WO2006082765A1 - 高圧タンクのシール構造 - Google Patents
高圧タンクのシール構造 Download PDFInfo
- Publication number
- WO2006082765A1 WO2006082765A1 PCT/JP2006/301389 JP2006301389W WO2006082765A1 WO 2006082765 A1 WO2006082765 A1 WO 2006082765A1 JP 2006301389 W JP2006301389 W JP 2006301389W WO 2006082765 A1 WO2006082765 A1 WO 2006082765A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure tank
- sealing material
- sealing
- seal
- seal structure
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 42
- 230000035699 permeability Effects 0.000 claims abstract description 23
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 12
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 9
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 6
- 239000003566 sealing material Substances 0.000 claims description 93
- 238000007789 sealing Methods 0.000 claims description 49
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 239000007789 gas Substances 0.000 description 54
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 18
- 230000007423 decrease Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
- F16L55/1108—Plugs fixed by screwing or by means of a screw-threaded ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0305—Bosses, e.g. boss collars
Definitions
- the present invention relates to a structure in which an attachment member is attached to an opening of a high-pressure tank, for example, a seal structure of a high-pressure tank between a base constituting the opening and a valve body constituting an attachment member.
- a high-pressure tank that stores a gas such as hydrogen gas at a high pressure is mounted, for example, on a fuel cell vehicle.
- the base of the high-pressure tank is disposed in the opening of the tank body provided at the end of the high-pressure tank (see, for example, Patent Document 1).
- a valve body in which a piping element such as pulp is integrated is screwed into the opening of this type of base.
- a sealing material is provided between the base and the tank body or between the base and the pulp body (see, for example, Patent Documents 1 to 3).
- Patent Document 1 employs a double seal structure in which a shaft seal is provided by two O-rings as a seal method for enhancing this type of sealability.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2000-16 1590 (Fig. 3)
- Patent Document 2 Japanese Patent Application Laid-Open No. 2003-279000 (FIGS. 2 to 4)
- Patent Document 3 Japanese Patent Application Laid-Open No. 2002-349796 (FIG. 2) Disclosure of the Invention
- a high pressure tank seal structure of the present invention is a high pressure tank seal structure between an opening of a high pressure tank and a mounting member attached thereto, and an opening constituting the opening.
- a plurality of sealing materials having different sealing characteristics are provided between the edge portion and the mounting member. According to this configuration, for example, even in a certain temperature environment, even if the elasticity of one sealing material is lowered, the sealing performance can be exhibited without lowering the elasticity of the other sealing material.
- the plurality of sealing members with different sealing characteristics it is possible to appropriately ensure the sealing performance between the opening of the high-pressure tank and the mounting member.
- the opening and the opening edge can be formed of a base, and the attachment member can be formed of a functional component attached to the opening of the base.
- a functional component is a component that includes a piping element such as a pipe constituting a fluid passage in addition to a valve or a joint, or a detecting element such as a pressure sensor or a temperature sensor.
- the functional component is a valve body that is integrated with a piping element such as pulp, the sealing performance between the base and the pulp body is adequate. Can be secured.
- the opening and the opening edge are composed of the inner or outer shell of the high-pressure tank, and the mounting member is composed of a functional part such as a base attached to the opening of the inner or outer shell or a valve body. can do. Therefore, the seal structure of the present invention is provided between the inner shell of the high pressure tank and the base, between the inner shell of the high pressure tank and the valve body, between the outer shell of the high pressure tank and the base, and between the high pressure tank and the base. It can also be applied between the outer shell and the valve body.
- the plurality of sealing materials have different temperature characteristics.
- a high-pressure tank that changes in temperature with filling and discharging can be reliably sealed in a wide temperature range.
- the plurality of sealing materials include a first sealing material having low temperature resistance and a second sealing material having high temperature resistance.
- the plurality of sealing materials include a first sealing material and a second sealing material, and the first sealing material has a first temperature.
