JP6072410B2 - Fluid coupling - Google Patents
Fluid coupling Download PDFInfo
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- JP6072410B2 JP6072410B2 JP2011288149A JP2011288149A JP6072410B2 JP 6072410 B2 JP6072410 B2 JP 6072410B2 JP 2011288149 A JP2011288149 A JP 2011288149A JP 2011288149 A JP2011288149 A JP 2011288149A JP 6072410 B2 JP6072410 B2 JP 6072410B2
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- thrust washer
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- rotation
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- 230000008878 coupling Effects 0.000 title claims description 30
- 238000010168 coupling process Methods 0.000 title claims description 30
- 238000005859 coupling reaction Methods 0.000 title claims description 30
- 239000012530 fluid Substances 0.000 title claims description 29
- 239000002131 composite material Substances 0.000 claims description 25
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 21
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 21
- 229910018104 Ni-P Inorganic materials 0.000 claims description 16
- 229910018536 Ni—P Inorganic materials 0.000 claims description 16
- 239000010935 stainless steel Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 6
- 210000000078 claw Anatomy 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 11
- 238000004381 surface treatment Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010953 base metal Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000011882 ultra-fine particle Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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- Joints With Pressure Members (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Description
この発明は、流体継手に関し、特に、共回り防止機能を有している流体継手に関する。 The present invention relates to a fluid coupling, and more particularly to a fluid coupling having a co-rotation preventing function.
従来、流体継手として、互いに連通する流体通路を有している一対の継手部材と、両継手部材の突合わせ端面の間に介在させられるシール手段とを備えており、いずれか一方の継手部材に設けられたおねじ部材と他方の継手部材に設けられためねじ部材とによって継手部材同士が結合されるとともに、スラストワッシャを含んだ共回り防止手段によってねじ部材と継手部材との共回りが防止されているものが知られている（特許文献１）。 Conventionally, as a fluid coupling, a pair of coupling members having fluid passages communicating with each other and sealing means interposed between the butted end surfaces of both coupling members are provided. The joint member is connected to each other by the provided screw member and the other joint member, and the joint member is coupled by the joint member, and the joint member is prevented from co-rotating by the co-rotation preventing means including the thrust washer. Is known (Patent Document 1).
上記従来の流体継手において、おねじ部材とめねじ部材とが一旦結合された後、メンテナンスなどの必要性から、脱着が繰り返されることがあり、この場合に、共回り防止手段は、取り出すことが困難であり、繰り返し使用される。 In the above-described conventional fluid coupling, once the male thread member and the female thread member are once coupled, the detachment may be repeated due to the necessity of maintenance, etc. In this case, it is difficult to remove the common rotation preventing means. It is used repeatedly.
特許文献１のような１枚のスラストワッシャでは、最初の結合時に共回りしなかった場合であっても、着脱を繰り返したときには共回り防止効果が低下するという問題があった。
One thrust washer as in
この発明の目的は、着脱を繰り返しても、おねじ部材とめねじ部材とをねじ合わせていく時の共回り防止効果が低下しない流体継手を提供することにある。 An object of the present invention is to provide a fluid coupling in which the effect of preventing co-rotation when a male screw member and a female screw member are screwed together even when the attachment and detachment is repeated is not reduced.
この発明による流体継手は、互いに連通する流体通路を有している一対の継手部材と、両継手部材の突合わせ端面の間に介在させられるシール手段とを備えており、いずれか一方の継手部材に設けられたおねじ部材と他方の継手部材に設けられためねじ部材とによって継手部材同士が結合されるとともに、スラストワッシャを含んだ共回り防止手段によってねじ部材と継手部材との共回りが防止されている流体継手において、共回り防止手段は、２枚のスラストワッシャが重ね合わされることで形成されており、各スラストワッシャは、表面にＮｉ−Ｐ＋ＰＴＦＥ複合皮膜が形成されたステンレス鋼の熱処理品であり、各スラストワッシャの複合皮膜の厚みが４〜７μｍとされていることを特徴とするものである。
The fluid coupling according to the present invention includes a pair of coupling members having fluid passages communicating with each other, and a sealing means interposed between the butted end surfaces of both coupling members, and either one of the coupling members The joint member is coupled to each other by the male screw member provided on the other joint member and the other joint member, and the joint member prevents the joint member from rotating together with the joint member by means of the joint rotation prevention means including the thrust washer. In the fluid coupling, the co-rotation preventing means is formed by superimposing two thrust washers, and each thrust washer is a heat treated product of stainless steel with a Ni-P + PTFE composite film formed on the surface. der is, the thickness of the composite film of the thrust washer is those characterized that you have been a 4～7Myuemu.
