JPH0243067B2 - - Google Patents
Info
- Publication number
- JPH0243067B2 JPH0243067B2 JP57201173A JP20117382A JPH0243067B2 JP H0243067 B2 JPH0243067 B2 JP H0243067B2 JP 57201173 A JP57201173 A JP 57201173A JP 20117382 A JP20117382 A JP 20117382A JP H0243067 B2 JPH0243067 B2 JP H0243067B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- pressure
- magnetic fluid
- core member
- magnetic pole
- 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
- 239000011553 magnetic fluid Substances 0.000 claims description 20
- 230000004907 flux Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 6
- 230000005415 magnetization Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】
この発明は気体圧力調整用のリリーフ弁に関
し、殊に磁性流体シールを用いて極く微小な圧力
の調整が可能のリリーフ弁を提供することを目的
とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relief valve for adjusting gas pressure, and in particular, an object of the present invention is to provide a relief valve that allows extremely minute pressure adjustment using a magnetic fluid seal. .
従来のリリーフ弁は、ばね圧を調節することに
よつて設定圧力を調整するものであつた。従がつ
て最低調整圧力は３ないし５Kgｆ／cm2止りであつ
て、１気圧以下のリリーフ圧力を得ることは困難
であつた。 Conventional relief valves adjust the set pressure by adjusting spring pressure. Therefore, the minimum adjustment pressure is only 3 to 5 Kgf/cm 2 , and it has been difficult to obtain a relief pressure of 1 atmosphere or less.
本発明は、ばねを用いずに、磁性流体シールに
よつて回路圧を保持するようにし、所定の圧力以
上の回路圧が加わつた時に上記磁性流体シールが
瞬間的に破断して過圧力を逃すようにすることが
でき、且つ上記所定の圧力値の設定ないし変更が
容易であるとの知見に基くものであつて、１Kg
ｆ／cm2以下の調整は勿論、0.001Kgｆ／cm2という
極く微小圧の調整も可能なリリーフ弁を提供し得
るものである。 The present invention uses a magnetic fluid seal to maintain circuit pressure without using a spring, and when circuit pressure exceeding a predetermined pressure is applied, the magnetic fluid seal momentarily ruptures to release the overpressure. This is based on the knowledge that it is easy to set or change the predetermined pressure value, and the pressure value is 1 kg.
It is possible to provide a relief valve that can not only adjust the pressure below f/cm 2 but also adjust the extremely small pressure of 0.001 Kgf/cm 2 .
以下図示の好適な実施例に基いて本発明を詳細
に説明すると、第１図において、圧力配管より分
岐した分岐管１に本発明の一実施例のリリーフバ
ルブ２のハウジング３が直立するように螺合して
ある。該ハウジングの内径は三段に形成してあ
り、第１段目３１に図示の如く偏心カム９が設け
てある、該カム９はカム軸９１を左右に回動する
ことによつてコア部材５を上下することができ
る。このコア部材５の底部のフランジ状部分５１
は前記ハウジング３の内径二段目３２に上下滑動
自在に嵌入しており、上部５２は円錐台となつて
いて環状の磁極部材６１，６２に対峙している。
尚上記フランジ状部分５１には通気孔５３が穿孔
してある。前記磁極部材６１，６２は永久磁石６
の両磁極端にそれぞれ配設され、且つハウジング
３の三段目内径部分３３に図示の如く装着されて
いる。符号７は蓋であつて天井部は凹面をなし、
エア逃し孔８が穿つてある。該エア逃し孔８の入
口部周囲には更に堰７１を設けてある。前記コア
部材５のテーパ部分５２の外径と永久磁石６及び
磁極部材６１，６２が形成する磁束通路部分には
磁性流体４が封入してあつて該部分をシールして
いる。 The present invention will be described in detail below based on the preferred embodiment shown in the drawings. In FIG. It is screwed together. The inner diameter of the housing is formed in three stages, and the first stage 31 is provided with an eccentric cam 9 as shown in the figure.The cam 9 rotates the cam shaft 91 left and right to rotate the core member 5. can be raised and lowered. A flange-like portion 51 at the bottom of this core member 5
is fitted into the second stage 32 of the inner diameter of the housing 3 so as to be vertically slidable, and the upper part 52 is shaped like a truncated cone and faces the annular magnetic pole members 61 and 62.
Incidentally, the flange-shaped portion 51 is provided with a ventilation hole 53. The magnetic pole members 61 and 62 are permanent magnets 6
, and is attached to the third inner diameter portion 33 of the housing 3 as shown in the figure. Reference numeral 7 is a lid with a concave ceiling.
