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Repeat Problem 15-7 for a double-dwell cam to move the roller follower from 0 to 2 inches in 45° with cycloidal motion, dwell for 150°, fall2 inches in 90° with modified sine motion, and dwell for the remainder. Cam speed is 200 rpm. Choose a suitable r spring rate and preload to maintain follower contact. Select a spring from Appendix D. Assume a damping ratio of0.15.
Problem 15-7.
Figure Pl5-l shows a cam-follower system. The dimensions of the solid, rectangular 2 X 2.5 in cross-section aluminum arm are given. The cutout for the 2-in-diameter , 1.5-in-wide steel roller follower is 3 in long. Find the arm mass, center of gravity location, and mass moment of inertia about both its CG and the arm pivot. Create a linear, one-DOF lumped mass model of the dynamic system referenced to the camfollower and calculate the cam-follower force for one revolution. The cam is a pure eccentric with eccentricity = 0.5 in and turns at 500 rpm. The spring has a rate of 123 lb/in and a preload of 173 lb. Ignore damping.
A 24-tooth gear has AGMA standard full-depth involutes teeth with diametral pitch of 5. Calculate the pitch diameter, circular pitch, addendum, dedendum, tooth thickness and clearance. All dimensions must be taken to 4 decimal places to account for m..
a steam turbine produces 3000 hp with a mass flow rate of 22000 pounds per hour. the steam enters at 1100 degf and 900
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refriger..
Design an end connection using longitudinal welds and an end transverse weld to develop the full tensile capacity of the angle shown. Use A36 steel and E70 electrodes.
Determine the mass p of ice per meter which can form on the cable without the maximum allowable tension being exceeded. If additional stretch in the cable is neglected, does the addition of the ice change the cable configuration?
A piston/cylinder assembly in a car contains 12 in3 of air at 13 lbf/in2 and 68 F. The air is compressed in a polytropic process with exponent n = 1.25 to a final volume six times smaller. Determine the final pressure and temperature, and the heat tr..
a gas refrigeration system using air as the working fluid has a pressure ratio of 5. air enters the compressor at 0
A child's pool is eight feet in diameter and two feet high. It is filled by a garden hose up to a level of one foot. The children complain that it is too cold. Can you heat it up to an acceptable temperature using hot water from the house? How muc..
Design a flow diagram (aircraft maintenance and inspection). How an aircraft mechanic can be properly trained using different instructional methods to inspect an aircraft structure. Instructional aids can be Computer Based, instruction led, on the..
mixture of saturated liquid and saturated vapor of substance water at 95oc enters steady flow adiabatic compressor and
a solid circular cylinder of radius r rotates at angular veolicity omega in a viscous incompressible fluid that is at
the structure of a house is such that it loses heat at a rate of 5400 kjh per degree celcius difference between the
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