- the second sheath material is less likely to leak, and the second seal material is less likely to cause the first seal material to leak at a second temperature higher than the first temperature.
- the seal 1 "between the opening of the high-pressure tank and the mounting member is secured by the first sheath material when the temperature in the high-pressure tank drops,
- the second seal material is secured by the second seal material, so that even if the temperature environment of one seal material decreases, the elasticity of the other seal material functions effectively. Therefore, the sealing property between the opening and the mounting member can be appropriately secured in a wide temperature range.
- leaks are unlikely to occur at a certain temperature as explained below using the first temperature as an example.
- the fact that leaks are less likely to occur at the first temperature is that the first sealing material is more elastic than the second sealing material when the first temperature is reached. It is easy to deform. However, this condition is not always sufficient, and the permeability of the material itself may be considered.
- the first sealing material can effectively utilize existing gaskets and O-rings.
- butyl rubber is preferably made of silicone.
- the second sealing material is made of EPDM, since existing gaskets and O-rings can be used effectively.
- the first sealing material is located on the inner side of the second sealing material as viewed from inside the high-pressure tank.
- the first sealing material with low temperature resistance is positioned on the inner side (upstream side) when viewed from the inside of the high-pressure tank, so that the sealing performance corresponding to the frequently used one can be appropriately secured. it can.
- the first sealing material may be located on the outside of the second sealing material as seen from inside the high-pressure tank.
- the first sealing material can ensure sealing performance.
- the first sealing material and the second sealing material have different gas permeability, and the gas permeable property of the first sealing material and the second sealing material is different.
- the higher one is located on the outside of the high-pressure tank than the one with lower gas permeability.
- the plurality of sealing materials include The first sealing material and the second sealing material having different gas permeability are included, and the first sealing material is also highly gas permeable as the second sealing material, and the first sealing material is seen from the inside of the high-pressure tank.
- the second sealing material may also be located outside.
- the reliability of the seal can be improved by positioning the gas permeability higher on the outer side (downstream side) when viewed from inside the high-pressure tank.
- the second sealing material made of EP DM having relatively low gas permeability is replaced with the first sealing material made of silicone having relatively high gas permeability.
- the first seal material made of ptyl rubber with relatively low gas permeability is replaced with the second seal material made of EP DM with relatively high gas permeability. It is preferable to locate the inside of the high-pressure tank.
- the first sealing material and the second sealing material are displaced in the axial direction of the high-pressure tank, and between the inner peripheral surface of the opening edge and the outer peripheral surface of the mounting member. Is provided.
- both the first seal material and the second seal material function as shaft seals, the reliability 14 of the seal can be increased as compared with the case where they function as end face seals.
- the mounting groove for individually disposing the first sealing material and the second sealing material on at least one of the inner peripheral surface of the opening edge and the outer peripheral surface of the mounting member. Is formed.
- At least one of the inner peripheral surface of the opening edge and the outer peripheral surface of the mounting member is provided with the first sealing material and the second sealing material.
- a single mounting groove may be formed for arranging the sealing material together. According to this configuration, the two sealing materials can interfere with each other, but the space efficiency around these seals can be improved and the weight can be reduced.
- a pack up ring is further disposed in the mounting groove.
- the opening portion and the opening edge portion are configured by a base and the mounting member is formed of a valve body, it is preferable to employ the following configuration. .
- valve body has a threaded portion that is screwed into the opening edge, and the plurality of sealing materials are located on both sides in the axial direction of the threaded portion.
- the valve body may have a non-uniform temperature distribution in its axial direction.
- the influence of the temperature distribution of the valve body can be suitably avoided as compared with the case where the sealing material is centrally arranged on one end side of the threaded portion.
- the valve body has a plurality of portions having different diameters in the axial direction, and the plurality of sealing materials are formed corresponding to the diameter of the pulp body, and are larger than the threaded portion as viewed from inside the high pressure tank. It is preferable that the outer sealing material has a larger diameter than the inner sealing material than the screw portion.
