Drawing accounting of non-liquid sliding bearings

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Drawing accounting of non-liquid sliding bearings

Source: China Bearing Network Time: 2013-03-13
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The bearing with smooth grease and smooth oil is used; because the oil quantity is not satisfied; it is difficult to produce a good oil bearing film between the relative movements; the bearing can only work in the mixed conflict state; it belongs to the non-liquid sliding bearing. The primary failure mode is wear and gluing; the second is external crushing and pitting. Therefore, the bearing accounting principle is: protecting the bearing data and the gap oil film body; controlling the uniform pressure p of the bearing, the sliding speed v and the product pv Does not exceed the allowable value; that is:
p ≤ [p], v ≤ [v], pv ≤ [pv]
Where: [p], [v], and [pv] are permissible values ​​for radial bearings:
p=F/(Bd), v=Ï€dn
Where: F-bearing load, B-bearing width, d-shaft diameter, n-axis speed.
About thrust bearings:
p=F/{(π/4)(d2-d02)ξ},v=π{(d+d0)/2}n
Where: d and d0 - the outer diameter and inner diameter of the ring touch surface; generally d0 = (0. 6 ~ 0. 8) d, ξ - think of the coefficient of the touch area reduced by the oil groove; generally ξ = 0. 8~0. 9.
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