JP2017180638A - Motor valve - Google Patents

Motor valve Download PDF

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Publication number
JP2017180638A
JP2017180638A JP2016067899A JP2016067899A JP2017180638A JP 2017180638 A JP2017180638 A JP 2017180638A JP 2016067899 A JP2016067899 A JP 2016067899A JP 2016067899 A JP2016067899 A JP 2016067899A JP 2017180638 A JP2017180638 A JP 2017180638A
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valve
packing
valve member
pair
rim
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元康 石黒
motoyasu Ishiguro
元康 石黒
雄希 北見
Yuki Kitami
雄希 北見
珠実 田邊
tamami Tanabe
珠実 田邊
大樹 中川
Daiki Nakagawa
大樹 中川
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2016067899A priority Critical patent/JP2017180638A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a pressure balance type motor valve capable of robustly holding an L packing of a seal part to a valve member.SOLUTION: A seal part 4 comprises a pair of L packings 41, 41, a reinforcement plate 42, and a pair of tootled lock springs 43, 43. The L packing 41 comprises a toric substrate part 41a and a rim part 41b. The reinforcement plate 42 is held with a pair of substrate parts 41a, 41a, and the toothed lock spring 43 is fitted into the rim part 41b of the L packing 41. With a boss part 32 of a valve body 3A and a boss part 34 of a connection part 3B, the toothed lock spring 43, the substrate part 41a of the L packing 41 and the reinforcement plate 42 are held. The thickness of the substrate part 41a is made thicker than the thickness of the rim part 41b.SELECTED DRAWING: Figure 2

Description

本発明は、冷凍サイクルなどに使用する電動弁に関し、詳細には圧力バランス型の電動弁に関する。   The present invention relates to a motor-operated valve for use in a refrigeration cycle, and more particularly to a pressure balance type motor-operated valve.

従来の圧力バランス型の電動弁は、弁部材に加わる差圧力をキャンセルするために、弁部材の上部の背圧室を、弁部材に設けた均圧路により弁部材下部の弁ポート側に導通し、弁部材の上部と下部を同圧にさせることで、弁部材に加わる正味の差圧力をキャンセルさせるという設計思想である。このような電動弁として、例えば、特開２０１４−０３５００６号公報（特許文献１）に開示されたものがある。   In order to cancel the differential pressure applied to the valve member, the conventional pressure balance type motorized valve conducts the back pressure chamber at the upper part of the valve member to the valve port side at the lower part of the valve member by a pressure equalizing path provided in the valve member. The design philosophy is to cancel the net differential pressure applied to the valve member by making the upper and lower parts of the valve member the same pressure. As such a motor operated valve, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2014-035006 (Patent Document 1).

この従来の電動弁は、弁ガイド本体部（２１）内に弁部材（３０）を配設し、弁部材（３０）に設けたパッキン部（３７）により、弁ガイド本体部（２１）の内周面（２１ｃ）と弁部材（３０）の外周との間をシールしている。そして、弁部材（３０）は弁ガイド本体部（２１）にガイドされて摺動可能になっている。また、パッキン部（３７）は、連結金具（３４）と弁部材（３０）との間に、皿ばね受け（３８）等を介して狭持されている。   In this conventional motorized valve, a valve member (30) is disposed in a valve guide main body (21), and a packing portion (37) provided in the valve member (30) is provided in the valve guide main body (21). The space between the peripheral surface (21c) and the outer periphery of the valve member (30) is sealed. The valve member (30) is slidably guided by the valve guide main body (21). The packing part (37) is sandwiched between the coupling fitting (34) and the valve member (30) via a disc spring receiver (38) or the like.

特開２０１４−０３５００６号公報JP 2014-035006 A

上述した従来の圧力バランス型の電動弁では、パッキンン部を連結金具と弁部材とで挟持することで、簡単な構造でパッキン部を保持できる。しかし、このパッキン部は、弁ガイド本体部の内周面に摺接することにより、挟持している基板部が半径方向に力を受ける。このため、パッキン部の強度を確保する必要がある。なお、パッキン部全体を堅牢にしようとすると、弁ガイド本体部の内周面との間の摺動抵抗が大きくなるという問題がある。   In the conventional pressure balance type electric valve described above, the packing portion can be held with a simple structure by sandwiching the packing portion between the connecting fitting and the valve member. However, the packing portion is in sliding contact with the inner peripheral surface of the valve guide main body portion, so that the sandwiched substrate portion receives a force in the radial direction. For this reason, it is necessary to ensure the strength of the packing part. In addition, when trying to make the whole packing part robust, there exists a problem that sliding resistance between the inner peripheral surfaces of a valve guide main-body part becomes large.

