JPH0326303B2 - - Google Patents
Info
- Publication number
- JPH0326303B2 JPH0326303B2 JP60019864A JP1986485A JPH0326303B2 JP H0326303 B2 JPH0326303 B2 JP H0326303B2 JP 60019864 A JP60019864 A JP 60019864A JP 1986485 A JP1986485 A JP 1986485A JP H0326303 B2 JPH0326303 B2 JP H0326303B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- port
- needle valve
- needle
- electric control
- 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.)
- Expired - Lifetime
Links
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は冷凍装置の電動式膨脹弁等として用い
られる電動式コントロールバルブに関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric control valve used as an electric expansion valve of a refrigeration system.
従来の技術
従来における此種のコントロールバルブは、実
開昭59−92263号公報に示される如くに、ニード
ル弁の円錐状周面を弁座に接離させて流路の制御
を行ない、該円錐状周面の形状を変化させて流量
特性を変化させるようにしている。Conventional technology As shown in Japanese Utility Model Application Publication No. 59-92263, this kind of control valve in the past controls the flow path by bringing the conical peripheral surface of the needle valve into contact with and away from the valve seat. The flow characteristics are changed by changing the shape of the circumferential surface.
発明が解決しようとする問題点
上記従来の技術にあつては、ニードル弁が接離
する弁座に対して精度加工を施す必要があり、ま
た電動装置としてのステツピングモータのトルク
が小さいので、弁閉止時においてニードル弁体が
弁座に対して喰い込みを生じないように特に対策
を講ずる必要があつた。Problems to be Solved by the Invention In the above conventional technology, it is necessary to perform precision machining on the valve seat on which the needle valve approaches and separates, and the torque of the stepping motor as an electric device is small. It was necessary to take special measures to prevent the needle valve body from biting into the valve seat when the valve was closed.
本発明は上記した点に着目して為されたもので
あり、弁体が弁口に対して喰い込みを生じないよ
うにすると共に、流量特性を弁口の形状によつて
設定するようにしたものである。 The present invention has been made with attention to the above-mentioned points, and it is possible to prevent the valve body from biting into the valve port, and to set the flow rate characteristics by the shape of the valve port. It is something.
問題点を解決するための手段
上記の目的を達成するため、本発明において
は、モータで弁体を作動させる電動式コントロー
ルバルブにおいて、一次口と二次口間の隔壁にお
いて円形横穴に直交して形成されて、３次元曲線
の端部を有する弁口を形成し、ニードル弁に対し
て制御用円錐状周面部に続いて該弁口と略一致す
る外径の直上摺動部を設ける構成を採用した。Means for Solving the Problems In order to achieve the above object, in the present invention, in an electric control valve in which a valve body is actuated by a motor, a circular horizontal hole is perpendicular to a partition wall between a primary port and a secondary port. The needle valve is configured to form a valve port having a three-dimensional curved end, and to provide the needle valve with a sliding portion immediately above the control conical circumferential surface portion and having an outer diameter that substantially coincides with the valve port. Adopted.
実施例
本発明にかかる電動式コントロールバルブは、
バルブ部Ｖとステツピングモーター部Ｍより成
る。バルブ部Ｖにおいて、弁本体１の一次口１ａ
と二次口１ｂ間の隔壁２に弁口２ａが設けられ、
該弁口２ａに対してニードル弁３が進退するもの
で、該ニードル弁３は該二次口１ｂ側において弁
本体１に螺着された雄螺子管４内において軸方向
に摺動自在に支持されている。Embodiment The electric control valve according to the present invention includes:
It consists of a valve part V and a stepping motor part M. In the valve part V, the primary port 1a of the valve body 1
A valve port 2a is provided in the partition wall 2 between the and the secondary port 1b,
A needle valve 3 moves forward and backward with respect to the valve port 2a, and the needle valve 3 is supported slidably in the axial direction within a male screw tube 4 screwed onto the valve body 1 on the side of the secondary port 1b. has been done.
