JP2001012825A - Throttle device - Google Patents
Throttle deviceInfo
- Publication number
- JP2001012825A JP2001012825A JP11183419A JP18341999A JP2001012825A JP 2001012825 A JP2001012825 A JP 2001012825A JP 11183419 A JP11183419 A JP 11183419A JP 18341999 A JP18341999 A JP 18341999A JP 2001012825 A JP2001012825 A JP 2001012825A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- port
- diameter
- throttle
- valve seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Details Of Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、流体が通過する流
体回路中に介設される絞り装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle device provided in a fluid circuit through which a fluid passes.
【0002】[0002]
【従来の技術】例えば、空気調和機の冷凍サイクルに設
けられた絞り装置においては、冷媒の流動により騒音が
発生することがあるため、かかる冷媒流動音を低減する
ための手段が従来から種々提案されている。2. Description of the Related Art For example, in a throttling device provided in a refrigeration cycle of an air conditioner, noise may be generated due to the flow of the refrigerant, and various means for reducing the flow noise of the refrigerant have conventionally been proposed. Have been.
【0003】その一例として、特開平7−248162
号公報に記載の電磁弁では、ソレノイドコイルの通電及
びその停止によりプランジャと共に軸方向に往復移動す
る弁棒に、その軸心を通る流通孔を貫設し、この電磁弁
を絞りとして使用するときには、ソレノイドコイルに通
電して弁棒を移動させることにより、弁棒の一端に形成
された弁体で弁を閉じさせ、2次側配管の開口を閉塞さ
せている。As one example, Japanese Patent Application Laid-Open No. 7-248162
In the solenoid valve described in Japanese Patent Application Laid-Open Publication No. H11-115, when a solenoid rod is energized and stopped, a valve rod that reciprocates in the axial direction together with the plunger is provided with a through hole passing through the axis thereof, and when this solenoid valve is used as a throttle, By energizing the solenoid coil to move the valve stem, the valve is closed by a valve element formed at one end of the valve stem, and the opening of the secondary pipe is closed.
【0004】そして、弁体が弁を閉じた状態で、1次側
配管からプランジャの外側の間隙を経て弁棒の他端側に
至り、さらに、流通孔を経て弁棒の一端側から2次側配
管に至る漏洩通路を形成させ、この漏洩通路を通過する
冷媒を、漏洩通路内において複数回に分けて減圧するこ
とで、電磁弁を絞りとして使用する際の冷媒通過音の低
減を図っている。Then, in a state where the valve element is closed, the valve extends from the primary side pipe to the other end of the valve rod through a gap outside the plunger, and further passes through a flow hole from the one end of the valve rod to the secondary side. By forming a leakage passage leading to the side pipe, the refrigerant passing through the leakage passage is decompressed a plurality of times in the leakage passage, thereby reducing the refrigerant passage noise when using the solenoid valve as a throttle. I have.
【0005】また、他の従来例として、特開平8−93
945号公報に記載の電動流量制御弁では、円筒状ブッ
シュ内にねじ結合された弁ホルダに弁体を連結し、ステ
ッピングモータの作動により弁体を弁ホルダごと、円筒
状ブッシュに対して周方向に回転させつつ軸方向に往復
移動させる、即ち、螺旋動作させることで、弁を弁体に
より開閉させ、弁体により弁を閉じると、2次側配管の
開口が閉塞されるように構成されている。Another conventional example is disclosed in Japanese Patent Laid-Open No. 8-93.
In the electric flow control valve described in Japanese Patent No. 945, a valve body is connected to a valve holder screwed into a cylindrical bush, and the valve body is moved in a circumferential direction with respect to the cylindrical bush by operating a stepping motor. By reciprocating in the axial direction while rotating, that is, by spiraling, the valve is opened and closed by the valve body, and when the valve is closed by the valve body, the opening of the secondary side pipe is configured to be closed. I have.
【0006】そして、1次側配管からこの電動流量制御
弁に、ガス冷媒と液冷媒とが混合した気液混合冷媒が流
入する場合には、弁体により弁を全閉直前の状態とし、
この弁の弁座と弁体との僅かな間隙である弁絞り部を介
して液冷媒を1次側配管から2次側配管に流入させると
共に、ガス冷媒を、1次側配管に連通するように弁体か
ら弁ホルダに亘って形成された内部通路を介して1次側
配管から2次側配管に流入させ、弁絞り部にガス冷媒を
通過させないようにすることで、気泡ガスの発生及びそ
の破裂による騒音発生の防止を図っている。When a gas-liquid mixed refrigerant in which a gas refrigerant and a liquid refrigerant are mixed flows into the electric flow control valve from the primary side pipe, the valve is brought into a state immediately before the valve is completely closed by a valve body.
The liquid refrigerant is caused to flow from the primary pipe to the secondary pipe through a valve constriction portion, which is a slight gap between the valve seat of the valve and the valve body, and the gas refrigerant is communicated with the primary pipe. By flowing the gas refrigerant from the primary pipe to the secondary pipe through an internal passage formed from the valve element to the valve holder, and preventing the gas refrigerant from passing through the valve constriction, generation of bubble gas and Noise is prevented from being generated due to the rupture.
【0007】さらに他の従来例として、特開平5−28
8286号公報に記載の膨張弁では、ステッピングモー
タのステータに連結された弁棒に固定の送りねじをねじ
結合させ、ステッピングモータの作動により弁棒を送り
ねじに対して周方向に回転させつつ軸方向に往復移動さ
せる、即ち、螺旋動作させることで、弁棒の先端の弁体
により弁を開閉させ、弁体により弁を閉じると、2次側
配管の開口が閉塞されるように構成されている。As another conventional example, Japanese Patent Application Laid-Open No. 5-28
In the expansion valve described in Japanese Patent No. 8286, a fixed feed screw is screw-coupled to a valve stem connected to a stator of a stepping motor, and the valve stem is rotated in the circumferential direction with respect to the feed screw by the operation of the stepping motor. Reciprocating in the direction, that is, by helical operation, the valve is opened and closed by the valve element at the tip of the valve rod, and when the valve is closed by the valve element, the opening of the secondary side pipe is configured to be closed. I have.
【0008】そして、弁棒の弁体部分周面に、弁棒の軸
方向に延在する溝を、弁棒の周方向に間隔をおいた箇所
に複数形成し、或は、この溝と合わせて、弁棒の弁体部
分に、弁棒先端と弁体部分周面とを連通させる内部通路
を形成し、弁体により弁を閉じた状態で、弁座の内周壁
と溝との間隙、或は、この間隙と弁棒の内部通路とによ
り、1次側配管と2次側配管とを低流量で連通させる複
数の流路を確保させている。[0008] A plurality of grooves extending in the axial direction of the valve stem are formed on the peripheral surface of the valve element portion of the valve stem at locations spaced apart in the circumferential direction of the valve stem. In the valve body portion of the valve stem, an internal passage communicating the valve stem tip and the peripheral surface of the valve body portion is formed, and in a state where the valve is closed by the valve body, the gap between the inner peripheral wall of the valve seat and the groove, Alternatively, the gap and the internal passage of the valve stem secure a plurality of flow paths for communicating the primary pipe and the secondary pipe at a low flow rate.
【0009】これにより、特開平5−288286号公
報に記載の膨張弁では、特に、冷媒がガス冷媒と液冷媒
との混合した気液混合冷媒である場合に、ガス冷媒の流
路と液冷媒の流路とを個別に確保することができ、これ
により、気泡ガスの発生及びその破裂による騒音発生
や、気泡塊による絞りの閉塞の発生を防止することがで
きる。Thus, in the expansion valve described in Japanese Patent Application Laid-Open No. 5-288286, especially when the refrigerant is a gas-liquid mixed refrigerant in which a gas refrigerant and a liquid refrigerant are mixed, the flow path of the gas refrigerant and the liquid refrigerant Can be secured separately, thereby making it possible to prevent generation of noise due to generation and rupture of bubble gas and generation of blockage of a throttle by a bubble mass.
【0010】さらにまた他の従来例として、実開昭61
−54164公報に記載の膨張弁では、ソレノイドコイ
ルの通電及びその停止により、2次側配管の開口に連な
る弁を、プランジャにより構成された弁体によって開閉
すると共に、この弁の弁座に、2次側配管の開口から1
次側配管の開口に至る溝を形成して、弁体により弁を閉
じた状態で、弁座の溝により1次側配管から2次側配管
に向けて流れる冷媒が絞られるように構成されている。Further, as another conventional example, Japanese Utility Model Application Laid-Open No.
In the expansion valve described in JP-A-54164, the valve connected to the opening of the secondary pipe is opened and closed by a valve body constituted by a plunger by energizing and stopping the solenoid coil, and a valve seat of the valve is provided with a valve seat. 1 from the opening of the secondary pipe
A groove reaching the opening of the secondary pipe is formed, and in a state where the valve is closed by the valve body, the refrigerant flowing from the primary pipe to the secondary pipe is restricted by the groove of the valve seat. I have.
【0011】[0011]
【発明が解決しようとする課題】ところが、まず、特開
平7−248162号公報に記載の電磁弁や、特開平8
−93945号公報に記載の電動流量制御弁には、以下
のような問題がある。However, first, a solenoid valve described in JP-A-7-248162 and a solenoid valve disclosed in JP-A-8-248162 are disclosed.
The motor-operated flow control valve described in JP-93945 has the following problems.
【0012】即ち、絞り弁を構成する上で大きな絞り量
を得るには、絞り部の流体抵抗を大きくすればよく、こ
れを特開平7−248162号公報に記載の電磁弁に適
用すれば、漏洩通路の断面積を小さくするか、漏洩通路
の通路長さを長くすることになり、一方、特開平8−9
3945号公報に記載の電動流量制御弁に適用すれば、
弁体と弁座との僅かな間隙で形成される液冷媒の絞り通
路や、ガス冷媒をバイパスする内部通路の断面積を各々
小さくすることになる。That is, in order to obtain a large throttle amount in configuring the throttle valve, it is sufficient to increase the fluid resistance of the throttle portion. If this is applied to the solenoid valve described in Japanese Patent Application Laid-Open No. 7-248162, Either the cross-sectional area of the leak passage is reduced or the length of the leak passage is lengthened.
If applied to the electric flow control valve described in 3945,
The cross-sectional areas of the throttle passage for the liquid refrigerant formed by the slight gap between the valve body and the valve seat and the internal passage for bypassing the gas refrigerant are reduced.
【0013】ところが、特開平7−248162号公報
に記載の電磁弁の漏洩通路にしろ、特開平8−9394
5号公報に記載の電動流量制御弁の絞り通路や内部通路
にしろ、1次側配管や2次側配管に比べると通路の断面
積が元々かなり小さい。However, the leakage path of the solenoid valve described in Japanese Patent Application Laid-Open No. 7-248162,
Regardless of the throttle passage or the internal passage of the electric flow control valve described in JP-A-5, the cross-sectional area of the passage is considerably smaller than that of the primary pipe or the secondary pipe.
【0014】そのため、元々断面積の小さいこれらの通
路をその上さらに小さい断面積にするとなると、冷凍サ
イクル内を循環する冷媒中に存在するゴミ等の付着堆積
や、付着堆積したゴミ等による通路の閉塞を招きやす
く、その結果、絞り機能が損なわれたり冷凍サイクル内
で冷媒が循環不良を起こす等の弊害を発生する恐れがあ
る上、通路径の極小化により笛吹き音や変動音が発生し
たり、冷媒の流速が増して連続流動音の騒音レベル増加
を招く恐れもあるので、安易にそのような構成を採用す
るわけには行かない。For this reason, if these passages having originally small cross-sectional areas are further reduced in cross-sectional area, adhesion and accumulation of dust and the like existing in the refrigerant circulating in the refrigeration cycle, and formation of the passages due to the adhesion and accumulation of dust and the like will occur. Blockage is likely to occur, resulting in adverse effects such as impaired throttling function and poor circulation of the refrigerant in the refrigeration cycle.In addition, whistling noise and fluctuation noise are generated by minimizing the passage diameter. In addition, the flow rate of the refrigerant may increase and the noise level of the continuous flow noise may increase, so that such a configuration cannot be easily adopted.
【0015】しかも、上述した特開平7−248162
号公報に記載の電磁弁や、特開平8−93945号公報
に記載の電動流量制御弁のような、気液混合冷媒を絞る
弁においては、主として圧縮性流体であるガスと非圧縮
性流体である液とが、絞り用の狭い通路を互いに異なる
流動抵抗で交互に通過するため、冷媒に流量変動や圧力
変動が生じて弁に加振力として作用し、その結果、不連
続流動音が生じることが知られているが、その上で絞り
用の通路の断面積を小さくすると、上述したプロセスで
生じる不連続流動音の騒音レベル増加を招く恐れが多分
にある。In addition, the above-mentioned Japanese Patent Application Laid-Open No. 7-248162
In a valve for restricting a gas-liquid mixed refrigerant, such as an electromagnetic valve described in Japanese Patent Application Laid-Open Publication No. H8-209 and an electric flow control valve described in Japanese Patent Application Laid-Open No. Hei 8-93945, a gas that is a compressible fluid and a non-compressible fluid Since a certain liquid alternately passes through a narrow passage for throttling with different flow resistances, flow fluctuations and pressure fluctuations occur in the refrigerant and act as a vibrating force on the valve, resulting in discontinuous flow noise. However, if the cross-sectional area of the throttling passage is reduced, there is a possibility that the noise level of the discontinuous flow noise generated in the above-described process may be increased.
【0016】そして、気液混合冷媒が特に、砲弾形気泡
と液が交互に現れるスラグ流やプラグ流であると、流動
音が間欠的となり、しかも、その騒音レベルが元々非常
に大きいので、そのようなスラグ流やプラグ流の気液混
合冷媒を絞る絞り弁において、上述したように絞り用の
通路の断面積を小さくすると、不連続流動音の騒音レベ
ルが増加する度合いは、生半可なものでは済まなくな
る。If the gas-liquid mixed refrigerant is a slug flow or a plug flow in which shell-shaped bubbles and liquid alternately appear, the flow noise is intermittent and the noise level is originally very large. In a throttle valve that throttles a gas-liquid mixed refrigerant of such a slag flow or a plug flow, when the cross-sectional area of the throttle passage is reduced as described above, the degree of increase in the noise level of the discontinuous flow noise is not half-life. It will not stop.
