2. A pair of rolling cylinders transmit a rotation between two shafts with a speed ratio...
U Question 4 20 pts Two helical gears have shafts at 90° and a speed ratio of 3:1. The smaller gear has a helix angle of 37.5%. Nq=20 teeth, and Pan=5. The larger gear has a helix angle of 52.5º. Find the center distance in inches.
Two helical gears have shafts at 90° and a speed ratio of 3:1. The smaller gear has a helix angle of 37.5°, N =20 teeth, and Pon=5. The larger gear has a helix angle of 52.5º. Find the center distance in inches,
The gearbox shown here is used to change the speed of rotation. Two shafts support gears B and E wit What is the shear stress in shat DEF, which is solid and has a diameter of 4 cm? 2
3. Two solid cylinders with different radii (r and 2r) and lengths (21 and 1) and the same mass spin on an axle at the same angular speed (wo) in opposite directions (assume they are spinning on frictionless bearings). Christian slowly brings the two cylinders together (without affecting their rotation). The friction between the flat surfaces results in the cylinders having the same angular velocity. a. Determine the magnitude of the final angular velocity in terms of wo. b. By...
Consider two concentric, infinitely long cylinders. The cylinders are oriented such that the center-line is along the z-axis, and the radii exist in the r-direction. The inner cylinder has a radius of ra and the outer cylinder has a radius Tb. The inner cylinder rotates with an angular velocity of w whereas the outer cylinder is stationary. There is no pressure gradient applied nor gravity. The fluid contained between the cylinders is assumed to be Netwonian, incompressible, isotropic and isothermal....
A two stage reduction drive is to be designed to transmit 2 kW; the input speed being 960 r.p.m. and overall reduction ratio being 9. The drive consists of straight tooth spur gears only, the shafts being spaced 200 mm apart, the input and output shafts being co-axial. (a) Draw a layout of a suitable system to meet the above specifications, indicating the speeds of all rotating components. (6) Calculate the module, pitch diameter, number of teeth, blank diameter and...
An incompressible Newtonian fluid is contained between two long concentric cylinders of radii AR (< 1) and R, as shown in the figure. The inner cylinder rotates with an angular velocity Ω (a) Compute the velocity distribution between the cylinders. End effects caused by (b) Compute the torque required to hold the outer cylinder stationary. (8 Pts)
An incompressible Newtonian fluid is contained between two long concentric cylinders of radii AR (
Bridging Problem: Oscillating and Rolling Two uniform, solid cylinders of radius R and total mass M are connected along their common axis by a short, light rod and rest on a horizontal tabletop (Figure 1). A frictionless ring at the rod's center is attached to a spring of force constant k, the spring's other end is fixed. The cylinders are pulled to the left a distance I, stretching the spring, then released from rest. Due to friction between the tabletop...
Consider two concentric, infinitely long cylinders. The cylinders are oriented such that the center-lines are along the z-axis, and the radii exist in the r-direction. The inner cylinder has a radius of r, and the outer cylinder has a radius rb. The inner and outer cylinders are stationary. Gravity exists in the negative z- direction, whereas a constant pressure gradient exists in the positive z-direction. The fluid contained between the cylinders is assumed to be Netwonian, incompressible, isotropic and isothermal....
2. A roller chain is to transmit 80 kW at a speed of 700 rpm. Reduction ratio is 5. Driven machinery may cause heavy shock loads while the driving motor has normal torque characteristics. Center distance should be within 550 ± 40 mm and chordal speed variation should be 2.5%. Design the power transmission system
2. A roller chain is to transmit 80 kW at a speed of 700 rpm. Reduction ratio is 5. Driven machinery may cause heavy shock...