JPH07289947A - Composite rotator - Google Patents

Abstract

PURPOSE:To provide a composite rotator composed of fiber reinforced resin and metal which can be used for a centrifugal separator for treating a large amount of liquid in the atmosphere and under a high centrifugal force. CONSTITUTION:A double cylindrical structure body is formed by bonding a fiber reinforced resin cylinder 2 comprising reinforced fiber oriented in the peripheral direction in the wall thickness of 0.1 mm or more and of 50% or less of the total wall thickness with the outer periphery of the metal cylinder 1 in a cylindrical outermost peripheral section 5 of a fiber reinforced resin cylinder 2. The number of revolutions of two times as much and the centrifugal force of four times as much can be provided by the arrangement compared with a conventional metal revolving body. Further, a container-shaped high speed composite revolving body can be manufactured by using a closed-end metal cylinder, and as a result, a centrifugal separator provided with high separation performance which can separate a large amount of liquid can be manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body using a fiber reinforced resin which can be used in the rotating part of a centrifugal separator.

[0002]

2. Description of the Related Art Centrifuges using high-strength and high-elasticity carbon fiber reinforced resin in a rotating portion are used for separating a mixture of substances having different specific gravities by centrifugal force.
For example, nuclear-related uranium enrichment process, marine fuel oil cleaning process, and separation process in the bio field are typical applications. In the centrifuge used for the separation of uranium gas related to nuclear power described above, as disclosed in Japanese Patent Application Laid-Open No. 50-136378, a metal foil tape is wound around the inner surface of a carbon fiber reinforced resin cylinder, and 50-56331
As disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, there is often a structure in which a corrosion resistant coating layer is provided on the inner surface of a carbon fiber reinforced resin cylinder to protect the fiber reinforced resin portion. On the other hand, in centrifugal separators used in the process of cleaning marine fuel oil, metallic materials such as stainless steel, which are hard to be corroded and have high physical abrasion resistance, have been conventionally used. Further, in the field of biotechnology, for example, as disclosed in JP-A-60-305952, a carbon fiber reinforced resin is used for a solid type rotary rotor into which a plurality of test tube-shaped containers can be inserted. .

In these inventions, although the carbon fiber reinforced resin portion is protected and applied to a centrifugal separator having a high centrifugal force, it is mainly used for uranium gas separation in relation to nuclear power, and is used for liquid separation. Not a thing. In the field of biotechnology, it is also used as a fixture for a small volume test tube size solid carbon fiber reinforced resin container and is used for separating impurities from a large amount of liquid such as fuel oil. is not.

Further, in the prior art, even if the centrifugal separator is aimed at a high rotational speed operation in order to improve the performance of separating impurities from a large amount of liquid such as fuel oil, the specific strength (strength / specific gravity) and ratio With a rotating body made of stainless steel or the like having low rigidity (rigidity / specific gravity), there is a limit to the centrifugal force that can be realized. As a measure to realize a high rotation speed, it is conceivable to use a material having higher specific strength and higher specific rigidity than stainless steel as a constituent material of the rotating body. For example, Japanese Patent Application No. 4-
As disclosed in Japanese Patent Application No. 147647 and Japanese Patent Application No. 4-147648, a composite pipe body in which a carbon fiber reinforced plastic cylinder is arranged outside a metal cylinder has been developed.

In these inventions, the reinforcing fibers of the carbon fiber reinforced plastic cylinder located outside the metal cylinder are oriented obliquely with respect to the circumferential direction, and the reinforcing fibers are discontinuous at the ends of the cylinder. There is. Therefore, high-speed rotation can be achieved without any problems in vacuum, but in the atmosphere, when the outermost discontinuous fibers of the carbon fiber reinforced plastic cylinder forming a laminated structure have a centrifugal force greater than the adhesive force between layers, the cylinder It was sometimes peeled from the end.

