JPH02125182A - Relief valve - Google Patents
Relief valveInfo
- Publication number
- JPH02125182A JPH02125182A JP27990388A JP27990388A JPH02125182A JP H02125182 A JPH02125182 A JP H02125182A JP 27990388 A JP27990388 A JP 27990388A JP 27990388 A JP27990388 A JP 27990388A JP H02125182 A JPH02125182 A JP H02125182A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- pressure
- oil
- piston
- hole
- 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.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 239000000314 lubricant Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 38
- 239000010687 lubricating oil Substances 0.000 description 14
- 230000008602 contraction Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、エンジンの潤滑油等の油圧回路に用いる調圧
弁に関し、油圧調整を精度良く行うことができる調圧弁
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure regulating valve used in a hydraulic circuit for lubricating oil of an engine, and more particularly to a pressure regulating valve that can accurately adjust hydraulic pressure.
（従来技術〕
第５図に示すごとく、エンジン等の潤滑部９に潤滑油８
を循環供給する油圧回路においては、ｙＡ圧圧子７用い
て油圧調整を行う、なお、同図において、符号６２はオ
イルパン、６３はオイルポンプ、６１はオイルクリーナ
である。(Prior art) As shown in FIG.
In the hydraulic circuit that circulates and supplies oil, the hydraulic pressure is adjusted using the YA pressure indenter 7. In the figure, reference numeral 62 is an oil pan, 63 is an oil pump, and 61 is an oil cleaner.
上記調圧弁７は、第６図〜第８図に示すごとく。The pressure regulating valve 7 is as shown in FIGS. 6 to 8.
上記油圧回路に接続するシリンダ１と、該シリンダｌ内
を摺動するピストン２と、該ピストン２とシリンダ１の
底部１３との間に介設した圧力調整用バネ３と、上記シ
リンダの側壁１１に設けた油逃がし穴１２とよりなる。A cylinder 1 connected to the hydraulic circuit, a piston 2 sliding inside the cylinder l, a pressure adjustment spring 3 interposed between the piston 2 and the bottom 13 of the cylinder 1, and a side wall 11 of the cylinder It consists of an oil relief hole 12 provided in.
ψ
しかして、油圧が設定圧より低い場合においては１回路
中の潤滑油がバネ３の反発力に抗してピストン２を押し
下げることができず、第６図に示すごとく、調圧弁は閉
止状態にある。ψ However, when the oil pressure is lower than the set pressure, the lubricating oil in one circuit cannot push down the piston 2 against the repulsive force of the spring 3, and the pressure regulating valve is closed as shown in Fig. 6. It is in.
一方、油圧が設定圧よりも極めて高くなった場合におい
ては、バネ３の反発力に抗して、第７図に示すごとく、
ピストン２が直ちに最下部まで押し下げられる。それ故
、高圧となった潤滑油８は拙速がし穴１２をＥ方向に通
過して、油圧調整が行われる。On the other hand, when the oil pressure becomes much higher than the set pressure, as shown in FIG.
Piston 2 is immediately pushed down to the lowest position. Therefore, the high-pressure lubricating oil 8 passes through the bleed hole 12 in the E direction, and the oil pressure is adjusted.
また、油圧が若干高くなった場合には、第８図に示すご
とく、拙速がし穴１２の一部をピストン２が塞いだ状態
で、潤滑油８はＥ方向に通過し油圧調整が行われる。Furthermore, when the oil pressure becomes slightly high, as shown in Fig. 8, the lubricating oil 8 passes in the E direction with the piston 2 blocking a part of the bleed hole 12, and the oil pressure is adjusted. .
上記より知られるごと＜、ｔＪＲ圧弁子弁７定圧力は、
ピストン２の頂部が拙速し穴に達し、油が流出し始める
ときの、バネ３の反発力に等しい。なお、正確には、ピ
ストン２とシリンダ１との摺動抵抗等も考慮すべきであ
る。As is known from the above, tJR pressure valve 7 constant pressure is:
It is equal to the repulsive force of the spring 3 when the top of the piston 2 reaches the hole prematurely and oil begins to flow out. In addition, to be precise, the sliding resistance between the piston 2 and the cylinder 1, etc. should also be taken into consideration.
