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UNIT 2 TOM (2).pptx
This document discusses gear trains, including: 1. An epicyclic gear train with two gears (36 and 45 teeth) on an arm rotating at 150 rpm anticlockwise. This determines the speed of the second gear under two conditions. 2. A reverted epicyclic gear train with three gears (75, 30, and 90 teeth) on an arm rotating clockwise at 100 rpm. This determines the speed and direction of the third gear. 3. An internal gear train with two internal gears (80 and 82 teeth) and a compound gear (28 teeth) rotating freely on a shaft. This determines the speed of one shaft when the other rotates at 800 rpm.
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UNIT 2 TOM (2).pptx
- 1. UNIT 2 GEARS ANDGEAR TRAIN
- 2.
- 14. 4.In an epicyclicgear train, an arm carries two gears A and B having 36 and 45 teeth respectively. If the arm rotates at 150 r.p.m. in the anticlockwise direction about the centre of the gear A which is fixed, determine the speed of gear B. If the gear A instead of being fixed, makes 300 r.p.m. in the clockwise direction, what will be the speed of gear B ?
- 17. 5.In a revertedepicyclic gear train, the arm A carries two gears B and C and a compound gear D - E. The gear B meshes with gear E and the gear C meshes with gear D. The number of teeth on gears B, C and D are 75, 30 and 90 respectively. Find the speed and direction of gear C when gear B is fixed and the arm A makes 100 r.p.m. clockwise.
- 20. 6.n internal wheelB with 80 teeth is keyed to a shaft F. A fixed internal wheel C with 82 teeth is concentric with B. A compound wheel D-E gears with the two internal wheels; D has 28 teeth and gears with C while E gears with B. The compound wheels revolve freely on a pin which projects from a disc keyed to a shaft A co-axial with F. If the wheels have the same pitch and the shaft A makes 800 r.p.m., what is the speed of the shaft F ? Sketch the arrangement.