In the crane system in the shape, the first stage is geared with a gearbox and a belt pulley system, the first stage of which is straight geared, the second stage is a helical gear. G load is to be lifted at a speed of 2m / s. 1st pulley diameter is ?d1 = 100mm and 2nd pulley diameter is ?d2 = 600mm. teeth numbers of spur gears Z1 = 18, Z2 = 81. The number of teeth of helical gears is z3 = 20 and Z4 = 80. The section circle diameter of the 4th gear is d04 = 180 mm, Ft43 = 5200 N, Fe43 = 7200 N, F?43 = 6000 N. efficiency in each of the belt pulley and gear wheels in the system 0.97,The efficiency of each pair of bearings is nt = 0.86 and drum efficiency is nt = 0.92. ?DT = 500mm and the dimensions of the shaft on which it is located are given as a = 240 mm, b = 160 mm vs L = 640 mm. The power of the motor that drives the system is N = 17kW. Assuming the life of the angular contact ball bearings from the 33 series of drum shaft, Lh = 20.000 operating series; Determine the A and B bearings.

Note: kasnak = pulleytambur = drum

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SORU: ekildeki vin sisteminde birinci kademesi dz dili, ikinci kademesi helisel dili olan bir redktr ve kay kasnak sistemi ile G yk 2 m/sn hzda kaldrlmak isteniyor. Kullanlan kasnaklarn, 1. kasnak aps d-100 mm ve 2. kasnak ap ise d: 600 mm dir. Dz dililerin di saylan Z1-18, Z-81, helisel dililerin di saylar ise Z3-20 ve Z4-80 dir. 4. dilinin blm dairesi ap do4-180 mm olup F,43=5200 N, F.43-7200 N ve F43-6000 N dur. Sistemdeki kay kasnak ve dili ark kasnak kademelerinin her birinde verim 0.97, her bir rulman iftinin verimi n-0,86 ve tambur verimi de 17-0,92 dir. Tamburun ap ODT-500 mm ve zerinde bulunduu milin boyutlar ise a=240 mm, b=160 mm ve L-640 mm olarak verilmitir. Sistemi tahrik eden motorun gc N-17 kW'dir. " Tambur milinin 33 serisinden eik bilyal yataklarn omrunu La-20000 iletme saldi kabul ederek A ve B yataklarn tespit ediniz. K M. kasnak Z Tambur N=17 (kW) nj Z Z- G F43 -Fes F43