JP2013019513A - Valve device - Google Patents

Valve device Download PDF

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JP2013019513A
JP2013019513A JP2011155074A JP2011155074A JP2013019513A JP 2013019513 A JP2013019513 A JP 2013019513A JP 2011155074 A JP2011155074 A JP 2011155074A JP 2011155074 A JP2011155074 A JP 2011155074A JP 2013019513 A JP2013019513 A JP 2013019513A
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valve body
cross
housing
contact portion
center
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JP5747704B2 (en
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Kenji Muraoka
健二 村岡
Shinichi Tsubata
真一 鍔田
Motoaki Mori
基彰 森
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Taiho Kogyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a high-airtight valve device 6 despite of its simple structure.SOLUTION: In the valve device 6, an exhaust path 16 is formed of a tapered shape 16a in cross-section whose inner circumferential surface reduces along its given axial direction, and a center C2 of a valve body 14 and a rotational center C3 of a rotary shaft 13 are separated, while the rotational center C3 of the rotary shaft 13 is provided so as to intersect with a central axis 4C of the valve body. The valve body 14 includes an abutting portion 14a whose outer periphery is thin and is formed into a perfect circle. When the valve body 14 is allowed to make the transition to a closed state where a fluid passage is closed, the central axis 4C of the valve body 14 tilts at a given angle in relation to an axial direction C1 of the tapered shape 16a in cross-section, and thereby an entire circumference of the abutting portion 14a comes to contact with the tapered shape 16a in cross-section of a housing 12. On this occasion, when cutting the tapered shape 16a in cross-section of the housing 12 at a tilt angle of the valve body 14 at a position passing through the center C2 of the valve body 14, the cross-sectional shape created by the cutting exhibits a perfect circle.

Description

本発明は弁装置に関し、内部に流体通路の形成されたハウジングと、該ハウジングに形成された軸受部に回転可能に軸支された回転軸と、該回転軸に固定されて上記流体通路を開閉する円盤状の弁体とを備えた弁装置に関する。   The present invention relates to a valve device, a housing having a fluid passage formed therein, a rotating shaft rotatably supported by a bearing portion formed in the housing, and opening and closing the fluid passage fixed to the rotating shaft. The present invention relates to a valve device including a disc-shaped valve body.

従来、内部に流体が流通する流体通路の形成されたハウジングと、該ハウジングに形成された軸受部に回転可能に軸支された回転軸と、該回転軸に固定されて上記流体通路を開閉する円盤状の弁体とを備えた弁装置が知られている。
このような弁装置として、上記回転軸の回転中心と弁体の中心とが一致している弁装置（特許文献１）が知られているが、このような特許文献１の弁装置の場合、弁体が閉鎖状態となった場合に、流体が上記ハウジングの軸受部から漏れてしまうという問題があった。
このような弁装置に対して、上記流体通路の内周面を所定の軸方向に沿って縮小する断面テーパ形状とし、さらに弁体と当該断面テーパ形状とが接触するシール線に対し、上記回転軸の回転中心を離隔させた弁装置が知られている（特許文献２）。
このような構成とすることで、上記弁体を上記回転軸よりも上流側に位置させることができ、流体がハウジングの軸受部から漏れてしまうという問題を解決することができる。 Conventionally, a housing in which a fluid passage through which fluid flows is formed, a rotating shaft rotatably supported by a bearing portion formed in the housing, and the fluid passage fixed to the rotating shaft to open and close the fluid passage 2. Description of the Related Art A valve device including a disc-shaped valve body is known.
As such a valve device, there is known a valve device (Patent Document 1) in which the rotation center of the rotating shaft and the center of the valve body coincide with each other. In the case of such a valve device of Patent Document 1, When the valve body is in a closed state, there is a problem that fluid leaks from the bearing portion of the housing.
For such a valve device, the inner circumferential surface of the fluid passage has a tapered cross-section that reduces along the predetermined axial direction, and further, the rotation of the seal against the seal line that contacts the valve element and the tapered cross-section. A valve device in which the rotation center of a shaft is separated is known (Patent Document 2).
By setting it as such a structure, the said valve body can be located upstream from the said rotating shaft, and the problem that a fluid leaks from the bearing part of a housing can be solved.

