SHAFT SEAL Russian patent published in 2015 - IPC B63H23/34 F16J15/34 F16C3/00 

FIELD: machine building.

SUBSTANCE: shaft seal contains basic seal, power elastic element with sealing ring element interacting with counter sealing element and creating with it end face sealing assembly and emergency end face seal. The power elastic element is in form of the metal membrane fixed and tightly secured along the outside contour with located on its internal shaft encircling contour counter sealing ring element rigidly secured on the shaft and creating with it the parking loaded by external force seal of increased heat-resistance. The shaft seal additionally contains the remotely controlled drive of parking end seal opening, and emergency end seal is made as normally opened and contains heat-resistant interacting ring sealing elements on the end face of the shaft input hole and adjacent end wall of the shaft. The shaft is made with possibility of its movement along the axis and is equipped with thrust, accepting the external force bearing with its emergency securing against longitudinal displacement.

EFFECT: increased reliability and stability of the shaft seal by its design improvement, including due to use of the interacting sealing elements out of heat resistant materials, and improved repairability.

1 dwg