Hits: 2181

Field Balance (Trim Balance)

When the rotating equipment have high vibration during commercial operation, there are many kinds of root cause to resolve the high vibration issue. And, in case of large rotating equipment, it is not easy to perform the completed train test with job coupling & driver at manufacturer’s shop. Then, the high vibration by unbalance, which was not occurred during shop test, can be measured during commissioning due to construction & assembly tolerance and actual operation condition. In order to avoid the critical operation under rotor imbalance condition, INERTANCE can perform Field balancing (Trim balancing) as per related balancing grade to reduce residual unbalance. In addition to that, INERTANCE has applied single and dual plane method, and also verified the balancing technic without phase measurement. 

Coupling Unbalance
Coupling Unbalance

Balancing gradeBalancing grade, API, ISO

Balancing grade, API, ISO

Unbalance Response Analysis

INERTANCE has a capability to perform below kinds of balancing work.

  • Field balancing for rotating equipment
  • Conditional monitoring for rotating equipment
  • Root cause analysis (RCA) for vibration trouble
  • Identification for rigid rotor / flexible rotor
  • Operating speed balancing
  • Single plane balancing
  • Dual plane balancing
  • Single plane balancing without phase
  • Dual plane balancing without phase
  • Pump, Compressor, Coupling, Turbine, etc
  • Residual unbalance check
  • Trim balancing
  • Application for trial weight, rotor sensitivity
  • Balancing grade application as per API, ISO
  • Other root cause such as Alignment, Looseness, Resonance, Rubbing, Oil Whip & Whirl, etc.

Imbalance Response Analysis

Below figure shows the example for single/dual balancing work on coupling hubs. Minimum four (4) times running including final run is necessary to complete the balancing with phase measurement.

Field-Balance, Trim-Balance
Field-Balance, Trim-Balance

In case vibration monitoring with phase measurement is not available at Site, there is a good way to perform the balancing work, even if there is no information regarding phase. Minimum eight (8) running including final run is necessary to complete the balancing without phase measurement.


Imbalance Response Analysis
Imbalance Response Analysis

INERTANCE has a capability regarding noise and vibration engineering, and our experts are familiar with assessment of Field Balancing. For further information, contact us at (mountain@inertance.com).

INERTANCE’s related services include;