Mavzu: Tekis mexanizmlar uchun tezlanishlarm rejasini qurish
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Mavzu: Tekis mexanizmlar uchun tezlanishlarm rejasini qurish. Krivoship polzunli mexanizm uchun tezlanishlar rejasini qurish “OA” krivoship “O” nuqta atrofida bir tekis aylanma harakat qilmoqda. A= nA + τA aτA = 0 anA= ω2OA OA LOA=0,065m ω= 157 LAB = 0,2 m Tezlanishlar masshtabini aniqlaymiz an = ω2 lOA = 157² 0,065 = 1602 m/s2 µa = an 40 = 1602 50 = 32.04 (m/s2)/mm Shatun “AB” tekis-parallel harakat qilmoqda “A” nuqta qutb deb olindi B = A + AB B= nA+ nAB + τBA Bu tenglamada hamma vektorlarning yo’nalishi ma’lum: nB // x-x nA “A” nuqtadan “O” nuqtaga yo’nalgan nAB “BA” shatun bo’ylab “B” nuqtaga yo’nalgan τBA “BA” shatunga tik yo’nalgan, lekin qaysi tomonga noma’lum an = ω2 lOA = 1602 0,065 = 104.13 m/s2 µa = an 40 = 1602 50 = 32.04 (m/s2)/mm Pa= 50 mm “a” nuqtadan “AB” ga tik chiziq o’tqazamiz “P” nuqtadan “x-x” ga parallel chiziq o’tqazamiz Barcha nuqtalardagi tezlanishlarni topamiz φ=45 . aA1B1n =ω2A1B1 lAB=2.272 0,195=1.7 m/s2 aa' = aA1B1n µa =1.7 0,19 = 9mm aA1B1τ= µa = 32 0,19=6.08 m/s2 aB1n= Pb1 µa = 30 0,19=5,7 m/s2 aA1B1 =b1a µa = 32 0,19=6.08 m/s2 φ=90°.
aa' = aA2B2n µa =0 aA2B2τ =0 aB2n= Pb2 µa = 15 0,19=2,85 m/s2 aA2B2 =b2a µa = 42 0,19=7.98 m/s2 φ=135°. aA3B3n =ω2A3B3 lAB =6.362 0,330=13.34 m/s2 aa' = aA3B3n µa =13.34 0,19= 70.21 mm aA2B2τ = µa = 29 0,19=5.51 m/s2 aB3n = Pb3 µa = 30 0,19=5.7m/s2 aA3B3 = b3a µa = 29 0,19=5,51 m/s2 φ=180°. aA4B4n =ω2A4B4 lAB =22 0,330=1.32 m/s2 aa' = aA2B2n µa =1.32 0,19=6.94mm aA4B4τ = µa =27 0,19=5.13 m/s2 aB4n = Pb4 µa = 0 aA4B4 = b4a µa=40 0,19=7.6 m/s2 φ=225°. aA5B5n =ω2A5B5 lAB =6.36 2 0,330=13.34 m/s2 aa' = aA5B5n µa = 0,4 0,19=2.10 m/s2 aA5B5τ = µa = 27 0,19=5.13 m/s2 aB5n = Pb5 µa = 27 0,19=5.13 m/s2 aA5B5 = b5a µa = 28 0,19=5.32 m/s2 φ=270°. aA6B6n =ω2A6B6 lAB = 0 aa' = aA6B6n µa =0 aA5B5τ = µa =0 aB6n = Pb6 µa = 15 0,19=2.85 m/s2 aA6B6 = b6a µa = 44 0,19 =8.36 m/s2 φ=315°. aA7B7n =ω2A7B7 lAB =2.272 0,330=1.7 m/s2 aa' = aA7B7n µa =1.7 0,19= 9 mm aA7B7τ = µa = 31 0,19=5.89 m/s2 aB7n = Pb7 µa = 30 0,19=5.7 m/s2 aA7B7 = b7a µa = 27 0,19=5.13 m/s2 φ=360°. aA8B8n =ω2A8B8 lAB =22 0,330=1.32 m/s2 aa' = aA8B8n µa =1.32 0,19=6.94 mm aA7B7τ = µa =53 0,19=10.07m/s2 aB8n = Pb8 µa = 0 aA8B8 = b8a µa = 40 0,19=7.6 m/s2 Yüklə 13,66 Kb. Dostları ilə paylaş:
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