CN2258143Y

CN2258143Y - Unequal blade-distance symmetrical butterfly four-blade propeller

Info

Publication number: CN2258143Y
Application number: CN 95221805
Authority: CN
Inventors: 耿达明
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-07
Filing date: 1995-09-07
Publication date: 1997-07-23
Anticipated expiration: 2005-09-07

Abstract

The utility model relates to an unequal blade-distance symmetrical butterfly-shaped four-blade propeller which belongs to propelling components which directly act on fluids, particularly an improved propeller. The angular distribution situation on the rotating shaft circumference of the existing propeller blades is changed, and a novel unequal blade-distance symmetrical butterfly-shaped four-blade propeller is provided. The utility model is characterized in that the distribution of four-blade propeller blades on the rotating shaft circumference forms an unequal blade-distance symmetrical shape, and the included angles of the two adjacent propeller blades of the four-blade propeller blades are a wide angle A and a narrow angle B in turn. The utility model can substantially raise fluidic displacement and thrust force of the propeller, and reduces centrifugal circulatory flow. The utility model has the advantages of large displacement, low noise, high efficiency, and wide purpose, and changing adaptation range of rotating speed is wide.

Description

Do not wait blde pitch symmetry butterfly quadruple

The utility model belongs to the propulsion component that acts directly on the fluid.Particularly a kind of improved screw propeller.

The propelling unit of present boats and ships includes and acts directly on propulsion component waterborne is screw propeller.Act directly on the propulsion component on the air, for example carry-on propulsion component also has screw propeller.Though when now advancing with the two-bladed porpeller running the big advantage of fluid compression ratio is arranged, because the fluid upset, loss is big.Blade etc. the blde pitch quadruple all is 90 ° over against claiming installation, and the fluid displacement and the thrust of screw propeller were less when running advanced, and centrifugal circulation is bigger.No matter thereby what shape the blade of above-mentioned equidistant quadruple design make, blde pitch such as all can not change and be 90 ° over against claiming to install the drawbacks that blade brings.

At the problems referred to above, the utility model changes the existing angle distribution situation of screw blade on the S. A. circumference, and a kind of later-model blde pitch symmetry butterfly quadruple that do not wait is provided.Can increase substantially the fluid displacement and the thrust of screw propeller, reduce centrifugal circulation.

The utility model is realized with following mode: it comprises blade 1 and S. A. 2, feature is that the distribution of quadruple leaf 1 on S. A. 2 circumference is and do not wait the blde pitch symmetric shape, the angle of its adjacent two-bladed porpeller leaf 1 is ∠ A, ∠ B successively, and 90 °＜∠ A＜130 °, 50 °＜∠ B＜90 °.This angle optimum value ∠ A of the described adjacent two-bladed porpeller leaf 1 of blde pitch symmetry butterfly quadruple that do not wait equals 120 °, and ∠ B equals 60 °.

The utility model has following advantage: 1, discharge capacity is big.Owing to adopt the wide-angle blde pitch to distribute between two groups of symmetry blades, relatively blade be 90 ° over against claim to install etc. blde pitch quadruple compression stroke long, the compression ratio increasing.2, noise is low.Spaced apart because of big angle ∠ A blde pitch and little angle ∠ B blde pitch, reduced resonance, reduced noise.3, efficient height.A little less than the relatively more existing centrifugal circulation of screw propeller, fluid is unidirectional to be concentrated, and row's speed is high, and thrust is big, so can obtain higher efficient.4, rotating speed changes the applicable area broad.Change the rotating speed of screw propeller in a big way, can both increase discharge capacity row speed with being directly proportional.5, purposes is wide.This blde pitch symmetry butterfly quadruple that do not wait is adapted to water, gas, wet goods fluid, widely is used for manufacturings such as ship ship, aircraft, pump, fan, machine.

Fig. 1-Fig. 2 is the utility model structural representation.Wherein Fig. 1 is a front view; Fig. 2 is a birds-eye view.

With reference to Fig. 1, Fig. 2, this not wait the angle of its adjacent two-bladed porpeller leaf 1 of blde pitch symmetry butterfly quadruple be ∠ A, ∠ B successively, and the big angle is ∠ A, is 120 °; Little angle is ∠ B, is 60 °.People know that the efficient high noisy was low when the tail fin of wing, the dolphin of butterfly, dragonfly was made flapping wing and advanced, and are excellent biological propelling units.Butterfly is made in 1 imitation of the utility model blade, can obtain good technique effect.Blade 1 also can imitate makes dragonfly shape etc.

Claims

1, a kind of blde pitch symmetry butterfly quadruple that do not wait, comprise blade [1] and S. A. [2], its feature is in: the distribution of quadruple leaf [1] on S. A. [2] circumference and does not wait the blde pitch symmetric shape, the angle of its adjacent two-bladed porpeller leaf [1] is ∠ A, ∠ B successively, and 90 °＜∠ A＜130 °, 50 °＜∠ B＜90 °.

2, the blde pitch symmetry butterfly quadruple that do not wait according to claim 1 is characterized in that the angle ∠ A of adjacent two-bladed porpeller leaf [1] equals 120 °, and ∠ B equals 60 °.