JP6266293B2 - Pressure vessel and method for manufacturing the same - Google Patents

Description

  The present invention relates to a pressure vessel that can contain a fluid having a pressure higher than atmospheric pressure, such as helium and oxygen, and a method for manufacturing the same.

  A pressure vessel that can contain a high-pressure fluid is generally configured by forming a reinforcing layer such as a fiber reinforced plastic on the outer peripheral surface of a metal liner having a base portion and having a hollow shape. In this case, the reinforcing layer is formed by a filament winding method. This filament winding method is a method in which reinforcing fibers impregnated with a resin are wound so as to intersect while applying tension to the surface of the liner, and the resin is cured and molded.

  As a conventional pressure vessel and its manufacturing method, what was described in the following patent documents 1-3 is proposed, for example.

Japanese Patent No. 4382536 Japanese Patent Publication No. 03-028301 Japanese Examined Patent Publication No. 04-037773

  By the way, as a shape of the pressure vessel, a cylindrical shape has been generally used. However, when the device on which the pressure vessel is mounted is a columnar shape, a donut-shaped pressure vessel having a hollow center may be more advantageous for mounting than a cylindrical pressure vessel. However, when manufacturing a doughnut-shaped pressure vessel, it is difficult to wind reinforcing fibers so as to cross while applying tension to the surface of the liner having a donut shape.

  This invention solves the subject mentioned above, and it aims at providing the pressure vessel which can form easily the reinforcement layer which a reinforcement fiber cross | intersects on the surface, and its manufacturing method.

  In order to achieve the above object, a pressure vessel according to the present invention comprises a metal liner having a hollow donut shape and a reinforcing fiber continuous in the circumferential direction of the liner that is hardened by a resin to cover the outside of the liner. And a second reinforcing layer covering the outside of the liner as a plurality of precured members in which reinforcing fibers continuous in the axial direction of the liner are hardened by a resin.

  Accordingly, the first reinforcing layer is formed by winding and curing the reinforcing fibers in the circumferential direction of the liner, while the reinforcing fibers continuous in the axial direction of the liner are previously cured to form a pre-curing member. Since the second reinforcing layer is formed by covering the outside of the liner, two reinforcing layers intersecting with the reinforcing fibers can be easily formed.

  The pressure vessel of the present invention is characterized in that two or more reinforcing layers intersecting in the direction in which the reinforcing fibers are continuous are laminated.

  Therefore, the pressure resistance of the pressure vessel can be improved by forming two or more reinforcing layers intersecting with the reinforcing fibers.

  In the pressure vessel of the present invention, the second reinforcing layer has a ring shape continuous in the axial direction of the liner and is composed of at least two precure members divided in the circumferential direction.

  Therefore, the surface of the liner can be properly covered with two pre-curing members in which the reinforcing fibers are continuous in the circumferential direction of the liner. In this case, by using two pre-curing members, the manufacturability and the assembling property are improved. be able to.

  In the method of manufacturing a pressure vessel according to the present invention, the reinforcing fiber impregnated with resin in the circumferential direction of the liner is continuously wound around the surface of a metal liner having a hollow donut shape, and then cured to be first strengthened. A step of forming a layer, a step of manufacturing a plurality of precured members in which reinforcing fibers are continuous in the axial direction of the liner by winding reinforcing fibers impregnated with resin on a jig, and then curing the reinforcing fibers; and first of the liner Forming a second reinforcing layer by covering the surface of the reinforcing layer with the plurality of pre-curing members and then curing the surface.

  Accordingly, the first reinforcing layer is formed by wrapping the reinforcing fiber in the circumferential direction of the liner and curing it, while the reinforcing fiber continuous in the axial direction of the liner is pre-cured to form a pre-curing member. Since the second reinforcing layer is formed by covering the outside of the liner, two reinforcing layers intersecting with the reinforcing fibers can be easily formed.

  Further, the method of manufacturing a pressure vessel of the present invention includes a step of manufacturing a plurality of precure members in which the reinforcing fibers are continuous in the axial direction of the liner by winding the reinforcing fibers impregnated with the resin around the jig and then curing the reinforcing fibers. A step of forming a second reinforcing layer by coating a surface of a metal liner having a hollow donut shape with the plurality of precure members and then curing the surface; and a surface of the liner on the surface of the second reinforcing layer of the liner. A reinforcing fiber impregnated with a resin in a direction is continuously wound and then cured to form a first reinforcing layer.

