JPH0115993Y2 - - Google Patents
Info
- Publication number
- JPH0115993Y2 JPH0115993Y2 JP1982001687U JP168782U JPH0115993Y2 JP H0115993 Y2 JPH0115993 Y2 JP H0115993Y2 JP 1982001687 U JP1982001687 U JP 1982001687U JP 168782 U JP168782 U JP 168782U JP H0115993 Y2 JPH0115993 Y2 JP H0115993Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pulsation
- spiral tube
- orifice
- connecting fitting
- 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
Links
- 230000010349 pulsation Effects 0.000 claims description 56
- 230000000694 effects Effects 0.000 description 24
- 238000010521 absorption reaction Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 210000002445 nipple Anatomy 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000002517 constrictor effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Pipe Accessories (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は新規な脈動吸収ホースに関する。さら
に詳しくはパワーステアリングユニツトのポンプ
から吐出される圧力油の脈動を効率よく吸収する
ことによつて、脈動により発生する騒音を完全に
防止しうる脈動吸収ホースに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a novel pulsation absorbing hose. More specifically, the present invention relates to a pulsation absorbing hose that can completely prevent noise caused by pulsations by efficiently absorbing pulsations in pressure oil discharged from a pump of a power steering unit.
［従来の技術］
パワーステアリングユニツトは通常第４図に示
されるように、圧力油を送出するポンプ５と、圧
力油によつて作動せられるギヤボツクスやシリン
ダなどの舵取装置６と、ポンプ５と舵取装置６と
を連通する高圧側ホース７および低圧側ホース８
とから構成される。このようなパワーステアリン
グユニツトはベーンポンプなどの容積型ポンプが
用いられるため高圧側ホース７に送出される圧力
油には圧力脈動が生じている。そして、この脈動
が空気に伝播して騒音が発生し、また配管を伝播
して舵取装置６などを振動させる。さらに舵取装
置６などの振動がより騒音を大きくし、いちじる
しいときには舵取装置６の作動が不安定になるな
どの問題を生ぜしめる。[Prior Art] As shown in FIG. 4, a power steering unit usually includes a pump 5 that delivers pressure oil, a steering device 6 such as a gearbox or cylinder operated by the pressure oil, and the pump 5. A high pressure side hose 7 and a low pressure side hose 8 communicating with the steering device 6
It consists of Since such a power steering unit uses a positive displacement pump such as a vane pump, pressure pulsations occur in the pressure oil sent to the high pressure side hose 7. Then, this pulsation propagates to the air and generates noise, and also propagates through the piping and vibrates the steering device 6 and the like. Furthermore, the vibrations of the steering device 6 and the like make more noise, and in severe cases, the operation of the steering device 6 becomes unstable.
このような問題を解決するため、従来から本出
願人により実開昭54−165829号公報や実開昭54−
146411号公報に記載された脈動吸収ホースが提案
されている。 In order to solve such problems, the present applicant has published U.S. Pat.
A pulsation absorbing hose described in Japanese Patent No. 146411 has been proposed.
実開昭54−165829号公報に記載された脈動吸収
ホース（以下、従来例という）は、ポンプの吐
出口に接続される接続金具にスパイラル管を接続
したものである。また実開昭54−146411号公報に
記載された脈動吸収ホース（以下、従来例とい
う）は、ポンプの吐出口に接続される接続金具お
よび舵取装置の供給口に接続される接続金具のそ
れぞれの内部にオリフイス部材が形成され、さら
に可撓管の内部にもオリフイス部材を挿入したも
のである。 The pulsation absorbing hose described in Japanese Utility Model Application Publication No. 54-165829 (hereinafter referred to as the conventional example) has a spiral pipe connected to a connecting fitting connected to a discharge port of a pump. In addition, the pulsation absorbing hose described in Japanese Utility Model Application Publication No. 54-146411 (hereinafter referred to as the conventional example) has a connection fitting connected to the discharge port of the pump and a connection fitting connected to the supply port of the steering device. An orifice member is formed inside the flexible tube, and the orifice member is also inserted inside the flexible tube.
［考案が解決しようとする課題］
前記従来例の脈動吸収ホースでは、スパイラ
ル管の隙間や穿孔によつて圧力油の一部を絞り、
それによつて絞られた圧力油の圧力波とスパイラ
ル管の内部を通り抜けて絞られていない圧力油の
圧力波との間に位相差を生ぜしめている。このよ
うにして位相差が生じた圧力波がスパイラル管の
出口から先で合流したとき、たがいに干渉して圧
力波が平滑化される。[Problem to be solved by the invention] In the conventional pulsation absorbing hose, a part of the pressure oil is squeezed through gaps and perforations in the spiral pipe,
This creates a phase difference between the pressure waves of the compressed pressure oil and the pressure waves of the unrestricted pressure oil passing through the inside of the spiral tube. When the pressure waves, which have a phase difference in this manner, merge at the outlet of the spiral tube, they interfere with each other and the pressure waves are smoothed.
