In a broaching machine shown, shaft A carries a pulley 60.96 cm in diameter which is driven by a leather flat belt from 12-inch pulley on the 30 Hp-squirrel-cage, compensator-motor shaft overhead, the latter turning 1200 rpm. Gears 2 & 4 have 12 teeth each, and 3 & 5 have 60 teeth each. Gear 5 is fast to 6, which has 10 teeth and a module of 8.465 mm/tooth and which engages with rack 7 to which is attached the broach. Assuming that there is no slipping between the pulleys and the belt. Determine: a) the speed with which the broach is drawn through the work, in m/s. b) Specify a double ply, medium weight, cemented joint leather flat belt, considering a mildly jerking loads and a center distance of 60 inches. c) Determine the belt tensions of the belt and the F, maximum stress in the straight part of ALBA belt if¹ = 3 F₁ F₂ Gear 6 Gear 5 Rack CEO CEC A Gear 2 030-0--30 Gear 4 Gear 3

In a broaching machine shown, shaft A carries a pulley 60.96 cm in diameter which is driven by a leather flat belt from 12-inch pulley on the 30 Hp-squirrel-cage, compensator-motor shaft overhead, the latter turning 1200 rpm. Gears 2 & 4 have 12 teeth each, and 3 & 5 have 60 teeth each. Gear 5 is fast to 6, which has 10 teeth and a module of 8.465 mm/tooth and which engages with rack 7 to which is attached the broach. Assuming that there is no slipping between the pulleys and the belt. Determine: a) the speed with which the broach is drawn through the work, in m/s. b) Specify a double ply, medium weight, cemented joint leather flat belt, considering a mildly jerking loads and a center distance of 60 inches. c) Determine the belt tensions of the belt and the F, maximum stress in the straight part of ALBA belt if¹ = 3 F₁ F₂ Gear 6 Gear 5 Rack CEO CEC A Gear 2 030-0--30 Gear 4 Gear 3

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

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A simple gear train of 30 and 40 teeth for pinion and gear wheel respectively is used to drive an electric wheelchair at a velocity that is double the maximum velocity of slip. The pinion has an equal addendum as the gear wheel , a module of 3 mm and a pressure angle of 14.5 ° . The wheelchair has a maximum velocity of 5 m/s when is pinion rotates at 800 r.p.m . Calculate: 1.1) The magnitude of the velocity of slip of gear mesh. 1.2) The angular speed of the gear wheel in rad/s. 1.3) The maximum length of a path of the approach in mm. 1.4) The length of a recess in mm. 1.5) The addendum of the gear in mm. 1.6) The constant ratio.
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You have been asked by your engineering company to design a complete gear and shaft system shaft that is made of steel. The solid shaft is linked with gear A, B, C and D with gear A, B and C produces torque of 15 kNm (clockwise), 30 kNm (clockwise) and 75kNm (anticlockwise). respectively each. If AB = 0.70m, BC=0.80 m and CD=0.90 m with the shafts consist of solid circular shafts with a diameter of 150 mm having the shear modulus of G= 80 GPa. a) Design and detemine the portion of the shaft which has the largest magnitude of shear stress, (7)max. Include free body diagram (FBD) in your analysis.
3. The center distance of two pair of meshing spur gears 4 = a, =160mm m, = m, z, = 20 3 = 30, 2, = 50 . Calculate the module of four gears and the tooth number of gear 1.
(3) A mechanism consists of two flexible shafts: shaft1 and shaft 2 which are connected by gear I and gear 2. Each shaft is fixed on one end at a fixed support. Gear 1 J.N Fored Support Shaft 1 Fied Support Shaft 2 Gear 2 length of shaft 1: 1 = 0.3 m; length of shaft 2: 1= 0.2 m; diameter of shaft 1 and shaft 2: d=0.01m; gear number N-48; gear number Ny= 24; density of shaft I and shaft 2 material p = 6000 kg/m³. the two gears have moment of inertia J 4 10 kg m², and J;= 1-10* kg m² Determine the equivalent moment of inertia, Jeg, of the system at the coordinate Oj shown in the figure.
A simple gear train of 30 and 50 teeth for pinion and gear wheel respectively, is used to drive an electric wheelchair at a velocity that is double the maximum velocity of slip. The pinion has an equal addendum as the gear wheel, a module of 3 mm, and a pressure angle of 14.5o. The wheelchair has a maximum velocity of 5 m/s when its pinion rotates at 800 r.p.m. Calculate: a) The magnitude of the velocity of slip of gears in mesh. b)The maximum length of a path of the approach in mm c ) The length of a path of a recess in mm d) The addendum of the gears in mm e) The contact ratio.
Two cqual involute gear wheels of 40 teeth each, 3 mm module and 20° pressures angleare in mesh. Determine the minimum addendum if 2 pairs of teeth are always in mesh.The gear wheels rotate at 750 r.p.m. and transmit 4.6 kW. Find the normal force at eachpair assuming equal direction of load between the pairs. Neglect friction.
A pair of gears, having 43 and 22 teeth respectively, are rotating in mesh, the speed of the smaller being 1600 r.p.m. Determine the velocity of sliding between the gear teeth faces at the point of engagement, at the pitch point, and at the point of disengagement if the smaller gear is the driver. Assume that the gear teeth are 20° involute form, addendum length is 5 mm and the module is 3 mm. Also find the angle through which the pinion turns while any pairs of teeth are in contact.