JP6831116B2 - Valve device - Google Patents

Valve device Download PDF

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Publication number
JP6831116B2
JP6831116B2 JP2018211483A JP2018211483A JP6831116B2 JP 6831116 B2 JP6831116 B2 JP 6831116B2 JP 2018211483 A JP2018211483 A JP 2018211483A JP 2018211483 A JP2018211483 A JP 2018211483A JP 6831116 B2 JP6831116 B2 JP 6831116B2
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valve
main body
body case
washer
outer peripheral
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JP2020076479A (en
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片山　俊治
俊治 片山
裕貴 浅野
裕貴 浅野
伊東　雅晴
雅晴 伊東
義之 久米
義之 久米
恒 浅野
恒 浅野
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Fujikoki Corp
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Fujikoki Corp
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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
    • 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
    • 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
    • F16K1/32—Details
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)

Description

本発明は、弁装置に関する。 The present invention relates to a valve device.

従来から、例えばカーエアコン等の冷凍サイクルにおいては、蒸発器（エバポレータ）と圧縮機（コンプレッサ）との間に圧力調整用の弁装置を配置し、該圧力調整用の弁装置（圧力調整弁）により蒸発器内の冷媒圧力が所定圧以下とならないように調整して蒸発器の着霜（フロスト）を防止している。 Conventionally, in a refrigeration cycle of a car air conditioner or the like, a valve device for pressure adjustment is arranged between an evaporator (evaporator) and a compressor (compressor), and the valve device for pressure adjustment (pressure adjustment valve). Therefore, the refrigerant pressure in the compressor is adjusted so as not to fall below a predetermined pressure to prevent frosting of the compressor.

このような圧力調整弁の従来技術として、例えば特許文献１に、蒸発器及び圧縮機に繋がる冷媒配管に接続され、冷媒の圧力に応じて本体ケース内でベローズが伸縮することで弁が開閉する弁装置が開示されている。 As a conventional technique of such a pressure adjusting valve, for example, in Patent Document 1, the valve is opened and closed by being connected to a refrigerant pipe connected to an evaporator and a compressor and expanding and contracting a bellows in a main body case according to the pressure of the refrigerant. The valve device is disclosed.

特許文献１に開示されている弁装置においては、ベローズを本体ケースに対して支持するために、ワッシャが設けられている。かかるワッシャは、ベローズの端部に固定された中央部と、該中央部から径方向外方に延在する３本の延出部とを有する。延出部の端部が、フランジと本体ケースの段差部との間で軸線方向に挟持され、更に本体ケースの端部をフランジに対してカシメにより固定することにより、ワッシャが本体ケースに取り付けられることとなる。 In the valve device disclosed in Patent Document 1, a washer is provided to support the bellows with respect to the main body case. Such a washer has a central portion fixed to the end of the bellows and three extending portions radially outward from the central portion. The washer is attached to the main body case by sandwiching the end of the extension portion in the axial direction between the flange and the stepped portion of the main body case, and further fixing the end of the main body case to the flange by caulking. It will be.

ここで、ワッシャの素材は、フランジ及び本体ケースの素材に対して剛性もしくは硬度が高くなっているので、組付時にフランジからワッシャに対して本体ケースの段差部に向かって押圧されるような軸力を付与すると、ワッシャの延出部の端部が当接するフランジ及び本体ケースの段差部が窪むように変形する。この窪みに、延出部の端部が沈み込むので、ワッシャが本体ケースやフランジに対して軸線回りに相対回転不能に支持されることとなる。 Here, since the material of the washer has higher rigidity or hardness than the material of the flange and the main body case, the shaft is pressed from the flange to the washer toward the stepped portion of the main body case at the time of assembly. When a force is applied, the flange to which the end of the extending portion of the washer comes into contact and the stepped portion of the main body case are deformed so as to be recessed. Since the end of the extending portion sinks into this recess, the washer is supported so as not to rotate relative to the main body case and the flange around the axis.

特開２０１５−４３９５号公報JP 2015-4395

しかるに、かかる従来技術ではワッシャの延出部は３本設けられており、窪み量を各延出部において均等に確保しないと、ワッシャが軸線に対して傾いてしまい、弁装置のスムーズな作動を損なう虞れがある。そこで、弁装置の組立時に、本体ケースの端部をフランジに対してカシメで固定する際に、カシメ圧力を均等に付与することが要求されている。しかしながら、カシメ圧力を精度よく均等に付与することは困難な作業が伴うため製造工数が増大し、その結果としてコスト増を招いている。 However, in such a conventional technique, three extension portions of the washer are provided, and if the amount of depression is not evenly secured in each extension portion, the washer tilts with respect to the axis line, and the valve device operates smoothly. There is a risk of damage. Therefore, when assembling the valve device, when the end portion of the main body case is caulked to the flange, it is required to apply the caulking pressure evenly. However, since it is difficult to apply the caulking pressure accurately and evenly, the manufacturing man-hours increase, and as a result, the cost increases.

本発明は上記課題に鑑みてなされたものであって、コスト低減を図りつつ、支持部材を本体ケースに対して精度よく固定することのできる弁装置を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a valve device capable of accurately fixing a support member to a main body case while reducing costs.