  Therefore, the reinforcing fibers continuous in the axial direction of the liner are pre-cured to form a pre-curing member, and the second reinforcing layer is formed by covering the outside of the liner with this pre-curing member, while reinforcing in the circumferential direction of the liner. Since the first reinforcing layer is formed by winding and curing the fibers, it is possible to easily form two reinforcing layers where the reinforcing fibers intersect.

  According to the pressure vessel and the manufacturing method thereof of the present invention, two reinforcing layers in which reinforcing fibers intersect can be easily formed on the outside of a liner having a hollow donut shape.

FIG. 1 is a partially cutaway schematic view showing a pressure vessel according to an embodiment of the present invention. FIG. 2 is a flowchart showing the procedure of the pressure vessel manufacturing method of the present embodiment. FIG. 3 is a schematic view showing a method for manufacturing the pressure vessel of the present embodiment. FIG. 4 is a schematic view showing a method for manufacturing the pressure vessel of the present embodiment. FIG. 5 is a schematic view showing a method for manufacturing the pressure vessel of the present embodiment. FIG. 6 is a schematic view illustrating a method for manufacturing a pressure vessel according to the present embodiment. FIG. 7 is a schematic view showing a method for manufacturing the pressure vessel of the present embodiment.

  Exemplary embodiments of a pressure vessel and a method for manufacturing the same according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a partially cutaway schematic view showing a pressure vessel according to one embodiment of the present invention, FIG. 2 is a flowchart showing the procedure of the pressure vessel manufacturing method of this embodiment, and FIGS. It is the schematic showing the manufacturing method of the pressure vessel of an example.

  The pressure vessel of the present embodiment is filled with fluid and has a donut shape. In this case, since the central part of the pressure vessel having a donut shape is hollow, various devices can be arranged here. In addition, a plurality of pressure vessels having a donut shape can be stacked and used in communication with each other. Note that the fluid filled in the pressure vessel includes helium, hydrogen, oxygen, and the like that can be used as a working fluid or fuel.

  In this embodiment, as shown in FIG. 1, the pressure vessel 10 includes a liner 11 made of metal having a hollow donut shape and reinforcing fibers continuous in the circumferential direction B of the liner 11 are cured with resin. A first reinforcing layer 12 covering the outer side of the liner 11 and a second reinforcing layer 12 covering the outer side of the liner 11 (first reinforcing layer 12) as a plurality of pre-cured members in which reinforcing fibers continuous in the axial direction A of the liner 11 are cured by resin. The reinforcing layer 13 and the third reinforcing layer 14 that is formed by curing the reinforcing fibers continuous in the circumferential direction B of the liner 11 with the resin and covering the outer side of the liner 11 (second reinforcing layer 13).

  In addition, the axial direction A mentioned above is a direction along the circumference since the pressure vessel 10 has a hollow portion in the center and the main body has a donut shape (ring shape) continuous in the circumferential direction. . Further, the circumferential direction B is a direction along the outer circumferential direction in this circular cross section because the cross section orthogonal to (crossing) the axial direction A of the pressure vessel 10 forms a substantially circular cross section (meridian plane).

  The liner 11 is made of a metal material such as titanium or aluminum, and two holes 21 and 22 are formed in the upper portion. The holes 21 and 22 are used as a supply port for supplying fluid to the inside or a discharge port for discharging the fluid inside. The number of the holes 21 and 22 may be one or three or more.

  The first reinforcing layer 12 is to reinforce the prepreg as a reinforcing fiber by winding the prepreg around the outer peripheral surface of the liner 11 along the circumferential direction B, and then curing the prepreg to cover the outer side of the liner 11. Here, the prepreg is formed by impregnating a resin (epoxy resin, etc.) into a strip-like or strip-like carbon fiber strip with carbon fibers (or glass fibers) aligned in the same direction and semi-curing it. is there.

  The second reinforcing layer 13 forms a plurality of pre-curing members by winding the reinforcing fibers around the jig along the axial direction A of the liner 11 with a predetermined tension using a filament winding method, and then curing each of the pre-curing members. The liner 11 is reinforced by covering the outside of the first reinforcing layer 12 with a member. In the present embodiment, the second reinforcing layer 13 has a ring shape continuous in the axial direction A of the liner 11 and is composed of four precure members divided into four in the circumferential direction B.

