Figure 1 shows a blower is driven by a 3-phase Brook Crompton motor via a Compound Gear Train having an overall efficiency of 92% and Velocity Ratio of larger gears 2 and 4 are equal size. All four gears have module of 6 mm and pressure 14.45:1. Gears 1 has 30 teeth and gear 3 has 0.8x number of teeth of gear 1, the two angle of 20°. The blower requires a power of 4 kW at a speed of 95 rpm and it operates for 15 hours per day under steady load conditions. The shaft AB has a diameter of 33 mm. Figure 1 Blower Required Power = 4 KW Required Speed=95 rpm ● . ●. Bearing B ● Gear 3 Bearing D Bearing F Gear 1 + Gear 4 Motor frame size Motor power Motor speed Motor shaft diameter Length of the motor Noise level Full load torque Bearing A Coupling Bearing C Gear 2 Bearing E Compound Gear Train Efficiency = 92% V.R.-14.45:1 Gear Shaft AB Ø33 mm D 3-phase Motor 0.3 m G 430 N 0.3 m 1680 N Motor selection (i) Calculate the rotational speed required by the motor; (ii) Calculate the power required by the motor; (iii) Select a suitable 3-phase Brook Crompton motor for the system stating the following: Figure 2 F 0.3 m C

Figure 1 shows a blower is driven by a 3-phase Brook Crompton motor via a Compound Gear Train having an overall efficiency of 92% and Velocity Ratio of larger gears 2 and 4 are equal size. All four gears have module of 6 mm and pressure 14.45:1. Gears 1 has 30 teeth and gear 3 has 0.8x number of teeth of gear 1, the two angle of 20°. The blower requires a power of 4 kW at a speed of 95 rpm and it operates for 15 hours per day under steady load conditions. The shaft AB has a diameter of 33 mm. Figure 1 Blower Required Power = 4 KW Required Speed=95 rpm ● . ●. Bearing B ● Gear 3 Bearing D Bearing F Gear 1 + Gear 4 Motor frame size Motor power Motor speed Motor shaft diameter Length of the motor Noise level Full load torque Bearing A Coupling Bearing C Gear 2 Bearing E Compound Gear Train Efficiency = 92% V.R.-14.45:1 Gear Shaft AB Ø33 mm D 3-phase Motor 0.3 m G 430 N 0.3 m 1680 N Motor selection (i) Calculate the rotational speed required by the motor; (ii) Calculate the power required by the motor; (iii) Select a suitable 3-phase Brook Crompton motor for the system stating the following: Figure 2 F 0.3 m C

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

For a pair of standard gears, the module is m=2.5mm，pressure angle is α=20 0. ha*=1. c*=0.25. The teeth number on gear 1 is z1=22. The standard center distance is a=68.75mm. If the actual center distance is a’=69.75mm, find the working pressure angle α’=( )°
(b)A pair of straight bevel gears has a velocity ratio of 2:1. The pitch circle diameter of the pinion is 80 mm at the large end of the tooth.A5KW power is supplied to the pinion which rotates at 800 rp.m. The face width is 40 mm and the pressure angle is 20. Calculate the tangential ,radial and axial components of the resultant tooth force acting on the pinion
A pair of gray iron and steel helical gears, having a helix angle of 15° with 20° full-depth teeth are to transmit 10 hp at 1500 rpm of a 4-in pinion having a total number of 28teeth. The velocity ratio desired is about mw = 4. Find the (a) normal circular pitch, (b) normal diametral pitch, (c) axial pitch, and (d) dynamic loa
Two spur gears transmit 36kW with a velocity ratio of 2:1. The speed of the smaller driving gear is 100rpm. The centre distance between the shafts is to be as near as possible to 920mm. If m=10 and all-21MPa, determine a) Diameter of the shafts b)PCD for each wheel c)Number of teeth on each wheel d) Actual centre distance [ e) Width of the teeth
Provide very clear and complete solution and diagam. SITUATIONAL PROBLEM: Two shafts are connected by spur gears. The pitch radii of the gears A and B are 200 mm and 860 mm respectively. If shaft A makes 350rpm and is subjected to twisting moment of 250 N-m. Pressure angle is 14.5 degree. What is: a.) Rpm of gear B b.) Torque in shaft B (in Newton meter). c.) Separation load of two gears (in newtons). d.) Total load on gears (in newtons).
Please answer part 2, A 20° full depth involute spur pinion of 4 mm module and 21 teeth is to transmit 15 kW at 960 rpm. Its face width is 25 mm. 1.The tangential force transmitted (in N) is (a) 3552 (b) 2611 (c) 1776 (d) 1305 2. Given that the tooth geometry factor is 0.32 and the combined effect of dynamic load and allied factors intensifying the stress is 1.5 the minimum allowable stress for the gear material in MPa is, (a) 242.0 (c) 121.0 (b) 166.5 (d) 74.0
For a pair of spur gears, one design decision is to specify the pressure angles. Please select the common values of pressure angle per textbook. 300 200 250
Q.8 A pair of helical gears in which teeth on pinion are 20 and on gear are 30, the normal module is 5 mm and normal pressure angle is 20°. The helix angle is 30°. The pinion is provided 5 kW at 720 rpm. Determine various forces on the teeth.
A pair of 20 pressure angle bevel gears of N , = 30 and N2 = 60 has a module m of 8.5 mm at the outside diameter . Determine the power capacity of the pair , using the Lewis and Buckingham equations . The gears have face width of 70 mm , K , = 1.5 , and the pinion rotates at 720 rpm . The gears are made of steel SAE 1040 and hardened to about 200 Bhn Hi sir this design machine
A pair of 20 degree full depth spur gears have module of 2.5 and to be mounted on shafts with center distance of 90mm and gear ratio of 3. Find : $ if there is an interference $length of action and contact ratio $ if centher ditance was increased by 3mm, find backlash produced
A pair of gears with 14.5° full-depth teeth are to transmit 5 hp at 1800 rpm of the pinion; mw= 2.5; Np = 20 teeth; carefully cut teeth; intermittent service; Kf= 1.45. A. Determine the diametral pitch, B. face width, C. and tooth numbers if the pinionis to be made of phosphor gear bronze (SAE 65, Table AT 3
What are the harmful effects of backlash error in gears?