本発明は、圧力バランス型の電動弁において、ガイド部の内周面と弁部材の外周面との間をシールするシール部のＬパッキンを堅牢にすることを課題とする。   An object of the present invention is to make an L packing of a seal portion that seals between an inner peripheral surface of a guide portion and an outer peripheral surface of a valve member in a pressure balance type motor operated valve.

請求項１の電動弁は、弁ハウジング内に配設された円筒形状のガイド部と、前記ガイド部内に摺動可能に配設されるとともに弁ポートを開閉する弁部材と、前記弁部材に設けられて前記ガイド部の内周面と該弁部材の外周面との間をシールするシール部と、前記弁部材を前記ガイド部の軸線方向に駆動する駆動部と、を備え、前記弁部材を軸線方向に移動して前記弁ポートを開閉するとともに、前記弁部材に対する前記弁ポートとは反対側の背圧室と該弁ポートとを均圧路で導通して、該背圧室の流体圧力と弁ポートの流体圧力とを均一にするようにした電動弁であって、前記シール部が、前記ガイド部の内周面に摺接するリム部と、前記弁部材により保持される基板部とからなるＬパッキンを有し、前記Ｌパッキンの前記基板部の厚みが前記リム部の厚みより厚くなっていることを特徴とする。   The motor-driven valve according to claim 1 is provided in the valve member, a cylindrical guide portion disposed in the valve housing, a valve member that is slidably disposed in the guide portion, and that opens and closes a valve port. A seal portion that seals between the inner peripheral surface of the guide portion and the outer peripheral surface of the valve member, and a drive portion that drives the valve member in the axial direction of the guide portion, and the valve member The valve port is opened and closed by moving in the axial direction, and the back pressure chamber opposite to the valve port with respect to the valve member is connected to the valve port through a pressure equalizing path, so that the fluid pressure in the back pressure chamber And the fluid pressure of the valve port, wherein the seal portion includes a rim portion that is in sliding contact with the inner peripheral surface of the guide portion, and a substrate portion that is held by the valve member. And the thickness of the substrate portion of the L packing is Characterized in that it is thicker than the thickness of the rim portion.

請求項２の電動弁は、請求項１に記載の電動弁であって、前記弁部材が、前記弁ポートを開閉する弁体と、前記駆動部側に連結される連結部とから構成され、前記Ｌパッキンの前記基板部が、前記弁体と前記連結部とにより挟まれて、前記シール部が前記弁部材に挟持されていることを特徴とする。   The motor-driven valve according to claim 2 is the motor-operated valve according to claim 1, wherein the valve member includes a valve body that opens and closes the valve port, and a connecting portion that is connected to the drive portion side, The base portion of the L packing is sandwiched between the valve body and the connecting portion, and the seal portion is sandwiched between the valve members.

請求項３の電動弁は、請求項２に記載の電動弁であって、前記シール部が、一対の前記Ｌパッキンと、該一対のＬパッキンの間に介在される補強板とを備え、前記一対のＬパッキンは、一対の前記リム部が前記軸線方向の互いに外側に向けて配置されるとともに、一対の前記基板部により前記補強板を挟むようにして、前記シール部が前記弁部材に挟持されていることを特徴とする。   The motor-operated valve according to claim 3 is the motor-operated valve according to claim 2, wherein the seal portion includes a pair of the L packings and a reinforcing plate interposed between the pair of L packings, The pair of L packings are arranged such that the pair of rim portions are disposed outward in the axial direction, and the seal portion is sandwiched by the valve member so that the reinforcing plate is sandwiched between the pair of substrate portions. It is characterized by being.

請求項４の電動弁は、請求項３に記載の電動弁であって、前記Ｌパッキンの前記基板部と前記リム部との境界である基点部が、前記補強板の外周縁よりも前記軸線側の内側に位置していることを特徴とする。   The motor-operated valve according to claim 4 is the motor-operated valve according to claim 3, wherein a base point portion that is a boundary between the base plate portion and the rim portion of the L packing is more than the outer peripheral edge of the reinforcing plate. It is located inside the side.

請求項１の電動弁によれば、シール部のＬパッキンにおいて、基板部の厚みがリム部の厚みより厚くなっているので、シール部を、基板部にて前記弁部材に確実に保持できるとともにＬパッキンを堅牢にすることができる。   According to the electric valve of the first aspect, in the L packing of the seal portion, since the thickness of the substrate portion is thicker than the thickness of the rim portion, the seal portion can be reliably held on the valve member at the substrate portion. L packing can be made robust.

請求項２の電動弁によれば、請求項１の効果に加えて、シール部を弁部材の弁体と連結部との簡単な構造で保持することができる。   According to the electric valve of the second aspect, in addition to the effect of the first aspect, the seal portion can be held with a simple structure of the valve body of the valve member and the connecting portion.