  Here, the filament winding method is a method in which one to several tens of wire-like carbon fibers are drawn, wound around a rotating jig (mold / mandrel, etc.) while impregnated with resin (epoxy resin, etc.), and then cured. This is a molding method in which the mold is removed after being removed. The pre-cure member is obtained by curing a carbon fiber wound around a jig with a resin in the above-described forming process by the filament winding method.

  The third reinforcing layer 14 is formed by winding a prepreg as a reinforcing fiber around the outer peripheral surface of the second reinforcing layer 13 along the circumferential direction B, and then curing the prepreg to cover and strengthen the outer side of the second reinforcing layer 13. Is. Here, the third reinforcing layer 14 has the same reinforcing fiber arrangement as the first reinforcing layer 12.

  Here, the manufacturing method of the pressure vessel of a present Example is demonstrated using the flowchart of FIG. 2, and the schematic of FIG. 3 thru | or FIG.

  As shown in FIG. 2, the pressure vessel manufacturing method of the present embodiment includes a step of manufacturing a metal liner 11 having a hollow donut shape (S 11), and a surface of the liner 11 in the circumferential direction B of the liner 11. Steps (S12 to S14) of forming the first reinforcing layer 12 by continuously winding the prepreg impregnated with the resin and then curing it, and reinforcing the jig by winding the reinforcing fiber impregnated with the resin and then curing it. A step (S21 to S23, S31 to S33) of manufacturing a plurality of precure members in which fibers are continuous in the axial direction A of the liner 11, and the surface of the first reinforcing layer 12 of the liner 11 is covered with a plurality of precure members. Steps (S41 to S42) for forming the second reinforcing layer 13 by curing, and a prepreg in which the surface of the second reinforcing layer 13 of the liner 11 is impregnated with resin in the circumferential direction B of the liner 11 It is constructed from a step of forming a third reinforcing layer 14 is cured after being wrapped in succession (S43 to S45).

  That is, first, in step (S11), a liner 11 having a hollow donut shape is manufactured using titanium or another material, and two holes 21 and 22 are formed in the upper part. Next, as shown in FIG. 3, in step (S12), the prepreg 31 is cut (cut) to a predetermined width, and in step (S13), the prepreg 31 having a predetermined width is formed around the outer peripheral surface of the liner 11. Wrapping along the direction B, actually along the spiral direction with no gap. Then, in the step (S14), the first reinforced layer 12 that covers the outer side of the liner 11 is formed by curing the resin of the prepreg 31 on the entire surface.

  In step (S21), as shown in FIG. 4, the carbon fiber tow 42 is spirally wound around the arc surface of the first jig 41 with a predetermined tension, and in step (S22), the first jig 41 The two precure members 43a constituting the second reinforcing layer 13 are formed by curing the carbon fiber tow 42 wound around the surface with a resin, and removing and trimming / finishing in step (S23). 43b is formed. Further, in step (S31), as shown in FIG. 5, the carbon fiber tow 42 is spirally wound around the arc surface of the second jig 44 with a predetermined tension, and in step (S32), the second jig 44 The two precure members 45a constituting the second reinforcing layer 13 are formed by curing the carbon fiber tow 42 wound around the surface with a resin, removing the mold and trimming / finishing in step (S33). 45b is formed.

  In this case, the precure members 43 a and 43 b have the same shape and are formed corresponding to the inner peripheral surface side of the liner 11. On the other hand, the precure members 45 a and 45 b have the same shape and are formed corresponding to the outer peripheral surface side of the liner 11. That is, the four precure members 43 a, 43 b, 45 a, 45 b are divided into four in the arc direction B of the liner 11 so as to cover the outer side of the liner 11. Therefore, the winding surface of the carbon fiber tow 42 in the first jig 41 is formed in a curved surface similar to the inner peripheral surface of the liner 11, and the winding surface of the carbon fiber tow 42 in the second jig 44 is the outer peripheral surface of the liner 11. It is formed on the same curved surface.

  In step (S41), as shown in FIG. 6, the pre-curing members 43a and 45a are mounted from above the liner 11 on which the first reinforcing layer 12 is formed, while the pre-curing members 43b and 45b are mounted from below and bonded. Glue with the agent. Then, in the step (S42), the outer side of the liner 11 (first reinforcing layer 12) is covered by adhesively curing the liner 11 with the precure members 43a, 43b, 45a, 45b attached to the surface. The second reinforcing layer 13 is formed.

