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-{
- "metadata": {
- "name": "",
- "signature": "sha256:b67efe642bf9e9729105e3923ad7beb49ea7d0158d7e2b0caa861c9f34280019"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Ch:29 Gearbox"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "exa 29-1 - Page 749"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "from __future__ import division\n",
- "from math import sqrt, pi\n",
- "Ts1=16#\n",
- "Ts2=18#\n",
- "Ts3=20#\n",
- "Ts4=25#\n",
- "Tr1=64#\n",
- "Tr2=63#\n",
- "Tr3=70#\n",
- "Tr4=50#\n",
- "#Let Nr1/Nr2=G1\n",
- "G1=1+(Ts1/Tr1)#\n",
- "#Let Nr1/Ni=G2\n",
- "G2=(Ts2/(Tr2*(1-(1/G1)+(Ts2/Tr2))))#\n",
- "#Let Ni/No=G3 (third gear)\n",
- "G3=(1+(Ts3/Tr3))/((Ts3/Tr3)+G2)#\n",
- "\n",
- "#Let Ni/Nr1=G4\n",
- "#The ratio calculations are done as above\n",
- "G4=1.2857/0.2857#\n",
- "#Let Ni/No =G5(second gear)\n",
- "G5=-20/70#\n",
- "#Let Ni/No=G6(first gear)\n",
- "G6=1.2857/0.2857#\n",
- "#Let Ni/No=G7(reverse gear)\n",
- "G7=-1.7143/0.2857#\n",
- "print \"ratio for third gear is %0.3f \"%(G3)#\n",
- "print \"\\nratio for second gear is %0.4f \"%(G5)#\n",
- "print \"\\nratio for first gear is %0.1f \"%(G6)#\n",
- "print \"\\nratio for reverse gear is %0.3f \"%(G7)#\n",
- " "
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "ratio for third gear is 1.471 \n",
- "\n",
- "ratio for second gear is -0.2857 \n",
- "\n",
- "ratio for first gear is 4.5 \n",
- "\n",
- "ratio for reverse gear is -6.000 \n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "exa 29-2 - Page 751"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Let reverse speed gear be RSG\n",
- "RSG=5.5#\n",
- "#Let T5/T6 = Z1\n",
- "T1=2#\n",
- "#Let T3/T7 = Z2\n",
- "Z2=2.75#\n",
- "T7=18#\n",
- "T3=Z2*T7#\n",
- "T3=50#\n",
- "#Let T3/T1 =Z3\n",
- "Z3=2.5#\n",
- "T1=T3/Z3#\n",
- "#Let T4/T2 = Z4\n",
- "Z4=2.25/2#\n",
- "T2=(T1+T3)/(Z4+1)#\n",
- "T4=T1+T3-T2#\n",
- "#Let T5/T6=Z5\n",
- "Z5=2#\n",
- "T6=(T1+T3)/3#\n",
- "T5=(T1+T3)-T6#\n",
- "T7=18#\n",
- "#let first gear ratio is G1\n",
- "G1=50*47/(20*23)#\n",
- "\n",
- "#Let 2nd gear ratio is G2\n",
- "G2=37*47/(33*23)#\n",
- "#Let 3rd gear ratio is G3\n",
- "G3=1#\n",
- "#Let reverse gear ratio is R\n",
- "R=50*47/(18*23)#\n",
- "print \"T1 is %0.0f \"%(T1)#\n",
- "print \"\\nT2 is %0.0f \"%(T2)#\n",
- "print \"\\nT3 is %0.0f \"%(T3)#\n",
- "print \"\\nT4 is %0.0f \"%(T4)#\n",
- "print \"\\nT5 is %0.0f \"%(T5)#\n",
- "print \"\\nT6 is %0.0f \"%(T6)#\n",
- "print \"\\nT7 is %0.0f \"%(T7)#\n",
- "print \"\\nG1 is %0.3f \"%(G1)#\n",
- "print \"\\nG2 is %0.3f \"%(G2)#\n",
- "print \"\\nG3 is %0.1f \"%(G3)#\n",
- "print \"\\nR is %0.3f \"%(R)#\n",
- " "
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "T1 is 20 \n",
- "\n",
- "T2 is 33 \n",
- "\n",
- "T3 is 50 \n",
- "\n",
- "T4 is 37 \n",
- "\n",
- "T5 is 47 \n",
- "\n",
- "T6 is 23 \n",
- "\n",
- "T7 is 18 \n",
- "\n",
- "G1 is 5.109 \n",
- "\n",
- "G2 is 2.291 \n",
- "\n",
- "G3 is 1.0 \n",
- "\n",
- "R is 5.676 \n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "exa 29-3 - Page 752"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Let the constant gear ratio be G\n",
- "G=2#\n",
- "x=5.5**(1/3)#\n",
- "G1=1#\n",
- "G2=x#\n",
- "G3=x*x#\n",
- "G4=x**3#\n",
- "T7=18#\n",
- "T8=T7*(x**3)/2#\n",
- "T8=51#\n",
- "T5=69/2.558#\n",
- "T6=69-27#\n",
- "T4=69/1.8825#\n",
- "T3=69-T4#\n",
- "T1=23#\n",
- "T2=46#\n",
- "T9=18#\n",
- "G1=T2*T8/(T1*T7)#\n",
- "G2=T2*T6/(T1*T5)#\n",
- "G3=1#\n",
- "G4=-T2*T8/(T1*T9)#\n",
- "print \"T1 is %0.0f \"%(T1)#\n",
- "print \"\\nT2 is %0.0f \"%(T2)#\n",
- "print \"\\nT3 is %0.0f \"%(T3)#\n",
- "print \"\\nT4 is %0.0f \"%(T4)#\n",
- "print \"\\nT5 is %0.0f \"%(T5)#\n",
- "print \"\\nT6 is %0.0f \"%(T6)#\n",
- "print \"\\nT7 is %0.0f \"%(T7)#\n",
- "print \"\\nT8 is %0.0f \"%(T8)#\n",
- "print \"\\nT9 is %0.0f \"%(T9)#\n",
- "print \"\\nG1 is %0.3f \"%(G1)#\n",
- "print \"\\nG2 is %0.3f \"%(G2)#\n",
- "print \"\\nG3 is %0.3f \"%(G3)#\n",
- "print \"\\nG4 is %0.3f \"%(G4)#"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "T1 is 23 \n",
- "\n",
- "T2 is 46 \n",
- "\n",
- "T3 is 32 \n",
- "\n",
- "T4 is 37 \n",
- "\n",
- "T5 is 27 \n",
- "\n",
- "T6 is 42 \n",
- "\n",
- "T7 is 18 \n",
- "\n",
- "T8 is 51 \n",
- "\n",
- "T9 is 18 \n",
- "\n",
- "G1 is 5.667 \n",
- "\n",
- "G2 is 3.114 \n",
- "\n",
- "G3 is 1.000 \n",
- "\n",
- "G4 is -5.667 \n"
- ]
- }
- ],
- "prompt_number": 3
- }
- ],
- "metadata": {}
- }
- ]
-} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-20 06:56:38 +0000