JP2010167417A - Liquid trap apparatus for gas - Google Patents

Liquid trap apparatus for gas Download PDF

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Publication number
JP2010167417A
JP2010167417A JP2010058307A JP2010058307A JP2010167417A JP 2010167417 A JP2010167417 A JP 2010167417A JP 2010058307 A JP2010058307 A JP 2010058307A JP 2010058307 A JP2010058307 A JP 2010058307A JP 2010167417 A JP2010167417 A JP 2010167417A
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filter element
gas
liquid
end wall
trap
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JP5342480B2 (en
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Yoji Nakajima
要治 中島
Hiroaki Yamamoto
博暁 山本
Takashi Yoshida
崇 吉田
Hiroyuki Goto
博之 後藤
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Honda Motor Co Ltd
Keihin Corp
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Honda Motor Co Ltd
Keihin Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

<P>PROBLEM TO BE SOLVED: To prevent local saturation by the trapped liquid of a filter element as much as possible, to extend the durable time of the filter element, to increase the trapping amount of liquid and to improve a liquid trapping performance in a liquid trap apparatus for a gas comprising a trap housing and a liquid filter provided with an upper end wall with an opening communicating with a gas entrance, a lower end wall and a cylindrical filter element connecting the upper end wall and the lower end wall and disposed inside the trap housing. <P>SOLUTION: Inside the filter element 20, an inflow guide pipe 7 which has a uniform path area, extends from the opening 17a to the lower end wall 18 and guides the gas flowing into the gas entrance 14 into the filter element 20 is disposed. The relation between the path area (a) of the inflow guide pipe 7 and the apparent effective filtration area A present below the inflow guide pipe 7 of the inner peripheral surface area of the filter element 20 is set to A/a=14 or below. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、気体入口及び気体出口を設けた天井壁を有するトラップハウジングと、内部が前記気体入口に連通する筒状のフィルタエレメントを備えて前記トラップハウジング内に配設される液体フィルタとからなり、この液体フィルタの外側で前記トラップハウジング内部に前記気体出口を開口させ、前記気体入口から前記気体出口に向かって流れる気体が前記フィルタエレメントを通過する際、該気体に含まれる液体を該フィルタエレメントにより捕捉するようにした、気体用液体トラップ装置の改良に関する。   The present invention comprises a trap housing having a ceiling wall provided with a gas inlet and a gas outlet, and a liquid filter provided inside the trap housing with a cylindrical filter element communicating with the gas inlet. The gas outlet is opened inside the trap housing outside the liquid filter, and when the gas flowing from the gas inlet toward the gas outlet passes through the filter element, the liquid contained in the gas is passed through the filter element. It is related with the improvement of the liquid trap apparatus for gas which was made to capture by this.

例えば天然ガスを燃料とするエンジンを備える自動車では、天然ガスを圧縮貯蔵した燃料タンクを搭載し、エンジンの作動時には、その燃料タンクから導出した高圧の気体燃料を所定圧力に減圧してエンジンに供給する。ところで、天然ガスを燃料タンクに圧縮貯蔵する際には、天然ガスの圧縮に使用するコンプレッサ内の潤滑オイルが、圧縮される燃料に多少とも混入することになるので、燃料タンク内の気体燃料をエンジンに燃料を供給する際には、その気体燃料から混入オイルを捕捉する必要がある。上記気体用液体トラップ装置は、このように気体から混入液体を捕捉するために使用するものであって、例えば下記特許文献１に開示されるように、既に知られている。   For example, an automobile equipped with an engine using natural gas as a fuel is equipped with a fuel tank that compresses and stores natural gas, and when the engine is operating, the high-pressure gaseous fuel derived from the fuel tank is reduced to a predetermined pressure and supplied to the engine. To do. By the way, when compressing and storing natural gas in the fuel tank, the lubricating oil in the compressor used for compressing the natural gas is mixed in the compressed fuel. When supplying fuel to the engine, it is necessary to capture mixed oil from the gaseous fuel. The gas liquid trap apparatus is used to capture the mixed liquid from the gas as described above, and is already known, for example, as disclosed in Patent Document 1 below.