しかしながらこの従来例でも脈動の吸収が充
分でないばあいがある。 However, even with this conventional example, pulsation absorption may not be sufficient in some cases.
つぎに前記従来例の脈動吸収ホースでは、３
個のオリフイス部材で圧力油の全部を段階的に絞
つていき、それにより脈動を平滑化している。こ
の従来例でも脈動の吸収が充分でないという問
題があるが、さらにホースの中間に入れられるオ
リフイスを外部からかしめて固定するのに正確な
位置決めが必須とされるので、製造が非常に困難
であるという問題がある。 Next, in the conventional pulsation absorbing hose, 3
All of the pressure oil is gradually squeezed using individual orifice members, thereby smoothing out pulsations. This conventional example also has the problem of insufficient absorption of pulsation, but it is also extremely difficult to manufacture because accurate positioning is required to caulk and fix the orifice inserted in the middle of the hose from the outside. There is a problem.
本考案はかかる事情に鑑み、より効果的に脈動
を吸収することができ、かつ製造が容易な脈動吸
収ホースを提供することを目的とする。 In view of the above circumstances, it is an object of the present invention to provide a pulsation absorbing hose that can absorb pulsation more effectively and is easy to manufacture.
［課題を解決するための手段］
本考案は、パワーステアリングユニツトのポン
プの吐出口に一端を接続するための第１の接続金
具と、ポンプから吐出される圧力油によつて作動
せられる舵取装置の供給口に一端を接続するため
の第２の接続金具と、前記第１の接続金具および
第２の接続金具のそれぞれの他端に接続される可
撓管と、第１の接続金具に形成された、スパイラ
ル管の内径よりも小さい内径のオリフイス部と、
前記第１の接続金具の他端に入口側端部が嵌入さ
れ、前記可撓管内に配置されるスパイラル管とか
らなり、かつ前記スパイラル管の入口側端部が前
記オリフイス部の出口側端部に近接して配置され
てなるパワーステアリングユニツト用の脈動吸収
ホースを要旨とするものである。[Means for Solving the Problems] The present invention includes a first connecting fitting for connecting one end to a discharge port of a pump of a power steering unit, and a steering wheel operated by pressure oil discharged from the pump. a second connecting fitting for connecting one end to the supply port of the device; a flexible tube connected to the other ends of each of the first connecting fitting and the second connecting fitting; an orifice portion having an inner diameter smaller than the inner diameter of the spiral tube;
an inlet side end fitted into the other end of the first connection fitting, and a spiral tube disposed within the flexible tube, and the inlet side end of the spiral tube is the outlet side end of the orifice section. The gist of this invention is a pulsation absorbing hose for a power steering unit, which is arranged close to the pulsation absorbing hose for a power steering unit.
［作用］
本考案におけるオリフイス部はそれ自体は公知
の構成であるが、つぎの点に技術的意義が存す
る。[Function] The orifice portion in the present invention has a known configuration per se, but has technical significance in the following points.
まず、オリフイス部単体での脈動に対する作用
に着目すると、絞り作用により脈動波形の高さ
を抑制する、オリフイス入口の壁面で生ずる
渦、反射により脈動波形の乱れを起こす、の二つ
の作用がある。以上のうち、の波形撹乱作用は
影響が小さい。なぜならば、この波形撹乱の影響
はオリフイスを出ると比較的早期に消えてゆくか
らである。したがつて、前記の波形撹乱作用
は、これまではほとんど着目されておらず、通
常、オリフイスを用いた脈動吸収ホースではもつ
ぱらの絞り作用による波形平滑化を期待して構
成されていた。 First, focusing on the effect of the orifice unit on pulsation, there are two effects: suppressing the height of the pulsation waveform by a restricting action, and causing disturbance of the pulsation waveform due to vortices and reflections generated on the wall surface of the orifice entrance. Of the above, the effect of waveform disturbance is small. This is because the effects of this waveform disturbance disappear relatively quickly after exiting the orifice. Therefore, the waveform disturbance effect described above has not received much attention so far, and pulsation absorbing hoses using orifices have usually been constructed with the expectation that the waveform will be smoothed by the constriction effect.