請求項３の電動弁によれば、請求項２の効果に加えて、シール部の一対のＬパッキンにより、ガイド部の内周面と弁部材の外周面との間を確実にシールすることができる。   According to the electric valve of the third aspect, in addition to the effect of the second aspect, the pair of L packings of the seal portion can surely seal between the inner peripheral surface of the guide portion and the outer peripheral surface of the valve member. it can.

請求項４の電動弁は、によれば、請求項３の効果に加えて、Ｌパッキンの基点部が補強板の外周縁よりも内側にあるので、Ｌパッキンを補強板で確実に受け止めることができる。   According to the fourth aspect of the present invention, in addition to the effect of the third aspect, since the base point of the L packing is inside the outer peripheral edge of the reinforcing plate, the L packing can be reliably received by the reinforcing plate. it can.

本発明の実施形態の電動弁の弁閉状態の縦断面図である。It is a longitudinal cross-sectional view of the valve closed state of the electric valve of the embodiment of the present invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 実施形態におけるＬパッキンの断面図及び平面図である。It is sectional drawing and a top view of L packing in an embodiment.

次に、本発明の電動弁の実施形態を図面を参照して説明する。図１は実施形態の電動弁の弁閉状態の縦断面図、図２は図１の要部拡大図である。なお、以下の説明における「上下」の概念は図１の図面における上下に対応する。この実施形態の電動弁は、略円筒形状の弁ハウジング１を有しており、弁ハウジング１には円筒状の弁室１Ａが形成されている。また、弁ハウジング１には、側面側から弁室１Ａに連通する継手管１１が取り付けられるとともに、下端部に弁座部材１３が取り付けられている。弁座部材１３の中央には円形の弁ポート１３ａが形成されるとともに、弁ポート１３ａの開口周囲にすり鉢状の着座面１３ｂが形成されている。また、弁座部材１３には弁ポート１３ａに連通するように弁室１Ａの軸線Ｘ方向に継手管１２が取り付けられている。   Next, an embodiment of the motor-operated valve of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a motor-operated valve according to the embodiment in a closed state, and FIG. 2 is an enlarged view of a main part of FIG. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawing of FIG. The electric valve of this embodiment has a substantially cylindrical valve housing 1, and a cylindrical valve chamber 1 </ b> A is formed in the valve housing 1. In addition, a joint pipe 11 communicating with the valve chamber 1A from the side surface side is attached to the valve housing 1, and a valve seat member 13 is attached to the lower end portion. A circular valve port 13a is formed at the center of the valve seat member 13, and a mortar-shaped seating surface 13b is formed around the opening of the valve port 13a. A joint pipe 12 is attached to the valve seat member 13 in the direction of the axis X of the valve chamber 1A so as to communicate with the valve port 13a.

弁室１Ａ内には、弁ハウジング１の上端から内挿された中空多段円筒状の弁ガイド部材２が配設されている。この弁ガイド部材２は、軸線Ｘを中心軸として、弁ポート１３ａ側に位置する小径で円筒形状のガイド部２１と、ガイド部２１より径の大きな中径円筒部２２と、弁ハウジング１の上端に填め込まれた大径の取付け部２３とを、一体に形成したものである。ガイド部２１内にはピストン状の弁部材３が軸線Ｘ方向に移動可能に配設されている。そして、弁部材３の一部が弁ガイド部材２内に収容されることにより、弁ガイド部材２の内空間が区画され、弁ガイド部材２内に弁部材３に対する背圧室２Ａが形成されている。   A hollow multistage cylindrical valve guide member 2 inserted from the upper end of the valve housing 1 is disposed in the valve chamber 1A. The valve guide member 2 has a small-diameter cylindrical guide portion 21 located on the valve port 13a side with an axis X as a central axis, a medium-diameter cylindrical portion 22 having a larger diameter than the guide portion 21, and an upper end of the valve housing 1. And a large-diameter mounting portion 23 that is inserted into the housing. A piston-like valve member 3 is disposed in the guide portion 21 so as to be movable in the axis X direction. Then, when a part of the valve member 3 is accommodated in the valve guide member 2, the inner space of the valve guide member 2 is partitioned, and a back pressure chamber 2 </ b> A for the valve member 3 is formed in the valve guide member 2. Yes.

