SEAL STRUCTURE OF HIGH-PRESSURE TANK

• US 20190316681A1
• Filed: 04/15/2019
• Published: 10/17/2019
• Est. Priority Date: 04/16/2018
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: SAWAI, Osamu, KUSABA, Kosuke
• Granted Patent: US 10,890,256 B2
• Time in Patent Office: Days
• CPC Class Codes: F16J 15/164 the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
• CPC Class Codes: F16J 15/166 with means to prevent the extrusion of the packing
• CPC Class Codes: F17C 1/00 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 Class Codes: F17C 13/06 Closures, e.g. cap, breakable member for autoclaves B01J3/03; closures for large containers in general B65D B65D90/54; for pressure vessels in general F16J13/00
• CPC Class Codes: F17C 2201/0109 with exteriorly curved end-piece
• CPC Class Codes: F17C 2201/056 Small (<1 m3)
• CPC Class Codes: F17C 2203/0604 Liners
• CPC Class Codes: F17C 2203/0619 with two layers
• CPC Class Codes: F17C 2203/0646 Aluminium
• CPC Class Codes: F17C 2203/0658 Synthetics
• CPC Class Codes: F17C 2203/0663 in form of fibers or filaments
• CPC Class Codes: F17C 2205/0305 Bosses, e.g. boss collars
• CPC Class Codes: F17C 2205/0323 Valves
• CPC Class Codes: F17C 2209/2154 Winding
• CPC Class Codes: F17C 2209/234 of closing end pieces, e.g. caps
• CPC Class Codes: F17C 2221/012 Hydrogen
• CPC Class Codes: F17C 2221/033 Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
• CPC Class Codes: F17C 2223/0123 gaseous, e.g. CNG, GNC
• CPC Class Codes: F17C 2223/036 Very high pressure (>80 bar)
• CPC Class Codes: F17C 2270/0178 Cars
• CPC Class Codes: Y02E 60/32 : Hydrogen storage

Abstract

A seal structure of a high-pressure tank including: the first member in which a tank chamber is formed inside; and the second member which is fitted into the opening hole of the first member and provided with an annular groove formed on an outer peripheral surface, the seal structure includes: a seal member, having an annular shape, configured to be disposed on the tank chamber side in the groove; and a first back-up member and a second back-up member configured to be disposed further to the side opposite to the tank chamber side than the seal member in the groove, to include inclined surface parts respectively opposite to each other. The inclined surface part of the first back-up member includes a crest folding corner part in which a first low angle inclined part and a first high angle inclined part are connected to each other.

Claims

1. A seal structure of a high-pressure tank that seals a space between a first member having a cylindrical shape and a second member, the high-pressure tank including:

the first member in which an opening hole is provided at an end part in the axial direction and a tank chamber is formed inside; and

the second member which is fitted into the opening hole of the first member and provided with an annular groove formed on an outer peripheral surface, the seal structure comprising;

a seal member, having an annular shape, configured to be disposed on the tank chamber side in the groove and to be moved by being pressed in the axial direction opposite to the tank chamber side by the pressure of the tank chamber; and

a first back-up member and a second back-up member configured to be disposed further to the side opposite to the tank chamber side than the seal member in the groove, to include inclined surface parts respectively opposite to each other, and to be deformed so that the whole width in the radial direction becomes large by sliding therebetween which is caused by being pressed from the seal member moved by the pressure of the tank chamber in a state where the inclined surface parts abut on each other, wherein

the inclined surface part of the first back-up member includes;

a first low angle inclined part configured to be inclined at a predetermined angle with respect to the axial direction of the first member;

a first high angle inclined part configured to be inclined at an angle larger than the predetermined angle with respect to the axial direction of the first member, and to generate abutting later than abutting timing at the first low angle inclined part at the time of the pressure from the seal member; and

a crest folding corner part in which the first low angle inclined part and the first high angle inclined part are connected to each other.

2. The seal structure of the high-pressure tank according to claim 1, wherein

the inclined surface part of the second back-up member includes:

a second low angle inclined part configured to be inclined to a corresponding angle corresponding to the predetermined angle of the first low angle inclined part with respect to the axial direction of the first member;

a second high angle inclined part configured to be inclined at an angle larger than the corresponding angle with respect to the axial direction of the first member, and to generate abutting later than abutting timing at the second low angle inclined part at the time of the pressure from the seal member; and

a root folding corner part via which the second low angle inclined part and the second high angle inclined part are connected to each other.

3. The seal structure of the high-pressure tank according to claim 1, wherein:

the second back-up member is disposed closer to the tank chamber side than the first back-up member in the groove; and

the first back-up member is disposed so that the first low angle inclined part is positioned closer to the tank chamber side than the first high angle inclined part.

4. The seal structure of the high-pressure tank according to claim 3, wherein

the first back-up member is disposed so that the first low angle inclined part is positioned closer to the outer side in the radial direction than the first high angle inclined part.

5. The seal structure of the high-pressure tank according to claim 1, wherein

the first member is a liner made of a resin.

6. The seal structure of the high-pressure tank according to claim 5, wherein

the second member is a mouthpiece mounted on the end part in the axial direction of the first member.