特開平７−３２８３６４号公報JP 7-328364 A

従来、この種の気体用液体トラップ装置では、液体フィルタの上端壁に設けられる開口部がフィルタエレメント内の上部に開口しているので、その開口部と気体出口とが比較的近接することになり、このため開口部からフィルタエレメント内に流入した気体の多くはフィルタエレメントの上部を通過する傾向となることから、フィルタエレメントの上部が、気体から捕捉した液体で目詰まりする局部飽和の状態となって、フィルタエレメントの上部の液体捕捉性能が極端に低下する。またフィルタエレメントの、飽和状態となった部分から液体が滲み出すと、その液体はフィルタエレメントを通過した気体の流れに乗って気体出口に進み、再び気体に混入してしまい、液体捕捉性能を低下させることになる。   Conventionally, in this type of gas liquid trap apparatus, since the opening provided in the upper end wall of the liquid filter is opened at the upper part in the filter element, the opening and the gas outlet are relatively close to each other. For this reason, most of the gas flowing into the filter element through the opening tends to pass through the upper part of the filter element, so that the upper part of the filter element is in a locally saturated state in which it is clogged with liquid trapped from the gas. As a result, the liquid trapping performance at the top of the filter element is extremely lowered. Also, if liquid oozes from the saturated part of the filter element, the liquid rides on the flow of gas that has passed through the filter element and proceeds to the gas outlet, where it mixes with the gas again, reducing the liquid capture performance. I will let you.

本発明は、かゝる事情に鑑みてなされたもので、液体の捕捉性能が高い前記気体用液体トラップ装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object thereof is to provide the gas liquid trap apparatus having a high liquid trapping performance.

上記目的を達成するために、本発明は、上端部に気体入口及び気体出口を有するトラップハウジングと、前記気体入口に連通する開口部を有する上端壁、この上端壁の下方に配置された下端壁、並びにこれら上端壁及び下端壁間を連結するように上下に延びる筒状のフィルタエレメントを備えて前記トラップハウジング内に配置される液体フィルタとからなり、この液体フィルタの外側で前記トラップハウジング内部に前記気体出口を開口させ、前記気体入口から前記気体出口に向かって流れる気体が前記フィルタエレメントを通過する際、該気体に含まれる液体を該フィルタエレメントにより捕捉するようにした、気体用液体トラップ装置において、前記フィルタエレメント内に、一様の通路面積を有して前記開口部から前記下端壁に向かって延び前記気体入口に流入した気体をフィルタエレメント内に誘導する流入案内管を配設し、この流入案内管の通路面積ａと、前記フィルタエレメントの内周面面積のうちの、前記流入流入案内管の下方に存在する見掛け上の有効濾過面積Ａとの関係を、Ａ／ａ＝１４以下に設定したことを特徴とする。   To achieve the above object, the present invention provides a trap housing having a gas inlet and a gas outlet at the upper end, an upper end wall having an opening communicating with the gas inlet, and a lower end wall disposed below the upper end wall. And a liquid filter disposed in the trap housing with a cylindrical filter element extending vertically so as to connect the upper end wall and the lower end wall, and inside the trap housing outside the liquid filter. A gas liquid trap apparatus in which the gas outlet is opened, and when the gas flowing from the gas inlet toward the gas outlet passes through the filter element, the liquid contained in the gas is captured by the filter element. In the filter element, the filter element has a uniform passage area from the opening to the lower end wall. An inflow guide pipe is provided for guiding the gas flowing into the gas inlet into the filter element, and the inflow / inflow guide out of the passage area a of the inflow guide pipe and the inner peripheral surface area of the filter element. The relationship with the apparent effective filtration area A existing below the pipe is set to A / a = 14 or less.

本発明によれば、フィルタエレメントの捕捉液体による局部飽和を極力防ぎ、フィルタエレメントの耐用時間を延ばすと共に、液体の捕捉量を増加させることができ、液体捕捉性能の向上に寄与し得る。   ADVANTAGE OF THE INVENTION According to this invention, local saturation by the capture | acquisition liquid of a filter element can be prevented as much as possible, the lifetime of a filter element can be extended, the amount of liquid capture | acquisition can be increased, and it can contribute to the improvement of a liquid capture | acquisition performance.

本発明の実施例に係る気体用液体トラップ装置を一体に備えるプレッシャレギュレータの縦断面図1 is a longitudinal sectional view of a pressure regulator integrally including a gas liquid trap device according to an embodiment of the present invention. 図１の２−２線断面図2-2 sectional view of FIG. 図１の３−３線断面図3-3 sectional view of FIG. トラップ性能テスト試料となる４種類の気体用液体トラップ装置の断面図Cross-sectional views of four types of liquid trap devices for gases that serve as trap performance test samples 上記４種類の気体用液体トラップ装置の諸元及びトラップ性能テスト結果を示す表Table showing specifications and trap performance test results for the above four types of gas liquid trap devices 上記４種類の気体用液体トラップ装置のトラップ性能テスト結果を示すグラフThe graph which shows the trap performance test result of the above-mentioned four kinds of liquid trap devices for gas

