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.14-33(YN )P = 0.977, (YN )G = 0.996(St)P = (St)G = 82.3(250) + 12 150 = 32 725 psi32 725(0.977)(Ãall)P = = 37 615 psi1(0.85)37 615(1.5)(0.423)tW1 = = 1558 lbf1(1.404)(1.043)(8.66)(1.208)(1)1558(925)H1 = = 43.7hp33 000budynas_SM_ch14.qxd 12/05/2006 17:39 Page 376FIRST PAGES376 Solutions Manual " Instructor s Solution Manual to Accompany Mechanical Engineering Design32 725(0.996)(Ãall)G = = 38 346 psi1(0.85)38 346(1.5)(0.5346)tW2 = = 2007 lbf1(1.404)(1.043)(8.66)(1.208)(1)2007(925)H2 = = 56.3hp33 000(ZN )P = 0.948, (ZN )G = 0.9737Table 14-6: (Sc)10 = 150 000 psi0.990.948(1)(Ãc,allow)P = 150 000 = 167 294 psi1(0.85)2167 294 1.963(1.5)(0.195)tW3 = = 2074 lbf2300 1(1.404)(1.043)2074(925)H3 = = 58.1hp33 0000.973(Ãc,allow)G = (167 294) = 171 706 psi0.9482171 706 1.963(1.5)(0.195)tW4 = = 2167 lbf2300 1(1.404)(1.052)2167(925)H4 = = 60.7hp33 000Hrated = min(43.7, 56.3, 58.1, 60.7) = 43.7hp Ans.Pinion bending controlling14-34(YN )P = 1.6831(108)-0.0323 = 0.928(YN )G = 1.6831(108/3.059)-0.0323 = 0.962Table 14-3: St = 55 000 psi55 000(0.928)(Ãall)P = = 60 047 psi1(0.85)60 047(1.5)(0.423)tW1 = = 2487 lbf1(1.404)(1.043)(8.66)(1.208)(1)2487(925)H1 = = 69.7hp33 0000.962(Ãall)G = (60 047) = 62 247 psi0.92862 247 0.5346tW2 = (2487) = 3258 lbf60 047 0.4233258H2 = (69.7) = 91.3hp2487budynas_SM_ch14.qxd 12/05/2006 17:39 Page 377FIRST PAGESChapter 14 377Table 14-6: Sc = 180 000 psi(ZN )P = 2.466(108)-0.056 = 0.8790(ZN )G = 2.466(108/3.059)-0.056 = 0.9358180 000(0.8790)(Ãc,all)P = = 186 141 psi1(0.85)2186 141 1.963(1.5)(0.195)tW3 = = 2568 lbf2300 1(1.404)(1.043)2568(925)H3 = = 72.0hp33 0000.9358(Ãc,all)G = (186 141) = 198 169 psi0.87902198 169 1.043tW4 = (2568) = 2886 lbf186 141 1.0522886(925)H4 = = 80.9hp33 000Hrated = min(69.7, 91.3, 72, 80.9) = 69.7hp Ans.Pinion bending controlling14-35 (YN )P = 0.928, (YN )G = 0.962 (See Prob.14-34)Table 14-3: St = 65 000 psi65 000(0.928)(Ãall)P = = 70 965 psi1(0.85)70 965(1.5)(0.423)tW1 = = 2939 lbf1(1.404)(1.043)(8.66)(1.208)2939(925)H1 = = 82.4hp33 00065 000(0.962)(Ãall)G = = 73 565 psi1(0.85)73 565 0.5346tW2 = (2939) = 3850 lbf70 965 0.4233850H2 = (82.4) = 108 hp2939budynas_SM_ch14.qxd 12/05/2006 17:39 Page 378FIRST PAGES378 Solutions Manual " Instructor s Solution Manual to Accompany Mechanical Engineering DesignTable 14-6: Sc = 225 000 psi(ZN )P = 0.8790, (ZN )G = 0.9358225 000(0.879)(Ãc,all)P = = 232 676 psi1(0.85)2232 676 1.963(1.5)(0.195)tW3 = = 4013 lbf2300 1(1.404)(1.043)4013(925)H3 = = 112.5hp33 0000.9358(Ãc,all)G = (232 676) = 247 711 psi0.87902247 711 1.043tW4 = (4013) = 4509 lbf232 676 1.0524509(925)H4 = = 126 hp33 000Hrated = min(82.4, 108, 112.5, 126) = 82.4hp Ans.The bending of the pinion is the controlling factor [ Pobierz caÅ‚ość w formacie PDF ]