Pressure vessel and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11524447-B2
Application number	US-202017083297-A
Country	US
Kind code	B2
Filing date	Oct 29, 2020
Priority date	Nov 11, 2019
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A pressure vessel includes a vessel body including a cylindrical-shaped straight body portion with a spiral-shaped projection portion formed at an outer peripheral surface of the straight body portion, and a covering portion that comprises a fiber bundle wrapped onto the outer peripheral surface of the straight body portion in a spiral pattern running parallel to the projection portion so as to cover the outer peripheral surface of the straight body portion.

First claim

What is claimed is:

1. A pressure vessel, comprising:
a vessel body that comprises a cylindrical-shaped straight body portion with a spiral-shaped projection portion at an outer peripheral surface of the straight body portion; and
a covering portion that comprises a fiber bundle wrapped onto the outer peripheral surface of the straight body portion, wherein
the fiber bundle comprises:
a first layer wrapped onto the outer peripheral surface of the straight body portion in a first spiral pattern running parallel to the projection portion so as to cover the outer peripheral surface of the straight body portion, and
a second layer above the first layer, the second layer wrapped in a second spiral pattern along a direction that intersects with the projection portion, and

a height of the projection portion is less than a thickness of the first layer of the fiber bundle.

2. The pressure vessel according to claim 1 , wherein a wrapping angle θ of the first layer of the fiber bundle with respect to an axial direction of the vessel body is within a range of 54.7°±10°.

3. The pressure vessel according to claim 2 , wherein an inclination angle of the projection portion with respect to the axial direction of the vessel body is within a range of 54.7°±10°.

4. The pressure vessel according to claim 1 , further comprising:
a thermosetting resin impregnated into the fiber bundle and cured to harden the fiber bundle.

5. A pressure vessel manufacturing method of manufacturing the pressure vessel according to claim 1 , the method comprising:
a molding process of molding the vessel body that comprises the cylindrical-shaped straight body portion such that the spiral-shaped projection portion, which is a protrusion formed by a parting line or by creating a vacuum when the vessel body is extrusion-molded, is formed at the outer peripheral surface of the cylindrical-shaped straight body portion; and
a wrapping process of wrapping the first layer and then the second layer of the fiber bundle onto the outer peripheral surface of the straight body portion so as to cover the outer peripheral surface of the straight body portion.

6. The pressure vessel manufacturing method according to claim 5 , wherein a wrapping angle θ of the first layer of the fiber bundle with respect to an axial direction of the vessel body is within a range of 54.7°±10°.

7. The pressure vessel manufacturing method according to claim 6 , wherein an inclination angle of the projection portion with respect to the axial direction of the vessel body is within a range of 54.7°±10°.

8. The pressure vessel manufacturing method according to claim 5 , further comprising:
after the wrapping process, a hardening process of impregnating a thermosetting resin into the fiber bundle that is wrapped onto the outer peripheral surface of the straight body portion and heating the fiber bundle.

9. The pressure vessel according to claim 1 , wherein
the first layer of the fiber bundle is arranged on opposite sides of the projection portion without getting over the projection portion, and
the second layer of the fiber bundle extends over the projection portion.

10. The pressure vessel according to claim 9 , wherein
the second layer of the fiber bundle extends over the projection portion without contacting the projection portion.

11. The pressure vessel manufacturing method according to claim 5 , wherein, in the wrapping process,
the first layer of the fiber bundle is wrapped to be on opposite sides of the projection portion without getting over the projection portion, and
the second layer of the fiber bundle is wrapped over the projection portion.

12. The pressure vessel manufacturing method according to claim 11 , wherein, in the wrapping process,
the second layer of the fiber bundle is wrapped over the projection portion without contacting the projection portion.

13. The pressure vessel according to claim 1 , wherein
the second layer of the fiber bundle is directly wound onto the first layer of the fiber bundle, and a gap is between the projection portion and the second layer of the fiber bundle.

Assignees

• Toyota Motor Co Ltd

Inventors

• Iriyama Yojiro

Classifications

• F17C2203/0609

  Straps, bands or ribbons · CPC title

• F17C2260/012

  Reducing weight · CPC title

• F17C2203/012

  on or in the wall, e.g. ribs · CPC title

• Y02E60/32

  Hydrogen storage · CPC title

• F17C2223/036

  Very high pressure (>80 bar) · CPC title