JPH04103263U - fiber reinforced plastic wing - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the molding of FRP blades and to prevent defects such as resin pools around the washer during molding. [Structure] After forming the FRP blade, a hole 8 having a widened inner diameter part 8a at the tip is provided at the end thereof, and a bolt mounting washer 4 is provided with a retaining ring 7 disposed in a circumferential groove on the outer periphery. By inserting the retaining ring 7 into the hole 8 and reaching the widening part 8a of the hole, and fixing it by injecting short fiber reinforced resin 10 between the hole 8 and the bolt mounting washer 4, the tape winding It is not necessary to embed the washer 4 inside, making it easier to mold the wing, using the retaining ring 7 to increase the strength against the pulling force of the washer 4, and injecting short fiber resin 10 between the hole 8 and the washer 4. As a result, the generation of resin pools, etc. is eliminated, and a highly reliable FRP blade is realized.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on fiber-reinforced plastic (hereinafter referred to as FRP), which is applied to wind power generation, etc. ) Regarding wings.

0002

[Conventional technology]

An example of the structure of conventional FRP etc. is shown in FIG.

0003 Figure 2(a) shows its overall structure, which is composed of a main girder 1 and an outer skin 2. The outer skin 2 was made by regular tape winding and hand lay-up using a mold. It is manufactured by gluing things together, and holes 3 for mounting stud bolts are provided at the base of the main girder 1. It was getting worse. In addition, since the wing is long, the middle part is omitted in this figure, and Figure 2(b) is 2(a) shows a view taken along the line B-B, and FIG. 2(c) shows a view taken along the line C-C of FIG. 2(a). There is.

0004 The details of section D in FIG. 2(a) are shown in FIG. 3(a), and the view taken along the line E-E in FIG. Shown in b). In this part, the washer 4 of the mounting bolt is embedded in the FRP laminated material. However, due to the complicated shape, tape winding molding did not go well, and as shown in Figure 3 ( Resin pooling defect 5 (in worse cases, voids) occurs at the locations shown in a) and (b). It was easy to grow.

[0005]

[Problem to be solved by the invention]

Conventional FRP blades had the following problems. (1) The washer is embedded during tape winding, but the washer has unevenness. As a result, the winding does not fit well, and the molding process requires a lot of effort. (2) Defects such as resin pools and voids are likely to occur around the washer.

[0006] The present invention attempts to solve the above problems.

[0007]

[Means to solve the problem]

The FRP blade of the present invention is provided at the end of the FRP blade and has a widening part in the inner diameter at the tip. It has a hole for attaching a stud bolt inserted into the same hole, and a circumferential groove is provided on the outer periphery. A washer for mounting a bolt, and a stop that is partially cut out and installed in the circumferential groove of the washer. Equipped with a ring and short fiber reinforced resin injected between the above hole and the bolt mounting washer. It is characterized by the fact that

[0008]

[Effect]

In the above, when attaching the bolt mounting washer to the end of the FRP wing, FR After forming the P wing, drill a hole at the end of the FRP wing with a widening part at the tip. do. Next, attach the retaining ring to the circumferential groove of the bolt mounting washer, and then raise the washer. Insert into the marking hole. When this washer is inserted into the hole, the retaining ring is attached to the tip of the hole. It widens to the widening part of the inner diameter and plays a role in preventing the washer from being pulled out. this state Then, inject short fiber reinforced resin between the bolt mounting washer and the hole to fix the washer. .

[0009] Due to the above, it is no longer necessary to embed the washer during tape winding. , it is easier to form the wing, and the anchor effect of the retaining ring makes it easier to tighten the washer. The hole and washer provided in the short part of the FRP blade can be expected to have the same strength as the conventional one against pull-out force. Because short fiber resin is injected and filled between the ingredients, the occurrence of conventional resin pools is eliminated. Achieving a highly reliable FRP wing.

