KR20110041263A - Flap valve for egr of a vehicle - Google Patents

Flap valve for egr of a vehicle Download PDF

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Publication number
KR20110041263A
KR20110041263A KR1020090098351A KR20090098351A KR20110041263A KR 20110041263 A KR20110041263 A KR 20110041263A KR 1020090098351 A KR1020090098351 A KR 1020090098351A KR 20090098351 A KR20090098351 A KR 20090098351A KR 20110041263 A KR20110041263 A KR 20110041263A
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KR
South Korea
Prior art keywords
sealing member
shaft
flap valve
cap
valve
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KR1020090098351A
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Korean (ko)
Inventor
김광주
박상준
박천수
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한국델파이주식회사
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Priority to KR1020090098351A priority Critical patent/KR20110041263A/en
Publication of KR20110041263A publication Critical patent/KR20110041263A/en

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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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/222—Shaping of the valve member
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2268—Sealing means for the axis of rotation
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Lift Valve (AREA)

Abstract

PURPOSE: A flap valve for EGR of a vehicle is provided to make stable fluid leakage effect without damage to a sealing part, which is made of carbon material, in spite of high temperature environment. CONSTITUTION: A flap valve for EGR of a vehicle comprises valve body(100), a valve plate(200), a cap(120), a spring(130) and sealing members(140, 141). The valve body comprises a flow path and fixing cavity. The valve plate is fixed and coupled with the shaft inserted through the fixing cavity. The cap closes the outermost of the fixing cavity. The spring is supported between the cap and sealing member. The spring pressurizes the sealing member. The sealing member is combined in the circumference of the shaft. The sealing member is made of a carbon material. The sealing member is respectively installed in the inside and outside of a ring protrusion(110a). The ring protrusion is formed in the circumference of the shaft.

Description

자동차 ＥＧＲ용 플랩 밸브{Flap valve for EGR of a vehicle}Flap valve for EGR of automobiles

본 발명은 자동차 EGR용 플랩 밸브에 관한 것으로서, 보다 상세하게는 고온의 작동환경에서도 밸브의 밀폐력을 향상시켜 안정적인 유체 누출방지 효과를 얻을 수 있는 자동차 EGR용 플랩 밸브에 관한 것이다.The present invention relates to a flap valve for automobile EGR, and more particularly to a flap valve for automobile EGR that can achieve a stable fluid leakage prevention effect by improving the sealing force of the valve in a high temperature operating environment.

일반적으로, 질소산화물(NOx)은 고압, 고온 시에 산소와 질소가 결합하여 발생하는 것으로, 이를 억제하기 위하여 대기중으로 배출되는 배기가스 일부를 다시 흡기계통측에 공급하여 최고 연소온도를 낮추고, 산소 공급을 줄여 질소산화물의 생성을 저감시키는 EGR(exhaust gas recirculation) 시스템이 사용된다.In general, nitrogen oxides (NOx) are generated by combining oxygen and nitrogen at high pressure and high temperature. In order to suppress this, nitrogen oxide (NOx) is supplied to a part of the exhaust gas discharged into the atmosphere again to lower the maximum combustion temperature, and oxygen An exhaust gas recirculation (EGR) system is used that reduces the supply and thus reduces the production of nitrogen oxides.

상기 EGR 시스템에서 대기중으로 배출되는 배기가스 일부를 다시 흡기계통측에 공급하는 배기가스의 양에 따라 연료의 연소상태가 좌우됨으로 엔진의 출력과 배출가스에 함유되는 질소산화물(NOx)과 입자상 물질(PM) 등에 영향을 미친다. The combustion state of the fuel depends on the amount of exhaust gas supplied back to the intake cylinder side of the exhaust gas discharged to the atmosphere from the EGR system, so that NOx and particulate matter contained in the engine output and exhaust gas ( PM) and the like.

