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| OF THE PREFERRED EMBODIMENT Reference is first made to FIG. 1, which shows a remote marine vessel ... |
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| Automated user notification system |
| The present invention provides an automated user notification system for monitoring user items and ... |
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| Method and system for marine vessel tracking system |
| What is claimed is: 1. A method of identifying marine ships undergoing suspicious activity in ... |
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| GPS navigation device |
| A navigation device for navigating a vehicle to a waypoint broadly comprises a GPS receiver for ... |
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| Use of an altitude sensor to augment availability of GPS location fixes |
| These needs are met by the invention, which combines a GPS with an altimeter or other location-... |
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| Enhanced position calculation |
| A first object of the invention is to overcome the problems of the prior art discussed above. The ... |
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| Handheld surveying device and method |
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| Navigation device and method for selectively displaying thoroughfare names |
| The present invention is a unique electronic navigation device, and method, for selectively ... |
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| Enhanced integrated positioning method and system thereof for vehicle |
| OF THE PREFERRED EMBODIMENTS The present invention is an enhanced integrated positioning method ... |
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| Method and apparatus of automatically monitoring aircraft altitude |
| An apparatus and method for automatically and independently determining aircraft altitude and ... |
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Tunnel thruster and water lubricated rotor duct assembly
| Details |
Inventors: Treaster, Allen L.; Beam, Michael J.; Schott, Carl G.; Brungart, Timothy A.;
Assignee: The Penn State Research Foundation (University Park, PA)
Primary Examiner: Swinehart; Ed
Assistant Examiner:
Attorney, Agent or Firm: Elnitski, Jr.; John J.
A tunnel thruster which is compact, quiet and can withstand the higher depth pressure encountered by a UUV. The UUV is usually a cylindrically shaped vessel and has a propulsor with control surfaces at one end. At two positions along the length of the body there are two cylindrical ports which pass through the body of the UUV. At each position one port is in the vertical plane while the other port is in the horizontal plane. These ports are four tunnel thrusters, which enable the maneuvering of the UUV. The tunnel thruster can be mounted in the ports of the UUV. The main components of the tunnel thruster includes a tunnel, motor assembly mounted in the tunnel, rotors on each end of the motor assembly and inlet ducts on each end of the tunnel. The tunnel thruster attempts to address the short comings of the commercial thrusters. The tunnel thruster is an all electrically powered thruster with all mechanical components contained within the tunnel. The rotors operate independently and are counter-rotating. Each rotor is directly driven by its own electric motor. The rotors are held in position by water lubricated fluid film journal and thrust bearings. The rotor duct assembly includes the rotor, inlet duct, bearing and seals, which can be used in other applications. |
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DETAILED DESCRIPTION A tunnel thruster for a water craft which includes the following.
A tunnel which fits into the water craft.
A water tight motor housing having two ends, whereby the motor housing mounted in the tunnel.
At least one strut attached between the tunnel and the motor housing to mount and secured the motor housing in the tunnel, where the at least one strut including a pathway for electric and instrumentation lines.
Two electric motors each including a drive shaft extending from an end of the motor, the motors mounted in an inline position along a centerline of the tunnel inside the motor housing, such that the drive shafts of the motors extend from each end of the motor housing along the centerline.
A water lubricated rotor duct assembly mounted on each end of the motor housing.
The rotor duct assembly includes the following.
A rotor attached to the drive shaft and about the motor housing, where the rotor having a main body which includes a front and a rear, and the front having a face.
At least two blades extending from the main body of the rotor between the front and the rear of the main body of the rotor.
A stabilizer shaft extending away from the motor housing, the stabilizer shaft extending from a center of the face of the front of the main body of the rotor, where the stabilizer shaft having a nose at an end of the stabilizer shaft which is forward of the face.
A cavity milled in the rear of the main body of the rotor to receive the drive shaft, at least part of the motor drive housing, bearings and seals, such that the main body of the rotor is mounted over the motor housing and internally connected to the nose of the drive shaft.
A rear seal assembly applying a seal against the drive shaft and against the cavity of the main body of the rotor.
A rear journal bearing providing a bearing surface between the cavity of the main body of the rotor and the motor drive housing, where the rear journal positioned near the rear of the main body of the rotor, the rear journal bearing lubricated by water surrounding the rotor duct assembly
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Navigation and GPS 