本発明の実施の形態を、添付図面に示す本発明の好適な実施例に基づいて以下に説明する。   Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

図１は本発明の実施例に係る気体用液体トラップ装置を一体に備えるプレッシャレギュレータの縦断面図、図２は図１の２−２線断面図、図３は図１の３−３線断面図、図４はトラップ性能テスト試料となる４種類の気体用液体トラップ装置の断面図、図５は上記４種類の気体用液体トラップ装置の諸元及びトラップ性能テスト結果を示す表、図６は上記４種類の気体用液体トラップ装置のトラップ性能テスト結果を示すグラフである。   1 is a longitudinal sectional view of a pressure regulator integrally including a gas liquid trap device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a sectional view taken along line 3-3 in FIG. FIG. 4, FIG. 4 is a cross-sectional view of four types of gas liquid trap devices that serve as trap performance test samples, FIG. 5 is a table showing the specifications of the above four types of gas liquid trap devices and trap performance test results, and FIG. It is a graph which shows the trap performance test result of the said 4 types of liquid trap apparatus for gases.

先ず、図１において、燃料タンクＦには天然ガスが気体燃料として圧縮貯蔵される。この燃料タンクＦ内の高圧の気体燃料の使用に際しては、その気体燃料は、その圧力を所定値まで減圧すべくプレッシャレギュレータＲに高圧燃料通路１を通して送られる。   First, in FIG. 1, natural gas is compressed and stored in the fuel tank F as gaseous fuel. When the high-pressure gaseous fuel in the fuel tank F is used, the gaseous fuel is sent to the pressure regulator R through the high-pressure fuel passage 1 in order to reduce the pressure to a predetermined value.

プレッシャレギュレータＲは、一側に高圧ポート１ａ及び低圧ポート２ａを有する略角柱状のレギュレータ本体３を備えており、高圧ポート１ａには前記高圧燃料通路１の下流端が、また低圧ポート２ａにはエンジンＥの燃料噴射弁２４に連なる低圧燃料通路２の上流端がそれぞれ接続される。   The pressure regulator R includes a substantially prismatic regulator body 3 having a high pressure port 1a and a low pressure port 2a on one side. The high pressure port 1a has a downstream end of the high pressure fuel passage 1, and the low pressure port 2a has a low pressure port 2a. The upstream end of the low pressure fuel passage 2 connected to the fuel injection valve 24 of the engine E is connected to each other.

図１及び図２に示すように、レギュレータ本体３の中心部には、高圧ポート１ａに導入された気体燃料の圧力を所定値に減圧する調圧弁４が設けられ、この調圧弁４で減圧された気体燃料が調圧弁４の一側を通るように、調圧弁４の周方向に沿って円弧状に並んで上下方向に延びる複数の連絡通路１６，１６…がレギュレータ本体３に設けられる。   As shown in FIGS. 1 and 2, a pressure regulating valve 4 for reducing the pressure of the gaseous fuel introduced into the high pressure port 1a to a predetermined value is provided at the center of the regulator body 3, and the pressure is reduced by the pressure regulating valve 4. The regulator main body 3 is provided with a plurality of communication passages 16, 16 extending in the vertical direction along the circumferential direction of the pressure regulating valve 4 so that the gaseous fuel passes through one side of the pressure regulating valve 4.

レギュレータ本体３の下端面には気体用液体トラップ装置Ｔが取り付けられる。この気体用液体トラップ装置Ｔは、前記連絡通路１６，１６…より導入した気体燃料から混入オイルを捕捉、除去し、清浄な気体燃料をレギュレータ本体３の低圧ポート２ａへ送るもので、次にこの気体用液体トラップ装置Ｔについて図１〜図３を参照しながら詳細に説明する。   A gas liquid trap device T is attached to the lower end surface of the regulator body 3. This gas liquid trap device T captures and removes the mixed oil from the gaseous fuel introduced from the communication passages 16, 16... And sends clean gaseous fuel to the low pressure port 2 a of the regulator body 3. The gas liquid trap apparatus T will be described in detail with reference to FIGS.

気体用液体トラップ装置Ｔは、プレッシャレギュレータＲのレギュレータ本体３下面に取り付けられるトラップハウジング５と、このトラップハウジング５内に配設されるオイルフィルタ６とを主たる構成要素とする。   The gas liquid trap apparatus T includes a trap housing 5 attached to the lower surface of the regulator body 3 of the pressure regulator R and an oil filter 6 disposed in the trap housing 5 as main components.

