JPH08257998A - Cavitation jet nozzle - Google Patents
Cavitation jet nozzleInfo
- Publication number
- JPH08257998A JPH08257998A JP6381295A JP6381295A JPH08257998A JP H08257998 A JPH08257998 A JP H08257998A JP 6381295 A JP6381295 A JP 6381295A JP 6381295 A JP6381295 A JP 6381295A JP H08257998 A JPH08257998 A JP H08257998A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- jet
- cavitation
- diameter
- expansion portion
- 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
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Nozzles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高圧ポンプから供給す
る液体を、ノズルから液中又は気中に噴射し、キャビテ
ーションを伴う噴流として被加工物に衝突させることに
より、被加工物の表面を洗浄又は加工するキャビテーシ
ョン・ジェット・ノズルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention sprays a liquid supplied from a high-pressure pump into a liquid or air from a nozzle, and collides it with a workpiece as a jet flow accompanied by cavitation, so that the surface of the workpiece is The present invention relates to a cavitation jet nozzle for cleaning or processing.
【０００２】[0002]
【従来の技術】図８に示すような従来のキャビテーショ
ン・ジェット・ノズル（以下ノズルという）１Ｄにおい
ては、液Ｌ中に噴出した高速液噴流Ｊの周囲で、外部の
液Ｌが比較的滑らかに誘起され、その誘起された流れＳ
１と噴流Ｊとの境界に、速度剪断層が生じてキャビテー
ション核が発生する。しかし、流れＳ１は比較的滑らか
なので、キャビテーション核の発生は少ない。2. Description of the Related Art In a conventional cavitation jet nozzle (hereinafter referred to as a nozzle) 1D as shown in FIG. 8, the external liquid L is relatively smooth around a high-speed liquid jet J jetted into the liquid L. Induced and its induced flow S
At the boundary between 1 and the jet J, a velocity shear layer is generated and a cavitation nucleus is generated. However, since the flow S1 is relatively smooth, the generation of cavitation nuclei is small.
【０００３】これに対し図９に示すノズル１Ｅにおいて
は、開口部にテーパ状拡大部５Ｂを設け、キャビテーシ
ョン核の発生を促進している。しかし、このノズル１Ｅ
でも、キャビテーション核の発生は充分でない。On the other hand, in the nozzle 1E shown in FIG. 9, a tapered enlarged portion 5B is provided in the opening to promote the generation of cavitation nuclei. However, this nozzle 1E
However, the generation of cavitation nuclei is not enough.
【０００４】本発明は、キャビテーション核の発生を促
進するキャビテーション・ジェット・ノズルを提供する
ことを目的としている。An object of the present invention is to provide a cavitation jet nozzle which promotes the generation of cavitation nuclei.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、高圧ポ
ンプから供給する液体を、ノズルから液中に噴射し、キ
ャビテーションを伴う噴流として被加工物に衝突させる
ことにより、被加工物の表面を洗浄又は加工するキャビ
テーション・ジェット・ノズルにおいて、前記ノズルの
開口部において、ノズル絞り部の下流側に流路断面積の
急拡大部を設け、該急拡大部の流路断面積を下流方向に
略一定もしくは徐々に減少したのち外部に開放してい
る。According to the present invention, a liquid supplied from a high-pressure pump is jetted into the liquid from a nozzle and collided with the work as a jet flow accompanied by cavitation, thereby causing the surface of the work to be processed. In the cavitation jet nozzle for cleaning or processing the above, in the opening portion of the nozzle, a sharp enlarged portion of the flow passage cross-sectional area is provided on the downstream side of the nozzle narrowing portion, and the flow passage cross-sectional area of the sharp enlargement portion is set in the downstream direction. It is open to the outside after being kept at a constant level or gradually decreasing.
【０００６】更に本発明によれば、前記急拡大部の直径
は、絞り部の直径の２〜６倍であり、該急拡大部の長さ
が前記急拡大部の直径の０．５〜２．５倍であり、か
つ、ノズル出口端と被加工物表面との距離が、前記絞り
部の直径の５倍以上である。Further, according to the present invention, the diameter of the sudden expansion portion is 2 to 6 times the diameter of the narrowed portion, and the length of the sudden expansion portion is 0.5 to 2 times the diameter of the sudden expansion portion. .5 times, and the distance between the nozzle outlet end and the surface of the workpiece is 5 times or more the diameter of the narrowed portion.
