- In Fig 2 The Tension On The Slack Side Of The Left Pulley Is 20 Of That On The Tight Side The Shaft Rotates At 720 R 1 (79.7 KiB) Viewed 32 times
- In Fig 2 The Tension On The Slack Side Of The Left Pulley Is 20 Of That On The Tight Side The Shaft Rotates At 720 R 2 (67.23 KiB) Viewed 32 times
- In Fig 2 The Tension On The Slack Side Of The Left Pulley Is 20 Of That On The Tight Side The Shaft Rotates At 720 R 3 (31.41 KiB) Viewed 32 times
In Fig. 2, the tension on the slack side of the left pulley is 20% of that on the tight side. The shaft rotates at 720 r.p.m. Select from SKF catalog a pair of appropriate radial or deep groove ball bearings to support the shaft at O and B for 99% reliability and a life of 24000 h. Note: (1) The application (service) factor recommended for belt is 2. (2) Assumed the shaft is made of commercial steel with allowable shear stress of 50 MPa. The values of shock and fatigue factors are k, = 2.0 and k, = 1.5. (3) The size of the shaft can be determined using the following formula 16 d³= √(k₂Mb) ² + (k₁ M.)² TT all 200. 500 diam 500. 800 N 650 diam 100 N 100 B
02: The proposed layout of a brake to be rated at 240 N-m torque at 600 r.p.m is shown in Fig. 1. The assumed drum diameter is 200 mm the angle of contact for each shoe is 120°. The coefficient of friction may be assumed as 0.3 and for the conditions of service a pv value of 1.9274 (N-m per mm² of projected area per second may be assumed. Determine the following: (1) Spring force F, required to set the brake. 5.5 (2) The width of shoes. (3) If the obtained results affected in case of 53.5 rotation direction of the drum is reversed (counterclockwise). Prove your answer with specified values. N. W 3 N AV fy FRI Nim 51 100 150 150
Steel (AISI 1010) plates of thickness 8 = 6 mm and length L = 1 m on a side are conveyed from a heat treatment process and are concurrently cooled by atmospheric air of velocity u = 10 m/s and T = 20°C in parallel flow over the plates. Ti- Auto Air Uoor Too 8 -Conveyor L