- FIG. 1 is a cross-sectional view showing the configuration of the high-pressure tank according to the first embodiment.
- FIG. 2 is an enlarged view of a main part showing a seal structure around a base and a valve body according to the first embodiment.
- FIG. 3 is an enlarged view of a main part showing a seal structure around a base and a valve body according to the second embodiment.
- FIG. 4 is an enlarged view of the main part showing the seal structure around the base and the valve body according to the third embodiment.
- FIG. 5 is a cross-sectional view showing the configuration of the high-pressure tank according to the fourth embodiment.
- This seal structure is a double seal structure between the opening of the high-pressure tank and the mounting member attached to it. At that time, the two seal members are configured with different temperature characteristics. It is a thing.
- the opening of the base is taken as an example of the opening of the high-pressure tank
- the valve body is taken as an example of the mounting member.
- the high-pressure tank 1 includes a tank body 2 having a generally sealed cylindrical shape, a base 3 provided at one end of the tank body 2 in the longitudinal direction, and a pulp body 4 attached to the base 3. And. Inside the tank body 2 is a storage space 6 for storing various gases such as natural gas and hydrogen gas at high pressure.
- a storage space 6 for storing various gases such as natural gas and hydrogen gas at high pressure.
- the high-pressure tank 1 of the present invention can be applied not only to a gas tank but also to a liquid hydrogen tank or an MH (hydrogen storage alloy) tank.
- the tank body 2 has a two-layer structure of an inner liner 20 (inner shell) having gas parrial properties and a shell 22 (outer shell) made of FRP covering the outer side of the liner 20.
- the liner 20 is made of a resin such as high-density polyethylene.
- the tank body 2 can be made of resin.
- the tank body 2 can be made of metal such as aluminum alloy.
- the liner 20 may be made of metal such as aluminum, and the shell 22 may be made of resin.
- the base 3 is formed of a metal such as stainless steel, for example, and is provided at the center of the hemispherical end wall portion of the tank body 2.
- the valve body 4 (mounting member) is made of a metal such as stainless steel.
- the pulp body 4 is attached to the opening 30 by being screwed into the opening 30 of the base 3.
- the valve body 4 of this embodiment is configured as a valve assembly in which piping elements such as pulp and joints are integrated.
- the valve constituting the valve assembly includes, for example, a shut valve as a main valve and a regulator arranged in series with the shut valve.
- the valve body 4 may have a pressure sensor or a temperature sensor, a force of this type of valve or gas flow path.
- the functional parts that are screwed into the base 3 are not limited to the valve body 4, but include piping elements such as a single valve and fittings, piping that constitutes a gas flow path, and detection elements such as pressure sensors and temperature sensors. There may be.
- the valve body 4 is configured to extend inside and outside of the tank body 2 by a cylindrical part 40 (axial center part) located in the tank body 2 and an exposed part 4 2 located outside the tank body 2. .
- the cylindrical portion 40 and the exposed portion 42 are formed with gas passages (not shown) that connect the storage space 6 and an external gas line.
- the gas in the storage space 6 passes through the pulp body 4 gas flow path pulp and external gas.
- the gas is hydrogen gas
- the temperature in the tank body 2 decreases.
- hydrogen gas at 70 MPa is lowered to a lower temperature than 35 MPa.
- the gas is filled into the storage space 6 from an external gas filling line through the gas passages and valves of the valve body 4.
- the tank body 2 The temperature inside rises.
- the annular lower end surface 4 4 of the exposed portion 4 2 is seated on the upper end surface 3 4 of the flange portion 3 2 extending outside the tank body 2 of the base 3.
- screws 48 are formed on the outer peripheral surface 46 on the exposed portion 42 side, and corresponding to this, the base 3 is connected to the inner peripheral surface 36 of the opening 30. Screws 3 8 are formed.
- the cylindrical portion 40 is connected to the opening 30 of the base 3 through a slate screw through this screw portion.
