CN205440823U - To changeing oar front and back oar propeller hub connection structure - Google Patents

Abstract

The utility model relates to a to changeing oar front and back oar propeller hub connection structure, including the coaxial preceding oar that sets up, back oar, preceding oar is driven by the motor nacelle of its afterbody by inside gas turbine or the motor drive of hull, back oar, preceding oar includes preceding oar paddle, preceding oar propeller hub, preceding oar spinner, back oar is including back oar propeller hub, back oar paddle, the cross section of back oar propeller hub, preceding oar spinner, preceding oar propeller hub is circularly, back oar propeller hub is one section coherent sine curve section with the generating line of preceding oar spinner, the diameter of oar spinner before wherein oar propeller hub diameter in back is greater than, the tangent line that sine curve section curve was held from beginning to end is parallel with the axis of screw, when the main engine operation of oar before the drive, before preceding oar propeller hub drives the oar paddle before and the oar spinner rotate, preceding oar paddle produces thrust, releases rotatory wake flow simultaneously backward, oar spinner flow direction back oar propeller hub before the laminating flows in near preceding oar propeller hub, the motor during operation of drive back oar, the rotatory wake flow of oar before back oar paddle rotates and retrieves to the recovered energy, smooth -going the flowing through of incoming flow of preceding oar spinner.

Description

To turning oar propeller hub attachment structure before and after oar

Technical field

This utility model relates to a kind of to turning oar propeller hub attachment structure before and after oar, belongs to Ship Design Technology field.

Background technology

The pattern of co-axial contra rotating propeller has multiple, and wherein for the propeller that front and back's oar independently drives, bow oar is generally driven front propeller to rotate by gas turbine (or motor) the band moving axis of hull interior；Rear oar generally uses podded electric propulsion pattern.From the angle of energy-saving principle, after mainly using the pattern turning oar, oar inverts with bow oar, thus reclaims the energy in bow oar trailing vortex, reaches energy-conservation effect.But, existing the most abundant to the consideration of hub eddyloss to turning paddle type formula, propeller hub spinner linking pattern is not the most through optimizing design, the conventional bow oar propeller hub to turning oar uses the shape of round platform, holds at ship's head greatly, small end direction on the quarter, substantial amounts of whirlpool can be produced, in turn result in the loss of energy, it is impossible to give full play to the effect energy-conservation to turning oar, inconsistent with to the design original intention turning oar.

Utility model content

This utility model technical issues that need to address are: existing the most abundant to the consideration of hub eddyloss to turning paddle type formula, propeller hub spinner linking pattern is not the most through optimizing design, substantial amounts of whirlpool can be produced, in turn result in the loss of energy, it is impossible to give full play to the effect energy-conservation to turning oar.

This utility model takes techniques below scheme:

A kind of to turning oar propeller hub attachment structure before and after oar, including bow oar, the rear oar of coaxial setting；Bow oar is driven by gas turbine or the motor of hull interior, and rear oar is driven by the motor gondola 3 of its afterbody；Described bow oar includes bow oar blade 1, bow oar propeller hub 2, bow oar spinner 4；Described rear oar includes rear oar propeller hub 5, rear oar blade 6；Described rear oar propeller hub 5, bow oar spinner 4, the cross section of bow oar propeller hub 2 are circle；Rear oar propeller hub 5 is one section of coherent sinusoidal segments 7 with the bus of bow oar spinner 4, and wherein rear oar propeller hub 5 diameter is more than the diameter of bow oar spinner 4；The tangent line of sinusoidal segments 7 curve two ends is parallel with the axis 8 of propeller；When driving the host work of bow oar, bow oar propeller hub 2 drives bow oar blade 1 and bow oar spinner 4 to rotate, and bow oar blade 1 produces thrust, releases the most backward and rotates wake flow, and bow oar propeller hub 2 flows about oar propeller hub 5 after laminating bow oar spinner 4 flows to；After driving during the electric motor operation of oar, rear oar blade 6 rotates and reclaims bow oar and rotate wake flow, thus recovers energy, bow oar spinner 4 carry out levelling following current, do not produce too much dissipation of vorticity.

The technical program provides a set of design type to turning oar bow oar spinner and rear oar propeller hub form fit, it is preferred that emphasis is the reasonability of its hydrodynamic performance, such that it is able to reach energy-conservation purpose.

Further, described bow oar propeller hub 2 is in cylinder, and its diameter is identical with the front end of described bow oar spinner 4, both smooth docking.