トラップハウジング５は、上端に取り付けフランジ１０ａ及び天井壁１０ｂを有する円筒状のハウジング本体１０と、このハウジング本体１０の下端に取り外し可能に螺着されるカップ体１１と、前記取り付けフランジ１０ａの上面に重ねられる蓋板１２とで構成され、この蓋板１２及び取り付けフランジ１０ａは、プレッシャレギュレータＲのレギュレータ本体３下面にボルト１３により固着される。その際、トラップハウジング５はレギュレータ本体３と略同軸状に配置される。カップ体１１の下端面には、それの着脱のための六角ボルト頭部状の工具係合部１１ａが一体に形成される。   The trap housing 5 includes a cylindrical housing body 10 having an attachment flange 10a and a ceiling wall 10b at the upper end, a cup body 11 that is removably screwed to the lower end of the housing body 10, and an upper surface of the attachment flange 10a. The lid plate 12 and the mounting flange 10a are fixed to the lower surface of the regulator body 3 of the pressure regulator R with bolts 13. At that time, the trap housing 5 is arranged substantially coaxially with the regulator body 3. On the lower end surface of the cup body 11, a hexagonal bolt head-shaped tool engaging portion 11a for integrally attaching and detaching the cup body 11 is integrally formed.

オイルフィルタ６は、上端壁１７と、この上端壁１７の下方に配置される下端壁１８と、これら上端壁１７及び下端壁１８間を連結する円筒状のフィルタエレメント２０とからなっており、このフィルタエレメント２０は、気体燃料の通過を許容すると共に潤滑オイル等の液体を捕捉する機能を有する。上端壁１７の中心部には開口部１７ａが設けられる。   The oil filter 6 includes an upper end wall 17, a lower end wall 18 disposed below the upper end wall 17, and a cylindrical filter element 20 that connects the upper end wall 17 and the lower end wall 18. The filter element 20 has a function of permitting the passage of gaseous fuel and capturing a liquid such as lubricating oil. An opening 17 a is provided at the center of the upper end wall 17.

ハウジング本体１０の天井壁１０ｂの中心部には気体入口１４が設けられ、この気体入口１４を前記複数の連絡通路１６，１６…に連通すべく、蓋板１２に半径方向の入口通路２５が形成される。また気体入口１４には、前記開口部１７ａを貫通してフィルタエレメント２０内に突出する流入案内管７が一体に連設され、上端壁１７には、流入案内管７の外周面に密接するシール部材２２が装着される。こうして、流入案内管７は、前記開口部１７ａから下端壁１８に向かって延びるようにフィルタエレメント２０内に配置される。上記下端壁１８は、流入案内管７から噴出した気体を反射させ得る非通気性素材で構成される。   A gas inlet 14 is provided at the center of the ceiling wall 10b of the housing body 10, and a radial inlet passage 25 is formed in the cover plate 12 so that the gas inlet 14 communicates with the plurality of communication passages 16, 16,. Is done. The gas inlet 14 is integrally provided with an inflow guide tube 7 penetrating through the opening 17 a and protruding into the filter element 20, and the upper end wall 17 is in close contact with the outer peripheral surface of the inflow guide tube 7. The member 22 is attached. Thus, the inflow guide tube 7 is arranged in the filter element 20 so as to extend from the opening 17a toward the lower end wall 18. The lower end wall 18 is made of a non-breathable material that can reflect the gas ejected from the inflow guide tube 7.

一方、下端壁１８には、その下面から突出してカップ体１１の底部で支承される支柱１８ａが一体に形成される。したがってオイルフィルタ６全体がこの支柱１８ａを介してカップ体１１に支持されることになる。   On the other hand, the lower end wall 18 is integrally formed with a column 18 a that protrudes from the lower surface thereof and is supported at the bottom of the cup body 11. Accordingly, the entire oil filter 6 is supported by the cup body 11 through the support column 18a.

而して、流入案内管７の下端と前記下端壁１８との離間距離Ｃ１は、２０ｍｍ以下に設定される。   Thus, the distance C1 between the lower end of the inflow guide tube 7 and the lower end wall 18 is set to 20 mm or less.

また流入案内管７のフィルタエレメント２０内への突入長さＣ２は、３０ｍｍ以上に設定される。   Further, the intrusion length C2 of the inflow guide tube 7 into the filter element 20 is set to 30 mm or more.

さらに流入案内管７の通路面積ａと、フィルタエレメント２０の見掛け上の有効面積Ａとの比Ａ／ａは、１４以下に設定される。   Furthermore, the ratio A / a between the passage area a of the inflow guide tube 7 and the apparent effective area A of the filter element 20 is set to 14 or less.