An air escape hole 8 is provided. A weir 71 is further provided around the entrance of the air escape hole 8. A magnetic fluid 4 is sealed in a magnetic flux path portion formed by the outer diameter of the tapered portion 52 of the core member 5, the permanent magnet 6, and the magnetic pole members 61, 62, thereby sealing the portion.
以上の構成になる本発明のリリーフ弁において
は、先づカム軸９１を回動して偏心カム９によつ
てコア部材５の上下位置を調節して前記磁性流体
シールのギヤツプを調節することによつてシーリ
ング圧を所定の圧力Ptにセツトすると、回路圧
Ｐが上記所定の圧力Ptを超えて高い場合には上
記磁性流体シールが破断し、回路圧力が瞬間的に
解放されて所定の圧力Ptに調整される。このギ
ヤツプの大きさとリリーフ圧Ptとの関係は第４
図に示すように感度が良く、0.001Kgｆ／cm2の調
整も可能である。 In the relief valve of the present invention having the above structure, first, the gap of the magnetic fluid seal is adjusted by rotating the camshaft 91 and adjusting the vertical position of the core member 5 using the eccentric cam 9. Therefore, when the sealing pressure is set to a predetermined pressure Pt, if the circuit pressure P is higher than the predetermined pressure Pt, the magnetic fluid seal breaks, and the circuit pressure is momentarily released to the predetermined pressure Pt. is adjusted to The relationship between the size of this gap and the relief pressure Pt is
As shown in the figure, the sensitivity is good and adjustment of 0.001 Kgf/cm 2 is possible.
尚上記磁性流体シールが破断してエアがエア逃
し孔８から逃げる時に、磁性流体４も該逃し孔か
ら吹き飛ばされて散逸してしまう恐れがある。こ
れを防ぐために蓋７の天井部分は凹面とし、更に
逃し孔８の入口部分には堰７１を設けてあるが、
これに限定するものではない。 Incidentally, when the magnetic fluid seal is broken and air escapes from the air relief hole 8, there is a possibility that the magnetic fluid 4 may also be blown away from the air relief hole and dissipated. To prevent this, the ceiling of the lid 7 is made concave, and a weir 71 is provided at the entrance of the relief hole 8.
It is not limited to this.
第２図に示すものは、本発明の他の実施例であ
つて磁性流体シールのギヤツプは固定とし、磁石
１６が電磁石であり、図示しない公知の電気回路
によつて該電磁石１６に通電する電流密度を変更
することによつて磁力を調節し、磁性流体シール
のシーリング力を調節してリリーフ圧を調整する
ものである。 FIG. 2 shows another embodiment of the present invention in which the gap of the magnetic fluid seal is fixed, the magnet 16 is an electromagnet, and a current is applied to the electromagnet 16 by a known electrical circuit (not shown). The magnetic force is adjusted by changing the density, and the sealing force of the magnetic fluid seal is adjusted to adjust the relief pressure.
尚コア部材１５は磁極部材１２と一体に形成
し、該磁極部材１２、電磁石１６等によつて磁性
流体用のリザーバを形成し、該磁極部材１２にエ
ア逃し孔１８が設けてある。またその入口部分に
は凹面１７及び駒部材１９を設けると磁性流体１
４の散逸を確実に防止することができる。 The core member 15 is formed integrally with the magnetic pole member 12, and the magnetic pole member 12, the electromagnet 16, etc. form a reservoir for magnetic fluid, and the magnetic pole member 12 is provided with an air escape hole 18. Further, if a concave surface 17 and a bridge member 19 are provided at the inlet portion, the magnetic fluid 1
4 can be reliably prevented from dissipating.
第３図に示したものは、リリーフ圧力が固定の
ものの実施例であつて、且つ横置きに使用したも
のである。 The one shown in FIG. 3 is an embodiment in which the relief pressure is fixed and is used in horizontal placement.
