WO2020090180A1 - 密封装置 - Google Patents
密封装置 Download PDFInfo
- Publication number
- WO2020090180A1 WO2020090180A1 PCT/JP2019/030749 JP2019030749W WO2020090180A1 WO 2020090180 A1 WO2020090180 A1 WO 2020090180A1 JP 2019030749 W JP2019030749 W JP 2019030749W WO 2020090180 A1 WO2020090180 A1 WO 2020090180A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sealing device
- inner peripheral
- peripheral side
- resin seal
- outer peripheral
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
- F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3224—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip capable of accommodating changes in distances or misalignment between the surfaces, e.g. able to compensate for defaults of eccentricity or angular deviations
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a sealing device provided in an exhaust gas recirculation device.
- FIG. 10 is a schematic sectional view of a sealing structure including a sealing device according to a conventional example.
- the sealing device 700 plays a role of sealing an annular gap between the rotary shaft 200 and the housing 300.
- the sealing device 700 includes a metal ring 710, a resin seal 720, a leaf spring 730, and a metal fixed ring 740 fixed to the inner peripheral surface side of the metal ring 710.
- the leaf spring 730 is fixed to the metal ring 710 on the outer peripheral side and is deformed so that the inner peripheral side is curved along the resin seal 720, and the vicinity of the inner peripheral end of the resin seal 720 is radially inward. It is configured to press toward. According to the sealing device 700 configured as described above, even when the resin seal 720 itself becomes fatigued by being used for a long time in a high temperature environment, stable sealing performance is maintained for a long time. be able to.
- the rotating shaft 200 may be eccentric to the housing 300 with high frequency (see arrow P in the figure).
- the follow-up operation (see arrow Q in the figure) of the inner peripheral end of the resin seal 720 may catch up with the eccentric operation of the rotating shaft 200.
- the sealing property becomes unstable.
- the structure in which the bearing is provided separately from the sealing device is adopted, the installation space is unnecessarily increased and the cost is increased.
- An object of the present invention is to provide a sealing device capable of suppressing eccentricity of a rotating shaft without providing a bearing separately from the sealing device.
- the present invention adopts the following means in order to solve the above problems.
- the sealing device of the present invention In the sealing device provided in the exhaust gas recirculation device that recirculates a part of the exhaust gas to the intake air, A sealing device for sealing an annular gap between a rotary shaft that rotates a valve body of a control valve that controls the amount of exhaust gas to be recirculated, and a housing having a shaft hole of the rotary shaft, A metal ring having a cylindrical portion fitted in a state of being in close contact with the inner peripheral surface of the shaft hole, and an inward flange portion provided at an end portion of the cylindrical portion, It is composed of a plate-shaped and annular resin member, the outer peripheral side is fixed to the metal ring, and the inner peripheral side is slidable on the outer peripheral surface of the rotating shaft in a deformed state so as to curve toward the sealing target region side.
- a resin seal that sticks closely It is composed of a plate-shaped and annular metal member, the outer peripheral side is fixed to the metal ring, the inner peripheral side is deformed so as to curve along the resin seal, and the inner peripheral side of the resin seal is radially inside.
- a resin seal that sticks closely It is composed of a plate-shaped and annular metal member, the outer peripheral side is fixed to the metal ring, the inner peripheral side is deformed so as to curve along the resin seal, and the inner peripheral side of the resin seal is radially inside.
- the sealing device of the present invention is composed of a plate-shaped and annular resin member, and is made of a resin that slidably adheres to the outer peripheral surface of the rotary shaft in a state where the inner peripheral side is deformed to be curved toward the sealing target area side.
- a structure with a seal is adopted.
- the sealing device of the present invention includes the leaf spring that presses the inner peripheral side of the resin seal toward the inner side in the radial direction, even if the resin seal itself is depressed, it is stable for a long period of time. The sealed property can be maintained. Further, according to the present invention, since the sealing device is provided with the slide bearing, the eccentricity of the rotating shaft can be suppressed without providing a bearing separately from the sealing device.
- the eccentricity of the rotating shaft can be suppressed without providing a bearing separately from the sealing device.
- FIG. 1 is a schematic configuration diagram of an internal combustion engine including an exhaust gas recirculation device.
- FIG. 2 is a schematic configuration diagram of the control valve.
- FIG. 3 is a plan view of the sealing device according to the first embodiment of the present invention.