しかるに、本考案は前記の波形撹乱作用に着
目した点に特徴がある。すなわち、オリフイスの
出口側に近接してスパイラル管を配置したとき
は、オリフイスの入口で生じた渦や反射波が消え
ないうちにスパイラル管に流入するので、オリフ
イスによる波形撹乱作用とスパイラル管による波
形干渉が同時的に作用し合うことになる。その結
果、オリフイスによる波形撹乱とスパイラル管に
よる波形干渉が別々に作用するものに比べると、
はるかに脈動吸収効果が高く、かつ脈動を吸収で
きる周波数帯が広くなるのである。 However, the present invention is characterized in that it focuses on the waveform disturbance effect described above. In other words, when the spiral tube is placed close to the outlet side of the orifice, the vortices and reflected waves generated at the entrance of the orifice flow into the spiral tube before disappearing, so the waveform disturbance effect by the orifice and the waveform by the spiral tube are Interferences will act simultaneously. As a result, compared to the case where the waveform disturbance by the orifice and the waveform interference by the spiral tube act separately,
The pulsation absorption effect is much higher, and the frequency band in which pulsation can be absorbed becomes wider.
つぎに、本考案の脈動吸収作用を第５〜６図に
基づき詳細に説明する。 Next, the pulsation absorbing effect of the present invention will be explained in detail based on FIGS. 5 and 6.
ポンプから吐出された高圧油はほぼ正弦波形の
圧力波であり、オリフイス部１ｅより上流におい
ては、そのままの圧力波形Ｃで流れている。 The high pressure oil discharged from the pump has a substantially sinusoidal pressure wave, and flows with the same pressure waveform C upstream from the orifice portion 1e.
オリフイス部１ｅの直前に達すると、一部の圧
力油がオリフイス部１ｅの壁に当つて反射し、そ
の反射波γが上流から流れてくる圧力波Ｃと衝突
して、最初の波形干渉を生ずる。このようにして
できた波形が圧力波ｄであり波形干渉により、当
然波形の高さ（すなわち圧力）は若干弱められ
る。同時に、オリフイス部１ｅの直前において
は、流路断面積が急変しているので偶の所に渦ｖ
が発生し、圧力油の流れを撹乱する。理論上は前
記波形干渉と、渦による波形撹乱は別々に考えら
れるが、実際上は同時に生ずるので、オリフイス
部１ｅを通る圧力油は、波形Ｄで示されるよう
な、大きな波に小さな波が重畳した相当乱れた圧
力波形を有するようになる（以下、波形撹乱とい
う）。 When it reaches just before the orifice part 1e, some of the pressure oil hits the wall of the orifice part 1e and is reflected, and the reflected wave γ collides with the pressure wave C flowing from upstream, causing the first waveform interference. . The waveform created in this way is the pressure wave d, and naturally the height of the waveform (that is, the pressure) is slightly weakened due to waveform interference. At the same time, just before the orifice part 1e, the cross-sectional area of the flow path changes suddenly, so a vortex v.
occurs and disturbs the flow of pressure oil. Theoretically, the waveform interference and the waveform disturbance due to vortices can be considered separately, but in practice they occur at the same time, so the pressure oil passing through the orifice 1e is a large wave with a small wave superimposed on it, as shown by waveform D. This results in a considerably disturbed pressure waveform (hereinafter referred to as waveform disturbance).
ついで、スパイラル管４の中には、このように
して波形が撹乱された圧力油Ｄが流れ込む。スパ
イラル管４は圧力の高低に応じて隙間が開閉する
ので、一部の圧力は内部から外部に流れでる。ス
パイラル管４の外部（すなわち、スパイラル管４
外周と可撓管３内周の間の空間）に出た圧力油Ｅ
はスパイラル管で絞られたことによる圧力損失
と、流路がスパイラル管４内部をそのまま通り抜
ける圧力油よりも長くなることから圧力波の位相
が遅れる。 Then, the pressure oil D whose waveform has been disturbed in this way flows into the spiral pipe 4. Since the gap in the spiral tube 4 opens and closes depending on the level of pressure, a part of the pressure flows from the inside to the outside. The outside of the spiral tube 4 (i.e. the spiral tube 4
Pressure oil E released into the space between the outer circumference and the inner circumference of the flexible tube 3
The phase of the pressure wave is delayed due to the pressure loss caused by being constricted by the spiral tube and because the flow path is longer than the pressure oil that passes through the inside of the spiral tube 4 as it is.