弁部材３は、全体として略円柱形状に形成されており、この弁部材３は、略円柱状の弁体３Ａと後述のステッピングモータ７に連結する連結部３Ｂとを有している。弁体３Ａは、着座面１３ｂと対向する円柱形状の円柱部３１と、円柱部３１より径の小さなボス部３２とを有している。そして、この弁体３Ａには、その中央に連結穴３ａが形成されている。連結部３Ｂは、弁体３Ａの連結穴３ａに嵌合する連結軸３３と、ボス部３２と同径で略円柱形状をしたボス部３４とを有している。そして、弁体３Ａと連結部３Ｂとは、ボス部３２とボス部３４との間に後述のシール部４を挟み込んだ状態で、固着されている。すなわち、弁体３Ａの連結穴３ａ内に連結部３Ｂの連結軸３３を嵌合し、連結軸３３の下端部と円柱部３１の下端部において溶接することにより、互いに固着されている。また、連結部３Ｂには、連結軸３３の中央に弁ポート１３ａ側から上方に延びる均圧路３ｂと、この縦の均圧路３ｂに連なって背圧室２Ａに開口する均圧路３ｃとを有している。そして、この均圧路３ｂ，３ｃは、弁ポート１３ａと背圧室２Ａとを導通する。   The valve member 3 is formed in a substantially cylindrical shape as a whole, and this valve member 3 has a substantially cylindrical valve body 3A and a connecting portion 3B connected to a stepping motor 7 described later. The valve body 3 </ b> A includes a cylindrical columnar portion 31 facing the seating surface 13 b and a boss portion 32 having a smaller diameter than the cylindrical portion 31. And in this valve body 3A, the connection hole 3a is formed in the center. The connecting portion 3B has a connecting shaft 33 that fits in the connecting hole 3a of the valve body 3A, and a boss portion 34 that has the same diameter as the boss portion 32 and has a substantially cylindrical shape. The valve body 3A and the connecting portion 3B are fixed in a state where a seal portion 4 described later is sandwiched between the boss portion 32 and the boss portion 34. That is, the connecting shaft 33 of the connecting portion 3B is fitted into the connecting hole 3a of the valve body 3A, and the lower end portion of the connecting shaft 33 and the lower end portion of the column portion 31 are welded to each other, thereby being fixed to each other. In addition, the connecting portion 3B includes a pressure equalizing path 3b extending upward from the valve port 13a side in the center of the connecting shaft 33, and a pressure equalizing path 3c that opens to the back pressure chamber 2A in communication with the vertical pressure equalizing path 3b. have. The pressure equalizing paths 3b and 3c conduct the valve port 13a and the back pressure chamber 2A.

弁ガイド部材２の上部にはフランジ金具５１によって支持部材５が固着されており、この支持部材５には軸線Ｘ方向に挿通孔５２が形成されるとともに、挿通孔５２と後述のケース７２内とを導通する導通孔５３が形成されている。挿通孔５２には円筒状の弁ホルダ６が軸線Ｘ方向に移動可能に挿通され、この弁ホルダ６の下端部に連結部３Ｂのボス部３４が固着されている。また、弁ホルダ６は、「駆動部」としての後述するステッピングモータ７のロータ軸７１に係合している。   A support member 5 is fixed to the upper portion of the valve guide member 2 by a flange fitting 51, and an insertion hole 52 is formed in the support member 5 in the axis X direction. A conduction hole 53 that conducts the current is formed. A cylindrical valve holder 6 is inserted into the insertion hole 52 so as to be movable in the direction of the axis X, and the boss portion 34 of the connecting portion 3 </ b> B is fixed to the lower end portion of the valve holder 6. Further, the valve holder 6 is engaged with a rotor shaft 71 of a stepping motor 7 described later as a “drive unit”.

ロータ軸７１の下端部にはフランジ部７１ａが一体に形成され、このフランジ部７１ａが弁ホルダ６の上端の保持部６１と共に平滑部材としてのワッシャ６２を挟み込み、このロータ軸７１の下端部が弁ホルダ６の上端部で回転可能に係合している。この係合により、弁ホルダ６がロータ軸７１によって回転可能に吊り下げた状態で支持されている。また、弁ホルダ６内には、バネ受け６３が軸線Ｘ方向に移動可能に設けられ、バネ受け６３と連結部３Ｂのボス部３４との間には圧縮コイルバネ６４が所定の荷重を与えられた状態で取り付けられている。これにより、バネ受け６３がロータ軸７１の下端部に当接係合し、弁部材３はロータ軸７１に対して下方側に付勢されている。ロータ軸７１には雄ねじ部７１ｂが形成されており、この雄ねじ部７１ｂは支持部材５に形成された雌ねじ部５ａに螺合している。これにより、ロータ軸７１は回転に伴って軸線Ｘ方向に移動する。   A flange portion 71a is integrally formed at the lower end portion of the rotor shaft 71. The flange portion 71a sandwiches a washer 62 as a smooth member together with a holding portion 61 at the upper end of the valve holder 6, and the lower end portion of the rotor shaft 71 is a valve portion. The upper end of the holder 6 is engaged so as to be rotatable. Due to this engagement, the valve holder 6 is supported by the rotor shaft 71 in a state of being rotatably suspended. A spring receiver 63 is provided in the valve holder 6 so as to be movable in the direction of the axis X, and a compression coil spring 64 is given a predetermined load between the spring receiver 63 and the boss portion 34 of the connecting portion 3B. It is attached in a state. As a result, the spring receiver 63 comes into contact with and engages with the lower end of the rotor shaft 71, and the valve member 3 is urged downward with respect to the rotor shaft 71. A male screw portion 71 b is formed on the rotor shaft 71, and the male screw portion 71 b is screwed into a female screw portion 5 a formed on the support member 5. Thereby, the rotor shaft 71 moves in the direction of the axis X along with the rotation.

弁ハウジング１の上部には、「駆動部」としてのステッピングモータ７が取り付けられている。ステッピングモータ７は、前記ロータ軸７１、ケース７２、マグネットロータ７３、ステータコイル７４で構成されている。ケース７２は、支持部材５のフランジ金具５１と共に、弁ハウジング１に溶接等によって気密に固定されている。ケース７２内には、外周部を多極に着磁されたマグネットロータ７３が回転可能に設けられ、このマグネットロータ７３にはロータ軸７１が固着されている。なお、ケース７２の天井部にはマグネットロータ７３の突起７３ａに連動してマグネットロータ７３の回転を規制する回転ストッパ機構８が設けられている。また、ケース７２の外周には、ステータコイル７４が配設されており、ステッピングモータ７は、ステータコイル７４にパルス信号が与えられることにより、そのパルス数に応じてマグネットロータ７３を回転させる。   A stepping motor 7 as a “drive unit” is attached to the upper portion of the valve housing 1. The stepping motor 7 includes the rotor shaft 71, a case 72, a magnet rotor 73, and a stator coil 74. The case 72 is airtightly fixed to the valve housing 1 together with the flange fitting 51 of the support member 5 by welding or the like. In the case 72, a magnet rotor 73 having an outer peripheral portion magnetized in multiple poles is rotatably provided, and a rotor shaft 71 is fixed to the magnet rotor 73. A rotation stopper mechanism 8 that restricts the rotation of the magnet rotor 73 in conjunction with the protrusion 73 a of the magnet rotor 73 is provided on the ceiling of the case 72. A stator coil 74 is disposed on the outer periphery of the case 72, and the stepping motor 7 rotates the magnet rotor 73 according to the number of pulses when a pulse signal is given to the stator coil 74.

以上の構成により、ステッピングモータ７の駆動により、マグネットロータ７３及びロータ軸７１が回転し、ロータ軸７１の雄ねじ部７１ｂと支持部材５の雌ねじ部５ａとのネジ送り機構により、ロータ軸７１が軸線Ｘ方向に移動する。これにより、弁部材３が軸線Ｘ方向に移動し、弁部材３は弁ガイド部材２のガイド部２１にガイドされて、この弁部材３が着座面１３ｂに対して離座／着座する。これにより、弁ポート１３ａが開閉される。このように、弁部材３がガイド部２１にガイドされるとき、シール部４はガイド部２１のガイド面２１ａに沿って摺動する。   With the above configuration, the magnet rotor 73 and the rotor shaft 71 are rotated by the driving of the stepping motor 7, and the rotor shaft 71 is rotated by the screw feed mechanism between the male screw portion 71 b of the rotor shaft 71 and the female screw portion 5 a of the support member 5. Move in the X direction. As a result, the valve member 3 moves in the direction of the axis X, the valve member 3 is guided by the guide portion 21 of the valve guide member 2, and the valve member 3 is separated from / seated on the seating surface 13b. Thereby, the valve port 13a is opened and closed. Thus, when the valve member 3 is guided by the guide portion 21, the seal portion 4 slides along the guide surface 21 a of the guide portion 21.

