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diff --git a/Machine_Design_by_U_C_Jindal/26-HELICAL_GEARS.ipynb b/Machine_Design_by_U_C_Jindal/26-HELICAL_GEARS.ipynb new file mode 100644 index 0000000..bd4213f --- /dev/null +++ b/Machine_Design_by_U_C_Jindal/26-HELICAL_GEARS.ipynb @@ -0,0 +1,241 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 26: HELICAL GEARS" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 26.1: HG1.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"// sum 26-1\n", +"clc;\n", +"clear;\n", +"Zp=20;\n", +"Zg=50;\n", +"alphan=20*%pi/180;\n", +"phi=15*%pi/180;\n", +"mn=4;\n", +"m=mn/cos(phi);\n", +"alpha=180/%pi*atan(tan(alphan)/(cos(phi)));\n", +"dp=Zp*m;\n", +"dg=Zg*m;\n", +"ha=4;\n", +"hd=1.25*mn;\n", +"//Let addendum circle dia of pinion be Pa\n", +"Pa=dp+(2*mn);\n", +"//Let dedendum circle dia of pinion be Pd\n", +"Pd=dp-(2.5*mn);\n", +"//Let addendum circle dia of gear be Ga\n", +"Ga=dg+(2*mn);\n", +"//Let dedendum circle dia of gear be Gd\n", +"Gd=dg-(2.5*mn);\n", +"b=%pi*mn/sin(phi);\n", +"\n", +" // printing data in scilab o/p window\n", +" printf('m is %0.2f mm ',m);\n", +" printf('\n alpha is %0.3f deg ',alpha);\n", +" printf('\n Pa is %0.1f mm ',Pa);\n", +" printf('\n Pd is %0.1f mm ',Pd);\n", +" printf('\n Ga is %0.0f mm ',Ga);\n", +" printf('\n Gd is %0.0f mm ',Gd);\n", +" printf('\n b is %0.2f mm ',b);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 26.2: HG2.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"// sum 26-2\n", +"clc;\n", +"clear;\n", +"P=5000;\n", +"Zp=25;\n", +"Zg=50;\n", +"mn=4;\n", +"alphan=20*%pi/180;\n", +"phi=20*%pi/180;\n", +"N=1200;\n", +"m=mn/cos(phi);\n", +"dp=Zp*m;\n", +"dg=Zg*m;\n", +"v=2*%pi*N*dp/(60*2*1000);\n", +"Pt=P/v;\n", +"Pa=Pt*tan(phi);\n", +"Pr=Pt*tan(alphan)/cos(phi);\n", +"\n", +" // printing data in scilab o/p window\n", +" printf('Pt is %0.2f N ',Pt);\n", +" printf('\n Pa is %0.1f N ',Pa);\n", +" printf('\n Pr is %0.2f N ',Pr);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 26.3: HG3.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"// sum 26-3\n", +"clc;\n", +"clear;\n", +"Zp=24;\n", +"Zg=72;\n", +"alphan=20*%pi/180;\n", +"phi=24*%pi/180;\n", +"N=720;\n", +"mn=5;\n", +"b=50;\n", +"sigut=600;\n", +"BHN=360;\n", +"Cs=1.4;\n", +"FOS=2;\n", +"sigb=sigut/3;\n", +"dp=mn*Zp/cos(phi);\n", +"Zp=Zp/(cos(phi))^3;\n", +"Zg=Zg/(cos(phi))^3;\n", +"Y=0.358+((0.364-0.358)*1.48/2);\n", +"Sb=b*mn*sigb*Y;\n", +"Q=(2*Zg)/(Zp+Zg);\n", +"K=0.16*(BHN/100)^2;\n", +"Sw=b*dp*Q*K/(cos(phi)^2);\n", +"v=2*%pi*N*dp/(60*2*1000);\n", +"Cv=5.6/(5.6+sqrt(v));\n", +"Peff=Sb/FOS;\n", +"Pt=Peff*Cv/Cs;\n", +"P=Pt*v;\n", +"P=P*10^-3;\n", +"\n", +" // printing data in scilab o/p window\n", +" printf('P is %0.3f kW ',P);\n", +"\n", +"//The difference in the value is due to rounding-off of the values." + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 26.4: HG4.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"// sum 26-4\n", +"clc;\n", +"clear;\n", +"Zp=25;\n", +"Zg=100;\n", +"P=5000;\n", +"N=2000;\n", +"alphan=20*%pi/180;\n", +"phi=15*%pi/180;\n", +"sigut=660;\n", +"Cs=1.5;\n", +"FOS=1.8;\n", +"v=10;\n", +"Zp1=Zp/(cos(phi))^3;\n", +"Zg1=Zg/(cos(phi))^3;\n", +"Y=0.348+(0.74*0.004);\n", +"sigb=sigut/3;\n", +"Cv=5.6/(5.6+sqrt(v));\n", +"//Sb=FOS*Peff\n", +"mn=FOS*P*Cs*60*1000*2*cos(phi)/(2*%pi*N*Cv*Zp*12*sigb*Y);\n", +"mn=mn^(1/3);\n", +"mn=2.5;\n", +"dp=mn*Zp/cos(phi);\n", +"Q=(2*Zg)/(Zp+Zg);\n", +"b=12*mn;\n", +"Sb=12*sigb*Y;\n", +"K=Sb*(cos(phi)^2)/(dp*Q*b);\n", +"BHN=sqrt(K/0.16)*100;\n", +"dg=mn*Zg/cos(phi);\n", +"phip=mn+(0.25*sqrt(dp));\n", +"ep=16+(1.25*phip);\n", +"phig=mn+(0.25*sqrt(dg));\n", +"eg=16+(1.25*phig);\n", +"e=ep+eg;\n", +"e=e*10^-3;\n", +"r1=dp/2;\n", +"r2=dg/2;\n", +"Pd=e*N*Zp1*b*r1*r2/(2530*sqrt(r1^2+r2^2));\n", +"v=2*%pi*N*dp/(60*2*1000);\n", +"//Let tangential component be TC\n", +"TC=(Cs*1845/mn)+(Pd*cos(alphan)*cos(phi));\n", +"\n", +"Sb=b*mn*sigb*Y;\n", +"\n", +" // printing data in scilab o/p window\n", +" printf('mn is %0.1f mm ',mn);\n", +" printf('\n TC is %0.0f N ',TC);\n", +" printf('\n Sb is %0.1f N ',Sb);\n", +" \n", +" //The difference in the value of Sb is due to rounding-off of t" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |