Kloubová oka Fluro

19 FLURO ® -Gelenklager GmbH Technical Information (C/F) min (3) F m = 0,1 F 1 2 . t 1 + F 2 2 . t 2 +....) [kN] Force F [kN] : time component t [%] therefore the following must be valid: F i , max ≤ F r , max according to (6) In case of an additional axial load the equivalent bearing load is calculated according to formula (4). (4) F e = F m + Y . F a [kN] Axial factor Y according to table 2 F a ≤ F a , max according to (6a) Selection of the bearing size The selection is usually made step by step, repeated if necessary, by comparing - 1. the load ratio involved with the normal minimum values for that ratio; 2. the forces affecting the bearing and the maximum permitted load of the bearing proposed; 3. the maximum surface pressure and the surface pressure on the proposed bearings; 4. the maximum glide speed and the glide speed involved of the bearing proposed; 5. the specific performance of the bearing involved with the published catalogue limits. Re 1: The load ratio (C/F) is a value for a specific use of a bearing according to formula (5). (5) (C/F) exist ≥ (C/F) min The common minimum values for (C/F) for different antifriction surfaces as listed in table 3, can be used to establish the required dynamic load rating C in accord- ance with formula (5a) by changing formula (5). By this means a suitable bearing size can be selected from the tables of this catalogue. St/Ms St/Bz St/St St/TBz St/TNy 2 2 2 1,75 1,5 Table 3: Typical load ratios (5a) C reg ≥ (C/F) min . F exist [kN] Picture 3: Pivoting and oscillating angle In the case of a constant load F r , F a a dynamically equivalent bearing load F e can be established in accordance with formula (2). (2) F e = F r +Y . F a [kN] therefore: F e ≤ F r , max according to formula (6); F a ≤ F a , max (6 a ) The axial factor Y in table 2 is dependent on the load ratio. Load ratio F a : F r 0,1 0,2 0,3 0,4 0,5 Axial factor Y 0,8 1 1,5 2,5 3 Table 2: Axial factor Y In the case of a variable load (picture 4), formula (4) can be used to calculate a mean dynamic bearing load F m from the individual load levels F i and the appropriate time factor t i . Picture 4: Variable load against time insert Pivoting angle Housing oscillating angle Ball Time