特開２００４−２６３７２３号公報JP 2004-263723 A 実開昭６２―４６８６３号公報Japanese Utility Model Publication No. 62-46863

上記特許文献２には、従来例として上記流体通路の断面テーパ形状の中心軸上に回転軸の回転中心を位置させた構成（図６）と、断面テーパ形状の中心軸から回転軸の回転中心を偏心させた構成（図１３）とが開示されている。
しかしながら図６の構成のように流体通路の断面テーパ形状の中心軸上に回転軸の回転中心を位置させた場合、弁体を回転させて閉鎖状態と開放状態とするには上記弁体の外周に設けた樹脂製のシール部材を大きく変形させる必要があった。
一方、図１３の構成の場合、閉鎖状態とした際に上記回転軸の回転中心を挟んで上記弁体における面積の広い側に圧力が高く作用するため、弁体を開閉操作するためには上記回転軸を高いトルクで回転させなければならないという問題があった。
このような問題に鑑み、本発明は簡易な構成ながら気密性の高い弁装置を提供するものである。 In the above-mentioned Patent Document 2, as a conventional example, a configuration (FIG. 6) in which the rotation center of the rotary shaft is positioned on the central axis of the cross-section tapered shape of the fluid passage, and the rotation center of the rotary shaft from the central axis of the cross-section tapered shape And an eccentric configuration (FIG. 13).
However, when the center of rotation of the rotary shaft is positioned on the center axis of the tapered section of the fluid passage as in the configuration of FIG. 6, the outer periphery of the valve body is required to rotate the valve body to the closed state and the open state. It was necessary to greatly deform the resin-made seal member provided on the surface.
On the other hand, in the case of the configuration of FIG. 13, when the valve body is in the closed state, the pressure acts on the wide side of the valve body across the rotation center of the rotary shaft. There was a problem that the rotating shaft had to be rotated with high torque.
In view of such a problem, the present invention provides a highly airtight valve device with a simple configuration.

すなわち請求項１の発明にかかる弁装置は、内部に流体が流通する流体通路の形成されたハウジングと、該ハウジングに形成された軸受部に回転可能に軸支された回転軸と、該回転軸に固定されて上記流体通路を開閉する円盤状の弁体とを備え、
上記流体通路は所定の軸方向に沿って内周面が縮小する断面テーパ形状を有し、また上記弁体の中心と上記回転軸の回転中心とが離隔している弁装置において、
上記弁体はその外周が薄肉状で真円に形成された当接部を備え、
上記回転軸の回転中心を、上記当接部が形成する平面に直交するとともに当接部の中心を通過する弁体中心軸と交差するように設け、
上記弁体を上記流体通路を閉鎖した閉鎖状態とすると、上記弁体の弁体中心軸が上記断面テーパ形状の軸方向に対して所定の角度で傾斜して、上記当接部の全周が上記ハウジングの断面テーパ形状に接触し、
その際上記ハウジングの断面テーパ形状を、弁体の中心を通過する位置で該弁体の傾斜角度と平行に切断すると、その断面形状が真円となり、弁体の中心を通過する位置で断面テーパ形状の軸方向に直交する角度で切断すると、その断面形状が真円とはならず、
そして弁体を開放状態とする際には、上記弁体の弁体中心軸と上記断面テーパ形状の軸方向との角度を、上記閉鎖状態における傾斜角度よりも大きく傾斜させるように上記回転軸を回転させることを特徴としている。 That is, the valve device according to the invention of claim 1 includes a housing in which a fluid passage through which a fluid flows is formed, a rotating shaft rotatably supported on a bearing portion formed in the housing, and the rotating shaft. A disc-shaped valve body that is fixed to and opens and closes the fluid passage,
In the valve device, the fluid passage has a tapered cross-sectional shape in which an inner peripheral surface is reduced along a predetermined axial direction, and the center of the valve body and the rotation center of the rotating shaft are separated from each other.
The valve body includes a contact portion formed in a perfect circle with a thin outer periphery,
The rotation center of the rotation shaft is provided so as to intersect with the central axis of the valve body that is orthogonal to the plane formed by the contact portion and passes through the center of the contact portion,
When the valve body is in a closed state in which the fluid passage is closed, the valve body central axis of the valve body is inclined at a predetermined angle with respect to the axial direction of the tapered section, and the entire circumference of the contact portion is In contact with the tapered cross-section of the housing,
At that time, if the tapered cross section of the housing is cut parallel to the inclination angle of the valve body at a position passing through the center of the valve body, the cross sectional shape becomes a perfect circle, and the cross sectional taper is formed at a position passing through the center of the valve body. When cut at an angle perpendicular to the axial direction of the shape, the cross-sectional shape does not become a perfect circle,
When the valve body is in the open state, the rotation shaft is set so that the angle between the valve body central axis of the valve body and the axial direction of the tapered section is larger than the inclination angle in the closed state. It is characterized by rotating.

