High-pressure tank and manufacturing method of high-pressure tank

Patent metadata

Field	Value
Publication number	US-9879825-B2
Application number	US-201013701856-A
Country	US
Kind code	B2
Filing date	Jun 8, 2010
Priority date	Jun 8, 2010
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A high-pressure tank configured to store a fluid includes: a liner; and a fiber-reinforced resin layer configured to cover surface of the liner. The liner includes: a cylindrical liner portion in a cylindrical shape; and dome liner portions in a dome shape, each dome liner portion being connected with the cylindrical liner portion, such that an outer surface of the dome liner portion is inclined at a predetermined angle to an outer surface of the cylindrical liner portion. The fiber-reinforced resin layer includes a hoop layer provided by hoop winding that winds the fiber substantially perpendicularly to a central axis of the cylindrical liner portion. The hoop layer is formed, such that an outer surface of the hoop layer has a smaller angle than the predetermined angle to the outer surface of the dome liner portion at a boundary between the hoop layer and the dome liner portion.

First claim

The invention claimed is:

1. A high-pressure tank configured to store a fluid, comprising:
a liner; and
a fiber-reinforced resin layer configured to include a fiber and to cover surface of the liner,
wherein the liner includes:
a cylindrical liner portion in a cylindrical shape; and
dome liner portions in a dome shape connected with respective sides of the cylindrical liner portion, each of the dome liner portions being connected with the cylindrical liner portion at a boundary point,
wherein the liner is formed such that, for each dome liner portion, a first tangent line at an outer surface of the cylindrical liner portion at the boundary point is not equal to a second tangent line at an outer surface of the dome liner portion at the boundary point, such that the outer surface of the dome liner portion is inclined at a predetermined angle to the outer surface of the cylindrical liner portion at the boundary point, wherein the predetermined angle is 20 degrees or more,

wherein the fiber-reinforced resin layer includes:
a hoop layer formed directly on the outer surface of the cylindrical liner portion to cover the outer surface of the cylindrical liner portion, the hoop layer being provided by hoop winding that winds the fiber substantially perpendicularly to a central axis of the cylindrical liner portion,

wherein the hoop layer is formed, such that an outer surface of the hoop layer has a smaller angle than the predetermined angle to the outer surface of the dome liner portion at a boundary between the hoop layer and the dome liner portion, and
wherein the hoop layer includes:
a cylindrical hoop portion configured to have a fixed thickness; and
a dome hoop portion located between the cylindrical hoop portion and the dome liner portion, the dome hoop portion being configured to have thickness gradually decreasing from the fixed thickness, from the cylindrical hoop portion toward the dome liner portion,

wherein the fiber-reinforced resin layer further includes:
a helical layer formed on the outer surface of the hoop layer and the outer surface of the dome liner portion, the helical layer being provided by helical winding,

wherein the helical winding turns back a winding direction of the fiber at the dome liner portion before the fiber in the helical layer goes round the central axis on the hoop layer,
a first layer is formed by hoop winding, the first layer being formed outside the helical layer, and
a second layer is formed by helical winding, the second layer being formed outside the helical layer.

2. The high-pressure tank according to claim 1 ,
wherein the cylindrical hoop portion is formed by stacking a predetermined number of layers of the fiber, and
the dome hoop portion is formed by gradually decreasing the number of layers of the fiber from the predetermined number, from the cylindrical hoop portion toward the dome liner portion.

3. The high-pressure tank according to claim 1 , wherein
an outer surface of the dome hoop portion and an outer surface of the dome liner portion form the same equally stressed surface.

4. The high-pressure tank according to claim 1 , wherein
the cylindrical liner portion has a constant outer diameter.

5. The high-pressure tank according to claim 1 ,
wherein the hoop layer is formed, such that a slope of a tangent line on the outer surface of the hoop layer is equal to a slope of a tangent line on the outer surface of the dome liner portion at the boundary.

6. The high-pressure tank according to claim 5 ,
wherein the fiber-reinforced resin layer has a first type of layer formed by the hoop winding and a second type of layer formed by the helical winding.

7. A manufacturing method of a high-pressure tank used to store a fluid, comprising the steps of:
(a) providing a liner that includes: a cylindrical liner portion in a cylindrical shape; and dome liner portions in a dome shape connected with respective sides of the cylindrical liner portion, each of the dome liner portions being connected with the cylindrical liner portion at a boundary point,
wherein the liner is formed such that, for each dome liner portion, a first tangent line at an outer surface of the cylindrical liner portion at the boundary point is not equal to a second tangent line at an outer surface of the dome liner portion at the boundary point, such that the outer surface of the dome liner portion is inclined at a predetermined angle to the outer surface of the cylindrical liner portion, wherein the predetermined angle is 20 degrees or more; and
(b) forming a fiber-reinforced resin layer including a fiber to cover surface of the liner,
wherein the step (b) includes the step of forming a hoop layer directly on the outer surface of the cylindrical liner portion by hoop winding that winds the fiber substantially perpendicularly to a central axis of the cylindrical liner portion to cover the outer surface of the cylindrical liner portion,
wherein the hoop layer is formed, such that an outer surface of the hoop layer has a smaller angle than the predetermined angle to the outer surface of the dome liner portion at a boundary between the hoop layer and the dome liner portion, and
wherein the hoop layer includes:
a cylindrical hoop portion configured to have a fixed thickness; and
a dome hoop portion located between the cylindrical hoop portion and the dome liner portion, the dome hoop portion being configured to have thickness gradually decreasing from the fixed thickness, from the cylindrical hoop portion toward the dome liner portion,

wherein the fiber-reinforced resin layer further includes:
a helical layer formed on the outer surface of the hoop layer and the outer surface of the dome liner portion, the helical layer being provided by helical winding,

wherein the helical winding turns back a winding direction of the fiber at the dome liner portion before the fiber in the helical layer goes round the central axis on the hoop layer,
a first layer is formed by hoop winding, the first layer being formed outside the helical layer, and
a second layer is formed by helical winding, the second layer being formed outside the helical layer.

8. The manufacturing method of claim 7 , wherein
an outer surface of the dome hoop portion and an outer surface of the dome liner portion form the same equally stressed surface.

9. The manufacturing method of claim 7 , wherein
the cylindrical liner portion has a constant outer diameter.

Assignees

• Kaneko Tomonori
• Otsubo Hirokazu
• Toyota Motor Co Ltd

Inventors

• Kaneko Tomonori
• Otsubo Hirokazu

Classifications

• F17C1/00

  Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge (pressurised apparatus for purposes other than storage, see the relevant subclasses such as A62C, B05B; associated with vehicles, see the appropriate subclass of classes B60 - B64; pressure vessels in general F16J12/00 {; autoclaves B01J3/04; tank vehicles B60P3/22; railway tank wagons for carrying fluent materials B61D5/00; accumulators for supplying fluid under pressure F15B1/04; liquefied gas stoves F24C3/00}) · CPC title

• B29C53/58

  helically · CPC title

• F17C2205/0397

  on both sides of the pressure vessel · CPC title

• B32B1/02

  Operations & Transport · mapped topic

• F17C1/06 Primary

  built-up from wound-on bands or filamentary material, e.g. wires · CPC title