【0017】次に、特開平5−288286号公報に記
載の膨張弁には、以下のような問題がある。Next, the expansion valve described in JP-A-5-288286 has the following problems.
【0018】即ち、この膨張弁では、弁棒の軸方向に延
在する溝を弁棒の周方向に間隔をおいて複数形成してい
ることから、特開平7−248162号公報に記載の電
磁弁や特開平8−93945号公報に記載の電動流量制
御弁のように、絞り用の通路が単一である構造に比べれ
ば、上述した騒音の問題は多少なりとも緩和される。That is, in this expansion valve, since a plurality of grooves extending in the axial direction of the valve stem are formed at intervals in the circumferential direction of the valve stem, the electromagnetic valve described in JP-A-7-248162 is disclosed. The noise problem described above is somewhat alleviated as compared with a valve and a structure having a single throttle passage, such as an electric flow control valve described in JP-A-8-93945.
【0019】しかし、冷凍サイクル内を循環する冷媒中
に存在するゴミ等の付着堆積や、付着堆積したゴミ等に
よる通路の閉塞の問題については、弁棒の各溝と弁座の
内周壁との間隙により構成される流路の断面積が小さく
なれば、各流路において当然発生するおそれがあり、根
本的な解決には至らない。However, with respect to the problem of adhesion and accumulation of dust and the like present in the refrigerant circulating in the refrigeration cycle and the obstruction of the passage due to the adhesion and accumulation of dust and the like, each groove of the valve stem and the inner peripheral wall of the valve seat are not covered. If the cross-sectional area of the flow path constituted by the gap becomes small, there is a possibility that the flow path may naturally occur in each flow path, and the fundamental solution cannot be achieved.
【0020】しかも、開弁時における弁体乃至弁棒の弁
座に対する移動が、弁棒の軸心を中心とする回転と弁棒
の軸方向動とを合成した螺旋動作であり、この回転及び
軸方向動のいずれも、弁棒の各溝と弁座の内周壁との間
隙を増加させる方向への移動ではないことから、弁棒の
各溝と弁座の内周壁との間隙により構成される各流路の
断面積をあまり小さくすると、冷凍サイクル内を循環す
る冷媒中に存在するゴミ等が各流路に詰まって、開弁の
際に弁棒が弁座に対して動けなくなってロックする可能
性がある。In addition, the movement of the valve body or the valve stem with respect to the valve seat at the time of opening the valve is a helical operation that combines rotation around the axis of the valve stem and axial movement of the valve stem. Since any of the axial movements is not a movement in the direction of increasing the gap between each groove of the valve stem and the inner peripheral wall of the valve seat, it is constituted by the gap between each groove of the valve stem and the inner peripheral wall of the valve seat. If the cross-sectional area of each flow path is too small, dust and the like present in the refrigerant circulating in the refrigeration cycle will be clogged in each flow path, and the valve stem will not move with respect to the valve seat when the valve is opened, causing a lock. there's a possibility that.
【0021】この弁棒のロックは、特開平5−2882
86号公報に記載されているように、弁棒の溝の底面が
弁座の内周壁と平行であろうが、弁座の内周壁に対して
傾斜したテーパ状であろうが、いずれも発生する可能性
がある。The lock of the valve stem is disclosed in Japanese Patent Laid-Open No. 5-2882.
As described in Japanese Patent Publication No. 86, the bottom surface of the groove of the valve stem may be parallel to the inner peripheral wall of the valve seat, or may be tapered inclined with respect to the inner peripheral wall of the valve seat. there's a possibility that.
【0022】また、特開平5−288286号公報に記
載の膨張弁では、上述したとおり、開弁時における弁体
乃至弁棒の弁座に対する移動が螺旋動作であることか
ら、開弁動作中に、弁棒の各溝と弁座の内周壁との間隙
により構成される各流路の弁座に対する相対位置が、弁
棒の回転方向において常時変化し、その結果、各流路の
弁座に対する相対位置の変化が各流路を通過する冷媒に
流量の微妙な変化を生じさせることになる。In the expansion valve described in Japanese Patent Application Laid-Open No. 5-288286, as described above, the movement of the valve body or the valve stem with respect to the valve seat at the time of opening is a spiral operation. The relative position of each flow path formed by the gap between each groove of the valve stem and the inner peripheral wall of the valve seat with respect to the valve seat constantly changes in the rotation direction of the valve stem. A change in the relative position causes a subtle change in the flow rate of the refrigerant passing through each flow path.
【0023】そのため、各流路におけるこの冷媒流量の
変化が、冷媒が弁棒に及ぼす流体力のバランスを変化さ
せて弁棒を振動させてしまい、この弁棒の振動により冷
媒の流動音の周波数や大きさが一定せず、耳に付く騒音
となってしまう。Therefore, the change in the flow rate of the refrigerant in each flow path changes the balance of the fluid force exerted by the refrigerant on the valve stem, causing the valve stem to vibrate. The size and size are not constant, resulting in noise that can be heard.
【0024】次に、実開昭61−54164公報に記載
の膨張弁には、以下のような問題がある。Next, the expansion valve described in Japanese Utility Model Laid-Open Publication No. 61-54164 has the following problems.
【0025】即ち、この膨張弁においても、弁座の溝に
より冷媒を絞ることから、大きな絞り量を得るためにこ
の溝の断面積をあまり小さくすると、上述した従来の他
の弁と同様に、冷凍サイクル内を循環する冷媒中に存在
するゴミ等の付着堆積や、付着堆積したゴミ等による通
路の閉塞を招きやすく、絞り機能が損なわれたり冷凍サ
イクル内で冷媒が循環不良を起こす等の弊害を発生する
恐れがある。That is, also in this expansion valve, since the refrigerant is throttled by the groove of the valve seat, if the cross-sectional area of this groove is made too small in order to obtain a large throttle amount, as in the other conventional valves described above, Adhesion and accumulation of dust and the like present in the refrigerant circulating in the refrigeration cycle and blockage of the passageway due to the adhering and debris are likely to occur, resulting in adverse effects such as impairment of the throttling function and poor circulation of the refrigerant in the refrigeration cycle. May occur.
【0026】しかも、この膨張弁の場合には、実開昭6
1−54164公報に記載されているとおり、1次側配
管の開口部よりも弁座の溝の底面の方が1段高いため、
1次側配管から弁を通過して2次側配管に流入する冷媒
が、両者の段差を越える際に弁座の溝よりもかなり高い
箇所を通過する可能性があり、したがって、開弁時の冷
媒の流勢によって溝に付着堆積したゴミ等を剥離させる
効果を殆ど期待することができず、そのままゴミ等が溝
に堆積し続けて溝を埋めてしまうおそれさえある。In addition, in the case of this expansion valve, the actual opening
As described in Japanese Patent Application Publication No. 1-54164, the bottom of the groove of the valve seat is one step higher than the opening of the primary pipe,
Refrigerant flowing from the primary pipe through the valve into the secondary pipe may pass through a location considerably higher than the groove of the valve seat when crossing the level difference between the two, and therefore, when the valve is opened. It is hardly expected to remove the dust and the like adhering to the groove due to the flow of the refrigerant, and there is a possibility that the dust and the like continue to accumulate in the groove and fill the groove.
【0027】また、この膨張弁では溝が単一であること
から、上述した冷媒の流動音の騒音レベルの問題はかな
り顕著に発生する可能性がある。In addition, since the expansion valve has a single groove, the above-described problem of the noise level of the flow noise of the refrigerant may occur quite significantly.
【0028】その上、この膨張弁では、単一の溝が弁棒
の径方向に延在しており、1次側配管から溝に流入しこ
の溝の通過により絞られた冷媒が、閉弁状態の弁棒の周
面に衝突することで、弁棒の軸方向に延在する2次側配
管の方に流れの向きを変えることから、流れの向きが変
わる際に冷媒の流れに大きな乱れが発生し、また、弁棒
の周面に衝突する際に弁棒に偏った方向から振動が加わ
ることになるため、これらが要因となって、冷媒の流動
音の騒音レベルが一層増してしまう恐れがある。In addition, in this expansion valve, a single groove extends in the radial direction of the valve rod, and the refrigerant that flows into the groove from the primary side pipe and is throttled by passing through this groove closes the valve. By colliding with the peripheral surface of the valve stem in the state, the flow direction is changed toward the secondary pipe extending in the axial direction of the valve shaft, so that when the flow direction changes, the refrigerant flow is greatly disturbed. Is generated, and vibration is applied from a direction deviated to the valve stem when colliding with the peripheral surface of the valve stem. As a result, these factors cause the noise level of the flow noise of the refrigerant to further increase. There is fear.
【0029】尚、上述した従来の各弁における通路、流
路、溝の閉塞の問題は、冷凍サイクル内を循環する冷媒
中に存在するゴミ等だけに起因して発生するものではな
く、仮に、HFC系の冷媒を使用した場合には、冷媒中
のコンタミ(汚物)等の付着堆積によっても発生する可
能性がある。Incidentally, the above-mentioned problem of blockage of the passage, flow path and groove in each conventional valve is not caused solely by dust or the like present in the refrigerant circulating in the refrigeration cycle. When an HFC-based refrigerant is used, there is a possibility that contamination (dirt) or the like in the refrigerant is caused by adhesion and deposition.
【0030】本発明は前記事情に鑑みなされたもので、
本発明の目的は、絞り量が大きく、かつ、騒音レベルの
低い絞り装置を提供することにある。The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a diaphragm device having a large diaphragm amount and a low noise level.
【0031】[0031]
【問題を解決するための手段】上記目的を達成するため
請求項1に記載した本発明の絞り装置は、第1の通路に
連通する弁室内に設けた弁棒が、前記弁室と第2の通路
との間に介在された弁ポートの弁座に接触離間する絞り
装置において、前記弁棒と前記弁座とのうちいずれか一
方に形成された溝により、前記弁座と該弁座に接触した
前記弁棒との間に第1の間隙を形成すると共に、前記弁
座に接触した前記弁棒と前記弁ポートとの間に、前記第
1の間隙と連通する第2の間隙を形成して、前記第1の
間隙及び前記第2の間隙により、前記弁室から前記第2
の通路に向かう流体が、前記弁座と前記弁棒とが接触し
た状態において段階的に絞られる絞り通路を構成したこ
とを特徴とする。According to a first aspect of the present invention, there is provided a throttle device according to the present invention, wherein a valve stem provided in a valve chamber communicating with a first passage is provided between the valve chamber and a second valve chamber. In a throttle device that comes into contact with and separates from a valve seat of a valve port interposed between the valve seat and the valve seat, a groove formed in one of the valve stem and the valve seat allows the valve seat and the valve seat to be separated from each other. A first gap is formed between the valve stem and the contacted valve stem, and a second gap communicating with the first gap is formed between the valve stem and the valve port contacted with the valve seat. Then, the first gap and the second gap allow the second space to be removed from the valve chamber.
The fluid flowing toward the passage is formed in a throttle passage that is gradually reduced in a state where the valve seat and the valve stem are in contact with each other.
【0032】また、請求項2に記載した本発明の絞り装
置は、前記弁棒に、大径部と該大径部よりも前記弁棒の
先端側に位置する小径部とを設けて、該小径部と前記大
径部との段差部端面が前記弁座に接触するように前記弁
棒を形成し、前記段差部端面と前記弁座とのうちいずれ
か一方に前記溝を形成して、前記段差部端面と前記弁座
との間に前記第1の間隙を形成するものとした。Further, in the throttle device according to the present invention, the valve stem is provided with a large-diameter portion and a small-diameter portion located on the distal end side of the valve stem with respect to the large-diameter portion. The valve stem is formed such that a step end surface of the small diameter portion and the large diameter portion comes into contact with the valve seat, and the groove is formed in one of the step end surface and the valve seat, The first gap is formed between the end face of the step portion and the valve seat.
【0033】さらに、請求項3に記載した本発明の絞り
装置は、前記弁ポートに、大径ポート部と、該大径ポー
ト部よりも前記第2の通路側に位置して前記大径ポート
部に連なる小径ポート部とを設けて、前記段差部端面と
前記弁座とが接触した状態において、前記大径ポート部
と前記小径ポート部との段差ポート部端面に前記小径部
の先端面が間隔をおいて臨むように前記弁ポートを形成
し、前記段差ポート部端面と前記小径部の先端面との間
に前記第2の間隙を形成するものとした。Further, in the throttle device according to the present invention, the valve port may include a large-diameter port portion, and the large-diameter port located closer to the second passage than the large-diameter port portion. A small-diameter port portion connected to the portion is provided, and in a state where the end surface of the step portion and the valve seat are in contact with each other, the tip surface of the small-diameter portion is provided at the end surface of the step port portion between the large-diameter port portion and the small-diameter port portion. The valve port is formed so as to face at an interval, and the second gap is formed between the end surface of the stepped port portion and the end surface of the small diameter portion.
【0034】また、請求項4に記載した本発明の絞り装
置は、前記小径部の外周面と前記弁ポートの内周面との
間に前記第2の間隙を形成するものとした。According to a fourth aspect of the present invention, the second gap is formed between the outer peripheral surface of the small diameter portion and the inner peripheral surface of the valve port.
【0035】さらに、請求項5に記載した本発明の絞り
装置は、前記弁座のうち前記弁ポートの開口縁に位置す
る弁座部分に前記弁棒の外周面のうち該弁棒の先端寄り
の外周面部分が接触するように前記弁棒及び前記弁座を
形成し、前記弁座部分と前記外周面部分とのうちいずれ
か一方に前記溝を形成して、前記弁座部分と前記外周面
部分との間に前記第1の間隙を形成するものとした。Further, in the throttle device according to the present invention, the valve seat portion of the valve seat located at the opening edge of the valve port is located on the outer peripheral surface of the valve stem near the tip of the valve stem. The valve stem and the valve seat are formed so that the outer peripheral surface portions thereof come into contact with each other, and the groove is formed in one of the valve seat portion and the outer peripheral surface portion, so that the valve seat portion and the outer peripheral surface are formed. The first gap is formed between the first gap and the surface portion.
