JPH10196876A - Fluid pulsation attenuator - Google Patents
Fluid pulsation attenuatorInfo
- Publication number
- JPH10196876A JPH10196876A JP238397A JP238397A JPH10196876A JP H10196876 A JPH10196876 A JP H10196876A JP 238397 A JP238397 A JP 238397A JP 238397 A JP238397 A JP 238397A JP H10196876 A JPH10196876 A JP H10196876A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- air
- chamber
- cylinder
- pressurized
- 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.)
- Withdrawn
Links
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポンプ等により加
圧されて管路内を送給される非圧縮流体に含まれる脈動
を、送給の途上で減衰させる流体脈動の減衰器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attenuator for fluid pulsation which attenuates pulsation contained in an incompressible fluid which is supplied through a pipeline by being pressurized by a pump or the like during the supply.
【０００２】[0002]
【従来の技術】非圧縮流体は、加圧されたエネルギーを
機械に伝達し、大きな駆動力に変換したり、管路を介し
て遠隔の機器を駆動できる等の利便性があり、広範囲の
産業分野に利用されている。非圧縮流体には、各種機器
を駆動するために作動油や水（混合水）などが使用され
ているが、作動油は、金属に対して錆止性があり、腐蝕
性がなく、適正な粘度を有し、高温で蒸発し難いなどの
数々の利点があるため、一般に油圧機械の方が水圧機械
よりも数が多く、船舶の荷役機械や甲板機器なども一般
に油圧が利用されている。2. Description of the Related Art An incompressible fluid has the convenience of transmitting pressurized energy to a machine, converting it into a large driving force, and being capable of driving a remote device through a pipeline. Used in the field. Hydraulic oil and water (mixed water) are used as non-compressed fluids to drive various devices. Hydraulic oil has a rustproof property against metals, does not corrode, Hydraulic machines are generally more numerous than hydraulic machines because of their many advantages, such as having viscosity and being difficult to evaporate at high temperatures, and hydraulics are also generally used for cargo handling machines and deck equipment on ships.
【０００３】油圧ポンプから管路を介して油圧機器に送
給される圧油の中には、流量脈動が生じるので、管路や
機械の振動，騒音を発生したり、機械の動作の円滑性に
悪影響を及ぼし、管路や機械，特に圧力計などの耐久性
にも影響するので、送給管路の途中に流体脈動の減衰器
を設け、脈動エネルギーを減衰させている。[0003] Pressure oil supplied from a hydraulic pump to a hydraulic device via a pipeline generates flow pulsation, which causes vibration and noise of the pipeline and the machine, and smooth operation of the machine. Therefore, a fluid pulsation attenuator is provided in the middle of the feed line to attenuate the pulsation energy.
【０００４】[0004]
【発明が解決しようとする課題】従来の流体脈動の減衰
器Ａの構造を、図２の略図に基づいて説明すると、密閉
圧力容器１の内部を複数の区画（この減衰器Ａでは２
ａ，２ｂ，２ｃの３区画）に分割する仕切壁３及び４を
設け、仕切壁３及び４にそれぞれ開口５及び６を設け、
密閉圧力容器１の一方の端壁１ａに、圧油の供給管に接
続する圧油入口７を設け、密閉圧力容器１の他方の端壁
１ｂに、圧油の送出管に接続する圧油出口８を設ける。The structure of a conventional fluid pulsation attenuator A will be described with reference to the schematic diagram of FIG. 2. The inside of the sealed pressure vessel 1 is divided into a plurality of sections (in this attenuator A, 2 sections).
a, 2b, and 2c) are provided, and openings 5 and 6 are provided in the partition walls 3 and 4, respectively.
A pressure oil inlet 7 connected to a pressure oil supply pipe is provided at one end wall 1a of the sealed pressure vessel 1, and a pressure oil outlet connected to a pressure oil delivery pipe is provided at the other end wall 1b of the sealed pressure vessel 1. 8 is provided.
【０００５】油圧ポンプから送給される圧油は、供給管
から圧油入口７を経由して区画２ａに挿入され、区画２
ａから仕切壁３の開口５を通過する際に流路が絞られて
流速が早くなり、区画２ｂに入ると流速が低下する。区
画２ｂから仕切壁４の開口６を通過する際に再び流路が
絞られて流速が早くなり、区画２ｃに入ると流速が低下
し、圧油出口８を経由して油圧機器に連通する送出管に
送り出される。[0005] The pressure oil supplied from the hydraulic pump is inserted into the section 2a from the supply pipe via the pressure oil inlet 7, and is inserted into the section 2a.