- FIG. 4 is a bottom view of the sealing device according to the first embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view of the sealing device according to the first embodiment of the present invention.
- FIG. 6 is a plan view of the leaf spring according to the first embodiment of the present invention.
- FIG. 7 is a schematic sectional view showing a sealing structure including the sealing device according to the first embodiment of the present invention.
- FIG. 8 is a partially cutaway perspective view showing a usage state of the sealing device according to the first embodiment of the present invention.
- FIG. 9 is a schematic sectional view showing a sealing structure including a sealing device according to the second embodiment of the present invention.
- FIG. 10 is a schematic sectional view of a sealing structure including
- the sealing device according to the present embodiment is provided in an exhaust gas recirculation device (hereinafter, referred to as an EGR device) that recirculates a part of exhaust gas to intake air.
- an EGR device an exhaust gas recirculation device
- FIGS. 1 and 2 Prior to the description of the sealing device according to the present embodiment, the EGR device will be described with reference to FIGS. 1 and 2.
- FIG. 1 is a schematic configuration diagram of an internal combustion engine including an EGR device.
- FIG. 2 is a schematic configuration diagram of a control valve provided in the EGR device.
- an intake pipe 510 and an exhaust pipe 520 are connected to the internal combustion engine 500.
- An EGR device is provided to control the generation of NO X by recirculating a part of the exhaust gas to the intake air.
- the EGR device includes an EGR passage 530 and a control valve (EGR valve) 600 provided on the EGR passage 530.
- the control valve 600 has a function of controlling the amount of exhaust gas to be recirculated.
- the arrows in FIG. 1 indicate the directions of intake and exhaust flow.
- the control valve 600 includes a rotary shaft 200 that rotates the valve body 220, and a housing 300 having a shaft hole of the rotary shaft 200 (see FIG. 2).
- the rotating shaft 200 is configured to rotate by the rotating mechanism 210. Then, in order to prevent the exhaust gas flowing through the EGR passage 530 from leaking to the outside of the EGR passage 530, the sealing device 100 that seals the annular gap between the rotary shaft 200 and the housing 300 is provided. ..
- FIG. 3 is a plan view of the sealing device according to the first embodiment of the present invention.
- FIG. 4 is a bottom view of the sealing device according to the first embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view of the sealing device according to the first embodiment of the present invention. Note that FIG. 5 is a cross-sectional view taken along the line AA in FIG.
- FIG. 6 is a plan view of the leaf spring according to the first embodiment of the present invention.
- FIG. 7 is a schematic cross-sectional view showing a sealing structure (a used state of the sealing device) including the sealing device according to the first embodiment of the present invention.
- FIG. 8 is a partially cutaway perspective view showing a usage state of the sealing device according to the first embodiment of the present invention. Note that FIG. 8 is a diagram schematically showing a state in which the vicinity of the cross section of the sealing device according to the first embodiment of the present invention is cut, as viewed obliquely. Further, in FIG. 8, the shaft and the housing are omitted in the state when the sealing device according to the first embodiment of the present invention is used.
- the sealing device 100 includes a metal ring 110, a resin seal 120, a leaf spring 130, a metal plain bearing 140, and a metal fixing member fixed to the inner peripheral surface side of the metal ring 110. And a ring 150.
- the metal ring 110 includes a cylindrical portion 111 that is fitted in close contact with the inner peripheral surface of the shaft hole provided in the housing 300. Further, the metal ring 110 is formed with an inward flange portion 112 provided at an end portion on one end side of the cylindrical portion 111 and a crimp formed by being bent inward in the radial direction on the other end side of the cylindrical portion 111. And a section 113 are provided.
- the “one end side” corresponds to the opposite side (low pressure side (L)) to the sealing target area
- the “other end side” is the sealing target area side (high pressure side). Side (H)).
- the resin seal 120 is composed of a plate-shaped and annular resin member.
- PTFE polytetrafluoroethylene
- This PTFE has characteristics that it is excellent in heat resistance, pressure resistance, and chemical resistance, and has little sliding wear.
- the resin seal 120 according to the present embodiment has the outer peripheral side fixed to the metal ring 110 and the inner peripheral side deformed so as to curve toward the sealing target region side (high pressure side (H)). It is configured so as to slidably adhere to the outer peripheral surface of 200.