こゝで、流入案内管７の通路面積ａは下記（１）式により求められる。   Here, the passage area a of the inflow guide tube 7 is obtained by the following equation (1).

ａ＝πｄ2 ／４・・・・・・・・・・（１）
但し、ｄ：流入案内管７の内径
またフィルタエレメント２０の見掛け上の有効面積Ａは下記（２）式により求められる。 a = πd 2/4 ·········· ( 1)
Where d: inner diameter of the inflow guide tube 7 and the apparent effective area A of the filter element 20 is obtained by the following equation (2).

Ａ＝πＤ・Ｃ１・・・・・・・・・・（２）
但し、Ｄ：フィルタエレメント２０の内径
Ｃ１：流入案内管７の下端と前記下端壁１８との離間距離
図１及び図３に示すように、ハウジング本体１０の天井壁１０ｂの一側部に切欠き１０ｃが設けられており、蓋板１２には、この切欠き１０ｃに対応する部分でオイルフィルタ６外側のハウジング本体１０内に開口する複数の気体出口１５，１５…が設けられる。これら複数の気体出口１５，１５…は、トラップハウジング５の周方向に沿って円弧状に配列されると共に、レギュレータ本体３の下面に形成される集合室２１を介して前記低圧ポート２ａに連通される。またこれら複数の気体出口１５には、ハウジング本体１０内に突出する複数の流出案内管２３，２３…が一体に連設される。したがって複数の流出案内管２３，２３…もトラップハウジング５の周方向に沿って円弧状に配列されることになる。その際、全ての流出案内管２３，２３…は、その下端が前記フィルタエレメント２０より上方位置を占めるように配置される。 A = πD · C1 (2)
Where D: inner diameter of the filter element 20
C1: Distance between the lower end of the inflow guide tube 7 and the lower end wall 18 As shown in FIGS. 1 and 3, a notch 10c is provided on one side of the ceiling wall 10b of the housing body 10, and the lid plate 12 is provided with a plurality of gas outlets 15, 15... That open into the housing body 10 outside the oil filter 6 at portions corresponding to the notches 10c. The plurality of gas outlets 15, 15... Are arranged in an arc shape along the circumferential direction of the trap housing 5 and communicated with the low-pressure port 2 a through a collecting chamber 21 formed on the lower surface of the regulator body 3. The Further, a plurality of outflow guide tubes 23, 23... Projecting into the housing body 10 are integrally connected to the plurality of gas outlets 15. Accordingly, the plurality of outflow guide tubes 23, 23... Are also arranged in an arc shape along the circumferential direction of the trap housing 5. At that time, all the outflow guide pipes 23, 23... Are arranged such that their lower ends occupy positions above the filter element 20.

またオイルフィルタ６の軸線は、トラップハウジング５の軸線に対して流出案内管２３，２３…と反対方向に僅かな距離ｅだけオフセットして配置され、さらに流出案内管２３，２３…に対向するハウジング本体１０の外側壁１０ｄが半径方向に膨出するように形成される。こうすることで、トラップハウジング５の大径化を抑えつゝ、オイルフィルタ６及び外側壁１０ｄ間の間隔を充分に確保して、その間に比較的大径の流出案内管２３，２３…をオイルフィルタ６及び外側壁１０ｄから離間させて配設することを可能にしている。   The axis of the oil filter 6 is offset from the axis of the trap housing 5 by a slight distance e in the opposite direction to the outflow guide pipes 23, 23. The outer wall 10d of the main body 10 is formed so as to bulge in the radial direction. In this way, while keeping the trap housing 5 from increasing in diameter, a sufficient space between the oil filter 6 and the outer wall 10d is secured, and the relatively large-diameter outflow guide tubes 23, 23. The filter 6 and the outer wall 10d can be disposed apart from each other.

次に、この実施例の作用について説明する。   Next, the operation of this embodiment will be described.