スラストワッシャとしては、摩擦係数が小さいものが適しており、例えば、ステンレス鋼にＰＴＦＥがコーティング（いわゆるテフロン（登録商標）コーティング）されたスラストワッシャを使用することで共回り性能（共回り防止効果）が向上する。 A thrust washer with a small coefficient of friction is suitable. For example, the use of a thrust washer coated with PTFE on stainless steel (so-called Teflon (registered trademark) coating) enables a co-rotation performance (co-rotation prevention effect). Will improve.
この発明による流体継手では、共回り性能として、従来考慮されていなかった着脱性能（繰り返し着脱を行った際の共回り防止効果の持続性および皮膜の剥離の発生の有無）が考慮されている。そして、ステンレス鋼にＰＴＦＥがコーティングされたスラストワッシャを使用しただけでは、着脱性能の確保に問題があるとの知見に基づき、共回り防止手段が、基材金属（例えばステンレス鋼）表面にＮｉ（ニッケル）−Ｐ（リン）＋ＰＴＦＥ（ポリテトラフルオロエチレン）複合皮膜が形成されてかつ熱処理が施された２枚のスラストワッシャからなるものとされている。 In the fluid coupling according to the present invention, as the co-rotation performance, the attachment / detachment performance that has not been considered in the past (the persistence of the effect of preventing the co-rotation when repeatedly attaching and detaching and the occurrence of peeling of the film) is considered. Based on the knowledge that the use of a thrust washer coated with PTFE on stainless steel has a problem in securing attachment / detachment performance, the co-rotation preventing means uses Ni (for example, stainless steel) on the surface of the base metal (for example, stainless steel). Nickel) -P (phosphorus) + PTFE (polytetrafluoroethylene) composite film is formed, and it is composed of two thrust washers subjected to heat treatment.
Ｎｉ−Ｐ＋ＰＴＦＥ複合皮膜は、金属皮膜（Ｎｉ−Ｐ皮膜）中に複合材としてのＰＴＦＥ超微粒子を含有させることで得ることができる。この複合皮膜が形成されていることで、スラストワッシャの静摩擦係数が小さいものとなり、共回り性能が向上する。熱処理は、所定時間（３０分以上）、高温（２５０℃以上）で加熱するもので、これにより、金属皮膜の硬度が上がり、着脱性能が向上する。 The Ni-P + PTFE composite film can be obtained by containing ultrafine PTFE particles as a composite material in a metal film (Ni-P film). By forming this composite film, the static friction coefficient of the thrust washer becomes small, and the co-rotation performance is improved. The heat treatment is performed for a predetermined time (30 minutes or more) and at a high temperature (250 ° C. or more), thereby increasing the hardness of the metal film and improving the attachment / detachment performance.
基材金属は、通常、ステンレス鋼とされるが、ステンレス鋼には分類されないが、これに類似の合金とすることもできる。 The base metal is usually stainless steel, but is not classified as stainless steel, but can be an alloy similar to this.
共回り性能の向上については、公知のスラストワッシャを１枚から２枚にすることによっても可能であるが、共回り性能を向上したこの構成によっても、着脱性能を向上することは困難であった。この困難な課題がＮｉ−Ｐ＋ＰＴＦＥ複合皮膜を２枚（３枚以上であってもよいが、２枚で十分）使用することによって解決される。 Although it is possible to improve the co-rotation performance by changing the number of known thrust washers from one to two, it is difficult to improve the attachment / detachment performance even with this configuration with improved co-rotation performance. . This difficult problem is solved by using two Ni-P + PTFE composite coatings (three or more may be sufficient, but two are sufficient).
各スラストワッシャの複合皮膜の厚みは、４〜７μｍとされていることが好ましい。 The thickness of the composite coating of each thrust washer is preferably 4-7 μm.
