A linear actuator having a in single-thread Acme screw is used to raise a load of 1600 lb. A plain thrust collar having a 0.8 in mean diameter is used. Coefficients of running (kinetic) friction are estimated as μ= 0.13 and c = 0.1. a.) Determine the screw pitch, lead, thread depth, mean (pitch) diameter, and lead angle. b.) Estimate the torque needed to raise the load. c.) Estimate the "overall" efficiency of the linear actuator when raising the load. 0.125 in, h 0.0625 in, dm 0.5625 in, λ = 4.046° Ans. a.) P = 0.125 in, L b.) TLR = 157.1 in lb = 13.09 ft lb c.) 17 = 20.26%
A linear actuator having a in single-thread Acme screw is used to raise a load of 1600 lb. A plain thrust collar having a 0.8 in mean diameter is used. Coefficients of running (kinetic) friction are estimated as μ= 0.13 and c = 0.1. a.) Determine the screw pitch, lead, thread depth, mean (pitch) diameter, and lead angle. b.) Estimate the torque needed to raise the load. c.) Estimate the "overall" efficiency of the linear actuator when raising the load. 0.125 in, h 0.0625 in, dm 0.5625 in, λ = 4.046° Ans. a.) P = 0.125 in, L b.) TLR = 157.1 in lb = 13.09 ft lb c.) 17 = 20.26%
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Transcribed Image Text:A linear actuator having a in single-thread Acme screw is used to raise a load of 1600 lb. A plain
thrust collar having a 0.8 in mean diameter is used. Coefficients of running (kinetic) friction are
estimated as μ = 0.13 and c = 0.1.
a.) Determine the screw pitch, lead, thread depth, mean (pitch) diameter, and lead angle.
b.) Estimate the torque needed to raise the load.
c.) Estimate the "overall" efficiency of the linear actuator when raising the load.
Ans. a.) P = 0.125 in, L = 0.125 in, h=0.0625 in, dm 0.5625 in, λ = 4.046°
b.) TLR = 157.1 in lb = 13.09 ft lb
c.) n = 20.26%
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