なお、位相遅れが生ずる理由を第６図により説
明すれば、つぎのとおりである。すなわち、スパ
イラル管４内部のある位置とスパイラル管４か
ら出た位置との間において、圧力油Ｄは直線距
離（すなわち最短距離）を進むが、スパイラル管
４の隙間を通る圧力油Ｅは隙間を通る部分４ａで
斜めに迂回しなければならないので到達経路は長
くなる。そして圧力油の進行速度は同じなので、
スパイラル管４出口における圧力波の位相は圧力
油Ｅのそれが圧力油Ｄよりも遅れることになる。
これが、位相遅れの生ずる理由である。 The reason why the phase delay occurs is explained below with reference to FIG. That is, between a certain position inside the spiral pipe 4 and a position exiting from the spiral pipe 4, the pressure oil D travels a straight line distance (that is, the shortest distance), but the pressure oil E passing through the gap in the spiral pipe 4 travels through the gap. Since it is necessary to take a diagonal detour at the passing portion 4a, the arrival route becomes long. Since the pressure oil travels at the same speed,
The phase of the pressure wave at the outlet of the spiral pipe 4 is such that the pressure wave of the pressure oil E lags that of the pressure oil D.
This is the reason why phase lag occurs.
さて再び第５図に基づき説明すると、スパイラ
ル管４の出口において、圧力波Ｄと位相の遅れて
いる圧力波Ｅとが合流するが、ここで互いに衝突
するので、波形干渉が生ずる。その結果生ずるの
が波形Ｆであるが、この波形Ｆは圧力波Ｄ，Ｅが
たがいの圧力波形を打ち消し合うので、相当波形
の高さ（すなわち圧力）が弱められる。 Now, referring again to FIG. 5, at the exit of the spiral tube 4, the pressure wave D and the pressure wave E, which is delayed in phase, join together, but there they collide with each other, resulting in waveform interference. As a result, a waveform F is generated, and since the pressure waves D and E cancel each other out, the height (that is, the pressure) of the corresponding waveform is weakened.
以上のごとく本考案においては、波形撹乱と波
形干渉が相乗的に生じるので、高度に脈動が吸収
され、しかも脈動吸収ができる周波数帯が広くな
る。 As described above, in the present invention, since waveform disturbance and waveform interference occur synergistically, pulsation is absorbed to a high degree, and the frequency band in which pulsation can be absorbed is widened.
［実施例］
以下、図面を用いて本考案の脈動吸収ホースを
説明する。[Example] The pulsation absorbing hose of the present invention will be described below with reference to the drawings.
第１図は本考案の脈動吸収ホースの一実施例を
示す断面図、第２図は脈動吸収の効果を測定する
ための測定装置のブロツク図、第３図は第２図の
測定装置により測定した結果を示す脈動圧吸収度
グラフ、第４図はパワーステアリングユニツトの
ブロツク図、第５図は本考案の脈動吸収原理を説
明するための説明図、第６図はスパイラル管によ
り生ずる圧力波の位相遅れを説明するための説明
図、第７図は本考案の脈動吸収効果を脈動圧力よ
りみたグラフである。 Fig. 1 is a sectional view showing an embodiment of the pulsation absorbing hose of the present invention, Fig. 2 is a block diagram of a measuring device for measuring the effect of pulsation absorption, and Fig. 3 is a measurement using the measuring device shown in Fig. 2. Figure 4 is a block diagram of the power steering unit, Figure 5 is an explanatory diagram to explain the pulsation absorption principle of the present invention, and Figure 6 is a graph showing the pressure waves generated by the spiral pipe. FIG. 7, which is an explanatory diagram for explaining the phase delay, is a graph showing the pulsation absorption effect of the present invention in terms of pulsation pressure.