複合皮膜の厚みが４μｍ未満であると、摩擦係数が高くなって、共回りしやすくなり、また、複合皮膜の厚みが７μｍを超えると、剥離が発生しやすくなり、着脱性能が悪くなる。 If the thickness of the composite film is less than 4 μm, the friction coefficient becomes high and it is easy to rotate together, and if the thickness of the composite film exceeds 7 μm, peeling tends to occur and the attachment / detachment performance deteriorates.
共回り防止手段は、めねじ部材としての袋ナットに設けられており、袋ナットに、２枚のスラストワッシャを収納する環状の凹所と、凹所開口に設けられてスラストワッシャを脱落しにくくする爪とが設けられていることがある。 The co-rotation prevention means is provided on the cap nut as the female screw member. The cap nut is provided with an annular recess for accommodating two thrust washers and the recess opening, so that the thrust washer is not easily dropped off. There may be a nail to be provided.
このようにすると、スラストワッシャが環状の凹所から脱落しにくいことから、繰り返し着脱を行った場合でも、スラストワッシャが適正位置に保持され、共回り性能の低下を防止することができる。 In this case, since the thrust washer is not easily dropped from the annular recess, the thrust washer is held at an appropriate position even when it is repeatedly attached and detached, and a reduction in the co-rotation performance can be prevented.
スラストワッシャは、円板状であってもよく、また、スラストワッシャは、円板状の一部が欠損したＣ状体であってもよい。 The thrust washer may be disk-shaped, and the thrust washer may be a C-shaped body with a part of the disk-shaped missing.
各継手部材は、内周が流体通路となる円筒状のスリーブ本体と、その突き合わせ端部に一体に設けられたフランジとからなる同一形状とされており、別体とされたおねじ部材と袋ナット（めねじ部材）とによって、両継手部材が結合されていることがあり、また、継手部材に一体に形成されたおねじ部と袋ナット（めねじ部材）とがねじ合わされることによって、両継手部材が結合されていることがある。 Each joint member has the same shape consisting of a cylindrical sleeve body having an inner periphery serving as a fluid passage and a flange integrally provided at the abutting end thereof. Both of the joint members may be coupled to each other by a nut (female thread member), and the male thread portion formed integrally with the joint member and the cap nut (female thread member) are screwed together, Both joint members may be joined.
この発明の流体継手によると、共回り防止手段は、２枚のスラストワッシャが重ね合わされることで形成されており、各スラストワッシャは、基材金属表面にＮｉ−Ｐ＋ＰＴＦＥ複合皮膜が形成されてかつ熱処理が施されたものであるので、着脱を繰り返しても、おねじ部材とめねじ部材とをねじ合わせていく時の共回り防止効果が低下しない。したがって、着脱を繰り返しても、継手のシール性を維持することができる。 According to the fluid coupling of the present invention, the co-rotation preventing means is formed by superimposing two thrust washers, and each thrust washer has a Ni-P + PTFE composite film formed on the base metal surface and Since the heat treatment is performed, even if the attachment and detachment are repeated, the corotation prevention effect when the male screw member and the female screw member are screwed together does not decrease. Therefore, the sealing performance of the joint can be maintained even when the attachment and detachment is repeated.
以下、図面を参照して、この発明の実施の形態について説明する。なお、以下の説明において、図１の左右を左右とする。 Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right in FIG.
図１は、この発明による流体継手の１実施形態を示しており、流体継手(1)は、互いに連通する流体通路を有している第１および第２の管状継手部材(2)(3)と、両継手部材(2)(3)間に介在させられた円環状ガスケット(4)と、ガスケット(4)を保持して自身が第１継手部材(2)に保持されるリテーナ(5)と、第１の継手部材(2)に嵌められた略円筒状のおねじ部材(6)と、第２の継手部材(3)に嵌められた略円筒状のめねじ部材(7)とを備えている。 FIG. 1 shows an embodiment of a fluid coupling according to the present invention. The fluid coupling (1) includes first and second tubular coupling members (2) and (3) having fluid passages communicating with each other. And an annular gasket (4) interposed between the joint members (2) and (3), and a retainer (5) which holds the gasket (4) and is held by the first joint member (2) A substantially cylindrical male screw member (6) fitted to the first joint member (2), and a substantially cylindrical female screw member (7) fitted to the second joint member (3). I have.
