The principle of the diving bell is well known, especially for the underwater works at small depth. It is based on the balance of air pressure with hydrostatic pressure at sea water level in the inferior part of the bell. The original idea is to use this principle for tightness of some parts of the underwater vehicles, for example electrical motors which actuate the pumps. This tightness named compensating tightness or contactless seal has many advantages: no friction on the shaft, in the case of sensitive regulator no water entry, the carcass can be built with light materials because there are no pressure loadings. The theoretical study of pressure compensation allows us to design the automatic balancing system. This study was validated by an experiment which demonstrates the possibility to use this principle for tightness of diverse components of the underwater apparatus, even for deep diving ones.
展开▼