상기와 같이 EGR 시스템에서는 리턴되는 배기가스의 양이 중요시되며, 상기 리턴되는 배기가스를 제어하는 것이 EGR 밸브이다. As described above, in the EGR system, the amount of returned exhaust gas is important, and the controlling of the returned exhaust gas is an EGR valve.

도 1은 종래의 EGR 시스템에서 사용되는 EGR용 버터플라이밸브를 도시하는 단면도이다. 도 1에 도시된 바와 같이, 종래기술에 의한 EGR용 버터플라이밸브는 하우징(22)의 일측에 브래킷(24)이 결합되고, 상기 하우징(22)의 내부에는 상기 배기 파이프(16)를 개폐하는 차단판(26)이 설치된다. 또한, 상기 하우징(22) 및 브래킷(24)을 관통하여 회전축(28)이 회전 가능하게 결합되고, 상기 회전축(28)의 중단부에는 상기 차단판(26)이 결합되고, 그 타단부에는 소정의 레버(30)가 힌지 결합되어 액추에이터의 로드(42)와 연결된 구성으로 되어 있었다.1 is a cross-sectional view showing a butterfly valve for an EGR used in a conventional EGR system. As shown in FIG. 1, a butterfly valve for an EGR according to the related art has a bracket 24 coupled to one side of a housing 22, and opens and closes the exhaust pipe 16 inside the housing 22. The blocking plate 26 is installed. In addition, the rotating shaft 28 is rotatably coupled through the housing 22 and the bracket 24, and the blocking plate 26 is coupled to the stop portion of the rotating shaft 28, and the other end thereof is predetermined. The lever 30 of the hinge was coupled to the configuration connected to the rod 42 of the actuator.

이와 같은 종래의 EGR용 버터플라이밸브는 하우징(22)을 관통하여 설치되는 회전축(28)과 하우징(22) 사이의 틈새 간격을 통해 내부의 유체가 누출되는 것을 방지하기 위하여 회전축(28)의 양단부에 단턱을 형성하고 상기 단턱에 부싱(bushing)과 씰(seal)을 결합하여 밀폐력을 유지하였는바, 이러한 종래의 밀폐구조는 하우징(22)과 회전축(28) 사이를 밀폐하는 씰의 재질이 통상 플랙서블(flexible)한 재질의 고무나 테프론(teflon) 등으로 사용되었기 때문에 고온의 열에 상대적으로 취약하여 고온의 작동환경에서 사용될 경우 씰이 파손 우려가 있고 유체의 누출방지 효과를 저감시키게 되는 문제가 있었다.The conventional butterfly valve for EGR is provided at both ends of the rotary shaft 28 to prevent the fluid from leaking through the gap between the rotary shaft 28 and the housing 22 installed through the housing 22. Forming a step in the step and the bushing (bushing) and the seal (seal) to the coupling to maintain the sealing force, this conventional sealing structure is a material of the seal that seals between the housing 22 and the rotating shaft 28 is usually Since it is used as a flexible rubber or teflon, it is relatively vulnerable to high temperature heat, so when used in a high temperature operating environment, the seal may be damaged and the fluid leakage prevention effect may be reduced. there was.

이에 본 발명은 상기와 같은 문제점들을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 플랩 밸브의 몸체와 샤프트 사이의 틈새 공간을 밀폐하는 실링부재를 고온의 열에 강한 카본(carbon) 재질로 구성함으로써, 고온의 작동환경에서도 실링부재의 파손 없이 안정적인 유체 누출방지 효과를 얻을 수 있는 자동차 EGR용 플랩 밸브를 제공함에 있다.Accordingly, the present invention has been made to solve the above problems, an object of the present invention by configuring a sealing member for sealing the gap space between the body and the shaft of the flap valve by a carbon material resistant to high temperature heat, The present invention provides a flap valve for automobile EGR that can obtain a stable fluid leakage preventing effect without breaking the sealing member even in a high temperature operating environment.

