The two floating rings rely on the deformation of the O-ring after axial compression to generate a clamping force on the sealing end face of the floating ring. With the uniform wear of the sealing end face, the elastic energy stored by the O-ring is gradually released, thereby playing an axial compensation role. The sealing surface can maintain a good fit within the set time, and the general sealing life is more than 4000 hours.

A type of non-contact seal. The structural of duo cone features and sealing principle are shown in the figure:
There is a particular gap between the floating ring and the rotating shaft. It can float freely but cannot rotate with the rotating shaft. It can only slide and float radially and maintain a certain eccentricity with the center of the shaft under the action of gravity. When the dual cone seal, the sealing liquid (usually oil) is input from outside the floating oil seal to form an oil film in the gap between the rotating shaft and the floating ring.

Due to the action of the oil wedge power generated when the shaft rotates, a certain oil film pressure is maintained in the oil film so that the floating ring can automatically maintain “centering” with the center of the shaft, thereby significantly reducing the gap and seal gp duo cone effectively realizing the sealing of fluid medium leakage.