【０００７】更に本発明によれば、前記急拡大部に、気
体を混入させる吸気孔を設けている。Further, according to the present invention, the sudden expansion portion is provided with an intake hole for mixing gas.
【０００８】更に本発明によれば、前記ノズルの開口部
の外周部に、環状の低速液噴流を噴射する環状ノズルを
設けている。Further, according to the present invention, an annular nozzle for ejecting an annular low speed liquid jet is provided on the outer peripheral portion of the opening of the nozzle.
【０００９】また本発明によれば、高圧ポンプから供給
する液体を、ノズルから気中に噴射し、キャビテーショ
ンを伴う噴流として被加工物に衝突させることにより、
被加工物の表面を洗浄又は加工するキャビテーション・
ジェット・ノズルにおいて、前記ノズルの開口部におい
て、ノズル絞り部の下流側に流路断面積の急拡大部を設
け、該急拡大部の流路断面積を下流方向に略一定もしく
は徐々に減少したのち外部に開放すると共に、前記ノズ
ルの開口部の外周部に、環状の低速液噴流を噴射する環
状ノズルを設けている。According to the present invention, the liquid supplied from the high-pressure pump is jetted into the air from the nozzle and collided with the workpiece as a jet flow accompanied by cavitation,
Cavitation for cleaning or processing the surface of the work piece
In the jet nozzle, a sharp expansion portion of the flow passage cross-sectional area is provided on the downstream side of the nozzle throttle portion in the opening portion of the nozzle, and the flow passage cross-sectional area of the rapid expansion portion is reduced substantially or gradually in the downstream direction. After that, an annular nozzle that is opened to the outside and that ejects an annular low-speed liquid jet is provided on the outer peripheral portion of the opening of the nozzle.
【００１０】更に本発明によれば、前記急拡大部の直径
は、絞り部の直径の２〜６倍であり、該急拡大部の長さ
が該拡大部の直径の０．５〜２．５倍であり、かつ、ノ
ズル出口端と被加工物との距離が、前記絞り部の直径の
５倍以上である。Further, according to the present invention, the diameter of the sudden expansion portion is 2 to 6 times the diameter of the narrowed portion, and the length of the sudden expansion portion is 0.5 to 2. The distance between the nozzle outlet end and the workpiece is 5 times or more the diameter of the narrowed portion.
【００１１】[0011]
【作用】上記のように構成されたキャビテーション・ジ
ェット・ノズルにおいては、高速液噴流の流れに誘起さ
れて外周部の液体の一部が急拡大部に逆流して流入し、
噴流との間に強い速度剪断層が生じる。この剪断層内に
微細な多数の渦が発生し、それらの渦の中心にキャビテ
ーション核が生成し、噴流と共に下流側へ流出して充分
に発達したキャビテーション噴流となり、被加工物の表
面でキャビテーションが崩壊する際に、強い衝撃圧を加
えて効果的な加工が可能となる。In the cavitation jet nozzle configured as described above, a part of the liquid at the outer peripheral portion flows back into the sudden expansion portion by being induced by the flow of the high-speed liquid jet,
A strong velocity shear layer occurs between the jet and the jet. A large number of fine vortices are generated in this shear layer, cavitation nuclei are generated at the center of these vortices, and they flow out to the downstream side together with the jet to form a fully developed cavitation jet, which causes cavitation on the surface of the workpiece. When collapsing, strong impact pressure is applied to enable effective processing.
【００１２】[0012]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１において、全体を符号１で示すノズル
の本体２には、内孔３に連続して絞り部４が形成されて
いる。そして、絞り部４の下流側には、急拡大部５が形
成されている。In FIG. 1, a main body 2 of the nozzle, generally designated by reference numeral 1, is formed with a narrowed portion 4 which is continuous with an inner hole 3. Then, a sudden expansion portion 5 is formed on the downstream side of the narrowed portion 4.
