Contact dynamic sealing structure suitable for oil way between rotating part and static part

The invention provides a contact dynamic sealing structure suitable for an oil way between a rotating piece and a static piece, the contact dynamic sealing structure comprises the static piece 1, the rotating piece 4, a first O-shaped sealing ring 2, a first protection ring 6, a second O-shaped sealing ring 3 and a second protection ring 5, the rotating part 4 is of a tubular structure, the opening side of the static part 1 is inserted into an inner hole of the rotating part 4, an oil way between the rotating part 4 and the static part 1 is connected through a circumferential oil groove, sealing ring grooves are formed in the two sides of the oil groove of the static part 1, a first O-shaped sealing ring 2 is arranged in one sealing ring groove, and a first protection ring 6 is arranged on the outer side of the first O-shaped sealing ring 2. A second O-shaped sealing ring 3 is arranged in the other sealing ring groove, and a second protection ring 5 is arranged on the outer side of the second O-shaped sealing