A pressure-bearing seal structure of the underwater sensor is designed

involving pressure-bearing capacity of shell of sensor as well as the design of the whole mechanical seal structure. A cylindrical pressure shell which is established based on theoretical pressure calculation

can withstand the pressure up to 10 MPa and is realized by the hydrostatic pressure seal with the O-type seal rubber ring. Under the premise of guaranteeing the test requirements

this structure has advantages of both being removable and easy to be replaced compared with the existing vulcanized seal ones.