JP2018119578A - High pressure tank manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high pressure tank manufacturing method capable of improving rigidity of a high pressure tank.SOLUTION: Mouth pieces 20 are respectively inserted in both ends of a cylindrical shell part 12. A pair of mouth pieces 20 are coupled with each other by a coupling mechanism 30 having a spring 34 and an adjustment nut 36 adjusting an energization force of the spring 34. Here, in a third step, a second fiber reinforced resin member 16 is wound once or more times to bridge between one mouth piece 20 and the other mouth piece 20, and in a fourth step, a position of the adjustment nut 36 is changed so that the energization force of the spring 34 is applied to the outside in an axial direction of the shell part 12. Also, in a fifth step, the second fiber reinforced resin member 16 is further wound. Accordingly, the second fiber reinforced resin member 16 is wound while a tension is applied, and the tension of the second fiber reinforced resin member 16 first wound is made small, so as to restrain looseness. Thus, rigidity of the high pressure tank 10 can be improved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a high-pressure tank.

  Patent Document 1 below discloses a high-pressure tank and a manufacturing method thereof. In this high-pressure tank manufacturing method, the body portion is reinforced by the fiber bundle by winding a plurality of belt-like fiber bundles on the body portion formed in a barrel shape along the substantially axial direction of the body portion. Yes. Thereby, since the rigidity of a high-pressure tank is improved, a high-pressure fluid can be accommodated inside the high-pressure tank.

JP 2010-265931 A

  However, in the high-pressure tank disclosed in Patent Document 1, the fiber bundle is wound around the body part a plurality of times, but when the fiber bundle is wound a plurality of times, the tension of the fiber bundle wound first, that is, the fiber bundle on the body part side May weaken and loosen the fiber bundle. When looseness occurs in the fiber bundle, the trunk portion cannot be reinforced with the fiber bundle, which may reduce the rigidity of the high-pressure tank. Therefore, the above prior art has room for improvement in this respect.

  In view of the above facts, the present invention has an object to obtain a method for manufacturing a high-pressure tank that can improve the rigidity of the high-pressure tank.

  The method for manufacturing a high-pressure tank according to claim 1 is formed in a cylindrical shape, and at least a part thereof is inserted into both end portions of the body portion, and a body portion having both ends in the axial direction opened. Thus, the both ends are respectively closed, and a base that is displaceable along the axial direction of the body part, and the one base and the other base are respectively connected in the axial direction of the body part. And a connecting mechanism having a biasing means for biasing each of the bases outward in the axial direction of the body part, and a biasing force adjusting means for adjusting the biasing force of the biasing means, and the one base And a fiber bundle wound around the other base in the axial direction of the body part, and a high-pressure tank manufacturing method applied to a high-pressure tank having both ends of the body part Insert the caps respectively The first base and the other base are connected to each other by the first step and the connecting mechanism in which the biasing force is not exerted on the outer side in the axial direction of the body part by the biasing force adjusting means. A second step of connecting in the direction, a third step of winding the fiber bundle around the one base and the other base at least once so as to span the axial direction of the body part, and the biasing A fourth step of adjusting the urging force adjusting means so that the urging force of the means acts on the outer side in the axial direction of the body part, and the fiber bundles on the one body and the other base. And a fifth step of further winding the wire so as to span along the axial direction of the part.

  According to the first aspect of the present invention, the body portion is formed in a cylindrical shape, and both end portions in the axial direction (hereinafter simply referred to as “axial direction”) of the body portion are opened. At least a part of the base is inserted into both ends of the part so as to close the both ends. Each base is displaceable along the axial direction, and each base is connected in the axial direction by a connecting mechanism. The coupling mechanism has urging means for urging each base outward in the axial direction, and urging force adjusting means for adjusting the urging force of the urging means. In addition, a fiber bundle is wound around each base so as to span along the axial direction.

  Here, the bases are respectively inserted into both ends of the body part in the first step, and one base and the other base are connected in the axial direction by the connection mechanism in the second step. The coupling mechanism at this time is in a state where the urging force of the urging means does not act outward in the axial direction by the urging force adjusting means. In the third step, the fiber bundle is wound at least once so as to span the one base and the other base along the axial direction of the body portion, and the biasing force of the biasing means in the fourth step The urging force adjusting means is adjusted so as to be in a state of acting on the outer side in the axial direction of the body part. Further, in the fifth step, the fiber bundle is further wound around the one base and the other base so as to be bridged along the axial direction of the body portion. Therefore, since the fiber bundle is wound around the base in a state where the tension is applied by the base urged outward in the axial direction, loosening occurs due to the tension of the fiber bundle on the side of the base wound first being weakened. Can be suppressed.

