JP2009029006A - Method for winding fiber around tank, and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the sliding and sagging of a fiber when the fiber is wound around a tank. <P>SOLUTION: The fiber winding device comprises: a magnetic field generator 4 where a magnetic field is formed at a region in which at least a fiber 3 is wound in a tank 2 as an object for the winding of the fiber 3; a magnetic field direction regulator 5 where the direction of a magnetic field B formed by the magnetic field generator 4 i changed; and a voltage applicator where electric current is made to flow to the fiber 3 in a direction at which the fiber 3 is pressed to the tank 2. The tank 2 is arranged in the magnetic field B, and, while flowing electric current to the fiber 3 in a direction at which the fiber 3 is pressed against the tank 2, the fiber 3 is wound around the outer circumference of the tank 2. It is preferable that the force of pressing the fiber 3 to the tank 2 is regulated by controlling the amount of the electric current to be made to flow. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for winding a fiber around a tank and an apparatus therefor. More specifically, the present invention relates to a method and an apparatus for winding a fiber used for improving the strength of a tank around the tank.

  In order to improve the strength of a cylindrical pressure vessel (in the present specification, these pressure vessels are called tanks), carbon fibers are wound around the outer periphery of the tank by the FW method (filament winding method). In addition, when the tank has a straight part (for example, a cylindrical part) and a dome part (for example, a hemispherical part near the base part), the fibers are repeatedly formed by repeating the hoop winding, the helical winding, or the combination connecting the hoop winding to the helical winding. Wrapped.

Conventionally, as a technique (FW method) used in such a fiber winding, a method of maintaining the position of the mandrel (core type) with a magnetic force, a method of variably controlling the position of the mandrel, etc. have been disclosed (for example, Patent Documents 1 to 3).
JP-A-3-169619 JP-A-6-339993 JP-A-6-143439

  However, in the current FW method, slipping of fibers may occur when performing the above combination or helical winding. Further, when the rotational speed of the tank is increased using a high-speed FW machine or the like, the centrifugal force increases and the fibers are loosened, or the catching force at the dome portion is lowered and the slipping becomes easier.

  Then, an object of this invention is to provide the fiber winding method around the tank which enabled it to suppress the slip and slack of a fiber, and its apparatus.

  In order to solve such a problem, the present inventor has made various studies and has come to know a technology that leads to the solution of the problem. The present invention is based on such knowledge, and a tank in which a fiber is wound is disposed in a magnetic field, and the fiber is wound around the outer periphery of the tank while energizing the fiber in a direction in which the fiber is pressed against the tank. This is a fiber winding method.

  Thus, when a fiber is energized in a magnetic field, a force in a certain direction acts on the fiber (Fleming's left-hand rule). In this invention, the state which pressed the fiber against the tank using this force is formed, and the slip and slack of the fiber at the time of winding are suppressed.

  In this case, it is preferable to control the energization amount to adjust the force with which the fibers are pressed against the tank. It is possible to adjust the force with which the fibers are pressed against the tank according to the amount of energization.

  Moreover, it is preferable that the device for generating the magnetic field is rotatable and is adjusted so that the force received by the fibers faces the central axis of the tank. In this case, it is more preferable to rotate the device that generates a magnetic field in accordance with the relative winding direction of the fiber with respect to the tank. For example, the relative position of the tank shape and the fiber feeding position may change as the location where the fiber is wound changes, and the angle of the fiber fed into the magnetic field may change. According to the present invention, in such a case, a device for generating a magnetic field can be appropriately rotated, and the direction of the magnetic field can be adjusted according to the winding direction of the fiber.

  In the present invention, the winding of the fiber is started from the vicinity of the base of the tank.

  Further, the fiber winding device around the tank according to the present invention includes a magnetic field generating device that forms a magnetic field in at least a region where the fiber is wound in a tank that is a fiber winding target, and a magnetic field generated by the magnetic field generating device. A magnetic field direction adjusting device that changes the direction, and a voltage applying device that energizes the fibers in a direction in which the fibers are pressed against the tank.

  ADVANTAGE OF THE INVENTION According to this invention, when winding a fiber around a tank, it becomes possible to suppress the slip and slack of the said fiber.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 and 2 show an embodiment of a fiber winding method and apparatus for a tank according to the present invention. The fiber winding device 1 to the tank 2 according to the present invention includes a magnetic field generating device 4 that forms a magnetic field, a magnetic field direction adjusting device 5 that changes the direction of the magnetic field, and a voltage applying device 6 that energizes the fibers 3. It is an apparatus provided with.