- the leaf spring 130 is composed of a plate-shaped and annular metal member. Further, the leaf spring 130 is fixed to the metal ring 110 on the outer peripheral side and deforms so that the inner peripheral side is curved along the resin seal 120, and the vicinity of the end portion on the inner peripheral side of the resin seal 120 is radially inward. It is configured to press toward. Further, the leaf spring 130 is provided with a plurality of inner circumferential slits 131 extending from the inner circumferential end toward the outer circumferential end side at intervals in the circumferential direction. In the present embodiment, the plurality of inner circumferential slits 131 are provided at equal intervals in the circumferential direction. Note that the configuration of the leaf spring 130 shown in this embodiment is merely an example. For the leaf spring according to the present invention, for example, in addition to the configuration disclosed in FIG. 11 of Patent Document 1 described above, various known techniques can be adopted.
- the plain bearing 140 is composed of an annular member made of metal such as SUS.
- the slide bearing 140 is sandwiched between the resin seal 120 and the inward flange portion 112 of the metal ring 110, and is slidably provided on the outer peripheral surface of the rotary shaft 200. As a result, eccentricity of the rotary shaft 200 with respect to the housing 300 is suppressed. Since the plain bearing 140 according to the present embodiment is made of metal such as SUS as described above, it is excellent in heat resistance and condensed water resistance and maintains quality even when applied to an EGR device.
- the fixed ring 150 is composed of a cylindrical portion 151 fixed to the inner peripheral surface side of the metal ring 110, and an inward flange portion 152 provided on one end side of the cylindrical portion 151. Then, with the fixed ring 150 arranged on the inner peripheral surface side of the metal ring 110, the diameter of the metal ring 110 so that the end portion on the other end side (sealing target region side) abuts the end portion of the fixed ring 150.
- the caulking portion 113 is formed by being bent inward in the direction. As a result, the outer peripheral end of the resin seal 120, the outer peripheral end of the leaf spring 130, and the slide bearing 140 are compressed between the inward flange 112 and the fixed ring 150. The outer peripheral side of the resin seal 120, the outer peripheral side of the leaf spring 130, and the slide bearing 140 are fixed to the metal ring 110.
- ⁇ Installation method of sealing device and condition when used> a mounting method of the sealing device 100 according to the present embodiment and a state during use will be described.
- a method of mounting the sealing device 100 will be described.
- the sealing device 100 configured as described above is inserted into the shaft hole provided in the housing 300 and fitted into the shaft hole.
- the outer peripheral surface of the cylindrical portion 111 of the metal ring 110 in the sealing device 100 is in close contact with the inner peripheral surface of the shaft hole.
- the rotary shaft 200 is inserted from the left side in FIG.
- the inner peripheral surface near the tip of the curved portion of the leaf spring 130 is in close contact with the outer peripheral surface near the tip of the curved portion of the resin seal 120. Then, due to the elastic restoring force of the leaf spring 130, the portion near the tip of the leaf spring 130 presses the vicinity of the tip in the curved portion of the resin seal 120 radially inward.
- the sealing device 100 according to the present embodiment employs a configuration including a metal ring 110 having a cylindrical portion 111 that is fitted in close contact with the inner peripheral surface of the shaft hole provided in the housing 300.
- a casting for example, a casting made of aluminum
- sufficient sealing performance is provided between the outer peripheral surface of the metal ring 110 and the inner peripheral surface of the shaft hole of the housing 300.
- Obtainable That is, even if there are a plurality of minute recesses such as cast holes on the inner peripheral surface of the shaft hole of the housing 300, the sealing performance can be exhibited.
- the sealing device 100 is configured by a plate-shaped and annular resin member, the outer peripheral side is fixed to the metal ring 110, and the inner peripheral side is deformed to be curved toward the sealing target region side.
- a configuration is adopted in which a resin seal 120 that slidably adheres to the outer peripheral surface of the rotating shaft 200 is provided.
- the sealing device 100 includes the leaf spring 130 that presses the inner peripheral side of the resin seal 120 toward the inner side in the radial direction. Therefore, even if the resin seal 120 itself becomes fatigued by being used for a long time in a high temperature environment, it is possible to maintain stable hermeticity for a long period of time.
- the sealing device 100 since the sliding device 140 is provided in the sealing device 100, it is possible to suppress the eccentricity of the rotating shaft 200 without providing a bearing separately from the sealing device 100. it can. As a result, it is possible to suppress a reduction in sealing performance due to the eccentricity of the rotary shaft 200, and at the same time, prevent an increase in installation space and cost.