上記する課題を解決するために、本発明に係る弁装置は、内周面に段差部が形成された円筒部を有する本体ケースと、前記本体ケース内に収容される弁体と、前記本体ケースの前記段差部に当接配置され、前記弁体を前記本体ケース内で支持する支持部材と、を有する弁本体と、前記本体ケースの前記円筒部に嵌合される嵌合部を有するフランジと、を備え、前記支持部材は、前記弁体に連結される連結部と、前記連結部から径方向外方に延在する延出部と、を有し、前記支持部材の延出部が、前記円筒部の段差部と、前記円筒部に嵌合した前記嵌合部との間で塑性変形するように押圧された状態で、前記円筒部の端部が前記嵌合部に対してカシメにより固定されており、前記円筒部と、前記フランジと、前記支持部材は同じ原料から形成されている。 In order to solve the above-mentioned problems, the valve device according to the present invention includes a main body case having a cylindrical portion having a stepped portion formed on an inner peripheral surface, a valve body housed in the main body case, and the main body case. A valve body having a support member which is abutted against the step portion and supports the valve body in the main body case, and a flange having a fitting portion fitted to the cylindrical part of the main body case. The support member has a connecting portion connected to the valve body and an extending portion extending radially outward from the connecting portion, and the extending portion of the support member comprises. The end of the cylindrical portion is crimped to the fitting portion in a state of being pressed so as to be plastically deformed between the stepped portion of the cylindrical portion and the fitting portion fitted to the cylindrical portion. It is fixed, and the cylindrical portion, the flange, and the support member are formed of the same raw material .

本発明によれば、コスト低減を図りつつ、支持部材を本体ケースに対して精度よく固定することのできる弁装置を提供することにある。 According to the present invention, it is an object of the present invention to provide a valve device capable of accurately fixing a support member to a main body case while reducing costs.

図１は、本発明に係る圧力調整弁の実施形態を示す軸線方向断面図である。FIG. 1 is an axial sectional view showing an embodiment of a pressure regulating valve according to the present invention. 図２は、軸線Ｌ方向に見たワッシャ４の平面図である。FIG. 2 is a plan view of the washer 4 as viewed in the L direction of the axis. 図３は、ワッシャ４の斜視図である。FIG. 3 is a perspective view of the washer 4. 図４は、図１の矢印Ａ部を拡大して示す図である。FIG. 4 is an enlarged view showing an arrow A portion of FIG. 図５は、図１の矢印Ａ部を拡大して示す図であり、プレス装置により荷重を付与する前の状態を示す。FIG. 5 is an enlarged view showing an arrow A portion of FIG. 1, and shows a state before applying a load by a pressing device. 図６は、図１の矢印Ａ部を拡大して示す図であり、プレス装置により荷重を付与した後の状態を示す。FIG. 6 is an enlarged view showing an arrow A portion of FIG. 1, and shows a state after a load is applied by a pressing device. 図７は、変形例にかかるワッシャ４Ａの平面図である。FIG. 7 is a plan view of the washer 4A according to the modified example.

以下、本発明に係る弁装置の実施形態を、図面を参照して説明する。なお、以下では本発明に係る弁装置として、主に、カーエアコン等の冷凍サイクルに使用される圧力調整弁を例示して説明するが、本発明に係る弁装置は前記圧力調整弁の他にも例えば逆止弁等の様々な形態の弁装置に適用することができる。 Hereinafter, embodiments of the valve device according to the present invention will be described with reference to the drawings. In the following, as the valve device according to the present invention, a pressure regulating valve mainly used in a refrigeration cycle of a car air conditioner or the like will be described as an example, but the valve device according to the present invention is described in addition to the pressure regulating valve. Can also be applied to various types of valve devices such as check valves.

＜圧力調整弁の構成＞
本発明に係る実施形態の圧力調整弁の断面図を図１に示す。ここで、圧力調整弁１の軸線をＬとする。 <Composition of pressure control valve>
A cross-sectional view of the pressure regulating valve according to the embodiment of the present invention is shown in FIG. Here, let L be the axis of the pressure regulating valve 1.

図１に示す圧力調整弁１は内部に冷媒を通す冷媒流路を有し、略円筒状の本体ケース２と本体ケース２に収容される弁体３と弁体３を本体ケース２内で支持するワッシャ（支持部材）４とからなる弁本体５と、弁本体５に固着されるフランジ６とを備える。弁本体５及びフランジ６には、例えば蒸発器及び圧縮機に繋がる冷媒配管（不図示）が接続されて冷凍サイクルが形成される。ここで、図１で冷媒の流れを矢印で示すように、圧力調整弁１の右側が冷媒の入口側であり、左側が冷媒の出口側であるものとする。 The pressure regulating valve 1 shown in FIG. 1 has a refrigerant flow path through which a refrigerant passes, and supports a substantially cylindrical main body case 2 and a valve body 3 and a valve body 3 housed in the main body case 2 in the main body case 2. A valve body 5 including a washer (support member) 4 and a flange 6 fixed to the valve body 5 are provided. A refrigerant pipe (not shown) connected to, for example, an evaporator and a compressor is connected to the valve body 5 and the flange 6 to form a refrigeration cycle. Here, as shown by the arrow indicating the flow of the refrigerant in FIG. 1, it is assumed that the right side of the pressure regulating valve 1 is the inlet side of the refrigerant and the left side is the outlet side of the refrigerant.

弁本体５の本体ケース２は、冷媒配管と接続される接続部２３と、接続部２３よりも内径が大きく且つ内周面に段差部２１が形成された円筒部２２とを有する。接続部２３の内部は、例えば冷媒配管を介して蒸発器から冷媒が流入する入口側流路２３ｂとされ、その入口側端部２３ａには軸線Ｌから離れる側へ向かうよう突設部２４が形成されている。接続部２３の突設部２４には冷媒配管を締結するための雌ねじ孔２４ａが、軸線Ｌと平行に形成されている。接続部２３の出口側端部２３ｃには、後述する弁部３１の弁座部３１ｃが着座／離間するようになっている弁座２５が形成される。 The main body case 2 of the valve main body 5 has a connecting portion 23 connected to the refrigerant pipe, and a cylindrical portion 22 having an inner diameter larger than that of the connecting portion 23 and having a stepped portion 21 formed on the inner peripheral surface. The inside of the connecting portion 23 is, for example, an inlet-side flow path 23b into which the refrigerant flows from the evaporator via the refrigerant pipe, and a projecting portion 24 is formed at the inlet-side end 23a so as to move away from the axis L. Has been done. A female screw hole 24a for fastening the refrigerant pipe is formed in the projecting portion 24 of the connecting portion 23 in parallel with the axis L. A valve seat 25 is formed at the outlet side end portion 23c of the connecting portion 23 so that the valve seat portion 31c of the valve portion 31, which will be described later, is seated / separated.