  The tank 2 is, for example, a cylindrical pressure vessel capable of storing various gases and liquids (see FIG. 1 and the like). Although there are various external shapes and structures of the tank 2, the tank 2 of the present embodiment has a structure in which a cap portion is provided at one end of a sealed cylindrical main body constituting the body of the tank 2 (see FIG. 1). . Such a tank 2 includes, for example, a pressure vessel for a fuel gas (hydrogen gas) capable of storing a gas of about 35 MPa to 70 MPa used in a fuel cell system. Moreover, in order to improve tank strength, the fiber 3 is wound around the outer periphery of the tank 2 by, for example, the FW method.

  The base portion is formed of, for example, a metal containing aluminum, and is provided at the center of the hemispherical end wall portion of the tank body. The valve assembly 2a is formed on the inner peripheral surface of the base part and is screwed into the base part via a screw so that the valve assembly 2a is detachably fastened.

  The fiber 3 is wound around the outer periphery of the tank 2 and functions to improve the strength of the tank 2. In this embodiment, conductive resin-impregnated fibers such as carbon fibers are used as the fibers 3. The fiber 3 is wound around the bobbin 7 (see FIG. 2).

  The magnetic field generation device 4 is a device for forming a magnetic field B around the tank 2 to which the fibers 3 are wound and around the tank 2. For example, in this embodiment, a pair of magnets composed of an N pole and an S pole arranged so as to sandwich the tank 2 are used as the magnetic field generator 4. More specifically, an S pole 42 is disposed on the central axis on the base side of the tank 2 and an N pole 41 is disposed on the central axis on the opposite side (bottom side) (see FIG. 1). Thereby, the magnetic field B which goes to the nozzle | cap | die part side from the bottom side is formed in the tank 2 and its circumference | surroundings. Further, in the present embodiment, plate-like N pole 41 and S pole 42 having a larger area than the cross section of the tank 2 are used, and a magnetic field B is formed in at least a region of the tank 2 where the fibers 3 are wound. (See FIG. 1).

  The magnetic field direction adjusting device 5 is a device for changing the direction of the magnetic field B formed by the magnetic field generating device 4 described above. Such a magnetic field direction adjusting device 5 is only required to change the relative direction of the magnetic field B with respect to the tank 2. Can be configured. For example, in the present embodiment, the N pole 41 and the S pole 42 are fixed to both ends of the support member 51 disposed above the tank 2, and the vertical rotation shaft 52 provided at the approximate center of the support member 51 is the center. The support member 51 is rotatable (see FIG. 1). When the support member 51 is rotated about the vertical rotation shaft 52, the positions of the N pole 41 and the S pole 42 fixed to both ends of the support member 51 change, and the direction of the magnetic flux B changes. Although not specifically described in detail, reference numeral 53 denotes an actuator for rotating the vertical rotation shaft 52 and the support member 51 (see FIG. 1). Further, the magnetic field direction adjusting device 5 is configured so as not to hinder the work of winding the fiber 3 around the tank 2.

  The voltage application device 6 is a device for energizing the fibers 3. For example, in this embodiment, a conductor 62 is connected to the tip of the fiber 3 and the end of the fiber 3 wound around the bobbin 7 to form a circuit, and a voltage is applied by a power supply 61 provided in the middle of the conductor 62. (See FIG. 2). When the fiber 3 is wound around the tank 2, it is not necessary to wind the conductive wire 62 if the winding is started after the tip of the fiber 3 is left slightly.

  Further, the voltage application device 6 energizes the fibers 3 in the direction in which the fibers 3 are pressed against the tank 2. When the fiber 3 located in the magnetic field B is energized, a force acts on the fiber 3 in accordance with Fleming's left-hand rule, so that the fiber 3 is energized so as to be pressed against the tank 2. For example, in the case of the present embodiment, in the magnetic field B from the bottom side of the tank 2 toward the base part side, a current F in the direction from the end to the tip is passed through the fiber 3, thereby causing an approximately vertical downward force F. Is acting on the fiber 3 (see FIG. 1).

