JP2019056396A - High pressure vessel - Google Patents

Abstract

To obtain a high pressure vessel for restraining detachment of a sealing member when width of the vessel is made large together with a rise of internal pressure of the high pressure vessel.SOLUTION: A high pressure vessel 10 comprises: a body part 14 that is formed into a cylindrical shape, and is opened at an end on at least one side of an axial direction; a mouthpiece 22 inserted in the body part 14 to block an opening; a sealing member 50 for blocking between the body part 14 and the mouthpiece 22 in a radial direction of the body part 14; and a backup ring 60 provided adjacent to the sealing member 50 outside the body part 14 in the axial direction. The backup ring 60 includes a first protrusion part 64 provided inward in the axial direction of the body part 14 and outward in the radial direction, and displaced toward the body part 14 when the sealing member 50 is in contact with it.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a high pressure vessel.

  Patent Document 1 listed below discloses a high-pressure hydrogen tank. The high-pressure hydrogen tank includes a liner formed in a barrel shape and a reinforcing layer wound around the liner and made of a fiber reinforced resin. With this configuration, the rigidity of the liner is enhanced, so that high-pressure hydrogen can be accommodated therein.

JP 2002-188794 A

  By the way, in the high-pressure hydrogen tank disclosed in Patent Document 1, in order to ensure sealing performance, both ends of the liner are configured to fit the base of the tank from the inside. On the other hand, in a high-pressure hydrogen tank, it is possible to reduce the cost by forming the liner into a cylindrical shape by a molding method such as extrusion, and sealing it with a base, but in this case, there is hydrogen between the liner and the base. It is necessary to provide a seal member so as not to leak. Here, since the internal pressure from hydrogen acts in the high-pressure hydrogen tank, the liner may be widened unless the liner is reinforced with a plurality of reinforcing layers. And when a liner is widened, the clearance gap between a liner and a nozzle | cap | die will spread, and there exists a possibility that a sealing member may drop | omit.

  In view of the above facts, an object of the present invention is to obtain a high-pressure container that suppresses the dropout of the seal member when the container is widened as the internal pressure of the high-pressure container increases.

  The high-pressure vessel according to the first aspect of the present invention is formed in a cylindrical shape, and has a trunk portion that is open at least on one end in the axial direction, and the opening is inserted into the trunk portion. A base that is closed, a seal member that closes the gap between the body and the base in the radial direction of the body, and a backup provided adjacent to the seal member on the outside in the axial direction of the body. The ring and the backup ring are provided with an axially inner side and a radially outer side of the body part, and a protrusion that is displaced toward the body part when the seal member comes into contact therewith.

  The high-pressure vessel according to the invention described in claim 1 is provided with a body portion formed in a cylindrical shape as a liner constituting the vessel. A base that closes the opening by being inserted is provided at an opened end of at least one side in the axial direction of the body. Further, a seal member is provided between the body portion and the base in the radial direction of the body portion, and the seal member seals between the body portion and the base. Therefore, the fluid accommodated in the body portion does not leak from between the body portion and the base.

  A backup ring is provided on the outer side in the axial direction of the body part with respect to the seal member. Projections are provided on the seal member side and the body part side of the backup ring, that is, on the inner side in the axial direction and the outer side in the radial direction of the body part. Here, when the internal pressure of the high-pressure vessel rises and the body portion widens, the gap between the body portion and the base increases in the radial direction of the body portion. However, in the high-pressure vessel according to the present invention, the seal member hits the backup ring. By contacting, the projecting portion is displaced to the body portion side. That is, since the backup ring also expands in accordance with the widening of the gap between the body portion and the base, it is possible to suppress the seal member from dropping from the gap between the body portion and the base corresponding to the liner.

  According to the present invention, it is possible to suppress the dropout of the seal member when the container is widened as the internal pressure of the high pressure container is increased.

It is an expanded sectional view which shows the state which looked at the state which cut | disconnected the principal part of the high pressure container which concerns on this embodiment along the axial direction from the vehicle side surface. It is an expanded sectional view which shows the state cut | disconnected along the AA in FIG. It is a high-pressure container concerning this embodiment, and is an expanded sectional view of a seal member and a backup ring. FIG. 6 is a cross-sectional view illustrating the operation of a backup ring, which is a high-pressure container according to the present embodiment.

  Hereinafter, an embodiment of the high-pressure vessel 10 according to the present invention will be described with reference to FIGS. In these figures, the arrow FR indicates the vehicle front side, the arrow OUT indicates the vehicle width direction outside, and the arrow UP indicates the vehicle upper side.