[0006]

The object of the present invention is to solve the above-mentioned problems and to use a fiber reinforced resin and a metal which can be used in a centrifuge capable of treating a large amount of liquid in the atmosphere under a high centrifugal force. To provide a composite rotating body.

[0007]

According to the present invention, in the outermost peripheral portion of a fiber-reinforced resin cylinder, reinforcing fibers having a wall thickness of 0.1 mm or more and 50% or less of the total wall thickness are oriented in the circumferential direction. A composite rotating body, characterized in that it is a double-cylindrical structure formed by closely adhering the fiber-reinforced resin cylinder to the outer periphery of a metal cylinder.

The present invention will be described in detail below. FIG. 1 shows an example of a sectional view of a composite rotating body according to the present invention. A fiber-reinforced resin cylinder 2 is arranged on the outer periphery of a metal container 1, and both are integrated by an adhesive 3. Further, the outermost portion 5 of the fiber-reinforced resin cylinder 2 has reinforcing fibers arranged in the circumferential direction, and the reinforcing fibers in the inner portion 4 may be arranged in any direction.

When the fiber-reinforced resin cylinder 2 on the outer circumference of the metal cylinder is not provided with the reinforcing fibers in the outermost direction 5 in the circumferential direction, the reinforcing fibers become discontinuous at the ends of the cylinder. Further, when rotating at a high speed in the atmosphere, frictional heat with air is generated, and the strength of the resin portion of the fiber-reinforced resin cylinder on the outer periphery of the metal cylinder decreases due to the heat. In combination with this, the discontinuous reinforcing fibers at the end of the cylinder may be peeled off by centrifugal force. For this reason, the outermost part 5 of the fiber-reinforced resin cylinder 2 has reinforcing fibers arranged in the circumferential direction.

The reinforcing fibers of the fiber-reinforced resin cylinder 2 may be any as long as they satisfy the use conditions, and carbon fibers, organic fibers, glass fibers and the like can be used. As the base resin, thermosetting resins such as epoxy resins and unsaturated polyester resins and thermoplastic resins such as polypropylene and polyether ether ketone can be used. The wall thickness satisfies the usage conditions,
It is necessary to secure the minimum wall thickness that can be machined. For example, it is at least 2.0 mm or more. The upper limit of the wall thickness is not particularly specified, but about 50 mm is the maximum from the viewpoint of molding.

The wall thickness of the outermost part 5 of the fiber-reinforced resin cylinder 2 is not particularly limited, but is preferably 0.1 mm or more. This minimum wall thickness is naturally determined by molding conditions such as the filament winding method, and it is difficult to approach 0 mm infinitely, and about 0.1 mm is the limit of the molding method. The upper limit is about 50% of the wall thickness of the fiber-reinforced resin cylinder 2. This is determined by the balance of rigidity, strength, etc. of the fiber-reinforced resin cylinder 2 in various directions, but is also restricted from the viewpoint of molding. That is, when the circumferential winding is formed thicker than necessary, cracks occur during the forming due to the influence of thermal stress and the like. The thickness of the outermost portion 5 is preferably about half the thickness of the fiber-reinforced resin cylinder 2. The material of the adhesive 3 is
Any material may be used as long as it satisfies the use conditions, and an epoxy adhesive or the like can be used.

The metal cylinder may be made of any material as long as it satisfies the usage conditions, and stainless steel, titanium alloy or the like can be used. The wall thickness must satisfy the usage conditions and ensure the minimum wall thickness that can be machined. For example, at least 2.0
mm or more. The upper limit of the wall thickness is not particularly specified, but if it is made thicker than necessary, the rotating electric motor will be burdened, and therefore the maximum value is about 20 mm.

The composite rotary body according to the present invention can be manufactured, for example, by the following method. First, a metal cylinder is processed into a desired size and shape. Next, a fiber-reinforced resin cylinder is produced independently of the metal cylinder. As the manufacturing method, for example, the following method can be applied. Wrap around a metal mandrel while impregnating a continuous fiber with a liquid resin, cure the resin, and then pull out the mandrel, or wind the metal mandrel with a strand or tape that is pre-impregnated with the resin. There is a winding method in which the mandrel is pulled out after the application and curing of the resin.