【００１４】その急拡大部５の直径Ｄは、絞り部４の直
径ｄの２〜６倍に形成され、長さＬは、その直径Ｄの
０．５〜２．５倍に形成されている。そして、急拡大部
５の出口端と被加工物Ｗの表面との距離Ｈは、直径ｄの
５倍以上に形成されている。The diameter D of the sudden expansion portion 5 is 2 to 6 times the diameter d of the narrowed portion 4, and the length L is 0.5 to 2.5 times the diameter D. . The distance H between the outlet end of the sudden expansion portion 5 and the surface of the workpiece W is 5 times or more the diameter d.
【００１５】次に作用について説明する。Next, the operation will be described.
【００１６】ノズル１から液Ｌ中に高速液噴流Ｊを噴射
すると、ノズル１の外部の液Ｌが噴流Ｊの流れに誘起さ
れ、液の一部が急拡大部５に逆流して循環流Ｓが発生
し、その循環流Ｓと噴流Ｊとの間に極めて複雑で顕著な
速度剪断層が生じる。そして、この剪断層内に、多数の
微細な渦が発生し、それらの渦の中心に非常に多くのキ
ャビテーション核が生成し、噴流Ｊと共に下流側に流出
して充分に発達したキャビテーション噴流ＣＪとなり、
被加工物Ｗでキャビテーションが崩壊される際に、強い
衝撃圧力が印加されて効果的な加工が行われる。When a high-speed liquid jet J is jetted into the liquid L from the nozzle 1, the liquid L outside the nozzle 1 is induced in the flow of the jet J, and a part of the liquid flows back to the sudden expansion portion 5 and the circulating flow S. Occurs, and an extremely complicated and remarkable velocity shear layer is generated between the circulating flow S and the jet J. Then, a large number of minute vortices are generated in this shear layer, and a large number of cavitation nuclei are generated at the centers of these vortices, which flow out to the downstream side together with the jet J and become a fully developed cavitation jet CJ. ,
When cavitation is collapsed in the workpiece W, a strong impact pressure is applied and effective machining is performed.
【００１７】図２には、本願ノズル１及び従来のテーパ
状の拡大ノズル１Ｅ（図９）の最大衝撃圧力Ｐｓｍａｘ
の実験結果値Ｐ１、Ｐ２が比較して示されている。ノズ
ル１の流路断面積を急拡大させることによって、極めて
簡単な構造で、急拡大部５内の循環流れを効果的に複雑
化することができ、キャビテーション核を増大させるこ
とができる。そのため、本発明によるノズルでは、拡大
部がテーパ状の従来ノズル１Ｅ（図９）と比較して、被
加工物表面における最大衝撃圧力Ｐｓｍａｘが図２に示
すように大きくなり、より効果的な加工効果を得ること
ができる。FIG. 2 shows the maximum impact pressure Psmax of the nozzle 1 of the present application and the conventional tapered expansion nozzle 1E (FIG. 9).
The experimental result values P1 and P2 of FIG. By rapidly expanding the flow passage cross-sectional area of the nozzle 1, it is possible to effectively complicate the circulating flow in the rapidly expanding portion 5 and increase the cavitation nucleus with an extremely simple structure. Therefore, in the nozzle according to the present invention, the maximum impact pressure Psmax on the surface of the workpiece becomes large as shown in FIG. 2 as compared with the conventional nozzle 1E (FIG. 9) having a tapered enlarged portion, and more effective machining is achieved. The effect can be obtained.
【００１８】他方、急拡大部５には、最適な形状寸法が
存在する。すなわち、図３に示す実験結果のように、急
拡大部５の直径Ｄが絞り部の直径ｄの２〜６倍の場合、
図４に示すように長さＬが直径Ｄの０．５〜２．５倍の
ときに、被加工物Ｗの表面における衝撃圧力が大きい。On the other hand, the sudden expansion portion 5 has an optimum shape and dimension. That is, as in the experimental result shown in FIG. 3, when the diameter D of the sudden expansion portion 5 is 2 to 6 times the diameter d of the narrowed portion,
As shown in FIG. 4, when the length L is 0.5 to 2.5 times the diameter D, the impact pressure on the surface of the workpiece W is large.