When passing through the opening 5 of the partition wall 3 from a, the flow path is narrowed and the flow velocity is increased, and when entering the section 2b, the flow velocity is reduced. When passing through the opening 6 of the partition wall 4 from the section 2b, the flow path is narrowed again to increase the flow rate, and when entering the section 2c, the flow rate decreases, and the fluid communicates with the hydraulic equipment via the hydraulic oil outlet 8. It is sent out to a pipe.
【０００６】従って、流体脈動の減衰器Ａを通過する圧
油は、開口５，６により絞り効果により流速の急激な変
化を受けるので、圧油の脈動エネルギーが減衰させられ
る。脈動の減衰率Ｄは次式で示され、従来の流体脈動の
減衰器Ａでは５０％程度である。 高圧力（２１０kgf/cm2 程度）で使用する場合、油圧ポ
ンプの脈動が油圧回路管路などの振動，騒音に大きな影
響を及ぼすので、何らかの対策が必要である。本発明
は、管路などの振動，騒音防止に要する対策費を減少さ
せ、作動油の脈動（流速の急激な変化の繰り返し）によ
る圧力損失（消費動力の損失）を低減させるために、脈
動の減衰率Ｄを更に小さくすることを目的とするもので
ある。Accordingly, the pressure oil passing through the fluid pulsation attenuator A undergoes a rapid change in the flow velocity due to the throttle effect by the openings 5 and 6, so that the pulsation energy of the pressure oil is attenuated. The pulsation damping rate D is represented by the following equation, and is about 50% in the conventional fluid pulsation damper A. When used at a high pressure (about 210 kgf / cm 2 ), some countermeasures are necessary because the pulsation of the hydraulic pump greatly affects the vibration and noise of the hydraulic circuit pipeline and the like. The present invention reduces pulsation in order to reduce the cost of countermeasures required to prevent vibration and noise in pipelines and the like, and to reduce pressure loss (loss of power consumption) due to pulsation of hydraulic oil (repetition of rapid changes in flow velocity). It is intended to further reduce the attenuation rate D.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明の流体脈動の減衰器は、シリンダの内壁面
に、該シリンダの内部を加圧流体室と空気室に仕切るス
トッパを設け、該ストッパに上記加圧流体室と空気室と
を連通する開口を設け、上記加圧流体室のシリンダ壁
に、加圧された非圧縮性流体の供給管路に接続する入口
と、送出管路に接続される出口とを設け、上記空気室の
シリンダ内壁面に摺動可能に挿入されるピストンに上記
シリンダ内壁面を密封するシールを設けた。In order to achieve the above object, a fluid pulsation attenuator according to the present invention is provided with a stopper on an inner wall surface of a cylinder for partitioning the inside of the cylinder into a pressurized fluid chamber and an air chamber. An opening for communicating the pressurized fluid chamber and the air chamber with the stopper, and an inlet connected to a supply pipe for a pressurized incompressible fluid; An outlet connected to a passage is provided, and a piston that is slidably inserted into the cylinder inner wall surface of the air chamber is provided with a seal that seals the cylinder inner wall surface.
【０００８】上記空気室に、圧空源に連通する空気管路
が接続される空気供給口を設け、上記空気管路に、上記
空気管路を開閉する予圧弁を設けることができる。上記
加圧された非圧縮性流体は、油圧ポンプによって加圧さ
れる圧油とすることができる。The air chamber may be provided with an air supply port to which an air pipe communicating with a compressed air source is connected, and the air pipe may be provided with a preload valve for opening and closing the air pipe. The pressurized incompressible fluid may be pressure oil pressurized by a hydraulic pump.
【０００９】[0009]
【発明の実施の形態】本発明の実施の形態について図面
を参照して説明すると、図１は流体脈動の減衰器Ａ1 の
概要を説明する略図であり、シリンダ１０の内壁面に
は、シリンダ１０の内部を左側の加圧流体室１１ａと右
側の空気室１１ｂとに仕切るストッパ１２が設けられ
る。ストッパ１２の中央部には、左側の加圧流体室１１
ａと右側の空気室１１ｂとを連通する開口１３が設けら
れ、シリンダ１０の左端壁に、供給管路に接続する入口
１４が設けられ、加圧流体室１１ａの一箇所に設けられ
た出口１５に、機械を駆動する油圧アクチュエータ（油
圧モータ，油圧シリンダ等）に連通する送出管路（図示
しない）を接続する。With reference to the drawings showing preferred embodiments of the embodiment of the present invention, FIG. 1 is a schematic for explaining an overview of the attenuator A 1 fluid pulsation, the inner wall surface of the cylinder 10, the cylinder A stopper 12 is provided to partition the inside of the chamber 10 into a left-side pressurized fluid chamber 11a and a right-side air chamber 11b. At the center of the stopper 12, the left pressurized fluid chamber 11
and an opening 13 for communicating the air chamber 11a with the air chamber 11b on the right side, an inlet 14 connected to the supply conduit at the left end wall of the cylinder 10, and an outlet 15 provided at one place of the pressurized fluid chamber 11a. Is connected to a delivery pipe (not shown) communicating with a hydraulic actuator (hydraulic motor, hydraulic cylinder, etc.) for driving the machine.
