Kloubová oka Fluro

20 FLURO ® -Gelenklager GmbH Technical Information [ ] P L, max [W/mm 2 ] Picture 5: Oscillating angle ß relative to crank rotation d k . ß . f (9) v m, exist = 2 . b . f = [m/s ] 1000 . 57,3 . 60 Diameter of ball d k [mm] and f [1/min] In case where the bearing rotates fully ß needs to be substituted by 180°. The slip speed has to be less than the speed permissible listed in table 5. V max [m/s ] Oscillation Revolution Steel/Steel 0,15 0,10 Steel/Bronze (Brass) 0,25 1,00 Maintenance free 0,25 0,35 Table 5: Maximum slip speed Re 5: The product p.v can be defined as a specific bearing performance P L (see formula 10). Thus, an estimated value for the heat build-up per mm 2 of the Spherical Plain Bearing surface ist available, mainly dependent on the antifriction material combination, the lubrication/ cooling applied and the surface pressure and glide speed. By increasing temperate the allowable surface pressure of maintenance free bearings is decreasing (picture 1 and 4). (10) P L, exist = p exist . v exist Slip speed v according to (9) Surface pressure p according to (8) After the selection of the bearing the following is valid: P L, exist ≤ P L, max Steel/Bz, (Brass), (Steel) Maintenance free 0,5 1,3 Table 6: Maximum specific bearing performance N . m W mm 2 . s mm 2 = Re 2: When the existing force affecting the bearing is a static load, it can be used as is for a comparison. When it is a dynamic load, it can be calculated by using formula (2), (3) or (4). When a Rod End is mounted with a locking nut or retransfer with two nuts, the additional tensile stress at the male thread or the connecting rod has to be taken into consideration. However the static or dynamic load must always be smaller than the maximum permitted load, which is calculated from the static load rating C o using formula (6).This might have to be further reduced by the load factor f B (picture1) and the temperature factor f T (table4). Temperature C 80° 100° 150° 200° 250° Temperature F 176° 212° 302° 392° 480° greased 1 1 1 0,8 0,5 maintenance free 1 1 0,8 0,5 0,3 Table 4: Temperature factor F T (6) F r, max = C o . f B . f T [kN] (6a) F a, max = a . F r, max [kN] If no bearing size is given in the application the required static load rating can be established by changing formula (6) and a Rod End can be selected from the tables accordingly. (7) C o, reg ≥ F exist [kN] f B . f T Re 3: The load on a mating surface can be worked out by using formula (8). It must be less than the standard value for surface load according to the antifriction com- bination of materials, selected as listed in table (1). (8) p exist = p max / (C/F) exist [N/mm 2 ] p max acc.to table1, F acc.to formula (2),(3) or (4) Re 4: The existing average glide speed v m is calculated according to formula (9) using the frequency of rotation of the crank K and the glide distance of the Spherical Plain Bearing G. (At one rotation of K it corresponds to the double arc b between the centres 1 and 2 in Picture 5 and thus to the double maximum oscillating angle ß ). short temporary intervals only