- Example 2 of the present invention is shown in FIG.
- the structure relating to the slide bearing is different from that of the first embodiment. Since other configurations and operations are the same as those of the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be appropriately omitted.
- FIG. 9 is a schematic cross-sectional view showing a sealing structure (a used state of the sealing device) including the sealing device according to the second embodiment of the present invention.
- the sealing device 100 according to the present embodiment includes a metal ring 110, a resin seal 120, a leaf spring 130, a metal annular spacer 141, a resin slide bearing 142, and an inner peripheral surface of the metal ring 110. And a metal fixed ring 150 fixed to the side.
- the metal ring 110, the resin seal 120, the leaf spring 130, and the fixed ring 150 have the same configurations as those in the first embodiment, and therefore their explanations are omitted.
- the spacer 141 is composed of an annular member made of metal such as SUS.
- the spacer 141 is sandwiched between the resin seal 120 and the inward flange portion 112 of the metal ring 110. Since the spacer 141 is made of a metal such as SUS as described above, it has excellent heat resistance and condensed water resistance, and its quality is maintained even when applied to an EGR device.
- the slide bearing 142 is made of a resin annular member.
- the slide bearing 142 is provided on the inner peripheral surface side of the spacer 141, sandwiched between the resin seal 120 and the inward flange portion 112 of the metal ring 110, and is slidable on the outer peripheral surface of the rotating shaft 200. It is provided in. As a result, eccentricity of the rotary shaft 200 with respect to the housing 300 is suppressed.
- the sealing device 100 according to this embodiment configured as described above, it is possible to obtain the same effect as that of the above-described first embodiment.
- the slide bearing 142 is made of a resin material, the sliding resistance can be reduced as compared with the case of the first embodiment.
- the slide bearing 142 according to the present embodiment has inferior heat resistance and the like as compared with the metal slide bearing 140 in the above-mentioned Embodiment 1, but when the slide bearing 142 deteriorates, the spacer 141 remains fixed. Since the plain bearing 142 can be replaced, there is no problem even if it is applied to an EGR device.
- the sliding bearing 142 can be simplified by contracting the sliding bearing 142 inward in the radial direction at the time of replacement. It can be removed and attached to.
- an abutment portion for example, a bias cut
