CN1541892A

CN1541892A - Side-pushable towboat having two right-angle drive propulsion system equipped on bow and stern

Info

Publication number: CN1541892A
Application number: CNA2003101084576A
Authority: CN
Inventors: 捷马; 马捷; 戴斌
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2003-11-06
Filing date: 2003-11-06
Publication date: 2004-11-03
Anticipated expiration: 2023-11-06
Also published as: CN100345725C

Abstract

The pored hinge-type flapping wing for ornithopter includes frame with air ports and movable leaves on the air ports. When the flapping wing raises, the opened air ports make airflow to pass to reduce resistance on the flapping wing; and when the flapping wing swings downwards, the leaves closed air ports increase resistance on the flapping wing and the counterforce makes the fuselage raise. The present invention can rotate the wings in certain angle and/or alter the wing swing direction to make the ornithopter obtain forward or backward driving force while producing lift force, and can turn via regulating the frequency and amplitude of the two swinging wings.

Description

But the bow stern all is equipped with the thruster towboat of right angled drive propulsion system

Technical field

But the present invention relates to a kind of towboat of thruster operation, but particularly a kind of bow stern all is equipped with the thruster towboat of right angled drive propulsion system, belongs to the Marine engineering technical field.

Background technology

Known various towboats comprise seagoing tug at present, and coastal tug, river tug and berthing tug only have towing and two kinds of mode of operation of pushing tow.When other boats and ships require offshore, owing to the narrow gaps of its bow and water front, can not hold the length of towboat, make towboat can't carry out the pushing tow operation.Unique operating mode is to transfer to the outside of boats and ships with wirerope traction boats and ships bow.Too tall and big by tir, or the drag operation water surface is when narrow, and it is very complicated to receive the wirerope operation of jettisoninging, the drag operation difficulty.Ship side outside towing angle is spent and is easily caused by the tir lateral inclination suddenly even turn over and sink.In the harbour, the contact of all kinds of boats and ships is frequent, and frontage is obviously nervous, and large ship is very difficult by slipping from alongside and tune with self power, and the higher side direction that makes of center of gravity is pulled very easily unstability, all needs towboat to replace the towing traction with the pushing tow operation.Narrow when the water surface, had at interval in limited time by the bow of tow vessel and bank, towboat can not carry out the pushing tow operation.In the prior art, the patent No. is " towboat with horizontal propelling unit " patent of 96198742.1, at this towboat stern two propelling units are housed, bow is equipped with a propelling unit, but the propelling unit of bow does not have the side direction propulsion functions, towboat only has the advantage of flexible operation and fuel saving, does not possess the ability of thruster operation.Number of patent application is " but bow has the thruster towboat of the horizontal propelling unit of lifting mode " patent of 03151297.6, except that two universal propelling units are installed in the stern, it is that the horizontal propelling unit of lifting mode is installed in bow that a side direction propelling unit is arranged, make towboat have the thruster ability, can operation in general tonnage by tow vessel, when the thruster operation, two universal propelling units of stern are not worked fully, cause thruster power limited, the not competent thruster task for the treatment of that the tow vessel body weight is too huge.

Summary of the invention

For deficiency and the defective that overcomes prior art, design-calculated towboat of the present invention except the towing and pushing tow operational capability that possess existing towboat, also has the operation function of thruster.Specifically, this towboat inserts water surface gap between tall and big boats and ships bow and the bank with this towboat bow when carrying out tall and big boats and ships offshore or tune operation, makes tall and big safety of ship, leaves water front reposefully in the mode of side direction ejection.

The technical solution used in the present invention is: two right angled drive propulsion systems are housed.Wherein a right angled drive propulsion system is installed in stern, and another right angled drive propulsion system is installed in bow, makes towboat have the thruster operation function.From the top, on this two propelling units axis that is centered close to boats and ships separately.Treat the gap of offshore boats and ships bow to the bank for the ease of insertion, the bow front end of described towboat is an arc.Exert oneself simultaneously at two right angled drive propulsion systems of towboat bow stern and to carry out in the thruster operation, the side large tracts of land contact of this arc is guaranteed the leading edge contact boats and ships with slyness by the bow of towing boats and ships, and unlikely causing by the mechanical injuries of towing hull.

Right angled drive propulsion system can be around the vertical axis 360 degree revolutions of self, advance at towboat, fall back, vertically towing, forward during pushing tow, two right angled drive propulsion systems produce coaxial equidirectional thrust, when the thruster operation, two right angled drive propulsion systems produce disalignment and parallel, equidirectional thrust.When towboat was reversed end for end, two right angled drive propulsion systems produced disalignment and parallel, reciprocal thrust.

