Machinery Problem Solver
Below are some of the common problems that TRI has dealt with over the years. The TRI Machine Problem Solver is a tool to help customer identify problems and locate solutions.
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Begin by clicking on one of the listed problems in the left column. This will highlight (turn blue) some of the possible causes.
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From the middle column, select one of the highlighted "causes". The "cause" will turn red and the possible solutions will be highlighted in blue.
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Click on one of the "solutions" to see more information about the topic.
Machinery Problem
Click a problem and to see the probable causes
- Rotor synchronous vibration
- Rotor nonsynchronous vibration
- Torional vibration
- Bearing failure/excessive wear
- Seal failure/excessive wear
- Blade failure
- Flow/duct/pipe interactive vibration
- Structure vibration
- Poor component performance in flow systems
- Poor stage performance
- Component crosstalk
- Inadequate cirulating water systems
- System sensitivity to process changes
- High maintenance mechanical problems
- System monitoring & interpretation
- Dynamic testing
- Rotor balancing
- High temperatures
Causes
Click a highlighted cause to see the possible solutions
- Lateral Critical speeds in operating ranges
- Torsional Critical speeds in operating ranges
- Mass unbalance distribution
- Coupling misalignment
- Shaft bending nodes at/near beaing locations
- Fluid dynamic excitation forces
- Random external loading
- Internal friction or hysteresis
- Lack of lube film in bearings
- Unloaded bearings
- Misalignment of bearings
- Insufficient bearing damping
- Coinciding criticals of connected components
- Bull gear critical close to pinion speed
- Unsteady flow, pressure fluctuations at nozzle passing frequency
- Natural frequencies of blades interfering with stator blade passing frequencies
- Vortices in pump inlet
- Inadequate cooling water system
- Mismatched components
- Turbulent flow from high volume fan
- Inadequate structural stiffness for dynamic operating conditions
- Improper matching of support/rotor stiffness
- Poor placement of monitoring sensors
- Seals acting as bearings
- Marginally stable rotor/bearing design
- Parts not made of assembled to prints
- Poor maintenance practices
- Inadequate system/component characteristics
TRI Solutions
Click a solution to see how TRI can help solve your problem
- Bearing Redesign
- Rotor Redesign
- Coupling Redesign
- Seal Redesign
- Support Structure Redesign
- Tune Natural Frequencies
- Change No. of Nozzles and/or Blades
- Stage Performance Redesign
- Smooth-out Flow
- Lube Oil Filtration
- In-place Balancing
- Minimize Inlet Flow Restrictions
- Improve System Component Matching
- Improve Maintenance Techniques
- Alignment
- Improve Instrumentation Techniques
- TRI System Characterization
- TRI Field Rebuild & Test Supervision
- TRI Field Operation/Mainte