maintenance_engineering.pdf

Aim and objective of cbm to intervene before the

This preview shows page 49 - 57 out of 252 pages.

Aim and objective of CBM To intervene before the failure occurs To do maintenance only when needed To reduce number of failure and also number of shut downs To reduce maintenance cost and cost due to production loss Increase in the operating life of replacement items
Image of page 49

Subscribe to view the full document.

Benefits include: Reduction/elimination of unplanned failures Reduced overall maintenance costs Improved equipment performance - Key Performance Indicators (KPIs) Increased asset life Reduction/elimination of collateral damages Prioritized actions and jobs made easier Increased efficiency of maintenance management Avoiding opening up of equipment at fixed intervals Increased uptime/reduced downtime
Image of page 50
Methodology of condition Based Maintenance Listing and codification of all machine/ equipment for proper identification and location Selection of critical machines and system Machine and system may be classified as very critical, critical and least critical. If the machine system is very important for the production If the machine/ system is very costly to repair If the failure of machine/system could result in injury of loss of life or serious damage to environments. Identifying components / items : very critical , critical and less critical machines systems
Image of page 51

Subscribe to view the full document.

Fixing conditions parameters these identified components (items ) have to be transformed into condition parameters which are actually measured or monitored such as temperature, pressure, flow , vibration, noise magnetic flux Monitoring Techniques For each condition parameters , relevant measuring and monitoring techniques are selected and for these suitable equipment /instruments/ implements are identified.
Image of page 52
Monitoring schedules and frequency To decide about the frequency of monitoring (daily, weekly , monthly , continuous ) some monitoring / inspection can be done online / for some offline Trend Monitoring The inspection records, thus obtained and decoded , analyzed and compared with the maximum allowable limits or earlier data if available . Repair schedule and execution Based on the assessments indicated by trend monitoring necessary repair action are planned , scheduled and executed for correction the deterioration before the deterioration reach higher limits Follow up After the repair the conditions parameters are again inspected and analyzed to ensure that the defects , identified earlier were repaired correctly and goes on.
Image of page 53

Subscribe to view the full document.

SCORE Model
Image of page 54
KU Experiment-06 on SCORE Test Rig III with Nottingham configuration Tc left Tc right Th left P2pk P1pk Th right 0 10 20 30 40 50 60 70 80 90 100 0.00 200.00 400.00 600.00 800.00 1000.00 1200.00 1400.00 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 power Wth, mBar, Temp minutes Performance Pmean (LHS scale mBar) Th-Tc Right scale K Thleft frequency Tcright Tcleft
Image of page 55

Subscribe to view the full document.

Routine Maintenance Means carry ing out minor maintenance job at regular intervals .
Image of page 56
Image of page 57
  • Fall '19
  • Magnetic Field, Preventive maintenance, Nondestructive testing

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern