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Multi-concave-plane propeller

A propeller, concave technology, used in propellers, rotating propellers, rotary propellers, etc., can solve problems such as not being widely promoted, and achieve the effect of reducing radial flow and high propulsion efficiency

Inactive Publication Date: 2015-10-21
李清林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing technical solutions for improving the propulsion efficiency of the propeller have problems such as limited improvement of the propulsion efficiency of the propeller, so they have not been widely promoted in practice. In practice, most merchant ships are installed with ordinary fixed-pitch propellers. There are mainly MAU-type and B-type propellers, the blades are airfoil or bow-shaped, and the thrust surface is a small curvature surface in the radial direction

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0018] Specific implementation mode 1, such as figure 1 As shown, the propeller blade is airfoil or bow-shaped, and the thrust surface of the blade is composed of multiple concave surfaces in the radial direction. The cross-section of each concave surface is arc-shaped, with equal depth and equal width.

specific Embodiment approach 2

[0019] Specific implementation mode 2, such as figure 2 As shown, the propeller blade is airfoil or bow-shaped, and the thrust surface of the blade is composed of multiple concave surfaces in the radial direction. The concave and convex positions of the suction surface correspond to the thrust surface, and the concave grooves corresponding to the suction surface also form concentric circles.

specific Embodiment approach 3

[0020] Specific implementation mode 3, such as image 3 As shown, the propeller blade is a sheet type, and the blade body is composed of multiple concave surfaces in the radial direction. The cross-section of each concave surface is arc-shaped, with equal depth and equal width, and each concave surface forms a concentric circle.

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Abstract

Disclosed in the invention is a multi-concave-plane propeller comprising a propeller hub and a blade. A thrust surface of the propeller blade is formed by a plurality of concave planes at the radial direction. Compared with the prior art, the multi-concave-plane propeller has the following beneficial effects: the thrust surface of the propeller blade is formed by a plurality of concave planes at the radial direction and the large thrust force can be provided with the same protection area; and the radial streaming can be reduced and thus the propeller with the high thrust efficiency can be provided.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a multi-concave propeller. Background technique [0002] As a propulsion or energy conversion device, the propeller has a wide range of applications in reality. According to the working method, it can be divided into the following categories: 1. Use the reaction force to the fluid to propel, such as ships and airplanes, which use propellers, which are customarily called propellers; 2. Apply energy to the fluid to complete the transportation of fluids such as air and water. , which are customarily called fans or pump blades, etc.; 3. Absorb and utilize the kinetic energy of the fluid to convert it into mechanical energy, which are customarily called blades or turbines for wind power and hydropower generation. [0003] The propeller is the most widely used propulsion method in the existing ship propulsion technology. The propeller is generally composed of a hub and blades. The blade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H1/26B64C11/18F03D1/06F03B3/12F04D29/32F04D29/18
CPCY02E10/20Y02E10/72
Inventor 李清林
Owner 李清林
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