【0036】また、請求項6に記載した本発明の絞り装
置は、前記弁ポートに、大径ポート部と、該大径ポート
部よりも前記第2の通路側に位置して前記大径ポート部
に連なる小径ポート部とを設けて、前記弁座部分と前記
外周面部分とが接触した状態において、前記大径ポート
部と前記小径ポート部との段差ポート部端面に前記弁棒
の先端面が間隔をおいて臨むように前記弁ポートを形成
し、前記段差ポート部端面と前記弁棒の先端面との間に
前記第2の間隙を形成するものとした。In the throttling device according to the present invention, the valve port may include a large-diameter port portion and the large-diameter port located closer to the second passage than the large-diameter port portion. A small-diameter port portion connected to the portion, and in a state where the valve seat portion and the outer peripheral surface portion are in contact with each other, a tip end surface of the valve stem is provided at an end surface of a stepped port portion between the large-diameter port portion and the small-diameter port portion. The valve port is formed so as to face at an interval, and the second gap is formed between the end face of the stepped port portion and the tip face of the valve stem.
【0037】さらに、請求項7に記載した本発明の絞り
装置は、前記弁ポートに、大径ポート部と、該大径ポー
ト部よりも前記第2の通路側に位置して前記大径ポート
部に連なる小径ポート部とを設けて、前記弁座部分と前
記外周面部分とが接触した状態において、前記大径ポー
ト部と前記小径ポート部との段差ポート部に前記外周面
部分がさらに接触するように前記弁ポートを形成すると
共に、前記段差ポート部と前記外周面部分とのうちいず
れか一方に形成された第2の溝により、前記段差ポート
部と前記外周面部分との間に前記第2の間隙を形成する
ものとした。The throttling device according to the present invention as set forth in claim 7, wherein the valve port has a large-diameter port, and the large-diameter port is located on the second passage side of the large-diameter port. A small-diameter port portion connected to the portion, and in a state where the valve seat portion and the outer peripheral surface portion are in contact with each other, the outer peripheral surface portion further contacts a step port portion between the large-diameter port portion and the small-diameter port portion. And the second port formed in one of the step port portion and the outer peripheral surface portion, the valve port is formed between the step port portion and the outer peripheral surface portion. A second gap was formed.
【0038】請求項1に記載した本発明の絞り装置によ
れば、弁棒が弁座に接触するのに伴って、弁棒と弁座と
のうちいずれか一方に形成された溝により弁棒と弁座と
の間に形成される第1の間隙と、弁棒と弁ポートとの間
に形成されて第1の間隙と連通する第2の間隙とによ
り、弁室から第2の通路に向かう流体を段階的に絞る絞
り通路が、弁室と第2の通路との間に連続して形成され
ることから、これら第1及び第2の各間隙により流体を
各々段階的に絞って、絞り通路の全体により大きい絞り
量を得ることが可能となる。According to the throttle device of the present invention, as the valve stem comes into contact with the valve seat, the valve stem is formed by the groove formed in one of the valve stem and the valve seat. A first gap formed between the valve chamber and the valve seat, and a second gap formed between the valve stem and the valve port and communicating with the first gap, from the valve chamber to the second passage. Since the throttle passage that throttles the fluid that flows in a stepwise manner is formed continuously between the valve chamber and the second passage, the fluid is throttled stepwise by each of the first and second gaps. It is possible to obtain a larger throttle amount in the entire throttle passage.
【0039】しかも、請求項1に記載した本発明の絞り
装置によれば、第1及び第2の各間隙における絞り量
を、絞り通路全体での絞り量に比べて小さい値で済ます
ことができることから、流勢の急激な変動による笛吹き
音の発生、増大や、流体の流れに大きな負荷が加わるこ
とによる振動音の発生、増大を防ぐことが可能となる。Further, according to the throttle device of the present invention, the throttle amount in each of the first and second gaps can be smaller than the throttle amount in the entire throttle passage. Accordingly, it is possible to prevent the occurrence and increase of the whistling sound due to the rapid fluctuation of the flow, and the occurrence and increase of the vibration sound due to the application of a large load to the flow of the fluid.
【0040】その上、請求項1に記載した本発明の絞り
装置によれば、弁棒が弁座から離間すると、それに応じ
て第1の間隙や第2の間隙が共に大きくなるので、第1
及び第2の各間隙に流体中を浮遊するゴミやコンタミ
(汚物)等が付着堆積しても、弁棒の開弁動作をロック
させる事態や流体通路の閉塞が発生することがなく、ま
た、絞り通路が第1及び第2の複数の間隙により構成さ
れていることから、絞られた流体の流勢が偏って弁棒に
作用する等して流体の流動音の騒音レベルが増大するこ
とがなく、よって、絞り量を大きくするために絞り通路
の断面積を小さくしても、動作上及び騒音対策上、不都
合を生じることがないようにすることが可能となる。In addition, according to the throttling device of the present invention, when the valve stem is separated from the valve seat, the first gap and the second gap both increase accordingly.
Even if dust and contaminants (dirt) floating in the fluid adhere to and accumulate in each of the second gaps, there is no possibility of locking the valve-opening operation or blocking of the fluid passage. Since the throttle passage is constituted by the first and second gaps, the noise level of the flow noise of the fluid may increase due to the biased flow of the fluid acting on the valve stem. Therefore, even if the cross-sectional area of the throttle passage is reduced to increase the throttle amount, it is possible to prevent inconvenience in operation and noise reduction.
【0041】さらに、請求項1に記載した本発明の絞り
装置によれば、弁棒と弁座とのうちいずれか一方に形成
される溝が、これら弁棒と弁座との間に第1の間隙を形
成することから、この溝の数や断面積を適宜調整するこ
とで、第1の間隙乃至絞り通路全体での絞り量を任意に
設定することが可能となる。Further, according to the throttle device of the present invention, the groove formed in one of the valve stem and the valve seat is provided between the valve stem and the valve seat. Therefore, by appropriately adjusting the number and the cross-sectional area of the grooves, it is possible to arbitrarily set the throttle amount in the first gap or the entire throttle passage.
【0042】また、請求項2に記載した本発明の絞り装
置によれば、弁棒に設けた大径部と小径部との段差部端
面が弁座に接触すると、この段差部端面と弁座とのうち
いずれか一方に形成した溝によって、弁座とこの弁座に
接触した弁棒の段差部端面との間に第1の間隙が形成さ
れるので、弁棒と弁座との間に第1の間隙を形成させる
ために必要な溝を、弁棒の段差部端面又は弁座に対する
切削等の簡単な加工により容易に形成することが可能と
なる。According to the throttling device of the present invention, when the end face of the step portion between the large diameter portion and the small diameter portion provided on the valve stem comes into contact with the valve seat, the end face of the step portion and the valve seat are provided. The first gap is formed between the valve seat and the end face of the step portion of the valve stem in contact with the valve seat by the groove formed in any one of the valve seat and the valve seat. Grooves necessary for forming the first gap can be easily formed by simple processing such as cutting of the end face of the step portion of the valve stem or the valve seat.
【0043】さらに、請求項3に記載した本発明の絞り
装置によれば、弁棒の段差部端面が弁座に接触すると、
弁ポートに設けた大径ポート部及び小径ポート部の段差
ポート部端面と、弁棒の小径部の先端面との間に第2の
間隙が形成されるので、弁棒が弁座に接触離間する方向
における、弁棒の小径部の寸法や弁ポートの大径ポート
部の寸法を適宜調整することで、第2の間隙乃至絞り通
路全体での絞り量を任意に設定することが可能となる。Further, according to the expansion device of the present invention, when the end face of the step portion of the valve stem comes into contact with the valve seat,
Since the second gap is formed between the end face of the stepped portion of the large-diameter port portion and the small-diameter port portion provided in the valve port and the front end face of the small-diameter portion of the valve stem, the valve stem comes into contact with and separates from the valve seat. By appropriately adjusting the size of the small-diameter portion of the valve stem and the size of the large-diameter port portion of the valve port in the direction in which the valve is closed, it is possible to arbitrarily set the throttle amount in the second gap or the entire throttle passage. .
【0044】同様に、請求項4に記載した本発明の絞り
装置によれば、弁棒の段差部端面が弁座に接触すると、
弁ポートの内周面と小径部の外周面との間に第2の間隙
が形成されるので、弁棒の小径部の外径や弁ポートの内
径を適宜調整することで、第2の間隙乃至絞り通路全体
での絞り量を任意に設定することが可能となる。Similarly, according to the throttling device of the present invention, when the end face of the step portion of the valve stem comes into contact with the valve seat,
Since the second gap is formed between the inner peripheral surface of the valve port and the outer peripheral surface of the small diameter portion, by appropriately adjusting the outer diameter of the small diameter portion of the valve rod and the inner diameter of the valve port, the second gap is formed. In addition, it is possible to arbitrarily set the throttle amount in the entire throttle passage.
【0045】さらに、請求項5に記載した本発明の絞り
装置によれば、弁ポートの開口縁に位置する弁座部分に
弁棒の先端寄りの外周面部分が接触すると、この弁座部
分と弁棒の先端寄りの外周面部分とのうちいずれか一方
に形成した溝によって、弁ポートの開口縁に位置する弁
座部分と、この弁座部分に接触した弁棒の先端寄りの外
周面部分との間に第1の間隙が形成されるので、弁棒と
弁座との間に第1の間隙を形成させるために必要な溝
を、弁ポートの開口縁に位置する弁座部分、又は、弁棒
の先端寄りの外周面部分に対する切削等の簡単な加工に
より容易に形成することが可能となる。Further, according to the throttling device of the present invention, when the outer peripheral surface portion near the tip of the valve stem comes into contact with the valve seat portion located at the opening edge of the valve port, the valve seat portion and The valve seat portion located at the opening edge of the valve port by the groove formed on one of the outer peripheral surface portion near the tip of the valve stem, and the outer peripheral surface portion near the tip of the valve stem in contact with the valve seat portion Since a first gap is formed between the valve seat and the valve seat, a groove necessary for forming the first gap between the valve stem and the valve seat is formed in a valve seat portion located at an opening edge of the valve port, or It can be easily formed by simple processing such as cutting of the outer peripheral surface near the tip of the valve stem.
【0046】また、請求項6に記載した本発明の絞り装
置によれば、弁ポートの開口縁に位置する弁座部分に弁
棒の先端寄りの外周面部分が接触すると、弁ポートに設
けた大径ポート部及び小径ポート部の段差ポート部端面
と、弁棒の先端寄りの外周面部分との間に第2の間隙が
形成されるので、弁棒が弁座に接触離間する方向におけ
る、弁棒の寸法や弁ポートの大径ポート部の寸法を適宜
調整することで、第2の間隙乃至絞り通路全体での絞り
量を任意に設定することが可能となる。According to the throttling device of the present invention, when the outer peripheral surface near the tip of the valve stem comes into contact with the valve seat located at the opening edge of the valve port, the valve is provided at the valve port. Since the second gap is formed between the stepped port portion end face of the large diameter port portion and the small diameter port portion and the outer peripheral surface portion near the tip of the valve stem, in the direction in which the valve stem contacts and separates from the valve seat, By appropriately adjusting the size of the valve stem and the size of the large-diameter port portion of the valve port, it is possible to arbitrarily set the throttle amount in the second gap or the entire throttle passage.
【0047】さらに、請求項7に記載した本発明の絞り
装置によれば、弁ポートの段差ポート部と弁棒の先端寄
りの外周面部分とのうちいずれか一方に形成される第2
の溝が、これら弁棒と弁ポートとの間に第2の間隙を形
成することから、この第2の溝の数や断面積を適宜調整
することで、第2の間隙乃至絞り通路全体での絞り量を
任意に設定することが可能となる。Further, according to the throttling device of the present invention, the second port formed on one of the step port portion of the valve port and the outer peripheral surface portion near the tip of the valve stem.
Groove forms a second gap between the valve stem and the valve port. By appropriately adjusting the number and the cross-sectional area of the second groove, the second gap or the entire throttle passage can be formed. Can be set arbitrarily.
【0048】しかも、請求項7に記載した本発明の絞り
装置によれば、弁ポートの開口縁に位置する弁座部分に
弁棒の先端寄りの外周面部分が接触すると、弁ポートの
段差ポート部と弁棒の先端寄りの外周面部分との間に第
2の間隙が形成されるので、弁棒と弁ポートとの間に第
1の間隙と連通する第2の間隙を形成させるために必要
な第2の溝を、弁ポートの段差ポート部、又は、弁棒の
先端寄りの外周面部分に対する切削等の簡単な加工によ
り容易に形成することが可能となる。Further, according to the throttling device of the present invention, when the outer peripheral surface portion near the tip end of the valve stem comes into contact with the valve seat portion located at the opening edge of the valve port, the step port of the valve port is provided. Since the second gap is formed between the portion and the outer peripheral surface portion near the tip of the valve stem, the second gap is formed between the valve stem and the valve port so as to communicate with the first gap. The necessary second groove can be easily formed by a simple process such as cutting of the step port portion of the valve port or the outer peripheral surface portion near the tip of the valve stem.
【0049】[0049]
【発明の実施の形態】以下、本発明の実施形態を、図面
により説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0050】図1及び図2は、本発明の第1実施形態に
係る絞り装置を示す縦断面図であって、31は電磁コイ
ル、32はガイド、33はプランジャ、34は緩衝材、
1は弁棒、35はバネ、36は吸引子、4は弁ハウジン
グ、37は筒状部、3は切り込み溝、2は弁座、8は弁
室、9は弁ポート、10,11は配管である。FIGS. 1 and 2 are longitudinal sectional views showing a diaphragm device according to a first embodiment of the present invention, in which 31 is an electromagnetic coil, 32 is a guide, 33 is a plunger, 34 is a cushioning material,
1 is a valve rod, 35 is a spring, 36 is a suction element, 4 is a valve housing, 37 is a cylindrical portion, 3 is a cut groove, 2 is a valve seat, 8 is a valve chamber, 9 is a valve port, 10 and 11 are piping. It is.