この実施形態の電動弁は、流体（冷媒）が継手管１１から流入して継手管１２から流出する第１の流れ（図１の実線の矢印の流れ）と、流体が継手管１２から流入して継手管１１から流出する第２の流れ（図１の破線の矢印の流れ）との、２通りの流れの制御に用いられる。継手管１１に連通する弁室１Ａの圧力は、弁部材３の円柱部３１とガイド部２１とのクリアランスを介してガイド部２１内のシール部４の下方の空間に導入される。また、継手管１２に連通する弁ポート１３ａの圧力は、弁部材３の均圧路３ｂ，３ｃを介して背圧室２Ａ（シール部４の上方の空間）に導入される。シール部４は、このシール部４の下方の空間と背圧室２Ａとの間をシールしている。   In the motor-operated valve according to this embodiment, a fluid (refrigerant) flows from the joint pipe 11 and flows out from the joint pipe 12 (flow indicated by a solid line arrow in FIG. 1), and a fluid flows from the joint pipe 12. And the second flow (flow indicated by the broken arrow in FIG. 1) flowing out from the joint pipe 11 is used to control two types of flow. The pressure in the valve chamber 1 </ b> A communicating with the joint pipe 11 is introduced into the space below the seal portion 4 in the guide portion 21 through the clearance between the cylindrical portion 31 of the valve member 3 and the guide portion 21. Further, the pressure of the valve port 13 a communicating with the joint pipe 12 is introduced into the back pressure chamber 2 </ b> A (the space above the seal portion 4) via the pressure equalizing passages 3 b and 3 c of the valve member 3. The seal portion 4 seals between the space below the seal portion 4 and the back pressure chamber 2A.

そして、第１の流れのときは、弁ポート１３ａの低圧が均圧路３ｂ，３ｃを介して背圧室２Ａに導入される。また、第２の流れのときは、弁ポート１３ａ側の高圧が均圧路３ｂ，３ｃを介して背圧室２Ａに導入される。したがって、弁部材３に対して弁ポート１３ａと背圧室２Ａとの両側から同じ圧力が作用する。これにより、流体の高圧と低圧との差圧による力は弁部材３に対して軸線Ｘ方向で相殺され、圧力バランスが保たれる。   During the first flow, the low pressure of the valve port 13a is introduced into the back pressure chamber 2A via the pressure equalizing passages 3b and 3c. In the second flow, the high pressure on the valve port 13a side is introduced into the back pressure chamber 2A via the pressure equalizing passages 3b and 3c. Therefore, the same pressure acts on the valve member 3 from both sides of the valve port 13a and the back pressure chamber 2A. Thereby, the force due to the differential pressure between the high pressure and the low pressure of the fluid is canceled in the direction of the axis X with respect to the valve member 3, and the pressure balance is maintained.

シール部４は、フッ素樹脂、例えばＰＴＦＥ、ＰＦＡ製の一対のＬパッキン４１，４１と、金属板からなる円環状の補強板４２と、薄手の金属板からなる一対の菊ばね４３，４３とで構成されている。そして、Ｌパッキン４１，４１の間に補強板４２を挟み込んで、Ｌパッキン４１，４１の内側に菊ばね４３，４３が嵌め込まれている。また、Ｌパッキン４１、補強板４２、菊ばね４３は、それぞれ中央に開口を有しており、その開口に連結部３Ｂの連結軸３３を貫通させ、弁部材３の弁体３Ａ側のボス部３２と連結部３Ｂ側のボス部３４とで、菊ばね４３，４３を押さえ付けるようにして、シール部４が弁部材３に取り付けられている。   The seal portion 4 includes a pair of L packings 41 and 41 made of a fluororesin, for example, PTFE and PFA, an annular reinforcing plate 42 made of a metal plate, and a pair of chrysanthemum springs 43 and 43 made of a thin metal plate. It is configured. A reinforcing plate 42 is sandwiched between the L packings 41 and 41, and chrysanthemum springs 43 and 43 are fitted inside the L packings 41 and 41. Each of the L packing 41, the reinforcing plate 42, and the chrysanthemum spring 43 has an opening in the center, and the connecting shaft 33 of the connecting portion 3B is passed through the opening so that the boss portion on the valve body 3A side of the valve member 3 is provided. The seal portion 4 is attached to the valve member 3 so that the chrysanthemum springs 43 and 43 are pressed by the boss portion 34 on the side of the connecting portion 3 </ b> B.