各継手部材(2)(3)は、内周が流体通路となる円筒状のスリーブ本体(11)(13)と、その突き合わせ端部に一体に設けられたフランジ(12)(14)とからなり、同一形状とされている。 Each joint member (2) (3) is composed of a cylindrical sleeve body (11) (13) having an inner periphery serving as a fluid passage, and a flange (12) (14) integrally provided at the abutting end portion thereof. And have the same shape.
ガスケット(4)は、ニッケル合金等の金属製とされ、これが両継手部材(2)(3)の突き合わせ端面間で塑性変形することでシール性を得るようになっている。ガスケット(4)の内径は、各継手部材(2)(3)の内径に等しくなされている。 The gasket (4) is made of a metal such as a nickel alloy, and this is plastically deformed between the butted end faces of both joint members (2) and (3) to obtain a sealing property. The inner diameter of the gasket (4) is made equal to the inner diameter of each joint member (2) (3).
スリーブ本体(11)(13)同士は、ガスケット(4)を介して対向し、フランジ(12)(14)同士は、その突き合わせ端面がスリーブ本体(11)(13)よりも突出し、適正な締付け状態では、突き合わせ端面間の隙間がゼロとされている。フランジ(12)(14)の突き合わせ端面には、リテーナ(5)を収めるための凹所(12a)(14a)が形成されている。 The sleeve bodies (11) and (13) face each other via the gasket (4), and the flanges (12) and (14) face each other with their butt end faces protruding from the sleeve bodies (11) and (13), so that proper tightening is possible. In the state, the gap between the butt end faces is zero. Recesses (12a) and (14a) for accommodating the retainer (5) are formed on the abutting end faces of the flanges (12) and (14).
ガスケット(4)とリテーナ(5)とは、互いに嵌め合わされるようになされており、リテーナ(5)は、ガスケット(4)を保持してフランジ(12)(14)の凹所(12a)(14a)に嵌め入れられているとともに、断面円形の金属製線材がＣ状に形成されたスナップリング(8)によって第１の継手部材(2)に保持されている。ガスケット(4)、リテーナ(5)およびスナップリング(8)によって、この流体継手(1)のシール手段が構成されている。 The gasket (4) and the retainer (5) are adapted to be fitted to each other, and the retainer (5) holds the gasket (4) and has the recess (12a) (12a) ( 14a) and a metal wire having a circular cross section is held on the first joint member (2) by a snap ring (8) formed in a C shape. The gasket (4), the retainer (5), and the snap ring (8) constitute a sealing means for the fluid coupling (1).
おねじ部材(6)は、円筒状の本体(15)と、本体(15)の右端面（突き合わせ端面）から右方（軸方向）に突出して両継手部材(2)(3)の突き合わせ部外周面を覆う円筒状カバー部(16)と、本体(15)の右端部（突き合わせ端部）の外周に設けられたおねじ部(17)と、本体(15)の左端部（反突き合わせ端部）の外周に設けられた六角係合部(18)とを有している。おねじ部材(6)は、第１継手部材(2)に左方から嵌められて、その本体(15)右面が第１継手部材(2)のフランジ(12)の左面に左方から当接させられている。 The male thread member (6) has a cylindrical main body (15) and a butted portion of both joint members (2) and (3) protruding from the right end face (butt end face) of the main body (15) to the right (axial direction). A cylindrical cover part (16) covering the outer peripheral surface, a male thread part (17) provided on the outer periphery of the right end part (butting end part) of the main body (15), and a left end part (anti-butting end) of the main body (15) A hexagonal engagement portion (18) provided on the outer periphery of the portion. The male screw member (6) is fitted to the first joint member (2) from the left side, and the right side of the main body (15) abuts the left side of the flange (12) of the first joint member (2) from the left side. It has been made.