【0051】同図において、弁ハウジング4の内部には
弁室8が設けられており、この弁室8内には、弁棒1
が、図面上、上下方向に移動可能に設けられている。ま
た、この弁室8には、出口配管11(請求項中の第2の
通路に相当)と連通する弁ポート9を有する弁座2が形
成されており、弁棒1が閉じている場合には、弁室8が
高圧側となり、弁ポート9が低圧側となる。In the figure, a valve chamber 8 is provided inside the valve housing 4, and the valve rod 1 is provided in the valve chamber 8.
Are provided movably in the vertical direction on the drawing. The valve chamber 8 is formed with a valve seat 2 having a valve port 9 communicating with an outlet pipe 11 (corresponding to a second passage in the claims). The valve chamber 8 is on the high pressure side and the valve port 9 is on the low pressure side.
【0052】尚、弁ポート9は、弁室8側の大径部6a
(請求項中の大径ポート部に相当)と、この大径部6a
よりも小さい内径で形成された出口配管11側の小径部
6b(請求項中の小径ポート部に相当)とにより構成さ
れている。The valve port 9 has a large diameter portion 6a on the valve chamber 8 side.
(Corresponding to the large-diameter port portion in the claims) and the large-diameter portion 6a
And a small-diameter portion 6b (corresponding to a small-diameter port portion in the claims) on the outlet pipe 11 side having a smaller inner diameter.
【0053】弁ハウジング4には、筒状部37がろう付
け等により一体化されており、その内部の、図面上、上
部にガイド32が、同じく下部に吸引子36が各々設け
られ、これらの間に弁棒1と一体となったプランジャ3
3が配置されている。このプランジャ33は筒状をなし
ており、この筒状部がガイド32の突出部と筒状部37
との間に配置されている。A cylindrical portion 37 is integrated with the valve housing 4 by brazing or the like, and a guide 32 is provided at an upper portion in the drawing, and a suction element 36 is provided at a lower portion in the drawing. Plunger 3 integrated with valve stem 1 in between
3 are arranged. The plunger 33 is formed in a cylindrical shape, and the cylindrical portion is formed between the projecting portion of the guide 32 and the cylindrical portion 37.
And is located between.
【0054】また、このプランジャ33は、吸引子36
に固定されたバネ35によって上方、即ち、ガイド32
に接近する方向に付勢されている。さらに、筒状部37
の外面側には、電磁コイル31が設けられている。The plunger 33 is provided with a suction element 36.
, Ie, the guide 32
Is biased in the direction to approach. Further, the cylindrical portion 37
An electromagnetic coil 31 is provided on the outer surface side of.
【0055】また、プランジャ33の先端部に対向する
ガイド32のフランジ状端面部分には緩衝材34が設け
られており、このガイド32部分が、バネ35の付勢力
によるプランジャ33の移動を規制するストッパとなっ
ている。A cushioning material 34 is provided on the flange-like end surface of the guide 32 facing the tip of the plunger 33. The guide 32 regulates the movement of the plunger 33 due to the urging force of the spring 35. It is a stopper.
【0056】かかる構成により、電磁コイル31に通電
されると、吸引子36とプランジャ33との間に、プラ
ンジャ33をバネ35の付勢力に抗して図面上において
下動させる方向への電磁力が発生する。With this configuration, when the electromagnetic coil 31 is energized, the electromagnetic force between the suction element 36 and the plunger 33 in the direction of lowering the plunger 33 on the drawing against the urging force of the spring 35. Occurs.
【0057】弁棒1の先端部は、内部を先端面側から座
ぐった釣り鐘状をなしており、かつ、弁棒1の先端部の
外周面は、弁ポート9の大径部6aの内径よりも若干大
きい外径の大径部12aと、この大径部12aよりも弁
棒1の先端寄りに配置され、弁ポート9の小径部6bの
内径よりも若干大きく大径部12aの内径よりも小さい
外径の小径部12bとにより、階段状に形成されてい
る。The distal end of the valve stem 1 is shaped like a bell which sits inside from the tip end side, and the outer peripheral surface of the distal end of the valve stem 1 is larger than the inner diameter of the large diameter portion 6 a of the valve port 9. A large diameter portion 12a having an outer diameter slightly larger than the large diameter portion 12a and disposed closer to the distal end of the valve stem 1 and slightly larger than the inner diameter of the small diameter portion 6b of the valve port 9 and larger than the inner diameter of the large diameter portion 12a. The small diameter portion 12b having a small outer diameter is formed in a step shape.
【0058】また、弁棒1の先端部における周面のう
ち、弁棒1の周方向に間隔をおいた複数の周面箇所に
は、図3に要部拡大断面図で示すように、大径部12a
と小径部12bとに跨るようにドリル等で穴5が形成さ
れていて、この穴5によって、大径部12aと小径部1
2bとの段差面12c(請求項中の段差部端面に相当)
に、半円状の断面を有する切り込み溝3(請求項中の溝
に相当)が、弁棒1の周方向に間隔をおいて複数設けら
れている。As shown in the enlarged sectional view of the main part in FIG. 3, a plurality of peripheral surfaces at intervals in the circumferential direction of the valve stem 1 of the peripheral surface at the distal end of the valve stem 1 are provided. Diameter part 12a
A hole 5 is formed by a drill or the like so as to straddle the small diameter portion 12b and the large diameter portion 12a and the small diameter portion 1b.
Step surface 12c with step 2b (corresponding to step end face in claims)
In addition, a plurality of cut grooves 3 having a semicircular cross section (corresponding to grooves in the claims) are provided at intervals in the circumferential direction of the valve stem 1.
【0059】かかる構成において、電磁コイル31に通
電すると、図1に示すように、吸引子36とプランジャ
33との間に発生する大きな電磁力により、バネ35の
付勢力に抗してプランジャ33が、吸引子36に当接す
るまで押し下げられ、弁棒1の先端が弁座2に接触する
閉弁状態となる。In this configuration, when the electromagnetic coil 31 is energized, as shown in FIG. 1, a large electromagnetic force generated between the attraction element 36 and the plunger 33 causes the plunger 33 to resist the urging force of the spring 35. Then, the valve is pushed down until it comes into contact with the suction element 36, and the valve rod 1 is brought into a closed state in which the tip of the valve rod 1 contacts the valve seat 2.
【0060】この時、図3に示すように、弁棒1の大径
部12aと小径部12bとの段差面12cに設けられて
いる切り込み溝3と、弁座2のうち弁ポート9の大径部
6aの先端面部分とにより第1絞り部13a(請求項中
の第1の間隙に相当)が形成され、弁棒1の小径部12
bの先端面12dと、弁ポート9の大径部6a及び小径
部6bの段差面6c(請求項中の段差ポート部端面に相
当)とにより第2絞り部13b(請求項中の第2の間隙
に相当)が形成される。At this time, as shown in FIG. 3, the cut groove 3 provided on the step surface 12c between the large-diameter portion 12a and the small-diameter portion 12b of the valve stem 1, and the large size of the valve port 9 of the valve seat 2. A first throttle portion 13a (corresponding to a first gap in the claims) is formed by the distal end surface portion of the diameter portion 6a, and the small diameter portion 12 of the valve stem 1 is formed.
b, and a stepped surface 6c of the large diameter portion 6a and the small diameter portion 6b of the valve port 9 (corresponding to an end surface of the stepped port portion in the claims) to form a second throttle portion 13b (second in the claims). (Corresponding to a gap).
【0061】また、弁棒1の小径部12bの外周面と弁
ポート9の大径部6aの内周面とにより、第1絞り部1
3aと第2絞り部13bとを連通させる接続通路14が
形成され、これら第1絞り部13a、接続通路14、及
び、第2絞り部13bによって絞り通路が形成されて、
この絞り通路を介して、入口配管10(請求項中の第1
の通路に相当)と連通する弁室8と出口配管11とが、
閉弁状態において接続される。The outer peripheral surface of the small-diameter portion 12b of the valve stem 1 and the inner peripheral surface of the large-diameter portion 6a of the valve port 9 form the first throttle 1
A connection passage 14 is formed to allow the 3a and the second throttle portion 13b to communicate with each other. A throttle passage is formed by the first throttle portion 13a, the connection passage 14, and the second throttle portion 13b.
Through the throttle passage, the inlet pipe 10 (the first pipe in the claims)
The valve chamber 8 and the outlet pipe 11 communicating with the
Connected in valve closed state.
【0062】一方、電磁コイル31への通電を停止する
と、上記の電磁力がなくなるため、図2に示すように、
プランジャ33がバネ35の付勢力によって、緩衝材3
4にプランジャ33の先端部が当接するまで押し上げら
れ、これにより弁棒1が持ち上げられて弁座2から離れ
た開弁状態となる。On the other hand, when the energization of the electromagnetic coil 31 is stopped, the above-mentioned electromagnetic force disappears, so that as shown in FIG.
When the plunger 33 is biased by the spring 35,
4 is pushed up until the tip of the plunger 33 comes into contact with the plunger 33, whereby the valve stem 1 is lifted to be in an open state separated from the valve seat 2.
【0063】よって、第1絞り部13a、接続通路1
4、及び、第2絞り部13bがいずれもなくなって、弁
室8と出口配管11とが弁ポート9を介して連通する。Therefore, the first throttle portion 13a, the connection passage 1
4 and the second throttle portion 13b are eliminated, and the valve chamber 8 communicates with the outlet pipe 11 via the valve port 9.
【0064】このような構成による第1実施形態に係る
絞り装置では、弁ポート9の小径部6bの内径D1が少
なくとも出口配管11の内径D2以上の寸法であれば、
弁棒1の全開時には、弁室8から弁ポート9を経て出口
配管11に向かう際に流体の流れの向きが変わることに
よる圧力降下で損失が生ずるのみであって、低圧力損失
の絞り通路を形成することになる。In the throttle device according to the first embodiment having such a configuration, if the inner diameter D1 of the small diameter portion 6b of the valve port 9 is at least as large as the inner diameter D2 of the outlet pipe 11,
When the valve stem 1 is fully opened, a loss only occurs due to a pressure drop caused by a change in the direction of the flow of the fluid from the valve chamber 8 to the outlet pipe 11 via the valve port 9. Will be formed.
【0065】また、弁棒1の全閉時には、第1絞り部1
3a、接続通路14、及び、第2絞り部13bからなる
絞り通路が形成されて、必要な圧力降下をもたらすこと
になる。When the valve stem 1 is fully closed, the first throttle 1
A throttle passage consisting of 3a, connection passage 14 and second throttle 13b is formed, resulting in the required pressure drop.
【0066】また、弁ポート9の小径部6bの内径D1
が出口配管11の内径D2より小さければ、この内径差
により弁棒1の全開時にも絞り効果が発生するので、こ
の絞り装置は、全開時と全閉時とで絞り量が異なる絞り
弁ということになる。The inner diameter D1 of the small diameter portion 6b of the valve port 9
Is smaller than the inner diameter D2 of the outlet pipe 11, a throttle effect occurs even when the valve rod 1 is fully opened due to the difference in the inner diameter. Therefore, this throttle device is a throttle valve having a different throttle amount between when fully opened and when fully closed. become.
【0067】さらに、図1乃至図3に示す第1実施形態
の絞り装置では、第1絞り部13a及び第2絞り部13
bという、2段階の絞り比の絞り部を有しているため、
同じ絞り量を確保する上で、1段階で絞る場合よりも、
1つの絞り部当たりの絞り量が小さくてよい。これによ
り、第1絞り部13aや第2絞り部13b、ひいては、
絞り通路全体の断面積を大きくできる。Further, in the stop device of the first embodiment shown in FIGS. 1 to 3, the first stop portion 13a and the second stop portion 13
b, which has a two-stage aperture ratio,
In order to secure the same amount of aperture, compared to the case of one-step aperture,
The amount of aperture per one aperture may be small. Thereby, the first throttle unit 13a and the second throttle unit 13b, and eventually,
The cross-sectional area of the entire throttle passage can be increased.
【0068】そして、流動音は流速の2乗、即ち流量の
2乗に対して線形に増加することが実験的に判っている
ので、絞り装置を前述のような構造にすることで、絞り
装置の出口での流体の流速を減速することができ、流動
音を低減できる。Since it is experimentally known that the flow noise increases linearly with the square of the flow velocity, that is, the square of the flow rate, the throttle device having the above-described structure can be used. The flow velocity of the fluid at the outlet can be reduced, and the flow noise can be reduced.
【0069】図6は、第1実施形態に係る絞り装置と比
較するための、絞り通路が1段階での絞りで構成されて
いる絞り装置を示している。この絞り装置は、弁棒1側
ではなく弁座2側に、弁室8から出口配管11に向かう
につれて出口配管11の中心側に近づくように傾斜した
切り込み溝3が形成されており、弁棒1が全閉になる
と、弁棒1の先端部外周面に形成されたテーパ面15と
切り込み溝3とにより、絞り部13が形成される。FIG. 6 shows a throttle device in which the throttle passage is constituted by a one-stage throttle for comparison with the throttle device according to the first embodiment. In this throttle device, a cut groove 3 is formed on the valve seat 2 side, not the valve rod 1 side, so as to approach the center side of the outlet pipe 11 from the valve chamber 8 toward the outlet pipe 11. When the valve 1 is fully closed, the constricted portion 13 is formed by the tapered surface 15 formed on the outer peripheral surface of the distal end portion of the valve stem 1 and the cut groove 3.
