Shaft/Bearing/Seal

Rotor Dynamics

To safely operate pumps that run at high speed, the dynamics of pump elements that affect shaft stability(shaft seal, bearing, impeller, etc.) and the fluid force on each element must be correctly understood. Ebara uses unique rotor dynamics test stands based on magnetic bearing technology to measure fluid forces on shaft seals, bearings, and impellers in different shaft vibration modes that can occur during high-speed pump operation. This technology has also been used to evaluate the rotational stability of JAXA’s rocket pumps.

Injection Pumps

As carbon capture and storage (CCS) is gaining increasing attention as a measure against global warming, there are high expectations for injection pumps to inject liquefied carbon dioxide into the ground. Bearings for safe and stable pump operation under high-pressure conditions and seal technology to prevent external leakage of acid gas are also important.