Abstract: A centrifugal hydraulic seal between the rotating and non-rotating components of rotating process equipment is provided. The centrifugal hydraulic seal reduces toxic gases inside an operating machine from escaping to the atmosphere or reduces gas from the atmosphere entering into the operating machine by the placement of protruding vanes on the face of the rotating seal wall on the low pressure side of the seal.

Abstract: An annular seal member comprising a seal body comprising a locating portion locatable against a wall element of an offshore structure, an inner surface, an outer surface and a lip portion that defines an open mouth of the seal member for receiving an elongate element therethrough; wherein the seal body is locatable against the wall element such that when a static pressure acting on the outer surface of the seal body exceeds a static pressure acting on the inner surface of the seal body a net positive pressure is exerted on the outer surface which at least partly deforms inwardly to provide a portion of the seal body for sealing against an outer surface of the elongate element. An offshore structure.

Abstract: A hydraulic seal arrangement including first and second rotatable components, the first defining a first annular trough defined by radially inwardly extending first and second walls, the second component defining a radially outwardly extending web between the walls. The first component includes a second trough defined by the second wall and a third wall axially spaced from the second, the second trough defining an open radially inner end defined by a radially inner end of the second wall such that the first and second annular troughs fluidly communicate around the circumference of the first component via the inner end of the second wall. At a first circumferential position, the second wall of the first component defines a second trough oil inlet providing further fluid communication between the first and second troughs and at a second circumferential position, the third wall of the first component defines a second trough oil outlet.

Abstract: A system includes a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid. The system also includes a motor system configured to power the hydraulic energy transfer system and a shaft coupling the motor system and the hydraulic energy transfer system. Additionally, the system includes a shaft seal disposed about the shaft. Further, the system includes a pressure compensator configured to reduce a pressure differential across the shaft seal.

Abstract: A hydraulic seal arrangement for a rotating machine, the hydraulic seal arrangement comprising: a hydraulic seal; and an annular reservoir (16) fluidly coupled to the hydraulic seal; wherein the annular reservoir (16) is arranged to retain fluid from the hydraulic seal when the machine is shutdown and to return the retained fluid to the hydraulic seal under centrifugal force after the machine is restarted.

Abstract: In a gear chamber 10, a sealing member 21 is attached to a rotary shaft 12 of an electric motor 11, and a grease return part 21a is provided on this sealing member 21. Thus, grease raked by a helical gear 12a is blown off diagonally forward with respect to a radial direction as a result of a centrifugal force, and it is possible to prevent the grease from leaking out of a ball bearing 20.

Abstract: A hydraulic seal is defined between a rotating member such as a turbocharger shaft and a stationary member such as part of a bearing housing of a turbocharger. The members define a projecting annular disc that is received in an annular channel that is filled with hydraulic sealing fluid such as oil. Rotation of the rotary member applies a centrifugal force to the fluid thereby ensuring that it is retained in the channel between walls thereof and the disc. This annulus of fluid provides a hydraulic seal around the shaft between the bearing housing and the compressor or turbine housing. The oil is delivered into the channel from a supply in the rotary member. One of the walls of the channel serves as a weir whereby when the channel has an excess supply of oil is overflows the wall and passes the drain.

Abstract: A hydraulic seal arrangement 5 between two shafts 1, 2 rotating relatively to each other, particularly in the same sense of rotation, of especially a gas turbine engine, where the radially outer shaft 2 has an annulus 5a extending radially outwards on its circumference into which the radially inner shaft 1 projects with a fin 5b that extends radially outwards on its circumference, said annulus 5a can be filled siphon-fashion through an inlet area 5d under centrifugal effect with a hydraulic fluid in the area of the free end of the fin 5b as the shaft(s) 1, 2 rotate(s), with an opening 7 branching off from an annulus area 5e for the discharge of hydraulic fluid, the annulus 5a being formed by a first outer shell part 8 and a second outer shell part 9 situated on the shaft 2.

Abstract: The invention concerns a device for a submersible machine, such as a pump, a turbine or a mixer. The machine includes a driving unit (1) and a hydraulic unit (2) having an impeller connected to the driving unit via a rotary shaft (3). In order to prevent the medium in the hydraulic unit from entering the driving unit along the driving shaft, an intermediate seal device is arranged. The seal device includes two mechanical face seals (5) and (6) and an intermediate room (7) containing barrier liquid. In order to prevent possible leaking barrier liquid from damaging the shaft bearing (4), a storage tank (9) for collecting said liquid is arranged within the room (7).

Abstract: A hydraulic seal (15) for providing a seal between two concentric shafts (10,12) of a gas turbine engine comprises a radially outer element (16) that defines an annular oil reservoir (21) and a radially inner element (22) having an annular fin (24) that projects into the oil reservoir (21). The radially inner seal element (22) is attached to its associated shaft (10) by frangible shear pins (26). In the event of relative axial movement between the shafts (10,12) the shear pins (26) break, thereby ensuring that such shaft relative axial movement is not unduly inhibited.