Soalan No.3 rtion No.3) &PO12; Satu penggerak hidraul angkat-tegak tindakan tung
ID: 1718370 • Letter: S
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Soalan No.3 rtion No.3) &PO12; Satu penggerak hidraul angkat-tegak tindakan tungg direkabentuk unt dibekalkan ul angkat-tegak tindakan tunggal seperti dalam Rajah 3 u, untuk membawa beban W. 140001b Tekanan bendalir yang dalam s linder penggerak hidraul adalah 2000 psi. Silinder, omboh, dan batang penggerak hidraul diperbuat 24000 psi dan kekuatan ricih 18000 psi i dan kekbuat daripada bahan yang mempunyai kekuatan alah luaran maksimum yang dibenarkan b agi silinder adalah 4.0 inci Tentukan saiz silinder yang sesuai bagi bersamaaer yang sesuai bagi penggerak hidraul ini jika faktor keselamatan e y ac ng vertical-uift hydraulic actuator shown in Figure 3 is designed to carry matenial with yield strength of 24000 psi and shear strength of 18000 psi. The Qetemine the proper cylinder size for this hydraulic actuator if a factor safety of 2.0 amean dengan 2.0 digunakan dalam rekabentuk. (4 e ioa aotvator is 2000 Psi The cylinder, piston, fluid pressure in the cylinder of the hydraulic and rod of hydraulic actuator are made of 14000 1b. The provided alowable extenal diameter for the cylinder is 4.0 in. 10 n heh boengn der sze for this hydrauic actuator If factor safety or 2.0 is used in the design.) (30 Markah/30 Marks) T-900-F oad w Wrist pivot Vent Gaide bushing Rod 1020 steel cylinder Piston -4.0 in Minimum p 2000 psi Hydraulic fluid supply port Fixed support pivot Rajah 3 (Figure 3)Explanation / Answer
>> As, maximum shear stress = 18,000 psi
and, FOS = 2
>> So, allowablemaximum shear stress = 18000/2 = 9000 psi
>> Let internal dia = "d"
As, Force = Stress*Area
=> W = 9000**(D2 - d2)/4
As, W = 14000* lb
D= External Dia = 4 in
Ao, on Solving this.
=> d = 3.59 in = Internal Dia .......ANSWER....
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