【0070】このような1段階の絞り通路を有する図6
の絞り装置に比べて、図1乃至図3に示す第1実施形態
の絞り装置では、全体の絞り量と流体の流量とがいずれ
も同じ値であったとしても、発生する流動音は図6の絞
り装置よりも小さくなる。FIG. 6 having such a one-stage throttle passage
Compared with the throttle device of the first embodiment, in the throttle device of the first embodiment shown in FIGS. 1 to 3, even if the entire throttle amount and the flow rate of the fluid are all the same value, the generated flow noise is as shown in FIG. Is smaller than the aperture device.
【0071】図7は、気液二相流を絞り装置に流したと
きに絞り装置において発生する流動音の騒音レベルと、
絞り装置の出口における流体の流速との関係を実験的に
求めた結果を示すグラフであり、この実験的に求めた結
果によれば、騒音レベルは出口における流体の流速の二
乗に対して線形に変化するため、流体の出口流速を低減
させると騒音レベルは流速の二乗で低減することにな
る。FIG. 7 shows the noise level of the flow noise generated in the throttle device when the gas-liquid two-phase flow is passed through the throttle device.
It is a graph which shows the result of having experimentally calculated | required the relationship with the flow velocity of the fluid in the outlet of a throttle apparatus, According to this experimentally determined result, a noise level is linear with respect to the square of the flow velocity of the fluid in an outlet. Because of the variation, reducing the outlet flow velocity of the fluid will reduce the noise level by the square of the flow velocity.
【0072】したがって、同じ絞り量を得るにしても、
1段階で絞るよりも2段階に分割して絞る方が絞りの断
面積を大きく設定することができ、その結果、例えば、
出口の断面積を2倍にすると出口流速が6dB低減でき
るというように、出口流速を抑制できて流体の騒音レベ
ルも抑制することができる。Therefore, even if the same aperture amount is obtained,
It is possible to set a larger cross-sectional area of the diaphragm by dividing the diaphragm into two stages and narrowing the diaphragm than in one stage, and as a result, for example,
If the cross-sectional area of the outlet is doubled, the outlet flow velocity can be suppressed, and the noise level of the fluid can be suppressed, such that the outlet flow velocity can be reduced by 6 dB.
【0073】このように、複数の絞り比の絞り部を接続
し、流体を多段階で減圧することで、さらに流動音を低
減することができる。As described above, the flow noise can be further reduced by connecting the throttle portions with a plurality of throttle ratios and reducing the pressure of the fluid in multiple stages.
【0074】また、第1実施形態に係る絞り装置におい
ては、弁室8に連通する第1絞り部13aを構成する弁
棒1の切り込み溝3と弁座2の周囲の弁ハウジング4部
分の内面との間隙を広げる方向に、弁棒1の開弁動作が
行われるので、図4に示すように、配管内の浮遊物53
が第1絞り部13aに付着堆積した場合でも、図5に示
すように、弁棒1を開弁動作させて、弁棒1の切り込み
溝3と弁座2の周囲の弁ハウジング4部分の内面とを離
間させれば、浮遊物53が弁ハウジング4の内面上に残
されて、入口配管10から弁室8を経て出口配管11に
向かう流体の流勢により出口配管11側に流される。In the throttle device according to the first embodiment, the inner surface of the cutout groove 3 of the valve rod 1 and the valve housing 4 around the valve seat 2 constituting the first throttle portion 13a communicating with the valve chamber 8. 4, the valve opening operation of the valve stem 1 is performed in a direction to widen the gap between the floating member 53 and the floating material 53 in the pipe.
Even if is adhered and deposited on the first throttle portion 13a, the valve rod 1 is operated to open as shown in FIG. 5, and the inner surface of the cut groove 3 of the valve rod 1 and the valve housing 4 around the valve seat 2. Is separated, the suspended matter 53 is left on the inner surface of the valve housing 4 and flows toward the outlet pipe 11 by the flow of the fluid from the inlet pipe 10 to the outlet pipe 11 via the valve chamber 8.
【0075】さらに、弁棒1の開弁動作が、弁室8に連
通する第1絞り部13aを形成する弁棒1の切り込み溝
3と弁座2の周囲の弁ハウジング4部分の内面との間隙
を広げる方向に行われることから、第1絞り部13aに
浮遊物(ゴミやコンタミ等)が食い込んで弁棒1が開弁
不能なロック状態となることもない。Further, the valve-opening operation of the valve stem 1 is controlled by the notch groove 3 of the valve stem 1 forming the first throttle portion 13 a communicating with the valve chamber 8 and the inner surface of the valve housing 4 surrounding the valve seat 2. Since the operation is performed in the direction in which the gap is widened, there is no possibility that the floating material (dust, contamination, or the like) enters the first throttle portion 13a and the valve rod 1 does not enter the locked state where the valve cannot be opened.
【0076】しかも、第1実施形態に係る絞り装置で
は、1段階で絞る場合よりも、1段当たりの絞り量を小
さくでき、絞り部の断面積を大きくできるので、ゴミ詰
まりに対してもさらに信頼性が高い。In addition, in the aperture device according to the first embodiment, the aperture amount per stage can be reduced and the cross-sectional area of the aperture portion can be increased as compared with the case where the aperture is reduced in one stage, so that the clogging of dust is further improved. High reliability.
【0077】このように、第1実施形態に係る絞り装置
は、絞り通路の詰まりのない信頼性の高い絞りを有し、
その結果、絞り量の大きい即ち絞り径の小さな絞りを設
けることができ、さらに絞りを通過する流体の流速を減
速できるので、流体流動音も大幅に低減できる。As described above, the throttle device according to the first embodiment has a highly reliable throttle without clogging of the throttle passage.
As a result, a throttle having a large throttle amount, that is, a throttle having a small diameter can be provided, and the flow velocity of the fluid passing through the throttle can be reduced, so that the fluid flow noise can be significantly reduced.
【0078】しかも、第1実施形態に係る絞り装置によ
れば、弁棒1の大径部12aの端面に形成する切り込み
溝3の数や断面積を適宜調整することで、第1絞り部1
3a乃至絞り通路全体での絞り量を任意に設定すること
ができる。Further, according to the throttle device according to the first embodiment, the number and the cross-sectional area of the cut grooves 3 formed on the end face of the large-diameter portion 12a of the valve stem 1 are appropriately adjusted, so that the first throttle portion 1 is formed.
3a to the throttle amount in the entire throttle passage can be arbitrarily set.
【0079】尚、弁棒1の大径部12aと小径部12b
との段差面12cに切り込み溝3を形成する代わりに、
この段差面12cに対向する、弁座2のうち弁ポート9
の大径部6aの先端面部分に切り込み溝を形成すること
で、弁棒1と弁座2との間に第1絞り部が形成されるす
るように構成してもよい。The large diameter portion 12a and the small diameter portion 12b of the valve stem 1
Instead of forming the cut groove 3 on the step surface 12c with
The valve port 9 of the valve seat 2 facing the step surface 12c
The first throttle portion may be formed between the valve stem 1 and the valve seat 2 by forming a cut groove in the distal end surface portion of the large diameter portion 6a.
【0080】また、弁ポート9の大径部6aと小径部6
bとの間を段差面6cとする代わりに、図8に第1実施
形態の変形例に係る絞り装置の要部拡大断面図で示すよ
うに、テーパ面6fとすると共に、弁棒1の小径部12
bの先端面12d寄り部分を先細りのテーパ面12fと
して、弁ポート9の大径部6aの端面に弁棒1の段差面
12cが接触した状態で、弁ポート9のテーパ面6fと
弁棒1のテーパ面12fとにより第2絞り部13bが形
成されるように構成してもよい。The large diameter portion 6a and the small diameter portion 6 of the valve port 9 are
Instead of the step surface 6c between the valve member 1b and the small diameter of the valve stem 1, instead of the step surface 6c, as shown in an enlarged sectional view of a main part of the expansion device according to the modification of the first embodiment in FIG. Part 12
The tapered surface 12f of the valve port 1 contacts the end face of the large diameter portion 6a of the valve port 9 with the tapered surface 6f of the valve port 9 while the tapered surface 12f of the valve port b is tapered. The second constricted portion 13b may be formed by the tapered surface 12f.
【0081】そして、上述した変形例のように構成すれ
ば、第2絞り部13bにより絞られた流体が出口配管1
1の軸方向及び径方向のいずれに対しても傾斜した方向
に噴出することになり、第1実施形態の絞り装置のよう
に、第2絞り部13bにより絞られた流体を出口配管1
1の軸方向と直交する径方向に噴出させる場合に比べ
て、各切り込み溝3による第2絞り部13bを通過した
噴出流体どうしの緩衝や、弁ポート9の小径部6bの内
壁面への衝突による、流体の乱流や脈動等の発生を抑制
し、第2絞り部13bにおいて流体をスムーズに通過さ
せることができるので、有利である。With the above-described modified example, the fluid restricted by the second restrictor 13b is supplied to the outlet pipe 1
1 is ejected in a direction inclined with respect to both the axial direction and the radial direction, and the fluid restricted by the second restrictor 13b is discharged from the outlet pipe 1 as in the restrictor of the first embodiment.
As compared with the case of ejecting in the radial direction orthogonal to the axial direction of 1, the cut-out grooves 3 buffer the ejected fluid passing through the second throttle portion 13b and collide with the inner wall surface of the small-diameter portion 6b of the valve port 9. Turbulence, pulsation, and the like of the fluid can be suppressed, and the fluid can be smoothly passed through the second throttle portion 13b, which is advantageous.
【0082】次に、第2実施形態の絞り装置について、
図9及び図10を参照して以下に説明する。Next, the diaphragm device of the second embodiment will be described.
This will be described below with reference to FIGS.
【0083】尚、図9及び図10において、図1乃至図
5と同一の部材、箇所には、それらの図において付した
ものと同一の引用符号を付し、重複部分の説明を省略す
る。In FIGS. 9 and 10, the same members and portions as those in FIGS. 1 to 5 are denoted by the same reference numerals as those in FIGS.
【0084】そして、図9に縦断面図で示す第2実施形
態の絞り装置は、図1に示す第1実施形態の絞り装置に
おける弁ポート9を、大径部6aだけからなる構成に変
え、図10に要部拡大断面図で示すように、大径部6a
の内径を小さくして弁棒1の小径部12bの外径により
近い寸法とし、図3に示す第1実施形態の絞り装置にお
ける接続通路14に対応する、弁棒1の小径部12bの
外周面と弁ポート9の大径部6aの内周面(請求項中の
弁ポートの内周面に相当)とにより形成される部分に、
第1絞り部13aと出口配管11とを連通する第2絞り
部13bを構成した、第1実施形態の別の変形例であ
る。The throttle device according to the second embodiment shown in a longitudinal sectional view in FIG. 9 changes the valve port 9 in the throttle device according to the first embodiment shown in FIG. 1 to a configuration having only the large-diameter portion 6a. As shown in an enlarged sectional view of a main part in FIG.
Of the small diameter portion 12b of the valve stem 1 corresponding to the connection passage 14 in the expansion device of the first embodiment shown in FIG. And a portion formed by the inner peripheral surface of the large diameter portion 6a of the valve port 9 (corresponding to the inner peripheral surface of the valve port in the claims).
This is another modified example of the first embodiment, in which a second throttle unit 13b that connects the first throttle unit 13a and the outlet pipe 11 is configured.
【0085】この第2実施形態の絞り装置によっても、
第1実施形態の絞り装置と同様の効果を得ることができ
る上、弁ポート9に段差を形成する必要がない分だけ、
構造を簡略化することができる。The diaphragm device of the second embodiment also provides
The same effect as that of the throttle device of the first embodiment can be obtained, and further, since there is no need to form a step in the valve port 9,
The structure can be simplified.
【0086】尚、第2実施形態の絞り装置についても第
1実施形態の絞り装置と同じく、弁棒1の大径部12a
と小径部12bとの段差面12cに切り込み溝3を形成
する代わりに、この段差面12cに対向する、弁座2の
うち弁ポート9の大径部6aの先端面部分に切り込み溝
を形成することで、弁棒1と弁座2との間に第1絞り部
が形成されるように構成してもよい。The throttle device of the second embodiment also has a large-diameter portion 12a of the valve stem 1 as in the throttle device of the first embodiment.
Instead of forming the cut groove 3 in the step surface 12c between the small-diameter portion 12b and the small-diameter portion 12b, a cut groove is formed in the distal end surface portion of the large-diameter portion 6a of the valve port 9 of the valve port 2 facing the step surface 12c. Thus, the first throttle portion may be formed between the valve stem 1 and the valve seat 2.
【0087】次に、第3実施形態の絞り装置について、
図11及び図12を参照して以下に説明する。Next, the diaphragm device according to the third embodiment will be described.
This will be described below with reference to FIGS.
【0088】尚、図11及び図12において、図1乃至
図5、及び、図8乃至図10と同一の部材、箇所には、
それらの図において付したものと同一の引用符号を付
し、重複部分の説明を省略する。In FIGS. 11 and 12, the same members and locations as those in FIGS. 1 to 5 and FIGS.
The same reference numerals as those given in those figures are assigned, and the description of the overlapping portions is omitted.
【0089】そして、図11に縦断面図で示す第3実施
形態の絞り装置は、図1に示す第1実施形態の絞り装置
における弁棒1の先端部に、小径部12bに代えて、図
12に要部拡大断面図で示すように、先細りのテーパ面
12e(請求項中の弁棒の先端寄りの外周面部分に相
当)を形成したことと、図1に示す第1実施形態の絞り
装置における弁ポート9の大径部6aの内周縁側の角部
に、テーパ面12eに対応するテーパ面6d(請求項中
の弁ポートの開口縁に位置する弁座部分に相当)を形成
して、このテーパ面6dに断面V字状の切り込み溝3を
形成した点において、第1実施形態の絞り装置とは構成
が異なっている。The throttle device according to the third embodiment shown in the vertical sectional view of FIG. 11 is different from the throttle device of the first embodiment shown in FIG. As shown in an enlarged sectional view of a main part of FIG. 12, a tapered tapered surface 12e (corresponding to an outer peripheral surface portion near the tip of the valve stem in the claims) is formed, and the diaphragm of the first embodiment shown in FIG. A tapered surface 6d corresponding to the tapered surface 12e (corresponding to a valve seat portion located at the opening edge of the valve port in the claims) is formed at a corner on the inner peripheral edge side of the large diameter portion 6a of the valve port 9 in the device. The configuration differs from the aperture device of the first embodiment in that a cut groove 3 having a V-shaped cross section is formed in the tapered surface 6d.