- Sealing device 110 Metal ring 111 Cylinder part 112 Inward flange part 113 Caulking part 120 Resin seal 130 Leaf spring 131 Inner peripheral slit 140 Bearing 141 Spacer 142 Bearing 150 Fixed ring 151 Cylindrical part 152 Inward flange part 200 Rotating shaft 210 Rotation Mechanism 220 Valve Body 300 Housing 500 Internal Combustion Engine 510 Intake Pipe 520 Exhaust Pipe 530 EGR Passage 600 Control Valve
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Abstract
Description
吸気に排気の一部を還流する排気再循環装置に備えられる密封装置において、
還流させる排気の量を制御する制御弁の弁体を回転させる回転軸と、該回転軸の軸孔を有するハウジングとの間の環状隙間を封止する密封装置であって、
前記軸孔の内周面に密着した状態で嵌合される円筒部と、該円筒部の端部に設けられる内向きフランジ部とを有する金属環と、
板状かつ環状の樹脂部材により構成され、外周側が前記金属環に固定されて、内周側が密封対象領域側に向かって湾曲するように変形した状態で前記回転軸の外周面に摺動自在に密着する樹脂製シールと、
板状かつ環状の金属部材により構成され、外周側が前記金属環に固定されて、内周側が前記樹脂製シールに沿って湾曲するように変形し、該樹脂製シールの内周側を径方向内側に向かって押圧する板バネと、
前記樹脂製シールと前記内向きフランジ部との間に挟み込まれ、かつ、前記回転軸の外周面に摺動自在に設けられる金属製のすべり軸受と、
を備えることを特徴とする。
吸気に排気の一部を還流する排気再循環装置に備えられる密封装置において、
還流させる排気の量を制御する制御弁の弁体を回転させる回転軸と、該回転軸の軸孔を有するハウジングとの間の環状隙間を封止する密封装置であって、
前記軸孔の内周面に密着した状態で嵌合される円筒部と、該円筒部の端部に設けられる内向きフランジ部とを有する金属環と、
板状かつ環状の樹脂部材により構成され、外周側が前記金属環に固定されて、内周側が密封対象領域側に向かって湾曲するように変形した状態で前記回転軸の外周面に摺動自在に密着する樹脂製シールと、
板状かつ環状の金属部材により構成され、外周側が前記金属環に固定されて、内周側が前記樹脂製シールに沿って湾曲するように変形し、該樹脂製シールの内周側を径方向内側に向かって押圧する板バネと、
前記樹脂製シールと前記内向きフランジ部との間に挟み込まれる金属製の環状のスペーサと、
前記スペーサの内周面側に備えられ、前記樹脂製シールと前記内向きフランジ部との間に挟み込まれ、かつ、前記回転軸の外周面に摺動自在に設けられる樹脂製のすべり軸受と、
を備えることを特徴とする。
<密封装置>
図3~図8を参照して、本発明の実施例1に係る密封装置100の構成について説明する。図3は本発明の実施例1に係る密封装置の平面図である。図4は本発明の実施例1に係る密封装置の底面図である。図5は本発明の実施例1に係る密封装置の模式的断面図である。なお、図5は図4中のAA断面図である。図6は本発明の実施例1に係る板バネの平面図である。図7は本発明の実施例1に係る密封装置を備える密封構造(密封装置の使用状態)を示す模式的断面図である。図8は本発明の実施例1に係る密封装置の使用状態を示す一部破断斜視図である。なお、図8は、本発明の実施例1に係る密封装置を切断した断面付近を斜めから見た様子を模式的に示した図である。また、図8においては、本発明の実施例1に係る密封装置の使用時の状態について、軸及びハウジングを省略して示している。
特に、図7及び図8を参照して、本実施例に係る密封装置100の装着方法及び使用時の状態について説明する。まず、密封装置100の装着方法について説明する。上記のように構成される密封装置100は、ハウジング300に設けられた軸孔内に挿入され、この軸孔内に嵌合される。このとき、密封装置100における金属環110の円筒部111の外周面が、軸孔の内周面に密着した状態となる。そして、回転軸200が図7中左側(使用時における密封対象領域とは反対側(低圧側(L)))から右側(使用時における密封対象領域側(高圧側(H)))に挿入される。これにより、樹脂製シール120及び板バネ130は、その内周側の端部が回転軸200に押される。そのため、これら樹脂製シール120及び板バネ130は、すべり軸受140と固定環150との間に圧縮されている位置よりも内周側が密封対象領域側(高圧側(H))に向かって湾曲するように変形する。これにより、樹脂製シール120の湾曲した部分における先端付近の内周面が回転軸200の外周面に密着した状態となる。また、板バネ130の湾曲した部分における先端付近の内周面が、樹脂製シール120の湾曲した部分における先端付近の外周面に密着した状態となる。そして、板バネ130の弾性復元力によって、板バネ130の先端付近の部分により、樹脂製シール120の湾曲した部分における先端付近が径方向内側に向かって押圧される。
本実施例に係る密封装置100は、ハウジング300に設けられた軸孔の内周面に密着した状態で嵌合される円筒部111を有する金属環110を備える構成を採用している。これにより、ハウジング300が鋳物(例えば、アルミニウム製の鋳物)で構成される場合であっても、金属環110の外周面とハウジング300の軸孔の内周面との間に十分な密封性を得ることができる。つまり、ハウジング300の軸孔の内周面に鋳巣のような微小の凹部が複数存在していても、密封性を発揮させることができる。
図9には、本発明の実施例2が示されている。本実施例においては、すべり軸受に関する構成が、上記実施例1とは異なる場合の構成を示す。その他の構成および作用については実施例1と同一なので、同一の構成部分については同一の符号を付して、その説明は適宜省略する。
110 金属環
111 円筒部
112 内向きフランジ部
113 加締め部
120 樹脂製シール
130 板バネ
131 内周側スリット
140 軸受
141 スペーサ
142 軸受
150 固定環
151 円筒部
152 内向きフランジ部
200 回転軸
210 回転機構
220 弁体
300 ハウジング
500 内燃機関
510 吸気管