Here, when the length of the fiber 3 in the magnetic field B is L, and the angle between the direction of the current flowing through the fiber 3 and the direction of the magnetic field B is θ, the force acting on the fiber 3 according to Fleming's left-hand rule F is F = IBLsinθ
It becomes. Here, I and B represent the magnitudes of current and magnetic field, respectively.

  Although not shown in detail in detail, a device for winding the fiber 3 around the tank 2, for example, a device for rotating the tank 2 or a device for applying tension to the fiber 3 is sufficient. In FIG. 1, only the center axis | shaft at the time of rotating the tank 2 and the guide provided in the middle of the feed path | route of the fiber 3 are each shown with the codes | symbols 8 and 9 (refer FIG. 1).

  According to the fiber winding device 1 of the present embodiment as described above, by energizing the fiber 3 in the magnetic field B, it is possible to wind the fiber 3 while applying the force F to the tank 2 side. . In such a case, the force F can be used to press the fibers 3 against the tank 2 to increase the adhesion, thereby suppressing slipping or loosening of the fibers 3 during winding, and thus controlling the position of the resin liner. it can.

  Further, when the fiber 3 is wound around the outer periphery of the tank 2, for example, the relative position of the tank shape and the fiber feed position (for example, the position of the guide 9) changes as the position where the fiber 3 is wound changes, and the fiber 3 fed into the magnetic field B. In such a case, in the fiber winding device 1 of this embodiment, the direction of the magnetic field B is appropriately changed using the magnetic field direction adjusting device 5 in such a case, and the winding direction of the fiber 3 is changed. The direction of the magnetic field B can be adjusted according to. According to this, it is possible to keep the fiber 3 pressed against the tank 2 by adjusting the force F received by the fiber 3 so as to always face the central axis of the tank 2.

  Furthermore, in the fiber winding device 1, the magnitude of the force F with which the fiber 3 is pressed against the tank 2 can be adjusted by controlling the amount of current applied to the fiber 3 by the voltage application device 6. Furthermore, the magnitude of the force F may be appropriately adjusted by appropriately changing the magnitude of the magnetic force of the magnets (N pole 41 and S pole 42). Thus, by appropriately adjusting the force (adhesion force) F that presses the fiber 3 against the tank 2, even when the fiber 3 is wound at a high speed using, for example, a high-speed FW machine, the slip F is applied to overcome the centrifugal force. Can be suppressed as much as possible.

  Incidentally, in this embodiment, the winding of the fiber is started from the vicinity of the cap portion of the tank 2. In this case, the tip of the fiber 3 is left a little as described above from the part where the winding is started, and a circuit including the conductor 62 and the power supply 61 is formed.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, the magnetic field direction adjusting device 5 in the above-described embodiment is a device that changes the direction of the magnetic field formed by the magnetic field generator 4 described above, but in addition, the direction of the tank 2 is changed to change the direction of the magnetic field B. It is also possible to change the direction relatively.

It is a perspective view of the fiber winding apparatus which shows one Embodiment of this invention. It is a figure which shows the structural example of a voltage application apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fiber winding apparatus, 2 ... Tank, 3 ... Carbon fiber (fiber), 4 ... Magnetic field generator, 5 ... Magnetic field direction adjustment apparatus, 6 ... Voltage application apparatus, B ... Magnetic field

Claims (6)

  A fiber winding around a tank, characterized in that a tank as a fiber winding target is placed in a magnetic field, and the fiber is wound around an outer periphery of the tank while energizing the fiber in a direction in which the fiber is pressed against the tank. Method.   The method for winding a fiber around a tank according to claim 1, wherein the energizing amount is controlled to adjust a force with which the fiber is pressed against the tank.   The method for winding a fiber around a tank according to claim 1 or 2, wherein a device for generating the magnetic field is rotatable, and the force received by the fiber is adjusted so as to face a central axis of the tank.   The method of winding a fiber around a tank according to claim 3, wherein the device that generates the magnetic field is rotated according to a relative winding direction of the fiber with respect to the tank.   The method of winding a fiber around a tank according to any one of claims 1 to 4, wherein winding of the fiber is started from the vicinity of a base portion of the tank. A magnetic field generator that forms a magnetic field in at least an area in which the fiber is wound in a tank to which the fiber is wound;
A magnetic field direction adjusting device for changing the direction of the magnetic field formed by the magnetic field generator;
A voltage application device for energizing the fibers in a direction in which the fibers are pressed against the tank;
A device for winding a fiber around a tank, comprising:

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