상기한 목적을 달성하기 위한 본 발명의 자동차 EGR용 플랩 밸브는, 유체가 흐르는 유로와 샤프트의 설치를 위한 설치공이 형성된 밸브 몸체; 상기 설치공을 통해 삽입된 샤프트와 체결되고 상기 샤프트의 회전시 연동하여 회전되면서 상기 유로를 개폐하는 밸브판; 상기 샤프트의 외주에 결합되며 상기 샤프트와 상기 설치공 사이의 틈새 공간을 폐쇄하여 유체가 외부로 누출되지 않도록 밀폐하는 실링부재를 포함하여 이루어지되, 상기 샤프트의 외주에는 환형 턱이 형성되고, 상기 실링부재는 카본(carbon) 재질로 이루어져 상기 환형 턱의 내,외측에 각각 설치되는 것을 특징으로 한다.The flap valve for automobile EGR of the present invention for achieving the above object, the valve body is formed with a mounting hole for the installation of the flow path and the shaft flows; A valve plate that is coupled to the shaft inserted through the installation hole and opens and closes the flow path while rotating in association with the shaft; It is coupled to the outer circumference of the shaft and comprises a sealing member for closing the gap space between the shaft and the installation hole to prevent the fluid from leaking to the outside, the outer circumference of the shaft is formed with an annular jaw, the sealing The member is made of carbon material, characterized in that it is installed on the inside, the outside of the annular jaw, respectively.

여기서, 본 발명에는 상기 설치공의 최외곽을 폐쇄하는 캡; 및 상기 캡과 실링부재 사이에 지지되며 상기 실링부재를 가압하는 스프링이 더 설치될 수 있다.Here, the present invention caps for closing the outermost of the installation hole; And a spring supported between the cap and the sealing member to pressurize the sealing member.

또한, 상기 실링부재의 내측면과 접촉되는 상기 샤프트의 외주면에는 원주홈이 형성될 수 있다.In addition, a circumferential groove may be formed on an outer circumferential surface of the shaft in contact with the inner surface of the sealing member.

한편, 본 발명에는 상기 설치공의 최외곽을 폐쇄하는 동시에 상기 실링부재를 탄성 가압하는 탄성캡이 설치될 수 있다.On the other hand, the present invention may be provided with an elastic cap for closing the outermost of the installation hole and at the same time elastically pressing the sealing member.

그리고, 상기 실링부재의 내측면에는 암나사부가 형성되고 상기 샤프트의 외주면에는 상기 실링부재의 암나사부와 맞물리는 숫나사부가 형성될 수 있다.In addition, a female screw portion may be formed on an inner surface of the sealing member, and a male screw portion may be formed on an outer circumferential surface of the shaft to engage with a female screw portion of the sealing member.

또는, 상기 샤프트의 환형 턱과 접촉되는 상기 실링부재의 접촉면 상에는 환형 돌기가 형성될 수 있다.Alternatively, an annular protrusion may be formed on a contact surface of the sealing member that is in contact with the annular jaw of the shaft.

상기와 같은 구성을 갖는 본 발명은 플랩 밸브의 몸체와 샤프트 사이의 틈새 공간을 밀폐해 주는 실링부재를 카본(carbon) 재질로 구성함으로써, 고무나 테프론(teflon) 재질로 이루어졌었던 기존의 실링부재와 달리 고온의 환경에서도 실링부재의 파손 없이 안정적으로 유체 누출방지 효과를 얻을 수 있다.According to the present invention having the configuration as described above, the sealing member that seals the gap space between the body and the shaft of the flap valve is made of carbon, and the existing sealing member made of rubber or teflon material. Unlike in a high temperature environment, it is possible to stably obtain a fluid leakage preventing effect without damaging the sealing member.