プレッシャレギュレータＲにより所定圧力まで減圧された気体燃料がオイルフィルタ６の蓋板１２の気体入口１４に到達すると、その気体燃料は、流入案内管７によりフィルタエレメント２０内の下部まで誘導され、そして拡散するため、その気体燃料は、フィルタエレメント２０の広い範囲で濾過され、気体燃料中に混在するオイルが捕捉されることになり、特に、前記Ｃ１、Ｃ２及びＡ／ａの設定により、フィルタエレメント２０の局部飽和を極力防ぎ、フィルタエレメント２０の耐用時間を延ばすことができる。   When the gaseous fuel depressurized to a predetermined pressure by the pressure regulator R reaches the gas inlet 14 of the cover plate 12 of the oil filter 6, the gaseous fuel is guided to the lower part in the filter element 20 by the inflow guide pipe 7 and diffused. Therefore, the gaseous fuel is filtered in a wide range of the filter element 20, and oil mixed in the gaseous fuel is captured. In particular, the filter element 20 is set according to the setting of C1, C2, and A / a. The local saturation of the filter element 20 can be prevented as much as possible, and the service life of the filter element 20 can be extended.

またオイルフィルタ６の下端壁１８は、流入案内管７から流出した気体を反射させ得る非通気性素材で構成されるので、気体燃料が流入案内管７から下方に吹き出したとき、その気体燃料を上記下端壁１８で上方に反射させることで、該気体燃料の拡散を促進し、フィルタエレメント２０での局部飽和の発生防止を一層効果的に防ぐことができる。   Since the lower end wall 18 of the oil filter 6 is made of a non-breathable material that can reflect the gas flowing out from the inflow guide tube 7, when the gaseous fuel blows out downward from the inflow guide tube 7, By reflecting upward at the lower end wall 18, diffusion of the gaseous fuel can be promoted, and the local saturation in the filter element 20 can be prevented more effectively.

上記効果は、次のようなトラップ性能テストにより確認することができた。   The above effect could be confirmed by the following trap performance test.

テストに際して、先ず図４及び図５に示すように、前記Ｃ１、Ｃ２及びＡ／ａを異にした（Ａ）〜（Ｄ）の４種類の気体用液体トラップ装置Ｔを試料として用意し、次の試験条件で各試料におけるフィルタエレメント２０の耐用時間及びオイル捕捉量を測定した。
・雰囲気温度：常温
・気体：ＣＮＧ（高圧天然ガス）
・気体導入圧力：０．２５ＭＰａ
・気体流量：４９０Ｌ／ｍｉｎ
・混入液体：潤滑オイル
・液体混入率：１５ｐｐｍ
・各試料の共通諸元：ｄ＝１２ｍｍ、Ｄ＝２６ｍｍ、ａ＝１１３ｍｍ2 、Ｌ＝５０ｍｍ
テストの結果、図４〜図６に示すように、試料（Ａ）では、Ｃ２＝０ｍｍであるため、フィルタエレメント２０内に流入した気体は直ちに気体出口１５に向かうことから、捕捉オイルによるフィルタエレメント２０の飽和部Ｓがフィルタエレメント２０の上端部に早期に集中し、これに伴ないフィルタエレメント２０の耐用時間が短く、したがってオイル捕捉量も少なかった。 In the test, first, as shown in FIG. 4 and FIG. 5, four types of gas liquid trap devices T (A) to (D) with different C1, C2 and A / a are prepared as samples, The service life of the filter element 20 and the oil trapping amount in each sample were measured under the test conditions of
・ Ambient temperature: normal temperature ・ Gas: CNG (high pressure natural gas)
-Gas introduction pressure: 0.25 MPa
・ Gas flow rate: 490 L / min
・ Liquid mixture: Lubricating oil ・ Liquid contamination rate: 15 ppm
-Common specifications of each sample: d = 12 mm, D = 26 mm, a = 113 mm 2 , L = 50 mm
As a result of the test, as shown in FIGS. 4 to 6, in the sample (A), since C2 = 0 mm, the gas flowing into the filter element 20 immediately goes to the gas outlet 15, so that the filter element by the trapped oil The 20 saturated portions S concentrated early on the upper end portion of the filter element 20, and accordingly, the service life of the filter element 20 was short, and therefore the amount of oil trapped was small.

Ｃ１＝２０ｍｍとした試料（Ｂ）では、フィルタエレメント２０の中間部に発生する飽和部Ｓの範囲が広がり始め、フィルタエレメント２０の耐用時間及びてオイル捕捉量の向上が開始された。   In the sample (B) in which C1 = 20 mm, the range of the saturated portion S generated in the middle portion of the filter element 20 began to widen, and the service life of the filter element 20 and the improvement of the oil trapping amount were started.

そしてＣ１＝１５ｍｍ、Ｃ２＝３５ｍｍ、Ａ／ａ＝１１の試料（Ｃ）では、フィルタエレメント２０全体が長時間をかけて徐々に飽和部Ｓとなっていくことなり、フィルタエレメント２０の耐用時間及びオイル捕捉量の大幅な向上が認められた。   In the sample (C) with C1 = 15 mm, C2 = 35 mm, and A / a = 11, the entire filter element 20 gradually becomes the saturated portion S over a long period of time. A significant improvement in the amount of oil captured was observed.