上記発明によれば、弁体の当接部を真円としており、さらに弁体を閉鎖状態とした際に、該弁体の当接部が形成する平面で切断した断面テーパ形状の断面形状が真円となるため、弁体と断面テーパ形状とが線接触し、高い気密性を得ることが可能であるとともに、弾性変形するシール部材を不要とすることができる。
また、上記回転軸の回転中心は弁体の弁体中心軸と交差するように設けられていることから、閉鎖状態とした際に弁体には回転軸を挟んで均等に圧力が作用するようにすることができる。 According to the above invention, the contact portion of the valve body is a perfect circle, and when the valve body is in a closed state, the cross-sectional shape of the tapered section cut by the plane formed by the contact portion of the valve body is Since it becomes a perfect circle, the valve body and the taper shape of the cross section are in line contact with each other, so that high airtightness can be obtained and an elastically deformable seal member can be eliminated.
Further, since the rotation center of the rotary shaft is provided so as to intersect the valve body central axis of the valve body, when the valve body is closed, the pressure is applied to the valve body evenly across the rotation shaft. Can be.

本実施例にかかる弁装置を備えたエンジンの構成図The block diagram of the engine provided with the valve apparatus concerning a present Example 弁装置の構成を示す側面図Side view showing the configuration of the valve device 弁装置の断面テーパ形状、弁体、回転軸の配置を示す断面図Sectional drawing which shows arrangement of taper cross section of valve device, valve body, and rotation shaft 弁体の接触部の移動軌跡を説明する図The figure explaining the movement locus of the contact part of a valve element

以下図示実施例について説明すると、図１は自動車エンジンの構成図を示しており、ディーゼルエンジンなどのエンジン１と、該エンジン１から排出される流体としての排気ガスを流通させる排気管２と、該排気管２の管路上に直列的に設けられた第１、第２ターボ３、４とを備え、上記排気管２には上記第１ターボ３を迂回するバイパス通路５が接続され、このバイパス通路５に本発明にかかる弁装置６が設けられている。
上記第１ターボ３はエンジン１の運転状況に応じて作動状態を切替えることが可能となっており、具体的には、第１ターボ３を作動させる際には上記弁装置６がバイパス通路５を閉鎖し、第１ターボ３を非作動とする際には上記弁装置６を開放して排気ガスをバイパス通路５から第２ターボ４に供給するようになっている。 FIG. 1 shows a configuration diagram of an automobile engine. FIG. 1 shows an engine 1 such as a diesel engine, an exhaust pipe 2 through which exhaust gas as fluid discharged from the engine 1 circulates, The exhaust pipe 2 includes first and second turbos 3 and 4 that are provided in series on the pipe line of the exhaust pipe 2, and a bypass passage 5 that bypasses the first turbo 3 is connected to the exhaust pipe 2. 5, a valve device 6 according to the present invention is provided.
The operating state of the first turbo 3 can be switched according to the operating state of the engine 1. Specifically, when the first turbo 3 is operated, the valve device 6 opens the bypass passage 5. When the first turbo 3 is closed and the first turbo 3 is deactivated, the valve device 6 is opened and exhaust gas is supplied from the bypass passage 5 to the second turbo 4.