아울러, 몸체의 설치공 최외곽에 캡을 설치하고 상기 캡과 실링부재 사이에 스프링을 설치하여 상기 실링부재가 스프링을 통해 눌려 가압되도록 구성함으로써, 실링부재가 마모되어 치수가 변하더라도 실링부재가 스프링을 통해 가압되어 샤프트와 항상 면접촉되기 때문에 실링부재와 샤프트 사이의 틈새 공간으로 유체가 누출되는 것을 방지할 수 있다.In addition, by installing a cap on the outermost of the installation hole of the body and by installing a spring between the cap and the sealing member to configure the sealing member to be pressed and pressed through the spring, even if the sealing member is worn and the dimensions change, the sealing member is spring Since it is pressurized through and always in surface contact with the shaft, it is possible to prevent the fluid from leaking into the gap space between the sealing member and the shaft.

이하, 첨부도면에 의거하여 본 발명의 바람직한 실시 예를 상세히 설명하기 로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 일실시 예에 따른 자동차 EGR용 플랩 밸브의 구조를 도시한 단면도이다.2 is a cross-sectional view showing the structure of a flap valve for a vehicle EGR according to an embodiment of the present invention.

도 2에 도시한 바와 같이, 본 발명의 자동차 EGR용 플랩 밸브는, 밸브의 몸체(100) 중앙에 유체(가스)가 흐르는 유로(102)가 형성되고, 상기 유로(102)의 상,하부에서 몸체(100)를 수직으로 관통하여 설치공(104)이 형성된다.As shown in FIG. 2, in the flap valve for automobile EGR of the present invention, a flow path 102 through which a fluid (gas) flows is formed in the center of the body 100 of the valve, and the upper and lower portions of the flow path 102 are formed. The installation hole 104 is formed by vertically penetrating the body 100.

상기 상,하부 설치공(104) 내부에는 외부의 회전수단(미도시)과 연결된 샤프트(110)가 삽입되고, 상기 삽입된 각 샤프트(110)의 끝단은 유로(102) 내에 배치된 원판 형태의 밸브판(200)과 결합되어, 외부 회전수단에 의해 샤프트(110)의 회전이 이루어지면 이와 연동하여 밸브판(200)이 회전되면서 유로(102)를 개폐하도록 되어 있다.Inside the upper and lower installation holes 104, a shaft 110 connected to an external rotating means (not shown) is inserted, and ends of the inserted shafts 110 are formed in a disk shape disposed in the flow path 102. Coupled with the valve plate 200, when the shaft 110 is rotated by an external rotating means, the valve plate 200 is rotated in association with the valve plate 200 to open and close the flow path 102.

상기 샤프트(110)의 외주에는 몸체(100)와 샤프트(110) 사이의 틈새 공간을 폐쇄하는 실링부재(140)(141) 안착될 수 있도록 환형 턱(110a)이 형성되어 있다.The outer periphery of the shaft 110 has an annular jaw (110a) is formed so that the sealing member 140, 141 for closing the gap space between the body 100 and the shaft 110 can be seated.

상기 실링부재(140)(141)는 고온의 열에 의해 쉽게 파손되지 않도록 열에 강한 카본(carbon) 재질로 구성되는바, 이러한 실링부재(140)(141)는 환형 턱(110a)을 중심으로 샤프트(110)의 내측(유로에 가까워지는 방향)과 외측(유로로부터 멀어지는 방향)에 각각 끼워져 결합된다.The sealing members 140 and 141 are formed of a carbon material resistant to heat so as not to be easily damaged by high temperature heat, and the sealing members 140 and 141 may have a shaft around the annular jaw 110a. It is fitted to the inner side (direction closer to the flow path) and the outer side (direction away from the flow path) of 110, respectively.

이때, 상기 실링부재(140)(141)는 샤프트(110)의 외주면 및 환형 턱(110a)의 내,외측면과 서로 면접촉 상태를 유지하게 된다.In this case, the sealing members 140 and 141 maintain surface contact with the outer circumferential surface of the shaft 110 and the inner and outer surfaces of the annular jaw 110a.