(Basic configuration)
As shown in FIG. 2, the tank module 12 is configured by combining a plurality of high-pressure vessels 10. As an example, the tank module 12 is disposed on the vehicle lower side of a floor panel (not shown) of the fuel cell vehicle. As an example, the high-pressure vessel 10 of this embodiment contains hydrogen, which is a fluid.

  As shown in FIG. 1, the high-pressure vessel 10 is formed in a substantially cylindrical shape whose axial direction (longitudinal direction) is the vehicle front-rear direction as an example. The high-pressure container 10 includes a body portion 14, a first fiber reinforced resin member 16, and a second fiber reinforced resin member 18 as a reinforcing material. The body portion 14 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 14 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 16 is configured by winding a sheet-like CFRP (carbon fiber reinforced resin) around the outer peripheral surface 20 of the body portion 14. Inside the first fiber reinforced resin member 16, carbon fibers (not shown) are arranged along the circumferential direction of the body portion 14. In other words, the fiber direction of the first fiber reinforced resin member 16 is the circumferential direction of the body portion 14.

  As shown in FIG. 2, a plurality of body portions 14 of the high-pressure vessel 10 around which the first fiber reinforced resin member 16 is wound are disposed adjacent to each other in the vehicle width direction. End portions on one side in the axial direction (vehicle rear side) of the body portions 14 of the plurality of high-pressure containers 10 are arranged so as to be substantially in the same position in the vehicle front-rear direction. A base 22 is inserted into the end portion on one axial side of the plurality of body portions 14. The base 22 can be displaced relative to the body portion 14 along the axial direction. Although not shown, the end on the other axial side (vehicle front side) of the body portion 14 of the plurality of high-pressure vessels 10 is the vehicle longitudinal direction, similarly to the end portion on the one axial side of the body portion 14. And are arranged so as to be substantially the same position. A base 22 is inserted into the end portion on the other axial side of the body portion 14 so as to be relatively movable along the axial direction.

  Hereinafter, the state of the body portion 14 and the base 22 on the vehicle rear side will be described. Here, unless otherwise specified, the “axial direction” will be described as the axial direction in the body portion 14, and the “radial direction” will be described as the radial direction in the body portion 14. Further, on the vehicle rear side of the body portion 14, the outer side in the axial direction of the body portion 14 corresponds to the rear side of the vehicle, and the inner side in the axial direction corresponds to the front side of the vehicle.

  As shown in FIGS. 1 and 2, the base 22 is formed in a substantially semi-cylindrical shape having a longitudinal direction in the vehicle width direction and a curved surface on the outer side in the axial direction. The base 22 includes a body portion insertion portion 24 that is inserted into the body portion 14, and a communication channel 26 that is formed inside the base 22. The body portion insertion portion 24 is disposed at a position corresponding to each of the body portions 14 of the plurality of high-pressure containers 10 and is formed in a substantially cylindrical shape protruding toward the inner side in the axial direction (see FIG. 2). . Further, a packing accommodating portion 30 formed by cutting out an outer edge portion is provided at the distal end portion of the body portion inserting portion 24, and a packing 32 is accommodated in the packing accommodating portion 30. The structure of the packing 32 will be described later.

  The communication channel 26 is formed inside the base 22. The communication channel 26 includes a plurality of first communication channels 26A opened in the axial direction and inward in the axial direction inside the body portion insertion portion 24, and a plurality of first communication channels 26A. A second communication channel 26B (see FIG. 2) connected in the vehicle width direction is included. By the communication channel 26, the interiors of the body portions 14 of the plurality of high-pressure containers 10 are communicated with each other.

  The second fiber reinforced resin member 18 is provided on the outer surfaces of the first fiber reinforced resin member 16 and the base 22. Specifically, the second fiber reinforced resin member 18 is a sheet-like CFRP (carbon fiber reinforced resin) as with the first fiber reinforced resin member 16. The second fiber reinforced resin member 18 is integrally wound around the outer surface along the axial direction. Inside the second fiber reinforced resin member 18, carbon fibers (not shown) are arranged along the axial direction. In other words, the fiber direction of the second fiber reinforced resin member 18 is the axial direction of the body portion 14. The fiber amount of the second fiber reinforced resin member 18 is half the fiber amount of the first fiber reinforced resin member 16.

  A valve 48 (see FIG. 2) is provided in the communication channel 26 in the base 22 so that the amount of fluid flowing in the communication channel 26 can be controlled. The communication channel 26 is connected to a fuel cell stack, a supply pipe, etc. (not shown).