520 排気管
530 EGR通路
600 制御弁
Claims (2)
- 吸気に排気の一部を還流する排気再循環装置に備えられる密封装置において、
還流させる排気の量を制御する制御弁の弁体を回転させる回転軸と、該回転軸の軸孔を有するハウジングとの間の環状隙間を封止する密封装置であって、
前記軸孔の内周面に密着した状態で嵌合される円筒部と、該円筒部の端部に設けられる内向きフランジ部とを有する金属環と、
板状かつ環状の樹脂部材により構成され、外周側が前記金属環に固定されて、内周側が密封対象領域側に向かって湾曲するように変形した状態で前記回転軸の外周面に摺動自在に密着する樹脂製シールと、
板状かつ環状の金属部材により構成され、外周側が前記金属環に固定されて、内周側が前記樹脂製シールに沿って湾曲するように変形し、該樹脂製シールの内周側を径方向内側に向かって押圧する板バネと、
前記樹脂製シールと前記内向きフランジ部との間に挟み込まれ、かつ、前記回転軸の外周面に摺動自在に設けられる金属製のすべり軸受と、
を備えることを特徴とする密封装置。 - 吸気に排気の一部を還流する排気再循環装置に備えられる密封装置において、
還流させる排気の量を制御する制御弁の弁体を回転させる回転軸と、該回転軸の軸孔を有するハウジングとの間の環状隙間を封止する密封装置であって、
前記軸孔の内周面に密着した状態で嵌合される円筒部と、該円筒部の端部に設けられる内向きフランジ部とを有する金属環と、
板状かつ環状の樹脂部材により構成され、外周側が前記金属環に固定されて、内周側が密封対象領域側に向かって湾曲するように変形した状態で前記回転軸の外周面に摺動自在に密着する樹脂製シールと、
板状かつ環状の金属部材により構成され、外周側が前記金属環に固定されて、内周側が前記樹脂製シールに沿って湾曲するように変形し、該樹脂製シールの内周側を径方向内側に向かって押圧する板バネと、
前記樹脂製シールと前記内向きフランジ部との間に挟み込まれる金属製の環状のスペーサと、
前記スペーサの内周面側に備えられ、前記樹脂製シールと前記内向きフランジ部との間に挟み込まれ、かつ、前記回転軸の外周面に摺動自在に設けられる樹脂製のすべり軸受と、
を備えることを特徴とする密封装置。
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KR1020217000722A KR102532940B1 (ko) | 2018-10-29 | 2019-08-05 | 밀봉 장치 |
US17/257,085 US11933252B2 (en) | 2018-10-29 | 2019-08-05 | Sealing device |
CN201980044015.9A CN112334688B (zh) | 2018-10-29 | 2019-08-05 | 密封装置 |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5281561U (ja) * | 1975-12-15 | 1977-06-17 | ||
JPH0413867U (ja) * | 1990-05-23 | 1992-02-04 | ||
JPH10204652A (ja) * | 1997-01-22 | 1998-08-04 | Nippon Parkerizing Co Ltd | 多層すべり軸受 |
JP2002323139A (ja) * | 2001-04-23 | 2002-11-08 | Starlite Co Ltd | 軸受兼用シール装置 |
JP2006300191A (ja) * | 2005-04-20 | 2006-11-02 | Eagle Ind Co Ltd | シール装置 |
JP2015203491A (ja) | 2014-04-16 | 2015-11-16 | Nok株式会社 | 密封装置 |
JP2018004030A (ja) * | 2016-07-07 | 2018-01-11 | 愛三工業株式会社 | 二重偏心弁 |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2493255A (en) * | 1943-11-08 | 1950-01-03 | Victor Mfg & Gasket Co | Fluid seal |
US2709098A (en) * | 1951-08-31 | 1955-05-24 | Victor Mfg & Gasket Co | Fluid seal |
DE1525486A1 (de) * | 1965-02-22 | 1969-06-19 | Micus Immobilien Und Finanzier | Dichtung zur Verhinderung des Fluessigkeitsdurchtritts zwischen einem Gehaeuse und einer umlaufenden die Gehaeusewandung durchsetzenden Welle |
CA1039766A (en) * | 1975-01-06 | 1978-10-03 | Dennis N. Denton | Bonded tfe lip seal |
US3973782A (en) * | 1975-01-10 | 1976-08-10 | Aeroquip Corporation | Eccentricity compensating seal |
US4427201A (en) * | 1982-08-30 | 1984-01-24 | Allis-Chalmers Corporation | Double seal having vibration damping and lubricating means |
US4884665A (en) * | 1985-12-24 | 1989-12-05 | Ford Motor Company | Automotive shock absorber with unitary striker plate and closure cap |
JPH0243564U (ja) * | 1988-09-19 | 1990-03-26 | ||
US5176229A (en) * | 1989-09-29 | 1993-01-05 | Atsugi Unisia Corporation | Hydraulic shock absorber with a rod guide having an annular doubled wall section |