本体ケース２に収容される弁体３は、本体ケース２の接続部２３に摺動自在に嵌挿される弁部３１と、弁部３１の開弁圧力を調整するベローズアセンブリ３３とを有する。ベローズアセンブリ３３は、弁部３１に把持される金属製のプレート３５と、プレート３５を介して弁部３１に連結され且つ本体ケース２の円筒部２２内で伸縮自在に収容された金属製のベローズ３２と、ベローズ３２の設定荷重を調整する調整ねじ３４とを有する。 The valve body 3 housed in the main body case 2 has a valve portion 31 slidably fitted and inserted into the connecting portion 23 of the main body case 2, and a bellows assembly 33 for adjusting the valve opening pressure of the valve portion 31. The bellows assembly 33 has a metal plate 35 gripped by the valve portion 31 and a metal bellows connected to the valve portion 31 via the plate 35 and stretchably housed in the cylindrical portion 22 of the main body case 2. It has 32 and an adjusting screw 34 for adjusting the set load of the bellows 32.

弁部３１は冷媒圧力に応じて本体ケース２内で軸線Ｌに沿って移動し、入口側流路２３ｂから流入する冷媒の流量を調整する機能を有する。弁部３１は、内部に冷媒流路が形成され且つ本体ケース２の接続部２３の内径と略同一の外形を有する略円筒状の摺動部３１ａと、摺動部３１ａよりも大径であってその外縁部が接続部２３の弁座２５と着座／離間する弁座部３１ｃとを有する。摺動部３１ａの側部には、複数の欠損部３１ｂが周方向に略等間隔に形成され、欠損部３１ｂによって冷媒が通過する流路が確保される。また、弁座部３１ｃの略中心には貫通孔３１ｅが形成されると共に、弁座部３１ｃの出口側側面３１ｆの外縁には軸線Ｌに対して略対称な位置に複数の爪部３１ｄが形成される。また、貫通孔３１ｅと爪部３１ｄとの間には、前記爪部３１ｄよりも高さの低い凸部３１ｇが形成される。 The valve portion 31 has a function of moving along the axis L in the main body case 2 according to the refrigerant pressure and adjusting the flow rate of the refrigerant flowing in from the inlet side flow path 23b. The valve portion 31 has a substantially cylindrical sliding portion 31a having a refrigerant flow path formed therein and having an outer diameter substantially the same as the inner diameter of the connecting portion 23 of the main body case 2, and a diameter larger than that of the sliding portion 31a. The outer edge portion thereof has a valve seat 25 of the connecting portion 23 and a valve seat portion 31c that is seated / separated. A plurality of defective portions 31b are formed at substantially equal intervals in the circumferential direction on the side portion of the sliding portion 31a, and the defective portions 31b secure a flow path through which the refrigerant passes. Further, a through hole 31e is formed in the substantially center of the valve seat portion 31c, and a plurality of claw portions 31d are formed at positions substantially symmetrical with respect to the axis L on the outer edge of the outlet side side surface 31f of the valve seat portion 31c. Will be done. Further, a convex portion 31g having a height lower than that of the claw portion 31d is formed between the through hole 31e and the claw portion 31d.

ベローズ３２は、蛇腹状であって伸縮可能な側壁部３２ａと、側壁部３２ａの軸線Ｌ方向の入口側をふさぐ底板部３２ｂとを有しており、軸線Ｌ方向の出口側は開口している。ベローズ３２の底板部３２ｂは、略円板状の金属製のプレート３５と溶接接合される。このプレート３５が弁座部３１ｃの出口側側面３１ｆに設けられた爪部３１ｄと凸部３１ｇとで挟持されることで、ベローズ３２が弁部３１と連結される。また、ベローズ３２の出口側の開口端は、調整ねじ３４の入口側端部３４ａに設けられた拡径部３４ｂと溶接接合され、これによりベローズ３２の内部に密閉空間ＳＰが形成されている。密閉空間ＳＰ内には、窒素やヘリウム等の不活性ガスが封入されている。 The bellows 32 has a bellows-shaped and expandable side wall portion 32a and a bottom plate portion 32b that closes the entrance side of the side wall portion 32a in the axis L direction, and the outlet side in the axis L direction is open. .. The bottom plate portion 32b of the bellows 32 is welded and joined to a substantially disk-shaped metal plate 35. The bellows 32 is connected to the valve portion 31 by sandwiching the plate 35 between the claw portion 31d provided on the outlet side side surface 31f of the valve seat portion 31c and the convex portion 31g. Further, the opening end on the outlet side of the bellows 32 is welded and joined to the enlarged diameter portion 34b provided at the inlet side end portion 34a of the adjusting screw 34, whereby a closed space SP is formed inside the bellows 32. An inert gas such as nitrogen or helium is sealed in the closed space SP.

