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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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

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
E
14.

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Step 1: Determine diameter of power screw and the length of the lever

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Step 2: Determine the diameter of power screw

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Step 3: Determine the length of the lever

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Step 4: Drawing of the given system

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