めねじ部材(7)は、袋ナットと称されるもので、第２継手部材(3)に右方から嵌められている。めねじ部材(7)は、本体(19)と、本体(19)の右端部に設けられた内向きフランジ(20)とを有している。本体(19)の左端部の内周には、おねじ部材(6)のおねじ部(17)にねじ合わされているめねじ部(19a)が形成されている。内向きフランジ(20)は、第２継手部材(3)のスリーブ本体(13)の周囲にはめられて、第２継手部材(3)のフランジ(12)の右面に右方から当接させられている。 The female thread member (7) is called a cap nut and is fitted to the second joint member (3) from the right side. The female thread member (7) has a main body (19) and an inward flange (20) provided at the right end of the main body (19). On the inner periphery of the left end portion of the main body (19), a female screw portion (19a) is formed that is screwed to the male screw portion (17) of the male screw member (6). The inward flange (20) is fitted around the sleeve body (13) of the second joint member (3) and is brought into contact with the right surface of the flange (12) of the second joint member (3) from the right side. ing.
おねじ部材(6)のカバー部(16)の内径は、第１および第２継手部材(2)(3)のフランジ(12)の外径よりわずかに大きくされ、外径は、めねじ部材(7)の内径よりもわずかに小さくなされている。 The inner diameter of the cover part (16) of the male thread member (6) is slightly larger than the outer diameter of the flange (12) of the first and second joint members (2) and (3). It is made slightly smaller than the inner diameter of (7).
第２継手部材(3)のフランジ(14)とめねじ部材(7)の内向きフランジ(20)との間に共回り防止手段としての２枚のスラストワッシャ(9)(10)が介在させられている。 Two thrust washers (9) and (10) are interposed between the flange (14) of the second joint member (3) and the inward flange (20) of the female thread member (7) as a means for preventing co-rotation. ing.
めねじ部材(7)の内向きフランジ(20)左面には、図２に拡大して示すように、２枚のスラストワッシャ(9)(10)を収納する環状の凹所(21)が設けられており、この凹所(21)開口には、スラストワッシャ(9)(10)を脱落しにくくする爪(22)が設けられている。爪(22)は、凹所(21)の開口縁部の径が凹所(21)の径よりも小さくされることで形成されている。 On the left side of the inward flange (20) of the female thread member (7), there is an annular recess (21) that houses two thrust washers (9) and (10) as shown in an enlarged view in FIG. The opening of the recess (21) is provided with a claw (22) that makes it difficult for the thrust washers (9) and (10) to fall off. The claw (22) is formed by making the diameter of the opening edge of the recess (21) smaller than the diameter of the recess (21).
爪(22)によって、スラストワッシャ(9)(10)が環状の凹所(21)から脱落しにくいものとなっており、繰り返し着脱を行った場合でも、スラストワッシャ(9)(10)が適正位置に保持され、共回り性能の低下が防止される。 The thrust washers (9) and (10) are not easily removed from the annular recess (21) by the claws (22), and the thrust washers (9) and (10) are suitable even when they are repeatedly attached and detached. The position is held, and the reduction of the co-rotation performance is prevented.
各スラストワッシャ(9)(10)は、ステンレス鋼表面にＮｉ（ニッケル）−Ｐ（リン）＋ＰＴＦＥ（ポリテトラフルオロエチレン）複合皮膜が形成されてかつ熱処理が施されたものとされている。 Each of the thrust washers (9) and (10) is formed by forming a Ni (nickel) -P (phosphorus) + PTFE (polytetrafluoroethylene) composite film on the stainless steel surface and performing a heat treatment.
Ｎｉ−Ｐ＋ＰＴＦＥ複合皮膜は、金属皮膜（Ｎｉ−Ｐ皮膜）中に複合材としてのＰＴＦＥ超微粒子（粒子径０．１〜０．３μｍ）を含有（含有量：３０〜３５ｖｏｌ％）させることで、Ｎｉ−Ｐの析出に伴い、ＰＴＦＥ超微粒子が同時に共析した複合皮膜として得ることができる。 The Ni-P + PTFE composite film contains PTFE ultrafine particles (particle diameter 0.1 to 0.3 μm) as a composite material in a metal film (Ni-P film) (content: 30 to 35 vol%). With the precipitation of Ni-P, it can be obtained as a composite film in which PTFE ultrafine particles are simultaneously eutectoid.