調整ねじ３４はベローズ３２の設定荷重を調整するもので、そのねじ部３４ｄの外周面に螺設された雄ねじ３４ｅが、後述するワッシャ４の内周面に螺設された雌ねじ４１ｅと螺合している。ワッシャ４は後述するようにして、本体ケース２に固定されているので、調整ねじ３４の端部の係合スリット３４ｇに不図示の工具を係合させて調整ねじ３４を回動させると、雌ねじ４１ｅに対してねじ部３４ｄが螺動することで調整ねじ３４が軸線Ｌ方向へ移動し、それによりベローズ３２の長さが変わるためベローズ３２の設定荷重が調整される。調整ねじ３４はワッシャ４と螺着され、ワッシャ４を介して本体ケース２内で支持される。調整ねじ３４の調整が完了した後、ロックナット３６を調整ねじ３４に螺合させることにより、雌ねじ４１ｅと調整ねじ３４との不用意な螺動を阻止することができる。 The adjusting screw 34 adjusts the set load of the bellows 32, and the male screw 34e screwed on the outer peripheral surface of the threaded portion 34d is screwed with the female screw 41e screwed on the inner peripheral surface of the washer 4, which will be described later. ing. Since the washer 4 is fixed to the main body case 2 as described later, when a tool (not shown) is engaged with the engaging slit 34g at the end of the adjusting screw 34 to rotate the adjusting screw 34, the female screw When the screw portion 34d is screwed with respect to 41e, the adjusting screw 34 moves in the axis L direction, whereby the length of the bellows 32 changes, so that the set load of the bellows 32 is adjusted. The adjusting screw 34 is screwed to the washer 4 and is supported in the main body case 2 via the washer 4. After the adjustment of the adjusting screw 34 is completed, the lock nut 36 is screwed into the adjusting screw 34 to prevent the female screw 41e and the adjusting screw 34 from being inadvertently screwed.

ベローズ３２の内部には、ステム３３１と、ガイド３３２と、コイルバネ３３３と、ベローズ押さえ３３４とが設けられている。ステム３３１、ガイド３３２およびコイルバネ３３３、ベローズ押さえ３３４は、金属部材で構成されている。 Inside the bellows 32, a stem 331, a guide 332, a coil spring 333, and a bellows retainer 334 are provided. The stem 331, the guide 332, the coil spring 333, and the bellows retainer 334 are made of metal members.

ステム３３１とガイド３３２は、弁部３１の軸線Ｌ方向の移動をガイドするガイド部材である。ステム３３１は、本体ケース２の軸線Ｌ方向に延びる軸部材である。弁部３１側のガイド３３２の端部開口から突出したステム３３１の入口端部は、ベローズ３２の底板部３２ｂを内側から押さえるベローズ押さえ３３４に固定されている。したがって、ステム３３１は、ベローズ押さえ３３４、ベローズ３２の底板部３２ｂを介して、弁部３１と連結されており、弁部３１と共に移動するようになっている。 The stem 331 and the guide 332 are guide members that guide the movement of the valve portion 31 in the axis L direction. The stem 331 is a shaft member extending in the L direction of the axis of the main body case 2. The inlet end of the stem 331 protruding from the end opening of the guide 332 on the valve portion 31 side is fixed to the bellows retainer 334 that presses the bottom plate portion 32b of the bellows 32 from the inside. Therefore, the stem 331 is connected to the valve portion 31 via the bellows retainer 334 and the bottom plate portion 32b of the bellows 32, and moves together with the valve portion 31.

ステム３３１の出口側部分は、円筒状の筒部材であるガイド３３２の内部に挿入されており、ガイド３３２の内部を摺動可能となっている。ガイド３３２の出口側端部は、調節ねじ３４の対向する拡径部３４ｂに嵌合保持されている。更に、ガイド３３２の出口側端部は、コイルバネ３３３により付勢されて調節ねじ３４に対して常に押圧されているので、拡径部３４ｂから分離することなく保持されている。 The outlet side portion of the stem 331 is inserted inside the guide 332, which is a cylindrical tubular member, and is slidable inside the guide 332. The outlet-side end of the guide 332 is fitted and held in the opposite diameter-expanded portion 34b of the adjusting screw 34. Further, the outlet side end of the guide 332 is urged by the coil spring 333 and constantly pressed against the adjusting screw 34, so that the guide 332 is held without being separated from the enlarged diameter portion 34b.

コイルバネ３３３は、ベローズ３２と同様に、弁部３１に対して冷媒通路を閉じる側への荷重を付与するものである。コイルバネ３３３の出口側端は、ガイド３３２の出口側端部に保持され、コイルばね３３３の入口側端は、ベローズ押さえ３３４に保持されている。 Similar to the bellows 32, the coil spring 333 applies a load to the valve portion 31 on the side that closes the refrigerant passage. The outlet-side end of the coil spring 333 is held by the outlet-side end of the guide 332, and the inlet-side end of the coil spring 333 is held by the bellows retainer 334.

次に、ワッシャ４について説明する。図２は、軸線Ｌ方向に見たワッシャ４の平面図であり、図３は、ワッシャ４の斜視図である。ワッシャ４の軸線をＸとする。ワッシャ４は、中央環状部（連結部）４１と、中央環状部４１から径方向外側へ向かって放射状に延びる複数（ここでは３本）の延出部４２とを有する。延出部４２の外方端は、周方向に延びて単一の環状となる外周部４３となっている。中央環状部４１の内周面には、調整ねじ３４のねじ部３４ｄに螺設された雄ねじ３４ｅと螺合される雌ねじ４１ｅが螺設されている。中央環状部４１と延出部４２の接続部は、軸線Ｘ方向に見て滑らかな円弧でつながっており、また延出部４２と外周部４３の接続部は、軸線Ｘ方向に見て滑らかな円弧でつながっている。 Next, the washer 4 will be described. FIG. 2 is a plan view of the washer 4 as viewed in the L direction of the axis, and FIG. 3 is a perspective view of the washer 4. Let X be the axis of the washer 4. The washer 4 has a central annular portion (connecting portion) 41 and a plurality of (here, three) extending portions 42 extending radially outward from the central annular portion 41. The outer end of the extending portion 42 is an outer peripheral portion 43 extending in the circumferential direction to form a single annular shape. On the inner peripheral surface of the central annular portion 41, a female screw 41e screwed with a male screw 34e screwed into the screw portion 34d of the adjusting screw 34 is screwed. The connecting portion between the central annular portion 41 and the extending portion 42 is connected by a smooth arc when viewed in the axis X direction, and the connecting portion between the extending portion 42 and the outer peripheral portion 43 is smooth when viewed in the axis X direction. They are connected by an arc.