図３に示すように、Ｌパッキン４１は、切削加工により形成されており、円環状の基板部４１ａと、基板部４１ａの外周からこの基板部４１ａと略直角となる方向（軸線Ｘ方向）に立設されたリム部４１ｂとで構成されている。リム部４１ｂはガイド部２１のガイド面２１ａに押圧されて摺接する部分であり、このシール部４とガイド面２１ａとの間をシールする。基板部４１ａは補強板４２と菊ばね４３（及びボス部３２またはボス部３４）によって挟み込まれる部分であり、基板部４１ａの厚みｄ１はリム部４１ｂの厚みｄ２より厚くなっている。例えば、基板部４１ａの厚みｄ１は０．４ｍｍ、リム部４１ｂの厚みｄ２は０．２５ｍｍとなっている。このように、基板部４１ａは、補強板４２と菊ばね４３（及びボス部３２またはボス部３４）の挟持による保持構成として十分に堅牢な厚みとなっている。   As shown in FIG. 3, the L packing 41 is formed by cutting, and has an annular substrate part 41 a and a direction (axis X direction) substantially perpendicular to the substrate part 41 a from the outer periphery of the substrate part 41 a. The rim portion 41b is erected. The rim portion 41b is a portion that is pressed and slidably contacted with the guide surface 21a of the guide portion 21, and seals between the seal portion 4 and the guide surface 21a. The substrate portion 41a is a portion sandwiched between the reinforcing plate 42 and the chrysanthemum spring 43 (and the boss portion 32 or the boss portion 34), and the thickness d1 of the substrate portion 41a is thicker than the thickness d2 of the rim portion 41b. For example, the thickness d1 of the substrate portion 41a is 0.4 mm, and the thickness d2 of the rim portion 41b is 0.25 mm. As described above, the substrate portion 41a has a sufficiently robust thickness as a holding configuration by sandwiching the reinforcing plate 42 and the chrysanthemum spring 43 (and the boss portion 32 or the boss portion 34).

また、Ｌパッキン４１の基板部４１ａとリム部４１ｂとの境界である基点部は、補強板４２の外周縁よりも軸線Ｘ側の内側に位置している。これにより、Ｌパッキン４１に対して図の白抜き矢印で示すような圧力が加わっても、このＬパッキン４１を補強板４２で確実に受け止めることができる。また、リム部４１ｂが基板部４１ａよりも薄くなっている分だけＬパッキン４１内の空間を外周方向に広くすることができ、ボス部３２，３４で挟持される部分の面積を広くでき、挟持力が強くなるとともに、シール性も高くなる。さらに、Ｌパッキン４１は切削加工により形成しているので、リム部４１ｂや基板部４１ａの厚みを容易に調整することができる。   Further, a base point portion that is a boundary between the substrate portion 41 a and the rim portion 41 b of the L packing 41 is located on the inner side on the axis X side with respect to the outer peripheral edge of the reinforcing plate 42. Thereby, even if the pressure as shown with the white arrow of a figure is added with respect to L packing 41, this L packing 41 can be reliably received with the reinforcement board 42. FIG. Further, the space in the L packing 41 can be widened in the outer peripheral direction by the amount that the rim portion 41b is thinner than the substrate portion 41a, and the area of the portion sandwiched between the boss portions 32 and 34 can be widened. As the force increases, the sealing performance also increases. Furthermore, since the L packing 41 is formed by cutting, the thickness of the rim portion 41b and the substrate portion 41a can be easily adjusted.

また、Ｌパッキン４１は、シール部４において背合わせ状に一対設けられている。そして、このＬパッキン４１のリム部４１ｂ内が高圧となるとき、この高圧の圧力はリム部４１ｂをガイド面２１ａに押しつけるように作用するため、シール部４は前記第１の流れの時も第２の流れのときも、このシール部４の両側の空間を確実にシールする。   A pair of L packings 41 are provided back to back in the seal portion 4. When the inside of the rim portion 41b of the L packing 41 becomes high pressure, the high pressure pressure acts to press the rim portion 41b against the guide surface 21a, so that the seal portion 4 is also in the first flow. Even in the case of 2 flows, the space on both sides of the seal portion 4 is securely sealed.

この実施形態では、シール部４は菊ばね４３を備えており、この菊ばね４３はリム部４１ｂを内側からガイド面２１ａ側に押圧しているので、例えばリム部４１ｂが内側に反り返るようなこともない。   In this embodiment, the seal part 4 is provided with a chrysanthemum spring 43, and this chrysanthemum spring 43 presses the rim part 41b from the inner side toward the guide surface 21a, so that, for example, the rim part 41b warps inward. Nor.

以上、本発明の実施の形態について図面を参照して詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。   As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

１ 弁ハウジング
１Ａ 弁室
１１ 継手管
１２ 継手管
１３ 弁座部材
１３ａ 弁ポート
１３ｂ 着座面
２ 弁ガイド部材
２１ ガイド部
２Ａ 背圧室
３ 弁部材
３ｂ 均圧路
３ｃ 均圧路
３Ａ 弁体
３Ｂ 連結部
３１ 円柱部
３２ ボス部
３ａ 連結穴
３３ 連結軸
３４ ボス部
４ シール部
４ シール部
４１ Ｌパッキン
４１ａ 基板部
４１ｂ リム部
４２ 補強板
４３ 菊ばね
５ 支持部材
５ａ 雌ねじ部
５１ フランジ金具
６ 弁ホルダ
７ ステッピングモータ（駆動部）
７１ ロータ軸
７１ｂ 雄ねじ部
Ｘ 軸線 DESCRIPTION OF SYMBOLS 1 Valve housing 1A Valve chamber 11 Joint pipe 12 Joint pipe 13 Valve seat member 13a Valve port 13b Seating surface 2 Valve guide member 21 Guide part 2A Back pressure chamber 3 Valve member 3b Pressure equalization path 3c Pressure equalization path 3A Valve body 3B Connection part 31 Cylindrical part 32 Boss part 3a Connection hole 33 Connection shaft 34 Boss part 4 Seal part 4 Seal part 41 L packing 41a Substrate part 41b Rim part 42 Reinforcement plate 43 Chrysanthemum spring 5 Support member 5a Female thread part 51 Flange fitting 6 Valve holder 7 Stepping Motor (drive unit)
71 Rotor shaft 71b Male thread X axis

