Wear of end ring is to date an unreported and uninvestigated failure that very frequently takes place in deep-well submersible motor pumps. This article first analyses the particularities these induction motors, especially their unusual rotor manufacturing process. Failure mechanism related end-ring wear described, showing several examples damaged rotors a repair shop. Then, difficulties its di...

The article is devoted to the investigation of causes failures in centrifugal submersible electric pumping units (CSEP) during work process, measures taken eliminate failures, improve performance and increase time between repairs. In order CSEP, a number changes were made design. Keywords: unit, guidance apparatus, impeller, support ring, friction.

Submersible mixer is the core machinery of sewage treatment, which has a profound effect on efficiency and performance submersible mixing system treatment. This paper summarizes scientific research results in recent years from four aspects: structure energy characteristics mixer, numerical simulation calculation method, flow field characteristics, factors affecting characteristics. The existing...

BACKGROUND The water entry of a submersible aircraft, which is transient, highly coupled, and nonlinear, is complicated. After analyzing the mechanics of this process, the change rate of every variable is considered. A dynamic model is build and employed to study vehicle attitude and overturn phenomenon during water entry. Experiments are carried out and a method to organize experiment data is ...