第１図において、１はポンプ５の吐出口Ａに一
端が接続される第１の接続金具、２は従動装置で
あるパワーステアリング装置のギヤボツクス６の
圧力油の供給口Ｂに一端が接続される第２の接続
金具３は第１の接続金具１と第２の接続金具２と
のそれぞれ他端外周に一端と他端とが接続される
可撓管である。前記第１の接続金具１と第２の接
続金具２はそれぞれパイプ部材１ａ，２ａとパイ
プ部材１ａ，２ａの一端に取りつけられるニツプ
ル１ｂ，２ｂと、該ニツプル１ｂ，２ｂのまわり
に可撓管を介して締着されるソケツト１ｃ，２ｃ
とからなつている。４は入口側端部がニツプル１
ｂの内孔にしつかりと嵌入されているスパイラル
管である。スパイラル管４はこのように取りつけ
られることにより、その出口側端部を第２の接続
金具２の方に向けて可撓管３の内部に配置されて
いる。スパイラル管４は金属または合成樹脂など
の弾性を有する１本または複数本の素材を密にら
せん巻きしてなる管状のものであり、となりあう
ループどうしがそれぞれの弾力性で密接されてい
る。また前記ニツプル１ｂには内孔１ｄの一部が
細くされてなるオリフイス部１ｅが形成されてお
り、オリフイス部１ｅの両端はそれぞれテーパ状
に拡がり、前記内孔１ｄの内壁にいたるように形
成されている。このオリフイス部１ｅの内径はス
パイラル管４の内径よりも小径であり、オリフイ
ス部１ｅの入口側の壁は渦や反射波を生ずるに充
分な壁面をもつている。 In FIG. 1, 1 is a first connecting fitting whose one end is connected to a discharge port A of a pump 5, and 2 is a first connecting fitting whose one end is connected to a pressure oil supply port B of a gear box 6 of a power steering device which is a driven device. The second connecting fitting 3 is a flexible tube whose one end and the other end are connected to the outer circumferences of the other ends of the first connecting fitting 1 and the second connecting fitting 2, respectively. The first connecting fitting 1 and the second connecting fitting 2 each include a pipe member 1a, 2a, a nipple 1b, 2b attached to one end of the pipe member 1a, 2a, and a flexible tube around the nipple 1b, 2b. sockets 1c and 2c that are tightened through
It is made up of. 4 has nipple 1 at the inlet side end.
This is a spiral tube firmly inserted into the inner hole of b. By being attached in this manner, the spiral tube 4 is placed inside the flexible tube 3 with its outlet side end facing toward the second connecting fitting 2. The spiral tube 4 is a tube-shaped tube formed by closely spirally winding one or more elastic materials such as metal or synthetic resin, and adjacent loops are closely connected to each other due to their respective elasticities. Further, the nipple 1b is formed with an orifice portion 1e formed by narrowing a part of the inner hole 1d, and both ends of the orifice portion 1e are each tapered and formed to reach the inner wall of the inner hole 1d. ing. The inner diameter of this orifice portion 1e is smaller than the inner diameter of the spiral tube 4, and the wall on the entrance side of the orifice portion 1e has a wall surface sufficient to generate vortices and reflected waves.
前記スパイラル管４の入口側端部はオリフイス
部１ｅの出口側端部に近接して配置されている。
ここでいう「近接して」の意味は、「オリフイス
部１ｅで生じた波形撹乱が消滅しないうちに圧力
油がスパイラル管４内に流入するのに十分なだけ
接近して」という意味である。したがつて、スパ
イラル管４の入口側端部とオリフイス部１ｅの出
口側端部はできるだけ近く接近するのが好まし
く、接していてもよいものである。 The inlet side end of the spiral tube 4 is arranged close to the outlet side end of the orifice portion 1e.
Here, "closely" means "close enough for the pressure oil to flow into the spiral pipe 4 before the wave disturbance generated at the orifice portion 1e disappears." Therefore, it is preferable that the inlet side end of the spiral tube 4 and the outlet side end of the orifice portion 1e approach each other as closely as possible, and may even be in contact with each other.
叙上のごとく構成される脈動吸収ホースを第４
図に示されるようなパワーステアリングユニツト
の高圧側ホース７に採用すれば、ポンプ５から流
出される脈動圧を伴なう圧力油は、既述のごとく
オリフイス部１ｅで生じた反射波や渦による波形
撹乱と、スパイラル管４出口における波形干渉と
によつて、効果的に減衰される。このように本考
案の脈動吸収ホースは、オリフイス部１ｅとスパ
イラル管４とがたがいに協動し、また脈動を吸収
する効果が相乗的に働くためきわめて顕著な脈動
吸収効果を奏しうる。 The fourth pulsation absorbing hose constructed as described above
If the hose 7 on the high pressure side of the power steering unit as shown in the figure is adopted, the pressure oil with pulsating pressure flowing out from the pump 5 will be affected by the reflected waves and vortices generated at the orifice portion 1e as described above. It is effectively attenuated by waveform disturbance and waveform interference at the exit of the spiral tube 4. As described above, in the pulsation absorbing hose of the present invention, the orifice portion 1e and the spiral tube 4 cooperate with each other, and the pulsation absorbing effect works synergistically, so that a very remarkable pulsation absorption effect can be achieved.
つぎに実施例をあげて本考案の脈動吸収ホース
の効果を説明する。 Next, the effects of the pulsation absorbing hose of the present invention will be explained with reference to examples.
