۳/۱ العنوان O не شكا +91x PU + 96852 A heavy car plunges into a lake during an accident and lands at the bottom of the lake on its wheels as shown in figure. The door is 1.2 m high and I m wide, and the top edge of Deine the hadrostatic force on the Plot the displacement diagram for a cam with roller follower of diameter 10 mm. The required motion is as follows; 1- Rising 60 mm in 135° with uniform acceleration and retardation motion. 2- Dwell 90° 3- Falling 60 mm for 135° with Uniform acceleration-retardation motion. Then design the cam profile to give the above displacement diagram if the minimum circle diameter of the cam is 50 mm. = -20125 750 x2.01

Can you explain how this can be solved please. Thanks!

Exercises Q17 The camshaft of high speed pump consists of a parallel shaft 25 mm diameter and 480 mm long. It carries three eccentrics, each of diameter 60 mm and a uniform thickness of 18 mm. The assembly is symmetrical as shown in Figure(Q1) and the bearings are at A and B. The angle between the eccentrics is 120° and the eccentricity of each is 12.5 mm. The material density is 7000 kg/m3, and the speed of rotation is 1430 r.p.m. Find : 1. dynamic load on each bearing due to the out-of-balance couple; and 2. kinetic energy of the complete assembly. 80 80 25 Dia 120° 1202120° +18 -240- C 480 23 All dimensions in mm

A cam has the following characteristics: (a) It starts from dwell and ends in another dwell (b) In section I the cam has a parabolic profile: Y = Ay² + BY + C (c) In section I from 0 < y < 1/2 the cam rises to the height of ½ (d) In section Il the cam has a cubic profile: Y = Dy³ + Ey² + Fy + G (e) In section Il from 1/2 < y < 1 the cam rises to the height of 1 Write the non-dimensional boundary conditions for each section of the CAM but do not derive for the displacement equations

Q2. (80%) A plate cam must provide the displacement shown in Figure below to a reciprocating in-line roller follower. The roller diameter is 1.0 in. The cam must have a base circle of 3.0 in. and rotate clockwise. Graphically construct the profile. 1.2 1.0 0.8 0.6 - 0,4 - 0.2 + 0.0 - 30 60 90 120 150 180 210 240 270 300 330 360 Cam angle (deg) Cam Follower Cam Follower Cam Follower angle Displ. angle Displ. angle Displ. (deg) (in.) (deg) (in.) (deg) (in.) 0,000 130 0.971 250 0.337 10 0.000 140 0.996 260 0.196 20 0.000 150 1.000 270 0.091 30 0.000 160 1.000 280 0.029 40 0.004 170 1.000 290 0.004 50 0.029 180 1.000 300 0.000 60 0.091 190 0.996 310 0.000 70 0.196 200 0.971 320 0.000 80 0.337 210 0.909 330 0.000 90 0.500 220 0.804 340 0.000 100 0.663 230 0.663 350 0,000 10 0,804 240 0.500 360 0.000 120 0.909

A load is raised 11 ft by the gears and wheel system below. Gear A is initially rotating at rest and accelerates uniformly to omega = 24 rpm in t= 10 sec and maintain then maintain this constant 24 rpm speed. The dimensions are rA= 1 in, rB= 9 in and rC=16 in.   1) From 0 to 10 sec, find alphaA1, alphaC1 in rad/s^2, omegaA1(t), omegaC1(t) in rad/s, thetaA1(t), thetaB1(t) and thetaC1(t) in rad, and the distance made by the load s1 in inches and in feet made by the load during this time.  2) After 10 sec, find the distance s2 in feet and in NC es needed to reach the 11 ft, find thetaC2(t),  alphaA2, alphaB2 in rad/s^2, omegaA2(t), omegaB2(t) in rad/s, thetaA2(t),  in rad and the distance s2 in ft that should be made to get to the 11 ft raising distance of the load. 3) Deduce the number of revolutions made by gear A and how long it will take, to raise the load up to 11 ft. In the box below, give the time it takes to raise the load in seconds, with one decimal.

A load is raised 11 ft by the gears and wheel system below. Gear A is initially rotating at rest and accelerates uniformly to omega = 24 rpm in t= 10 sec and maintain then maintain this constant 24 rpm speed. The dimensions are rA= 1 in, rB= 9 in and rC=16 in.   1) From 0 to 10 sec, find alphaA1, alphaC1 in rad/s^2, omegaA1(t), omegaC1(t) in rad/s, thetaA1(t), thetaB1(t) and thetaC1(t) in rad, and the distance made by the load s1 in inches and in feet made by the load during this time.

Pravinbhai

.A steam engine develops power at mean torque of 18,000 N-m and velocity of 9 m/s. The mean diameter of the flywheel rim is 1.3 meters. The coefficient of fluctuation of speed is 0.03 and the coefficient of fluctuation of energy is 0.21. Determine the thickness of the rim in mm if the width of the rim is twice of its thickness. Assume density of rim material as 7250 kg/m3.