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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Bearing conflict coefficient (see) Bearing conflict coefficient (see)
In order to facilitate comparison with sliding bearings; the conflicting moment of rolling bearings can be calculated according to the inner diameter of the bearing: /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
M = uPd / 2 (M: collision torque; mN. m, u: conflict coefficient; Table 1, P: bearing load; N, d: bearing nominal inner diameter; mm).
The conflict coefficient u is greatly affected by the bearing type, bearing load, rotation speed, smoothing method, etc.; the reference value of the conflict coefficient when the rotation is stable under normal conditions is as follows.
Regarding plain bearings; usually u=0.01-0.02; sometimes also 0. 1-0. 2.
Conflict coefficient of various types of bearings
Bearing type conflict coefficient u
Deep groove ball bearings 0. 0010-0. 0015
Angular touch ball bearing 0. 0012-0.0020
Self-aligning ball bearings 0. 0008-0.0012
Cylindrical roller bearings 0. 0008-0.0012
Full complement needle roller bearings 0. 0025-0. 0035
Needle bearing with cage 0.0020-0.0030
Tapered roller bearings 0. 0017-0. 0025
Spherical roller bearings 0. 0020-0. 0025
Thrust ball bearings 0. 0010-0. 0015
Thrust spherical roller bearings 0. 0020-0. 0025
4, the rolling bearing smooth method of the selection of rolling bearings is an important mechanical component; whether the function of a mechanical device can be fully played depends on whether the bearing is smooth or not; can be said; smooth is the necessary condition to ensure the normal operation of the bearing; It plays an important role in the bearing capacity and service life of progressive bearings. No matter which smooth method is used, smoothness can achieve the following effects in rolling bearings:
(1) Cut the conflict between metals; slow down their wear and tear.
(2) The composition of the oil film increases the touch area; reduces the touch stress.
(3) Ensure that the rolling bearing can be under high-frequency touch stress; operate normally for a long time; extend the fatigue life;
(4) Eliminate the heat of conflict; reduce the surface temperature of the bearing operation; avoid burns.
(5) It is dustproof, rustproof and anticorrosive.
Therefore, correct smoothing is very important for the normal operation of the rolling bearing. The smooth depiction of the rolling bearing mainly includes: the determination of a reasonable smooth method; the correct selection of the smoothing agent; the quantitative calculation of the amount of the smoothing agent and the determination of the oil change period. Smoothness can usually be divided into three categories: oil smooth, smooth grease and solid smooth. The oil smoother has a wider temperature range than other smooth methods; it is more suitable for high speed and high load operation. Bearings, together; because the oil is smooth, it also has the convenience of equipment protection and smoothing agent replacement, and the conflicts such as gears in the system can be smooth together; so far, the bearing oil is most smooth. The grease is smooth and has simple sealing equipment and repair costs. Low and smooth fat cost lower level of strength; used in low-speed, medium-speed, medium-temperature bearings, especially the advent of anti-wear additives in these years; improved grease smooth function; smoother grease has been more widely Use. If the oil is smooth and the grease is smooth, it will not be smooth. Pieces; or unable to meet certain conditions of work; it is possible to use solid smooth agent; or try to smooth the progress of the bearing itself functions.
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Bearing conflict coefficient (see)
Source: China Bearing Network Time: 2018-03-25