【００１９】また急拡大部５の出口端と被加工物Ｗの表
面との距離Ｈがあまり小さいと、Ｐｓｍａｘが低く、Ｗ
上の高圧部面積は狭い。また被加工物Ｗから剥離した固
形物などが、流れと共に急拡大部５に流入し、ノズル１
の本来の機能が阻害されるおそれがある。例えば、剥離
した固形物が噴流ＣＪと共に被加工物Ｗに再衝突して被
加工物Ｗを壊食したり、汚染したりする可能性がある。
したがって、特開平６−４７６６５号公報に示されるよ
うに、急拡大部５の出口端と被加工物Ｗの表面との距離
Ｈは、直径ｄの５倍以上にするのが好ましい。If the distance H between the exit end of the sudden expansion portion 5 and the surface of the workpiece W is too small, Psmax will be low and W
The area of the upper high pressure part is small. Further, solid matter and the like separated from the workpiece W flow into the sudden expansion portion 5 along with the flow, and
The original function of may be impaired. For example, the separated solid matter may collide with the workpiece W again together with the jet CJ to erode or contaminate the workpiece W.
Therefore, as shown in JP-A-6-47665, the distance H between the outlet end of the sudden expansion portion 5 and the surface of the workpiece W is preferably 5 times or more the diameter d.
【００２０】図５は本発明の別の実施例を示し、ノズル
１Ａの急拡大部５Ａの流路断面積を、下流方向に徐々に
減少するコーン状に形成し、他を図１と同様に構成した
例である。この実施例でも、同じ作用効果がある。FIG. 5 shows another embodiment of the present invention, in which the flow passage cross-sectional area of the abruptly enlarged portion 5A of the nozzle 1A is formed in a cone shape which gradually decreases in the downstream direction, and the others are the same as in FIG. It is a configuration example. This embodiment also has the same effect.
【００２１】図６は本発明の別の実施例を示し、ノズル
１Ｂの急拡大部５に気体を混入させる吸気孔６を設け、
他を図１と同様に構成した例である。FIG. 6 shows another embodiment of the present invention, in which an intake hole 6 for mixing gas is provided in the sudden expansion portion 5 of the nozzle 1B,
This is an example in which the other parts are configured similarly to FIG.
【００２２】一般に、キャビテーション核は、液体内に
適度に溶解している気体などによって生じる。したがっ
て、噴流Ｊや外周の液Ｌに必要程度の気体が溶解してい
ない場合には、適度な量の気体を供給してやるのが効果
的であることは、特開平６−４７６６７号公報に示され
ている。この実施例では、吸気孔６を設けることによ
り、噴流Ｊの吸引作用で動力なしで気体を供給すること
ができ、同時に、急拡大部５の乱れた循環流Ｓにより、
混入した気泡を効果的に微粒化し、キャビテーション核
の発生を促進することができる。Generally, the cavitation nuclei are generated by a gas or the like which is appropriately dissolved in the liquid. Therefore, when the required amount of gas is not dissolved in the jet J or the liquid L on the outer circumference, it is effective to supply an appropriate amount of gas, as disclosed in JP-A-6-47667. ing. In this embodiment, by providing the intake hole 6, the gas can be supplied without power by the suction action of the jet flow J, and at the same time, the turbulent circulation flow S of the sudden expansion portion 5 causes
The mixed bubbles can be effectively atomized to promote the generation of cavitation nuclei.
【００２３】図７は本発明の別の実施例を示し、気中に
高速液噴流Ｊを噴射するノズル１Ｃの急拡大部５の外周
部に、環状の低速液噴流Ｊ１を噴射するテーパ状の環状
ノズル７を設け、他を図１と同様に構成した例である。
他方、外部の液Ｌが汚濁しており、そのまま噴流Ｊを被
加工物Ｗに衝突させると、流れに誘起された汚濁物質も
衝突して加工面に好ましくない影響が生ずる。この実施
例では高速液噴流Ｊの回りを清浄な低速液噴流Ｊ２で環
状に覆うことにより汚濁物質の衝突を防止することがで
きる。FIG. 7 shows another embodiment of the present invention, in which a tapered low-speed liquid jet J1 is jetted to the outer peripheral portion of the abruptly enlarged portion 5 of the nozzle 1C for jetting the high-speed liquid jet J into the air. This is an example in which an annular nozzle 7 is provided and the others are configured in the same manner as in FIG.
