Q3 A portable conveyor is to be raised and lowered using the double power screw arrangement as shown in the figure. The two screws are supported by collars (A) and are connected by the roller chain (B) and rotated by the bevel gear (C), operated by the hand crank as shown. The movable frame (E) is raised and lowered by screws against a load (W = 8000N), using an Acme thread screw. Data: design stress for power screw is 50MPa, the lead angle is 4.36°, collar mean diameter is equal to screw outside diameter, coefficient of friction between any two contact parts is 0.15, the gear ratio of bevel gears equal to 2, applied load on the lever that rotates the bevel gear is 80N. Requirements: 1) Diameter of power screw, 2) Lever length (L), and 3) Draw in detail this system. A₁ B W A 14

Q3 A portable conveyor is to be raised and lowered using the double power screw arrangement as shown in the figure. The two screws are supported by collars (A) and are connected by the roller chain (B) and rotated by the bevel gear (C), operated by the hand crank as shown. The movable frame (E) is raised and lowered by screws against a load (W = 8000N), using an Acme thread screw. Data: design stress for power screw is 50MPa, the lead angle is 4.36°, collar mean diameter is equal to screw outside diameter, coefficient of friction between any two contact parts is 0.15, the gear ratio of bevel gears equal to 2, applied load on the lever that rotates the bevel gear is 80N. Requirements: 1) Diameter of power screw, 2) Lever length (L), and 3) Draw in detail this system. A₁ B W A 14

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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