41. The cross-section of the turbine rotor disc is de.signed for uniform strength under rotation conditions. The disc is kevedto a 60 mm diameter shaft at which point its thickness is a maximum. Itthen tapers to a minimum thickness of 10 mm at the outer radius of 250mm where the blades are attached. If the design stress of the shaft is 250MN / m² at the design speed of 12,000 r.p.m., what is the required maxi-mum thickness ? For steel p = 7470 kglm³.

Given Density = 7470 kg/m3 Design stress = 250 MN/m2 Diameter, d = 60 mm Speed, N =…

41. The cross-section of the turbine rotor disc is de- igned for uniform strength under rotation conditions. The disc is keved pa 60 mm diameter shaft at which point its thickness is a maximum. It hen tapers to a minimum thickness of 10 mm at the outer radius of 250 am where the blades are attached. If the design stress of the shaft is 250 IN/m² at the design speed of 12,000 r.p.m., what is the required maxi- aum thickness ? For steel p = 7470 kg/m³.

41. The cross-section of the turbine rotor disc is de- igned for uniform strength under rotation conditions. The disc is keved pa 60 mm diameter shaft at which point its thickness is a maximum. It hen tapers to a minimum thickness of 10 mm at the outer radius of 250 am where the blades are attached. If the design stress of the shaft is 250 IN/m² at the design speed of 12,000 r.p.m., what is the required maxi- aum thickness ? For steel p = 7470 kg/m³.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Finding the value of sectional modulus of shaft having diameter 3 m
SS 304 steel shaft is 3 m long and has an outer diameter of60 mm. When it is rotating at 60 rad/s, it transmits 30 kWof power from the engine to the generator. Determine thefollowing: a. The smallest thickness of the shaft if the allowableshear stress is 150 MPa and the shaft is restricted notto twist more than 0.08 rad. Use G for steel = 83 GPa. b. The percentage savings in weight had the generatorutilized a solid shaft. Assume same material, length andtorque capacity.
A hollow shaft for a rotary compressor is to be designed to transmit a maximum of torque of 4750 N-m. The shear stress in shaft, if the ratio of the inside to the outside diameter is 0.4
Obtain a preliminary design of the shaft by performing the following tasks. Note that forces T1=2880 N and T=432 N. The maximum bending moment is at x= 230 mm (point B), and it equals M= 698.3 N•m completely reversed, where the torque is constant at 612 N.m at the same point. The shaft material is AISI 1020 CD steel. Take the stress concentration conditions at B to be Shoulder fillet-sharp, with notch radius r=0.6 mm (Table 7-1). 230 mm T, 280 mm 30-mm dia. T, 300 mm 250-mm dia. 400-mm dia. 270 Nx 1800 N a) Sketch a general shaft layout in 2D (x – y axes), including all components and torques, then calculate all reactions. : b) Based on the current shaft dimensions and using only forces at B and C, find the lowest critical speed of the shaft. (; c) Determine the fatigue factor of safety of the rotating shaft with the current dimensions using the DE-Gerber criteria. Use Eqs. 6-8 and 6-18 to find the endurance limit, account only for ka and k, in Eq. 6-18 and assume all remaining factors…
A pipe with an outside diameter of 55 in. and an inside diameter of 5.067 in. is subjected to an axial force of P,-660 lIb, a horizontal force of P,-1520 lb, and a concentrated torque of T-2770 lb-in, acting in the directions shown. Assume a- 29 in. Section properties for the pipe are A-35936 in2, J-25.1213 in.", and I,-1,-12.5606 in.. Determine the normal and shear stresses at point K, and show these stresses on a stress element K T. Answer: psi Ty" psi
The solid steel shaft is supported by the frictionless customer on D and E. This system The mile provided 5 kW of power in w dev / second and was connected to a motor at C. wwww ww www ww ww www wwwm www w A and B If gears get primary 2 kW and 3 kW, determine the minimum shaft diameter. w rotation speed and The safety shear stress is known and is included in the table below. pictures. wwww ww wwwwwwwww www wwwwww wwwwwwww wwwwwwwww w(cycle/second) = 100 tem(Mpa) = 40 3 kW 5 kW 2 kW A D B E C _
Design a hallow shaft (Diameter and length) that develops 80 kW of power while rotating at a speed of 4000 rpm. The design constrains are as under:The angle of twist not to exceed 0.200Shear stress is not to exceed 480 MN/m2The outer diameter is to be twice the inner diameter. The shaft length is to be three times the outer diameter. Modulus of rigidity = 79 GN/m2.
a solid shaft is transmitting 1 mw at 240 rpm determine the daimeter of shaft exceed the mean of torque 20% take maximum shear alloy stress as 55mpa
The diameter of shaft is 45mm. Compare the shear stress in the key to the torque in the shaft. calculate the key size to use for the 15 kW low speed shaft with a speed of 384 rpm. Take bxb = 10mm x 10mm as d = 45mm L = 1.5 cm.
25. The shaft of an axial flow rotary compressor is subjected to a maximum torque of 2000 N-m and a maximum bending moment of 4000 N-m. The combined shock and fatigue factor in torsion is 1.5 and that in bending is 2. Design the diameter of the shaft, if the shear stress in the shaft is 50 MPa. Design a hollow shaft for the above compressor taking the ratio of outer diameter to the inner diameter as 2. What is the percentage saving in material ? Also compare the stiffness. [Ans. 96 mm; 98 mm, 49 mm ; 21.84%; 1.018]
Q/A shaft supported at the ends in ball bearings carries a straight tooth spur gear at its mid span and is to transmit 7.5 kW at 300 r.p.m. The pitch circle diameter of the gear is 150 mm. The distances between the centre line of bearings and gear are 100 mm each. If the shaft is made of steel and the allowable shear stress is 45 MPa, determine the diameter of the shaft. Show in a sketch how the gear will be mounted on the shaft; also indicate the ends where the bearings will be mounted? The pressure angle of the gear may be taken as 20°.
An automobile engine develops a maximum torque of 162Nm. The low gear ratio of transmission is 2.75, while the back axle ratio is 4.25. The effective wheels radius is 0.325m and the co-efficient of friction between the tyre and the road surface is 0.6. If the permissible shear stress is 32373 X 104Pa. Determine the maximum shaft diameter. Assuming that the load is nearly torsional. What is maximum load permissible on each wheel?