On the other hand, when the external liquid L is polluted and the jet J is made to collide with the workpiece W as it is, the pollutant substance induced by the flow also collides, which causes an unfavorable influence on the machining surface. In this embodiment, the circumference of the high-speed liquid jet J is covered with a clean low-speed liquid jet J2 in an annular shape to prevent the collision of pollutants.
【００２４】また、この実施例は気中における被加工物
Ｗの加工又は洗浄に有効である。すなわち、外周部が気
相のためキャビテーションが生じない場合は、高速液噴
流Ｊの回りを低速液噴流Ｊ１で環状に覆うことにより、
両噴流Ｊ、Ｊ１の境界に速度剪断層を生じさせ、キャビ
テーションを効果的に発生させることができる。Further, this embodiment is effective for processing or cleaning the workpiece W in the air. That is, when cavitation does not occur because the outer peripheral portion is in the vapor phase, by covering the area around the high-speed liquid jet J with the low-speed liquid jet J1 in an annular shape,
Cavitation can be effectively generated by creating a velocity shear layer at the boundary between the two jets J and J1.
【００２５】[0025]
【発明の効果】本発明によれば以上の通りノズル１の流
路断面積を急拡大させることによって、極めて簡単な構
造で、急拡大部５内の循環流れを効果的に複雑化するこ
とができ、キャビテーション核を増大させることができ
る。そのため、本発明によるノズルでは、拡大部がテー
パ状の従来ノズル１Ｅ（図９）と比較して、被加工物表
面における最大衝撃圧力Ｐｓｍａｘが図２に示すように
大きくなり、より効果的な加工効果を得ることができ
る。According to the present invention, by rapidly expanding the flow passage cross-sectional area of the nozzle 1 as described above, it is possible to effectively complicate the circulating flow in the sudden expansion portion 5 with a very simple structure. It is possible to increase the cavitation nucleus. Therefore, in the nozzle according to the present invention, the maximum impact pressure Psmax on the surface of the workpiece becomes large as shown in FIG. 2 as compared with the conventional nozzle 1E (FIG. 9) having the tapered enlarged portion, and more effective machining is achieved. The effect can be obtained.
【図１】本発明の第１実施例を示す側断面図。FIG. 1 is a side sectional view showing a first embodiment of the present invention.
【図２】最大衝撃圧力の実験結果を示す図。FIG. 2 is a diagram showing an experimental result of maximum impact pressure.
【図３】最大衝撃圧力の実験結果を示す図。FIG. 3 is a diagram showing an experimental result of maximum impact pressure.
【図４】最大衝撃圧力の実施例を示す図。FIG. 4 is a diagram showing an example of maximum impact pressure.
【図５】本発明の第２実施例を示す側断面図。FIG. 5 is a sectional side view showing a second embodiment of the present invention.
【図６】本発明の第３実施例を示す側断面図。FIG. 6 is a side sectional view showing a third embodiment of the present invention.
【図７】本発明の第４実施例を示す側断面図。FIG. 7 is a side sectional view showing a fourth embodiment of the present invention.
【図８】従来ノズルの一例を示す側断面図。FIG. 8 is a side sectional view showing an example of a conventional nozzle.
【図９】従来ノズルの他の例を示す側断面図。FIG. 9 is a side sectional view showing another example of a conventional nozzle.