- the cylindrical portion 40 is hermetically sealed between the male screw 48 and the base 3 at the back side of the male screw 48 (opposite to the exposed portion 42) by the sealing means 50.
- the sealing means 50 has two O-rings 5 1 and 5 2 for axially sealing between the base 3 and the valve body 4.
- the two O-rings 5 1 and 5 2 are provided between the outer peripheral surface 4 6 of the cylindrical portion 40 of the pulp body 4 and the inner peripheral surface 3 6 (opening edge) of the opening 3 0 of the base 3. .
- the two O-rings 5 1 and 5 2 are displaced in the center line direction of the valve body 4. Specifically, the first O-ring 5 1 is on the inside (upstream side, primary side) when viewed from inside the high-pressure tank 1, and the second O-ring 5 2 is on the outside (exposed portion 4) when viewed from inside the high-pressure tank 1. 2 side, downstream side, secondary side).
- the two O-rings 5 1 and 5 2 have a predetermined crushing allowance and are respectively attached to two annular mounting grooves 5 4 and 5 5 provided on the outer peripheral surface 46 of the cylindrical portion 40. Two mounting grooves 5 4 and 5 5 may be formed on the inner peripheral surface 36 of the opening 30 of the base 3.
- gas leakage from the high-pressure tank 1 includes the amount of gas permeated from the close contact portion between the sealing means 50 and the valve body 4 or the base 3 and the sealing means 50.
- the amount of gas that permeates through the sealing material in the thickness direction and two types of permeation amounts are considered. Therefore, when selecting the materials for the two O-rings 51 and 52, it is desirable to consider the total amount of gas permeation of the two types. As described above, since the temperature in the high-pressure tank 1 fluctuates, it is desirable to select materials that have different temperature characteristics of the two O-rings 5 1 and 5 2.
- the two O-rings 5 1 and 5 2 have different sealing characteristics (properties) such as temperature characteristics and gas permeability.
- the first O-ring 5 1 is made of a material with superior low-temperature characteristics (cold resistance) and a material with low gas permeability compared to the second O-ring 5 2.
- the first O-ring 51 is made of I IR (butyl rubber) and has low temperature resistance (good low temperature characteristics) and gas permeation resistance (gas impermeability).
- the second O-ring 52 is formed of EPDM (ethylene propylene rubber) and has high temperature resistance (good high temperature characteristics) and weather resistance.
- the “low temperature resistance” of the first O-ring 5 1 is, for example, the first O-ring 5 against the temperature in the tank body 2 that has decreased due to gas release (hydrogen gas release). It means that the elasticity of 1 does not decrease or is suppressed.
- the “high temperature resistance” of the second O-ring 5 2 means that the temperature of the second O-ring 5 2 increases with respect to the temperature in the tank body 2 that has risen due to gas filling (hydrogen gas filling), for example. It means that elasticity does not decrease or is suppressed.
- these two O-rings 5 1 and 5 2 have a temperature at which the elasticity does not decrease when the high-pressure tank 1 that is neither outgassed nor filled is waiting, that is, when the tank body 2 is at room temperature. Has a special "live".
- the first O-ring 51 which is less susceptible to leakage than the second O-ring 52 at the first temperature
- the first temperature The second O-ring 5 2, which is less likely to leak than the first O-ring 5 1 at a high second temperature, is sealed using both The gas leak from 1 can be effectively suppressed.
- Reference numerals 5 7 and 5 8 in the figure indicate two pack up rings arranged adjacent to each other in the mounting groove 54 in which the first O-ring 51 is mounted.
- the two backup rings 5 7 and 5 8 are arranged on the downstream side (low pressure side) of the first O-ring 51, and one backup ring 5 7 is adjacent to the first O-ring 51.
- a back up ring may be placed in the mounting groove 5 5 of the second O-ring 5 2.