実施例
内径3.8mm、長さ20mmのオリフイス部１ｅが形
成されてなるニツプル１ｂと、パイプ部材１ａ
と、ソケツト１ｃとからなる第１の接続金具１
と、オリフイス部が形成されていないほかは第１
の接続金具と同様な第２の接続金具２と、外径21
mm、内径10mm、長さ400mmのナイロンブレードホ
ースである可撓管３と、外径6.4mm、内径4.1mm、
長さ200mmのスパイラル管４を用いて第１図に示
されるような脈動吸収ホースを構成し、試料とし
た。Example A nipple 1b formed with an orifice portion 1e having an inner diameter of 3.8 mm and a length of 20 mm, and a pipe member 1a
and a socket 1c.
, except that the orifice part is not formed.
A second connection fitting 2 similar to the connection fitting 2 with an outer diameter of 21
The flexible tube 3 is a nylon braided hose with an inner diameter of 10 mm and a length of 400 mm, an outer diameter of 6.4 mm, an inner diameter of 4.1 mm,
A pulsation absorbing hose as shown in FIG. 1 was constructed using a spiral tube 4 having a length of 200 mm, and was used as a sample.
比較例 １
実施例と同様のナイロンブレードホースである
可撓管の両端に実施例の第２の接続金具と同様の
接続金具を固着し、試料とした。Comparative Example 1 Connecting fittings similar to the second connecting fitting of the example were fixed to both ends of a flexible tube, which was a nylon braided hose similar to that of the example, and used as a sample.
比較例 ２
比較例１の試料におけるホース内部に内径４
mm、長さ40mmのオリフイス部材を挿入し、ホース
外部に挿通したかしめ部材とともにかしめること
により固着し、試料とした。Comparative Example 2 The inner diameter of the hose in the sample of Comparative Example 1 was 4.
An orifice member with a length of 40 mm and a length of 40 mm was inserted and fixed by caulking with a caulking member inserted into the outside of the hose, and used as a sample.
比較例 ３
第１の接続金具にオリフイス部を形成しないほ
かは実施例と同様の脈動吸収ホースを作製し、試
料とした。Comparative Example 3 A pulsation absorbing hose similar to that of the example except that the orifice portion was not formed in the first connecting fitting was produced and used as a sample.
叙上のごとく構成される４種類の試料を第２図
に示される測定装置により脈動吸収効果を測定し
た。測定装置はモータＭにより回転されるポンプ
Ｐ（10枚羽根のベーンポンブ）の吐出口と測定ブ
ロツクBKを試料Ｓで接続し、さらにギヤボツク
スＧに連通し、ギヤボツクスＧからポンプＰがと
りつけられているタンクＴへリターンホースＲに
より戻されるという閉ループの管路構成とした。
このような管路に対し、圧力変換器ＨをポンプＰ
吐出口直後、および試料の直後に配置した。それ
らの測定装置の脈動圧を電気信号に変換したの
ち、チヤージアンプCA１，CA２で増幅し、２チ
ヤンネルFFTアナライザＦおよびＸ−Ｙレコー
ダＸで分析、記録した。このときの測定条件は、
ポンプ回転数900rpm、負荷圧力40Kg／cm2、油温
80℃である。 The pulsation absorption effect of four types of samples constructed as described above was measured using the measuring device shown in FIG. The measuring device connects the discharge port of a pump P (vane pump with 10 blades) rotated by a motor M to a measuring block BK through a sample S, which is further connected to a gearbox G, and from the gearbox G to a tank to which the pump P is attached. A closed loop pipe configuration was adopted in which the pipe was returned to T by a return hose R.
For such pipelines, the pressure transducer H is connected to the pump P.
It was placed immediately after the discharge port and immediately after the sample. After converting the pulsating pressures of these measurement devices into electrical signals, they were amplified by charge amplifiers CA1 and CA2, and analyzed and recorded by a 2-channel FFT analyzer F and an X-Y recorder X. The measurement conditions at this time are:
Pump rotation speed 900rpm, load pressure 40Kg/ cm2 , oil temperature
It is 80℃.
叙上のごとく測定した結果から求めた脈動減衰
度を第３図に示す。第３図のグラフから、実施例
の試料については、比較例１，２および３に比し
て脈動吸収効果が向上しているのがわかる。ま
た、すべての周波数帯で実施例による減衰効果が
顕著であることがわかる。 Figure 3 shows the degree of pulsation attenuation determined from the measurement results as described above. From the graph of FIG. 3, it can be seen that the pulsation absorption effect of the samples of the example is improved compared to comparative examples 1, 2, and 3. Furthermore, it can be seen that the attenuation effect according to the example is significant in all frequency bands.