아울러, 상기 실링부재(140)(141)는 샤프트(110)와 몸체(100) 사이의 틈새 공간을 폐쇄하여 유체가 외부로 누출되지 않도록 밀폐하게 된다.In addition, the sealing members 140 and 141 are closed to close the gap space between the shaft 110 and the body 100 so that the fluid does not leak to the outside.

그리고, 상기 설치공(104)의 최외곽에는 캡(120)이 결합되는데, 상기 캡(120)은 샤프트(110)의 외주부를 둘러싸며 설치공(104)을 폐쇄한다.In addition, a cap 120 is coupled to the outermost part of the installation hole 104, and the cap 120 surrounds the outer circumference of the shaft 110 to close the installation hole 104.

또한, 상기 캡(120)과 외측 실링부재(141) 사이에는 스프링(130)이 설치된다. In addition, a spring 130 is installed between the cap 120 and the outer sealing member 141.

상기 스프링(130)은 외측 실링부재(141)를 몸체(100)의 내측방향으로 눌러 가압하게 된다. The spring 130 is pressed by the outer sealing member 141 in the inward direction of the body 100.

이에 따라, 내,외측 실링부재(140)(141)는 상기 스프링(130)의 탄성에 의해 샤프트(110)의 환형 턱(110a)에 항상 맞닿은 상태로 유지되어 실링부재(140)(141)와 환형 턱(110a) 사이의 틈새 공간으로 유체가 누출되지 않는다.Accordingly, the inner and outer sealing members 140 and 141 are always kept in contact with the annular jaw 110a of the shaft 110 by the elasticity of the spring 130 and thus the sealing members 140 and 141. Fluid does not leak into the gap space between the annular jaws 110a.

상기한 구성을 갖는 본 발명은 플랩 밸브의 몸체(100)와 샤프트(110) 사이의 틈새 공간을 밀폐해 주는 실링부재(140)(141)를 고열에 강한 카본(carbon) 재질로 구성함으로써, 고무나 테프론(teflon) 재질로 구성되던 기존의 실링부재와 달리 고온의 작동환경에서도 파손 없이 원활하게 작동될 수 있다.According to the present invention having the above-described configuration, the sealing members 140 and 141 which seal the gap space between the body 100 and the shaft 110 of the flap valve are made of a carbon material resistant to high heat, thereby providing rubber. Unlike the existing sealing member that was made of teflon (teflon) material can be operated smoothly without damage even in high temperature operating environment.

아울러, 몸체(100)의 설치공(104) 최외곽에 캡(120)을 설치하고 상기 캡(120)과 실링부재(141) 사이에 스프링(130)을 설치하여 상기 스프링(130)의 탄성에 의해 실링부재(140)(141)가 계속적으로 눌려 가압되도록 구성함으로써, 실링부재(140)(141)가 마모되어 치수가 변하더라도 상기 실링부재(140)(141)와 샤프트(110)의 환형 턱(110a)이 항상 면접촉 상태로 유지되기 때문에 실링부재(140)(141)와 환형 턱(110a) 사이의 틈새 공간으로 유체가 누출되는 것을 방지할 수 있다.In addition, the cap 120 is installed at the outermost part of the installation hole 104 of the body 100, and a spring 130 is installed between the cap 120 and the sealing member 141 to resilient the spring 130. The sealing members 140 and 141 are configured to be continuously pressed and pressurized, so that the sealing members 140 and 141 are worn and the annular jaws of the sealing members 140 and 141 and the shaft 110 are changed. Since the 110a is always maintained in the surface contact state, the fluid may be prevented from leaking into the gap space between the sealing members 140 and 141 and the annular jaw 110a.

한편, 도 3 내지 도 6은 본 발명의 다른 실시 예에 따른 플랩 밸브 구조를 도시한 것이다.On the other hand, Figures 3 to 6 show a flap valve structure according to another embodiment of the present invention.

