公开(公告)号：US20230002024A1

公开(公告)日：2023-01-05

申请号：US17810712

申请日：2022-07-05

Applicant: ABB Oy

Inventor： Tuomas Kekki ,  Petri Pellinen ,  Sakari Siipilehto ,  Tuomas Herranen ,  Antti Tuppurainen

IPC: B63H21/38 ,  B63H23/32 ,  B63H23/34 ,  F16H57/04

Abstract: A propulsion unit (1) for a marine vessel, comprising a shell structure (2), a shaft (4) rotatably coupled to a propulsion motor (3) inside the shell structure (2), and a propeller (5) coupled to the shaft (4) outside the shell structure (2). A shaft seal arrangement (6) is provided to engage the shaft (4), such that at least a first seal chamber (6a) is delimited between adjacent seal lips (6′) and the shaft (4). A first lubrication arrangement is provided for circulating a first lubricant through the first seal chamber (6a). The first lubrication arrangement (7) further comprises a first lubricant heat exchanger (7e) arranged at least partly outside of the shell structure (2) for conducting the first lubricant therethrough and for transferring heat from the first lubricant to an outside environment of the shell structure (2). A propulsion unit for a marine vessel, including a shell structure, a shaft rotatably coupled to a propulsion motor inside the shell structure, and a propeller coupled to the shaft outside the shell structure. A shaft seal arrangement is provided to engage the shaft, such that at least a first seal chamber is delimited between adjacent seal lips and the shaft. A first lubrication arrangement is provided for circulating a first lubricant through the first seal chamber. The first lubrication arrangement further includes a first lubricant heat exchanger arranged at least partly outside of the shell structure for conducting the first lubricant therethrough and for transferring heat from the first lubricant to an outside environment of the shell structure.

公开(公告)号：US20230119447A1

公开(公告)日：2023-04-20

申请号：US18047573

申请日：2022-10-18

Applicant: ABB Oy

Inventor： Tuomas Kekki ,  Petri Pellinen ,  Aulis Ollikainen

IPC: B63H23/32 ,  F16N7/40 ,  F16N21/00 ,  F16N23/00 ,  F16J15/324

Abstract: An arrangement and a method for sealing a propeller shaft of a marine vessel. The arrangement including a shaft seal arrangement and a lubrication arrangement including a lubricant circulation line for conducting lubricant to and from the shaft seal arrangement and a lubricant circulator. The lubricant circulation line includes a connection line that is connected in fluid connection with the lubricant circulation line downstream of the lubricant circulator and upstream of the shaft seal arrangement, and that is connected in fluid connection with a second part of the lubricant circulation line so as to selectively conduct a part of the flow of lubricant past the shaft seal arrangement. At least one hydraulically operated pressure relief means is configured to control the flow of lubricant in the connection line.