ＣＪ・・・キャビテーション噴流 Ｄ・・・急拡大部の直径 ｄ・・・絞り部の直径 Ｌ・・・急拡大部の長さ Ｈ・・・急拡大部出口端と被加工物表面との距離 Ｊ・・・高速液噴流 Ｊ１・・・低速液噴流 Ｌ・・・液 Ｓ・・・循環流 Ｓ１・・・誘起された流れ Ｖ・・・渦 Ｗ・・・被加工物 １、１Ａ〜１Ｅ・・・キャビテーション・ジェット・ノ
ズル ２・・・本体 ３・・・内孔 ４・・・絞り部 ５、５Ａ・・・急拡大部 ５Ｃ・・・テーパ状拡大部 ６・・・吸気孔 ７・・・環状ノズルCJ ... Cavitation jet D ... Diameter of sudden expansion part d ... Diameter of constriction part L ... Length of sudden expansion part H ... Distance between exit end of sudden expansion part and workpiece surface J ... High-speed liquid jet J1 ... Low-speed liquid jet L ... Liquid S ... Circulating flow S1 ... Induced flow V ... Vortex W ... Workpiece 1, 1A to 1E ... Cavitation jet nozzle 2 ... Main body 3 ... Inner hole 4 ... Throttle portion 5, 5A ... Sudden expansion portion 5C ... Tapered expansion portion 6 ... Intake hole 7. ..Round nozzles
Claims (6)
から液中に噴射し、キャビテーションを伴う噴流として
被加工物に衝突させることにより、被加工物の表面を洗
浄又は加工するキャビテーション・ジェット・ノズルに
おいて、前記ノズルの開口部において、ノズル絞り部の
下流側に流路断面積の急拡大部を設け、該急拡大部の流
路断面積を下流方向に略一定もしくは徐々に減少したの
ち外部に開放していることを特徴とするキャビテーショ
ン・ジェット・ノズル。1. A cavitation jet nozzle for cleaning or processing the surface of a workpiece by injecting a liquid supplied from a high-pressure pump into the liquid from a nozzle and colliding it with the workpiece as a jet flow accompanied by cavitation. In the opening portion of the nozzle, a rapid expansion portion of the flow passage cross-sectional area is provided on the downstream side of the nozzle throttle portion, and the flow passage cross-sectional area of the rapid expansion portion is reduced to a substantially constant or gradually reduced value to the outside. Cavitation jet nozzle characterized by being open.
２〜６倍であり、該急拡大部の長さが前記急拡大部の直
径の０．５〜２．５倍であり、かつ、ノズル出口端と被
加工物表面との距離が、前記絞り部の直径の５倍以上で
あることを特徴とする請求項１記載のキャビテーション
・ジェット・ノズル。2. The diameter of the sudden expansion portion is 2 to 6 times the diameter of the narrowed portion, and the length of the sudden expansion portion is 0.5 to 2.5 times the diameter of the sudden expansion portion. The cavitation jet nozzle according to claim 1, wherein the distance between the nozzle outlet end and the surface of the workpiece is 5 times or more the diameter of the narrowed portion.
孔を設けたことを特徴とする請求項１記載のキャビテー
ション・ジェット・ノズル。3. The cavitation jet nozzle according to claim 1, wherein the sudden expansion portion is provided with an intake hole through which gas is mixed.
低速液噴流を噴射する環状ノズルを設けたことを特徴と
する請求項１記載のキャビテーション・ジェット・ノズ
ル。4. The cavitation jet nozzle according to claim 1, wherein an annular nozzle for ejecting an annular low-speed liquid jet is provided on the outer peripheral portion of the opening of the nozzle.
から気中に噴射し、キャビテーションを伴う噴流として
被加工物に衝突させることにより、被加工物の表面を洗
浄又は加工するキャビテーション・ジェット・ノズルに
おいて、前記ノズルの開口部において、ノズル絞り部の
下流側に流路断面積の急拡大部を設け、該急拡大部の流
路断面積を下流方向に略一定もしくは徐々に減少したの
ち外部に開放すると共に、前記ノズルの開口部の外周部
に、環状の低速液噴流を噴射する環状ノズルを設けたこ
とを特徴とするキャビテーション・ジェット・ノズル。5. A cavitation jet nozzle for cleaning or processing the surface of a workpiece by injecting a liquid supplied from a high-pressure pump into the air from a nozzle and colliding it with the workpiece as a jet flow accompanied by cavitation. In the opening portion of the nozzle, a rapid expansion portion of the flow passage cross-sectional area is provided on the downstream side of the nozzle throttle portion, and the flow passage cross-sectional area of the rapid expansion portion is reduced to a substantially constant or gradually reduced value to the outside. A cavitation jet nozzle, which is opened and is provided with an annular nozzle for ejecting an annular low-speed liquid jet on the outer peripheral portion of the opening of the nozzle.
