You have to build a box lifter, this will be made with a square threaded power screw. The power screw is 3 inches in diameter and 2 threads per inch. To improve the speed of raising and lowering the boxes, it must be with triple thread. The coefficient of friction of the screw and collar is 0.25, the diameter of the collar is 4 inches. Calculate: 1. The depth of the thread, the width of the face, the average diameter, the root diameter, the pitch and its feed. 2. The torque to increase the load and the efficiency of the screw. 3. The speed of the motor (in rpm), if it is directly coupled to the screw and it is desired that the boxes rise at a speed of 30 inches/min.
You have to build a box lifter, this will be made with a square threaded power screw. The power screw is 3 inches in diameter and 2 threads per inch. To improve the speed of raising and lowering the boxes, it must be with triple thread. The coefficient of friction of the screw and collar is 0.25, the diameter of the collar is 4 inches. Calculate: 1. The depth of the thread, the width of the face, the average diameter, the root diameter, the pitch and its feed. 2. The torque to increase the load and the efficiency of the screw. 3. The speed of the motor (in rpm), if it is directly coupled to the screw and it is desired that the boxes rise at a speed of 30 inches/min.
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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You have to build a box lifter, this will be made with a square threaded power screw. The power screw is 3 inches in diameter and 2 threads per inch. To improve the speed of raising and lowering the boxes, it must be with triple thread. The coefficient of friction of the screw and collar is 0.25, the diameter of the collar is 4 inches.
Calculate:
1. The depth of the thread, the width of the face, the average diameter, the root diameter, the pitch and its feed.
2. The torque to increase the load and the efficiency of the screw.
3. The speed of the motor (in rpm), if it is directly coupled to the screw and it is desired that the boxes rise at a speed of 30 inches/min.
Transcribed Image Text:colla
2500 lb
engine
2500 lb
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