試料（Ｄ）のように、Ｃ１を更に狭めると、フィルタエレメント２０での飽和部Ｓの範囲が下部に移行し始め、フィルタエレメント２０の耐用時間及びオイル捕捉量が徐々に減少し始めたが、大きな落ち込みはなかった。   When C1 was further narrowed as in the sample (D), the range of the saturated portion S in the filter element 20 began to shift to the lower part, and the service life of the filter element 20 and the amount of oil trapped began to gradually decrease. There was no major decline.

但し、流入案内管７の通路面積ａに対してフィルタエレメント２０の見掛け上の有効面積Ａを小さくした場合、本テスト条件において、Ｃ１＜３ｍｍ、Ａ／ａ＜２．２となることは、気体の圧力損失が大きくなるため、避ける方がよい。   However, if the apparent effective area A of the filter element 20 is made smaller than the passage area a of the inflow guide pipe 7, C1 <3 mm and A / a <2.2 under the test conditions It is better to avoid this because the pressure loss increases.

上記のようにフィルタエレメント２０で濾過された気体燃料は、複数の流出案内管２３，２３…を分流しながら通過し、集合室２１で合流した後、低圧ポート２ａ及び低圧燃料通路２を経てエンジンＥの燃料噴射弁２４から噴射される。   The gaseous fuel filtered by the filter element 20 as described above passes through the plurality of outflow guide pipes 23, 23..., Merges in the collecting chamber 21, and then passes through the low pressure port 2 a and the low pressure fuel passage 2 to the engine. E is injected from the fuel injection valve 24.

ところで、フィルタエレメント２０で捕捉されたオイルがフィルタエレメント２０の外周面から滲み出し、フィルタエレメント２０を通過する気体燃料に乗ってフィルタエレメント２０から離脱することがあるが、気体出口１５に連設されてトラップハウジング５内に突出した流出案内管２３，２３…の周囲には気流の淀み部が形成されるので、フィルタエレメント２０を通過した気体燃料は一旦半径方向外方に向うとき、その気体燃料に乗ったオイルは、気体燃料との比重差によりトラップハウジング５の内周面に強く当たって付着し、気体燃料から分離することになる。その後、気体燃料は、流れを上方に転じて前記淀み部を避けながら流出案内管２３，２３…に直接向かうので、トラップハウジング５の内周面に付着したオイルをトラップハウジング５の天井面まで押し上げることはなく、したがってそのオイルが流出案内管２３，２３…に流れ込むことはない。   By the way, the oil trapped by the filter element 20 oozes out from the outer peripheral surface of the filter element 20 and rides on the gaseous fuel passing through the filter element 20 and may be detached from the filter element 20. .. Is formed around the outflow guide pipes 23, 23... Projecting into the trap housing 5, so that the gaseous fuel that has passed through the filter element 20 once travels radially outward. The oil that has ridden on the inner surface of the trap housing 5 strongly adheres to and adheres to the inner surface of the trap housing 5 due to the difference in specific gravity with the gaseous fuel. After that, the gaseous fuel turns upward and avoids the stagnation part, and goes directly to the outflow guide pipes 23, 23... Therefore, the oil does not flow into the outflow guide tubes 23, 23.

かくして、フィルタエレメント２０からの滲み出しオイルの気体燃料への再混入を防ぎ、オイル捕捉性能の向上に寄与することができる。   Thus, exudation oil from the filter element 20 can be prevented from being mixed again into the gaseous fuel, which can contribute to improvement in oil trapping performance.

しかも流出案内管２３，２３…は、その下端がフィルタエレメント２０の上方位置を占めるように配置されることで、流出案内管２３，２３…をオイルフィルタ６から上下方向に遠ざけることになり、トラップハウジング５の大径化を防ぎながら、フィルタエレメント２０からの滲み出し液体の流出案内管２３，２３…への直接侵入を極力防ぐことができる。   In addition, the outflow guide tubes 23, 23... Are arranged so that their lower ends occupy the upper position of the filter element 20, so that the outflow guide tubes 23, 23. While preventing the diameter of the housing 5 from increasing, it is possible to prevent as much as possible the intrusion liquid from the filter element 20 from directly entering the outflow guide tubes 23, 23.