２〜６倍であり、該急拡大部の長さが該拡大部の直径の
０．５〜２．５倍であり、かつ、ノズル出口端と被加工
物との距離が、前記絞り部の直径の５倍以上であること
を特徴とする請求項５記載のキャビテーション・ジェッ
ト・ノズル。6. The diameter of the sudden expansion portion is 2 to 6 times the diameter of the narrowed portion, and the length of the sudden expansion portion is 0.5 to 2.5 times the diameter of the expansion portion, The cavitation jet nozzle according to claim 5, wherein the distance between the nozzle outlet end and the workpiece is 5 times or more the diameter of the narrowed portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6381295A JPH08257998A (en) | 1995-03-23 | 1995-03-23 | Cavitation jet nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6381295A JPH08257998A (en) | 1995-03-23 | 1995-03-23 | Cavitation jet nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08257998A true JPH08257998A (en) | 1996-10-08 |
Family
ID=13240167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6381295A Pending JPH08257998A (en) | 1995-03-23 | 1995-03-23 | Cavitation jet nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08257998A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000000563A (en) * | 1998-04-13 | 2000-01-07 | Katsuya Sanekata | Apparatus and method for improving liquid quality |
| JP2000167497A (en) * | 1998-12-08 | 2000-06-20 | Babcock Hitachi Kk | Water jet nozzle |
| WO2012081716A1 (en) * | 2010-12-14 | 2012-06-21 | Ｊｆｅスチール株式会社 | Nozzle for removing scale of steel plate, scale removing device for steel plate, and method for removing scale of steel plate |
| US20130298626A1 (en) * | 2011-01-26 | 2013-11-14 | Jfe Steel Corporation | Descaling nozzle for removing scale from steel sheet, descaling apparatus for removing scale from steel sheet, and descaling method for removing scale from steel sheet |
| CN112292211A (en) * | 2018-05-10 | 2021-01-29 | Rgl水库管理有限公司 | Steam injection nozzle |
| CN113083535A (en) * | 2021-03-12 | 2021-07-09 | 武汉大学 | Double-shear cavitation nozzle |
-
1995
- 1995-03-23 JP JP6381295A patent/JPH08257998A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000000563A (en) * | 1998-04-13 | 2000-01-07 | Katsuya Sanekata | Apparatus and method for improving liquid quality |
| JP2000167497A (en) * | 1998-12-08 | 2000-06-20 | Babcock Hitachi Kk | Water jet nozzle |
| WO2012081716A1 (en) * | 2010-12-14 | 2012-06-21 | Ｊｆｅスチール株式会社 | Nozzle for removing scale of steel plate, scale removing device for steel plate, and method for removing scale of steel plate |
| CN103260779A (en) * | 2010-12-14 | 2013-08-21 | 杰富意钢铁株式会社 | Nozzle for removing scale of steel plate, scale removing device for steel plate, and method for removing scale of steel plate |
| CN103260779B (en) * | 2010-12-14 | 2015-12-09 | 杰富意钢铁株式会社 | The oxide skin removing method of the oxide skin removing nozzle of steel plate and the oxide skin removing device of steel plate and steel plate |
| US9321084B2 (en) | 2010-12-14 | 2016-04-26 | Jfe Steel Corporation | Descaling nozzle for removing scale from steel sheet, descaling apparatus for removing scale from steel sheet, and descaling method for removing scale from steel sheet |
| US20130298626A1 (en) * | 2011-01-26 | 2013-11-14 | Jfe Steel Corporation | Descaling nozzle for removing scale from steel sheet, descaling apparatus for removing scale from steel sheet, and descaling method for removing scale from steel sheet |
| US9216446B2 (en) * | 2011-01-26 | 2015-12-22 | Jfe Steel Corporation | Descaling nozzle for removing scale from steel sheet, descaling apparatus for removing scale from steel sheet, and descaling method for removing scale from steel sheet |
| CN112292211A (en) * | 2018-05-10 | 2021-01-29 | Rgl水库管理有限公司 | Steam injection nozzle |
| CN113083535A (en) * | 2021-03-12 | 2021-07-09 | 武汉大学 | Double-shear cavitation nozzle |
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