(Packing)
FIG. 3 shows a case where the high pressure vessel 10 is filled with fluid or the internal pressure of the high pressure vessel 10 is low. As shown in FIG. 3, the packing 32 includes a seal member 50, an O-ring 34, and a backup ring 60. All of the seal member 50, the O-ring 34, and the backup ring 60 are formed in an annular shape around the axis of the body portion 14.

  The seal member 50 is a substantially C-shaped resin member having a cross section orthogonal to the circumferential direction opened inward in the axial direction. The seal member 50 includes a seal body 52, a first abutment wall 54, and a second abutment wall 56. The seal member 50 closes the space between the body portion 14 and the base 22. The shape of the seal member 50 is not limited to a substantially C shape, and may be a substantially U shape having a corner or a substantially U shape in which an opening is widened toward the inner side in the axial direction.

  The seal main body portion 52 is provided from the side wall 46 in the packing accommodating portion 30 of the base 22 to the inner wall 42 of the body portion 14 in a cross-sectional view orthogonal to the circumferential direction. On the outer side in the axial direction of the seal main body 52, a flat surface 52A orthogonal to the axis of the body part 14 is provided at the radial center. Further, on both ends in the radial direction of the flat surface 52A, inclined surfaces 52B that are inclined inward in the axial direction toward the radially outer side or the inner side are respectively provided.

  The first abutting wall portion 54 extends toward the inner side in the axial direction on the radially outer side (the body portion 14 side) of the seal main body portion 52. The second abutting wall portion 56 is disposed on the radially inner side with respect to the first abutting wall portion 54 so as to face the first abutting wall portion 54, and at the radially inner side of the seal body portion 52. Are extended toward the inside in the axial direction. As described above, the seal member 50 has a substantially C-shape opening inward in the axial direction by the seal main body portion 52, the first contact wall portion 54, and the second contact wall portion 56 in a cross section orthogonal to the circumferential direction. It is said that.

  The radially outer side surface 40 of the first abutting wall portion 54 is in contact with the inner wall 42 of the body portion 14, and the radially inner side surface 44 of the second abutting wall portion 56 is a base. 22 is in contact with the side wall 46 of the packing accommodating portion 30. Here, the O-ring 34 is accommodated in the space formed by the seal main body portion 52, the first contact wall portion 54, and the second contact wall portion 56 (inside the opening opened inward in the axial direction). The housing portion 58 is provided.

  The O-ring 34 is a rubber ring having a circular cross section perpendicular to the circumferential direction. Here, since the outer diameter of the circular cross section of the O-ring 34 is larger than the radial width of the accommodating portion 58, the O-ring 34 is pressed into the accommodating portion 58 of the seal member 50. ing. That is, before the high pressure vessel 10 is filled with fluid and before the internal pressure of the high pressure vessel 10 rises, the O-ring 34 biases the first abutting wall portion 54 toward the inner wall 42 side of the body portion 14. At the same time, the second contact wall portion 56 is urged toward the side wall 46 of the base 22. That is, the outer surface 40 of the first contact wall portion 54 of the seal member 50 is maintained in contact with the inner wall 42 of the body portion 14 regardless of the pressure of the fluid stored in the high pressure container 10. Yes. Further, the inner side surface 44 of the second contact wall portion 56 in the seal member 50 is kept in contact with the side wall 46 of the packing housing portion 30 of the base 22. The O-ring 34 may be a material that has moderate friction with the seal member 50. For example, the O-ring 34 may be made of resin instead of rubber.

  The backup ring 60 is a resin member provided adjacent to the seal member 50 on the outer side in the axial direction. The backup ring 60 includes a ring main body 62, a first protrusion 64 as a protrusion, and a second protrusion 66 as another protrusion.

  The ring main body 62 has a substantially rectangular cross section perpendicular to the circumferential direction, and is provided from the side wall 46 of the packing housing portion 30 of the base 22 to the inner wall 42 of the body portion 14.

  The first projecting portion 64 has a substantially triangular cross section perpendicular to the circumferential direction, and extends inward in the axial direction on the radially outer side of the ring body portion 62 (on the body portion 14 side). The first projecting portion 64 is formed to be displaceable on the outer side in the radial direction of the ring body portion 62 (on the body portion 14 side).

  The second protrusion 66 is disposed radially inward of the first protrusion 64 so as to face the first protrusion 64, and has a substantially triangular cross section perpendicular to the circumferential direction. The portion 62 extends inward in the axial direction on the radially inner side of the portion 62. The second protrusion 66 is formed so as to be displaceable inward in the radial direction of the ring main body 62.

  The backup ring 60 formed as described above is in contact with the seal member 50. Specifically, the ring main body 62 contacts the flat surface 52A, the first protrusion 64 contacts the radially outer inclined surface 52B, and the second protrusion 66 contacts the radially inner inclined surface 52B. .