  The method for producing a high-pressure tank according to the first aspect of the present invention has an excellent effect that the rigidity of the high-pressure tank can be improved.

It is a schematic sectional drawing which shows the high pressure tank manufactured by the high pressure tank manufacturing method which concerns on one Embodiment. (A) is the schematic which shows the compression state of the urging means of the high pressure tank manufactured by the high pressure tank manufacturing method which concerns on one Embodiment, (B) is the schematic which shows a tension | pulling state with respect to (A). is there. It is a disassembled perspective view which shows a part of high-pressure tank created by the high-pressure tank manufacturing method which concerns on one Embodiment. It is a perspective view which shows the 3rd process in the high pressure tank manufacturing method which concerns on one Embodiment. It is a perspective view showing the high-pressure tank manufactured by the high-pressure tank manufacturing method concerning one embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a tank module provided in a vehicle (not shown) is configured by combining a plurality of high-pressure tanks 10. As an example, a tank module is provided on the vehicle lower side of a floor panel (not shown) of a fuel cell vehicle. A plurality of high-pressure tanks 10 are connected.

  As an example, the high-pressure tank 10 is formed in a substantially cylindrical shape having the vehicle width direction or the vehicle front-rear direction as an axial direction (longitudinal direction). The high-pressure tank 10 includes a body portion 12, a first fiber reinforced resin member 14, and a second fiber reinforced resin member 16 as a fiber bundle. The body portion 12 is formed in a cylindrical shape having both ends in the axial direction opened and is made of an aluminum alloy as an example. In addition, the trunk | drum 12 is made into the diameter dimension which can be accommodated in the vacant space of the vehicle lower side of a floor panel.

  The first fiber reinforced resin member 14 is a sheet-like CFRP (carbon fiber reinforced resin) and is wound around the outer peripheral surface 18 of the body portion 12. Inside the first fiber reinforced resin member 14, carbon fibers (not shown) are arranged along the circumferential direction of the body portion 12. In other words, the fiber direction of the first fiber reinforced resin member 14 is the circumferential direction of the body portion 12.

  A pair of caps 20 is inserted into the axially one end and the other end of the body 12 of the high-pressure tank 10. The base 20 is formed in a substantially semi-cylindrical shape that is convex outward in the axial direction. The base 20 has a body portion insertion portion 22 and a communication channel 24. The body part insertion part 22 is disposed at a position corresponding to each of the body parts 12 of the plurality of high-pressure tanks 10 and is formed in a substantially cylindrical shape protruding toward the inner side in the axial direction of the body part 12. The outer peripheral surface 18 of the trunk portion insertion portion 22 is in contact with the inner peripheral surface of the trunk portion 12. Further, a packing accommodating portion 26 formed by cutting out the outer edge portion is provided at the distal end portion of the body portion inserting portion 22, and an O-ring 28 is accommodated in the packing accommodating portion 26. The O-ring 28 is elastically deformed along the radial direction of the body portion 12. The body portion insertion portion 22 closes the end portion on the one side in the axial direction and the end portion on the other side of the body portion 12.

  The communication flow path 24 is formed inside the base 20, and the communication flow path 24 is formed in a plurality of second openings opened along the axial direction and inward in the axial direction inside the body portion insertion portion 22. The first communication flow path 25 is configured to include a second communication flow path (not shown) that connects the plurality of first communication flow paths 25 to each other. Thereby, the inside of the trunk | drum 12 of the some high pressure tank 10 is mutually connected.

  The communication channel 24 in the base 20 is provided with a valve (not shown) as a valve member so that the amount of fluid flowing in the communication channel 24 can be controlled. The communication channel 24 is connected to a fuel cell stack, a supply pipe, and the like (not shown).

  The second fiber reinforced resin member 16 is provided on the radially outer side of the first fiber reinforced resin member 14 and on the outer surfaces of the pair of caps 20. Specifically, the second fiber reinforced resin member 16 is a belt-like CFRP (carbon fiber reinforced resin), and the second fiber reinforced resin member 16 is formed on the outer surface of the pair of caps 20. It is wound so as to span along the axial direction. In the second fiber reinforced resin member 16, carbon fibers (not shown) are arranged along the axial direction of the body portion 12. In other words, the fiber direction of the second fiber reinforced resin member 16 is the axial direction of the body portion 12. The fiber amount of the second fiber reinforced resin member 16 is half of the fiber amount of the first fiber reinforced resin member 14.