Claims (4)

弁ハウジング内に配設された円筒形状のガイド部と、前記ガイド部内に摺動可能に配設されるとともに弁ポートを開閉する弁部材と、前記弁部材に設けられて前記ガイド部の内周面と該弁部材の外周面との間をシールするシール部と、前記弁部材を前記ガイド部の軸線方向に駆動する駆動部と、を備え、前記弁部材を軸線方向に移動して前記弁ポートを開閉するとともに、前記弁部材に対する前記弁ポートとは反対側の背圧室と該弁ポートとを均圧路で導通して、該背圧室の流体圧力と弁ポートの流体圧力とを均一にするようにした電動弁であって、
前記シール部が、前記ガイド部の内周面に摺接するリム部と、前記弁部材により保持される基板部とからなるＬパッキンを有し、前記Ｌパッキンの前記基板部の厚みが前記リム部の厚みより厚くなっている
ことを特徴とする電動弁。 A cylindrical guide portion disposed in the valve housing; a valve member slidably disposed in the guide portion and opening and closing a valve port; and an inner periphery of the guide portion provided in the valve member A seal portion that seals between the surface and the outer peripheral surface of the valve member, and a drive portion that drives the valve member in the axial direction of the guide portion, and moves the valve member in the axial direction to move the valve The valve is opened and closed, and the back pressure chamber opposite to the valve port with respect to the valve member is connected to the valve port through a pressure equalizing path, so that the fluid pressure in the back pressure chamber and the fluid pressure in the valve port are A motorized valve designed to be uniform,
The seal portion has an L packing composed of a rim portion that is in sliding contact with the inner peripheral surface of the guide portion and a substrate portion held by the valve member, and the thickness of the substrate portion of the L packing is the rim portion. A motor-operated valve characterized by being thicker than the thickness. 前記弁部材が、前記弁ポートを開閉する弁体と、前記駆動部側に連結される連結部とから構成され、前記Ｌパッキンの前記基板部が、前記弁体と前記連結部とにより挟まれて、前記シール部が前記弁部材に挟持されている
ことを特徴とする請求項１に記載の電動弁。 The valve member includes a valve body that opens and closes the valve port, and a connecting portion connected to the drive portion side, and the base plate portion of the L packing is sandwiched between the valve body and the connecting portion. The motor-operated valve according to claim 1, wherein the seal portion is sandwiched between the valve members. 前記シール部が、一対の前記Ｌパッキンと、該一対のＬパッキンの間に介在される補強板とを備え、
前記一対のＬパッキンは、一対の前記リム部が前記軸線方向の互いに外側に向けて配置されるとともに、一対の前記基板部により前記補強板を挟むようにして、前記シール部が前記弁部材に挟持されている
ことを特徴とする請求項２に記載の電動弁。 The seal portion includes a pair of the L packings and a reinforcing plate interposed between the pair of L packings,
In the pair of L packings, the pair of rim portions are disposed outward in the axial direction, and the seal portion is sandwiched between the valve members such that the pair of substrate portions sandwich the reinforcing plate. The motor-operated valve according to claim 2, wherein the motor-operated valve is provided. 前記Ｌパッキンの前記基板部と前記リム部との境界である基点部が、前記補強板の外周縁よりも前記軸線側の内側に位置していることを特徴とする請求項３に記載の電動弁。   4. The electric motor according to claim 3, wherein a base point portion that is a boundary between the base plate portion and the rim portion of the L packing is located on the inner side of the axial line side than an outer peripheral edge of the reinforcing plate. valve.
JP2016067899A 2016-03-30 2016-03-30 Motor valve Pending JP2017180638A (en)

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CN114135680A (en) * 2018-04-04 2022-03-04 株式会社鹭宫制作所 Electric valve

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JPS438822Y1 (en) * 1964-01-24 1968-04-18
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CN114135680A (en) * 2018-04-04 2022-03-04 株式会社鹭宫制作所 Electric valve
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