Lecturer in Mechanical Engineering – Vibration Analysis Job vacancy

 

Job in

UK

Engineering, Geoscience
HRODC Postgraduate Training Institute requires the services of a Mechanical Engineer, to fill the Associate Position of Lecturer and...
Skills Needed: 1. The ability to function effectively in a Professional Setting;
2. Knowledge and skills in course and programme design and delivery;
3. Willingness to learn to function in an academic environment
4. Desire to Deliver Short Courses, Intensive Full-Time and Full-Time Programmes
5. Commitment to Deliver Courses and Programmes on Proximity (Classroom Based) and Video-Enhanced On-Line Line Modes;
6. The ability to function effectively in a Professional Setting;
7. Desire to acquire knowledge and skills in course delivery;
8. Ability to adjust to working in an academic environment;
9. Ability to create PowerPoint Presentations;
10. Ability and willingness to undertake International Travel;
11. Willingness to undertake associated administrative duties;
12. Familiarity and competence in relevant contents, concepts and issues exemplified by the following:
Part 1: Vibration Analysis - Fundamentals
 Introduction to Vibration;
 Defining Vibration Analysis;
 Typical Vibration Instruments;
 Motion - R.M.S. Technique;
 Vibration Amplitude Measurement;
 Peak Vibration;
 Peak to Peak Vibration Measurement;
 Displacement, Velocity and Acceleration;
 Units and Unit Conversion;
 Spectrum Analysis;
 FFT Spectrum Analyzer Technology;
 Frequency Vibration;
 Natural Frequency;
 Generated Frequency;
 Resonant Frequency;
 Basic Forcing Frequency Calculations.
Part 2: Fundamental Vibration Analysis Concepts and Issues
 Defining Mass and Its Units of Measurement;
 Use of Vibration in Evaluating Machinery Condition;
 The Concept of Velocity;
 The Concept of Frequency;
 Exploring Time Waveform Phase;
 Discrete Fourier Transform (DFT);
 Fast Fourier Transformation (FFT) Techniques;
 Exploiting Displacement;
 Defining Speed;
 Deducing Acceleration
 Detecting High Vibration;
 Sensor Variations;
 Analogue Instrumentation – Shortcomings;
 Digital Technology – Advantages;
 Vibration alarms;
 Spectral band alarms.
Part 3: Effecting an Enhanced Maintenance Programme
 Basic Fault Identification;
 Vibratory Fault Characteristics and Patterns;
 Overall Level Measurements;
 Mechanical Analysis;
 Harmonic Measurements;
 Harmonic Distortion Measurement;
 Alarm Limits, Trending and Exception Reports;
 Preventive Maintenance;
 Predictive Maintenance;
 Reliability-Centered Maintenance Programmed (RCM);
 Fault Diagnosis - Common Electric Motor Faults;
 Fault Diagnosis - Common Pump, Fan and Compressor Faults;
 Fault Diagnosis - Rolling Element Bearing Wear;
 Fault Diagnosis – Imbalance;
 Fault Diagnosis – Misalignment;
 Fault Diagnosis – Looseness;
 Fault Diagnosis – Eccentricity;
 Fault Diagnosis – Resonance;
 Fault Diagnosis - Bearings Defects;
 Fault Diagnosis - Gears Defects;
 Fault Diagnosis - Belts Defects;
 Common Belt Drive and Gearbox Faults;
 Electric Motors Defects;
 Detection of Electrical Problem within Induction Motors.
Part 4: Instrumentation and Condition Monitoring
 Rotating Equipment Types;
 Rotating Equipment Applications;
 Rolling Element Bearings;
 Journal Bearings;
 Equipment Failure Modes;
 Condition Monitoring Technologies;
 Condition Monitoring Technologies – Vibration;
 Condition Monitoring Technologies – Oil;
 Condition Monitoring Technologies – Emission;
 Condition Monitoring Technologies - Electric motor testing;
 Condition Monitoring Technologies - Wear particle;
 Condition Monitoring Technologies – Infrared;
 Condition Monitoring Technologies – Acoustic.
Part 5: Data Acquisition Techniques
 Instrumentation;
 Transducers and transducer mounting;
 Measurement point naming conventions;
 Routes surveys;
 Loading and unloading the route;
 Data collection;
 Following a route;
 Repeatable data collection;
 Test procedures;
 Observations: best utilizing your time in the field;
 Recognizing bad data.
Part 6: Fundamentals of Machinery Vibration
 Key Concepts – Mass;
 The concept of Stiffness;
 Mechanical Resonance;
 Conceptualizing Damping;
 Un-damped Free Vibration;
 Damped Free Vibration;
 Damped Force Vibration;
 Lateral Vibration Characteristics;
 Rigid - Body Vibrations;
 Flexible Shaft Vibrations;
 Mode Shapes and Critical Speeds of General Motor Bearing Systems.
Part 7: Deconstructing Bearings
 Journal and Thrust Bearings:
• Types of Fluid Film Bearings;
• Selection of Bearing Type;
• Selection of Bearing Dimensions;
• Self-acting Thrust Bearings;
• Design Data for Tilting-Pad Thrust Bearings;
• Calculated Thrust Bearing Stiffness & Damping.
 Ball Bearings:
• Bearing Design Factors;
• Fatigue Life;
• Bearing Lubrication;
• Dynamics of Ball Bearings.
 Rotor Bearing System Dynamics:
• Spring and Damping Coefficient;
• Rotor Response Analysis;
• Rotor Dynamics For a Typical Machine.
 Rotor Response to Various Forces:
• Type of Forces;
• Response to Unbalance;
• Response to Other Forces.
 Rotor Bearing System Instability:
• Dynamic Instability in Rigid-Body Systems;
• Complicating Factors;
• Control of Rotor Instability.
Part 8: Bearings and Vibration, and Rotor and Shaft Balancing
 Bearings Vibration Analysis:
• Analytical methods for calculating vibration amplitudes;
• Troubleshooting analysis;
• Diagnostic procedures;
• Machinery faults and vibration frequencies;
• Vibration at running speed;
• Shaft surface defects and proximity probe readings;
• Vibration amplitude jump phenomenon;
• Beating of two adjacent frequencies;
• Harmonics;
• Sub-synchronous vibrations;
• Modulation;
• Vibration of ball and roller bearings.
 Rotor and Shaft Balancing:
• Balancing of Rotors and Shafts;
• Single Plane Balancing;
• Balancing in a Commercial Balance Machine;
• In Place Rotor and Shaft Balancing.
Part 9: Vibration Data Analysis, Interpretation and Problem Resolution
 Acquiring Data to Define the Problem;
 Long-Term History of Machine;
 Field Measurement Data Acquisition;
 Field Measurement Data Assessment;
 Field Measurement Data Interpretation;
 Torsional Vibration Modelling;
 Sources of Torsional Excitation;
 Transient Response;
 Damping;
 Interpretation of Analysis.
Part 10: Forcing Frequencies, Sonar, Acoustic and Seismic Measurements
 Using Units of Orders Instead of Hz or CPM;
 Calculating Forcing Frequencies;
 Identifying Shaft Speed;
 Blade and Vane Passing Frequencies;
 Bearing Frequencies;
 Gear Mesh Frequencies;
 Gear and Belt Driven Machines (Multiple Shafts with Different Turning Speeds);
 Parametrically Excited Surface Waves;
 Normal Form Symmetries;
 Linear Measurement Instruments;
 Seismic or Acoustic Emission;
 Acoustic Measurement Instrument;
 3D Seismic Surveys;
 4D Seismic Mapping.
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