延出部４２はそれぞれ周方向に略等間隔に配置され、中央環状部４１と延出部４２と外周部４３とで囲まれた３つの空間ＰＧによって冷媒流路が形成される。また、ワッシャ４の厚さは、内周面に螺設された雌ねじ４１ｅと調整ねじ３４のねじ部３４ｄの雄ねじ３４ｅ（図１）が十分長く螺合でき、例えば内部の冷媒流れや車両走行時の振動等に耐え得るように設計されている。ワッシャ４は、図１に示すように、調整ねじ３４によりベローズ３２の設定荷重が調整された後、ロックナット３６により調整ねじ３４に固定される。 The extension portions 42 are arranged at substantially equal intervals in the circumferential direction, and a refrigerant flow path is formed by three space PGs surrounded by the central annular portion 41, the extension portion 42, and the outer peripheral portion 43. Further, the thickness of the washer 4 can be such that the female screw 41e screwed on the inner peripheral surface and the male screw 34e (FIG. 1) of the screw portion 34d of the adjusting screw 34 can be screwed sufficiently long, for example, when the internal refrigerant flows or the vehicle is running. It is designed to withstand the vibration of. As shown in FIG. 1, the washer 4 is fixed to the adjusting screw 34 by the lock nut 36 after the set load of the bellows 32 is adjusted by the adjusting screw 34.

図１において、中空のフランジ６は、嵌合部６１と接続部６２とを有する。嵌合部６１の内周面６１ｃは、出口側へ向かって次第に縮径し、略一定の内径を有する接続部６２の内周面６２ａに接続している。嵌合部６１の外周面には環状溝部６１ｂが形成され、環状溝部６１ｂに円筒部２２の内周面と嵌合部６１の外周面との間を封止するシール部材としてのＯリング６３が装着される。 In FIG. 1, the hollow flange 6 has a fitting portion 61 and a connecting portion 62. The inner peripheral surface 61c of the fitting portion 61 gradually reduces in diameter toward the outlet side, and is connected to the inner peripheral surface 62a of the connecting portion 62 having a substantially constant inner diameter. An annular groove 61b is formed on the outer peripheral surface of the fitting portion 61, and the annular groove 61b is provided with an O-ring 63 as a sealing member that seals between the inner peripheral surface of the cylindrical portion 22 and the outer peripheral surface of the fitting portion 61. It will be installed.

接続部６２の内部は、例えば冷媒配管を介して圧縮器へ冷媒を流出する出口側流路とされ、軸線Ｌから離れる側へ向かうよう突設部６４が形成され、この突設部６４には冷媒配管を締結するための雌ねじ６４ａが軸線Ｌ方向に平行に形成される。 The inside of the connection portion 62 is, for example, an outlet side flow path through which the refrigerant flows out to the compressor via the refrigerant pipe, and a protrusion 64 is formed so as to move away from the axis L, and the protrusion 64 has a protrusion 64. A female screw 64a for fastening the refrigerant pipe is formed parallel to the axis L direction.

嵌合部６１の外周面には、本体ケース２の円筒部２２の出口側端部２２ａに対応する部分に環状の窪み６５が形成される。円筒部２２の出口側端部２２ａの複数の部位、具体的には出口側端部２２ａのうち、例えば周方向に等間隔に４箇所が窪み６５へ向かって押圧変形され、本体ケース２の円筒部２２とフランジ６の嵌合部６１とがカシメＣにより固定されているが、詳細は後述する。 An annular recess 65 is formed on the outer peripheral surface of the fitting portion 61 at a portion corresponding to the outlet side end portion 22a of the cylindrical portion 22 of the main body case 2. Of the plurality of portions of the outlet side end portion 22a of the cylindrical portion 22, specifically, four portions of the outlet side end portion 22a at equal intervals in the circumferential direction are pressed and deformed toward the recess 65, and the cylinder of the main body case 2 is formed. The portion 22 and the fitting portion 61 of the flange 6 are fixed by the caulking C, and the details will be described later.

円筒部２２を含む本体ケース２とフランジ６とワッシャ４は、同じ素材（ここではアルミ材）から形成されている。 The main body case 2, the flange 6, and the washer 4 including the cylindrical portion 22 are made of the same material (here, an aluminum material).

図４は、図１の矢印Ａ部を拡大して示す図であり、表面粗さを誇張して示している。ここで、嵌合部６１の入口側端部６１ａの表面粗さと、本体ケース２の円筒部２２の段差部２１の表面粗さと、入口側端部６１ａに当接するワッシャ４の外周部４３における第１面４３ａの表面粗さと、段差部２１に当接するワッシャ４の外周部４３における第２面４３ｂの表面粗さは、ほぼ等しい。具体的には、各表面粗さは、算術平均粗さで２０μｍ〜３０μｍであり、その差は１０μｍ以下であると好ましい。 FIG. 4 is an enlarged view of the arrow A portion of FIG. 1, and shows exaggerated surface roughness. Here, the surface roughness of the inlet side end portion 61a of the fitting portion 61, the surface roughness of the step portion 21 of the cylindrical portion 22 of the main body case 2, and the outer peripheral portion 43 of the washer 4 that abuts on the inlet side end portion 61a. The surface roughness of the first surface 43a and the surface roughness of the second surface 43b on the outer peripheral portion 43 of the washer 4 in contact with the step portion 21 are substantially equal. Specifically, each surface roughness has an arithmetic mean roughness of 20 μm to 30 μm, and the difference is preferably 10 μm or less.