図２は上記弁装置６の構成図を示しており、内部に排気ガスを流通させる排気通路１１の形成されたハウジング１２と、該ハウジング１２に形成された図示しない軸受部に回転可能に軸支された回転軸１３と、該回転軸１３に固定されて上記排気通路１１を開閉する円盤状の弁体１４と、上記回転軸１３を駆動する駆動手段１５とを備えている。
上記ハウジング１２は上記バイパス通路５の途中に挿入され、内部には金属製のリング状部材１６が固定され、該リング状部材１６の内周面は上記排気通路１１を形成する断面テーパ形状１６ａに加工されている。
上記ハウジング１２および上記リング状部材１６には図示左右方向に上記軸受部が穿設されており、上記回転軸１３はこの軸受部に図示しないシール手段を介して回転可能に軸支され、また回転軸１３の一端は上記ハウジング１２の外部に突出し、上記駆動手段１５に連結されている。
また上記回転軸１３には円盤状の上記弁体１４が固定されており、後に詳述するように弁体１４を閉鎖状態とした際にはこの弁体１４の外周と上記リング状部材１６の断面テーパ形状１６ａとが線接触して、排気通路１１を閉鎖するようになっている。
上記駆動手段１５は、ハウジング１２の上部に固定されたサーボモータ１７と、該サーボモータ１７によって回転するアーム１８と、該アーム１８と上記回転軸１３との間に設けられたリンク１９とから構成されている。
上記構成により、上記サーボモータ１７が回転軸１３を回転させることにより、該回転軸１３に固定された弁体１４を閉鎖状態と開放状態とに切替えるようになっている。 FIG. 2 is a block diagram of the valve device 6. The valve device 6 is rotatably supported by a housing 12 having an exhaust passage 11 through which exhaust gas flows and a bearing portion (not shown) formed in the housing 12. A rotary shaft 13, a disc-like valve body 14 that is fixed to the rotary shaft 13 and opens and closes the exhaust passage 11, and a driving means 15 that drives the rotary shaft 13.
The housing 12 is inserted in the middle of the bypass passage 5, and a metal ring-shaped member 16 is fixed inside, and the inner peripheral surface of the ring-shaped member 16 has a tapered cross section 16 a that forms the exhaust passage 11. Has been processed.
The housing 12 and the ring-shaped member 16 are provided with the bearing portion in the left-right direction in the drawing, and the rotary shaft 13 is rotatably supported by the bearing portion via a sealing means (not shown) and rotates. One end of the shaft 13 protrudes outside the housing 12 and is connected to the driving means 15.
Further, the disc-shaped valve body 14 is fixed to the rotary shaft 13, and when the valve body 14 is closed as will be described in detail later, the outer periphery of the valve body 14 and the ring-shaped member 16 The exhaust passage 11 is closed by making line contact with the tapered section 16a.
The driving means 15 includes a servo motor 17 fixed to the upper portion of the housing 12, an arm 18 rotated by the servo motor 17, and a link 19 provided between the arm 18 and the rotating shaft 13. Has been.
With the configuration described above, the servo motor 17 rotates the rotary shaft 13 so that the valve body 14 fixed to the rotary shaft 13 is switched between a closed state and an open state.