つぎに、本考案の脈動吸収効果を圧力レベルで
みるための実験を行つた。用いた試料は前記実施
例および比較例３であり、実施例におけるオリフ
イス部１ｅの入口、出口およびスパイラル管４の
出口、比較例３（オリフイス部がなくスパイラル
管だけのもの）のスパイラル管の出口の合計４カ
所で圧力変換器Ｈを用い圧力を計測した。結果を
第７図に示す。同図において、線Ｊはオリフイス
部１ｅの入口で計測した入力波の圧力を示す。線
Ｋは前記オリフイス部１ｅを通過した直後の圧力
を示す。線Ｌは比較例３においてスパイラル管の
みを通過した後の圧力を示す。線Ｉは前記実施例
においてスパイラル管４を通過した後の圧力を示
す。 Next, we conducted an experiment to examine the pulsation absorption effect of the present invention at the pressure level. The samples used were the above-mentioned Example and Comparative Example 3, including the inlet and outlet of the orifice portion 1e and the outlet of the spiral tube 4 in the Example, and the outlet of the spiral tube in Comparative Example 3 (no orifice portion and only the spiral tube). Pressure was measured using pressure transducer H at a total of four locations. The results are shown in FIG. In the figure, a line J indicates the pressure of the input wave measured at the entrance of the orifice portion 1e. Line K indicates the pressure immediately after passing through the orifice portion 1e. Line L indicates the pressure after passing only through the spiral tube in Comparative Example 3. Line I shows the pressure after passing through the spiral tube 4 in the example described above.
以上の結果から、本考案においてはオリフイス
のみを用いたばあい（線Ｋが示す）やスパイラル
管のみを用いたばあい（線Ｌが示す）に比べて脈
動圧力を大きく低減していることが判る。 From the above results, it is clear that the present invention significantly reduces pulsating pressure compared to using only an orifice (indicated by line K) or using only a spiral tube (indicated by line L). I understand.
また、オリフイス（線Ｋ）やスパイラル管（線
Ｌ）単独のものが、周波数250Hz以下では脈動吸
収効果が低いのに比べ、本考案（線）では周波
数250Hz以下でも脈動吸収効果が高く、脈動を吸
収しうる周波数帯が広いことがわかる。 In addition, compared to the orifice (line K) or spiral tube (line L), which have a low pulsation absorption effect at frequencies below 250Hz, the present invention (line) has a high pulsation absorption effect even at frequencies below 250Hz, reducing pulsation. It can be seen that the frequency band that can be absorbed is wide.
［考案の効果］
本考案は、脈動吸収効果が高く、しかも脈動を
吸収しうる周波数帯が広い。そして、本考案の脈
動吸収ホースを採用したパワーステアリング装置
は、実際にポンプの騒音がきわめて低減されたも
のであつた。またホースの途中にかしめて固定す
る部材をまつたく用いていないので、製造上の位
置決めに困難な問題を生じず製造が容易である。[Effects of the invention] The present invention has a high pulsation absorption effect and a wide frequency band in which pulsation can be absorbed. In the power steering device employing the pulsation absorbing hose of the present invention, pump noise was actually extremely reduced. In addition, since no member is used to fix the hose by caulking, there is no problem in positioning the hose, and manufacturing is easy.
第１図は本考案の脈動吸収ホースの一実施例を
示す断面図、第２図は脈動吸収の効果を測定する
ための測定装置のブロツク図、第３図は第２図の
測定装置により測定した結果を示す脈動圧吸収度
グラフ、第４図はパワーステアリングユニツトの
ブロツク図、第５図は本考案の脈動吸収原理を説
明するための説明図、第６図はスパイラル管によ
り生ずる圧力波の位相遅れを説明するための説明
図、第７図は本考案の脈動吸収効果を脈動圧力よ
りみたグラフ。
図面の主要符号、１……第１の接続金具、１ｅ
……オリフイス部、２……第２の接続金具、３…
…可撓管、４……スパイラル管、５……ポンプ、
６……従動装置。
Fig. 1 is a sectional view showing an embodiment of the pulsation absorbing hose of the present invention, Fig. 2 is a block diagram of a measuring device for measuring the effect of pulsation absorption, and Fig. 3 is a measurement using the measuring device shown in Fig. 2. Figure 4 is a block diagram of the power steering unit, Figure 5 is an explanatory diagram to explain the pulsation absorption principle of the present invention, and Figure 6 is a graph showing the pressure waves generated by the spiral pipe. An explanatory diagram for explaining the phase delay, and FIG. 7 is a graph showing the pulsation absorption effect of the present invention in terms of pulsation pressure. Main symbols in the drawing: 1...first connection fitting, 1e
... Orifice part, 2 ... Second connection fitting, 3 ...