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, at the open end of at least one side in the axial direction of the cylindrical body portion 14, the opening is closed and displaceable along the axial direction. A base 22 is provided. Further, a seal member 50 is provided between the base 22 and the body portion 14 in the radial direction. Here, in the present embodiment, the O-ring 34 is press-fitted into the accommodating portion 58 of the seal member 50. As shown in FIG. 3, in the seal member 50, the first contact wall portion 54 is pressed against the inner wall 42 of the body portion 14 by the O-ring 34, and the second contact wall portion 56 is the side wall 46 of the base 22. It is pressed against. Thereby, the outer surface 40 of the first contact wall portion 54 is maintained in contact with the inner wall 42 of the body portion 14, and the inner surface 44 of the second contact wall portion 56 is brought into contact with the side wall 46 of the base 22. The abutted state is maintained.

  Here, when the pressure of the fluid stored in the body portion 14 is increased, the O-ring 34 is pressed against the seal body portion 52 by the fluid, as shown in FIG. The O-ring 34 further presses the first contact wall portion 54 of the seal member 50 against the inner wall 42 of the body portion 14 and further presses the second contact wall portion 56 against the side wall 46 of the base 22.

  Further, the seal member 50 of the present embodiment is opened inward in the axial direction by the seal body 52, the first contact wall 54, and the second contact wall 56 in a cross section orthogonal to the circumferential direction. It is substantially C-shaped. Here, when the pressure of the fluid stored in the body portion 14 increases, the fluid presses the first contact wall portion 54 of the seal member 50 against the inner wall 42 of the body portion 14 and the second contact wall portion 56. Is pressed against the side wall 46 of the base 22.

  As described above, in the present embodiment, when the pressure of the fluid stored in the body portion 14 increases, the first abutting wall portion 54 is pressed against the inner wall 42 by the action of the O-ring 34 and the fluid itself, and the second contact The contact wall 56 is pressed against the side wall 46. Thereby, it is suppressed that a fluid leaks from between the trunk | drum 14 and the nozzle | cap | die 22.

  By the way, in the high pressure vessel 10 of this embodiment, when the pressure of the fluid accommodated in the body part 14 rises, the body part 14 may swell in the radial direction, that is, the diameter may be increased (widened). As shown in FIG. 4, when the diameter of the body portion 14 is increased, the gap between the body portion 14 and the base 22 is widened. As described above, the first abutting wall portion 54 is pressed against the inner wall 42 and the second abutting wall portion 56 is pressed against the side wall 46 by the action of the O-ring 34 and the fluid itself. That is, the first abutting wall portion 54 and the second abutting wall portion 56 follow the enlarged diameter of the body portion 14 and close the gap between the body portion 14 and the base 22, so that fluid leakage is suppressed.

  On the other hand, when the body part 14 is expanded in diameter and the gap between the body part 14 and the base 22 is widened, the following problem occurs. That is, when the backup ring 60 is not included in the packing 32, when the seal member 50 and the O-ring 34 are strongly pressed toward the outside in the axial direction by the pressure of the fluid, the packing 32 passes through the gap between the body portion 14 and the base 22. There is a risk that the container 30 may fall off.

  On the other hand, in this embodiment, the backup ring 60 is provided adjacent to the seal member 50 on the outer side in the axial direction. As described above, in the present embodiment, the ring main body 62 of the backup ring 60 contacts the flat surface 52A of the seal member 50, the first protrusion 64 contacts the radially outer inclined surface 52B, and the second protrusion. The portion 66 is in contact with the radially inner inclined surface 52B. The first protrusion 64 is formed to be displaceable radially outward (toward the body part 14) of the ring main body 62, and the second protrusion 66 is formed to be displaceable radially inward of the ring main body 62. Yes. The backup ring 60 configured as described above has the following effects.

  As shown in FIG. 4, when the pressure of the fluid accommodated in the body portion 14 is increased, the seal member 50 is pressed by the fluid directly or through the O-ring 34 outward in the axial direction. Then, the seal member 50 presses the backup ring 60. As a result, in the backup ring 60, the ring body 62 is compressed and deformed, the first protrusion 64 is displaced radially outward (to the body part 14) of the ring body 62, and the second protrusion 66 is The ring body 62 is displaced inward in the radial direction. That is, according to this embodiment, the backup ring 60 expands in the radial direction in accordance with the spread of the gap between the body portion 14 and the base 22. Therefore, since the gap between the body portion 14 and the base 22 is closed, the seal member 50 and the O-ring 34 are prevented from passing through the gap between the body portion 14 and the base 22 and falling off from the packing housing portion 30.