  The pair of caps 20 in the high-pressure tank 10 are connected in the axial direction by a connecting mechanism 30. As shown in FIG. 3, the coupling mechanism 30 is formed between a pair of rod members 32 that are formed in a columnar shape having the axial direction as a longitudinal direction and provided along the axial direction, and the pair of rod members 32. A spring 34 as an urging means provided and a pair of adjustment nuts 36 as urging force adjusting means provided at both ends of the spring 34 are provided.

  The pair of rod members 32 are respectively provided on the upper side and the lower side of the body portion 12. The pair of rod members 32 are formed with male threads at both ends in the longitudinal direction, and the male threads at the outer ends in the axial direction are female threads in the through holes 38 formed in the base 20 (see FIG. 1). ). Further, as shown in FIGS. 2A and 2B, adjustment nuts 36 are respectively screwed into the male threads at the inner ends of the rod members 32 in the axial direction.

  End portions 40 of the springs 34 are attached to the opposing surfaces of the pair of adjustment nuts 36 so as to be relatively rotatable. As shown in FIG. 2B, the spring 34 has an inner diameter dimension larger than an outer diameter dimension of the rod member 32 so that the rod member 32 can be inserted therein. In addition, as shown in FIG. 2A, in a state where the pair of adjustment nuts 36 are positioned at the end edges of the axially inner ends of the rod members 32 (the pair of adjustment nuts 36 are close to each other). Since the spring 34 is in a compressed state, a biasing force acts on the adjustment nut 36 and the rod member 32 outward in the axial direction. On the other hand, as shown in FIG. 2 (B), the pair of adjustment nuts 36 are moved away from the end edges of the axially outer ends of the rod members 32 (the pair of adjustment nuts 36 are separated from each other). In this state, since the spring 34 is in an extended state, a biasing force acts on the adjustment nut 36 and the rod member 32 inward in the axial direction.

(High pressure tank manufacturing method)
As shown in FIG. 3, the first fiber reinforced resin member 14 is wound around the outer circumferential surface of the trunk portion 12 of the high-pressure tank 10 along the circumferential direction of the trunk portion 12 as described above. A base 20 is inserted into each of both axial ends of the body 12 around which the first fiber reinforced resin member 14 is wound. This step corresponds to the “first step” of the present invention. Each base 20 is connected in the axial direction of the body portion 12 by a rod member 32 to which an adjustment nut 36 and a spring 34 are attached. The adjustment nut 36 at this time is disposed at a position where the spring 34 on the rod member 32 is not compressed. That is, the urging force is not applied to the rod member 32 outward in the axial direction. This step corresponds to the “second step” of the present invention.

  As shown in FIG. 4, the second fiber reinforced resin member 16 is wound around the pair of caps 20 one or more times so as to be bridged along the axial direction of the body portion 12. This step corresponds to the “third step” of the present invention.

  Then, after the second fiber reinforced resin member 16 is wound one or more times so as to be bridged over the pair of caps 20, the adjustment nut 36 is moved to the edge of the end on the axially inner side of the rod member 32 (FIG. 2 (A)). This step corresponds to the “fourth step” of the present invention. As a result, the spring 34 is compressed to generate a biasing force that acts on the rod member 32 and thus the pair of caps 20 in the axially outward direction. Due to the biasing force of the spring 34, the pair of bases 20 tries to move outward in the axial direction (the direction in which the bases 20 are separated from each other), so that the second fiber reinforced resin member 16 spanned between the pair of bases 20. It is possible to suppress the occurrence of looseness.

  As shown in FIG. 5, the second fiber reinforced resin member 16 is further bridged over the pair of bases 20 so as to overlap the second fiber reinforced resin member 16 wound in the second step. It is wound along the axial direction. That is, the second fiber reinforced resin member 16 has a multilayer structure. This step corresponds to the “fifth step” of the present invention.

  After the second fiber reinforced resin member 16 is wound in multiple layers so as to be bridged between the pair of bases 20, the pair of adjustment nuts 36 are respectively moved from the end edges of the axially inner ends of the rod members 32. It is set as the state which made it the separated position (a pair of adjustment nut 36 spaces apart).

  A tank module is manufactured by arranging a plurality of high-pressure tanks 10 manufactured as described above and fixing them together.