도 3에서 보는 바와 같이 본 발명의 다른 실시 예에 의한 플랩 밸브 구조는 내,외측 실링부재(140)(141)의 내측면과 접촉되는 샤프트(110)의 외주면상에 원주홈(111)을 형성하여 샤프트(110)의 회전 작동시 실링부재(140)(141)와 샤프트(110) 사이로 유체가 누출되는 것을 효과적으로 방지할 수 있도록 구성할 수 있다.As shown in FIG. 3, the flap valve structure according to another embodiment of the present invention forms a circumferential groove 111 on the outer circumferential surface of the shaft 110 in contact with the inner surface of the inner and outer sealing members 140 and 141. In order to effectively prevent the leakage of the fluid between the sealing member 140, 141 and the shaft 110 during the rotation operation of the shaft 110.

또한, 도 4에 도시한 바와 같이, 설치공(104)을 폐쇄하는 캡(130a)의 형상을 탄성 변형이 가능한 굴곡진 형태로 형성함으로써, 캡(130a)과 실링부재(141) 사이에 별도의 스프링을 장착하지 않고서도 캡(130a) 자체가 가지는 탄성에 의해 실링부재(141)를 눌러 가압하도록 구성할 수 있다.In addition, as shown in Figure 4, by forming the shape of the cap 130a for closing the installation hole 104 in a curved form capable of elastic deformation, a separate between the cap 130a and the sealing member 141 It can be configured to press the sealing member 141 by the elasticity of the cap 130a itself without mounting the spring.

또한, 도 5에 도시한 바와 같이, 실링부재(140)(141)의 내측면에 암나사부(142)를 형성하고 이들 실링부재와 접촉되는 샤프트(110)의 외주면에 숫나사부(112)를 형성하여 상기 암나사부(142)와 숫나사부(112)가 서로 맞물리도록 형성함으로써, 샤프트(110)의 회동 작동시 실링부재(140)(141)와 샤프트(110) 사이의 유체 누출을 최소화할 수 있다.In addition, as shown in FIG. 5, the female threaded portion 142 is formed on the inner surface of the sealing members 140 and 141, and the male threaded portion 112 is formed on the outer circumferential surface of the shaft 110 in contact with the sealing members. By forming the female screw portion 142 and the male screw portion 112 to be engaged with each other, it is possible to minimize the fluid leakage between the sealing member 140, 141 and the shaft 110 during the rotation operation of the shaft 110. .

이 밖에, 도 6에 도시한 바와 같이, 샤프트(110)의 환형 턱(110a)과 접촉되는 실링부재(140)(141)의 접촉면상에 환형 돌기(144)를 형성함으로써, 상기 환형 턱(110a)과 실링부재(140)(141) 간의 접촉면적을 최소화하여 밀폐력(sealing force)을 극대화시킬 수 있다.In addition, as shown in Figure 6, by forming the annular projection 144 on the contact surface of the sealing member 140, 141 in contact with the annular jaw (110a) of the shaft 110, the annular jaw (110a) ) And the sealing members 140 and 141 may be minimized to maximize the sealing force.

도 1은 종래의 자동차 EGR용 버터플라이 밸브를 도시한 단면도.1 is a cross-sectional view showing a butterfly valve for a conventional vehicle EGR.

도 2는 본 발명의 일실시 예에 따른 자동차 EGR용 플랩 밸브의 구조를 도시한 단면도.2 is a cross-sectional view showing the structure of a flap valve for a vehicle EGR according to an embodiment of the present invention.

도 3 내지 도 6은 본 발명의 다른 실시 예에 따른 플랩 밸브 구조를 도시한 단면도.3 to 6 are cross-sectional views showing a flap valve structure according to another embodiment of the present invention.