しかしながら、上記従来の調圧弁７は、バネ３の反発力
、付勢力が一定であるため、潤滑油の温度が変化したと
きには、その油圧調整に限界がある。However, in the conventional pressure regulating valve 7, since the repulsive force and biasing force of the spring 3 are constant, there is a limit to the oil pressure adjustment when the temperature of the lubricating oil changes.
即ち、油温に変化が生じた場合、！Ｐ！圧弁の作動油圧
は一定であるが、油圧回路を経た潤滑部９において油圧
が変化するのが問題となる。つまり。In other words, if there is a change in oil temperature,! P! Although the operating oil pressure of the pressure valve is constant, the problem is that the oil pressure changes in the lubricating section 9 via the hydraulic circuit. In other words.
調圧弁作動圧が例えば５ ｋｇ ／ ｃＪの場合、潤滑
部９（エンジンにおいてはメインオイルホール）におい
て、油温が２０″Ｃで油圧が５ ｋｇ／ｄであったとす
ると、油温が１２０℃になると油圧は３ｋｇ／ｃ＋ａと
なってしまう、そのため、潤滑部９における油圧を一定
にするため、温度により調圧弁設定圧を補正する必要が
ある。If the pressure regulating valve operating pressure is, for example, 5 kg/cJ, and the oil temperature is 20"C and the oil pressure is 5 kg/d in the lubricating section 9 (main oil hole in the engine), the oil temperature will reach 120°C. Then, the oil pressure becomes 3 kg/c+a. Therefore, in order to keep the oil pressure in the lubricating section 9 constant, it is necessary to correct the pressure regulating valve set pressure according to the temperature.
本発明は、かかる従来の調圧弁の問題点に鑑みてなされ
たもので、油温に変化を生じても油圧調整を精度良く行
うことができる。調圧弁を提供しようとするものである
。The present invention was devised in view of the problems of conventional pressure regulating valves, and enables accurate oil pressure adjustment even when oil temperature changes. The aim is to provide a pressure regulating valve.
本発明は、油圧回路に接続する第１シリンダと。 The present invention includes a first cylinder connected to a hydraulic circuit.
該第１シリンダ内を摺動するピストンと、該ピストンと
第１シリンダ底部との間に介設した圧力調整用バネと、
上記第１シリンダ側壁に設けた拙速がし穴とよりなる調
圧弁において、上記第１シリンダの側壁内にはサーモワ
ックスを収納したサーモワックス室を設けると共に、上
記第１シリンダとピストンとの間には上記サーモワック
スの膨張収縮によって往復動する第２シリンダを設け、
該第２シリンダはその下方に拙速がし用の貫通孔を有す
ることを特徴とする調圧弁にある。a piston sliding within the first cylinder; a pressure adjustment spring interposed between the piston and the bottom of the first cylinder;
In the pressure regulating valve, which is formed of a bleed hole provided in the side wall of the first cylinder, a thermowax chamber containing thermowax is provided in the sidewall of the first cylinder, and a thermowax chamber containing thermowax is provided between the first cylinder and the piston. is provided with a second cylinder that reciprocates according to the expansion and contraction of the thermowax,
The pressure regulating valve is characterized in that the second cylinder has a through hole below the second cylinder for releasing the pressure.
本発明において、上記サーモワックスとは、温度の変化
に応じて体積が膨張収縮する油類等の液体を総称するも
のである。また、上記第２シリンダとは ｉＰｉ圧弁圧
体本体ての第１シリンダと上記ピストンとの間をサーモ
ワックスの膨張収縮によって往復動するよう配設したも
のをいう、上記ピストンは、油圧回路の圧力調整のため
に、該第２シリンダ内を往復動する。In the present invention, the thermowax is a general term for liquids such as oils whose volume expands and contracts in response to changes in temperature. The second cylinder is one that is arranged to reciprocate between the first cylinder of the iPi pressure valve pressure body body and the piston by the expansion and contraction of the thermowax. For adjustment, it reciprocates within the second cylinder.
また、該第２シリンダにはその下方に拙速がし用の貫通
孔が配設されている。該貫通孔は、上記豐
第１シリンダの拙速がし穴と同じ大きさ或いはこれより
も小さい孔とすることができる。なお１本発明にかかる
調圧弁はエンジンの潤滑油回路に限ることなく、各種油
圧回路に適用することができる。Further, the second cylinder is provided with a through hole below it for quick release. The through hole may be of the same size as or smaller than the punch hole of the first cylinder. Note that the pressure regulating valve according to the present invention is not limited to the lubricating oil circuit of an engine, and can be applied to various hydraulic circuits.