＜圧力調整弁の作動＞
次に、上記する圧力調整弁１の作動を簡単に説明する。図１において、例えば弁本体５の本体ケース２に冷媒配管（不図示）を介して接続される蒸発器の冷媒圧力が、弁部３１を閉弁方向（図１で右方）に付勢するベローズ３２及びコイルバネ３３３の設定荷重よりも小さい場合、弁部３１の弁座部３１ｃが本体ケース２の接続部２３の弁座２５に着座し、圧力調整弁１を流れる冷媒流量が低減される。 <Operation of pressure control valve>
Next, the operation of the pressure adjusting valve 1 described above will be briefly described. In FIG. 1, for example, the refrigerant pressure of an evaporator connected to the main body case 2 of the valve main body 5 via a refrigerant pipe (not shown) urges the valve portion 31 in the valve closing direction (to the right in FIG. 1). When the load is smaller than the set load of the bellows 32 and the coil spring 333, the valve seat portion 31c of the valve portion 31 is seated on the valve seat 25 of the connection portion 23 of the main body case 2, and the flow rate of the refrigerant flowing through the pressure adjusting valve 1 is reduced.

また、例えば上記蒸発器の冷媒圧力が弁部３１を閉弁方向に付勢するベローズ３２及びコイルバネ３３３の設定荷重よりも大きい場合、弁部３１が開弁方向（図１で左方）へ移動し、弁部３１の弁座部３１ｃが本体ケース２の接続部２３の弁座２５から離れ、圧力調整弁１を流れる冷媒流量が増加される。 Further, for example, when the refrigerant pressure of the evaporator is larger than the set load of the bellows 32 and the coil spring 333 that urge the valve portion 31 in the valve closing direction, the valve portion 31 moves in the valve opening direction (left in FIG. 1). Then, the valve seat portion 31c of the valve portion 31 is separated from the valve seat 25 of the connection portion 23 of the main body case 2, and the flow rate of the refrigerant flowing through the pressure adjusting valve 1 is increased.

＜圧力調整弁の組立＞
次に、上記する圧力調整弁１の組み立て工程について説明する。圧力調整弁１を組み立てる場合、まず、ベローズ３２内にステム３３１と、ガイド３３２と、コイルバネ３３３とベローズ押さえ３３４を上述したように組み付けた上で、このベローズ３２にプレート３５及び調整ねじ３４を溶接接合してベローズアセンブリ３３を作製し、ベローズアセンブリ３３と弁部３１等を一体に組み付けて弁体３を作製する。次いで、弁体３の調整ねじ３４のねじ部３４ｄにワッシャ４を螺合させて所定位置に配置し、ロックナット３６によってワッシャ４を調整ねじ３４のねじ部３４ｄに固定する。次いで、新たにアセンブリとなった弁体３とワッシャ４とロックナット３６とを本体ケース２に挿入し、弁体３の弁部３１の摺動部３１ａを本体ケース２の接続部２３に嵌挿させると共に、ワッシャ４の外周部４３を本体ケース２の円筒部２２の段差部２１に当接させて配置する。 <Assembly of pressure control valve>
Next, the assembly process of the pressure regulating valve 1 described above will be described. When assembling the pressure adjusting valve 1, first, the stem 331, the guide 332, the coil spring 333, and the bellows retainer 334 are assembled in the bellows 32 as described above, and then the plate 35 and the adjusting screw 34 are welded to the bellows 32. The bellows assembly 33 is manufactured by joining, and the bellows assembly 33 and the valve portion 31 and the like are integrally assembled to manufacture the valve body 3. Next, the washer 4 is screwed into the threaded portion 34d of the adjusting screw 34 of the valve body 3 and placed at a predetermined position, and the washer 4 is fixed to the threaded portion 34d of the adjusting screw 34 by the lock nut 36. Next, the newly assembled valve body 3, washer 4, and lock nut 36 are inserted into the main body case 2, and the sliding portion 31a of the valve portion 31 of the valve body 3 is inserted into the connecting portion 23 of the main body case 2. At the same time, the outer peripheral portion 43 of the washer 4 is placed in contact with the stepped portion 21 of the cylindrical portion 22 of the main body case 2.

次いで、環状溝部６１ｂにＯリング６３を装着した状態で、本体ケース２の出口側端部２２ａから、フランジ６の嵌合部６１を本体ケース２の円筒部２２に嵌挿する。かかる状態における図１の矢印Ａ部を、図５に拡大して示す。図５に示すように、フランジ６と本体ケース２とが、ワッシャ４の外周部４３に単に接している状態では、外周部４３は変形しない。 Next, with the O-ring 63 mounted on the annular groove portion 61b, the fitting portion 61 of the flange 6 is fitted into the cylindrical portion 22 of the main body case 2 from the outlet side end portion 22a of the main body case 2. The arrow A portion of FIG. 1 in such a state is shown enlarged in FIG. As shown in FIG. 5, when the flange 6 and the main body case 2 are simply in contact with the outer peripheral portion 43 of the washer 4, the outer peripheral portion 43 is not deformed.

