Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Chapter 17, Problem 28P
To determine
The resulting centre to centre distance.
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A small model of a water pump has the ff. performance characteristics:D1 = 9in; N1 = 1760 RPM; Q1 = 562.5 GPM; BP1 = 15 hpIf a larger model geometrically similar to the small pump is to be used to deliver kerosene (S.G. = 0.80) at 1200 GPM at speed of 1500 RPM, what is the required impeller diameter in inches for the larger pump? what is the required brake horsepower for the larger model?
A differential cylinder with the area ratio of 2.5:1 is to lift 50 kN 500 mm in 4 secs. The
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An industrial water shutoff valve is designed to operate with 10 N of effort force on the wheel. The valve will encounter 30 N of resistance force applied to an axle that is 0.35 m in diameter. What is the required diameter of the wheel?
Chapter 17 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 17 - Example 17-2 resulted in selection of a 10-in-wide...Ch. 17 - A 6-in-widc polyamide F-l flat belt is used to...Ch. 17 - Prob. 3PCh. 17 - A flat-belt drive is to consist of two...Ch. 17 - In solving problems and examining examples, you...Ch. 17 - Return to Ex. 17-1 and complete the following. (a)...Ch. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - Two shafts 20 ft apart, with axes in the same...
Ch. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - A designer has to select a metal-belt drive to...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - Two B85 V belts are used in a drive composed of a...Ch. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - The geometric implications of a V-flat drive are...Ch. 17 - A 2-hp electric motor running at 1720 rev/min is...Ch. 17 - The standard roller-chain number indicates the...Ch. 17 - Prob. 24PCh. 17 - A double-strand no. 60 roller chain is used to...Ch. 17 - A four-strand no. 40 roller chain transmits power...Ch. 17 - Prob. 27PCh. 17 - Prob. 28PCh. 17 - Prob. 29PCh. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Prob. 33PCh. 17 - For Prob. 17-29 estimate the elongation of the...
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- A pump has a displacement volume of 6 in^3. It delivers 24 gpm at 1000 rpm and 1000 psi. If the prime mover input torque is 1100 in • lb, what is the theoretical torque required to operate the pump in in-lbs?arrow_forwardAs a junior field engineer, you have been asked to assist a contractor in resolving the following problem. A 4.9 kW motor and gear drive rated at 175 rpm has been shipped with the four impeller blades listed below. The baffled rapid mix tank to which one of the impellers will be installed is 3.0 m² in volume (1.56 m diameter and 1.56 m depth). Assume water temperature of 10C, G= 1000s, water density = 1000 kg/m³, and motor power to water power transfer efficiency of 80%. Impeller options: A. Axial flow, 3 blades, diameter = 0.48 m, N₁-1.0 B. Axial flow, 3 blades, diameter = 0.61 m, Np=1.0 C. Radial flow, 6 blades, diameter = 0.48 m, Np=6.3 D. Radial flow, 6 blades, diameter = 0.61 m, Np 6.3 Answer the following: 3. What is the rotational speed (n) in rps? b. What is the power required in kW for impeller option A? What is the power required in kW for impeller option C? C. d. What is the power transferred to the water from the selected motor in kW? e. Which impeller should be used?…arrow_forwardA small model of a water pump has the ff. performance characteristics: D1 = 9in; N1 = 1760 RPM; Q1 = 562.5 GPM; BP1 = 15 hp If a larger model geometrically similar to the small pump is to be used to deliver kerosene (S.G. = 0.80) at 1200 GPM at speed of 1500 RPM, what is the required impeller diameter in inches for the larger pump?arrow_forward