次に、図３を用いて上記排気通路１１を構成するリング状部材１６の内周面に形成された排気通路１１を形成する断面テーパ形状１６ａと、上記回転軸１３および弁体１４について詳細に説明する。なお図３は弁体１４が排気通路１１を閉鎖した閉鎖状態を示し、排気ガスは図示左方から右方に流通するようになっている。
まず上記リング状部材１６は金属によって成形されており、その内周面に形成された断面テーパ形状１６ａは、図示水平方向に設定した該断面テーパ形状１６ａの軸方向Ｃ１に沿って、排気ガスの流通方向の下流側から上流側に向けて縮小するように加工されている。なお、この断面テーパ形状１６ａの各位置での断面形状については後に詳述する。
次に、上記回転軸１３は弁体１４の一方の面に固定されて、上記弁体１４の中心Ｃ２と上記回転軸１３の回転中心Ｃ３とが離隔するようになっており、回転軸１３は上記閉鎖状態とされた弁体１４に対して排気ガスの下流側に位置するようになっている。
なお、上記回転軸１３については、弁体１４に対して排気ガスの上流側に設けても良いが、回転軸１３と上記軸受部とのシール性能確保の観点からは、排気ガスの下流側に設けることが望ましい。
そして上記弁体１４は、金属によって一体成形されており、その外周部分には薄肉状の当接部１４ａが形成されるとともに、この当接部１４ａは真円に形成されている。
ここで本実施例では、上記弁体の中心Ｃ２と上記当接部１４ａの中心とが一致しており、さらに上記当接部１４ａが形成する平面に直交し、かつ該弁体１４の中心Ｃ２を通過する軸を弁体中心軸Ｃ４と呼ぶ。
また上記弁体１４と回転軸１３との位置関係についてより詳細に説明すると、上記回転軸１３の回転中心Ｃ３はこの弁体中心軸Ｃ４と交差するようになっており、換言すると上記回転軸１３は弁体１４の中央に設けられている。
なお、上記回転軸１３の回転中心Ｃ３は断面テーパ形状１６ａの中心近傍を通過することとなり、該中心と正確に一致する必要はない。 Next, with reference to FIG. 3, the cross-sectional taper shape 16 a that forms the exhaust passage 11 formed on the inner peripheral surface of the ring-shaped member 16 that constitutes the exhaust passage 11, the rotating shaft 13, and the valve body 14 will be described in detail. explain. 3 shows a closed state in which the valve body 14 closes the exhaust passage 11, and the exhaust gas flows from the left to the right in the drawing.
First, the ring-shaped member 16 is formed of metal, and the cross-sectional taper shape 16a formed on the inner peripheral surface of the ring-shaped member 16 extends along the axial direction C1 of the cross-sectional taper shape 16a set in the horizontal direction in the drawing. It is processed so as to shrink from the downstream side in the flow direction toward the upstream side. The cross-sectional shape at each position of the cross-sectional taper shape 16a will be described in detail later.
Next, the rotary shaft 13 is fixed to one surface of the valve body 14, and the center C2 of the valve body 14 and the rotational center C3 of the rotary shaft 13 are separated from each other. It is located on the downstream side of the exhaust gas with respect to the valve body 14 in the closed state.
The rotary shaft 13 may be provided on the upstream side of the exhaust gas with respect to the valve body 14, but from the viewpoint of ensuring the sealing performance between the rotary shaft 13 and the bearing portion, the rotary shaft 13 is provided on the downstream side of the exhaust gas. It is desirable to provide it.
The valve body 14 is integrally formed of metal, and a thin contact portion 14a is formed on the outer peripheral portion thereof. The contact portion 14a is formed in a perfect circle.
Here, in the present embodiment, the center C2 of the valve body and the center of the contact portion 14a coincide with each other, and are orthogonal to the plane formed by the contact portion 14a, and the center C2 of the valve body 14 The axis passing through is called the valve body central axis C4.
The positional relationship between the valve body 14 and the rotary shaft 13 will be described in more detail. The rotation center C3 of the rotary shaft 13 intersects with the valve body central axis C4. In other words, the rotary shaft 13 Is provided in the center of the valve body 14.
The rotation center C3 of the rotary shaft 13 passes through the vicinity of the center of the cross-sectional taper shape 16a, and does not need to coincide with the center accurately.