Further, described bow oar blade 1 is integral type structure with bow oar propeller hub 2.

Further, if a diameter of D of bow oar, excessive by the face blend fairing that radius is 0.4%D at the terminal edge of bow oar spinner 4；It is excessive that the face blend that front edge employing radius is 1.2%D at rear oar propeller hub 5 carrys out fairing；Gap between bow oar spinner 4 and rear oar propeller hub 5 is 1%D.

Further, the shape for sinusoidal segments 7 determines that distance L between radius r and the two end face of the radius R by motor gondola 3 ship's head end and bow oar propeller hub 2 stern direction end determines jointly；In XOY coordinate system, initial point O is positioned at the home position of motor gondola 3 ship's head end face circle, and X-axis positive direction points to bow, and vertically upward, then sinusoidal segments 7 shape is expressed as Y-axis positive direction: $y=\frac{R+r}{2}+\frac{R-r}{2}\sin (\frac{\mathrm{\π}x}{L}+\frac{\mathrm{\π}}{2}).$

The beneficial effects of the utility model are:

1) take into full account turning paddle type formula to hub eddyloss, propeller hub spinner linking pattern is optimized design, it is to avoid produce substantial amounts of whirlpool, thus avoid the loss of energy, play more preferable energy-saving effect.

2) bow oar propeller hub is designed to cylinder, breaks the conventional design of traditional round table-like design type.

3) oar propeller hub external diameter, more than bow oar propeller hub, is held rear greatly, has also been broken the prior art preceding conventional design of big end afterwards.

4) sinusoidal segments bus is well-designed, and by the selected optimal sine curve line style of substantial amounts of simulation and test, the edge that rear oar propeller hub and bow oar spinner are corresponding carries out the circular arc chamfering design of certain radius simultaneously, and effect of optimization is more.

5) leave specific gap afterwards between oar propeller hub and bow oar spinner, take into account the safety in design and operational efficiency.

Accompanying drawing explanation

Fig. 1 is this utility model to turning the schematic perspective view of oar propeller hub attachment structure before and after oar.Structure division owing to expressing emphatically needed for this utility model relates to the line style of smooth excessiveness, and pure line frame graph is difficult to clearly express, and therefore Fig. 1 uses sharply marginated design sketch to express.

Fig. 2 is the line frame graph corresponding with Fig. 1.

Fig. 3 is this utility model to turning the front view of oar propeller hub attachment structure before and after oar.

In figure, 1 bow oar blade；2 bow oar propeller hubs；3 gondolas (include motor)；4 bow oar spinners；Oar propeller hub after 5；Oar blade after 6；7 design curves；Oar axis before and after 8.

Detailed description of the invention

With specific embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

See Fig. 1-Fig. 3, a kind of propeller hub being applicable to co-axial contra rotating propeller system and spinner linked vector graph.This design is applied on bow oar propeller hub, bow oar spinner and rear oar propeller hub, by cooperating between shape, reaches energy-conservation purpose.

This structural shape is mainly by unconventional bow oar propeller hub size, special shape bow oar spinner, and coordinates the rear oar propeller hub shape of bow oar wake flow to collectively form.Its structural relation is as follows:

As shown in accompanying drawing 1-Fig. 3, bow oar is made up of 1,2,4 three parts；Rear oar is made up of 5,6 two parts, and then oar is driven by the motor M in 3；Oar coaxial line front and back, 8 represent this axis；7 have marked one section of sine curve, and this sine curve is core of the present utility model, and whether energy-conservation the current that its shape design determines propeller hub near zone are.

The conventional bow oar propeller hub to turning oar uses the shape of round platform, holds at ship's head greatly, small end direction on the quarter, the design innovates the cylindrical propeller hub 2 of employing, compared to the preceding situation of big end, the most energy-conservation, hold posterior situation to have bigger intensity and reasonably weight distribution relative to big；Bow oar blade 1 and propeller hub 2 one, bow oar spinner 4 is installed on one end, stern direction of bow oar propeller hub 2, and its ship's head end diameter is equal with bow oar hub diameter, and its side coincides with curve 7 and rotates the curved surface formed around oar axis 8；At the terminal edge of spinner 4 by face blend fairing that radius is 0.4%D excessively (D represents bow oar diameter, lower with)；After motor M in gondola 3 drives, oar propeller hub 5 rotates together with rear oar blade 6, and the side of rear oar propeller hub 5 coincides with curve 7 equally and rotates the curved surface formed around oar axis 8, and it is excessive that the face blend that its ship's head end uses radius to be 1.2%D carrys out fairing；Guarantee that the gap between bow oar spinner 4 and rear oar propeller hub 5 is 1%D.

