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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /764/CH14/EX14.3.b | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '764/CH14/EX14.3.b')
| -rwxr-xr-x | 764/CH14/EX14.3.b/result14_3.txt | 82 | ||||
| -rwxr-xr-x | 764/CH14/EX14.3.b/solution14_3.sce | 25 |
2 files changed, 107 insertions, 0 deletions
diff --git a/764/CH14/EX14.3.b/result14_3.txt b/764/CH14/EX14.3.b/result14_3.txt new file mode 100755 index 000000000..ad658277f --- /dev/null +++ b/764/CH14/EX14.3.b/result14_3.txt @@ -0,0 +1,82 @@ +-->//(Chain Drives) Example 14.3
+
+-->//Power rating of electric motor kW
+
+-->kWd = 5
+ kWd =
+
+ 5.
+
+-->//Speed of the motor n1 (rpm)
+
+-->n1 = 1400
+ n1 =
+
+ 1400.
+
+-->//Speed reduction i
+
+-->i = 3/1
+ i =
+
+ 3.
+
+-->//Centre distance a (mm)
+
+-->a = 500
+ a =
+
+ 500.
+
+-->//Number of teeth on the driving sprocket z1
+
+-->z1 = 21
+ z1 =
+
+ 21.
+
+-->//Change the following data accordingly
+
+-->//Find service factor for moderate shock conditions from table 14.3 on page 551
+
+-->Ks = 1.3
+ Ks =
+
+ 1.3
+
+-->//Find multiple strand factor from table 14.4 on page 551
+
+-->//For 1 strand
+
+-->K1 = 1
+ K1 =
+
+ 1.
+
+-->//Find the tooth correction factor from table 14.5 on page 551
+
+-->//For 21 teeth
+
+-->K2 = 1.26
+ K2 =
+
+ 1.26
+
+-->//After choosing the chain, alter following data accordingly
+
+-->//pitch p (mm)
+
+-->p = 12.7
+ p =
+
+ 12.7
+
+
+Choose appropriate chain from table 14.2 on page 550 for 5.158730 kW power transmitted at 1400.000000 rpm
+
+Here, we choose chain 8A (5.28 kW rating)
+
+Number of chain links(Ln) = 121.875097 or 122.000000
+
+Correct centre distance between the sprocket axes(a) = 500.804717 mm
+
\ No newline at end of file diff --git a/764/CH14/EX14.3.b/solution14_3.sce b/764/CH14/EX14.3.b/solution14_3.sce new file mode 100755 index 000000000..4f7d4f4e0 --- /dev/null +++ b/764/CH14/EX14.3.b/solution14_3.sce @@ -0,0 +1,25 @@ +
+//Obtain path of solution file
+path = get_absolute_file_path('solution14_3.sce')
+//Obtain path of data file
+datapath = path + filesep() + 'data14_3.sci'
+//Clear all
+clc
+//Execute the data file
+exec(datapath)
+//Calculate the kW rating of the chain
+kW = kWd * Ks/(K1 * K2)
+printf("\nChoose appropriate chain from table 14.2 on page 550 for %f kW power transmitted at %f rpm\n",kW,n1)
+printf("\nHere, we choose chain 8A (5.28 kW rating)\n")
+//Calculate the number of teeth on driven sprocket z2
+z2 = i * z1
+//Calculate the number of chain links Ln
+Ln = 2*(a/p) + (z1 + z2)/2 + ((z2 - z1)/(2*%pi))^2 * (p/a)
+Lnround = ceil(Ln)
+val = (Lnround - (z1 + z2)/2)
+//Calculate the correct centre distance anew (mm)
+anew = (p/4)*(val + sqrt(val^2 - 8*((z2 - z1)/(2*%pi))^2))
+//Print results
+printf("\nNumber of chain links(Ln) = %f or %f\n",Ln,Lnround)
+printf("\nCorrect centre distance between the sprocket axes(a) = %f mm\n",anew)
+
\ No newline at end of file |