Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Q2 A sluice gate weighing (1.8tonnes) is raised and lowered using a square thread
screw. The frictional resistance induced by water pressure against the gate when it
lowers its position is 400Kg. The outside diameter of the screw is (6cm) and the pitch
is (1cm). The outside and inside diameters of the washer are (15cm and 5cm)
respectively. The coefficient of friction between the screw and nut is (0.1) and
between the washer and seat is (0.12). Requirements: 1) Calculate the maximum
force to be exerted at the end of the lever for raising and lowering the gate. 2)
Efficiency of arrangement. 3) Number of thread and height of the nut, an allowable
bearing pressure is 70Kg/cm².
HA
Thrust
washer
Nut
Screw
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Transcribed Image Text:Q2 A sluice gate weighing (1.8tonnes) is raised and lowered using a square thread screw. The frictional resistance induced by water pressure against the gate when it lowers its position is 400Kg. The outside diameter of the screw is (6cm) and the pitch is (1cm). The outside and inside diameters of the washer are (15cm and 5cm) respectively. The coefficient of friction between the screw and nut is (0.1) and between the washer and seat is (0.12). Requirements: 1) Calculate the maximum force to be exerted at the end of the lever for raising and lowering the gate. 2) Efficiency of arrangement. 3) Number of thread and height of the nut, an allowable bearing pressure is 70Kg/cm². HA Thrust washer Nut Screw
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