本発明にかかる調圧弁は、ピストンが第２シリンダ内を
摺動することにより油圧調整を行う。そして、ピストン
頂部が第２シリンダの下方の拙速がし用の貫通孔に達し
たときに、咳貢通孔及び第１シリンダの拙速がし穴より
油を逃がし、減圧作動を行う、それ故、調圧弁の設定圧
力（作動圧力）は、主としてピストンが圧力画整用バネ
に抗して油圧により押し下げられ、その頂部が上記貫通
孔に達したときのバネの反発力に等しい。The pressure regulating valve according to the present invention adjusts the hydraulic pressure by having the piston slide within the second cylinder. When the top of the piston reaches the through-hole in the lower part of the second cylinder, the oil is released from the through-hole and the through-hole in the first cylinder to perform a depressurization operation. The set pressure (operating pressure) of the pressure regulating valve is mainly equal to the repulsive force of the spring when the piston is pushed down by hydraulic pressure against the pressure regulating spring and its top reaches the through hole.
したがって、同じバネを用いた場合、該バネが圧縮され
る程、つまりピストン頂部が最上端の非作動位置から上
記貫通孔に達するまでのストローク（第２ｒｊ！ＪのＳ
ｔ）が長くなる程、設定圧力は高くなる。Therefore, when using the same spring, the more the spring is compressed, that is, the stroke until the top of the piston reaches the through hole from the uppermost non-operating position (S of the second rj!
The longer t), the higher the set pressure.
しかして９本発明においては、油温が高くなるとサーモ
ワックスが膨張して、第２シリンダを下降させる。その
結果、上記貫通孔が下降し、ピストンの前記ストローク
が長くなる（第４図Ｓ２）。However, in the present invention, when the oil temperature increases, the thermowax expands and lowers the second cylinder. As a result, the through hole moves downward and the stroke of the piston becomes longer (S2 in FIG. 4).
そのため、油圧増加に伴って貫通孔より油を逃がそうと
ピストンが下降するが、ピストンは低温の場合に比して
圧力調整用バネをより多（圧縮する必要が生ずる。つま
り、設定圧力が高くなる。Therefore, as the oil pressure increases, the piston descends to release oil from the through hole, but the piston needs to compress the pressure adjustment spring more than it would at a low temperature.In other words, the set pressure It gets expensive.
〔効 果］
上記のごとく１本発明によれば、油温が変化しても精度
良（圧力調整を行うことができる。また温度変化に伴う
設定圧力の調整は、サーモワックス及び第２シリンダに
よって自動的に行うことができる。[Effects] As described above, according to the present invention, even if the oil temperature changes, it is possible to perform accurate (pressure) adjustment.Also, the set pressure can be adjusted in accordance with temperature changes by thermowax and the second cylinder. It can be done automatically.
［実施例］
本発明の実施例にかかる調圧弁につき、第１図〜第４図
を用いて説明する。[Example] A pressure regulating valve according to an example of the present invention will be described with reference to FIGS. 1 to 4.
即ち１本例の調圧弁は、第１図に示すごとく油圧回路に
接続する第１シリンダ１と、該第１シリンダ１内を摺動
する第２シリンダ５と、該第２シリンダ５内を摺動する
ピストン２と、該ピストン２とシリンダ１の底部１３と
の間に介設した圧力調整用バネ３と、上記第１シリンダ
側壁１１に設けた油逃がし穴１２とよりなる。That is, as shown in FIG. 1, the pressure regulating valve of this example includes a first cylinder 1 connected to a hydraulic circuit, a second cylinder 5 that slides inside the first cylinder 1, and a second cylinder 5 that slides inside the second cylinder 5. It consists of a moving piston 2, a pressure adjusting spring 3 interposed between the piston 2 and the bottom 13 of the cylinder 1, and an oil relief hole 12 provided in the first cylinder side wall 11.
