Pressure impacted cooling and lubrication unit
AssigneeKvaerner Eureka a.s.
InventorsKjell Olav Stinessen, Brede Thorkildsen
Life of this patent
Estimating the term…
Abstract
A device for cooling and lubricating a subsea device (1) which includes an electric rotary machine (4) and a fluid-rotation machine (6-8) drive-connected (5) thereto, which electric rotary machine (4) has a lubrication/cooling circuit includes a cooler (11) exposed towards the surrounding seawater, and where the fluid-rotation machine (6-8) has a fluid pressure at the end facing towards the electric rotary machine (4). The lubrication/cooling circuit (12, 11, 14) is pressure-impacted by the fluid pressure at one point (19, 20) in the lubrication/cooling circuit outside the fluid-rotation machine (6-8).
Claims14
A device for use with a subsea pump module (1) including a housing, a pump (6, 7) disposed in the housing and having a pump inlet (9) and a pump outlet (10), a pump shaft (6) with mechanical seals (27) and bearings (25, 26) for supporting the pump shaft (6) in the housing, an electric pump motor (4) arranged in the housing and having a motor shaft (3) drive-connected to the pump shaft, which pump module (1) has a motor pump (4) lubrication and cooling circuit (2, 11, 14) exposed to the surrounding seawater, and where the said pump inlet (9) is at the side of the pump that is adjacent to the pump motor (4), characterised in that the lubrication and cooling circuit (2, 11, 14) is pressure-impacted by the pump medium pressure in front of the pump inlet (9) via a separating means (21) pretensioned towards the pump motor, and that an impeller (27) is arranged on the pump shaft (6) in the end adjacent to the pump inlet (9).
A device for use with a subsea pump module (1) comprising:
- a housing;
- a pump (6, 7) disposed in the housing and having a pump inlet (9) and a pump outlet (10), a pump shaft (6) with mechanical seals (27) and bearings (25, 26) supporting the pump shaft (6) in the housing;
- an electric pump motor (4) arranged in the housing and having a motor shaft (3) drive-connected to the pump shaft;
- and
- a motor pump (4) lubrication and cooling circuit (2, 11, 14) exposed to the surrounding seawater, wherein,
- the pump inlet (9) is at the side of the pump that is adjacent to the pump motor (4),
- the lubrication and cooling circuit (2, 11, 14) is pressure-impacted by the pump medium pressure in front of the pump inlet (9) via a separating means (21) pretensioned towards the pump motor,
- an impeller (27) is arranged on the pump shaft (6) in the end adjacent to the pump inlet (9),
- the lubrication and cooling circuit is pressure-impacted by said fluid pressure via a weight load (63),
- the weight load is in the form of a liquid column (63), and
- the liquid column (63) is arranged between the upper and lower separating diaphragm means (62, 61).
A device for use with a subsea pump module (1), comprising:
- a housing;
- a pump (6, 7) disposed in the housing and having a pump inlet (9) and a pump outlet (10), a pump shaft (6) with mechanical seals (27) and bearings (25, 26) for supporting the pump shaft (6) in the housing;
- an electric pump motor (4) arranged in the housing and having a motor shaft (3) drive-connected to the pump shaft, which pump module (1) has a motor pump (4) lubrication and cooling circuit (2, 11, 14) exposed to the surrounding seawater, wherein,
- the pump inlet (9) is at the side of the pump that is adjacent to the pump motor (4),
- the lubrication and cooling circuit (2, 11, 14) is pressure-impacted by the pump medium pressure in front of the pump inlet (9) via a separating means (21) pretensioned towards the pump motor,
- an impeller (27) is arranged on the pump shaft (6) in the end adjacent to the pump inlet (9),
- the separating means is a separating diaphragm (21), and
- each individual separating diaphragm is associated with a level sensor (71, 72).
Dependencies are inferred from the claim text.