Intro Predictive Maintenance 2 Part 5 pot

... - K M g KK M g KK K c c 3 1 2 13 2 2 23 3 w w A A M g KK K c 1 2 2 2 23 3 = - w A A K M g KK c 1 2 3 1 2 13 = - w A A 1 2 , XA t XA t 11 22 = () = () sin sin w w M g XKKXKX c 2 223 231 0 ˙˙ ++ () -= M g XKXKXX c 2 222 3 12 ˙˙ =- ... ratio c M g c c n ==Critical damping 2 w X F cK M g F K c c c K M g c c o c ncn c cn n = () +- Ê Ë Á ˆ ¯ ˜ = - Ê Ë ˆ ¯ +¥ Ê Ë ˆ ¯ = -...

Ngày tải lên: 12/08/2014, 02:22

... + () ++ () ++ () + 01 1 2 2 3 3 23 sin sin sin .wf wf wf XX X a tb t=+= () + () 12 1 2 sin sinww Xa t Xb t 11 22 = () = () sin sin w w Vibration Monitoring and Analysis 129 this is not practical ... begun. Therefore, 75% of each sample is new. As a result, accuracy may be reduced by as much as 25 % for each data set. 50 The last 50 % of the previous block is added to a new 50 %...

Ngày tải lên: 12/08/2014, 02:22

... techniques must be used as part of a comprehensive predictive maintenance program. 9.1 .2 Wear Particle Analysis Wear particle analysis is related to oil analysis only in that the particles to be studied ... and Process Parameters 22 5 ignition problems, improper timing, or other deficiencies may cause it. Fuel dilution is considered excessive when it reaches a level of 2. 5 to...

Ngày tải lên: 12/08/2014, 02:22

... 121 , 399 Vibration sources, 122 rotating machinery, 122 reciprocating and linear, 124 Vibration theory, 1 25 periodic motion, 1 25 harmonic motion, 1 25 , 127 non-harmonic motion, 128 Viscosity, 20 3 Visual ... 8 3 25 .pdf Created on July 26 , 20 02 20:31:40 by Enfocus PitStop 4. 05 Page 2 438 Index limitations of, 109 wear particle analysis, 20 5 Total acid number, 20 4 To...

Ngày tải lên: 12/08/2014, 02:22

... .9 62 .909 .870 .833 2 1.970 1.9 42 1.886 1.736 1. 626 1. 52 8 3 2. 941 2. 884 2. 7 75 2. 487 2. 283 2. 106 4 3.9 02 3.808 3.630 3.170 2. 855 2. 58 9 5 4. 853 4.713 4.4 52 3.791 3.3 52 2.991 6 5. 7 95 5.601 5 .24 2 ... $1 Interest Periods 1% 2% 4% 10% 15% 20 % 1 1.010 1. 020 1.040 1.100 1. 150 1 .20 0 2 .50 8 .51 5 .53 0 .57 6 .6 15 . 654 3 .340 .347 .360 .4 02...

Ngày tải lên: 12/08/2014, 02:22

... both the driver and driven machine-train component. Each Chain Speed = 25 teeth 1 rpm 25 0 links cpm rpm ¥ == = 00 25 00 25 0 10 10 Chain Speed = Number of Drive Sprocket Teeth Shaft Speed Number ... monitored when possible. 96 An Introduction to Predictive Maintenance Figure 5 12 Rolls should be uniformly loaded. problem is not limited to effective measurement of predictive...

Ngày tải lên: 12/08/2014, 02:22

... Emissivity Metals Alloys 20 -Ni, 24 -CR, 55 -FE, 3 92 200 0.9 Oxidized 20 -Ni, 24 -CR, 55 -FE, 9 32 50 0 0.97 Oxidized 60-Ni, 12- CR, 28 -FE, 51 8 27 0 0.89 Oxidized 60-Ni, 12- CR, 28 -FE, 1040 56 0 0. 82 Oxidized 80-Ni, 20 -CR, ... Rolled 150 0 21 00 816–1149 .56 –.81 Type 316, Polished 75 24 0 .28 Type 316, Polished 450 23 2 0 .57 Type 316, Polished 1740 949 0.66 Type 3...

Ngày tải lên: 12/08/2014, 02:22

... and further, what the effect of such changes may be. 26 2 An Introduction to Predictive Maintenance Figure 12 1 “Go/no-go” standards. Figure 12 2 Accelerometer to measure vibration of rotating shaft. 10.9 ... Wavelength, feet a = Speed of sound = 1,1 35 feet/second n = Compressor speed, revolutions/minute l == 60 2 34 050 a nn , 23 8 An Introduction to Predictive Maintenance Tab...

Ngày tải lên: 12/08/2014, 02:22

... theoretical performance. 27 6 An Introduction to Predictive Maintenance 20 0 100 100 20 0 300 400 50 0 600 700 800 1000 150 50 65% 70% 75% 80% 80% 75% 70% 65% BEP 15 HP 15 HP 20 HP 20 HP Total Dynamc Head ... (Feet) 65% 70% 80% 80% 70% 75% 65% 75% Best Efficiency Point (BEP) Figure 13–3 Simple hydraulic curve for centrifugal pump. 20 0 100 100 20 0 300 400 5...

Ngày tải lên: 12/08/2014, 02:22

... production capacity and 328 An Introduction to Predictive Maintenance Figure 14–34 Eccentric sheaves. 320 An Introduction to Predictive Maintenance Figure 14– 35 Light and heavy spots on an unbalanced ... well-planned Establishing a Predictive Maintenance Program 327 310 An Introduction to Predictive Maintenance Figure 14 21 Unloaded gear has much higher vibration levels....

Ngày tải lên: 12/08/2014, 02:22