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US 5,403,216 AGranted
Ship propulsion arrangement
AssigneeKvaerner Masa-Yards Oy
InventorsPekka Salmi, Erkki Ranki, Kari Laukia, Ulf Rosovist
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AssigneeKvaerner Masa-Yards Oy
InventorsPekka Salmi, Erkki Ranki, Kari Laukia, Ulf Rosovist
Estimating the term…
A main propulsion arrangement for a high power ship or the like comprises an underwater drive unit connected to and turnable by a substantially vertical tubular shaft journalled in the ship. The drive unit and the tubular shaft define a hollow casing enclosing an electrical propulsion motor connected to a propeller shaft, which is connected to a driving propeller external of the casing. The casing is, at its inside, supported by several mainly vertical web plates, which are arranged to act, in combination, as elements structurally stiffening and supporting the casing, as elements securing the propulsion motor in place relative to the casing, as elements transmitting to the casing reaction forces to the torque developed by the propulsion motor, and as wall elements of ducts for incoming and outgoing gaseous coolant for the propulsion motor.
A main propulsion arrangement for a high power movable floating structure, comprising a substantially vertical tubular shaft journalled in the floating structure, an underwater drive unit connected to the tubular shaft and turnable by means of the tubular shaft, the drive unit and the tubular shaft defining a hollow casing, an electrical propulsion motor in the hollow casing, a propeller shaft connected to the propulsion motor, and a driving propeller external of the casing and connected to the propeller shaft, and wherein the casing is, at its interior, supported by a plurality of substantially vertical web plates, which structurally stiffen and support the casing, secure the propulsion motor in place relative to the casing, transmit to the casing reaction forces to the torque developed by the propulsion motor, and define ducts for incoming and outgoing gaseous coolant for the propulsion motor.
A marine vessel comprising a hull and a main propulsion arrangement attached to the hull at a region thereof, said main propulsion arrangement comprising:
A main propulsion arrangement for a high power movable floating structure, comprising a substantially vertical tubular shaft journalled in the floating structure, an underwater drive unit connected to the tubular shaft and turnable by means of the tubular shaft, the drive unit and the tubular shaft defining a hollow casing, an electrical propulsion motor in the hollow casing, a propeller shaft connected to the propulsion motor, and a driving propeller external of the casing and connected to the propeller shaft, and wherein the casing is, at its interior, supported by five substantially vertical web plates, which are arranged substantially perpendicular to the propeller shaft, structurally stiffen and support the casing, secure the propulsion motor in place relative to the casing, transmit to the casing reaction forces to the torque developed by the propulsion motor, and define ducts for incoming and outgoing gaseous coolant for the propulsion motor.
Dependencies are inferred from the claim text.