free .net barcode reader library Precision Engineering in Software

Creating Data Matrix ECC200 in Software Precision Engineering

Precision Engineering
Data Matrix ECC200 Recognizer In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Drawing DataMatrix In None
Using Barcode drawer for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
05 Jet fed axial flow model
DataMatrix Scanner In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
ECC200 Encoder In Visual C#
Using Barcode generation for .NET framework Control to generate, create DataMatrix image in .NET framework applications.
04 Loss due to dispersion
Printing Data Matrix In .NET
Using Barcode encoder for ASP.NET Control to generate, create Data Matrix image in ASP.NET applications.
Encoding Data Matrix ECC200 In .NET Framework
Using Barcode encoder for .NET framework Control to generate, create Data Matrix ECC200 image in Visual Studio .NET applications.
Loss due to non-axial flow
Draw DataMatrix In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create Data Matrix 2d barcode image in VS .NET applications.
Generating ANSI/AIM Code 39 In None
Using Barcode maker for Software Control to generate, create Code 39 Extended image in Software applications.
Load coefficient CL(at e = 05)
Bar Code Encoder In None
Using Barcode generation for Software Control to generate, create barcode image in Software applications.
Generate Bar Code In None
Using Barcode creation for Software Control to generate, create bar code image in Software applications.
n= jet feeding n = 16 K = 06 go n=8
Encode EAN13 In None
Using Barcode generator for Software Control to generate, create GS1 - 13 image in Software applications.
Universal Product Code Version A Maker In None
Using Barcode encoder for Software Control to generate, create UPC-A Supplement 2 image in Software applications.
02 6 slots per row Kgo = 02
DUN - 14 Creation In None
Using Barcode encoder for Software Control to generate, create ITF-14 image in Software applications.
Make EAN13 In Java
Using Barcode creation for Java Control to generate, create EAN13 image in Java applications.
01 Feeding at quarter stations circumferential slots simple orifices with circular pockets
Reading GTIN - 12 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Bar Code Printer In Java
Using Barcode maker for Android Control to generate, create barcode image in Android applications.
10 Length-to-diameter ratio L/D
Scan Bar Code In Visual Studio .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Print Code 128 Code Set A In Java
Using Barcode creation for Java Control to generate, create Code 128A image in Java applications.
Fig 754: Comparison of jet fed and slot fed journal bearings [3]
Code 128 Generator In Objective-C
Using Barcode generator for iPad Control to generate, create Code 128 Code Set C image in iPad applications.
Code 128 Code Set B Creation In Visual Studio .NET
Using Barcode generator for Reporting Service Control to generate, create Code 128 image in Reporting Service applications.
beginning of this section, whereas q is the value of the vertical axis (ie 03) at the intersection between the solid curve and L/D (0) CL = 0375 CL = 0244 The load carried is calculated by W = CL (Po Pa) L D
0195 030
Gas Lubricated Bearings
Calculated for 6 entries Pa = 3Pa
e = 09
Load coefficient CL = W (Po Pa) LD I L DK
DK 05 e = 05
CL = 1
Stiffness dW= (Po Pa) LD (1 I/L) d(DK) dh ho de
05 Gauge pressure ratio Kgo
10 30
For double entry ho y 1 3 ; a1 3 = z I for single entry h 2y 1 3 a1 3 = o z I
10 20 d(DK) de
a 1/3
Gas flow 2 pDh3 (P 2 Pa ) o M= o 12mRTI (1 + x)
0 0 05 Gauge pressure ratio Kgo 10
Fig 755: Characteristics of short journal bearings with circumferential slots [3]
Precision Engineering
W = 0244 75 3 2 4895 N W = 110 lbf The mean radial stiffness up to this eccentricity ratio for a diametrical clearance of 0001 in is K =
2W 2(110) = = 440000 lbf/in ho 5 10 4
77000 N/mm
At an eccentricity ratio of 09, the load capacity of the slot-fed bearing is 160 lbf This is shown as follows: The value of K (0711) is read from the intersection of the gauge pressure ratio of 04 and the curve of e = 09 in the first part of Figure 755
l CL = 1 K = (1 05 ) 0711 = 0356 L W = CL (Po Pa) D L = 0356 75 2 3 = 160 lbf (712 N) On the other hand, the load capacity of the simple orifice compensated bearing would be 176 lbf This is also shown as follows: The value of CL (0355) is read from the intersection of L/D = 15 and the curve of l/L = 025 in Figure 750 For e = 09, multiply CL by 165
W = 165 C L ( Po Pa ) D 2 = 165 0355 75 4 = 176 lbf (783 N) Thus, the load capacity and the stiffness of the two bearings are closely comparable The intersection between the gauge pressure ratio of 04 and the dashed curve in the second chart of Figure 755 gives the a1/3 value of 14 The a value is calculated from
3 = 14 a = 275 The thickness of the feed slot, z can now be determined since the other parameters are known (ho = 5 10 4 in, a = 275) l is the distance from the end of the bearing, where it is the product of one-fourth (for the one-quarter feeding) and the length of the bearing (l = 1/4 3 = 075 in) y is given as 075 in which is the thickness of the bearing sleeve (Figure 740) The width of the slot is then
ho y z l
1/ 3
h y 3 5 10 4 075 3 = 18 10 4 in z = o = 00046 mm 275 075 l This design highlights the difficulty in making slot-fed bearings The accurate manufacturing of such fine slots requires the utmost precision and is often prohibitively expensive Moving the slots closer to the ends of the bearing eases the manufacturing constraint A similar procedure can be
Gas Lubricated Bearings
repeated for the one-eighth feeding by changing the value of l to 1/8 3 = 0375 in With the oneeighth station feeding, the width of the slot will become 23 10 4 in (58 m) The airflow for the slot-fed bearings is similar to the simple orifice feeding and can be obtained from Figure 744 The airflow of 023 cfm for Kg = 04 and the one-quarter feeding is read from the intersection of the diameter (2 in) and the length (3) This value is corrected for a supply pressure of 75 lbf/in2 [023 (75/100) = 015 cfm] For the one-eighth feeding, this value (015 cfm) is multiplied by 2 obtained from the intersection of a length-to-diameter ratio of 0125 and the curve in Figure 752 (a) The design can also be repeated for different supply pressure ratios by following the same stepby-step procedure to obtain a final design that can be manufactured within the capability of the machine and cost However, it must be remembered that the optimum supply pressure ratio is 02 The final design specification is presented in Table 74 and is shown in Figure 756 The main difference between the two types of feedings can be clearly seen in Table 75 It is obvious that the slot fed aerostatic journal bearing offers more advantages However, these advantages come at a price The manufacturing process of the slots is generally more difficult and costly Therefore, the choice depends on the particular application itself Table 74 The final design specification for slot feeding
Final design dimensions: Diameter Length Diametrical Clearance Feeding Thickness of Bushing Width of Slots Radial Load Capacity Radial Stiffness Airflow 2 in (508 mm) 3 in (762 mm) 0001 in (00254 mm) Six circumferential slots at the one-eighth station 075 in (1905 mm) 23 10 4 in (58 m) 110 lbf (at e = 05), 4895 N 440 000 lbf/in (0 < e < 05), 77 000 N/mm 030 scfm (00085 m3/min)
Performance for a supply pressure gauge of 75 lbf/in2:
Copyright © OnBarcode.com . All rights reserved.