  In the step (S43), as shown in FIG. 7, the prepreg 31 having a predetermined width is arranged along the circumferential direction B on the outer circumferential surface of the liner 11 (second reinforcing layer 13), and actually along the spiral direction without a gap. Wrap it. Then, in the step (S44), the third reinforcing layer 14 that covers the outer side of the liner 11 is formed by curing the liner 11 having the prepreg 31 wound around the entire surface. Then, the pressure vessel 10 is manufactured by performing a finishing process in a process (S45).

  As described above, in the pressure vessel according to the present embodiment, the metal liner 11 having a hollow donut shape and the prepreg 31 along the circumferential direction B of the liner 11 are cured by the resin to cover the outer side of the liner 11. The outer side of the liner 11 (first reinforcing layer 12) is formed as a plurality of pre-curing members 43a, 43b, 45a, 45b in which the first reinforcing layer 12 and the carbon fiber tows 42 along the axial direction A of the liner 11 are cured by resin. A second reinforcing layer 13 to be covered is provided.

  Accordingly, the prepreg 31 is wound around the circumferential direction B of the liner 11 to form the first reinforcing layer 12, while the carbon fiber tow 42 is pre-cured along the axial direction A of the liner 11 to pre-cure members 43 a and 43 b. , 45a, 45b, and the second reinforcing layer 13 is formed by covering the outside of the liner 11 with the precure members 43a, 43b, 45a, 45b. 13 can be formed easily.

  When forming at least two reinforcing layers 12 and 13 in which carbon fibers intersect on the surface of the liner 11, the belt-like carbon fibers are wound along the circumferential direction B of the liner 11, but are along the axial direction A of the liner 11. It is difficult to wrap. That is, the carbon fiber can be wound around the outer periphery of the liner 11 along the axial direction A with a predetermined tension, but the carbon fiber along the axial direction A with a predetermined tension can be wound around the inner periphery of the liner 11. Cannot be wrapped. In the present embodiment, by using the precure members 43a, 43b, 45a, and 45b, at least two reinforcing layers 12 and 13 in which carbon fibers intersect the axial direction A and the circumferential direction B are formed on the surface of the liner 11. Can do.

  In the pressure vessel of the present embodiment, the first reinforcing layers 12 and 13 are provided on the surface of the liner 11, the second reinforcing layer 13 is provided on the surface of the first reinforcing layer 12, and the second reinforcing layer 13 is provided on the surface of the second reinforcing layer 13. A third reinforcing layer 14 having the same carbon fiber arrangement as that of the first reinforcing layer 12 is provided. Therefore, the pressure resistance of the pressure vessel 10 can be improved by forming the three reinforcing layers 12, 13, and 14 where the carbon fibers intersect.

  In the pressure vessel of the present embodiment, the second reinforcing layer 13 has a ring shape continuous in the axial direction A of the liner 11 and is divided into four precure members 43a, 43b, 45a, 45b divided in the circumferential direction B. Is provided. Accordingly, the surface of the liner 11 can be properly covered with the four pre-curing members 43a, 43b, 45a, 45b in which the carbon fiber is continuous in the axial direction A of the liner 11, and the four pre-curing members 43a, 43b, 45a, By using 45b, manufacturability and assembly can be improved.

  In the pressure vessel manufacturing method of the present embodiment, the step (S11) of manufacturing a metal liner 11 having a hollow donut shape, and the prepreg 31 in the circumferential direction B on the surface of the liner 11 are continuously performed. The step of forming the first reinforcing layer 12 by winding after winding (S12 to S14), and the carbon fiber tow 42 is continuously wound in the axial direction A by winding the carbon fiber tow 42 around the first jig 41 and then hardening it. A step (S21 to S23, S31 to S33) of manufacturing a plurality of precuring members 43a, 43b, 45a, 45b, and a surface of the first reinforcing layer 12 of the liner 11 by a plurality of precuring members 43a, 43b, 45a, 45b. Steps (S41 to S42) for forming the second reinforcing layer 13 by coating and curing, and a prepreg in the circumferential direction B on the surface of the second reinforcing layer 13 of the liner 11 Constitute from the step of forming a third reinforcing layer 14 is cured after being wrapped in succession 1 (S43 to S45).