【００１０】空気室１１ｂのシリンダ１０の内壁面に摺
動可能に挿入されるピストン１６にシリンダ１０の内壁
面との隙間を密封するシール（本実施例ではＯリング）
１７を設ける。空気室１１ｂの所定の圧空量を設定し易
くするために、空気室１１ｂの右端部側に空気供給口１
８を設け、圧力制御弁（図示しない）を介して圧空源
（図示しない）に連通する空気管路１９を空気供給口１
８に接続し、空気管路１９に、空気室１１ｂに所定の圧
空量を与える予圧弁２０を設ける。A seal (an O-ring in this embodiment) for sealing a gap between the inner wall surface of the cylinder 10 and a piston 16 slidably inserted into the inner wall surface of the cylinder 10 of the air chamber 11b.
17 are provided. In order to facilitate setting a predetermined amount of compressed air in the air chamber 11b, an air supply port 1 is provided at the right end of the air chamber 11b.
8 and an air supply line 1 communicating with a compressed air source (not shown) through a pressure control valve (not shown).
8 and a pre-pressure valve 20 for providing a predetermined amount of compressed air to the air chamber 11b is provided in the air line 19.
【００１１】以上のように構成された流体脈動の減衰器
Ａ1 の作用を説明すると、ポンプを運転する前に、予圧
弁２０を開いて所定圧（本実施例ではポンプの常用最高
圧力の２０〜９０％の圧力）の圧空を空気室１１ｂに入
れ、ピストン１６をストッパ１２に当接させ、予圧弁２
０を閉じておく。次に、ポンプを運転すると、脈動を含
んだ加圧流体が供給管路から入口１４を経由して加圧流
体室１１ａに供給され、ピストン１６を押圧すると共
に、出口１５から送出管路へ流出する。[0011] In operation of the attenuator A 1 configuration fluid pulsations as described above, before operating the pump, the predetermined pressure (the present embodiment opens the preload valve 20 of conventional maximum pressure of the pump 20 (90% pressure) into the air chamber 11b, the piston 16 is brought into contact with the stopper 12, and the preload valve 2
0 is closed. Next, when the pump is operated, the pressurized fluid including pulsation is supplied from the supply pipe to the pressurized fluid chamber 11a via the inlet 14, presses the piston 16, and flows out from the outlet 15 to the delivery pipe. I do.
【００１２】押圧されたピストン１６は、図１において
右側に摺動して空気室１１ｂ内の圧空を圧縮し、空気室
１１ｂ内の圧空の圧力と加圧流体室１１ａ内の流体圧力
がほぼ等しくなる位置に停止する。従って、ピストン１
６は流体の脈動波を受ける都度、左右に微小な変位を繰
り返して脈動波を吸収するので、脈動の減衰率Ｄを２０
〜３０％にすることができ、流体の圧力損失も低下し
た。The pressed piston 16 slides to the right in FIG. 1 to compress the compressed air in the air chamber 11b, and the pressure of the compressed air in the air chamber 11b is substantially equal to the fluid pressure in the pressurized fluid chamber 11a. Stop at a certain position. Therefore, piston 1
6 absorbs a pulsating wave by repeating a minute displacement to the left and right each time a pulsating wave of a fluid is received.
３０30%, and the pressure loss of the fluid was also reduced.
【００１３】本発明の流体脈動の減衰器は、構造が簡単
であり、製作費が安価になる利点と、コンパクトになる
ので油圧回路内に設置し易い利点がある。以上の説明で
は、流体脈動の減衰器を油圧回路内に設けた場合につい
て述べたが、水圧機器の回路内に設けることも可能であ
り、水圧の脈動を減衰させることができる。The fluid pulsation attenuator of the present invention has the advantages that the structure is simple and the manufacturing cost is inexpensive, and that it is compact and easy to install in a hydraulic circuit. In the above description, the case where the fluid pulsation attenuator is provided in the hydraulic circuit has been described. However, it is also possible to provide the fluid pulsation attenuator in the circuit of the hydraulic equipment, and the pulsation of the hydraulic pressure can be attenuated.