また、上記第１シリンダ１の側壁１１内にはサーモワッ
クス室４を設ける。そして、上記第１シリンダｌとピス
トン２との間には上記サーモワックスの膨張収縮によっ
て往復動する第２シリンダ５を設ける。該第２シリンダ
５は、その下方に油逃がし用貫通孔５０を存する。また
、該第２シリンダ５の下端と第１シリンダ底部１３との
間には第２シリンダ５を上方に付勢するコイルバネ３５
を設ける。Further, a thermowax chamber 4 is provided within the side wall 11 of the first cylinder 1. A second cylinder 5 is provided between the first cylinder 1 and the piston 2, which is reciprocated by the expansion and contraction of the thermowax. The second cylinder 5 has an oil release through hole 50 below it. Further, a coil spring 35 is provided between the lower end of the second cylinder 5 and the first cylinder bottom 13 to bias the second cylinder 5 upward.
will be established.
上記調圧弁は自動車エンジンの潤滑油８の油圧回路に用
いるものである。The pressure regulating valve is used in a hydraulic circuit for lubricating oil 8 of an automobile engine.
また、上記第１シリンダ１は 上方において潤滑油８が
矢印Ａ方向より侵入するための開口部１０を有する。ま
た、上記第１シリンダ１の側壁ｌｌ内のサーモワックス
室４には、油温の変化により膨張収縮するサーモワック
スを収納する。また第２シリンダ５の下方に設けた油逃
がし用の貫通孔５０は、第１シリンダ１の油逃し穴１２
と同方向に向いている。Further, the first cylinder 1 has an opening 10 at the upper side through which the lubricating oil 8 enters from the direction of arrow A. Further, a thermowax chamber 4 within the side wall ll of the first cylinder 1 stores thermowax that expands and contracts depending on changes in oil temperature. Further, the oil relief through hole 50 provided below the second cylinder 5 is similar to the oil relief hole 12 of the first cylinder 1.
facing the same direction.
本例の調圧弁は、上記のごとく構成されているので１次
の作用効果を有する。これを第１図〜第４図を用いて説
明する。Since the pressure regulating valve of this example is configured as described above, it has first-order effects. This will be explained using FIGS. 1 to 4.
まず１油温か低い場合につき、第１図及び第２図を用い
て説明する。この場合には、サーモワックスは収縮状態
にあるため、第２シリンダ５はコイルバネ３５に押され
て上方にある。それ故１貫通孔５０も上方にある。しか
して、潤滑油８の圧力が上昇すると、ピストン２は下方
に押され第２図に示すごとく、第２シリンダ５内を下降
する。First, the case where the oil temperature is one level lower will be explained using FIGS. 1 and 2. In this case, since the thermowax is in a contracted state, the second cylinder 5 is pushed upward by the coil spring 35. Therefore, the first through hole 50 is also located above. When the pressure of the lubricating oil 8 increases, the piston 2 is pushed downward and moves down inside the second cylinder 5, as shown in FIG.
そして、ピストン２の頂部が貫通孔５０より下方に位置
すると、潤滑油８はＥ方向に流出する。この流出は潤滑
油８の圧力が設定圧となるまで続く。When the top of the piston 2 is located below the through hole 50, the lubricating oil 8 flows out in the E direction. This outflow continues until the pressure of the lubricating oil 8 reaches the set pressure.
次に、油温が高い場合につき第３図及び第４図を用いて
説明する。この場合は、サーモワックス４は膨張状態に
あるため、第２シリンダ５が下降している。それ故１貫
通孔５０も下方に位置する。Next, the case where the oil temperature is high will be explained using FIGS. 3 and 4. In this case, since the thermowax 4 is in an expanded state, the second cylinder 5 is lowered. Therefore, the first through hole 50 is also located below.
しかして、潤滑油８の圧力が上昇すると、ピストン２は
下降するが、低温時（第１図、第２図）に比して１貫通
孔５０が下方にあるため、前記ストロークが長い（第４
図３２）、つまり、ピストン２は圧力調整用バネ３をよ
り多く圧縮しないと。When the pressure of the lubricating oil 8 increases, the piston 2 descends, but since the first through hole 50 is located lower than when the temperature is low (FIGS. 1 and 2), the stroke is longer (see FIGS. 1 and 2). 4
(Fig. 32), that is, the piston 2 must compress the pressure adjustment spring 3 more.
貫通孔５０より潤滑油日をＥ方向へ流出させることがで
きない。The lubricating oil cannot flow out from the through hole 50 in the E direction.
