Maintenance & Inspection of Rotating Machinery

MAI/ROTMAINT

Who should attend?

  • This course underlines the general technologies of rotating machinery and their auxiliaries.
  • It covers the functioning of the machines in their process application, the mechanical aspects, wears and ruptures, lubrication as well as the inspection for functional anomalies.
  • Therefore, it provides the necessary knowledge to inspect the machines and set up a diagnosis.
Audience :
  • Engineers, supervisors and maintenance technicians, mechanical work preparers, technicians from new works department, inspection, oil and petrochemical industry methods.

Level : Proficiency

Course Content

  • GENERAL CHARACTERISTICS & TECHNOLOGY OF ROTATING MACHINES

      • Fields of use and characteristics of the main rotating machines.
      • Reliability of the different machines.
      • Technological descriptions.
      • Functioning (2 days)
      • Operating parameters, meaning, how to interpret changes: pressure, temperature, flow rate, speed, head, efficiency…
      • Characteristics of the machines, comparisons.
      • Effect of external process-related parameters: composition of the products, modified suction or discharge conditions.
      • Mechanical aspects:
      • Stresses in the machine in normal operation and in abnormal conditions: operating limits.
      • Case of internal stresses: thrust, radial reaction, vibrations.
      • Case of external stresses: dilatation, vibrations, casing and supporting.
      • Influence on the machine lifespan.
      • Operating conditions (1 day)
      • General operating rules to comply with, effect on reliability.
      • Associated risks.
  • TECHNOLOGY & MAINTENANCE OF THE COMMON ELEMENTS

      • Bearings (1 day)
      • Ball bearings:
      • Description of the different rolling elements; identification, internal clearances, assembly.
      • Calculation of lifespans: effect of the feed, lubrication, humidity, clearances.
      • Hydrodynamic bearings:
      • Plain and pad bearings: description, functioning.
      • Incidents, problems of instability.
      • Magnetic bearings:
      • Description, functioning.
      • Lubrication of the bearings.
      • Shaft outlet sealing systems (1 day)
      • From braided seals to mechanical seals: functioning, description of the different types, conditions of stability, auxiliaries.
      • Application to pumps and compressors.
      • P&ID study of a complex mechanical seal of a centrifugal compressor.
      • Rotors and shafts (0.5 day)
      • Balancing: imbalance, eccentricity, balancing class.
      • Shaft geometric controls.
      • Couplings and alignments (0.5 day)
      • Different types of couplings.
      • Transmission stresses.
      • Alignment of the shafts of machines.
  • INSPECTION & FAILURE FORECAST

      • Diagnosis from process data (0.5 day)
      • Determining a functioning point.
      • Checking the performance: head, flow rate, efficiency.
      • Diagnosis of a failure by vibrations and oil analyses (0.5 day)
      • Measuring the vibrations: initiation, global levels, spectrum, frequency/failing element association.
      • Oil analyses: water content, water and air separation, viscosity, acid value, chemical analyses, ferrography.
      • Application: examination of different oil spectrum and reports of analysis.
      • Knowledge of wear and rupture phenomena (1 day)
      • Fundamentals of inspection and deduction.
      • Friction and materials, roughness, surface condition, fretting corrosion.
      • Main rupture modes (stress, fatigue, impact, creep…).
      • Notion of elastic resistance, plastic resistance, resilience.
      • Frequent problems: detection and troubleshooting (1 day)

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • know the functioning of the machines and their components,
  • know the mechanical effects induced by a change in operating conditions,
  • master the failure modes of the different components,
  • know how to avoid sudden failures and how to carry out diagnosis on the machines.

Ways & Means

  • Functional approach and practice of rotating machinery.
  • Reminder of the methods and fundamentals of assembling, disassembling, clearance and dimensional control.
  • Illustration with case studies and analysis of information folders.