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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 2024-12-22 02:22:57 +0000