2. A V belt is designed to work under the conditions: transfer power P=10KW, input rotating speed n=1450r/min. Given tensile load on tight side is Fi=1300N, and diameter of small belt wheel is di=170mm. Please calculate the pretension load Fo.
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- In a thrust bearing, the external and the internal diameters of the contacting surfaces are. 19 mm and 200 mm respectively. The total axial load is 80 kN and the intensity of pressure is 350 kN/m?. The shaftrtates at 400 rpm. Taking the coeffic. : of fricieơn as 0.Q6 calculate the power lost fi overcoming the frP. Con. Also, find the number of collars required for the bearing. rrsThe larger diameter and face of the disk of a multiple disk chutch are 225 mm and 20 mm respectively. The load applied to the spring of the clutch axially is 1500 N. Assuming that there are 8 pairs of friction 0.18 and tuning 800 rpm. Find the power transmitted by the clutch using uniform pressure method. (Ans, 13.67 kW)A differential cylinder with the area ratio of 2.5:1 is to lift 50 kN 500 mm in 4 secs. The maximum system pressure for the pump is to be 160 bar. Calculate the piston diameter and find the piston rod diameter dst. On the basis of the piston rod diameter dst, find the maximum possible stroke. (length) from the buckling resistance diagram. In addition, calculate the advance and return speeds for the piston and the pump delivery. The mechanical, hydraulic efficiency of the cylinder amounts to n= 0.90. Pipe loss amounts to 6 bar, pressure drop in the directional control valve 2 bar and back pressure from the return movement 2 bar. 2:1 HEM m 500mm
- A 3 x 8 member in a diaphragm resists a tension force caused by the lateral wind pressure. Lumber is Select Structural DF-L. A single line of 7/8 in. diameter bolts is used to make the connection of the member to the diaphragm. Cu = 1.0, C = 1.0, and C = 1.0. Find: a. The maximum axial tension load using ASD. b. The factored axial tension capacity using LRFD. Hint: This is a horizontal member with sheathing on top. Think carefully about orientation when computing the net area.Q2: Design a torsion spring with an initial torque of T, =2000Nmm and a maximum torque of T2 =8000Nmm. The minimum angular deflection is oi 10 and the maximum angular deflection is p2 =400. The spring is to be installed in a steadily operating machine.I need the answer quickly
- Find unknown forces pls . Step by stepA helical compression spring has a scale of 500 lb/in., an outside diameter of 2.75 in, a free length of 8 inches and with squared and ground ends. The load is 1,000 lbs and the working stress on the wire material is 65000 psi. If the Wahl factor of 1.25 is to be used, calculate the following: A. The standard wire diameter B. The number of active coil if G = 10 800 000 psi C. The solid height D. The stress at solid heightA helical compression spring is wound using 0.12-in-diameter phosphor-bronze B159 wire. The spring index C = 10 and the total number of coils is N = 14. You may assume that the spring has both ends squared and ground and is supported between fixed ends. Also, Sgy = 0.45 · Sut- a. Estimate the spring rate. b. Estimate the static load corresponding to the yield strength. c. What should the free length of the spring be to ensure that when it is compressed solid the torsional stress does not exceed the yield strength? d. Calculate the critical value of the free length of the spring to avoid buckling.
- 3. A motor is connected by a belt to pulley B. T, is the tight-side tensile force equal to 1800 N. The shaft spins at a constant speed, 650 rpm. The power delivered by the motor is 12.6 kW. On pulley A, connected to the load, the slack side of the belt has a tension equal to th of the tight side. b T T, B d shaft Dimensions are as follows: da 200 тm 300 тт | 250 тm |180 тm | 250 тm 26 тm dB dahaft a We analyzed a problem similar to this on Test 01 using static failure theories. Is this strictly correct? Because the shaft is spinning, would not a material particle see a time-varying reversal of the the bending stress as in the R.R. rotating beam test? Would a particle see a reversal of the torsional shear stress? Assume Sut = 370 MPa and Sy = 300 MPa. Ignore Marin factors. Ignore stress concentrations. Ignore direct shear stress (that due to V). Find the safety factors with respect to fatigue and yielding. Be guided by section 6-14 on combined loading.EQUATION SHEET TABLE A-9 LINKS BELOW bartleby doesn't allow more than 2 pic uploads so i attached themneed it correctly