The inner surface of the fiber reinforced resin cylinder is machined so that it can be fitted with the metal cylinder, and they are integrated by using an adhesive. At this time, if the inner diameter of the fiber-reinforced resin cylinder is set to a size that can fit with the metal cylinder,
There is no need to machine the inner surface of the cylinder. It is also possible to directly fabricate a fiber-reinforced resin cylinder on the outer periphery of the metal cylinder by, for example, the filament winding method.
In this case, the matrix resin of the fiber-reinforced resin cylinder also serves as an adhesive. After the integration, the cylindrical end is machined to obtain a rotating body having a desired size and shape.

[0015]

EXAMPLE As shown in FIG. 2 as an example of a composite rotating body,
Using the bottomed metal cylinder 6, a container-shaped composite rotating body was produced. An example is shown below. [Example 1] A metal cylinder was made of titanium and processed into a thickness of 5.0 mm, an outer diameter of 235 mm, and a length of 160 mm. The fiber-reinforced resin cylinder used carbon fiber as the reinforcing fiber and epoxy resin as the base material. A cylinder having an inner diameter of 231 mm, an outer diameter of 275 mm, a wall thickness of 22 mm, and a length of 180 mm was produced by the filament winding method. Inner part 21 of the wall thickness of 22 mm
The reinforcing fibers were arranged at ± 80 ° with respect to the axial direction in mm, and the reinforcing fibers were arranged in the circumferential direction at the outermost 1 mm. Then, the inner surface 23
Machined to 5 mm. An epoxy adhesive (Chirageigy Inc., Araldite) was applied to the outer surface of the metal cylinder and the inner surface of the fiber reinforced resin cylinder, that is, the adhesive surface, and both were adhered and held at 80 ° C. for 12 hours. A metal cylinder and a fiber-reinforced resin cylinder were integrated and machined to a length of 160 mm to obtain a container-shaped composite pipe.

[Example 2] A metal cylinder was made of titanium and processed to have a thickness of 5.0 mm, an outer diameter of 235 mm and a length of 160 mm. The fiber reinforced resin cylinder is made of carbon fiber,
An epoxy resin was used as the base material. Inner diameter 231 mm, outer diameter 27
A cylinder having a thickness of 7 mm, a wall thickness of 23 mm and a length of 180 mm was manufactured by the filament winding method. All reinforcing fibers having a wall thickness of 23 mm were arranged at ± 80 ° with respect to the axial direction. afterwards,
The outer circumference was machined to an outer diameter of 273 mm. Thereafter, circumferential winding was performed by a 1 mm thick filament winding method. The outermost 1 mm thickness was hardened to obtain a cylinder having an outer diameter of 275 mm, and then the inner surface of this cylinder was machined to 235 mm.
Epoxy adhesive (Ciba Geigy, Araldite) is applied to the outer surface of the metal cylinder and the inner surface of the fiber reinforced resin cylinder, that is, the adhesive surface, and both are adhered to each other at 80 ° C. for 12 hours.
Held for hours. A metal cylinder and a fiber-reinforced resin cylinder were integrated and machined to a length of 160 mm to obtain a container-shaped composite pipe.