【００１４】[0014]
【発明の効果】本発明の流体脈動の減衰器は以上のよう
に構成されているので、流体の脈動に応じてピストンが
円滑に作動して流体を吸収し、従来の流体脈動の減衰器
に見られるような絞り効果による流体抵抗がない。又、
ピストンの変位によって脈動が効果的に吸収されるの
で、従来の減衰器では５０％程度であった減衰率を２０
〜３０％に低減させることができた。本発明の流体脈動
の減衰器は、構造が簡単であるので、製作費が安価にな
り、コンパクトになるので油圧回路内に設置し易い等の
利点がある。Since the fluid pulsation damper of the present invention is constructed as described above, the piston operates smoothly to absorb the fluid in response to the pulsation of the fluid. There is no fluid resistance due to the throttle effect as can be seen. or,
Since the pulsation is effectively absorbed by the displacement of the piston, the damping rate which is about 50% in the conventional damper is reduced to 20%.
-30%. The fluid pulsation attenuator of the present invention has advantages in that the structure is simple, the manufacturing cost is low, and the fluid pulsation attenuator is compact, so that it can be easily installed in a hydraulic circuit.
【図１】本発明の流体脈動の減衰器の概要を説明する略
図である。FIG. 1 is a schematic diagram illustrating an outline of a fluid pulsation attenuator of the present invention.
【図２】従来の流体脈動の減衰器の概要を説明する略図
である。FIG. 2 is a schematic diagram illustrating an outline of a conventional fluid pulsation attenuator.
Ａ1 流体脈動の減衰器 １０ シリンダ １１ａ 加圧流体室 １１ｂ 空気室 １２ ストッパ １３ 開口 １４ 入口 １５ 出口 １６ ピストン １７ シール １８ 空気供給口 １９ 空気管路 ２０ 予圧弁A 1 Damper for fluid pulsation 10 Cylinder 11a Pressurized fluid chamber 11b Air chamber 12 Stopper 13 Opening 14 Inlet 15 Outlet 16 Piston 17 Seal 18 Air supply port 19 Air line 20 Preload valve
Claims (3)
を加圧流体室と空気室に仕切るストッパを設け、該スト
ッパに上記加圧流体室と空気室とを連通する開口を設
け、上記加圧流体室のシリンダ壁に、加圧された非圧縮
性流体の供給管路に接続する入口と、送出管路に接続さ
れる出口とを設け、上記空気室のシリンダ内壁面に摺動
可能に挿入されるピストンに上記シリンダ内壁面を密封
するシールを設けて成る流体脈動の減衰器。A stopper provided on an inner wall surface of the cylinder for partitioning the interior of the cylinder into a pressurized fluid chamber and an air chamber; an opening for communicating the pressurized fluid chamber with the air chamber is provided in the stopper; On the cylinder wall of the pressurized fluid chamber, an inlet connected to the supply pipe of the pressurized incompressible fluid and an outlet connected to the delivery pipe are provided, so that it can slide on the cylinder inner wall of the air chamber. A fluid pulsation attenuator comprising: a piston inserted into which a seal for sealing the inner wall surface of the cylinder is provided.
路が接続される空気供給口を設け、上記空気管路に、上
記空気管路を開閉する予圧弁を設けたことを特徴とする
請求項１記載の流体脈動の減衰器。2. An air supply port connected to an air pipe communicating with a compressed air source is provided in the air chamber, and a preload valve for opening and closing the air pipe is provided in the air pipe. 2. The fluid pulsation attenuator according to claim 1, wherein:
ンプによって加圧される圧油であることを特徴とする請
求項１又は２記載の流体脈動の減衰器。3. The fluid pulsation attenuator according to claim 1, wherein the pressurized incompressible fluid is pressurized oil pressurized by a hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP238397A JPH10196876A (en) | 1997-01-09 | 1997-01-09 | Fluid pulsation attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP238397A JPH10196876A (en) | 1997-01-09 | 1997-01-09 | Fluid pulsation attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10196876A true JPH10196876A (en) | 1998-07-31 |
Family
ID=11527720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP238397A Withdrawn JPH10196876A (en) | 1997-01-09 | 1997-01-09 | Fluid pulsation attenuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10196876A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040032290A (en) * | 2002-10-09 | 2004-04-17 | 박정근 | Pulsation absorbing device and pump with the device |
| JP2011163154A (en) * | 2010-02-05 | 2011-08-25 | Honda Motor Co Ltd | Connector for fuel piping |
-
1997
- 1997-01-09 JP JP238397A patent/JPH10196876A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040032290A (en) * | 2002-10-09 | 2004-04-17 | 박정근 | Pulsation absorbing device and pump with the device |
| JP2011163154A (en) * | 2010-02-05 | 2011-08-25 | Honda Motor Co Ltd | Connector for fuel piping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20040406 |