An introduction to predictive maintenance - part 4 pdf

... is impor- tant that single-channel analysis be augmented with multichannel and dynamic analy- sis. Total reliance on single-channel techniques severely limits the accuracy of analysis and the ... elements that can be used to describe the function. These common elements are peak -to- peak, zero -to- peak, and root-mean-square, each of which are illustrated in Figure 7–11. Peak -to- peak. As...

Ngày tải lên: 08/08/2014, 11:21

... speed and bearing rotational fre- 94 An Introduction to Predictive Maintenance Rotor passing. The male and female rotors act much like any bladed or gear unit. The number of lobes on the male rotor ... ranging from relatively inexpensive, black-and-white scanners to full-color, microprocessor-based systems. Many of the less expensive units are designed strictly as scanners and c...

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... plants. Predictive maintenance is a condition-driven preventive maintenance program. Instead of relying on industrial or in-plant average-life statistics (i.e., mean-time -to- failure) to schedule maintenance ... Predictive Maintenance Like preventive maintenance, predictive maintenance has many definitions. To some workers, predictive maintenance is monitoring the vib...

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... 6.8 14 5 .42 1 4. 439 18 16.398 14. 992 12.659 8.201 6.128 4. 812 24 21. 243 18.9 14 15. 247 8.985 6 .43 4 4. 937 36 30.118 25 .48 9 18.908 9.677 6.623 4. 993 48 37.9 74 30.673 21.195 9.897 4. 999 4. 999 60 44 .955 ... 2. 040 2.100 2.150 2.200 3 2.030 3.060 3.122 3.310 3 .47 2 3. 640 4 4.060 4. 122 4. 246 4. 641 4. 993 5.368 5 5.101 5.2 04 5 .41 6 6.105 6. 742 7 .44 2 6 6....

Ngày tải lên: 08/08/2014, 11:21

... delays represent more than 30 percent of total 44 An Introduction to Predictive Maintenance Too many maintenance functions continue to pride themselves on how fast they can react to a catastrophic ... Introduction to Predictive Maintenance Role of Maintenance Organization 53 Larry Smith Charger Kit A/C 544 PM-A Recharge Freon in A/C 44 Maint. Planning EXT. 356 5/...

Ngày tải lên: 08/08/2014, 11:21

... Emissivity Metals Alloys 20-Ni, 2 4- CR, 55-FE, 392 200 0.9 Oxidized 20-Ni, 2 4- CR, 55-FE, 932 500 0.97 Oxidized 60-Ni, 12-CR, 28-FE, 518 270 0.89 Oxidized 60-Ni, 12-CR, 28-FE, 1 040 560 0.82 Oxidized 80-Ni, 20-CR, Oxidized ... per second). Motor alternator A device that consists of an AC generator mechanically linked to an electric motor, which is driven by utility power or by bat- te...

Ngày tải lên: 08/08/2014, 11:21

... operational controls and maintenance controls is not important because the result is a reduced 2 64 An Introduction to Predictive Maintenance Figure 12–3 Normal distribution of failures. This predictive maintenance ... aligned is to hard blue the gears immedi- 244 An Introduction to Predictive Maintenance Table 10–13 Common Failure Modes of Cyclonic Separators TH...

Ngày tải lên: 08/08/2014, 11:21

... (2¥) component; and the third critical excites the third (3¥) frequency component. 286 An Introduction to Predictive Maintenance 308 An Introduction to Predictive Maintenance Figure 14 18 Typical ... travel generates a fre- 290 An Introduction to Predictive Maintenance Figure 14 2 Multiplane imbalance generates multiple harmonics. total pressure required to ove...

Ngày tải lên: 08/08/2014, 11:21

... accompanied by noise and smoke, causing belts to overheat and be glazed in appearance. It is important to replace worn belts. 3 24 An Introduction to Predictive Maintenance measurement routes and ... establishing a predictive mainte- nance database. The only steps remaining to get the program started are to establish 348 An Introduction to Predictive Maintenance...

Ngày tải lên: 08/08/2014, 11:21

... of each mea- surement point on a common-shaft. Figure 17–1 illustrates this technique for a 390 An Introduction to Predictive Maintenance World-Class Maintenance 399 maintenance organization work ... instruments, erratic readings, 362 An Introduction to Predictive Maintenance The technicians will be trained in advanced maintenance techniques, such as predictive ma...

Ngày tải lên: 08/08/2014, 11:21