A spur gear of average radius 2.5 in and bevel gear of average radius 5.0 in...
I. The countershaft shown in the Fig Q1 has two spur gears mounted on it with teeth cut wi a 20 pressure angle. The shaft (grooved) is to be made of cold-drawn AISI 1040 steel havin Sut 779 MPa and S,-593 MPa, an elongation of 19% and HB-262. You are asked to size the shaft for safe operation according to DE-Elliptic criterion by using a factor of safety of 2.5 and a reliability of 99 percent. The stress-concentration factors for...
1. The countershaft shown in the Fig QI has two spur gears mounted on it with teeth cut with a 20 pressure angle. The shaft (grooved) is to be made of cold-drawn AISI 1040 steel having Sut= 779 MPa and S,-593 MPa, an elongation of 19% and HB-262. You are asked to size the shaft for safe operation according to DE-Eilliptic criterion by using a factor of safety of 2.5 and a reliability of 99 percent. The stress-concentration factors for...
Solve in SI units.
A gear reduction unit uses the countershaft shown in the figure.
Gear A receives power from another gear with the transmitted force
FA applied at the 20ᵒ pressure angle as shown. The power is
transmitted through the shaft and delivered through gear B through
a transmitted force FB at the pressure angle shown. a) Determine
the force FB, assuming the shaft is running at a constant speed. b)
Find the magnitudes of the bearing reaction forces,...
Extra Credit) A gear reduction unit uses the countershaft shown in the figure. Gear A receives power from another gear with the transmitted force FA applied at the 20° pressure angle as shown. The power is transmitted through the shaft and delivered through gear B through a transmitted force FB at the pressure angle shown. (a) Determine the force FB, assuming the shaft is running at a constant speed. (b) Find the magnitudes of the bearing reaction forces, assuming the...
The rotating solid steel shaft is simply supported by bearings at points B and C and is driven by gear (not shown) which meshes with the spur gear at D, which has a 150-mm pitch diameter. The force F from the drive gear acts at a pressure angle of 20". The shaft transmits a torque to point A of TA = 340 N.m. The shaft is machined from steel with Sy= 420 MPa and Sut = 560 MPa. The fatigue...
ME 350-001 STATIC MACHINE COMPONENTS Spring 2019 Dr. Todd January 18, 2019 Shear and Bending Moment Diagrams The figure shows a 1-in. solid round shaft supported by self-aligning bearings at A and B. Attached to the shaft are two chair sprockets that are loaded as show. Treat this as a static loading problem, ignoring fatigue and stress concentrations. Also, ignore the shear load and stress. Draw shear force and bending moment diagrams and determine the magnitude and location of the...
Problem 3: Draw the shear force diagram (SFD) and bending moment diagram (BMD) for the 3-in in diameter shaft and determine the absolute maximum bending stress in the shaft. The shaft is supported by a thrust bearding at A and a journal bearing at B. 3600 lb 1800 lb B 3ft 3ft 3ft
a. Draw a free-body diagram for the beam shown above and derive
expressions for the support reactions at A and B
b. Draw internal force (shear and bending moment) diagrams.
c. If a = 10 ft and M0 = 200 ft-lb, use the dimensions of the
beam cross-section, provided on the previous page, to compute the
maximum flexural and shear stresses on the beam cross-section.
d. If the allowable bending stress is 925 psi and the allowable
shear stress is...
Question 2: [20 Points) The Figure below shows a portion of a pump that is gear driven at uniform load and speed. The shaft is supported by bearings mounted in the pump housing. The shaft is made of steel, its yield strength is 800 MPa and its ultimate tensile strength is 1000 MPa. The surface of the shaft is machined. Due to the fillet at A, the fatigue bending stress concentration factor is 2.0, the fatigue torsion stress concentration factor...
Please help.
Thx
Part 2 (50 pts) A single-reduction spur gear system is as shown. The pinion "P" drives gear "G. Pinion"Pis driven at 1800 rpm with 1.5 hp Pinion "P" has a pitch diameter of 2 inches, and has 20 teeth. The gear "Ghas 120 teeth. All teeth have a pressure angle of 20, full-depth, hobbed profile, and a face width of 0.5 inches. All materials are steel. Determine: A) Minimum number of pinion teeth: Np,min This shows that...