そして図３に示すように、弁体１４が閉鎖状態となると、上記弁体中心軸４Ｃは上記断面テーパ形状１６ａの軸方向Ｃ１に対して所定の角度で傾斜するようになっており、本実施例では回転軸１３が反時計方向に角度θだけ回転した状態で閉鎖状態となっている。
このように弁体１４が閉鎖状態となると、上記弁体１４の当接部１４ａの全周が上記流体通路１１を構成するリング状部材１６の断面テーパ形状１６ａに線接触して、排気通路１１を閉鎖するようになっている。
つまりこの閉鎖状態において、上記断面テーパ形状１６ａを上記当接部１４ａが形成する平面で切断、換言すると上記弁体１４の中心Ｃ２を通過する位置で上記弁体１４の傾斜角度θと平行に切断すると、その断面形状は上記弁体１４の当接部１４ａと同径の真円となる。
一方、上記断面テーパ形状１６ａを弁体１４の中心Ｃ２を通過する位置で断面テーパ形状１６ａの軸方向Ｃ１に直交する平面で切断すると、その断面形状が真円とはならず、略卵形の形状となる。
そして上記リング状部材１６の断面テーパ形状１６ａは、上記該断面テーパ形状１６ａを断面テーパ形状１６ａの軸方向Ｃ１に対して直交する方向で切断した、真円ではない形状をそれぞれ拡大、縮小させて形成したものとなっている。 As shown in FIG. 3, when the valve body 14 is closed, the valve body central shaft 4C is inclined at a predetermined angle with respect to the axial direction C1 of the tapered section 16a. In the example, the rotating shaft 13 is in a closed state in a state where it is rotated counterclockwise by an angle θ.
When the valve body 14 is in the closed state in this way, the entire circumference of the contact portion 14a of the valve body 14 comes into line contact with the tapered section 16a of the ring-shaped member 16 constituting the fluid passage 11, and the exhaust passage 11 Is supposed to be closed.
In other words, in this closed state, the tapered section 16a is cut along the plane formed by the contact portion 14a, in other words, cut parallel to the inclination angle θ of the valve body 14 at a position passing through the center C2 of the valve body 14. Then, the cross-sectional shape becomes a perfect circle having the same diameter as the contact portion 14 a of the valve body 14.
On the other hand, when the cross-sectional taper shape 16a is cut by a plane perpendicular to the axial direction C1 of the cross-section taper shape 16a at a position passing through the center C2 of the valve body 14, the cross-sectional shape does not become a perfect circle but is substantially oval. It becomes a shape.
Then, the cross-sectional taper shape 16a of the ring-shaped member 16 is obtained by enlarging and reducing the non-circular shape obtained by cutting the cross-sectional taper shape 16a in a direction perpendicular to the axial direction C1 of the cross-sectional taper shape 16a. It has been formed.

図４は上記リング状部材１６の断面テーパ形状１６ａと上記弁体１４の当接部１４ａとの拡大図を示し、上記弁体１４が閉鎖状態となった状態から、該弁体１４が開放状態となる際における上記当接部１４ａの軌跡を説明した図を示している。
上述したように、本実施例の回転軸１３は弁体１４の一方の面に固定され、弁体１４の中心Ｃ２と回転軸１３の回転中心Ｃ３とが離隔していることから、弁体１４の接触部は弁体１４の中心Ｃ２で回転せず、回転軸１３の回転中心Ｃ３を中心に回転することとなる。
このため弁体１４を閉鎖状態から開放状態とするには、弁体１４の弁体中心軸４Ｃと断面テーパ形状１６ａの軸方向Ｃ１との角度を、上記閉鎖状態における角度θよりも大きく傾斜させるように回転、換言すると図４における反時計方向に回転させる必要がある。
すると、図示上方および下方に示した当接部１４ａは断面テーパ形状１６ａより離脱してゆき、その後上記駆動手段１５によって弁体１４が所定の開度まで開放されることとなる。
逆に、上記閉鎖状態から弁体１４を上記閉鎖状態における角度θよりも小さい角度となるように回転、換言すると図４における時計方向に回転させようとしても、図示した当接部１４ａの軌跡から明らかなように、該当接部１４ａは断面テーパ形状１６ａに干渉することなり、弁体１４を回転させることができずに閉鎖状態が維持されることとなる。 FIG. 4 shows an enlarged view of the cross-section taper shape 16a of the ring-shaped member 16 and the contact portion 14a of the valve body 14, and the valve body 14 is opened from the closed state. The figure explaining the locus | trajectory of the said contact part 14a in becoming is shown.
As described above, the rotary shaft 13 of the present embodiment is fixed to one surface of the valve body 14, and the center C2 of the valve body 14 and the rotation center C3 of the rotary shaft 13 are separated from each other. The contact portion does not rotate at the center C2 of the valve body 14, but rotates around the rotation center C3 of the rotating shaft 13.
For this reason, in order to change the valve body 14 from the closed state to the open state, the angle between the valve body central axis 4C of the valve body 14 and the axial direction C1 of the tapered section 16a is inclined more than the angle θ in the closed state. Thus, in other words, it is necessary to rotate in the counterclockwise direction in FIG.
Then, the contact part 14a shown in the upper and lower parts in the drawing is separated from the tapered section 16a, and then the valve body 14 is opened to a predetermined opening degree by the driving means 15.
On the contrary, even if the valve body 14 is rotated from the closed state to an angle smaller than the angle θ in the closed state, in other words, the clockwise direction in FIG. As is apparent, the corresponding contact portion 14a interferes with the tapered cross section 16a, and the valve body 14 cannot be rotated and the closed state is maintained.