  Therefore, the first reinforcing layer 12 is formed by winding and curing the carbon fiber tow 42 in the circumferential direction B of the liner 11, while the carbon fiber tow 42 is pre-cured in the axial direction A of the liner 11 and precuring member 43 a. , 43b, 45a, 45b, and the second reinforcing layer 13 is formed by covering the outside of the liner 11 with the precure members 43a, 43b, 45a, 45b. 12 and 13 can be formed easily, and the manufacturing process can be simplified.

  In the above-described embodiment, the three reinforcing layers 12, 13, and 14 are formed on the outside of the liner 11. However, the number is not limited to this number, and two reinforcing layers arranged in the direction in which the reinforcing fibers intersect each other. There may be two layers or two or more layers.

  In the above-described embodiment, the second reinforcing layer 13 is provided with four precure members 43a, 43b, 45a, and 45b that are formed in a ring shape continuous in the axial direction A of the liner 11 and divided in the circumferential direction B. However, the division position and the number of divisions of each precure member are not limited to the embodiment. Alternatively, a precure member having the same shape capable of covering the outer side of the liner 11 may be integrally formed using a mold, and then divided and divided.

  In the above-described embodiment, the prepreg 31 is wound around the surface of the liner 11 in the circumferential direction B and then cured to form the first reinforcing layer 12, and the four precure members 43 a, 43 b, 45 a, and 45 b are formed on the outside thereof. The second reinforcing layer 13 is formed by curing after mounting, and the third reinforcing layer 14 is formed by winding the prepreg 31 around the outer side in the circumferential direction B and then curing to form the third reinforcing layer 14. Absent. For example, four precure members 43a, 43b, 45a, 45b are attached to the surface of the liner 11 and cured to form a second reinforcing layer, and the prepreg 31 is wound around the outer circumferential direction B and then cured. One reinforcing layer may be formed.

  The pressure vessel and the manufacturing method thereof according to the present invention can be easily provided with a plurality of reinforcing layers arranged in the direction in which the reinforcing fibers intersect on the outside of the liner, and can be applied to any pressure vessel. be able to.

DESCRIPTION OF SYMBOLS 10 Pressure vessel 11 Liner 12 1st reinforcement layer 13 2nd reinforcement layer 14 3rd reinforcement layer 31 Prepreg (reinforced fiber)
42 Carbon fiber tow (reinforced fiber)
43a, 43b, 45a, 45b Precure member

Claims (5)

A metal liner in the shape of a hollow donut,
A first reinforcing layer in which reinforcing fibers continuous in the circumferential direction of the liner are cured by a resin and coat the outside of the liner;
A second reinforcing layer that covers the outer side of the liner as a plurality of precured members in which reinforcing fibers continuous in the axial direction of the liner are cured by a resin;
A pressure vessel comprising:   2. The pressure vessel according to claim 1, wherein two or more reinforcing layers intersecting in a continuous direction of the reinforcing fibers are laminated.   3. The pressure vessel according to claim 1, wherein the second reinforcing layer has a ring shape that is continuous in an axial direction of the liner and includes at least two precure members that are divided in the circumferential direction. 4. . Forming a first reinforcing layer by continuously winding a reinforcing fiber impregnated with resin in the circumferential direction of the liner on the surface of a metal liner having a hollow donut shape;
A step of producing a plurality of precure members in which the reinforcing fibers are continuous in the axial direction of the liner by winding the reinforcing fibers impregnated with the resin around the jig and curing them;
Forming a second reinforcing layer by coating the surface of the first reinforcing layer of the liner with the plurality of precure members and then curing the surface;
A method for producing a pressure vessel, comprising: A step of manufacturing a plurality of precure members in which the reinforcing fibers are continuous in the axial direction of a metal liner having a hollow donut shape by winding the reinforcing fibers impregnated with the resin around the jig and curing them;
Forming a second reinforcing layer by coating the surface of the liner with the plurality of pre-curing members and then curing the surface;
A step of continuously winding reinforcing fibers impregnated with resin in the circumferential direction of the liner on the surface of the second reinforcing layer of the liner and then curing the reinforcing fibers to form a first reinforcing layer;
A method for producing a pressure vessel, comprising:

Images