【0090】このように構成された第3実施形態の絞り
装置では、弁棒1の閉弁動作により弁ポート9のテーパ
面6dに弁棒1のテーパ面12eが面接触した状態で、
弁棒1のテーパ面12eと弁ポート9の切り込み溝3と
により第1絞り部13aが形成され、弁棒1の先端面1
2dと、弁ポート9の大径部6a及び小径部6bの段差
面6cとにより第2絞り部13bが形成される。In the throttle device of the third embodiment configured as above, the taper surface 12e of the valve stem 1 comes into surface contact with the tapered surface 6d of the valve port 9 by the valve closing operation of the valve stem 1.
The tapered surface 12e of the valve stem 1 and the cut groove 3 of the valve port 9 form a first throttle portion 13a.
A second throttle portion 13b is formed by 2d and the stepped surface 6c of the large diameter portion 6a and the small diameter portion 6b of the valve port 9.
【0091】また、弁棒1のテーパ面12eと弁ポート
9の大径部6aの内周面とにより、第1絞り部13aと
第2絞り部13bとを連通させる接続通路14が形成さ
れ、これら第1絞り部13a、接続通路14、及び、第
2絞り部13bによって絞り通路が形成されて、この絞
り通路を介して、入口配管10と連通する弁室8と出口
配管11とが、閉弁状態において接続される。The tapered surface 12e of the valve stem 1 and the inner peripheral surface of the large diameter portion 6a of the valve port 9 form a connection passage 14 for communicating the first throttle portion 13a and the second throttle portion 13b. A throttle passage is formed by the first throttle portion 13a, the connection passage 14, and the second throttle portion 13b, and the valve chamber 8 and the outlet pipe 11 communicating with the inlet pipe 10 via the throttle passage are closed. Connected in valve state.
【0092】また、第3実施形態の絞り装置では、上述
した第1絞り部13a、接続通路14、及び、第2絞り
部13bによって形成される絞り通路が、弁棒1の開弁
動作によりなくされる。Further, in the throttle device of the third embodiment, the throttle passage formed by the first throttle portion 13a, the connection passage 14 and the second throttle portion 13b does not occur due to the valve opening operation of the valve rod 1. Is done.
【0093】この第3実施形態の絞り装置によっても、
第1実施形態の絞り装置と同様の効果を得ることができ
る上、弁棒1の先端部に段差を形成する必要がない分だ
け、構造を簡略化することができる。The diaphragm device of the third embodiment also provides
The same effect as that of the throttle device of the first embodiment can be obtained, and the structure can be simplified because there is no need to form a step at the tip of the valve stem 1.
【0094】しかも、第3実施形態に係る絞り装置によ
れば、弁ポート9のテーパ面6dに形成する切り込み溝
3の数や断面積を適宜調整することで、第1絞り部13
a乃至絞り通路全体での絞り量を任意に設定することが
できる。Further, according to the throttle device according to the third embodiment, the number and the cross-sectional area of the cut grooves 3 formed on the tapered surface 6d of the valve port 9 are appropriately adjusted, so that the first throttle portion 13 is formed.
From a to th, the throttle amount in the entire throttle passage can be arbitrarily set.
【0095】尚、弁ポート9のテーパ面6dに切り込み
溝3を形成する代わりに、このテーパ面6dに対向する
弁棒1のテーパ面12eに切り込み溝を形成すること
で、弁棒1のテーパ面12eと弁座2のテーパ面6dと
の間に第1絞り部が形成されるように構成してもよい。By forming a cut groove in the tapered surface 12e of the valve stem 1 facing the tapered surface 6d instead of forming the cut groove 3 in the tapered surface 6d of the valve port 9, the taper of the valve stem 1 is reduced. The first throttle portion may be formed between the surface 12e and the tapered surface 6d of the valve seat 2.
【0096】次に、第4実施形態の絞り装置について、
図13及び図14を参照して以下に説明する。Next, the diaphragm device of the fourth embodiment will be described.
This will be described below with reference to FIGS.
【0097】尚、図13及び図14において、図1乃至
図5、及び、図8乃至図12と同一の部材、箇所には、
それらの図において付したものと同一の引用符号を付
し、重複部分の説明を省略する。In FIGS. 13 and 14, the same members and locations as those in FIGS. 1 to 5 and FIGS.
The same reference numerals as those given in those figures are assigned, and the description of the overlapping portions is omitted.
【0098】そして、図13に縦断面図で示す第4実施
形態の絞り装置は、図12に示す弁棒1先端部のテーパ
面12eを、図14に要部拡大断面図で示すように、弁
棒1の閉弁動作により弁ポート9のテーパ面6dにテー
パ面12eが面接触した状態で、弁ポート9の小径部6
bよりも出口配管11側に延出するように延長し、この
延長されたテーパ面12eとの緩衝を避けるために、弁
ポート9の小径部6bの内周縁側の角部に、テーパ面1
2eに対応するテーパ面6e(請求項中の段差ポート部
に相当)を形成すると共に、このテーパ面6eに臨む弁
棒1のテーパ面12e部分に、弁棒1の周方向に間隔を
おいて、先端面側から座ぐった弁棒1先端部の内部から
テーパ面12eに亘るすり割り状の切り込み溝3´(請
求項中の第2の溝に相当)を、弁棒1の先端面12dか
ら形成した点において、第3実施形態の絞り装置とは構
成が異なっている。The throttle device according to the fourth embodiment shown in the vertical sectional view of FIG. 13 has a tapered surface 12e at the tip end of the valve stem 1 shown in FIG. With the taper surface 12e in surface contact with the tapered surface 6d of the valve port 9 due to the valve closing operation of the valve stem 1, the small diameter portion 6 of the valve port 9 is formed.
In order to avoid buffering with the extended tapered surface 12e, the tapered surface 1 is provided at the corner of the small diameter portion 6b of the valve port 9 on the inner peripheral side.
A tapered surface 6e (corresponding to a stepped port portion in the claims) corresponding to 2e is formed, and the tapered surface 12e of the valve stem 1 facing the tapered surface 6e is spaced apart in the circumferential direction of the valve stem 1. A slit-shaped groove 3 ′ (corresponding to a second groove in the claims) extending from the inside of the distal end portion of the valve stem 1 seated from the distal end surface to the tapered surface 12 e is formed from the distal end surface 12 d of the valve stem 1. The configuration differs from the aperture device of the third embodiment in that it is formed.
【0099】このように構成された第4実施形態の絞り
装置では、弁棒1の閉弁動作により弁ポート9のテーパ
面6d,6eに弁棒1のテーパ面12eが面接触した状
態で、弁棒1のテーパ面12eと弁ポート9の切り込み
溝3とにより第1絞り部13aが形成され、弁棒1の切
り込み溝3´と弁ポート9のテーパ面6eとにより、第
1絞り部13aと出口配管11とを連通する第2絞り部
13bが形成され、これら第1絞り部13a及び第2絞
り部13bによって絞り通路が形成されて、この絞り通
路を介して、入口配管10と連通する弁室8と出口配管
11とが、閉弁状態において接続される。In the throttle device of the fourth embodiment configured as described above, the taper surface 12e of the valve stem 1 comes into surface contact with the tapered surfaces 6d and 6e of the valve port 9 by the valve closing operation of the valve stem 1. A first throttle portion 13a is formed by the tapered surface 12e of the valve stem 1 and the cut groove 3 of the valve port 9, and the first throttle portion 13a is formed by the cut groove 3 'of the valve stem 1 and the tapered surface 6e of the valve port 9. A second throttle portion 13b communicating with the outlet pipe 11 is formed, and a throttle passage is formed by the first throttle portion 13a and the second throttle portion 13b, and communicates with the inlet pipe 10 via the throttle passage. The valve chamber 8 and the outlet pipe 11 are connected in a closed state.
【0100】また、第4実施形態の絞り装置では、上述
した第1絞り部13a及び第2絞り部13bによって形
成される絞り通路が、弁棒1の開弁動作によりなくされ
る。In the throttle device of the fourth embodiment, the throttle passage formed by the first throttle portion 13a and the second throttle portion 13b is eliminated by the valve-opening operation of the valve rod 1.
【0101】この第4実施形態の絞り装置によっても、
第3実施形態の絞り装置と同様の効果を得ることができ
る上、弁棒1の互いに異なる切り込み溝3´と弁ポート
9のテーパ面6eとにより形成される別々の第2絞り部
13bを通過した複数の流体の流れが、その後に弁ポー
ト9の中央部で衝突して乱流を起こすことがないように
することができる。The diaphragm device of the fourth embodiment also provides
The same effect as that of the throttling device of the third embodiment can be obtained, and it passes through the separate second throttling portions 13b formed by the different cut grooves 3 'of the valve stem 1 and the tapered surface 6e of the valve port 9. The flow of the plurality of fluids can be prevented from subsequently colliding at the center of the valve port 9 and causing turbulence.
【0102】しかも、第4実施形態に係る絞り装置によ
れば、弁棒1のテーパ面12eに形成する切り込み溝3
´の数や断面積を適宜調整することで、第2絞り部13
b乃至絞り通路全体での絞り量を任意に設定することが
できる。Further, according to the expansion device according to the fourth embodiment, the cut groove 3 formed in the tapered surface 12e of the valve rod 1 is formed.
By appropriately adjusting the number and cross-sectional area of the second throttle section 13
b to the throttle amount in the entire throttle passage can be arbitrarily set.
【0103】尚、弁ポート9のテーパ面6eに臨む弁棒
1のテーパ面12e部分に切り込み溝3´を形成する代
わりに、図15に要部拡大断面図で示すように、弁ポー
ト9の大径部6a及び小径部6bの段差面6cのうち、
小径部6b側の角部のテーパ面6eに、切り込み溝3″
を形成することで、弁棒1のテーパ面12eと弁座2の
テーパ面6eとの間に第2絞り部13bが形成されるよ
うに構成してもよい。Instead of forming the cut groove 3 ′ in the tapered surface 12 e of the valve stem 1 facing the tapered surface 6 e of the valve port 9, as shown in an enlarged sectional view of the main part of FIG. Of the step surface 6c of the large diameter portion 6a and the small diameter portion 6b,
A notch 3 ″ is formed in the tapered surface 6e at the corner on the side of the small diameter portion 6b.
, The second throttle portion 13b may be formed between the tapered surface 12e of the valve stem 1 and the tapered surface 6e of the valve seat 2.
【0104】そして、図16に要部拡大平面図で示すよ
うに、各実施形態における切り込み溝3,3´,3″の
配置は、出口配管11の軸線に対し軸対称の位置上に複
数に配置するのがよい。さらに、弁ポート9のテーパ面
6dに形成する第1絞り部13aの切り込み溝3の位置
と、弁ポート9のテーパ面6eに形成する第2絞り部1
3bの切り込み溝3″の位置とを、弁棒1の周方向にず
らしたり、切り込み溝3の数や切り込み溝3″の数を各
々変えることもできる。As shown in the enlarged plan view of the main part in FIG. 16, the arrangement of the cut grooves 3, 3 ′, 3 ″ in each embodiment is plurally arranged on a position axially symmetric with respect to the axis of the outlet pipe 11. Further, the position of the cut groove 3 of the first throttle portion 13a formed on the tapered surface 6d of the valve port 9 and the second throttle portion 1 formed on the tapered surface 6e of the valve port 9 are preferable.
The position of the cut groove 3 "of 3b can be shifted in the circumferential direction of the valve stem 1, or the number of cut grooves 3 and the number of cut grooves 3" can be respectively changed.
【0105】尚、図16中の矢印は、入口ポート10か
ら弁室8に流入する流体の流れ方向を示す。The arrow in FIG. 16 indicates the flow direction of the fluid flowing from the inlet port 10 into the valve chamber 8.
【0106】また、図示は省略するが、各実施形態にお
ける切り込み溝3,3´,3″の形状は、既述した断面
半円状や、V字状、矩形状に限らず任意である。Although not shown, the shape of the cut grooves 3, 3 ', 3 "in each embodiment is not limited to the above-described semicircular cross section, V-shape, or rectangular shape, and may be any shape.
【0107】そして、本発明の絞り装置は、冷凍サイク
ルにおける冷媒の絞り用を始め、空気圧回路や水回路
等、流体が流れる流体回路中において流体を絞るための
装置として、広く適用可能であることは言うまでもな
い。The throttle device of the present invention is widely applicable as a device for restricting a fluid in a fluid circuit such as a pneumatic circuit or a water circuit, such as a pneumatic circuit or a water circuit. Needless to say.
【0108】[0108]
【発明の効果】以上詳細に説明したように請求項1に記
載した本発明の絞り装置によれば、第1の通路に連通す
る弁室内に設けた弁棒が、前記弁室と第2の通路との間
に介在された弁ポートの弁座に接触離間する絞り装置に
おいて、前記弁棒と前記弁座とのうちいずれか一方に形
成された溝により、前記弁座と該弁座に接触した前記弁
棒との間に第1の間隙を形成すると共に、前記弁座に接
触した前記弁棒と前記弁ポートとの間に、前記第1の間
隙と連通する第2の間隙を形成して、前記第1の間隙及
び前記第2の間隙により、前記弁室から前記第2の通路
に向かう流体が、前記弁座と前記弁棒とが接触した状態
において段階的に絞られる絞り通路を構成するものとし
た。As described above in detail, according to the throttle device of the first aspect of the present invention, the valve stem provided in the valve chamber communicating with the first passage is provided between the valve chamber and the second valve chamber. In a throttle device that comes into contact with and separates from a valve seat of a valve port interposed between the passage and the valve seat, the groove formed in one of the valve stem and the valve seat contacts the valve seat and the valve seat. Forming a first gap between the valve stem and the valve stem, and a second gap communicating with the first gap between the valve stem and the valve port in contact with the valve seat. The first gap and the second gap allow the fluid flowing from the valve chamber to the second passage to form a throttle passage that is gradually reduced in a state where the valve seat and the valve rod are in contact with each other. It was configured.