- A pump has a displacement volume of 6 in^3. It delivers 24 gpm at 1000 rpm and 1000 psi. If the prime mover input torque is 1100 in • lb, what is the theoretical torque required to operate the pump in in-lbs?Answer: 955 ± 1.arrow_forwardProblem 1 Water needs to be transferred from one reservoir to another at a rate of 600 gpm. A schematic of the pipe system is shown. The static lift is 20 ft. All elbows have the same K₁ value. The suction pipe (upstream of the pump) is a total of 50 ft long with a diameter of 8 inches and the discharge pipe is a total of 450 ft long with a diameter of 6 inches. Use CH = 130. The centerline of the pump inlet is 7.2 ft above the lower reservoir water surface. The reservoirs are located near sea level. Water temperature is 50°F. HKL valve Pump = 5.0 KL₂ ent = 0.8 KL elbow = 1.5 = 1.0 V (a) Determine the equation for the system curve. Simplify it as much as possible so it is in terms of only hp and Q. (b) Print out the next page. Draw the system curve on BOTH pump curves and determine which pump should be purchased (which graph and which impeller size). Submit your annotated printout with your assignment. Also submit supporting calculations. The system curves should be drawn using at…arrow_forwardProblem 13 A pump supplies oil at 25 gpm to a 11 in diameter double acting hydraulic cylinder. If the load is 1800 lb 4 (extending and retracting) and the rod diameter 3 in, find the 4 a. Hydraulic pressure during the extending stroke b. Piston velocity during the extending stroke c. Cylinder horsepower during the extending stroke d. Hydraulic pressure during the retracting stroke e. Piston velocity during the retracting stroke f. Cylinder horsepower during the retracting strokearrow_forward
- A water-cooling system for a hydro generator uses a drum to delivercooling fluid (figure Q1 Below). To stop the system a single shoe brake is used. Thewidth of shoe contact with the drum is 40 mm. The friction material provides acoefficient of friction of 0.3, and delivers an average pressure of 600 kPa, based onthe projected area of contact. Use the short-shoe approximate relationships. The initialdrum speed is 1200 rpm. (a) What value of force F can be applied without exceeding the allowablecontact pressure?arrow_forwardA centrifugal pump equipped with a variable frequency (speed) drive running at 3500 rpm is discharging 240GPM corresponding to a head of 287ft. The horsepower is 35.5. if the pump's speed is reduced to 2900 rpm, what will be the revised power required? Select the correct response: 29.32 hp 20.19 hp O 24.37 hp 29.41 hp 34.23 hp 30.37 hp lenovoarrow_forwardA small model of a water pump has the ff. performance characteristics: D1 = 9in; N1 = 1760 RPM; Q1 = 562.5 GPM; BP1 = 15 hp If a larger model geometrically similar to the small pump is to be used to deliver kerosene (S.G. = 0.80) at 1200 GPM at speed of 1500 RPM, what is the required impeller diameter in inches for the larger pump?Continuing the previous question, what is the required brake horsepower for the larger model?arrow_forward
- A manufacturer tested one of its pump models at 2133.5 rpm and derived the characteristics as shown in the figure on the left. Being satisfied with the model, the manufacturer decided to make a prototype that is 4 times larger than the model for one of its clients. The prototype pump is going to be operated at a shaft speed of 100 rpm to deliver 6000 GPM of water. What will most approximately be the pump efficiency of the prototype when it is on duty? Head, m; power, kW oooo 250 200 150 100 O 62% O 22% O 42% 50 O 82% 0 Efficiency 0.05 Head (AH), m N=2133.5 rpm n = 35.6 rps D = 37.1 cm 0.10 0.15 Discharge, m³/s Power input, kW 0.20 0.25 100 80 60 40 20 Efficiency, percent 5 4 CH 3 2 H 1 0 0 Efficiency, n 0.04 C 0.08 Co CH 0.12 1.00 0.75 0.50 0.25 0 0.16 Cp and efficiencyarrow_forwardPump has a displacement of 98400 mm. It delivers 91.2 Lpm of oil at 1000 rpm and efficiency is 81.7 %. If the prime mover has input torque is 12430 N-cm, find the value of pressure. Select one: O a. 6.99x10° N/m O b. 699.2x10° N/m 2 O C. 69.9x10° N/m 2 O d. 6.99x10° N/marrow_forwardNo. of plunger = 6, Plunger Diameter = 0.04 m, Stroke Length = 0.048 m and Rpm of Crank Shaft = 72.5 rpm. Find the required power to operate the pump at 60 bar pressure.arrow_forward
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