弁本体１の上部には雄螺子管４を中心にした状
態において下蓋５が設けられ、該下蓋５上にステ
ツピングモーター部Ｍにおける密閉型ケース６が
固定される。ケース６の外周部にはコイル７を内
蔵したステータ８が設けられる。ケース６内にお
いてロータ９が上記雄螺子管４により回動自在に
支持して設けられる。ロータ９は支持筒１０の外
周部に同じく筒状の永久磁石１１を嵌合してから
上縁部１０ａを該永久磁石１１上に拡開して両者
を一体化したものであり、支持筒１０の内側下方
に嵌合固定した雌螺子管１２を前記雄螺子管４に
螺合して回動且つ軸方向に移動可能に設けられて
いる。 A lower cover 5 is provided on the upper part of the valve body 1 with the male screw tube 4 in the center, and a closed case 6 of the stepping motor section M is fixed onto the lower cover 5. A stator 8 having a built-in coil 7 is provided on the outer periphery of the case 6. A rotor 9 is rotatably supported within the case 6 by the male threaded tube 4. The rotor 9 is constructed by fitting a cylindrical permanent magnet 11 to the outer circumference of a support tube 10, and then expanding the upper edge 10a onto the permanent magnet 11 to integrate the two. A female threaded tube 12 is fitted and fixed to the lower inside of the male threaded tube 4 and is screwed onto the male threaded tube 4 so as to be rotatable and movable in the axial direction.
支持筒１０内の軸方向の中間部には連結壁１０
ｂが形成され、その孔１０ｃにニードル弁３の小
径部３ａを挿通した後Ｅリング１３にて止着して
いる。ニードル弁３の小径部３ａには圧着コイル
バネ１４がその段部３ｂと連結壁１０ｂとの間に
おいて捲装されている。 A connecting wall 10 is provided in the axially intermediate portion of the support tube 10.
b is formed, and after the small diameter portion 3a of the needle valve 3 is inserted into the hole 10c, it is fixed with an E ring 13. A compression coil spring 14 is wound around the small diameter portion 3a of the needle valve 3 between the stepped portion 3b and the connecting wall 10b.
ロータ９の上部において、ケース６に止着した
心棒１５に螺旋状案内リング１６が捲着され、該
螺旋状案内リング１６に対してスライダー１７が
回動且つ上下動自在に係合しており、該スライダ
ー１７の外端はロータ９に立設した係止杆１８に
係合している。ステータ８のコイル７に通電する
とロータ９が回転し、ロータ９の回転に応じてス
ライダー１７が螺旋状案内リング１６に沿つて上
下動し、その上下端１６ａ，１６ｂに衝合した位
置でロータ９の回動並びにニードル弁３の移動を
停止する。 In the upper part of the rotor 9, a spiral guide ring 16 is wound around a shaft 15 fixed to the case 6, and a slider 17 is engaged with the spiral guide ring 16 so as to be rotatable and vertically movable. The outer end of the slider 17 engages with a locking rod 18 erected on the rotor 9. When the coil 7 of the stator 8 is energized, the rotor 9 rotates, and the slider 17 moves up and down along the spiral guide ring 16 in accordance with the rotation of the rotor 9. The rotation of the needle valve 3 and the movement of the needle valve 3 are stopped.
ニードル弁３は端部において先端を切断した形
状の流量制御用円錐状周面部３ｃを有し、これに
続いて外径が弁口２ａの口径を略一致する直状摺
動部３ｄを有している。ニードル弁３は弁閉時に
おいて、第１図に示される如く、直状摺動部３ｄ
が弁口２ａ内に深く進入することにより弁漏れを
小さくしている。 The needle valve 3 has a conical peripheral surface portion 3c for flow rate control with a cut-off tip at its end, and a straight sliding portion 3d whose outer diameter substantially matches the diameter of the valve port 2a. ing. When the needle valve 3 is closed, as shown in FIG.
By entering deeply into the valve port 2a, valve leakage is reduced.
ニードル弁３の中心部には端部から軸方向に延
長して弁本体１の摺動孔１ｃ内において開口する
均圧孔３ｅが形成されており、これによつて一次
口１ａと二次口１ｂ間における差圧がニードル弁
３に及ぼす力を小さくしている。 A pressure equalizing hole 3e is formed in the center of the needle valve 3, extending in the axial direction from the end and opening in the sliding hole 1c of the valve body 1. The force exerted on the needle valve 3 by the pressure difference between the valves 1b and 1b is reduced.
弁口２ａは２次口１ｂを形成する円形横穴１ｄ
に対して直交するような円形の縦穴として形成さ
れており、弁口２ａの端部において中グリ等の加
工を施して弁座を形成しないので、弁口２ａの端
部２a1は円形の横穴と縦穴の交叉部から構成され
て３次元的な曲線となつており（第２図イ，ロ）
これによつて流量特性は第３図の如くにゆるやか
に変化する。 The valve port 2a is a circular horizontal hole 1d forming a secondary port 1b.
The end of the valve port 2a is formed as a circular vertical hole perpendicular to the hole, and since the end of the valve port 2a is not processed by boring or the like to form a valve seat, the end 2a1 of the valve port 2a is a circular horizontal hole. It is composed of the intersection of the vertical hole and the vertical hole, forming a three-dimensional curve (Figure 2 A and B).
