JPS6094119A - Cylindrical body made of fiber-reinforced plastic - Google Patents

Abstract

PURPOSE:To facilitate the balance adjustment of a cylindrical body, and to improve the strength and the leak resistance by forming a bellows connected with a part of a fiber layer of a straight-tube part, and making the thickness thinner than the straight-tube part in a cylindrical body for a centrifugal as separator made of a fiber-reinforced plastics. CONSTITUTION:A resin-impregnated fiber is wound on the surface of a mold 3 to form an inner layer C of a straight-tube part 1 and a bellows 2, and a release agent 4 having a releasing function such as ring-shaped silicone rubber or putty is coated on the belt-shaped part corresponding to the bellows 2. Then after an intermediate layer B is formed by winding the resin-impregnated fiber, the release agent 4 is thinly coated in the same way. After an outer layer A is formed, the fiber is tightly adhered to the surface of the mold by external pressure to form a cylindrical body in the composite shape. The part 5 is cut off from the inside of the straight-tube part 1, and the boundary 6 from the outside to remove the parts C' and A' along with the release agent 4.

Description

[Detailed description of the invention] [Technical portion of the invention! l'P] The present invention relates to a cylindrical body made of fiber-reinforced plastic made of composite material reinforced with cuff fibers, carbon fibers, etc.

[Technical background of the invention and its problems] Among fiber-reinforced composite materials, composite materials reinforced with fibers such as crow, carbon, and aramid have a specific strength (strength at break relative to their own strength) that is greater than that of metals. It is used for high-speed rotating cylinders.

However, composite materials that are strong in the fiber direction also have 11i!
Since the anisotropy +4 is extremely weak in the direction perpendicular to 1E, the fiber M is wound in the axial direction as well as the circumferential direction in the high speed rotating cylinder. In order to rotate the elongated cylindrical body formed in this way at high speed, it is necessary to divide the cylindrical body into appropriate lengths and connect them with bellows in order to easily cover the balancing work. ,
It is publicly known from Publication No. 56-14, 7917. At present, the connecting portion between the straight pipe portion of the cylindrical body and the bellows must be joined using an adhesive. However, the bonding part is relatively weak against bending force, etc., and the bending force caused by the high speed rotation 114 causes the joint part with the cylindrical part to It has the disadvantage of being easily peeled off and lacking in reliability.

Item 1 of "Invention 1" The present invention has been made to eliminate this drawback of the conventional method.
The purpose of this invention is to provide a cylindrical body made of plastic deck reinforced with binding strings that has excellent reliability by avoiding ja.

[Summary of the invention] The present invention is ll:i? In a cylindrical body made of plastic deck reinforced with Ic woven eaves 1, the bellows are continuous from a part of the fiber layer of the straight pipe part and are connected to the straight pipe part J, I characterized by being formed into 119 pieces of meat.
[If (It is a cylindrical body made of reinforced plastic.

According to the present invention, one of the tongues on which bending force acts and the straight pipe portion
The flexibility of the bellows is increased by integrally forming the connecting part with a fiber-reinforced plastic layer.
;Easy to correct the balance of a single rod and improve strength and leak resistance.

[Embodiment of the Invention] Hereinafter, a description will be given of FIGS. 1 to 3 showing an embodiment of a cylindrical body according to the present invention.

In FIG. 1, reference numeral 1 indicates a straight pipe section forming a cylindrical body, and this straight pipe section 1 is connected by a plurality of bellows 2.

Fig. 2 is an enlarged cross-sectional view of the connected state of the straight pipe part 1 and the bellows 2.
The bellows 2 is formed of the same fiber-wound corner layer as the B layer of the straight pipe portion 1. In other words, the 0th layer is wound in the axial direction, the B layer is wound in an oblique direction, the A layer is wound in an outer circumference, and the B layer is formed by continuously winding the bellows 2 and the straight tube part 1. There is. Originally, it is desired that the rigidity of the bellows 2 be extremely small compared to that of the straight pipe portion 1 in order to easily achieve high-speed rotation. Therefore, it is preferable for the bellows 2 to be thin and have a large sliding ridge height for the purpose of increasing flexibility. However, an increase in the height of the bellows means an increase in the difference in radius of the constituent members, which increases the bending force during high-speed rotation, so this must be avoided, and in the end it is necessary to make the wall as thin as possible. . Moreover, bellows 2 and straight pipe 8111
Since it is desirable to form the joints in one piece without relying on adhesion, they are not shown in FIG. 2 and are therefore omitted. Bellow 2 is yen 1:
It suffices if it is made of a continuous layer with a part of the layers forming one body, and it is not necessarily necessary to make it with tYiB at a specific position as shown in the figure.
<'CG J, and is not limited to the +11- layer.

