Ship propeller with wavy blade surfaces

Abstract

The utility model discloses a ship propeller with wavy blade surfaces. The ship propeller comprises blades (1), following edges (2), guide edges (3), a cross section A (4), a cross section B (5), a cross section C (6), a cross section D (7), a cross section E (8), a cross section F (9), a cross section G (10), a cross section H (11), a cross section I (12), a propeller hub (13), a propeller hub cap (14), a propeller shaft (15) and traditional blades (16). Compared with a traditional propeller, the wave-shaped blades can divide concentrated vortexes, energy is prevented from being gathered at blade tips, accordingly, generation of tip vortex cavitation bubbles is reduced or delayed, and denudation of cavitation bubble collapse to the surfaces of the blades is reduced. The surface complexity is increased through the wave-shaped grooves, the attachment area of organisms such as barnacles is reduced, the maintenance frequency is reduced, and the long-term operation efficiency is indirectly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field that improves propeller propulsion performance and inhibits cavitation especially relates to a ship propeller with wavy blade surface. BACKGROUND

[0002] With the development of science and technology, the design of propeller is also changing, in recent years, the research on propeller at home and abroad, there is research bionic section, propeller shape, propeller twist, propeller and the matching optimization of ship body, also have the way of setting auxiliary propeller to improve the efficiency of propeller etc. Due to the characteristics of propeller: in the operation process, cavitation phenomenon occurs, resulting in a large amount of energy loss, causing damage to the propeller, producing noise and affecting efficiency. Therefore, how to reduce cavitation phenomenon and improve the driving efficiency is a very meaningful topic. SUMMARY

[0003] In view of the above existing shortage, the utility model provides a ship propeller with wavy blade surface. Including blade (1), with edge (2), guide edge (3), section A (4), section B (5), section C (6), section D (7), section E (8), section F (9), section G (10), section H (11), section I (12), hub (13), hub cap (14), shaft (15), traditional blade (16). Its characterized in that, the thickness of section B (5) is greater than section A (4) and section C (6), the thickness of section D (7) is greater than section C (6) and section E (8), the thickness of section F (9) is greater than section E (8) and section G (10), the thickness of section H (11) is greater than section G (10) and section I (12). All sections are smoothly connected through curved surface, forming blade (1), wherein with edge (2) and guide edge (3) are smooth curves. The assembly relationship of propeller is as follows, blade (1) is installed in hub (13), to ensure that the blade of propeller is correctly oriented. Insert the shaft (15) into the center hole of hub (13), ensure that the shaft is closely connected with the hub, cover the hub cap (14) on the top of hub (13), ensure that the connection between hub cap and hub is firm. Through the above assembly relationship, the assembly of ship propeller with wavy blade surface is completed.

[0004] The ship propeller with wavy blade surface can divide and concentrate vortex, avoid energy gathering at the blade tip, thereby reducing or delaying the generation of tip vortex cavitation, reducing the erosion of cavitation collapse to the blade surface. And the wavy groove increases the surface complexity, reduces the attachment area of barnacles and other organisms, reduces the maintenance frequency, and indirectly improves the long-term operation efficiency. The utility model provides a new design idea and method for the design of marine propeller.

[0005] Compared with the existing propeller, the propeller has the following beneficial effects:

[0006] Reduce or delay the generation of tip vortex cavitation. The wave-shaped ship propeller can divide the concentrated vortex, avoid the energy gathering at the blade tip, thereby reducing or delaying the generation of tip vortex cavitation.

[0007] Improve the efficiency of long-term operation. The wave-shaped groove increases the surface complexity, reduces the biological attachment area of barnacles and the like, reduces the maintenance frequency, and indirectly improves the long-term operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. The drawings described below are an embodiment of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0009] Figure 1 A structure schematic view of the blade of the wave-shaped ship propeller is provided for the embodiment of the present application.

[0010] Figure 2 A side view schematic view of the blade of the wave-shaped ship propeller is provided for the embodiment of the present application.

[0011] Figure 3 A structure schematic view of the wave-shaped ship propeller is provided for the embodiment of the present application.

[0012] Figure 4 A blade cross-sectional view of the wave-shaped ship propeller is provided for the embodiment of the present application.

[0013] Figure 5 A blade cross-sectional view of the traditional ship propeller is provided for the embodiment of the present application.

[0014] Explanation of reference signs:

[0015] 1-blade, 2-rim, 3-guide edge, 4-section A, 5-section B, 6-section C, 7-section D, 8-section E, 9-section F, 10-section G, 11-section H, 12-section I, 13-hub, 14-hub cap, 15-propeller shaft, 16-traditional blade. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] As Figure 1 shown in the utility model one embodiment proposes a kind of blade surface is the schematic diagram of blade structure of ship propeller of wave type, blade surface presents wave type.

[0018] As Figure 2 shown, trailing edge (2) and guide edge (3) of the blade surface is the ship propeller of wave type are smooth curve.

[0019] As Figure 3 shown, the utility model one embodiment proposes a kind of blade surface is the ship propeller of wave type, it includes blade (1), boss (13), boss cap (14) and propeller shaft (15), blade surface presents wave type.

[0020] As Figure 4 shown, the blade surface of a kind of blade surface is the schematic diagram of blade structure of ship propeller of wave type, and blade surface presents wave type, wherein, the thickness of section B (5) is greater than section A (4) and section C (6), the thickness of section D (7) is greater than section C (6) and section E (8), the thickness of section F (9) is greater than section E (8) and section G (10), the thickness of section H (11) is greater than section G (10) and section I (12).

[0021] As Figure 5 shown, the blade surface of traditional ship propeller is straight line type.

[0022] Working principle: when the blade surface is the ship propeller of wave type, wave blade can be divided into concentrated eddy current, avoid energy to gather in blade tip, to reduce or delay the generation of tip vortex cavity.

[0023] Overall, the blade surface is the ship propeller of wave type, can reduce or delay the generation of tip vortex cavity, reduce the area of biological attachment such as barnacle, reduce maintenance frequency, improve the performance and efficiency of ship.

[0024] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, the technical solutions described in the foregoing examples can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements will not make the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A marine propeller having a wave-shaped blade surface, characterized in that: Blade (1), trailing edge (2), leading edge (3), section A (4), section B (5), section C (6), section D (7), section E (8), section F (9), section G (10), section H (11), section I (12), hub (13), hub cap (14), shaft (15), conventional blade (16), the thickness of the propeller blade section B (5) is greater than section A (4) and section C (6), the thickness of section D (7) is greater than section C (6) and section E (8), the thickness of section F (9) is greater than section E (8) and section G (10), the thickness of section H (11) is greater than section G (10) and section I (12), all sections are smoothly connected by curved surface, forming a blade (1), wherein the trailing edge (2) and the leading edge (3) are smooth curves.

Images