さらに流出案内管２３，２３…はトラップハウジング５の周方向に複数配設されることで、各流出案内管２３の小径を図りつゝ気体出口１５側の圧力損失を少なくすることができ、これによりオイルフィルタ６及びトラップハウジング５間の半径方向間隙の縮小、延いてはトラップハウジング５のコンパクト化を図ることができる。   Further, a plurality of outflow guide pipes 23, 23... Are arranged in the circumferential direction of the trap housing 5, thereby reducing the pressure loss on the gas outlet 15 side by reducing the diameter of each outflow guide pipe 23. Thus, the radial gap between the oil filter 6 and the trap housing 5 can be reduced, and the trap housing 5 can be made compact.

フィルタエレメント２０により捕捉されたオイルや、トラップハウジング５の内周面に付着したオイルは、次第に滴となって落下し、オイルはカップ体１１の底部に溜まる。そこで、カップ体１１をハウジング本体１０から離脱すれば、それを清掃することができる。また汚れたオイルフィルタ６を清掃したり新規のものと交換することもできる。   The oil captured by the filter element 20 and the oil adhering to the inner peripheral surface of the trap housing 5 gradually drop as drops, and the oil accumulates at the bottom of the cup body 11. Therefore, if the cup body 11 is detached from the housing body 10, it can be cleaned. Also, the dirty oil filter 6 can be cleaned or replaced with a new one.

以上、本発明の実施例について説明したが、本発明はそれに限定されることなく、その要旨を逸脱しない範囲で種々の設計変更が可能である。   As mentioned above, although the Example of this invention was described, this invention is not limited to it, A various design change is possible in the range which does not deviate from the summary.

Ｔ・・・・・気体用液体トラップ装置
５・・・・・トラップハウジング
６・・・・・液体フィルタ（オイルフィルタ）
７・・・・・流入案内管
１４・・・・気体入口
１５・・・・気体出口
１７・・・・上端壁
１７ａ・・・開口部
１８・・・・下端壁
２０・・・・フィルタエレメント T ... Gas liquid trap device 5 ... Trap housing 6 ... Liquid filter (oil filter)
7... Inlet guide tube 14... Gas inlet 15... Gas outlet 17... Upper end wall 17 a.

Claims (1)

上端部に気体入口（１４）及び気体出口（１５）を有するトラップハウジング（５）と、前記気体入口（１４）に連通する開口部（１７ａ）を有する上端壁（１７）、この上端壁（１７）の下方に配置された下端壁（１８）、並びにこれら上端壁（１７）及び下端壁（１８）間を連結するように上下に延びる筒状のフィルタエレメント（２０）を備えて前記トラップハウジング（５）内に配置される液体フィルタ（６）とからなり、この液体フィルタ（６）の外側で前記トラップハウジング（５）内部に前記気体出口（１５）を開口させ、前記気体入口（１４）から前記気体出口（１５）に向かって流れる気体が前記フィルタエレメント（２０）を通過する際、該気体に含まれる液体を該フィルタエレメント（２０）により捕捉するようにした、気体用液体トラップ装置において、
前記フィルタエレメント（２０）内に、一様の通路面積を有して前記開口部（１７ａ）から前記下端壁（１８）に向かって延び前記気体入口（１４）に流入した気体をフィルタエレメント（２０）内に誘導する流入案内管（７）を配設し、この流入案内管（７）の通路面積ａと、前記フィルタエレメント（２０）の内周面面積のうちの、前記流入案内管（７）の下方に存在する見掛け上の有効濾過面積Ａとの関係を、Ａ／ａ＝１４以下に設定したことを特徴とする、気体用液体トラップ装置。 A trap housing (5) having a gas inlet (14) and a gas outlet (15) at the upper end, an upper end wall (17) having an opening (17a) communicating with the gas inlet (14), and the upper end wall (17 ) And a cylindrical filter element (20) extending vertically so as to connect the upper end wall (17) and the lower end wall (18), and the trap housing ( 5) a liquid filter (6) disposed in the inside of the trap housing (5) outside the liquid filter (6), and the gas outlet (15) is opened from the gas inlet (14). When the gas flowing toward the gas outlet (15) passes through the filter element (20), the liquid contained in the gas is captured by the filter element (20). In gas liquid trap device,
In the filter element (20), gas having a uniform passage area and extending from the opening (17a) toward the lower end wall (18) and flowing into the gas inlet (14) is passed through the filter element (20). An inflow guide tube (7) for guiding the inflow guide tube (7) is disposed, and the inflow guide tube (7) out of the passage area a of the inflow guide tube (7) and the inner peripheral surface area of the filter element (20). ), The relationship with the apparent effective filtration area A existing below is set to A / a = 14 or less.
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