A kind of towboat provided by the invention, neither increase draft, do not increase advance resistance yet, only need to adopt two cover right angled drive propulsion systems, replace original universal propelling unit, just can finish the thruster operation of high thrust, can also on the water surface, turn to neatly and reverse end for end, even be the center of circle, be diameter, finish water surface circumnutation with self captain with self center, increased the alerting ability of its tune, had than remarkable economic efficiency.

Description of drawings

Fig. 1 is the schematic top plan view of towboat of the present invention.

Fig. 2 is the towboat of the present invention section drawing of axis of symmetry longitudinally.

Among the figure, 1 is first propelling unit, and 2 is second propelling units, the 3rd, the vertical axis of symmetry of towboat, the 4th, towboat forward terminal, the 5th, towboat aft terminal, the 6th, lateral center vertical plane surface, the 7th, stern, the 8th, bow, the 9th, towpoint, the 10th, hull bottom, C1 are the vertical axis of first propelling unit, C2 is the vertical axis of second propelling unit, and L is a towboat length, and L1 is the length of C1 to aft terminal, L2 is the length of C2 to aft terminal, and L3 is the length of towpoint to aft terminal.

The specific embodiment

Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.

As shown in Figure 1 and Figure 2, the horizontal direction of propulsion that propelling unit of the present invention comprises 2, two propelling units of first propelling unit, 1, the second propelling unit is perpendicular to separately axis C1, C2, and every propelling unit is all by driven by engine independently.Wherein first propelling unit 1 is placed in stern 7, the second propelling units 2 and is installed in towboat bow 10, and from the top, these two propelling unit central vertical axis C1, C2 are positioned on vertical axis of symmetry 3 in the projection of horizontal surface.Treat the gap of offshore boats and ships bow for the ease of insertion to the bank, the front end of towboat bow 4 is arcs, its edge is coated with the hard rubber liner, so that the relative angle of the horizontal thrust of towboat and boats and ships is less than 90 degree in the thruster operation, and the bow of boats and ships is pulled in the side large tracts of land contact that can make this arc, assurance is with the leading edge contact boats and ships of slyness, and unlikely causing by the mechanical injuries of towing hull.

First propelling unit 1 and second propelling unit 2 all adopt right angle propelling unit (or being called Z type propelling unit), this propelling unit can be around the vertical axis 360 degree revolutions of self, in advancing, this propelling unit can produce thrust backward, first, second propelling unit collaborative work makes towboat be easy to handle.

Forward terminal 4 and aft terminal 5 lay respectively at the front and back end place of vertical axis of symmetry 3 principal planes, and lateral center vertical plane surface 6 was the mid point of distance and perpendicular to the vertical plane of axis of symmetry 3 between the end points 4 and 5 before and after the towboat.The part that the hull of towboat is in 6 back, lateral center plane is a stern 7, is in lateral center plane 6 fwds and partly is bow 8.Towpoint 9 is arranged on the deck of stern 7.The length L of towboat is the horizontal throw between forward terminal 4 and the aft terminal 5.L1 is between 0.15L-0.35L, and L2 is less than or equal to 0.9L, and more than or equal to 0.8L, the length of L3 is less than 0.15L.

The set horizontal propelling unit of the present invention is the principal plane that is arranged in vertical axis of symmetry 3, two propelling unit associated working, this just can realize following advantage: when the bow of towboat insert treat that offshore boats and ships bow is in the gap of harbour after, laterally propelling

unit

1,2 is started working, the thrust that it produces and the principal plane of towboat axis of symmetry 3 are perpendicular, act on the bow for the treatment of the offshore boats and ships, make it to cast off wharf gradually, increased the interval of boats and ships and harbour, for the pushing tow operation of towboat creates conditions.Such result, be avoided operating complicated, be easy to the closely drag operation that causes that the large ship side direction turns over and sinks.

Claims

1. but a bow stern all is equipped with the thruster towboat of right angled drive propulsion system, mainly comprise first propelling unit (1) that is installed in stern and second propelling unit (2) that is installed in bow, the horizontal direction of propulsion that it is characterized in that two propelling units is perpendicular to separately vertical axis (C1), (C2), every propelling unit is all by driven by engine independently, from the top, on these two propelling units axis that is centered close to boats and ships (3) separately.

2. but bow stern according to claim 1 all is equipped with the thruster towboat of right angled drive propulsion system, and its feature is also that first propelling unit (1) and second propelling unit (2) all adopt can be around the rotating right angled drive propulsion system of vertical axis 360 degree of self.