(Operation and effect of the first embodiment)
Next, the operation and effect of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, the body portion 12 is formed in a cylindrical shape, and both end portions in the axial direction are opened, and both end portions are closed in both end portions of the body portion 12. Thus, at least a part of the base 20 is inserted. The bases 20 can be displaced along the axial direction, and the bases 20 are connected to each other in the axial direction by a connecting mechanism 30. The coupling mechanism 30 includes a spring 34 that urges each base 20 outward in the axial direction, and an adjustment nut 36 that adjusts the urging force of the spring 34. Further, the second fiber reinforced resin member 16 is wound around each base 20 so as to be bridged along the axial direction.

  Here, the bases 20 are respectively inserted into both end portions of the body 12 in the first step, and one base 20 and the other base 20 are connected in the axial direction by the connecting mechanism 30 in the second step. . The coupling mechanism 30 at this time is in a state in which the urging force of the spring 34 does not act outward in the axial direction by the adjustment nut 36. Then, in the third step, the second fiber reinforced resin member 16 is wound at least once or more around the one base 20 and the other base 20 along the axial direction of the body portion 12, and the fourth step The position of the adjustment nut 36 is changed so that the urging force of the spring 34 acts on the outer side in the axial direction of the body 12. Further, in the fifth step, the second fiber reinforced resin member 16 is further wound around the one base 20 and the other base 20 along the axial direction of the body portion 12. Therefore, since the second fiber reinforced resin member 16 is wound around the base 20 in a state where tension is applied by the base 20 biased outward in the axial direction, the second fiber reinforced resin member 16 on the side of the base 20 wound first is wound. It is possible to suppress the occurrence of loosening due to the weak tension. Thereby, the rigidity of the high-pressure tank 10 can be improved.

  In addition, after the second fiber reinforced resin member 16 is wound in multiple layers so as to be bridged between the pair of bases 20, the pair of adjustment nuts 36 are respectively connected from the end edges of the axially inner ends of the rod members 32. It is in a state where they are separated (a pair of adjusting nuts 36 are separated from each other). As a result, the spring 34 is in an extended state, and an urging force acting on the rod member 32 and thus the pair of caps 20 inward in the axial direction is generated. By the urging force of the spring 34, the pair of bases 20 tries to move inward in the axial direction (the direction in which the bases 20 are close to each other), thereby further suppressing the pair of bases 20 from being detached from the body portion 12. be able to. That is, the pressure resistance of the high-pressure tank 10 can be further improved.

  In the above-described embodiment, the coupling mechanism 30 is provided with the spring 34 and the adjustment nut 36. However, the present invention is not limited to this, and the biasing force is applied to the pair of bases 20 by other configurations such as a hydraulic damper. And it is good also as a structure which enables adjustment of urging | biasing force.

  Moreover, it is good also as a structure which can provide the load mechanism and the elongation measuring meter in the connection mechanism 30, and can measure the pressure which acts on the high pressure tank 10, and can predict degradation or destruction of the high pressure tank 10.

  Furthermore, the spring 34 and the adjustment nut 36 are provided in the approximate center in the axial direction of the coupling mechanism 30. However, the present invention is not limited to this, and the spring 34 and the adjustment nut 36 are provided at other positions such as an axial end. It is good also as a structure provided.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above, and various modifications other than those described above can be implemented without departing from the spirit of the present invention. Of course.

10 High-pressure tank 12 Body 16 Second fiber reinforced resin member (fiber bundle)
20 base 30 coupling mechanism 34 spring (biasing means)
36 Adjustment nut (bias force adjustment means)

Claims (1)

A body part that is formed in a cylindrical shape and that is open at both ends in the axial direction;
A base that closes both ends by being inserted at least partially into the both ends of the body part, and is displaceable along the axial direction of the body part;
The one base and the other base are respectively connected in the axial direction of the body part, and each of the bases is biased outward in the axial direction of the body part, and the biasing means A coupling mechanism having a biasing force adjusting means for adjusting the power;
A fiber bundle wound around the one base and the other base so as to be bridged along the axial direction of the body portion;
A high-pressure tank manufacturing method applied to a high-pressure tank having
A first step of inserting the bases into both ends of the body part;
Second connecting the one base and the other base in the axial direction of the body part by the connecting mechanism in which the biasing force is not applied to the outer side in the axial direction of the body part by the biasing force adjusting means. Process,
A third step of winding the fiber bundle around the one base and the other base at least once so as to be bridged along the axial direction of the body part;
A fourth step of adjusting the urging force adjusting means so that the urging force of the urging means acts on the outer side in the axial direction of the body portion;
A fifth step of further winding the fiber bundle around the one base and the other base so as to be bridged along the axial direction of the body part,
High pressure tank manufacturing method.