その後、本体ケース２とフランジ６とを、例えば不図示のプレス装置を用いて軸線Ｌ方向へ所定圧以上で押圧する。これにより、図６に示すように、嵌合部６１の入口側端部６１ａと、これに当接するワッシャ４の外周部４３における第１面４３ａは、それぞれ塑性変形をし、径方向に膨らむこととなる。また、円筒部２２の段差部２１に当接するワッシャ４の外周部４３における第２面４３ｂも塑性変形をし、径方向に膨らむこととなる。これにより、ワッシャ４の外周部４３の軸線Ｌ方向（図１）における中央部と，円筒部２２の内周面との間に隙間δが発生する。また、ワッシャ４の外周部４３の軸線Ｌ方向（図１）における端部と，円筒部２２の内周面とは接点Ｐで接する。 After that, the main body case 2 and the flange 6 are pressed with a predetermined pressure or more in the axis L direction using, for example, a pressing device (not shown). As a result, as shown in FIG. 6, the inlet side end portion 61a of the fitting portion 61 and the first surface 43a of the outer peripheral portion 43 of the washer 4 in contact with the fitting portion 61 are plastically deformed and bulge in the radial direction. It becomes. Further, the second surface 43b of the outer peripheral portion 43 of the washer 4 that abuts on the stepped portion 21 of the cylindrical portion 22 is also plastically deformed and bulges in the radial direction. As a result, a gap δ is generated between the central portion of the outer peripheral portion 43 of the washer 4 in the axis L direction (FIG. 1) and the inner peripheral surface of the cylindrical portion 22. Further, the end portion of the outer peripheral portion 43 of the washer 4 in the axis L direction (FIG. 1) and the inner peripheral surface of the cylindrical portion 22 are in contact with each other at a contact P.

ただし、本体ケース２とフランジ６とワッシャ４は、同じ素材から形成されているので、ワッシャ４の外周部４３における第１面４３ａに当接する嵌合部６１の入口側端部６１ａも、その第２面４３ｂに当接する円筒部２２の段差部２１も、ほぼ窪むことがない。換言すれば、強い圧力で本体ケース２とフランジ６とを押圧しても、段差部２１の軸線Ｌ方向における変形を抑制することができるため、ワッシャ４の軸線Ｘが、圧力調整弁１の軸線Ｌに対して傾くことを抑制できる。 However, since the main body case 2, the flange 6, and the washer 4 are made of the same material, the inlet side end portion 61a of the fitting portion 61 that abuts on the first surface 43a of the outer peripheral portion 43 of the washer 4 is also the first. The stepped portion 21 of the cylindrical portion 22 that abuts on the two surfaces 43b is also substantially not dented. In other words, even if the main body case 2 and the flange 6 are pressed with a strong pressure, the deformation of the step portion 21 in the axis L direction can be suppressed, so that the axis X of the washer 4 is the axis of the pressure adjusting valve 1. It is possible to suppress tilting with respect to L.

更に、本体ケース２とフランジ６とを軸線Ｌ方向へ所定圧以上で押圧した状態を維持しつつ、円筒部２２の出口側端部２２ａの複数の箇所を、嵌合部６１の外周面に形成された窪み６５へ向かって径方向内側に押圧し、本体ケース２の円筒部２２とフランジ６の嵌合部６１とをカシメＣにより固定する。以上で圧力調整弁１の組み立てが完了する。 Further, while maintaining a state in which the main body case 2 and the flange 6 are pressed in the axial direction L direction at a predetermined pressure or higher, a plurality of portions of the outlet side end portion 22a of the cylindrical portion 22 are formed on the outer peripheral surface of the fitting portion 61. It is pressed inward in the radial direction toward the recess 65, and the cylindrical portion 22 of the main body case 2 and the fitting portion 61 of the flange 6 are fixed by caulking C. This completes the assembly of the pressure regulating valve 1.

本実施形態によれば、嵌合部６１の入口側端部６１ａの表面粗さと、本体ケース２の円筒部２２の段差部２１の表面粗さと、入口側端部６１ａに当接するワッシャ４の外周部４３における第１面４３ａの表面粗さと、段差部２１に当接するワッシャ４の外周部４３における第２面４３ｂの表面粗さが、機械加工されたままの状態でありほぼ等しい。よって、軸線Ｌ方向に強い押圧力を付与することで、入口側端部６１ａと第１面４３ａとが密接した状態で強く係合し合い、また段差部２１と第２面４３ｂとが強く密接した状態で係合し合うので、これに起因した摩擦力（及びリンギング現象）により本体ケース２に対してワッシャ４が相対回転することを阻止することができる。 According to the present embodiment, the surface roughness of the inlet side end portion 61a of the fitting portion 61, the surface roughness of the step portion 21 of the cylindrical portion 22 of the main body case 2, and the outer circumference of the washer 4 that abuts on the inlet side end portion 61a. The surface roughness of the first surface 43a of the portion 43 and the surface roughness of the second surface 43b of the outer peripheral portion 43 of the washer 4 in contact with the step portion 21 are substantially equal to each other as they are machined. Therefore, by applying a strong pressing force in the axis L direction, the inlet side end portion 61a and the first surface 43a are strongly engaged with each other in a close contact state, and the step portion 21 and the second surface 43b are strongly and closely engaged with each other. Since they engage with each other in this state, it is possible to prevent the washer 4 from rotating relative to the main body case 2 due to the frictional force (and ringing phenomenon) caused by this.

また、ワッシャ４は環状の外周部４３を有するので、入口側端部６１ａと段差部２１とに対して全周で当接し、すなわち外周部４３のない延出部４２の外方端を当接させる場合に比して当接面積が大幅に増大するため、本体ケース２に対してワッシャ４が相対回転することをさらに効果的に阻止することができる。また環状の外周部４３を設けることで、略同径の段差部２１に対して偏心が抑えられるため、ワッシャ４の本体ケース２に対する同軸度を向上させて、ベローズアセンブリ３３のスムーズな動作を確保することもできる。 Further, since the washer 4 has an annular outer peripheral portion 43, it abuts against the inlet side end portion 61a and the step portion 21 on the entire circumference, that is, abuts on the outer end of the extension portion 42 without the outer peripheral portion 43. Since the contact area is significantly increased as compared with the case where the washer 4 is allowed to rotate, it is possible to more effectively prevent the washer 4 from rotating relative to the main body case 2. Further, since the eccentricity is suppressed with respect to the stepped portion 21 having substantially the same diameter by providing the annular outer peripheral portion 43, the coaxiality of the washer 4 with respect to the main body case 2 is improved, and the smooth operation of the bellows assembly 33 is ensured. You can also do it.