As a result, the flow rate characteristics change gradually as shown in FIG.
従来においては、第４図に示される如く、横穴
１d′に直交する弁口２a′の端部に円形の弁座２
b′を形成するために中グリ加工２c′を施す必要が
あつたのに対し、本発明においてはかかる工程を
省くことができる。 Conventionally, as shown in FIG. 4, a circular valve seat 2 is provided at the end of the valve port 2a' that is perpendicular to the side hole 1d'.
Whereas it was necessary to perform a boring process 2c' to form b', this step can be omitted in the present invention.
本発明は上記した如くに、モータで弁体を作動
させる電動式コントロールバルブにおいて、一次
口と二次口間の隔壁において円形横穴に直交して
形成されて、３次元曲線の端部を有する弁口を形
成し、ニードル弁に対して制御用円錐状周面部に
続いて該弁口と略一致する外径の直状摺動部を設
て成るものであるから、弁閉止時においてニード
ル弁体が噛み込みを生じないものであり、またゆ
るやかに変化する流量特性を得ることができる。 As described above, the present invention relates to an electric control valve in which a valve body is actuated by a motor, which is formed perpendicularly to a circular horizontal hole in a partition wall between a primary port and a secondary port, and has a three-dimensional curved end. Since the needle valve is provided with a conical peripheral surface portion for control and a linear sliding portion having an outer diameter that substantially matches the valve port, the needle valve body This does not cause jamming, and it is possible to obtain flow characteristics that change slowly.
第１図は本発明の一実施例についての縦断面
図、第２図イは横穴と弁口を形成する縦穴との連
結部の断面図、第２図ロは同上の−線断面
図、第３図は本発明の流量特性図、第４図は従来
における弁口部分の断面図である。
１…弁本体、１ａ…一次口、１ｂ…二次口、１
ｄ…円形横穴、２…隔壁、２ａ…弁口、２a1…端
部、３…ニードル弁、３ｃ…制御用円錐状周面
部、３ｄ…直状摺動部。
FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, FIG. FIG. 3 is a flow characteristic diagram of the present invention, and FIG. 4 is a sectional view of a conventional valve port portion. 1...Valve body, 1a...Primary port, 1b...Secondary port, 1
d...Circular horizontal hole, 2...Partition wall, 2a...Valve port, 2a1 ...End part, 3...Needle valve, 3c...Conical peripheral surface part for control, 3d...Straight sliding part.
Claims (1)
ルバルブにおいて、一次口と二次口間の隔壁にお
いて円形横穴に直交して形成されて３次元曲線の
端部を有する弁口を形成し、ニードル弁に対して
制御用円錐状周面部に続いて該弁口と略一致する
外径の直状摺動部を設けて成ることを特徴とする
電動式コントロールバルブ。1. In an electric control valve whose valve body is operated by a motor, a valve port is formed perpendicularly to a circular horizontal hole in the partition wall between the primary port and the secondary port and has a three-dimensional curved end, and a needle valve is used. On the other hand, an electric control valve characterized in that a straight sliding part having an outer diameter that substantially coincides with the valve opening is provided following the conical peripheral surface part for control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986485A JPS61180077A (en) | 1985-02-06 | 1985-02-06 | Motor-driven control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986485A JPS61180077A (en) | 1985-02-06 | 1985-02-06 | Motor-driven control valve |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6379389A Division JPH0242286A (en) | 1989-03-17 | 1989-03-17 | electric control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61180077A JPS61180077A (en) | 1986-08-12 |
| JPH0326303B2 true JPH0326303B2 (en) | 1991-04-10 |
Family
ID=12011083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986485A Granted JPS61180077A (en) | 1985-02-06 | 1985-02-06 | Motor-driven control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61180077A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10160023A (en) * | 1996-11-28 | 1998-06-16 | Pacific Ind Co Ltd | Motor operated valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081343U (en) * | 1996-04-01 | 1996-09-03 | 株式会社クボタ | Operating cabin structure of reaper harvester |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59101073U (en) * | 1982-12-27 | 1984-07-07 | 太平洋工業株式会社 | Needle valve structure of proportional control valve |
| JPS608583A (en) * | 1983-06-17 | 1985-01-17 | Saginomiya Seisakusho Inc | stepping motor valve |
-
1985
- 1985-02-06 JP JP1986485A patent/JPS61180077A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10160023A (en) * | 1996-11-28 | 1998-06-16 | Pacific Ind Co Ltd | Motor operated valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61180077A (en) | 1986-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |