JPH0338490Y2 - - Google Patents

Info

Publication number
JPH0338490Y2
JPH0338490Y2 JP16063084U JP16063084U JPH0338490Y2 JP H0338490 Y2 JPH0338490 Y2 JP H0338490Y2 JP 16063084 U JP16063084 U JP 16063084U JP 16063084 U JP16063084 U JP 16063084U JP H0338490 Y2 JPH0338490 Y2 JP H0338490Y2
Authority
JP
Japan
Prior art keywords
orifice
convex portion
fluid
communication hole
noise
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
Application number
JP16063084U
Other languages
Japanese (ja)
Other versions
JPS6175505U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP16063084U priority Critical patent/JPH0338490Y2/ja
Publication of JPS6175505U publication Critical patent/JPS6175505U/ja
Application granted granted Critical
Publication of JPH0338490Y2 publication Critical patent/JPH0338490Y2/ja
Expired legal-status Critical Current

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Description

【考案の詳細な説明】 (産業上の利用分野) この考案は、流体音の発生を少なくした低騒音
オリフイスに関する。
[Detailed description of the invention] (Field of industrial application) This invention relates to a low-noise orifice that reduces the generation of fluid noise.

(従来の技術) 従来から知られているオリフイスは小孔からな
るので、キヤビテーシヨンが原因となつてシユー
という流体音を発生していた。
(Prior Art) Conventionally known orifices consist of small holes, and therefore generate fluid noises due to cavitation.

(本考案が解決しようとする問題点) 上記のようにオリフイス部分に流体音が発生す
れば、それがオペレータにとつて耳障りであり、
騒音の原因にもなる問題を含んでいた。
(Problems to be solved by the present invention) If fluid noise is generated at the orifice as described above, it will be unpleasant for the operator.
It also contained problems that caused noise.

この考案は、上記流体音の発生を防止したオリ
フイスの提供を目的にする。
The object of this invention is to provide an orifice that prevents the generation of fluid noise.

(問題点を解決するための手段) この考案は、上記目的を達成するために、流通
孔の一端に凸部を形成するとともに、こ凸部には
当該流通孔に開口し、しかも凸部先端から基部に
まで開口した1又は複数の絞り部を有してなるこ
とを特徴とするものである。
(Means for Solving the Problem) In order to achieve the above object, this invention forms a convex portion at one end of the communication hole, and the convex portion has an opening into the communication hole, and the tip of the convex portion. It is characterized by having one or more aperture parts that are open from the base to the base.

(本考案の作用) この考案は、上記のように構成したで、当該オ
リフイス部内で噴流の拡散によつて、噴出後の静
止流体とのせん断が弱められ、キヤビテーシヨン
強さが低下する。
(Operation of the present invention) With the present invention configured as described above, the diffusion of the jet flow within the orifice portion weakens the shear with the stationary fluid after ejection, reducing the cavitation strength.

(本考案の効果) キヤビテーシヨン効果強さが低下するので、シ
ユーという流体音の発生が防止される。
(Effects of the present invention) Since the strength of the cavitation effect is reduced, generation of fluid sound such as hissing is prevented.

(本考案の実施例) 第1,2図に示した第1実施例は、流通孔1の
一側には凸部2を形成している。この凸部2は断
面台形をなし、流通孔1側の基部2aを先端2b
に対して大径にしている。
(Embodiment of the present invention) In the first embodiment shown in FIGS. 1 and 2, a convex portion 2 is formed on one side of a communication hole 1. This convex portion 2 has a trapezoidal cross section, with a base 2a on the side of the flow hole 1 and a tip 2b.
The diameter is larger than that of the

このようにした凸部2には、上記先端2bから
基部2aにわたつてオリフイス部3を形成し、こ
のオリフイス部3をもつてこの考案のオリフイス
としている。
The convex portion 2 thus constructed has an orifice portion 3 formed extending from the tip 2b to the base portion 2a, and this orifice portion 3 serves as the orifice of this invention.

上記のように凸部2にオリフイス部3を形成し
たので、流通孔1からオリフイス部3に流入した
流体が、このオリフイス部3内で拡散して、噴出
後の静止流体とのせん段が弱められる。したがつ
て、キヤビーテーシヨン強さが低下し、その分流
体音が低くなる。
Since the orifice part 3 is formed in the convex part 2 as described above, the fluid that has flowed into the orifice part 3 from the flow hole 1 is diffused within this orifice part 3, and the level between it and the stationary fluid after ejection is weakened. It will be done. Therefore, the cavitation strength decreases, and the fluid sound decreases accordingly.

第3図に示した第2実施例は、オリフイス部3
を2本形成し、第4図に示した第3実施例はオリ
フイス部3を4本形成したものである。そして、
このオリフイス部3の本数が多くなればなるほ
ど、キヤビテーシヨン強さが低下するので、流体
音がより一層低くなる。
The second embodiment shown in FIG.
In the third embodiment shown in FIG. 4, four orifice portions 3 are formed. and,
The greater the number of orifice portions 3, the lower the cavitation strength, and the lower the fluid sound.

また、第5図に示した第4実施例は、4本のオ
リフイス部3を中心位置で交差させるとともに、
その交差位置から放射状にしたものである。
Further, in the fourth embodiment shown in FIG. 5, the four orifice parts 3 are crossed at the center position, and
It is radial from the intersection position.

そして、実際には、複数のオリフイス部を放射
状に形成したときが、最も効果が大きい。
In reality, the effect is greatest when the plurality of orifice parts are formed radially.

【図面の簡単な説明】[Brief explanation of the drawing]

図面第1図及び第2図はこの考案の第1実施例
を示すもので、第1図は−線断面図、第2図
は平面図であり、第3図は第2実施例の平面図、
第4図は第3実施例の平面図、第5図は第4実施
例の断面図である。 1……流通孔、2……凸部、2a……凸部、2
b……先端、3……オリフイス部。
Drawings 1 and 2 show the first embodiment of this invention, in which Fig. 1 is a sectional view taken along the - line, Fig. 2 is a plan view, and Fig. 3 is a plan view of the second embodiment. ,
FIG. 4 is a plan view of the third embodiment, and FIG. 5 is a sectional view of the fourth embodiment. 1... Communication hole, 2... Protrusion, 2a... Protrusion, 2
b... Tip, 3... Orifice part.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 流通孔の一端に凸部を形成するとともに、この
凸部には当該流通孔に開口し、しかも凸部先端か
ら基部にまで開口した1又は複数のオリフイス部
を有してなる低騒音オリフイス。
A low-noise orifice comprising a convex portion formed at one end of a communication hole, and the convex portion having one or more orifice portions opening into the communication hole and opening from the tip of the convex portion to the base thereof.
JP16063084U 1984-10-24 1984-10-24 Expired JPH0338490Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16063084U JPH0338490Y2 (en) 1984-10-24 1984-10-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16063084U JPH0338490Y2 (en) 1984-10-24 1984-10-24

Publications (2)

Publication Number Publication Date
JPS6175505U JPS6175505U (en) 1986-05-21
JPH0338490Y2 true JPH0338490Y2 (en) 1991-08-14

Family

ID=30718554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16063084U Expired JPH0338490Y2 (en) 1984-10-24 1984-10-24

Country Status (1)

Country Link
JP (1) JPH0338490Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6130929B2 (en) * 2013-12-27 2017-05-17 三菱日立パワーシステムズ株式会社 Low noise decompression device and combustion device

Also Published As

Publication number Publication date
JPS6175505U (en) 1986-05-21

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