ENGLISH FOR AUTOMOBILE ENGINEERING UNIT ROTARY SYSTEM Lecturer: Lang Van Thang HOCHIMINH UNIVERSITY OF INDUSTRY Presentation Read the text and complete HOCHIMINH UNIVERSITY OF INDUSTRY Practice Using Figure 3.2 to complete the text below: a) D has a greater number of teeth b) B has a greater diameter c) F has a faster d) speed E has a faster speed e) The speed of B than than than than F C D F is slower than the speed of f) C has a smaller number of A has a slower speed teeth C than A, so g) B has a greater number of teeth than A; the speed of B is therefore Slower than A HOCHIMINH UNIVERSITY OF INDUSTRY Practice Choose a, b, c, d or e to complete the sentences Use Figure 3.2 and Table 3.1 below: a) The ratio of the number of teeth is b the size ratio e b) The two gear system in Figure 3.2 are c c) A:C and D:F are d) The movement of A is e) The speed of B is d a the movement of B the speed of A f) The direction of movement of D is of movement F b the direction HOCHIMINH UNIVERSITY OF INDUSTRY Practice HOCHIMINH UNIVERSITY OF INDUSTRY Practice If the movement of the bottom pulley is anticlockwise, the movement of the Top pulley is also Anticlockwise If the movement of the top pulley is clockwise, the movement of the bottom pulley is also clockwise If the movement of the front sprocket is anticlockwise, the movement of the rear sprocket is also Anticlockwise If the movement of the small gear is anticlockwise , the movement of the large gear is clockwise If the movement of the large gear is clockwise, the movement of the small gear is anticlockwise HOCHIMINH UNIVERSITY OF INDUSTRY Practice Read the text following; then complete the second one Use Figures 2.5 and 2.6 HOCHIMINH UNIVERSITY OF INDUSTRY In pulley systems, the diameter of the pulleys is very important In pulley system in Figure 2.5, the diameter of the top pulley is 20 cm and the diameter of the bottom pulley is 10 cm If the speed of the top pulley is 100 revolutions per minute (100 rev/min), the speed of the bottom pulley is 200 rev/ HOCHIMINH UNIVERSITY OF INDUSTRY Practice Read the text following; then complete the second one Use Figures 2.5 and 2.6 HOCHIMINH UNIVERSITY OF INDUSTRY Bikes have a sprocket and chain system The number of teeth on the sprockets is very important On the sprocket has 32 bike in Figure 2.6, the front teeth and The rear sprocket has 16 teeth If the speed of the front sprocket is 60 rev/min, the speed of the rear sprocket is 120 rev/min Therefore: Speed of rear sprocket Speed of = front sprocket x teeth of front sprocket teeth of rear sprocket HOCHIMINH UNIVERSITY OF INDUSTRY Practice Speed of rear sprocket Speed of = front sprocket x Diameter of front sprocket Diameter of rear sprocket HOCHIMINH UNIVERSITY OF INDUSTRY HOCHIMINH UNIVERSITY OF INDUSTRY ... than A; the speed of B is therefore Slower than A HOCHIMINH UNIVERSITY OF INDUSTRY Practice Choose a, b, c, d or e to complete the sentences Use Figure 3. 2 and Table 3. 1 below: a) The ratio of the... Table 3. 1 below: a) The ratio of the number of teeth is b the size ratio e b) The two gear system in Figure 3. 2 are c c) A:C and D:F are d) The movement of A is e) The speed of B is d a the movement... Figures 2.5 and 2.6 HOCHIMINH UNIVERSITY OF INDUSTRY In pulley systems, the diameter of the pulleys is very important In pulley system in Figure 2.5, the diameter of the top pulley is 20 cm and