0010

【Example】

An embodiment of the present invention will be described with reference to FIGS. 1(a), (b), and (c). Figure 1(a) , (b), and (c) are provided at the end of the main spar 1 forming the FRP blade. A hole 8 having a widened inner diameter part 8a at the tip thereof, and a stud bolt inserted into the hole 8. It has a mounting hole 3, a resin injection port 9 is provided at the tip of the mounting hole 3, and two circumferential holes are provided on the outer periphery. A bolt mounting washer 4 having a diagonal groove 6 is disposed in the circumferential groove 6 of the washer 4, respectively. A retaining ring 7 with a part cut out, and between the hole 8 and the bolt mounting washer 4. A short fiber-reinforced resin 10 is injected through a resin injection port 9 into the main body.

[0011] In the above, when attaching the bolt mounting washer 4 to the end of the main spar 1 of the FRP wing, In this case, after molding the FRP blade, first attach the end of the main girder 1 by a little more than the washer 4. A hole 8 with a large inner diameter is bored in the hole 8, and a widened inner diameter part 8a is provided at the tip.

0012 After making the hole 8, attach the retaining ring 7 to the bolt mounting washer 4, and Insert the metal fitting 4 into the hole 8. When this washer 4 is inserted into the hole 8, it is attached to the washer 4. The attached retaining ring 7 widens to the widened part 8a of the hole 8, and the washer 4 is pulled out. It plays a role in preventing damage.

[0013] In this state, inject resin from inside the stud bolt mounting hole 3 of the bolt mounting washer 4. Short fiber reinforced resin 10 is injected between the hole 8 and the washer 4 through the opening 9, and the washer 4 is fixed. to be determined.

[0014] As a result of the above, it is no longer necessary to embed the washer during conventional tape winding. This makes it easier to mold the wing, and since a retaining ring is used, its anchor effect makes it easier to mold the washer. It can be expected to have the same strength as the conventional one against the pull-out force of the tool, and a hole is provided at the end of the main girder to secure the washer. Because short fiber resin is filled between the ingredients and the ingredients, conventional resin pools and voids occur. was removed, making it possible to improve the reliability of FRP blades.

[0015]

[Effect of the idea]

The FRP blade of the present invention has a widened inner diameter at the tip end after the FRP blade is molded. A bolt mounting washer that has a hole with a hole and a retaining ring in a circumferential groove on the outer periphery. into the above hole, the retaining ring should reach the widening part of the hole, and the retaining ring should be inserted into the same hole and for attaching the bolt. Tape wind design is made by injecting short fiber reinforced resin between the washer and fixing it. It is no longer necessary to embed the washer during molding, making it easier to form the wing and Because the ring is used, its anchor effect provides the same strength as the conventional one against the pull-out force of the washer. Inject and fill short fiber resin between the hole provided at the end of the FRP wing and the washer fitting. As a result, the occurrence of conventional resin clumps, etc. is eliminated, and a highly reliable FRP blade is realized. Ru.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, in which (a) is an explanatory diagram of a bolt mounting washer, (b) is a view taken along arrow A-A in (a), and (c) is an explanatory diagram of the washer for bolt mounting. FIG. 3 is an explanatory diagram of holes for attaching metal fittings.

FIG. 2 is an explanatory diagram of a conventional device, in which (a) is an overall view;
(b) is a BB arrow view in (a), (c) is a C- in (a)
It is a view from arrow C.

FIG. 3 is a detailed view of section D of the conventional device, in which (a) is a sectional view and (b) is a view taken along the line E-E in (a). 1 Main girder 3 Stud bolt mounting hole 4 Bolt mounting washer 6 Circumferential groove 7 Retaining ring 8 Hole 8a Expanded portion 9 Resin injection port 10 Short fiber reinforced resin

Claims (1)

[Scope of utility model registration request] Claim 1: A bolt mounting hole provided at the end of a fiber-reinforced plastic wing and having a widening inner diameter at the tip, a stud bolt mounting hole inserted into the hole, and a circumferential groove provided on the outer periphery. A retaining ring disposed in a circumferential groove of the washer and partially cut out, and short fiber reinforced resin injected between the hole and the bolt mounting washer. Fiber-reinforced plastic wings.