"Comparative Example" The metal cylinder is made of titanium,
The thickness was 5.0 mm, the outer diameter was 235 mm, and the length was 160 mm. The fiber-reinforced resin cylinder used carbon fiber as the reinforcing fiber and epoxy resin as the base material. Inner diameter 231 mm, outer diameter 277 m
A cylinder having m, a wall thickness of 23 mm and a length of 180 mm was manufactured by the filament winding method. All reinforcing fibers having a wall thickness of 23 mm were arranged at ± 80 ° with respect to the axial direction. Then, the outer circumference was machined to have an outer diameter of 273 mm. Then, the inner surface was machined to 235 mm. An epoxy adhesive (Chirageigy Inc., Araldite) was applied to the outer surface of the metal cylinder and the inner surface of the fiber reinforced resin cylinder, that is, the adhesive surface, and both were adhered and held at 80 ° C. for 12 hours. A metal cylinder and a fiber-reinforced resin cylinder were integrated and machined to a length of 160 mm to obtain a container-shaped composite pipe.

The container-shaped rotating bodies of Examples and Comparative Examples were subjected to a rotation test in the atmosphere. The results are shown in Table 1.
In the embodiment of the present invention, there is no damage to the rotating body,
Achieved stable rotation speed of m. On the other hand, in the comparative example, the rotation speed is gradually increased from the stopped state to 23000 rpm.
The rotation speed was maintained for 15 minutes. After that, when the rotating body was observed after the rotating body stopped, as shown in FIG. 3, fiber peeling occurred from the end portion of the fiber reinforced resin cylinder. In this state, it is impossible to continue rotation. That is, the container-shaped rotating body of the comparative example could not stably realize the rotation speed of 23000 rpm.

[0019]

[Table 1]

[0020]

According to the present invention, a composite rotating body in which a fiber reinforced resin cylinder is arranged on the outer periphery of a metal cylinder, and the reinforcing fibers of the fiber reinforced resin cylinder on the outer periphery are reinforced in the circumferential direction at the outermost portion of the cylinder. Therefore, peeling does not occur at the end of the fiber reinforced resin cylinder during rotation, compared to conventional metal rotating bodies,
It is possible to achieve twice the number of rotations and four times the centrifugal force.
Furthermore, by using a metal cylinder having a bottom, a container-shaped high-speed composite rotating body can be produced, and as a result, it becomes possible to manufacture a centrifuge having a high separation performance capable of separating a large amount of liquid.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a composite rotary body according to the present invention.

FIG. 2 is a sectional view of the container-shaped composite rotating body of the present invention.

FIG. 3 is a perspective explanatory view of a container-shaped rotating body in which fiber peeling has occurred.

[Explanation of symbols]

 1 Metal Cylinder 2 Fiber Reinforced Resin Cylinder 3 Adhesive 4 Inner Part of Fiber Reinforced Resin Cylinder 5 Outermost Fiber Reinforced Resin Cylinder 6 Bottomed Metal Cylinder 7 Rotating Body Lid

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hironori Kazuma Kuma 1618 Ida, Nakahara-ku, Kawasaki-shi, Kanagawa Inside Nippon Steel Corporation Advanced Technology Research Institute (72) Kenji Kubomura 1618 Ida, Nakahara-ku, Kawasaki-shi, Kanagawa Address Nippon Steel Co., Ltd. Advanced Technology Research Laboratory (72) Inventor Osamu Yoshida 2-1-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. (72) Toshiyuki Nakajima 2-1 Toyosu, Koto-ku, Tokyo -1 Ishikawajima Harima Heavy Industries Co., Ltd. (72) Inventor Junsuke Okamura 2-1-1 Toyosu Koto-ku, Tokyo Inside 1-1 Ishikawajima Harima Heavy Industries Co., Ltd. (72) Masahiro Moriguchi 2-1 Okawa-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Mitsubishi Inside Kakoki Co., Ltd. (72) Inventor Yasutoshi Tanaka 2-1 Okawamachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Inside Mitsubishi Kakoki Co., Ltd.

Claims (1)

[Claims] 1. A cylinder made of a fiber-reinforced resin, in which a reinforcing fiber having a wall thickness of 0.1 mm or more and 50% or less of the total wall thickness is orientated in the circumferential direction in the outermost peripheral portion of the fiber-reinforced resin cylinder. Is a double-cylinder structure in which the outer periphery of a metal cylinder is closely attached.