以上のように、本実施例の弁装置６は上記弁体１４の中心Ｃ２と上記回転軸１３の回転中心Ｃ３とが離隔し、かつ回転軸１３を弁体１４よりも排気ガスの流通方向下流側に設けている。
このため、弁体１４を閉鎖状態とした場合に、排気ガスは弁体１４によって流通が阻止されるため、排気ガスが上記回転軸１３と該回転軸１３を軸支するハウジング１２の軸受部との間から漏出しないようになっている。
さらに、上記弁体１４の当接部１４ａを薄肉状で真円として、閉鎖状態とした際に上記弁体１４の弁体中心軸４Ｃが上記断面テーパ形状１６ａの軸方向Ｃ１に対して所定の角度で傾斜し、弁体１４の当接部１４ａと断面テーパ形状１６ａとが線接触し、排気通路１１を高気密で閉鎖することが可能となる。
つまり閉鎖状態において、上記断面テーパ形状１６ａを、弁体１４の当接部１４ａが形成する平面で切断すると、その断面形状が上記当接部１４ａと同径の真円となる。
そして、上記回転軸１３の回転中心Ｃ３を、上記弁体１４の当接部１４ａの弁体中心軸４Ｃと交差するように設けたことにより、閉鎖状態となった弁体１４を上記回転軸１３を回転させることで、上記線接触している弁体１４を断面テーパ形状１６ａから離脱させることが可能となっている。
つまり本実施例における弁体１４には、特許文献２に開示される弁体１４に装着された弾性変形する樹脂製のシール部材は不要であり、該シール部材の変形による劣化という問題が発生しない。
さらには、弁体１４と上記断面テーパ形状１６ａの形成されたリング状部材１６とを金属によって形成することで、排気通路１１をメタルタッチにより閉鎖することが可能となっている。
そして上記弁体１４の当接部１４ａの弁体中心軸４Ｃと交差するように設けたことで、上記弁体１４における上記回転軸１３を挟んだ両側の領域に作用する圧力のバランスをつりあわせることができる。 As described above, in the valve device 6 of this embodiment, the center C2 of the valve body 14 and the rotation center C3 of the rotary shaft 13 are separated from each other, and the rotary shaft 13 is downstream of the valve body 14 in the exhaust gas flow direction. On the side.
For this reason, when the valve body 14 is in a closed state, the exhaust gas is prevented from flowing by the valve body 14, so that the exhaust gas has the rotating shaft 13 and the bearing portion of the housing 12 that supports the rotating shaft 13. It is designed not to leak from between.
Further, when the contact portion 14a of the valve body 14 is thin and has a perfect circle, the valve body central axis 4C of the valve body 14 is predetermined with respect to the axial direction C1 of the tapered section 16a. Inclined at an angle, the contact portion 14a of the valve body 14 and the tapered section 16a come into line contact, and the exhaust passage 11 can be closed with high airtightness.
That is, in the closed state, when the cross-sectional taper shape 16a is cut along a plane formed by the contact portion 14a of the valve body 14, the cross-sectional shape becomes a perfect circle having the same diameter as the contact portion 14a.
Then, the rotation center C3 of the rotary shaft 13 is provided so as to intersect the valve body central axis 4C of the contact portion 14a of the valve body 14, so that the valve body 14 in the closed state is placed on the rotary shaft 13. , The valve body 14 in line contact can be detached from the tapered cross-section 16a.
That is, the valve body 14 according to the present embodiment does not require an elastically deformable resin sealing member mounted on the valve body 14 disclosed in Patent Document 2, and does not cause a problem of deterioration due to deformation of the sealing member. .
Furthermore, the exhaust passage 11 can be closed by metal touch by forming the valve body 14 and the ring-shaped member 16 having the tapered section 16a formed of metal.
The valve body 14 is provided so as to intersect with the valve body central axis 4C of the contact portion 14a of the valve body 14, thereby balancing the pressure acting on the both sides of the valve body 14 with the rotary shaft 13 therebetween. be able to.