【0109】このため、弁棒が弁座に接触するのに伴っ
て、弁棒と弁座とのうちいずれか一方に形成された溝に
より弁棒と弁座との間に形成される第1の間隙と、弁棒
と弁ポートとの間に形成されて第1の間隙と連通する第
2の間隙とにより、弁室と第2の通路との間に連続して
形成される絞り通路により、弁室から第2の通路に向か
う流体を段階的に絞って、絞り通路の全体により大きい
絞り量を得ることができる。Therefore, as the valve stem comes into contact with the valve seat, a first groove formed between the valve stem and the valve seat by a groove formed in one of the valve stem and the valve seat. And a second gap formed between the valve stem and the valve port and communicating with the first gap, by a throttle passage continuously formed between the valve chamber and the second passage. Thus, the fluid flowing from the valve chamber to the second passage is throttled in a stepwise manner, so that a larger throttle amount can be obtained in the entire throttle passage.
【0110】しかも、第1及び第2の各間隙における絞
り量を、絞り通路全体での絞り量に比べて小さい値で済
ますことができることから、流勢の急激な変動による笛
吹き音の発生、増大や、流体の流れに大きな負荷が加わ
ることによる振動音の発生、増大を防ぐことができる。Moreover, since the throttle amount in each of the first and second gaps can be smaller than the throttle amount in the entire throttle passage, generation of whistling noise due to a sudden change in flow force, It is possible to prevent the generation and the increase of the vibration sound due to the increase and the large load applied to the flow of the fluid.
【0111】その上、弁棒が弁座に接触している間、弁
棒と弁座との間に形成される第1の間隙や、弁棒と弁ポ
ートとの間に形成されて第1の間隙と連通する第2の間
隙に、流体中を浮遊するゴミやコンタミ(汚物)等が付
着堆積しても、弁棒の開弁動作をロックさせる事態や流
体通路の閉塞が発生することがなく、また、絞り通路が
第1及び第2の複数の間隙により構成されていることか
ら、絞られた流体の流勢が偏って弁棒に作用する等して
流体の流動音の騒音レベルが増大することがなく、よっ
て、絞り量を大きくするために絞り通路の断面積を小さ
くしても、動作上及び騒音対策上、不都合を生じること
がないようにすることができる。In addition, while the valve stem is in contact with the valve seat, a first gap formed between the valve stem and the valve seat, and a first gap formed between the valve stem and the valve port. Even if dust and contaminants (dirt) floating in the fluid adhere to and accumulate in the second gap communicating with the gap, the situation where the valve stem opening operation is locked or the fluid passage is blocked may occur. In addition, since the throttle passage is formed by the first and second gaps, the noise level of the flow noise of the fluid is reduced by the biased flow of the fluid acting on the valve stem. Therefore, even if the cross-sectional area of the throttle passage is reduced in order to increase the throttle amount, it is possible to prevent inconvenience in operation and noise reduction.
【0112】さらに、弁棒と弁座とのうちいずれか一方
に形成されてこれらの間に第1の間隙を形成する溝の数
や断面積を適宜調整することで、第1の間隙乃至絞り通
路全体での絞り量を任意に設定することができる。Further, by appropriately adjusting the number and the cross-sectional area of the grooves formed in one of the valve stem and the valve seat to form the first gap therebetween, the first gap or the throttle is reduced. The throttle amount in the entire passage can be arbitrarily set.
【0113】また、請求項2に記載した本発明の絞り装
置によれば、前記弁棒に、大径部と該大径部よりも前記
弁棒の先端側に位置する小径部とを設けて、該小径部と
前記大径部との段差部端面が前記弁座に接触するように
前記弁棒を形成し、前記段差部端面と前記弁座とのうち
いずれか一方に前記溝を形成して、前記段差部端面と前
記弁座との間に前記第1の間隙を形成する構成とした。According to the throttling device of the present invention described in claim 2, the valve stem is provided with a large-diameter portion and a small-diameter portion located closer to the distal end of the valve stem than the large-diameter portion. Forming the valve stem such that an end surface of a step portion between the small diameter portion and the large diameter portion comes into contact with the valve seat, and forming the groove in one of the end surface of the step portion and the valve seat. Thus, the first gap is formed between the end face of the step portion and the valve seat.
【0114】このため、弁棒に設けた大径部と小径部と
の段差部端面が弁座に接触した際に、弁座とこの弁座に
接触した弁棒の段差部端面との間に第1の間隙を形成さ
せるために必要な溝を、弁棒の段差部端面又は弁座に対
する切削等の簡単な加工により容易に形成することがで
きる。Therefore, when the stepped end face of the large diameter portion and the small diameter portion provided on the valve stem comes into contact with the valve seat, the gap between the valve seat and the stepped end face of the valve stem in contact with this valve seat is formed. The groove required to form the first gap can be easily formed by a simple process such as cutting the end face of the step portion of the valve stem or the valve seat.
【0115】さらに、請求項3に記載した本発明の絞り
装置によれば、前記弁ポートに、大径ポート部と、該大
径ポート部よりも前記第2の通路側に位置して前記大径
ポート部に連なる小径ポート部とを設けて、前記段差部
端面と前記弁座とが接触した状態において、前記大径ポ
ート部と前記小径ポート部との段差ポート部端面に前記
小径部の先端面が間隔をおいて臨むように前記弁ポート
を形成し、前記段差ポート部端面と前記小径部の先端面
との間に前記第2の間隙を形成する構成とした。Further, according to the throttling device of the present invention, the valve port has a large-diameter port portion, and the large-diameter port portion is located closer to the second passage than the large-diameter port portion. A small-diameter port portion connected to a large-diameter port portion is provided, and in a state where the end surface of the step portion and the valve seat are in contact with each other, the tip of the small-diameter portion is provided at the end surface of the step port portion between the large-diameter port portion and the small-diameter port portion. The valve port is formed so that the surfaces face at an interval, and the second gap is formed between the end surface of the stepped port portion and the front end surface of the small diameter portion.
【0116】このため、弁棒が弁座に接触離間する方向
における、弁棒の小径部の寸法や弁ポートの大径ポート
部の寸法を適宜調整することで、弁棒の段差部端面が弁
座に接触した際に、弁ポートに設けた大径ポート部及び
小径ポート部の段差ポート部端面と弁棒の小径部の先端
面との間に形成される第2の間隙、乃至、絞り通路全体
での絞り量を、任意に設定することができる。Therefore, by appropriately adjusting the dimension of the small diameter portion of the valve stem and the dimension of the large diameter port portion of the valve port in the direction in which the valve stem comes into contact with and separates from the valve seat, the end face of the step portion of the valve stem can be adjusted. A second gap formed between the end surface of the stepped port portion of the large-diameter port portion and the small-diameter port portion provided on the valve port and the distal end surface of the small-diameter portion of the valve rod, The total aperture amount can be set arbitrarily.
【0117】また、請求項4に記載した本発明の絞り装
置によれば、前記小径部の外周面と前記弁ポートの内周
面との間に前記第2の間隙を形成する構成としたので、
弁棒の小径部の外径や弁ポートの内径を適宜調整するこ
とで、弁棒の段差部端面が弁座に接触した際に、弁ポー
トの内周面と小径部の外周面との間に形成される第2の
間隙、乃至、絞り通路全体での絞り量を、任意に設定す
ることができる。According to the throttling apparatus of the present invention, the second gap is formed between the outer peripheral surface of the small diameter portion and the inner peripheral surface of the valve port. ,
By appropriately adjusting the outer diameter of the small diameter portion of the valve stem and the inner diameter of the valve port, when the stepped end face of the valve stem comes into contact with the valve seat, the gap between the inner peripheral surface of the valve port and the outer peripheral surface of the small diameter portion is reduced. The amount of throttle formed in the second gap or the entire throttle passage can be arbitrarily set.
【0118】さらに、請求項5に記載した本発明の絞り
装置によれば、前記弁座のうち前記弁ポートの開口縁に
位置する弁座部分に前記弁棒の外周面のうち該弁棒の先
端寄りの外周面部分が接触するように前記弁棒及び前記
弁座を形成し、前記弁座部分と前記外周面部分とのうち
いずれか一方に前記溝を形成して、前記弁座部分と前記
外周面部分との間に前記第1の間隙を形成する構成とし
た。Further, according to the throttling device of the present invention described in claim 5, the valve seat of the valve stem is provided at the valve seat portion of the valve seat located at the opening edge of the valve port. The valve stem and the valve seat are formed such that an outer peripheral surface portion close to the tip contacts, and the groove is formed in one of the valve seat portion and the outer peripheral surface portion, and the valve seat portion and The first gap is formed between the first gap and the outer peripheral surface.
【0119】このため、弁ポートの開口縁に位置する弁
座部分に弁棒の先端寄りの外周面部分が接触した際に、
弁ポートの開口縁に位置する弁座部分と、この弁座部分
に接触した弁棒の先端寄りの外周面部分との間に第1の
間隙を形成させるために必要な溝を、弁ポートの開口縁
に位置する弁座部分、又は、弁棒の先端寄りの外周面部
分に対する切削等の簡単な加工により容易に形成するこ
とができる。For this reason, when the outer peripheral surface portion near the tip of the valve stem comes into contact with the valve seat portion located at the opening edge of the valve port,
A groove necessary for forming a first gap between the valve seat portion located at the opening edge of the valve port and the outer peripheral surface portion near the distal end of the valve stem in contact with the valve seat portion is formed in the valve port. It can be easily formed by simple processing such as cutting of the valve seat portion located at the opening edge or the outer peripheral surface portion near the tip of the valve stem.
【0120】また、請求項6に記載した本発明の絞り装
置によれば、前記弁ポートに、大径ポート部と、該大径
ポート部よりも前記第2の通路側に位置して前記大径ポ
ート部に連なる小径ポート部とを設けて、前記弁座部分
と前記外周面部分とが接触した状態において、前記大径
ポート部と前記小径ポート部との段差ポート部端面に前
記弁棒の先端面が間隔をおいて臨むように前記弁ポート
を形成し、前記段差ポート部端面と前記弁棒の先端面と
の間に前記第2の間隙を形成する構成とした。According to the throttling device of the present invention, the valve port has a large-diameter port portion, and the large-diameter port portion is located closer to the second passage than the large-diameter port portion. A small-diameter port portion connected to the large-diameter port portion, and in a state where the valve seat portion and the outer peripheral surface portion are in contact with each other, the valve stem is provided on an end surface of a stepped port portion between the large-diameter port portion and the small-diameter port portion. The valve port is formed so that a front end surface faces at an interval, and the second gap is formed between the step surface end surface and the front end surface of the valve rod.
【0121】このため、弁棒が弁座に接触離間する方向
における、弁棒の寸法や弁ポートの大径ポート部の寸法
を適宜調整することで、弁ポートの開口縁に位置する弁
座部分に弁棒の先端寄りの外周面部分が接触した際に、
弁ポートに設けた大径ポート部及び小径ポート部の段差
ポート部端面と、弁棒の先端寄りの外周面部分との間に
形成される第2の間隙、乃至、絞り通路全体での絞り量
を、任意に設定することができる。Therefore, by appropriately adjusting the dimension of the valve stem and the dimension of the large-diameter port portion of the valve port in the direction in which the valve stem contacts and separates from the valve seat, the valve seat portion located at the opening edge of the valve port can be adjusted. When the outer peripheral surface near the tip of the valve stem comes into contact with
A second gap formed between the end surface of the stepped port portion of the large-diameter port portion and the small-diameter port portion provided in the valve port and the outer peripheral surface portion near the tip of the valve stem, or the amount of throttle in the entire throttle passage Can be set arbitrarily.
【0122】さらに、請求項7に記載した本発明の絞り
装置は、前記弁ポートに、大径ポート部と、該大径ポー
ト部よりも前記第2の通路側に位置して前記大径ポート
部に連なる小径ポート部とを設けて、前記弁座部分と前
記外周面部分とが接触した状態において、前記大径ポー
ト部と前記小径ポート部との段差ポート部に前記外周面
部分がさらに接触するように前記弁ポートを形成すると
共に、前記段差ポート部と前記外周面部分とのうちいず
れか一方に形成された第2の溝により、前記段差ポート
部と前記外周面部分との間に前記第2の間隙を形成する
構成とした。In the throttling device according to the present invention, the valve port may include a large-diameter port, and the large-diameter port located closer to the second passage than the large-diameter port. A small-diameter port portion connected to the portion, and in a state where the valve seat portion and the outer peripheral surface portion are in contact with each other, the outer peripheral surface portion further contacts a step port portion between the large-diameter port portion and the small-diameter port portion. And the second port formed in one of the step port portion and the outer peripheral surface portion, the valve port is formed between the step port portion and the outer peripheral surface portion. The second gap is formed.
【0123】このため、弁ポートの段差ポート部と弁棒
の先端寄りの外周面部分とのうちいずれか一方に形成さ
れる第2の溝の数や断面積を適宜調整することで、これ
ら弁棒と弁ポートとの間に形成される第2の間隙、乃
至、絞り通路全体での絞り量を、任意に設定することが
できる。Therefore, by appropriately adjusting the number and the cross-sectional area of the second grooves formed in one of the step port portion of the valve port and the outer peripheral surface portion near the tip of the valve stem. The second gap formed between the rod and the valve port or the throttle amount in the entire throttle passage can be set arbitrarily.
