TechnologyReliability

Cavitation Testing & Analysis

If cavitation occurs during pump operation, it can cause a drop in performance and erosion of the impeller.
Tsurumi works to improve pump reliability through fluid analysis and a variety of tests.

High-Speed Camera
Video Camera

Structural Analysis of Pumps

Tsurumi uses structural analysis to optimize pump structures and geometries,
with the aim of reducing weight and improving performance.

Strength Verification of a Pump Casing
Displacement Verification
of a Vacuum Pump Impeller

Natural Frequency Analysis
of Pumps

If a pump’s natural frequency coincides with the excitation frequency generated by its rotating components during operation,
resonance may occur and cause excessive vibration.
Tsurumi therefore conducts natural frequency analysis during the design stage and reviews the pump structure to prevent resonance.

Measured Data
- Intermediate Coupling
  of a Multiple-Bed Type Pump
- Vibration Mode of the Intermediate Coupling
  in a Mixed-Flow Pump
Suction Tank Test / Analysis

At large pumping stations,
air-entraining vortices or submerged vortices may occur if pumps are improperly positioned or if the suction sump has a complex geometry,
potentially affecting pump performance.
When vortex formation is anticipated,
Tsurumi uses model testing and fluid analysis to predict vortex behavior and recommend appropriate preventive measures.

Vortex Prediction
Using Fluid Analysis
- Submerged Vortex Observed in Model Testing
- Vortex Control
Evaluation of Mixing Conditions
in the Tank

Flow analysis helps us understand flow conditions and velocity distributions within the tank during the early stages of product development.
It also provides important baseline data for verification testing using full-scale equipment.
- Flow Vector Diagram Near the Tank Bottom
- Overall Flow in the Tank