したがって１本例によれは、油温の変化に拘らず圧力調
整を精度良く行うことができる調圧弁を捷供することが
できる。また、上記圧力調整はサーモワックス４と第２
シリンダ５とによって自動調整できる。Therefore, according to this embodiment, it is possible to provide a pressure regulating valve that can accurately regulate pressure regardless of changes in oil temperature. In addition, the above pressure adjustment is performed using the thermowax 4 and the second
It can be automatically adjusted by cylinder 5.
第１図〜第４図は本発明の実施例にかかる調圧弁とその
作動状態を示し、第１図及び第２図は低温時における縦
断面図５第３図及び第４図は高温時における継断面図、
第５図〜第８図は従来例を示し、第５図は油圧回路図、
第６図〜第８図は従来の調圧弁の作動状態を示す縦断面
図である。
１１２．シリンダ。
１２・・・油逃し穴。
２１１．ピストン
３１８．バネ。
４゜、、サーモワックス室。
５１．、第２シリンダ
５０ ・
・貫通孔。
８゜
潤滑油。
出
願
人
株式会社豊田自動織機製作所
代
理
人1 to 4 show a pressure regulating valve according to an embodiment of the present invention and its operating state, and FIGS. 1 and 2 are longitudinal cross-sectional views at low temperatures. FIGS. 3 and 4 are longitudinal sectional views at high temperatures. Joint sectional view,
Figures 5 to 8 show conventional examples, and Figure 5 is a hydraulic circuit diagram;
FIGS. 6 to 8 are longitudinal sectional views showing the operating state of a conventional pressure regulating valve. 112. Cylinder. 12...Oil release hole. 211. Piston 318. Spring. 4゜、Thermo wax chamber. 51. , second cylinder 50...through hole. 8° Lubricating oil. Agent for applicant Toyota Industries Corporation
Claims (1)
内を摺動するピストンと、該ピストンと第１シリンダ底
部との間に介設した圧力調整用バネと、上記第１シリン
ダ側壁に設けた油逃がし穴とよりなる調圧弁において、 上記第１シリンダの側壁内にはサーモワックスを収納し
たサーモワックス室を設けると共に、上記第１シリンダ
とピストンとの間には上記サーモワックスの膨張収縮に
よって往復動する第２シリンダを設け、該第２シリンダ
はその下方に油逃がし用の貫通孔を有することを特徴と
する調圧弁。[Scope of Claims] A first cylinder connected to a hydraulic circuit, a piston sliding inside the first cylinder, a pressure adjusting spring interposed between the piston and the bottom of the first cylinder, and a pressure adjusting spring interposed between the piston and the bottom of the first cylinder. In a pressure regulating valve consisting of an oil relief hole provided in the side wall of the first cylinder, a thermowax chamber containing thermowax is provided in the sidewall of the first cylinder, and the thermowax chamber is provided between the first cylinder and the piston. A pressure regulating valve comprising a second cylinder that reciprocates as wax expands and contracts, the second cylinder having a through hole for oil release below the second cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27990388A JPH02125182A (en) | 1988-11-04 | 1988-11-04 | Relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27990388A JPH02125182A (en) | 1988-11-04 | 1988-11-04 | Relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125182A true JPH02125182A (en) | 1990-05-14 |
Family
ID=17617522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27990388A Pending JPH02125182A (en) | 1988-11-04 | 1988-11-04 | Relief valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125182A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100348477B1 (en) * | 1999-12-31 | 2002-08-09 | 현대자동차주식회사 | Piston cooling structure |
| CN103090064A (en) * | 2013-01-28 | 2013-05-08 | 苏州宇东暖通技术有限公司 | Excessive pressure protecting valve |
| US8573249B2 (en) | 2010-10-28 | 2013-11-05 | Hyundai Motor Company | Relief valve for oil pump |
-
1988
- 1988-11-04 JP JP27990388A patent/JPH02125182A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100348477B1 (en) * | 1999-12-31 | 2002-08-09 | 현대자동차주식회사 | Piston cooling structure |
| US8573249B2 (en) | 2010-10-28 | 2013-11-05 | Hyundai Motor Company | Relief valve for oil pump |
| CN103090064A (en) * | 2013-01-28 | 2013-05-08 | 苏州宇东暖通技术有限公司 | Excessive pressure protecting valve |
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