The shape of sinusoidal segments 7 is determined and is mainly jointly determined by distance L between the radius R of gondola 3 ship's head end and radius r and the two end face of bow oar propeller hub 2 stern direction end.In XOY coordinate system, initial point O is positioned at the home position of gondola 3 ship's head end face circle, and X-axis positive direction points to bow, and vertically upward, then its shape can be expressed as Y-axis positive direction:

$y=\frac{R+r}{2}+\frac{R-r}{2}sin(\frac{\mathrm{\π}x}{L}+\frac{\mathrm{\π}}{2})$

Sine curve smooths fairing, a upper crest rises and falls gently during nearest trough, thus it being not result in too much energy loss, the tangent line of the curve two ends excessive fairing that ensure with front-end geometry thing parallel with the axis 8 of propeller simultaneously, as shown in accompanying drawing 1,3.

This utility model is the design of given shape, after Practical is installed, and the works driven by main frame or generator rotation, it is not necessary to operate especially.

When driving the host work of bow oar, bow oar propeller hub drives blade and spinner to rotate, and blade produces thrust, releases the most backward and rotates wake flow, and bow oar propeller hub flows about oar propeller hub after laminating bow oar spinner flows to；After driving during the electric motor operation of oar, rear oar rotates and reclaims bow oar and rotate wake flow, thus recovers energy, bow oar spinner carry out levelling following current, do not produce too much dissipation of vorticity.

Claims (5)

1. one kind to turning oar propeller hub attachment structure before and after oar, it is characterised in that:

Bow oar, rear oar including coaxial setting；Bow oar is driven by gas turbine or the motor of hull interior, and rear oar is driven by the motor gondola (3) of its afterbody；

Described bow oar includes bow oar blade (1), bow oar propeller hub (2), bow oar spinner (4)；Described rear oar includes rear oar propeller hub (5), rear oar blade (6)；

Described rear oar propeller hub (5), bow oar spinner (4), the cross section of bow oar propeller hub (2) are circle；

Rear oar propeller hub (5) is one section of coherent sinusoidal segments (7) with the bus of bow oar spinner (4), and wherein rear oar propeller hub (5) diameter is more than the diameter of bow oar spinner (4)；

The tangent line of sinusoidal segments (7) curve two ends is parallel with the axis of propeller (8)；

When driving the host work of bow oar, bow oar propeller hub (2) drives bow oar blade (1) and bow oar spinner (4) to rotate, bow oar blade (1) produces thrust, releasing the most backward and rotate wake flow, bow oar propeller hub (2) flows about oar propeller hub (5) after laminating bow oar spinner (4) flows to；After driving during the electric motor operation of oar, rear oar blade (6) rotates reclaims bow oar and rotates wake flow, thus recovers energy, bow oar spinner (4) carry out levelling following current, do not produce too much dissipation of vorticity.

2. as claimed in claim 1 to turning oar propeller hub attachment structure before and after oar, it is characterised in that: described bow oar propeller hub (2) is in cylinder, and its diameter is identical with the front end of described bow oar spinner (4), and both are smooth docks.

3. as claimed in claim 1 to turning oar propeller hub attachment structure before and after oar, it is characterised in that: described bow oar blade (1) and bow oar propeller hub (2) they are integral type structure.

4. as claimed in claim 1 to turning oar propeller hub attachment structure before and after oar, it is characterised in that: set a diameter of D of bow oar, excessive by the face blend fairing that radius is 0.4%D at the terminal edge of bow oar spinner (4)；It is excessive that the face blend that front edge employing radius is 1.2%D rear oar propeller hub (5) carrys out fairing；Gap between bow oar spinner (4) and rear oar propeller hub (5) is 1%D.

5. as claimed in claim 1 to turning oar propeller hub attachment structure before and after oar, it is characterised in that:

The shape of sinusoidal segments (7) is determined to distance L between radius r and the two end face of the radius R by motor gondola (3) ship's head end and bow oar propeller hub (2) stern direction end determines jointly；In XOY coordinate system, initial point O is positioned at the home position of motor gondola (3) ship's head end face circle, and X-axis positive direction points to bow, and vertically upward, then sinusoidal segments (7) shape is expressed as Y-axis positive direction:。