*** 도면의 주요 부분에 사용된 부호의 설명 ****** Explanation of symbols used in the main part of the drawing ***

100 : 몸체 102 : 유로100: body 102: euro

104 : 설치공 110 : 샤프트104: installation hole 110: shaft

110a : 환형 턱 111 : 원주홈110a: annular jaw 111: circumferential groove

112 : 숫나사부 120,130a : 캡112: male part 120,130a: cap

130 : 스프링 140,141 : 실링부재130: spring 140,141: sealing member

142 : 암나사부 144 : 환형 돌기142: female thread 144: annular projection

200 : 밸브판200: valve plate

Claims (6)

유체가 흐르는 유로와 샤프트의 설치를 위한 설치공이 형성된 밸브 몸체;A valve body having an installation hole for installing a flow path and a shaft through which the fluid flows; 상기 설치공을 통해 삽입된 샤프트와 체결되고 상기 샤프트의 회전시 연동하여 회전되면서 상기 유로를 개폐하는 밸브판;A valve plate that is coupled to the shaft inserted through the installation hole and opens and closes the flow path while rotating in association with the shaft; 상기 샤프트의 외주에 결합되며 상기 샤프트와 상기 설치공 사이의 틈새 공간을 폐쇄하여 유체가 외부로 누출되지 않도록 밀폐하는 실링부재를 포함하여 이루어지되,It is coupled to the outer periphery of the shaft is made to include a sealing member for closing the gap space between the shaft and the installation hole to prevent the fluid from leaking to the outside, 상기 샤프트의 외주에는 환형 턱이 형성되고, 상기 실링부재는 카본(carbon) 재질로 이루어져 상기 환형 턱의 내,외측에 각각 설치되는 것을 특징으로 하는 자동차 EGR용 플랩 밸브.An annular jaw is formed on the outer circumference of the shaft, and the sealing member is made of carbon material and is installed inside and outside of the annular jaw, respectively. 제1항에 있어서, The method of claim 1, 상기 설치공의 최외곽을 폐쇄하는 캡; 및A cap for closing the outermost portion of the installation hole; And 상기 캡과 실링부재 사이에 지지되며 상기 실링부재를 가압하는 스프링;A spring supported between the cap and the sealing member to pressurize the sealing member; 이 더 설치된 것을 특징으로 하는 자동차 EGR용 플랩 밸브.The flap valve for automobile EGR further characterized by this installation. 제1항에 있어서, 상기 실링부재의 내측면과 접촉되는 상기 샤프트의 외주면 에는 원주홈이 형성된 것을 특징으로 하는 자동차 EGR용 플랩 밸브.The flap valve for automobile EGR according to claim 1, wherein a circumferential groove is formed on an outer circumferential surface of the shaft in contact with the inner surface of the sealing member. 제1항에 있어서, 상기 설치공의 최외곽을 폐쇄하는 동시에 상기 실링부재를 탄성 가압하는 탄성캡이 설치된 것을 특징으로 하는 자동차 EGR용 플랩 밸브.The flap valve for automobile EGR according to claim 1, wherein an elastic cap for closing the outermost part of the installation hole and elastically pressing the sealing member is installed. 제1항에 있어서, 상기 실링부재의 내측면에는 암나사부가 형성되고 상기 샤프트의 외주면에는 상기 실링부재의 암나사부와 맞물리는 숫나사부가 형성된 것을 특징으로 하는 자동차 EGR용 플랩 밸브.The flap valve for an automobile EGR according to claim 1, wherein a female screw portion is formed on an inner surface of the sealing member, and a male screw portion is formed on an outer circumferential surface of the shaft to engage with a female screw portion of the sealing member. 제1항에 있어서, 상기 샤프트의 환형 턱과 접촉되는 상기 실링부재의 접촉면 상에는 환형 돌기가 형성된 것을 특징으로 하는 자동차 EGR용 플랩 밸브.The flap valve for an automobile EGR according to claim 1, wherein an annular protrusion is formed on a contact surface of the sealing member in contact with the annular jaw of the shaft.
KR1020090098351A 2009-10-15 2009-10-15 Flap valve for egr of a vehicle KR20110041263A (en)

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