FI921970A - Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers - Google Patents

Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers Download PDF

Info

Publication number
FI921970A
FI921970A FI921970A FI921970A FI921970A FI 921970 A FI921970 A FI 921970A FI 921970 A FI921970 A FI 921970A FI 921970 A FI921970 A FI 921970A FI 921970 A FI921970 A FI 921970A
Authority
FI
Finland
Prior art keywords
shroud
propellers
shaft assembly
upstream
downstream
Prior art date
Application number
FI921970A
Other languages
Finnish (fi)
Other versions
FI921970A0 (en
FI109679B (en
Inventor
Luciano Veronesi
Raymond Mark Calfo
James Albert Drake
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to FI921970A priority Critical patent/FI109679B/en
Publication of FI921970A0 publication Critical patent/FI921970A0/en
Publication of FI921970A publication Critical patent/FI921970A/en
Application granted granted Critical
Publication of FI109679B publication Critical patent/FI109679B/en

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The high-thrust, shock-resistant submersible propulsor unit comprises of a shroud having a water inlet and a water outlet, a shaft assembly centrally mounted within the shroud, and an upstream and a downstream propeller, each of which includes a separate hub rotatably mounted on the shaft assembly, first and second electric motors for independently rotating the upstream and the downstream propellers. Each motor includes a rotor mounted around the outer periphery of one of the propellers, and a stator mounted on the shroud around the rotor, and first and second bearing assemblies, each of which includes a thrust bearing disposed within the hubs of the upstream and downstream propellers in the shaft assembly. The thrust bearings associated with the first and second bearing assemblies are located on opposite ends of the shaft assembly. Each of the bearing assemblies includes a removable cover which affords easy and separate access to the bearing contained in each. The pitch of the upstream and downstream propellers is different so that they may be counter-rotated to produce torque free thrust. In the preferred mode of operation, the propellers are rotated at different speeds such that the upstream propeller supercharges the downstream propeller.
FI921970A 1992-04-30 1992-04-30 Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers FI109679B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI921970A FI109679B (en) 1992-04-30 1992-04-30 Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI921970 1992-04-30
FI921970A FI109679B (en) 1992-04-30 1992-04-30 Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers

Publications (3)

Publication Number Publication Date
FI921970A0 FI921970A0 (en) 1992-04-30
FI921970A true FI921970A (en) 1993-10-31
FI109679B FI109679B (en) 2002-09-30

Family

ID=8535205

Family Applications (1)

Application Number Title Priority Date Filing Date
FI921970A FI109679B (en) 1992-04-30 1992-04-30 Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers

Country Status (1)

Country Link
FI (1) FI109679B (en)

Also Published As

Publication number Publication date
FI921970A0 (en) 1992-04-30
FI109679B (en) 2002-09-30

Similar Documents

Publication Publication Date Title
US5185545A (en) Dual propeller shock resistant submersible propulsor unit
CA2137607C (en) Waterjet propulsor powered by an integral canned electric motor
US2509442A (en) Inverse rotor
US5078628A (en) Marine propulsor
US3112610A (en) Constant pressure shrouded propeller
US2714866A (en) Device for propelling a ship
US20080089786A1 (en) Counter-Rotating Integrated Propeller Assembly
EP0169682A2 (en) Fluid machine
US3405526A (en) Multiple stage, hydraulic jet propulsion apparatus for water craft
EP2432683B1 (en) Support of propeller unit for a vessel
US2652505A (en) Inverse rotor
JPH0698951B2 (en) A unit having a ship propulsion unit screw and a guide impeller installed after the unit.
US6435120B2 (en) Thruster
FI921970A (en) Dual propeller shock resistant submersible propulsion unit - comprises shroud having water inlet and water outlet, shaft assembly centrally mounted within shroud, and up and down-stream propellers
RU2119875C1 (en) Shipboard propeller-engine plant, type swivel column
KR930021494A (en) Impact resistant underwater propulsion system with double propeller
RU2136539C1 (en) Hydrodynamic propulsor
Holt et al. High efficiency, counter-rotating ring thruster for underwater vehicles
RU184128U1 (en) Biirotative electromotive steering column
US5509830A (en) Marine propulsor cooling and lubricating system
GB2160618A (en) Ship's propeller arrangement
JPH06263092A (en) Electric driving device for contra-rotating propeller
SU1766780A1 (en) Electrical driver-propeller unit
SU1766608A1 (en) Withdrawal of casting
KR930021497A (en) Marine propulsion unit with integrally formed motor