［変形例］
本発明に係るワッシャの変形例を図７に示す。 [Modification example]
A modified example of the washer according to the present invention is shown in FIG.

図７におけるワッシャ４Ａは、中央環状部４１と、中央環状部４１から径方向外側へ向かって放射状に延びる延出部４２と、各延出部４２の外方端から周方向両側に延びる外周部４３Ａとを有する。各外周部４３Ａは、同軸の環の一部であってよい。各延出部４２から延びる長さは、両側で均等でなくてよく、また延出部４２毎に異なっていてもよい。それ以外の構成については、同じ符号を付して重複する説明を省略する。 The washer 4A in FIG. 7 has a central annular portion 41, an extension portion 42 extending radially outward from the central annular portion 41, and an outer peripheral portion extending from the outer end of each extension portion 42 to both sides in the circumferential direction. It has 43A and. Each outer peripheral portion 43A may be a part of a coaxial ring. The length extending from each extension 42 does not have to be uniform on both sides, and may be different for each extension 42. For other configurations, the same reference numerals are given and duplicate description is omitted.

なお、本発明は、上述の実施形態に限定されない。本発明の範囲内において、上述の実施形態の任意の構成要素の変形が可能である。また、上述の実施形態において任意の構成要素の追加または省略が可能である。 The present invention is not limited to the above-described embodiment. Within the scope of the present invention, any component of the above-described embodiment can be modified. In addition, any component can be added or omitted in the above-described embodiment.

１ 圧力調整弁
２ 本体ケース
３ 弁体
４ ワッシャ（支持部材）
５ 弁本体
６ フランジ
２１ 段差部
２２ 円筒部
２３ 接続部
２４ 突設部
２５ 弁座
３１ 弁部
３２ ベローズ
３３ ベローズアセンブリ
３４ 調整ねじ
３５ プレート
４１ 中央環状部
４２ 延出部
４３ 外周部
６１ 嵌合部
６２ 接続部
６３ Ｏリング
６４ 突設部
Ｌ 軸線

1 Pressure control valve 2 Main body case 3 Valve body 4 Washer (support member)
5 Valve body 6 Flange 21 Stepped portion 22 Cylindrical portion 23 Connecting portion 24 Protruding portion 25 Valve seat 31 Valve portion 32 Bellows 33 Bellows assembly 34 Adjusting screw 35 Plate 41 Central annular portion 42 Extension portion 43 Outer peripheral portion 61 Fitting portion 62 Connection part 63 O-ring 64 Protruding part L axis

Claims (4)

内周面に段差部が形成された円筒部を有する本体ケースと、前記本体ケース内に収容される弁体と、前記本体ケースの前記段差部に当接配置され、前記弁体を前記本体ケース内で支持する支持部材と、を有する弁本体と、
前記本体ケースの前記円筒部に嵌合される嵌合部を有するフランジと、を備え、
前記支持部材は、前記弁体に連結される連結部と、前記連結部から径方向外方に延在する延出部と、を有し、
前記支持部材の延出部が、前記円筒部の段差部と、前記円筒部に嵌合した前記嵌合部との間で塑性変形するように押圧された状態で、前記円筒部の端部が前記嵌合部に対してカシメにより固定されており、
前記円筒部と、前記フランジと、前記支持部材は同じ原料から形成されている、
ことを特徴とする弁装置。 The main body case having a cylindrical portion having a stepped portion formed on the inner peripheral surface, the valve body housed in the main body case, and the valve body are arranged in contact with the stepped portion of the main body case, and the valve body is placed in the main body case. A valve body having a support member to support inside,
A flange having a fitting portion to be fitted to the cylindrical portion of the main body case.
The support member has a connecting portion connected to the valve body and an extending portion extending radially outward from the connecting portion.
In a state where the extending portion of the support member is pressed so as to be plastically deformed between the stepped portion of the cylindrical portion and the fitting portion fitted to the cylindrical portion, the end portion of the cylindrical portion is pressed. It is fixed to the fitting portion by caulking and
The cylindrical portion, the flange, and the support member are formed of the same raw material .
A valve device characterized by that. 前記延出部は、その外方端から周方向に延在する外周部を有し、前記外周部が前記円筒部の段差部と、前記嵌合部との間で挟持される、
ことを特徴とする請求項１に記載の弁装置。 The extending portion has an outer peripheral portion extending in the circumferential direction from the outer end thereof, and the outer peripheral portion is sandwiched between the stepped portion of the cylindrical portion and the fitting portion.
The valve device according to claim 1. 前記外周部は、周方向に連続した環状をなしている、
ことを特徴とする請求項２に記載の弁装置。 The outer peripheral portion has a continuous annular shape in the circumferential direction.
The valve device according to claim 2. 前記円筒部の端部が前記嵌合部に対してカシメにより固定された状態で、前記外周部の軸線方向中央部は、前記円筒部に対して隙間を有し、前記外周部の軸線方向端部は、前記円筒部に接する、
ことを特徴とする請求項２または３に記載の弁装置。 In a state where the end portion of the cylindrical portion is fixed to the fitting portion by caulking, the axial central portion of the outer peripheral portion has a gap with respect to the cylindrical portion, and the axial end portion of the outer peripheral portion has a gap. The portion is in contact with the cylindrical portion.
The valve device according to claim 2 or 3.
JP2018211483A 2018-11-09 2018-11-09 Valve device Active JP6831116B2 (en)

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