JPS58101897A - Frp propeller vane with metal frame - Google Patents

Abstract

PURPOSE:To improve impact resistivity and seaming strength at the boundary of the rim part of a vane by using a metal frame at the rim part and a laminated FRP at the middle part thereof. CONSTITUTION:The rim part 1 of a propeller vane is made of stainless steel or the like and the middle part 4 thereof is made up of bonded lamination of FRP. The rim part 2 of the vane has a ridge 3 at the center so as to prevent removal of the FRP which is fitted into the vane at the middle and seamed and to enlarge the seamed area of both members. The metal frame of the rim part of the vane may protect it from an impact by, a drifting wood or so and the FRP employed the middle may reduce the total weight. Additionally, improvement of the surface roughness of the vane, prevention of adherence of marine lives and improvement of the power transmission efficiency are achieved.

Description

[Detailed Description of the Invention] A metal frame is used at the wing edge where impact strength is required to improve impact resistance, and the ability to avoid biological sticking is required before improving surface roughness. The present invention relates to a composite propeller that utilizes the characteristics of FRP materials in the center of the blade and improves the joint strength at the boundary.

Propellers using FRP materials have been manufactured for the purpose of improving corrosion resistance and reducing weight, but the drawback is that the blade edges are damaged by impact with driftwood, and this damage becomes rough. There was a drawback that the laminated and molded members gradually peeled off.

However, the light weight and corrosion resistance of FRP materials are worthless, and from an energy-saving perspective, reducing propeller weight reduces frictional resistance at the propeller shaft bearings and is effective in improving power transmission efficiency. As a result, it became necessary to produce a propeller blade that effectively takes advantage of the properties of both gold and FRP, and is safe and energy-saving.

The present invention will be explained in detail with reference to the drawings.

Figure 1 shows an overall view of the propeller. This propeller 1
The propeller blade seam 1 is made of the same material as the propeller 1, and is usually made of manganese bronze, aluminum bronze, or stainless steel. This wing center portion 4 is manufactured by laminating laminated FRP materials. Figure w12 shows the A-m cross section. The propeller blade edge 2 has a protrusion 8 in the center to prevent the FRP material that is fitted and joined to the blade center from falling off, and also to increase the bonding area between the two parts to facilitate the bonding of the metal frame and the FRP material. Fig. 8 shows an alternative plan of the A-A cross section, in which a groove S is provided in place of the central protrusion 8, and the FRP material is inserted into this to strengthen the structure for reinforcement. , Equation In this way, the present invention makes the blade edge of a propeller blade of a ship to be in the shape of a recreational frame, and the shape of the frame on the wing center side is either a shape with a protrusion in the center or a groove in the center. It has a shape that is intruded into the shape, and the product is 11FR, which forms the center part of the propeller blade.
When P material is pasted together from the forward and backward surfaces and formed,
The center FRP-
The metal frame at the wing edge protects against impact from driftwood, etc., and the center part uses FRP material to reduce weight, improve the surface roughness of the wing, and protect against biological damage. Since the propeller blades are made of composite material that prevents adhesion and improves power transmission efficiency, they also have good energy-saving effects.

[Brief explanation of the drawing]

i@Figure 1 is an overall view of the propeller, Figure 2 is a cross-sectional view of the moom,
Figure 188 shows an alternative to the Moom sectional view. 1. Propeller 2. Propeller blade edge 8, protrusion 4. Laminated FRP wing manufacturing part central groove procedural amendment (method) May 1, 1980 Haruki Shimada, Commissioner of the Patent Office 1. Indication ° 1980 Patent Application No. 200558 2. Name of the invention With metal frame FRP propeller blade 3, Relationship with the case of the person making the amendment Representative patent applicant address: 6-8-4 Chiyoda-cho, Tokuyama City, Yamaro Prefecture, date of amendment: August 30, 1980 5, subject of amendment: Drawing 6, amendment Contents as attached

Claims (1)

[Claims] If the edge of a ship's propeller blade is made of a metal frame, the shape of the frame on the center side of the wing should be either a protruding shape in the center or a groove-like shape in the center. Laminated FRP material forming the center from the forward and backward surfaces!
When the W is pressed together and formed, the center FRP layer is held firmly by the protrusions or grooves inside the metal rod, and the metal frame at the wing edge protects against impact from driftwood, etc., and the center The part is FR
A propeller blade made of composite material that reduces weight by using P material, improves the surface roughness of the blade, prevents biofouling, and improves power transmission efficiency.