Dynamic sealing device

A dynamic sealing device (10, 20, 30) configured to provide sealing between at least a first part and at least a second part having a relative rotational movement in relation to the first part, the dynamic sealing device being formed by a seal (11, 21, 31) comprising:

• a body portion (14, 24A, 24B, 34);
• a first main lip (12, 23A, 32) extending from the body portion;
• a second main lip (13, 23B, 33) extending from the body portion, the first lip facing the second lip;
• the first and second lips being configured to be energized by a first fluid so as to seal at least one of the first part and second part;
• at least one additional lip (15, 25A, 25B, 35) located on the body portion remotely from the first and second lips, the at least one additional lip (15, 25A, 25B, 35) being configured to be energized by a second fluid pressing against the at least one additional lip (15, 25A, 25B, 35) so as to seal the at least one additional lip (15, 25A, 25B, 35) against at least the other of the first part and second part at a location of the body portion,
• wherein the at least one additional lip (15, 25A, 25B, 35) is configured so that with the second fluid pressing the at least one additional lip (15, 25A, 25B, 35) against the at least the other of the first part and second part at the location of the body portion, both the body portion and the at least one additional lip are in contact with a same surface of the other of the first part and second part to be sealed, the body portion and the at least one additional lip (15, 25A, 25B, 35) together providing a sealing function against the same surface of the other of the first part and second part.