Ship propeller with wavy blade surfaces

Abstract

The invention 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 and concentrate vortex, 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 invention relates to the technical field of improving propulsion performance of a propeller and suppressing cavitation, and in particular to a ship propeller with a wave-shaped blade surface. Background Art

[0002] With the development of science and technology, the design of propellers is constantly changing. In recent years, the research on propellers at home and abroad has included the study of bionic blade profiles, blade shapes, blade twisting, optimization of propeller-hull matching, and the use of auxiliary propellers to improve propeller efficiency. Due to the characteristics of the propeller itself: cavitation occurs during operation, resulting in a large amount of energy loss, damage to the propeller, noise generation and efficiency impact. Therefore, how to reduce cavitation and improve propulsion efficiency is a very meaningful topic. Summary of the invention

[0003] In view of the above-mentioned shortcomings, the present invention proposes a ship propeller with a wave-shaped blade surface. The propeller comprises a blade (1), a trailing edge (2), a leading edge (3), a section A (4), a section B (5), a section C (6), a section D (7), a section E (8), a section F (9), a section G (10), a section H (11), a section I (12), a hub (13), a hub cap (14), a propeller shaft (15), and a conventional blade (16). The propeller is characterized in that the thickness of the section B (5) is greater than that of the section A (4) and the section C (6), the thickness of the section D (7) is greater than that of the section C (6) and the section E (8), the thickness of the section F (9) is greater than that of the section E (8) and the section G (10), and the thickness of the section H (11) is greater than that of the section G (10) and the section I (12). All the sections are smoothly connected by curved surfaces to form a propeller blade (1), wherein the trailing edge (2) and the leading edge (3) are both smooth curves. The assembly relationship of the propeller is as follows: install the blade (1) on the propeller hub (13), and ensure that the blade of the propeller is correctly oriented. Insert the propeller shaft (15) into the center hole of the propeller hub (13), ensure that the propeller shaft and the propeller hub are tightly connected, and cover the propeller hub cap (14) on the top of the propeller hub (13), and ensure that the connection between the propeller hub cap and the propeller hub is firm. Through the above assembly relationship, the assembly of the ship propeller with a wavy blade surface is completed.

[0004] The ship propeller with a wavy blade surface can split the concentrated vortex and avoid energy accumulation at the blade tip, thereby reducing or delaying the generation of tip vortex cavitation and reducing the erosion of the blade surface caused by cavitation collapse. In addition, the wavy grooves increase the surface complexity, reduce the attachment area of ​​barnacles and other organisms, reduce the maintenance frequency, and indirectly improve the long-term operation efficiency. The invention provides a new design idea and method for the design of ship propellers.

[0005] Compared with the existing propeller, the present invention has the following beneficial effects: Reduce or delay the generation of tip vortex cavitation. Ship propellers with wavy blade surfaces can split concentrated vortices and prevent energy from gathering at the blade tip, thereby reducing or delaying the generation of tip vortex cavitation.

[0006] Improve long-term operation efficiency. The wavy grooves increase the surface complexity, reduce the attachment area of ​​barnacles and other organisms, reduce maintenance frequency, and indirectly improve long-term operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. The drawings described below are an embodiment of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0008] Figure 1 A schematic structural diagram of a blade of a ship propeller having a wavy blade surface provided in an embodiment of the present invention.

[0009] Figure 2 A schematic side view of a blade of a ship propeller with a wavy blade surface provided in an embodiment of the present invention.

[0010] Figure 3 A schematic structural diagram of a ship propeller with a wavy blade surface provided in an embodiment of the present invention.

[0011] Figure 4 A cross-sectional view of a blade of a ship propeller having a wavy blade surface provided in an embodiment of the present invention.

[0012] Figure 5 A cross-sectional view of a blade of a conventional ship propeller provided in an embodiment of the present invention.

[0013] Description of reference numerals: 1-blade, 2-following edge, 3-leading 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-shaft, 16-traditional blade. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] like Figure 1 As shown, an embodiment of the present invention provides a schematic diagram of the blade structure of a ship propeller with a wavy blade surface, and the blade surface is wavy.

[0016] like Figure 2 As shown, the trailing edge (2) and the leading edge (3) of the ship propeller with a wavy blade surface are smooth curves.

[0017] like Figure 3 As shown, one embodiment of the present invention provides a ship propeller with a wavy blade surface, comprising a blade (1), a hub (13), a hub cap (14) and a propeller shaft (15), wherein the blade surface is wavy.

[0018] like Figure 4 As shown, a ship propeller having a wavy blade surface has a wavy blade surface, wherein the thickness of section B (5) is greater than that of section A (4) and section C (6), the thickness of section D (7) is greater than that of section C (6) and section E (8), the thickness of section F (9) is greater than that of section E (8) and section G (10), and the thickness of section H (11) is greater than that of section G (10) and section I (12).

[0019] like Figure 5 As shown, the blade surface of a conventional ship propeller is straight.

[0020] Working principle: When a ship propeller with a wavy blade surface is working, the wavy blades can split the concentrated vortex to avoid energy accumulation at the blade tip, thereby reducing or delaying the generation of tip vortex cavitation.

[0021] In general, ship propellers with wavy blade surfaces can reduce or delay the generation of tip vortex cavitation, reduce the attachment area of ​​barnacles and other organisms, reduce maintenance frequency, and improve the performance and efficiency of the ship.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, the technical solution described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the present invention.

Claims

1. A ship propeller with a wavy blade surface, characterized in that: A blade (1), a trailing edge (2), a leading edge (3), a section A (4), a section B (5), a section C (6), a section D (7), a section E (8), a section F (9), a section G (10), a section H (11), a section I (12), a hub (13), a hub cap (14), a propeller shaft (15), and a conventional blade (16). The thickness of the section B (5) of the propeller blade is greater than that of the section A (4) and the section C (6), the thickness of the section D (7) is greater than that of the section C (6) and the section E (8), the thickness of the section F (9) is greater than that of the section E (8) and the section G (10), and the thickness of the section H (11) is greater than that of the section G (10) and the section I (12). All the sections are smoothly connected by curved surfaces to form a blade (1), wherein the trailing edge (2) and the leading edge (3) are both smooth curves.

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