【0124】しかも、弁ポートの開口縁に位置する弁座
部分に弁棒の先端寄りの外周面部分が接触した際に、弁
ポートの段差ポート部と弁棒の先端寄りの外周面部分と
の間に第2の間隙を形成させるために必要な第2の溝
を、弁ポートの段差ポート部、又は、弁棒の先端寄りの
外周面部分に対する切削等の簡単な加工により容易に形
成することができる。In addition, when the outer peripheral surface near the tip of the valve stem comes into contact with the valve seat portion located at the opening edge of the valve port, the gap between the stepped port portion of the valve port and the outer peripheral surface near the tip of the valve stem. A second groove necessary for forming a second gap therebetween is easily formed by a simple processing such as cutting of a stepped port portion of a valve port or an outer peripheral surface portion near a tip end of a valve stem. Can be.
【図1】本発明の第1実施形態に係る絞り装置の開弁時
の縦断面図である。FIG. 1 is a longitudinal sectional view of a throttle device according to a first embodiment of the present invention when a valve is opened.
【図2】図1の絞り装置の閉弁時の縦断面図である。FIG. 2 is a vertical sectional view of the expansion device of FIG. 1 when a valve is closed.
【図3】図1の絞り通路部分の要部拡大断面図である。FIG. 3 is an enlarged sectional view of a main part of a throttle passage portion in FIG. 1;
【図4】図1の絞り装置の閉弁時に絞り通路に詰まりが
生じた状態を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state where the throttle passage is clogged when the throttle device of FIG. 1 is closed.
【図5】図3の絞り通路の詰まりが開弁に伴い解除され
る状態を示す縦断面図である。5 is a longitudinal sectional view showing a state in which the blockage of the throttle passage of FIG. 3 is released with the opening of the valve.
【図6】図1の絞り装置と比較するための1段階の絞り
を持つ絞り装置を示す縦断面図である。FIG. 6 is a longitudinal sectional view showing a diaphragm device having a one-stage diaphragm for comparison with the diaphragm device of FIG. 1;
【図7】気液二相流を絞り装置に流したときに絞り装置
において発生する流動音の騒音レベルと、絞り装置の出
口における流体の流速との関係を実験的に求めた結果を
示すグラフである。FIG. 7 is a graph showing a result obtained by experimentally obtaining a relationship between a noise level of a flow noise generated in the throttle device when a gas-liquid two-phase flow is caused to flow through the throttle device and a fluid flow velocity at an outlet of the throttle device. It is.
【図8】本発明の第1実施形態の変形例に係る絞り装置
の絞り通路部分の要部拡大断面図である。FIG. 8 is an enlarged sectional view of a main part of a throttle passage portion of a throttle device according to a modification of the first embodiment of the present invention.
【図9】本発明の第2実施形態に係る絞り装置の開弁時
の縦断面図である。FIG. 9 is a vertical cross-sectional view of a throttle device according to a second embodiment of the present invention when a valve is opened.
【図10】図9の絞り通路部分の要部拡大断面図であ
る。FIG. 10 is an enlarged sectional view of a main part of a throttle passage portion in FIG. 9;
【図11】本発明の第3実施形態に係る絞り装置の開弁
時の縦断面図である。FIG. 11 is a longitudinal sectional view of a throttle device according to a third embodiment of the present invention when a valve is opened.
【図12】図11の絞り通路部分の要部拡大断面図であ
る。FIG. 12 is an enlarged sectional view of a main part of a throttle passage portion in FIG. 11;
【図13】本発明の第4実施形態に係る絞り装置の開弁
時の縦断面図である。FIG. 13 is a longitudinal sectional view of a throttle device according to a fourth embodiment of the present invention when a valve is opened.
【図14】図13の絞り通路部分の要部拡大断面図であ
る。FIG. 14 is an enlarged sectional view of a main part of a throttle passage portion of FIG.
【図15】本発明の第4実施形態の変形例に係る絞り装
置の絞り通路部分の要部拡大断面図である。FIG. 15 is an enlarged sectional view of a main part of a throttle passage portion of a throttle device according to a modification of the fourth embodiment of the present invention.
【図16】図15の弁座部分の要部拡大平面図である。FIG. 16 is an enlarged plan view of a main part of a valve seat portion of FIG.
1 弁棒 2 弁座 3,3´ 切り込み溝 4 弁ハウジング 6a 大径部(大径ポート部) 6b 小径部(小径ポート部) 6c 段差面(段差ポート部端面) 6d テーパ面(弁ポートの開口縁に位置する弁座部
分) 6e テーパ面(段差ポート部) 8 弁室 9 弁ポート 10 入口配管(第1の通路) 11 出口配管(第2の通路) 12 弁棒 12a 大径部 12b 小径部 12c 段差面(段差部端面) 12d 先端面 12e テーパ面(弁棒の先端寄りの外周面部分) 13a 第1絞り部(第1の間隙) 13b 第2絞り部(第2の間隙) 14 接続通路 31 電磁コイル 32 ガイド 33 プランジャ 34 緩衝材 35 バネ 37 弁ハウジング筒状部DESCRIPTION OF SYMBOLS 1 Valve stem 2 Valve seat 3, 3 'Notch groove 4 Valve housing 6a Large diameter part (large diameter port part) 6b Small diameter part (small diameter port part) 6c Step surface (step surface end surface) 6d Tapered surface (valve port opening) 6e Taper surface (step port portion) 8 Valve chamber 9 Valve port 10 Inlet piping (first passage) 11 Outlet piping (second passage) 12 Valve rod 12a Large diameter portion 12b Small diameter portion 12c Step surface (step end surface) 12d Tip surface 12e Tapered surface (outer peripheral surface portion near the tip of valve stem) 13a First throttle portion (first gap) 13b Second throttle portion (second gap) 14 Connection passage DESCRIPTION OF SYMBOLS 31 Electromagnetic coil 32 Guide 33 Plunger 34 Buffer material 35 Spring 37 Valve housing cylindrical part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 啓夫 茨城県土浦市神立町502番地 株式会社日 立製作所機械研究所内 (72)発明者 大塚 厚 栃木県下都賀郡大平町富田800 株式会社 日立製作所冷熱事業部内 (72)発明者 横山 英範 栃木県下都賀郡大平町富田800 株式会社 日立製作所冷熱事業部内 (72)発明者 小暮 博志 栃木県下都賀郡大平町富田800 株式会社 日立製作所冷熱事業部内 (72)発明者 古牧 久司 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 中島 重利 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 (72)発明者 藤崎 興至 埼玉県狭山市笹井535 株式会社鷺宮製作 所狭山事業所内 Fターム(参考) 3H066 AA01 BA32 BA33 EA15 3H106 DA05 DA13 DA23 DB02 DB12 DB23 DB32 DC02 DC17 DD03 EE20 GB06 GB15 HH03 KK12 KK23 KK34 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroo Nakamura 502, Kandachi-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (72) Atsushi Otsuka 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture Inside the business department (72) Inventor Hidenori Yokoyama 800 Tomita, Ohira-machi, Shimotsuga-gun, Tochigi Prefecture Inside the cooling division of Hitachi, Ltd. Kisa Komaki 535 Sasai, Sayama City, Saitama Prefecture Sagimiya Manufacturing Co., Ltd.Sayama Plant (72) Inventor Shigetoshi Nakajima 535 Sasai, Sayama City, Saitama Prefecture Sagimiya Manufacturing Co., Ltd.Sayama Plant (72) Inventor Koji Fujisaki Sasaki, Saitama Prefecture 535 Sasai, Ichigo Sagimiya Manufacturing Co., Ltd. Sayama Plant F-term (reference) 3H066 AA01 BA32 BA33 E A15 3H106 DA05 DA13 DA23 DB02 DB12 DB23 DB32 DC02 DC17 DD03 EE20 GB06 GB15 HH03 KK12 KK23 KK34
Claims (7)
棒が、前記弁室と第2の通路との間に介在された弁ポー
トの弁座に接触離間する絞り装置において、 前記弁棒と前記弁座とのうちいずれか一方に形成された
溝により、前記弁座と該弁座に接触した前記弁棒との間
に第1の間隙を形成すると共に、 前記弁座に接触した前記弁棒と前記弁ポートとの間に、
前記第1の間隙と連通する第2の間隙を形成して、 前記第1の間隙及び前記第2の間隙により、前記弁室か
ら前記第2の通路に向かう流体が、前記弁座と前記弁棒
とが接触した状態において段階的に絞られる絞り通路を
構成した、ことを特徴とする絞り装置。1. A throttle device wherein a valve stem provided in a valve chamber communicating with a first passage contacts and separates from a valve seat of a valve port interposed between the valve chamber and the second passage. A groove formed in one of the valve stem and the valve seat forms a first gap between the valve seat and the valve stem in contact with the valve seat, and contacts the valve seat. Between the valve stem and the valve port,
A second gap communicating with the first gap is formed. The first gap and the second gap allow a fluid flowing from the valve chamber to the second passage to pass through the valve seat and the valve. A throttle device, comprising a throttle passage that is reduced in a stepwise manner while in contact with a rod.
記弁棒の先端側に位置する小径部とを設けて、該小径部
と前記大径部との段差部端面が前記弁座に接触するよう
に前記弁棒を形成し、前記段差部端面と前記弁座とのう
ちいずれか一方に前記溝を形成して、前記段差部端面と
前記弁座との間に前記第1の間隙を形成した請求項1記
載の絞り装置。2. The valve stem has a large diameter portion and a small diameter portion located closer to the distal end of the valve stem than the large diameter portion, and a stepped end face between the small diameter portion and the large diameter portion is provided. The valve stem is formed so as to be in contact with the valve seat, the groove is formed in one of the step end face and the valve seat, and the groove is formed between the step end face and the valve seat. 2. The aperture device according to claim 1, wherein the first gap is formed.
径ポート部よりも前記第2の通路側に位置して前記大径
ポート部に連なる小径ポート部とを設けて、前記段差部
端面と前記弁座とが接触した状態において、前記大径ポ
ート部と前記小径ポート部との段差ポート部端面に前記
小径部の先端面が間隔をおいて臨むように前記弁ポート
を形成し、前記段差ポート部端面と前記小径部の先端面
との間に前記第2の間隙を形成した請求項2記載の絞り
装置。3. The stepped valve according to claim 1, wherein the valve port is provided with a large-diameter port portion and a small-diameter port portion located on the second passage side of the large-diameter port portion and connected to the large-diameter port portion. The valve port is formed such that a tip end surface of the small-diameter portion faces an end surface of a stepped port portion between the large-diameter port portion and the small-diameter port portion at an interval in a state where the end surface of the small portion contacts the valve seat. 3. The aperture device according to claim 2, wherein the second gap is formed between an end face of the stepped port portion and a tip face of the small diameter portion.
周面との間に前記第2の間隙を形成した請求項2記載の
絞り装置。4. The throttle device according to claim 2, wherein the second gap is formed between an outer peripheral surface of the small diameter portion and an inner peripheral surface of the valve port.
位置する弁座部分に前記弁棒の外周面のうち該弁棒の先
端寄りの外周面部分が接触するように前記弁棒及び前記
弁座を形成し、前記弁座部分と前記外周面部分とのうち
いずれか一方に前記溝を形成して、前記弁座部分と前記
外周面部分との間に前記第1の間隙を形成した請求項1
記載の絞り装置。5. The valve stem and the valve stem such that an outer peripheral surface portion of the valve stem near an end of the valve stem comes into contact with a valve seat portion of the valve seat located at an opening edge of the valve port. The valve seat is formed, and the groove is formed in one of the valve seat portion and the outer peripheral surface portion to form the first gap between the valve seat portion and the outer peripheral surface portion. Claim 1
The squeezing device as described.
径ポート部よりも前記第2の通路側に位置して前記大径
ポート部に連なる小径ポート部とを設けて、前記弁座部
分と前記外周面部分とが接触した状態において、前記大
径ポート部と前記小径ポート部との段差ポート部端面に
前記弁棒の先端面が間隔をおいて臨むように前記弁ポー
トを形成し、前記段差ポート部端面と前記弁棒の先端面
との間に前記第2の間隙を形成した請求項5記載の絞り
装置。6. The valve according to claim 6, wherein the valve port is provided with a large-diameter port portion and a small-diameter port portion located on the second passage side of the large-diameter port portion and connected to the large-diameter port portion. In a state where the seat portion and the outer peripheral surface portion are in contact with each other, the valve port is formed such that a distal end surface of the valve stem faces an end surface of a stepped port portion between the large-diameter port portion and the small-diameter port portion at an interval. 6. The expansion device according to claim 5, wherein the second gap is formed between an end surface of the stepped port portion and a front end surface of the valve stem.
径ポート部よりも前記第2の通路側に位置して前記大径
ポート部に連なる小径ポート部とを設けて、前記弁座部
分と前記外周面部分とが接触した状態において、前記大
径ポート部と前記小径ポート部との段差ポート部に前記
外周面部分がさらに接触するように前記弁ポートを形成
すると共に、前記段差ポート部と前記外周面部分とのう
ちいずれか一方に形成された第2の溝により、前記段差
ポート部と前記外周面部分との間に前記第2の間隙を形
成した請求項5記載の絞り装置。7. The valve according to claim 7, wherein the valve port is provided with a large-diameter port portion and a small-diameter port portion located on the second passage side of the large-diameter port portion and connected to the large-diameter port portion. In a state where the seat portion and the outer peripheral surface portion are in contact with each other, the valve port is formed so that the outer peripheral surface portion further contacts a step port portion between the large-diameter port portion and the small-diameter port portion; 6. The aperture according to claim 5, wherein the second gap is formed between the stepped port portion and the outer peripheral surface portion by a second groove formed in one of the port portion and the outer peripheral surface portion. apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18341999A JP3490640B2 (en) | 1999-06-29 | 1999-06-29 | Aperture device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18341999A JP3490640B2 (en) | 1999-06-29 | 1999-06-29 | Aperture device |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001012825A true JP2001012825A (en) | 2001-01-19 |
JP3490640B2 JP3490640B2 (en) | 2004-01-26 |
Family
ID=16135460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18341999A Expired - Fee Related JP3490640B2 (en) | 1999-06-29 | 1999-06-29 | Aperture device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3490640B2 (en) |
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