Question

Q-1 The shaft shown in figure below, supported by and turns in the bearings A and B. The dimensions of the shaft are a = 120 mm and b = 30 mm. The forces on the bevel (conical) gear attached to the shaft are W_t = 4500 N, W_r = 2500 N, and W_a = 1000 N. The gear forces act at a radius R = 100 mm from the shaft axis.

1. Determine the loads applied to the bearings (F_rA and F_rB).                 [16 pts.]
2. Use a design life L_D = 10000 hours, a design speed, n_D = 900 rev/min, an overall reliability of 99 %, and an application factor, a_f = 1.2, and specify appropriate angular-contact ball bearings for both A and B;                                                             [20 pts.]                       [
3. Determine and explain the resulting overall reliability of the pair of the specified bearings.

                                                                                                                      

Wr Wa bearing-A Wt bearing-B ta

notes :

• Use appropriate units as it applies (mm, MPa, N, mm², mm³, mm⁴, N-m, etc.);
• In your solutions, give reference to figures, tables, and formulas used (if any!)
• Must show the unit associated with each answer;

Answer 1

Givren data:- wo ul 4So0 o) lSo

1000 oo ㄷ5166.6于 SU 1333, 33 SU 1 SO ob Iam Tade 11.6 m Fae. にβ 4-6 1。6T < Q202.9 We ure umer .equatrèmx 9づ. Table t.i⅛hug (+リ(mm) o-4AX 3338.98

The 스 10000 h 6 万千。 - 12 x 39x13.5) CI.. 63,24.ナN Clo 63-1* KN A , în ‘2.serie, f rgular cmtur bea.in eam with bore Size (S .

…ty.YI 9 (1.-RD 5千0 a bove Seles

overalll tabity 483 449 4,429 Ro - 0.qj043 0,996432. D .483 540 63구 xtos 439 eie -than The ral vlib the e A beo)