- F 3 2 A A 0 Fig 4 Problem No 1 Reduction Of Masses And Forces All Members Of Piston Mechanism See Figure Move I 1 (12.48 KiB) Viewed 24 times
- F 3 2 A A 0 Fig 4 Problem No 1 Reduction Of Masses And Forces All Members Of Piston Mechanism See Figure Move I 2 (50.45 KiB) Viewed 24 times
- F 3 2 A A 0 Fig 4 Problem No 1 Reduction Of Masses And Forces All Members Of Piston Mechanism See Figure Move I 3 (27.15 KiB) Viewed 24 times
Problem No. 1 Reduction of masses and forces All members of piston mechanism (see Figure) move in vertical plane (this plane is parallel to the plane of Figure). Besides, in Figures 0, 2, 4, 6 and 8 piston's axis is vertical, but in Figures 1, 3, 5, 7 and 9 piston's axis is horizontal. Resistance force F is applied to piston only during those motion stages, which correspond to reduction of chamber's volume. But in motion stages, corresponding to increase of chamber's volume, it is considered that force F = 0. Moment of inertia of wheel 1 is equal to J. Weights of mechanism's members are as follows: connecting-rod 2 - G2; piston 3 - G3. Connecting-rod 2 is assumed as a homogeneous rod with length / and weight G2. To draw mechanism in position corresponding to the given value of angle a. For the given mechanism position it is necessary to reduce all masses and forces to wheel 1 which angular velocity is assumed as o.
Variant 0 1 2 3 4 5 a 30° 60° 90° 120° 150 784 270 240° 270 300° I m) 0.6 0,8 1,0 1.2 J, (kgme) 10 15 20 25 30 35 0 45 50 55 G2 (N) 50 73 100 125 750 175 200 225 250 275 GN 20 40 60 80 100 120 7640 160 180 200 FKN) 1,0 1,5 2,0 2,5 3.0 3,5 OA (m) 0,20 0.25 0,30 0,35 0,40 0,45 7 8 9 4,5 5,0 5.5 1,6 7 2,0 2,2 2.4 0,55 0,60 0.65 9