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10. A reverted epicyclic gear train for a hoist block is shown in Fig. 13.39. The arm E is keyed to the same shaft as the load drum and the wheel A is keyed to a second shaft which car- ries a chain wheel, the chain being operated by hand. The two shafts have common axis but can rotate independently. The wheels B and C are compound and rotate together on a pin carried at the end of arm E. The wheel D has internal teeth and is fixed to the outer casing of the block so that it does not rotate. The wheels A and B have 16 and 36 teeth respectively with a module of 3 mm. The wheels C and D have a module of 4 mm. Find: 1. the number of teeth on wheels C and D when the speed of A is ten times the speed of arm E, both rotating in the same sense, and 2. the speed of wheel D when the wheel A is fixed and the arm E rotates at 450 r.p.m. anticlockwise. [Ans. Tc-13: T- 52: 500 r.p.m. anticlockwise] E 0 Fig. 13.39 O

10. A reverted epicyclic gear train for a hoist block is shown in Fig. 13.39. The arm E is keyed to the same shaft as the load drum and the wheel A is keyed to a second shaft which car- ries a chain wheel, the chain being operated by hand. The two shafts have common axis but can rotate independently. The wheels B and C are compound and rotate together on a pin carried at the end of arm E. The wheel D has internal teeth and is fixed to the outer casing of the block so that it does not rotate. The wheels A and B have 16 and 36 teeth respectively with a module of 3 mm. The wheels C and D have a module of 4 mm. Find: 1. the number of teeth on wheels C and D when the speed of A is ten times the speed of arm E, both rotating in the same sense, and 2. the speed of wheel D when the wheel A is fixed and the arm E rotates at 450 r.p.m. anticlockwise. [Ans. Tc-13: T- 52: 500 r.p.m. anticlockwise] E 0 Fig. 13.39 O

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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10. A reverted epicyclic gear train for a hoist block is shown in Fig. 13.39. The arm Els keyed to the same shaft as the load drum and the wheel A is keyed to a second shaft which car- ries a chain wheel, the chain being operated by hand. The two shafts have common axis but can rotate independently. The wheels B and Care compound and rotate together on a pin carried at the end of arm E. The wheel D has internal teeth and is fixed to the outer casing of the block so that it does not rotate. The wheels A and B have 16 and 36 teeth respectively with a module of 3 mm. The wheels C and D have a module of 4 mm. Find: 1. the number of teeth on wheels C and D when the speed of A is ten times the speed of arm E, both rotating in the same sense, and 2. the speed of wheel D when the wheel A is fixed and the arm E rotates at 450 r.p.m. anticlockwise. [Ans. T = 13: T= 52; 500 r.p.m. anticlockwise] E Co Fig. 13.39 C 00
Transcribed Image Text:10. A reverted epicyclic gear train for a hoist block is shown in Fig. 13.39. The arm Els keyed to the same shaft as the load drum and the wheel A is keyed to a second shaft which car- ries a chain wheel, the chain being operated by hand. The two shafts have common axis but can rotate independently. The wheels B and Care compound and rotate together on a pin carried at the end of arm E. The wheel D has internal teeth and is fixed to the outer casing of the block so that it does not rotate. The wheels A and B have 16 and 36 teeth respectively with a module of 3 mm. The wheels C and D have a module of 4 mm. Find: 1. the number of teeth on wheels C and D when the speed of A is ten times the speed of arm E, both rotating in the same sense, and 2. the speed of wheel D when the wheel A is fixed and the arm E rotates at 450 r.p.m. anticlockwise. [Ans. T = 13: T= 52; 500 r.p.m. anticlockwise] E Co Fig. 13.39 C 00
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