６ 弁装置 １１ 排気通路
１２ ハウジング １３ 回転軸
１４ 弁体 １４ａ 当接部
１６ａ 断面テーパ形状 Ｃ１ 断面テーパ形状の軸方向
Ｃ２ 弁体の中心 Ｃ３ 回転軸の回転中心
Ｃ４ 弁体中心軸 6 Valve device 11 Exhaust passage 12 Housing 13 Rotating shaft 14 Valve body 14a Contact portion 16a Cross section taper shape C1 Axis direction of taper section C2 Center of valve body C3 Center of rotation of rotation shaft C4 Valve body center axis

Claims (3)

内部に流体が流通する流体通路の形成されたハウジングと、該ハウジングに形成された軸受部に回転可能に軸支された回転軸と、該回転軸に固定されて上記流体通路を開閉する円盤状の弁体とを備え、
上記流体通路は所定の軸方向に沿って内周面が縮小する断面テーパ形状を有し、また上記弁体の中心と上記回転軸の回転中心とが離隔している弁装置において、
上記弁体はその外周が薄肉状で真円に形成された当接部を備え、
上記回転軸の回転中心を、上記当接部が形成する平面に直交するとともに当接部の中心を通過する弁体中心軸と交差するように設け、
上記弁体が上記流体通路を閉鎖した状態において、上記弁体の弁体中心軸が上記断面テーパ形状の軸方向に対して所定の角度で傾斜して、上記当接部の全周が上記流体通路の断面テーパ形状に接触し、
その際上記ハウジングの断面テーパ形状を、上記当接部が形成する平面で切断すると、その断面形状が真円となり、
そして弁体を開放状態とする際には、上記弁体の弁体中心軸と上記断面テーパ形状の軸方向との角度を、上記閉鎖状態における傾斜角度よりも大きく傾斜させるように上記回転軸を回転させることを特徴とする弁装置。 A housing formed with a fluid passage through which a fluid flows, a rotary shaft rotatably supported by a bearing portion formed in the housing, and a disk shape fixed to the rotary shaft to open and close the fluid passage With a valve body,
In the valve device, the fluid passage has a tapered cross-sectional shape in which an inner peripheral surface is reduced along a predetermined axial direction, and the center of the valve body and the rotation center of the rotating shaft are separated from each other.
The valve body includes a contact portion formed in a perfect circle with a thin outer periphery,
The rotation center of the rotation shaft is provided so as to intersect with the central axis of the valve body that is orthogonal to the plane formed by the contact portion and passes through the center of the contact portion,
In a state where the valve body closes the fluid passage, the valve body central axis of the valve body is inclined at a predetermined angle with respect to the axial direction of the tapered section, and the entire circumference of the contact portion is the fluid. In contact with the tapered cross-section of the passage,
At that time, when the cross-sectional taper shape of the housing is cut by a plane formed by the contact portion, the cross-sectional shape becomes a perfect circle,
When the valve body is in the open state, the rotation shaft is set so that the angle between the valve body central axis of the valve body and the axial direction of the tapered section is larger than the inclination angle in the closed state. A valve device characterized by rotating. 上記弁体を金属によって一体成形して、上記当接部を金属製としたことを特徴とする請求項１に記載の弁装置。   The valve device according to claim 1, wherein the valve body is integrally formed of metal, and the contact portion is made of metal. 上記ハウジングを金属によって成形し、上記弁体とハウジングの内周面の上記断面テーパ形状とをメタルタッチさせることを特徴とする請求項２に記載の弁装置。   The valve device according to claim 2, wherein the housing is formed of metal, and the valve body and the cross-sectional tapered shape of the inner peripheral surface of the housing are metal touched.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009069240A1 (en) * 2007-11-28 2009-06-04 Mitsubishi Electric Corporation Valve element mechanism for exhaust gas circulation valve
US20100219363A1 (en) * 2006-08-14 2010-09-02 Borgwarner Inc. Low force anti sticking throttle valve
WO2011017407A2 (en) * 2009-08-04 2011-02-10 Borgwarner Inc. Engine breathing system valve and products including the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100219363A1 (en) * 2006-08-14 2010-09-02 Borgwarner Inc. Low force anti sticking throttle valve
WO2009069240A1 (en) * 2007-11-28 2009-06-04 Mitsubishi Electric Corporation Valve element mechanism for exhaust gas circulation valve
WO2011017407A2 (en) * 2009-08-04 2011-02-10 Borgwarner Inc. Engine breathing system valve and products including the same

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