ball bearing can also be selected if bidirectional axial force is required, Double row tapered roller bearing or double row angular contact ball bearing.
5. In a strict sense, cylindrical roller bearing should not bear axial force in practical application, otherwise it will proce abnormal stress at raceway angle and cause bearing damage. The function of rib is actually used to guide roller end face. In fact, certain axial force has no relationship with the axial influence of bearing rib, lubrication state, working temperature and heat dissipation condition. In practical application, cylindrical roller bearing should be used together with other bearings which can bear axial load.
6. Open the official website of Xiaomi, drop down to the following online customer service, select online customer service, describe the problems you encounter, and then customer service will help you find them
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9.
bus line: Metro Line 1 → No. 502, the whole journey is about 10.1km
1, walk about 830m from Taijiang square to Da station
2, take Metro Line 1, pass 2 stations, reach Sansanjie station
3, walk about 440m, reach shangsanlukou station
4, take No. 502, pass 8 stations, reach Jianxin South Road Station
5, walk about 520m, Arrive at Fuzhou Strait Olympic Sports Center
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