CN2036933U

CN2036933U - Rotary barrel type variable pitch propeller

Info

Publication number: CN2036933U
Application number: CN 87216675
Authority: CN
Inventors: 叶英俊
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-15
Filing date: 1987-12-15
Publication date: 1989-05-03

Abstract

The utility model relates to a propeller which is used for a ship and an airplane, particularly a propeller used for a submarine, a tugboat and a fishing boat for propelling. The utility model is characterized in that a rotary barrel (1) and a propeller blade (2) are integral, a water inlet of the rotary barrel (1) is provided with an inner R arc, and a water outlet of the rotary barrel (1) is provided with an outer R arc. The utility model is a propeller which is used for propelling and has the advantages of speed increasing capability, energy saving, no cavitation corrosion, low noise, micro vibration, and high strength.

Description

Rotary barrel type variable pitch propeller

The utility model is a kind of naval vessel, aircraft propulsion screw propeller.Especially for the propelling screw propeller on Submarine, towboat, the fishing boat.

Present widely used marine propeller all relies on single blade to push away water ship is advanced.And the local variable pitch of constant pitch or blade root, propulsion coefficient is low, vacuolus denudation is serious, vibration and noise is big, strength and stiffness are low.French Patent (FRP) FR2562865, European patent EP 164279 has only spinning ball or rotary tube by the precession power that wind produces ship to be moved.Do not have blading.Japanese Patent JP61-37595 and JP61-50894 water spray screw propeller and shrouded propeller common feature are that blade and conduit are allosome, and conduit is all fixed with hull.The utility model adopts blade and conduit to rotate simultaneously, multidirectional variable pitch, and maximum blade thickness leans on the lagging edge place at golden section, reduce vacuolus denudation, eliminate slightly the whirlpool, reduce float outward, kick concentrates, towing tension increases, and has eliminated surperficial pulsating water pressure, makes hull not be subjected to the evil of its vibration.Noise reduces significantly.

The purpose of this utility model is to provide a kind of can increase the speed of a ship or plane, save the propelling screw propeller of the energy, no vacuolus denudation, low noise, little vibration, high strength and high rigidity.

The utility model is achieved in that its core is that the existing fixed conduit is changed over the screw propeller that rotates together with blade.The maximum ga(u)ge of blade section is at the nearly lagging edge of golden section place, and the pitch variation characteristics on the entire blade are second-class three changes.A constant pitch line promptly directly, is circumferentially respectively arranged, divide recessed change and protruding change and radially change as coordinate.At first adopt " extraordinary screw propeller founding scraper plate " device to scrape acting face, go up the standard blade thickness, put the tube wall core rod, form the inner chamber of casting usefulness.Water riser oar routinely calculates, designs.Get final product a cast molding.The utility model comprise blade 2. propeller hub (12) spinner 3. stern tube shaft 4. and revolve the tube 2. be one 1. with blade.Revolve the tube 1. water inlet interior R arc is arranged, water outlet has outer R arc.Revolve the maximum width that tube length 1. equals blade.Blade 2. maximum ga(u)ge is placed on the nearly lagging edge of golden section place.Its blade acting face is second-class three variable pitchs.

Advantage of the present invention: do not have the blade waste of power in whirlpool slightly, rush at the planking cavity 5. and the surperficial leaf frequency and the component disappearance frequently of times leaf of non-cavity, hull is not subjected to the evil of its resonance, and outer drift angle is little, kick is concentrated, and gives newspaper than existing oar towing tension and can increase more than 35%; Reduced the outstanding product resistance of A/C; Second-class three pitch Changing Patterns that become and maximum blade thickness are at the nearly lagging edge of golden section place, and vacuolus denudation reduces to make propulsion coefficient improve simultaneously; Because blade portion slightly 2. fixes with the garden tube, make the increase of blade rigidity and intensity, so the suitable thickness of attenuate leaf; Can alleviate the infringement of over-water floats and hawser to blade.Especially be fit to navigation in ice region; This oar and the efficient combined rudder adapted of band rectification cap and on the sternpost above the stern tube shaft peace 3-4 layer dovetail type current plate 10. oar imitate and also will increase; Give the newspaper propulsion coefficient and can improve more than 10%, its main characteristics that vibration is light, noise is low, cavitation corrosion is few, fuel-economizing is it.

1. revolve 2. 3. 4. 5. 6. 7. 9. 10. fluid stopping plate (12) propeller hub under dovetail type current plate (11) rudder of dovetail of the 8. efficient combined rudder of rectification cap of fluid stopping plate on the rudder of hull of stern tube shaft of spinner of blade of tube in the utility model accompanying drawing institute diagrammatic sketch one.

Most preferred embodiment:

N=1500 rev/min of propeller speed N=500 rev/min of diameter of propeller D=600 name of 22 horsepowers of fishing boat main frame HP=22 horsepower of the typical case pitch H=605 number of sheets Z=4 casterangle ε=0 ° of wide b0.6R=121 shaft centre line of disk ratio A/Ad=0.41 boss diameter ratio d/D=0.16 leaf blade maximum ga(u)ge t of place ₀The thick slightly t of=27 leaves ₁₀=3 revolve the thick δ of barrel=4.5 revolves tube length L=120 dextrorotation rectification cap maximum outside diameter φ=115

Claims

1, a kind of comprise blade 2. propeller hub (12) spinner 3. the cylinder-rotating variable pitch screw 4. formed of stern tube shaft it is characterized in that:

A) revolving tube 2. 1. is an integral body with blade;

B) revolve the tube 1. water inlet interior R arc is arranged, water outlet has outer R arc;

C) revolve the maximum width that tube length 1. equals blade;

D) blade 2. maximum ga(u)ge be placed on the nearly lagging edge of golden section place, its acting face is second-class three pitch that become.