- the sealing means 50 interposed between the base 3 and the valve body 4 has two O-rings 5 1, 5 having different temperature characteristics. It consists of two. For this reason, the elasticity of the other 0 ring (5 2 or 5 1) is ensured even in a temperature environment where the elasticity of one O ring (51 or 52) decreases. Become.
- the gap between the base 3 and the valve body 4 should be hermetically sealed by one of the two O-rings 5 1 and 5 2. Can do. Therefore, by effectively utilizing the existing O-ring, the sealing property between the base 3 and the valve body 4 can be appropriately secured in a wide temperature range.
- the high-pressure tank 1 when the high-pressure tank 1 is applied to, for example, a fuel cell vehicle, the hydrogen gas is released more frequently than the hydrogen gas is charged. In other words, the frequency in the low-pressure tank 1 is lower when the temperature is lower than when the temperature is high.
- the first O-ring 51 having low temperature resistance is provided on the inner side when viewed from the inside of the high-pressure tank 1, it is possible to appropriately ensure the sealing performance corresponding to the frequently used one.
- the gas permeability of the two O-rings 5 1 and 5 2 is different, and the second O-ring 5 2 with high gas permeability is seen from inside the high-pressure tank 1 than the first O-ring 5 1. Provided outside. For this reason, gas accumulation between the O-rings (between 51 and 52) can be prevented appropriately.
- the sealing means 50 is composed of the two O-rings 51 and 52, but may be composed of lip packing or gasket. Two O-rings 5 1 and 5 2 are both used as shaft seals. Of course, end face seals may be used together.
- the second O-ring 5 2 can be hermetically sealed between the lower end surface 4 4 of the exposed portion 4 2 of the valve body 4 and the upper end surface 3 4 of the flange portion 3 2 of the base 3. .
- a gasket may be used instead of the O-ring.
- the sealing means 50 may include three or more sealing materials having different temperature characteristics.
- first O-ring 5 1 and the second O-ring 52 may be reversed, and the second O-ring 52 having high temperature resistance is provided on the inside from the inside of the high-pressure tank 1. May be.
- a structure in which the backup rings 5 7 and 5 8 are not used together can be adopted.
- the seal structure of the high-pressure tank 1 according to the second embodiment will be described with reference to FIG.
- the difference from the first embodiment is that the two O-rings 5 1 and 5 2 of the sealing means 50 are arranged in a common mounting groove 61.
- the common mounting groove 6 1 the first O-ring 5 1, the second O-ring 5 2, and the two pack-up rings 5 7, 5 of the above-mentioned properties are arranged in order from the upstream side of the high-pressure tank 1. 8 are arranged adjacent to each other.
- the space efficiency around these seals can be improved and the weight can be reduced.
- the arrangement order of the first O-ring 51 and the second O-ring 52 may be reversed, or two or more O-rings (sinore materials) may be used.
- backup rings 5 7 and 5 8 are provided on both sides of these seals. Also good.
- the seal structure of the high-pressure tank 1 according to the third embodiment will be described.
- the main difference from the first embodiment is that the material forming the two O-rings 51 and 52 of the sealing means 50 is changed.
- the combination of the materials of the two O-rings 5 1 and 5 2 is preferably selected in consideration of the temperature change in the high-pressure tank 1, and in this case, the gas filled in the high-pressure tank 1 is selected. It is preferable to select according to the type and pressure.
- the combination of the first embodiment described above that is, the combination in which the first O-ring 51 is formed of IIR and the second O-ring 52 is formed of EP DM is filled with hydrogen gas of 35 MPa. It is effective in some cases. However, when filling 7 OMPa of hydrogen gas, it is necessary to withstand the low temperature during gas release compared to 35 Mpa, and an O-ring made of a material with better low-temperature characteristics than IIR is required. It is preferable to use it.
- the first O-ring 51 having low temperature resistance is formed of silicone having a lower temperature characteristic than IIR
- the second O-ring 52 having high temperature resistance is formed by EP DM. Forming.