  Further, the seal member 50 is in contact with the backup ring 60 regardless of the pressure fluctuation in the body portion 14. Therefore, the seal member 50 is maintained in a substantially C-shaped state. That is, the sealing performance is ensured by stabilizing the shape of the sealing member 50.

  Furthermore, in this embodiment, since it can accept | permit that the trunk | drum 14 expands, the reinforcement of the radial direction of the trunk | drum 14 can be decreased. That is, the amount of CFRP (carbon fiber reinforced resin) constituting the first fiber reinforced resin member 16 wound around the outer peripheral surface 20 of the trunk portion 14 can be reduced. Thereby, the man-hour required for the reinforcement of the trunk | drum 14 to the radial direction can be reduced, and the work man-hour at the time of manufacture of the high-pressure vessel 10 can be reduced.

  As described above, according to the present embodiment, the sealed state between the body portion 14 and the base 22 can be stably maintained regardless of the fluctuation of the pressure inside the body portion 14. Thereby, it can suppress that a fluid leaks from between the trunk | drum 14 and the nozzle | cap | die 22 irrespective of the fluctuation | variation of the pressure inside the high-pressure vessel 10.

  The base 22 of the present embodiment is formed so as to be relatively displaceable along the axial direction with respect to the body portion 14. Therefore, the fluid leaks from the gap between the body portion 14 and the base 22 even when the body portion 14 does not expand in diameter as the pressure of the fluid increases, or when the base 22 is displaced outward in the axial direction along with the diameter expansion. Is suppressed. Thereby, in the high pressure vessel 10 of this embodiment, a higher pressure fluid can be accommodated.

  Further, a plurality of body parts 14 are arranged adjacent to each other. In addition, the base 22 integrally closes the openings of the plurality of body parts 14, and communication channels 26 that respectively communicate the insides of the plurality of body parts 14 are formed inside the base 22. That is, according to the present embodiment, the fluid inside the body portion 14 can move to the inside of the plurality of body portions 14, whereby the pressure of the fluid inside the body portion 14 is made uniform. Thereby, the bias of the pressure of the fluid which acts on the some nozzle | cap | die 22 can be suppressed.

(Other configurations and functions / effects)
In the backup ring 60 of the present embodiment, a first protrusion 64 as a protrusion is provided on the radially outer side (the body part 14 side) of the ring main body 62, and the other inner side in the radial direction of the ring main body 62. Although the 2nd protrusion part 66 as a protrusion part is provided, it is not this limitation. That is, if the gap between the body portion 14 and the base 22 can be closed by the first projecting portion 64, the second projecting portion 66 is not necessarily provided. That is, the same effect as that of the present embodiment can be obtained even with a backup ring in which only the first protrusion 64 is provided without providing the second protrusion 66.

  Moreover, in this embodiment, the both ends of the axial direction of the trunk | drum 14 are opened, The edge part of the axial direction in this trunk | drum 14 (vehicle rear side) end and the other side (vehicle front side) end Although the base 22 is inserted into each part, the present invention is not limited to this. For example, only one of the end portions in the axial direction of the body portion 14 may be opened, and the base 22 may be inserted into the end portion having the opening.

  In addition, the high-pressure vessel 10 of the present embodiment has a substantially cylindrical shape due to the cylindrical body portion 14, but is not limited thereto, and the high-pressure vessel 10 is not limited to an oval cylindrical shape or a polygonal cylindrical shape. May be formed.

  Further, the packing 32 may be constituted by only the seal member 50 and the backup ring 60 without accommodating the O-ring 34 in the accommodating portion 58 of the seal member 50. Furthermore, it is good also as a structure which provided the plate-shaped spring in the inside of the sealing member 50 instead of providing the O-ring 34. FIG.

  Further, the second fiber reinforced resin member 18 is made of CFRP, but is not limited thereto, and may be made of a resin member reinforced with fibers other than carbon fiber, or made of a material other than resin. May be.

  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.

DESCRIPTION OF SYMBOLS 10 High pressure vessel 14 Body part 22 Base 50 Seal member 60 Backup ring 64 1st protrusion part (protrusion part)

Claims (1)

A body part that is formed in a cylindrical shape and that is open at least on one end in the axial direction;
A base that closes the opening by being inserted into the body part;
In the radial direction of the body portion, a seal member that closes between the body portion and the base;
A backup ring provided adjacent to the seal member on the outer side in the axial direction of the body portion;
In the backup ring, provided in the axially inner side and the radially outer side of the body part, and a projecting part that is displaced toward the body part side when the seal member abuts,
A high pressure vessel.