countershaft in Prob. 3–72, p. 152, is part of a speed reducing compound gear train using...

countershaft in Prob. 3–72, p. 152, is part of a speed reducing compound gear train using
20° spur gears. A gear on the input shaft drives gear A. Gear B drives a gear on the output
shaft. The input shaft runs at 2400 rev/min. Each gear reduces the speed (and thus increases
the torque) by a 2 to 1 ratio. All gears are to be of the same material. Since gear B is the
smallest gear, transmitting the largest load, it will likely be critical, so a preliminary analysis
is to be performed on it. Use a diametral pitch of 2 teeth/in, a face-width of 4 times the circu-
lar pitch, a Grade 2 steel through-hardened to a Brinell hardness of 300, and a desired life of
15 kh with a 95 percent reliability.

1) if b is meshing with another gear with a diameter d=16 in what would be the required teeth on Fb?

2)Determine factors of safety for pitting

Expert Solution

samet mamat answered 2 years ago

A compound gear train with gears P, Q, R, S, T and U has number of...

A compound gear train with gears P, Q, R, S, T and U has number of teeth 10, 20, 02 40, 50, 80 and 100 respectively. Show the arrangement of gears for a speed reduction of 50% and determine the center distance between driving and driven shafts if the diametrical pitch of the gears is 0.5 I only have this question , cant give you more information

Design a speed-increasing gear train with a speed ratio of SPR defined below: Speed ration =...

Design a speed-increasing gear train with a speed ratio of SPR defined below: Speed ration = 13 The gear train does not need to be reverted. Specify the appropriate numbers of teeth to minimize the gearbox size while avoiding the interference problem in the teeth. Perform the analysis subject to the following constraints: A) Use a 20° pressure angle and match SPR exactly. B) Use a 25° pressure angle and match SPR exactly. C) Use a 20° pressure angle and...

A gearbox is to be designed with a compound reverted gear train that transmits 25 horsepower...

A gearbox is to be designed with a compound reverted gear train that transmits 25 horsepower with an input speed of 2500 rev/min. The output should deliver the power at a rotational speed in the range of 280 to 300 rev/min. Spur gears with 20? pressure angle are to be used. Assuming a diametral pitch of 6 teeth/in. Please show all steps. (a) Determine pitch diameters for each of the gears. (b) Determine the pitch line velocities (in ft/min) for...

Prob.3) A jet-powered aircraft flies at a speed of 320 m / s at an altitude...

Prob.3) A jet-powered aircraft flies at a speed of 320 m / s at an altitude of 9150 m, where the ambient conditions are 32 kPa and –32 ° C. The pressure ratio in the compressor is 12 and the temperature at the inlet of the turbine is 1,400 K. The air enters the compressor at a rate of 60 kg / s and the jet fuel has a calorific value of 42,700 kJ / kg. Assuming ideal operation for...

Part A Table of C-13 NMR data for 1-phenylcyclohexanol using the following headings for each compound...

Part A Table of C-13 NMR data for 1-phenylcyclohexanol using the following headings for each compound (carbon types: CH, CH2, CH3, CH-OH, etc) Chemical Shift (ppm) Carbon Type Part B Table of C-13 NMR data for 1-phenylcyclohexene using the following headings for each compound (carbon types: CH, CH2, CH3, CH-OH, etc): Chemical Shift (ppm) Carbon Type Give detailed explanation of the chemical Shift only and show the carbon labeled.

A process using a p-chart with L=3 has an in-control fraction defective of p=0.01. Sample size...

A process using a p-chart with L=3 has an in-control fraction defective of p=0.01. Sample size is 300. What is the probability of detecting a shift to an out-of-control value of p=0.05 for the first time on the second sample following the shift?

A firm that produces electricity using coal that emits pollution. For every part per million, P,...

A firm that produces electricity using coal that emits pollution. For every part per million, P, the firm is fined $10,000. However, it can invest in scrubbers, S, that cost $25,000 each and reduce pollution according to the formula P=10/S Explain how the firm should approach this problem. The cost of the fine is given by ($10,000)(P) or ($10,000)(10/S). So, each additional scrubber reduces the cost of the fine by $100,000/S2. Find the optimal number of scrubbers to invest in,...

A pump is being powered by a 3-phase asynchronous AC motor. Without using a variable speed...

A pump is being powered by a 3-phase asynchronous AC motor. Without using a variable speed drive, explain two ways that you can adjust the flow rate in the system. How does a VSD control the flow rate?

A hydrogen atom is in its second excited state, n = 3. PART A Using the...

A hydrogen atom is in its second excited state, n = 3. PART A Using the Bohr model of hydrogen, find the linear momentum. PART B Using the Bohr model of hydrogen, find the angular momentum of the electron in this atom.

The test statistic of z= -2.92 is obtained when testing the claim that p=3/8. a. Using...

The test statistic of z= -2.92 is obtained when testing the claim that p=3/8. a. Using a significance level of alpha=0.05, find the critical value(s). b. Should we reject Upper Ho or should we fail to reject Upper Ho? Please show how. im really confused.

Question