- the first O-ring 51 made of silicone does not decrease in elasticity even in a temperature environment of, for example, 150 ° C. or less where I IR or E P DM loses elasticity, and can secure adhesion.
- the O-ring 51 made of silicone has higher gas permeability of hydrogen gas than the O-ring 52 made of EP DM, it is considered that there is a concern about the sealing performance.
- the adhesion between the O-rings 5 1 and 5 2 and the valve body 4 and the material permeability of the O-rings 5 1 and 5 2 itself Both of these must be considered.
- EP DM loses its elasticity when considered in terms of overall hydrogen permeation.
- the silicone O-ring 51 has a higher sealing performance than the EP DM O-ring 52, so that gas leakage can be appropriately suppressed.
- the first O-ring 51 is disposed outside the second O-ring 52 as viewed from inside the high-pressure tank 1.
- the first O-ring 5 which has higher gas permeability than the second O-ring 5 2
- two back up rings 5 7 and 5 8 are arranged adjacent to each other, but the number and arrangement of the pack-up rings are not limited to this. .
- the seal structure of the high-pressure tank 1 according to the fourth embodiment will be described with reference to FIG.
- the main difference from the first embodiment is that the diameter of the valve body 4 is changed and the arrangement positions of the O-rings 51 and 52 as the sealing means 50 are changed.
- the pulp body 4 has a plurality of locations with different diameters when viewed in the axial direction.
- the cylindrical portion 40 of the valve body 4 includes a screw portion in which a male screw 48 is formed, a small diameter portion 10 0 1 located on the inner side of the tank body 2 with respect to the male screw 48, and a screw 4 And a large-diameter portion 10 2 located on the outer side of the tank body 2 with respect to 8.
- the effective diameter of the male screw 48 is set to be larger than the outer diameter D 1 of the small diameter portion 100 1 and smaller than the outer diameter D 2 of the large diameter portion 100 2. 1389
- the two O-rings 5 1 and 5 2 are made of I IR and E P DM, respectively, and are arranged on both sides of the male screw 48 in the axial direction. Specifically, the first O-ring 5 1 is mounted together with the pack up ring 1 1 1 in the mounting groove 5 4 formed in the small diameter portion 101. On the other hand, the second O-ring 5 2 is mounted together with the knock-up ring 1 1 2 in a mounting groove 55 formed in the large diameter portion 102. As described above, since the outer diameter D 1 of the small-diameter portion 1001 is smaller than the outer diameter D2 of the large-diameter portion 1002, the first O-ring 51 is larger in diameter than the second O-ring 52. Is getting smaller.
- the pulp body 4 may have a non-uniform temperature distribution in the axial direction.
- the two O-rings 5 1 and 5 2 apart from each other in the axial direction of the valve body 4, compared with the case where they are concentrated on one end side of the male screw 48, The influence of the temperature distribution of the pulp body 4 can be preferably avoided. As a result, it is possible to achieve both the fastening performance with the male screw 4 8 and the sealing performance with the two O-rings 5 1 and 5 2.
- the diameter of the valve body 4 in the axial direction is set as described above, when the valve body 4 fitted with the O-rings 5 1 and 5 2 is screwed into the base 3, the O-ring 5 1 Sliding on the screw 3 8 can be suppressed. As a result, the durability of the O-ring 51 can be enhanced.
- the gas permeability of the outer O-ring 5 2 is higher than that of the inner O-ring 5 1, so the gas silence between the female screw 3 8 and male screw 4 8 is suitably suppressed at low temperature and low pressure. You can do it.
- the materials of the two O-rings 5 1 and 5 2 described in the third embodiment can be applied.
- the O-ring on the small diameter part 1 0 1 side is EP DM can be formed, and the O-ring on the large diameter part 102 can be made of silicone.
- the sealing structure of the high-pressure tank 1 is an example in which a sealing material (the first O-ring 5 1 or the second O-ring 5 2) is disposed between the base 3 and the valve body 4. As described above, of course, this seal structure (seal means 50) can be applied to other parts of the high-pressure tank 1.
