外文翻譯--帶式輸送機(jī)自動(dòng)維護(hù)系統(tǒng)方法（英文）

1、 1 Strategies for Automated Maintenance of Belt Conveyor Systems Prof.dr.ir. Gabriel Lodewijks1 Delft University of Technology, the Netherlands Summary This paper discusses automation of maintenance of belt conveyor syst

2、ems, in particular of idler rolls. Automation of maintenance is a promising alternative for outsourcing maintenance, in particular when looking at the efficiency, accuracy, and costs. In order to optimise maintenance

3、efforts, the concept of intelligent maintenance is introduced. The powered maintenance trolley that can travel autonomously over the structure of a belt conveyor is adapted as a platform of the maintenance system. On

4、this trolley, data acquisition equipment for vibration analysis is installed. Data mining can be done either on board of the trolley or in a central computer depending on the maintenance strategy. The optimum maintena

5、nce strategy is determined by a logistic simulation model that accounts for the lay-out of the belt conveyor itself and the accuracy of the information on the remaining lifetime of its components. 1 Introduction Toda

6、y more and more companies outsource maintenance in an attempt to balance the budget and reduce the number of permanent staff members. Outsourcing maintenance however only works if the company that takes over maintenan

7、ce employs well-trained and experienced personnel that stays on a specific job for a considerable time. Unfortunately, reality is different and many companies have poor experiences with external companies performing m

8、aintenance. In general, maintenance on belt conveyor systems can be divided into inspection or condition monitoring of the total system and replacement and/or reparation (in short servicing) of its components. Most pr

9、oblems experienced with outsourcement of maintenance are associated with the inspection or condition monitoring of a system. It is not trivial to access the status of sometimes moving components of a belt conveyor. Th

10、e same experienced person should therefore carry out inspections on a regular basis. To overcome operational problems caused by a lack of experience of external maintenance personnel, the inspection of belt conveyor

11、 components can be automated. In this way knowledge of for example wear rates and replacement schedules can be built up in a data base system. The external maintenance crew then can be used to replace the worn off Copy

12、right is vested with IMHC Copyright is vested with IMHC 3 maintenance system that enables maintenance automation. Intelligence here is defined as the ability to make decisions based on information gathered through sens

13、ors in the equipment or provided by the control system of the total transport system. Applied to belt conveyor systems the information gathered from a system is information on the life expectancy of individual compone

14、nts as for example idler rolls. This information leads to a decision either to inspect a certain idler station and its rolls more frequently or to change a roll for a new roll. Repairing in fact here means changing on

15、e roll for another. Whether or not a roll can be repaired and the effect of that on the belt conveyor’s performance is outside the scope of this study. The main issue in this study is the question how an automated ins

16、pection strategy is affected by the accuracy of the data acquired. In theory there are two outer limits in predictive maintenance. The first is that no accurate information of the rolls is available at all, basically

17、meaning that an assessment of the remaining lifetime is made purely on the basis of historical data provided by the roll or bearing manufacturers (predictive maintenance based on statistics). The second is that during

18、 inspection very accurate information on the status of rolls is generated enabling an accurate assessment of the remaining lifetime of an individual roll (predictive maintenance based on data). A logistic simulation m

19、odel is made to determine the effect of the accuracy of data acquired on automated inspection strategies. This model is discussed in Section 5. 3 Existing inspection systems One problem faced with inspection or condit

20、ion monitoring of components of belt conveyors, including the belt, pulleys and idler rolls, is that they rotate. Since the condition of components like rolls and pulleys can only be assessed when they are rotating, o

21、nly condition monitoring systems based on vibration analysis or acoustical monitoring can be used. The opposite holds for the belt. The belt’s condition can only be inspected when the belt conveyor system is not opera

22、ting. Either way, an inspector has to walk the full length of the conveyor to inspect its components. An associated problem is that pulleys may be far apart from each other or that the conveyor has a great length. To

23、ease inspection in these cases a powered maintenance trolley can be used for inspection purposes. The concept of a powered maintenance trolley is not new. An early example of a maintenance trolley used on a belt convey

24、or system was the trolley used on the 100 km Phosboucraa overland system built by Krupp in the 70-ties to transport raw phosphate across a distance of 100 km from inside the west Sahara across a desert of stones to th