DE4324529C1 (de) * | 1993-07-21 | 1994-11-17 | Bruss Dichtungstechnik | Wellendichtring |
DE19915467A1 (de) * | 1999-04-06 | 2000-10-26 | Freudenberg Carl Fa | Radialwellendichtring |
EP1146265A2 (en) * | 2000-04-12 | 2001-10-17 | Mitsubishi Cable Industries, Ltd. | Shaft seal |
JP2003120823A (ja) * | 2001-10-19 | 2003-04-23 | Eagle Ind Co Ltd | シール装置 |
PT2949973T (pt) * | 2006-03-08 | 2017-10-04 | Eagle Ind Co Ltd | Dispositivo de vedação |
DE102006026812B4 (de) * | 2006-06-09 | 2016-04-07 | Ab Skf | Dichtung für einen Kompressor |
JP5100128B2 (ja) * | 2007-01-15 | 2012-12-19 | 三菱電線工業株式会社 | 回転軸シール |
JP2010286014A (ja) | 2009-06-09 | 2010-12-24 | Nok Corp | 油圧シリンダ |
JP5751450B2 (ja) * | 2011-07-09 | 2015-07-22 | Nok株式会社 | バルブステムシール装置 |
EP2594829A1 (en) * | 2011-11-15 | 2013-05-22 | Harald Kofler | Pressure balanced radial rotary shaft seal |
DE102013000982B4 (de) * | 2013-01-22 | 2015-10-29 | Carl Freudenberg Kg | Dichtring und Dichtungsanordnung damit |
US9869395B2 (en) | 2014-02-26 | 2018-01-16 | Garlock Sealing Technologies, Llc | Shaft sealing apparatus and associated methods |
US20160146351A1 (en) * | 2014-06-23 | 2016-05-26 | Robert Janian | Rosette lipseal |
US10337617B2 (en) * | 2015-03-10 | 2019-07-02 | Trelleborg Sealing Solutions Us, Inc. | Canned seal assembly |
JP6925101B2 (ja) * | 2015-08-03 | 2021-08-25 | 三菱電線工業株式会社 | 軸シール |
ITUB20154704A1 (it) * | 2015-10-15 | 2017-04-15 | Skf Ab | Unita di guida e tenuta, in particolare per uno stelo di un ammortizzatore. |
JP6709722B2 (ja) * | 2016-11-24 | 2020-06-17 | 株式会社ダイヤメット | 焼結軸受 |
-
2019
- 2019-08-05 KR KR1020217000722A patent/KR102532940B1/ko active IP Right Grant
- 2019-08-05 CN CN201980044015.9A patent/CN112334688B/zh active Active
- 2019-08-05 JP JP2020554772A patent/JP7080989B2/ja active Active
- 2019-08-05 EP EP19878848.1A patent/EP3875810B1/en active Active
- 2019-08-05 US US17/257,085 patent/US11933252B2/en active Active
- 2019-08-05 WO PCT/JP2019/030749 patent/WO2020090180A1/ja unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5281561U (ja) * | 1975-12-15 | 1977-06-17 | ||
JPH0413867U (ja) * | 1990-05-23 | 1992-02-04 | ||
JPH10204652A (ja) * | 1997-01-22 | 1998-08-04 | Nippon Parkerizing Co Ltd | 多層すべり軸受 |
JP2002323139A (ja) * | 2001-04-23 | 2002-11-08 | Starlite Co Ltd | 軸受兼用シール装置 |
JP2006300191A (ja) * | 2005-04-20 | 2006-11-02 | Eagle Ind Co Ltd | シール装置 |
JP2015203491A (ja) | 2014-04-16 | 2015-11-16 | Nok株式会社 | 密封装置 |
JP2018004030A (ja) * | 2016-07-07 | 2018-01-11 | 愛三工業株式会社 | 二重偏心弁 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3875810A4 |
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US20210363945A1 (en) | 2021-11-25 |
EP3875810A1 (en) | 2021-09-08 |
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