Next, an example of a method for forming the straight pipe portion 1 and the joint 1]-2 of the cylindrical body 4115 will be described with reference to FIG.

FIG. 3 is an enlarged cross-sectional view of the straight pipe part 1 of the circular body and the bellows 2. The straight pipe part 1 of the cylindrical body is formed of, for example, three layers A, B, and C (
Indicates the case where it is broken. In the figure, 2 is a bellows, 3 is a bellows, and 3 is a bellows.
The mold is made of resistant materials that can be easily crushed and removed, such as soluble salts.

First, resin-impregnated fibers are wound around the surface of the mold 3 to form the ll-1 tube part 1 of the cylindrical body and the inner layer C of the bellows 2, and the strip-shaped part corresponding to the bellows 2 has a mold release effect. A mold release agent 4 such as silicone rubber or putty is coated on the ring bell 1. Next, the intermediate layer B is formed by winding the resin-impregnated fibers Q' (formed by rolling and then thinly released in the same manner as above)'! Apply agent 4. Then, after forming outer layer A, 9L FF
lko, 1; - τ Tomoe f1 All fibers are covered with rust on the surface of the armor,
A straight part 1 and a bellows 2 are continuously integrated into a composite-shaped cylindrical body. In order to fix the shape, the resin is usually heated to form 1a, and then the mold 3 is broken and removed.

Next, as shown in FIG.
The portion 5 indicating the boundary between the bellows 2 and the boundary 6 from the outside are cut with a knife or laser beam, and the portions C' and Δ' are removed together with the first type agent 4. Through the above steps, a circle ft1i (
Can you get the book?

Here, an example of a specific layer structure of the cylindrical body will be explained. Generally, in order to facilitate balancing work, it is desirable for long high-speed cylindrical bodies to have a small number of bellows.

By designing the straight pipe section to have a large bending rigidity, the straight pipe section itself can be made as long as possible, so that the fibers of the layer C in FIG. The A layer is wound approximately in the circumferential direction to withstand the hoop stress during high speed rotation.The B layer has intermediate performance between the A and C layers. There is a current C of i. bellow 2
7) C It is possible to make 111 turns of both axial windings with 61 degrees of bending.

[Invention Glue] Song Dynasty 1 As mentioned above, the cylindrical body according to the present invention has a bellows 2 with a diameter of 1"1.
At the end l formed continuously and integrally with the intermediate layer of part 1
It is assumed that since the pipe rat, J, and the pipe are formed with a thin wall, it is possible to cope with the bending that occurs at the bellows and the joint between the bellows and the straight pipe part, which is required for high-speed rotation. To,
It is possible to realize a 1ql bellows in a flexible 1/l.

It facilitates the balancing work required for high-speed rotation, but it also has high strength against bending forces, etc., and leak resistance.
It is possible to provide a cylindrical body with a high reliability of 1:1. .

[Brief explanation of drawings]

Fig. '1 is a stop view showing an embodiment of the cylindrical body according to the present invention, and Fig. 2 is an enlarged sectional view showing the state of connection between the straight pipe part and the bellows in the cylindrical body shown in Fig. 1. 3 is a sectional view showing an example of the bellows forming method shown in FIG. 2. 1... straight pipe part of cylindrical body 2... bellows 3... type
4...Release agent 5.6...Cut points A, B, C, A', C'...Abrasion layer Application agent Patent attorney Kensuke Chika (1 other person)

Claims (3)

[Claims] (1) In a cylindrical body made of fiber-reinforced plastic in which a bellows is integrally formed in a straight pipe part, the bellows is continuous from a part of the first layer of the machine shoulder in the 11 inch section and extends from the straight pipe part a.
A cylindrical body made of senma 11-reinforced shirasu deck, characterized by being formed into a thick layer. (2) The straight pipe part is made up of three layers: an inner layer wound in an axial direction, an intermediate layer wound in a diagonal manner, and an outer layer wound in an l'J circumferential manner. Woven as described in item 1 of the range! ?
11 Cylindrical body made of reinforced glass. (3) Her, +-+J straight broom, middle of the part! The fiber 1 [reinforced plastic cylindrical body] according to claim 1, characterized in that the fiber is continuously and obliquely wound.