図においてハウジング２３にコア部材２５と永
久磁石２６及び磁極部材２１，２２が所定のシー
ルギヤツプを形成するように図示の如く装着して
あり、エア逃し孔２８を有する蓋部材２７が協働
して磁性流体２４のリザーバを構成している。上
記磁性流体２４は所定の磁化特性を有するものと
し、前記コア部材２５の外周円筒部を所定のシー
リング力でシールしている。従がつてリリーフ圧
力はこのシーリング力に見合つた一定のものとな
つている。 In the figure, a core member 25, a permanent magnet 26, and magnetic pole members 21 and 22 are attached to a housing 23 so as to form a predetermined seal gap, and a cover member 27 having an air release hole 28 cooperates with the magnetic It constitutes a reservoir for fluid 24. The magnetic fluid 24 has a predetermined magnetization characteristic, and seals the outer cylindrical portion of the core member 25 with a predetermined sealing force. Therefore, the relief pressure remains constant commensurate with this sealing force.
叙上の説明によつて明らかな通り、本発明のリ
リーフ弁は磁性流体シールのシーリング力が、シ
ールギヤツプや磁界の大きさ、磁性流体の磁化特
性等に対して一定の関係があり、且つこれらを変
化させることによつて敏感に調節し得るとの知見
に基いて発明されたものであつて、空圧装置にお
ける微小な気体圧力を感度良く調整することを可
能とするものである。 As is clear from the above explanation, in the relief valve of the present invention, the sealing force of the magnetic fluid seal has a certain relationship with the seal gap, the magnitude of the magnetic field, the magnetization characteristics of the magnetic fluid, etc. This was invented based on the knowledge that it can be sensitively adjusted by changing the air pressure, and makes it possible to sensitively adjust minute gas pressures in pneumatic devices.
第１図は本発明の一実施例を示す縦断面図、第
２図及び第３図はそれぞれ他の実施例を示す断面
図、第４図は磁性流体シールのギヤツプとリリー
フ圧との関係を示す線図である。
符号の説明、４，１４，２４……磁性流体、
５，１５，２５……コア部材、６，２６……永久
磁石、１６……電磁石、１２，２１，２２，６
１，６２……磁極部材、８，１８，２８……エア
逃し孔。
FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIGS. 2 and 3 are sectional views showing other embodiments, and FIG. 4 shows the relationship between the gap and relief pressure of a magnetic fluid seal. FIG. Explanation of symbols, 4, 14, 24...magnetic fluid,
5, 15, 25... Core member, 6, 26... Permanent magnet, 16... Electromagnet, 12, 21, 22, 6
1, 62...Magnetic pole member, 8, 18, 28...Air escape hole.
Claims (1)
て、柱状のコア部材と、 該コア部材を囲む磁石と、 該磁石の両磁極端に配設された環状の磁極部材
と、 該磁極部材の内周面とコア部材の間のシールギ
ヤツプでかつコア部材・磁石・磁極部材が形成す
る磁束通路に磁性流体シールを構成するように封
入された磁性流体と、 該磁性流体の散逸を防止するべく設けたリザー
バとを有することを特徴とするリリーフ弁。[Claims] 1. A relief valve for setting gas pressure, comprising: a columnar core member, a magnet surrounding the core member, and annular magnetic pole members disposed at both pole ends of the magnet. , a magnetic fluid sealed in a seal gap between the inner peripheral surface of the magnetic pole member and the core member so as to constitute a magnetic fluid seal in a magnetic flux path formed by the core member, the magnet, and the magnetic pole member; and dissipation of the magnetic fluid. A relief valve characterized in that it has a reservoir provided to prevent this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20117382A JPS5993578A (en) | 1982-11-18 | 1982-11-18 | Relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20117382A JPS5993578A (en) | 1982-11-18 | 1982-11-18 | Relief valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5993578A JPS5993578A (en) | 1984-05-30 |
| JPH0243067B2 true JPH0243067B2 (en) | 1990-09-27 |
Family
ID=16436567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20117382A Granted JPS5993578A (en) | 1982-11-18 | 1982-11-18 | Relief valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5993578A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6131709A (en) * | 1997-11-25 | 2000-10-17 | Lord Corporation | Adjustable valve and vibration damper utilizing same |
| CN105180483A (en) * | 2015-10-10 | 2015-12-23 | 广西广拓新能源科技有限公司 | Heat-preservation water pipe |
| CN108488452B (en) * | 2018-06-26 | 2019-11-05 | 扬州市品冠体育用品有限公司 | A kind of gasification method of industry petroleum liquid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58672A (en) * | 1981-06-25 | 1983-01-05 | Kiyuubitsuku Eng:Kk | Safety valve device |
-
1982
- 1982-11-18 JP JP20117382A patent/JPS5993578A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58672A (en) * | 1981-06-25 | 1983-01-05 | Kiyuubitsuku Eng:Kk | Safety valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5993578A (en) | 1984-05-30 |
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