- seal material 8 1 and 8 2 for shaft sealing are provided between the surface (opening edge) and the outer peripheral surface of the base 4, two seal materials 8 1 and 8 2 for shaft sealing.
- One seal material 8 1 has the same properties (for example, IIR material) as the O-ring 51, for example, and the other seal material 8 2 has the same property (for example, EP DM material, etc.) as the O-ring 52.
- the sealing material 81 may be formed of EPDM and the sealing material 82 may be formed of silicone.
- the opening 70 is mainly configured on the inner peripheral side of the return portion 71 that ensures the strength of the liner 20.
- the sealing means 50 of the present invention is shown in the figure. It can be applied to other omitted parts.
- the sealing means 50 is provided between the opening edge of the opening and the outer peripheral surface of the valve body 4.
- a sealing means 50 may be provided between the opening edge of the opening and the outer peripheral surface of the base 3.
- a sealing means 50 may be provided between the opening edge of the opening and the outer peripheral surface of the valve body 4.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Gasket Seals (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112006000286T DE112006000286B4 (de) | 2005-02-02 | 2006-01-24 | Dichtungssystem für einen Hochdrucktank |
US11/794,139 US7971852B2 (en) | 2005-02-02 | 2006-01-24 | Seal structure of high-pressure tank |
JP2007501549A JP4715841B2 (ja) | 2005-02-02 | 2006-01-24 | 高圧タンクのシール構造 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-026644 | 2005-02-02 | ||
JP2005026644 | 2005-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006082765A1 true WO2006082765A1 (ja) | 2006-08-10 |
Family
ID=36777150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/301389 WO2006082765A1 (ja) | 2005-02-02 | 2006-01-24 | 高圧タンクのシール構造 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7971852B2 (ja) |
JP (1) | JP4715841B2 (ja) |
DE (1) | DE112006000286B4 (ja) |
WO (1) | WO2006082765A1 (ja) |
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US7896023B2 (en) | 2007-07-17 | 2011-03-01 | GM Global Technology Operations LLC | Fuel leakage vent for fuel source and valve interface |
WO2015008598A1 (ja) * | 2013-07-19 | 2015-01-22 | 日立建機株式会社 | 装軌式車両の転輪装置 |
CN105605412A (zh) * | 2014-11-14 | 2016-05-25 | 丰田自动车株式会社 | 高压罐 |
JP2017180521A (ja) * | 2016-03-28 | 2017-10-05 | 株式会社有沢製作所 | 圧力容器 |
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- 2006-01-24 JP JP2007501549A patent/JP4715841B2/ja not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008026784A1 (fr) * | 2006-09-01 | 2008-03-06 | Toyota Jidosha Kabushiki Kaisha | Réservoir d'hydrogène comprimé |
US7896023B2 (en) | 2007-07-17 | 2011-03-01 | GM Global Technology Operations LLC | Fuel leakage vent for fuel source and valve interface |
JP2009281409A (ja) * | 2008-05-19 | 2009-12-03 | Jtekt Corp | 流体供給弁組付装置 |
WO2015008598A1 (ja) * | 2013-07-19 | 2015-01-22 | 日立建機株式会社 | 装軌式車両の転輪装置 |
CN105605412A (zh) * | 2014-11-14 | 2016-05-25 | 丰田自动车株式会社 | 高压罐 |
JP2017180521A (ja) * | 2016-03-28 | 2017-10-05 | 株式会社有沢製作所 | 圧力容器 |
Also Published As
Publication number | Publication date |
---|---|
DE112006000286T5 (de) | 2008-04-10 |
JP4715841B2 (ja) | 2011-07-06 |
US7971852B2 (en) | 2011-07-05 |
JPWO2006082765A1 (ja) | 2008-06-26 |
DE112006000286B4 (de) | 2012-02-09 |
US20080111322A1 (en) | 2008-05-15 |
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