...Flexible tube, 4...Spiral tube, 5...Pump,
6...Following device.
Claims (1)
に一端を接続するための第１の接続金具と、ポン
プから吐出される圧力油によつて作動せられる舵
取装置の供給口に一端を接続するための第２の接
続金具と、前記第１の接続金具および第２の接続
金具のそれぞれの他端に接続される可撓管と、第
１の接続金具に形成された、スパイラル管の内径
よりも小さい内径のオリフイス部と、前記第１の
接続金具の他端に入口側端部が嵌入され、前記可
撓管内に配置されるスパイラル管とからなり、か
つ前記スパイラル管の入口側端部が前記オリフイ
ス部の出口側端部に近接して配置されてなるパワ
ーステアリングユニツト用の脈動吸収ホース。 A first connecting fitting for connecting one end to a discharge port of a pump of a power steering unit, and a second connecting fitting for connecting one end to a supply port of a steering device operated by pressure oil discharged from the pump. a flexible tube connected to the other ends of the first connecting fitting and the second connecting fitting, and a flexible tube having an inner diameter smaller than the inner diameter of the spiral tube formed in the first connecting fitting. It consists of an orifice part, and a spiral tube whose inlet side end is fitted into the other end of the first connecting fitting and which is disposed within the flexible tube, and the inlet side end of the spiral tube is connected to the orifice part. A pulsation absorbing hose for the power steering unit that is placed close to the outlet end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP168782U JPS58104483U (en) | 1982-01-08 | 1982-01-08 | Pulsation absorption hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP168782U JPS58104483U (en) | 1982-01-08 | 1982-01-08 | Pulsation absorption hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58104483U JPS58104483U (en) | 1983-07-15 |
| JPH0115993Y2 true JPH0115993Y2 (en) | 1989-05-11 |
Family
ID=30014693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP168782U Granted JPS58104483U (en) | 1982-01-08 | 1982-01-08 | Pulsation absorption hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58104483U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS631896A (en) * | 1986-06-18 | 1988-01-06 | 東京瓦斯株式会社 | Smoothing mechanism of pulsating flow |
| US8151804B2 (en) | 2008-12-23 | 2012-04-10 | Williams Jonnie R | Tobacco curing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54146411U (en) * | 1978-04-03 | 1979-10-11 | ||
| JPS54165829U (en) * | 1978-05-15 | 1979-11-21 |
-
1982
- 1982-01-08 JP JP168782U patent/JPS58104483U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58104483U (en) | 1983-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5905207A (en) | Process for measuring the flow rate of a fluid | |
| JP5773414B2 (en) | Ultrasonic flowmeter silencer and ultrasonic flowmeter with silencer | |
| US20030115969A1 (en) | Ultrasonic flow meter | |
| US7073534B2 (en) | Silencer for perforated plate flow conditioner | |
| JPH071075B2 (en) | Pulsation reducing hose manufacturing method | |
| US4104915A (en) | Ultrasonic device for the determination of the rate of air flow in the inlet duct of an internal combustion engine | |
| US20150060192A1 (en) | Exhaust system having a system for removing condensate | |
| US2993559A (en) | Fluid surge alleviator | |
| US6490933B2 (en) | Ultrasonic flow meter with reduced noise | |
| US6338277B1 (en) | Flowmeter for attenuating acoustic propagations | |
| US6158472A (en) | Apparatus for damping a pulsation of a fluid conveyed through a conveying device | |
| JPS6010238B2 (en) | Pulsation prevention device for air fluid inside piping system | |
| JPH0115993Y2 (en) | ||
| KR20010034606A (en) | Gas meter dust filter | |
| US2570241A (en) | Pulsation dampener | |
| JPS643037Y2 (en) | ||
| CN214541557U (en) | Noise eliminator and air conditioner | |
| JPS616494A (en) | Pulsation absorbing hose | |
| US2517623A (en) | Muffler including tapered inlet nozzle with tapered opening | |
| JPS5946817A (en) | Noise attenuator | |
| JP3041265B2 (en) | Duct resonance prevention structure | |
| JP4476705B2 (en) | Silencer mechanism | |
| JPH0762446B2 (en) | Silencer | |
| JP6474659B2 (en) | Ultrasonic flow meter with silencer | |
| RU2776170C1 (en) | Pulsation dampener - silencer for positive displacement compressors |