熱処理は、大気雰囲気の熱風循環炉内において、設定温度を３３０℃として、１時間加熱するもので、これにより、Ｎｉ−Ｐの金属皮膜の硬度が上がるとともに、ＰＴＦＥが均一に分散し、摩擦係数が低くなる。 Heat treatment is performed in a hot-air circulating furnace in an air atmosphere at a set temperature of 330 ° C. for 1 hour. This increases the hardness of the Ni-P metal film and uniformly disperses PTFE, resulting in a coefficient of friction. Becomes lower.
表１に、本発明を得るに至った性能評価結果を示す。
表１において、Ａ、Ｂ、ＣおよびＤの４種類の表面処理について、共回り性能と着脱性能とを評価した結果を、良好であれば○、不十分であれば×で示している。Ａの表面処理は、Ｎｉ−Ｐ＋ＰＴＦＥ（５μｍ）複合皮膜（熱処理無し）であり、Ｂの表面処理は、Ｎｉ−Ｐ＋タングステン複合皮膜（熱処理有り）であり、Ｃの表面処理は、Ｎｉ−Ｐ＋ＰＴＦＥ（５μｍ）複合皮膜（熱処理有り）であり、Ｄの表面処理は、Ｎｉ−Ｐ＋ＰＴＦＥ（１０μｍ）複合皮膜（熱処理無し）である。各表面処理のスラストワッシャ(9)(10)について、１枚使用した場合および２枚使用した場合の両方について評価している。スラストワッシャ(9)(10)は、円板状とされている。 In Table 1, for the four types of surface treatments A, B, C, and D, the results of evaluating the co-rotation performance and the attachment / detachment performance are indicated by ◯ if good, and by x if insufficient. The surface treatment of A is a Ni—P + PTFE (5 μm) composite film (without heat treatment), the surface treatment of B is a Ni—P + tungsten composite film (with heat treatment), and the surface treatment of C is Ni—P + PTFE (with heat treatment). 5 μm) composite film (with heat treatment), and the surface treatment of D is Ni—P + PTFE (10 μm) composite film (without heat treatment). The thrust washers (9) and (10) for each surface treatment are evaluated both when one sheet is used and when two sheets are used. The thrust washers (9) and (10) are disk-shaped.
共回り性能は、締付け角度を５°から１００°まで徐々に増加していき、共回り角度を求め、各条件で共回り角度が５°未満の場合に良好と判定し、いずれかの条件で共回り角度が５°を超えたものは、不十分と判定した。 For the co-rotation performance, the tightening angle is gradually increased from 5 ° to 100 °, the co-rotation angle is obtained, and when the co-rotation angle is less than 5 ° under each condition, it is determined to be good. The case where the co-rotation angle exceeded 5 ° was determined to be insufficient.
表１から、Ａの表面処理では、１枚使用するだけでは、十分な共回り性能を得ることができないが、２枚使用することで、十分な共回り性能が得られることが分かる。また、Ｂの表面処理では、２枚使用しても、十分な共回り性能を得ることができないことが分かる。ＣおよびＤの表面処理では、１枚および２枚いずれの場合でも、十分な共回り性能を有していることが分かる。 From Table 1, it can be seen that in the surface treatment of A, it is not possible to obtain sufficient co-rotation performance by using only one sheet, but sufficient co-rotation performance can be obtained by using two sheets. Further, it can be seen that in the surface treatment of B, sufficient co-rotation performance cannot be obtained even when two sheets are used. It can be seen that the surface treatments C and D have sufficient co-rotation performance in both cases of one and two sheets.
着脱性能は、着脱を３０回繰り返して、共回り角度を求めたものである。ここでは、１回目の取付け時における共回り性能が良好なもの（Ａ２枚、Ｃ１枚、Ｃ２枚、Ｄ１枚およびＤ２枚）について、複数回の着脱を繰り返した場合に、どうなるかを評価した。 The attachment / detachment performance is obtained by repeating attachment / detachment 30 times to obtain a common rotation angle. Here, it was evaluated what happens when the attachment / detachment is repeated a plurality of times for the ones with good co-rotation performance at the first attachment (A2, C1, C2, D1, and D2).
着脱回数が５回を超えると、多くのケースで、共回り角度が大きくなることが分かり、表１から、Ｃの表面処理で枚数が２枚のものだけは、着脱を繰り返しても、共回り角度５°未満が維持されることが分かる。 When the number of attachments and detachments exceeds 5, the co-rotation angle increases in many cases, and Table 1 shows that the number of sheets with a surface treatment of C is only 2 even if the attachment / detachment is repeated. It can be seen that an angle of less than 5 ° is maintained.
なお、着脱性能については、着脱を繰り返した後の表面観察も行っており、バリや傷の発生、変形などについても、上記Ｃの表面処理で枚数が２枚のものは、良好な状態が維持されている。 Regarding the attachment / detachment performance, surface observation after repeated attachment / detachment is also performed, and the occurrence of burrs, scratches, deformation, etc. is maintained in a good state when the number of sheets is 2 by the surface treatment of C above. Has been.
したがって、共回り手段として、２枚のスラストワッシャ(9)(10)を使用するとともに、各スラストワッシャ(9)(10)をＮｉ−Ｐ＋ＰＴＦＥ（５μｍ）複合皮膜（熱処理有り）付きとすることで、着脱を繰り返しても、共回り性能が維持され、流体継手(1)のシール性が損なわれることがないものとできる。上記２枚のスラストワッシャ(9)(10)からなる共回り手段は、シール手段が上記に示した以外の構成の流体継手に対しても適用することができる。 Therefore, by using two thrust washers (9) and (10) as the co-rotating means, each thrust washer (9) and (10) is provided with a Ni-P + PTFE (5 μm) composite film (with heat treatment). Even if the attachment and detachment are repeated, the co-rotation performance is maintained and the sealing performance of the fluid coupling (1) is not impaired. The co-rotating means composed of the two thrust washers (9) and (10) can be applied to a fluid coupling having a configuration other than that shown above.
スラストワッシャ(9)(10)は、円板状であってもよく、また、スラストワッシャ(9)(10)は、円板状の一部が欠損したＣ状体であってもよい。 The thrust washers (9) and (10) may be disk-shaped, and the thrust washers (9) and (10) may be a C-shaped body in which a part of the disk shape is missing.
なお、複合皮膜の厚みが４μｍ未満であると、摩擦係数が高くなって、共回りしやすくなり、また、複合皮膜の厚みが７μｍを超えると、剥離が発生し着脱性能が悪くなることから、Ｎｉ−Ｐ＋ＰＴＦＥ（５μｍ）複合皮膜の厚みは、４〜７μｍであることが好ましい。 In addition, if the thickness of the composite film is less than 4 μm, the coefficient of friction becomes high and it is easy to rotate together, and if the thickness of the composite film exceeds 7 μm, peeling occurs and attachment / detachment performance deteriorates. The thickness of the Ni—P + PTFE (5 μm) composite film is preferably 4 to 7 μm.
(1)：流体継手、(2)(3)：継手部材、(6)：おねじ部材、(7)：袋ナット（めねじ部材）、(9)(10)：スラストワッシャ（共回り防止手段）、(21)：凹所、(22)：爪 (1): Fluid coupling, (2) (3): Fitting member, (6): Male thread member, (7): Cap nut (female thread member), (9) (10): Thrust washer (prevents co-rotation) Means), (21): recess, (22): nail
Claims (4)
共回り防止手段は、２枚のスラストワッシャが重ね合わされることで形成されており、各スラストワッシャは、表面にＮｉ−Ｐ＋ＰＴＦＥ複合皮膜が形成されたステンレス鋼の熱処理品であり、各スラストワッシャの複合皮膜の厚みが４〜７μｍとされていることを特徴とする流体継手。 A male screw member provided on one of the joint members, comprising a pair of joint members having fluid passages communicating with each other and a sealing means interposed between the butted end surfaces of both joint members In the fluid coupling in which the joint members are coupled to each other by the screw member because the joint member is provided on the other joint member, and the screw member and the joint member are prevented from co-rotating by the co-rotation preventing means including the thrust washer.
Co-rotation prevention means is formed by the two thrust washers are superimposed, the thrust washer, heat-treated product der of Ni-P + PTFE stainless steel composite film has been formed on the surface is, the thrust washer fluid coupling thickness of the composite coating is characterized that you have been a 4～7Myuemu.
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