JP4352181B2 - Piston pump movable seal liquid leakage prevention device - Google Patents

Piston pump movable seal liquid leakage prevention device Download PDF

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JP4352181B2
JP4352181B2 JP2006357004A JP2006357004A JP4352181B2 JP 4352181 B2 JP4352181 B2 JP 4352181B2 JP 2006357004 A JP2006357004 A JP 2006357004A JP 2006357004 A JP2006357004 A JP 2006357004A JP 4352181 B2 JP4352181 B2 JP 4352181B2
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piston
cylinder
ring
slope
piston pump
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JP2008138653A5 (en
JP2008138653A (en
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作男 田中
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作男 田中
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Priority to PCT/JP2007/073528 priority patent/WO2008069254A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes

Description

本発明は、例えば超高圧ピストンポンプ等の往復運動するピストンとシリンダーのシール部からの液漏れを防止する液漏れ防止装置に関する。  The present invention relates to a liquid leakage prevention device that prevents liquid leakage from a reciprocating piston and cylinder seal, such as an ultrahigh pressure piston pump.

従来のピストンポンプの可動シール部液漏れ防止装置としては、主に弾性のあるゴムやプラスチックや金属リングなどが使われてきた。（例えば、特許文献１参照）
特開平１１−５１１９３ Conventionally, as a device for preventing liquid leakage of a movable seal portion of a piston pump, elastic rubber, plastic, a metal ring or the like has been mainly used. (For example, see Patent Document 1)
JP 11-51193 A

上記のような従来のピストンポンプの可動シール部液漏れ防止装置では、近年、３，０００ｋｇｆ／ｃｍ２以上の液体超高圧を要求される様になり、弾性のあるゴムやプラスチック等を用いた場合、圧力が高くなればなるほど弾性があるので強く締めつけるため、摩擦抵抗が大きくなり、まして３，０００ｋｇｆ／ｃｍ２以上の超高圧では限界にきてをり、弾性の少ない金属リングがあったが、超高圧液体が漏れない位に締めつけると激しい動きで、焼付き（かじり）という問題点があった。In the case of the conventional piston pump movable seal part liquid leakage prevention device as described above, in recent years, liquid super-high pressure of 3,000 kgf / cm 2 or more has been required, and when elastic rubber or plastic is used. The higher the pressure is, the more elastic it is, so it tightens strongly, so the frictional resistance increases, and even at an ultra-high pressure of 3,000 kgf / cm 2 or more, there is a metal ring with little elasticity, When tightened to the point where the ultra-high pressure liquid does not leak, there was a problem of seizure (galling) due to intense movement.

この発明は、上述のような問題点を解決するためになされたもので、超高圧でも液漏れすることのないピストンポンプの可動シール部液漏れ防止装置を得ることを目的とする。  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a liquid leakage prevention device for a movable seal portion of a piston pump that does not leak even at an ultrahigh pressure.

この発明のピストンポンプの可動シール部液漏れ防止装置は、シリンダーとこのシリンダー内を往復運動するピストンと、上記シリンダーと上記ピストンとの間の液漏れを防止するリングと、このリングを押さえる押さえネジを備えたピストンポンプの可動シール部液漏れ防止装置において、上記リングは、複数のピストン側リングと、複数のシリンダー側リングの２種類を交互に組み込んだものである。  According to the present invention, there is provided a liquid leakage prevention device for a movable seal portion of a piston pump, a piston that reciprocates in the cylinder, a ring that prevents liquid leakage between the cylinder and the piston, and a holding screw that holds the ring. In the device for preventing liquid leakage of the movable seal portion of the piston pump provided with the above-described ring, the ring is one in which two types of piston side rings and a plurality of cylinder side rings are alternately incorporated.

また、上記ピストン側リングは、外径側の厚みは薄く、内径側の厚みは厚くした両側面が円錐台形状外斜面の断面台形のリングであり、上記シリンダー側リングは、外径側の厚みは厚く、内径側の厚みは薄くした両則面が円錐台形状内斜面の断面台形のリングである。また、リングは弾性が少なく滑りのよい物であれば金属に限らない。  The piston side ring is a trapezoidal ring with a frustoconical outer slope on both sides with a thin outer diameter and a thick inner diameter, and the cylinder side ring has a thickness on the outer diameter side. Is a trapezoidal ring with a frustoconical inner slope with both rule surfaces having a large inner diameter and a smaller inner diameter. Further, the ring is not limited to metal as long as it has low elasticity and is slippery.

ピストンポンプが往復運動しているシール部で、圧力の高い液体が加圧室から作用室と円錐台形状作用内斜面に流れ込み、応力がリング押さえネジの円錐台形状内斜面に掛かる。リングに斜面（角度）があるためピストン側リングはピストン側にシリンダー側リングはシリンダー側に圧力に比例した応力でリングが締まる。以上の構成のため非常に高い超高圧液体でシリンダーが膨らみ、内径が僅かな変径があつても、むりなく液体圧力と斜面で二種類のリングが、液体圧力に比例してピストン側リングは締まりピストン側に押しつけられ、シリンダー側リングは広がりシリンダー側に押しつけられるため、３，０００ｋｇｆ／ｃｍ２以上の超高圧でも、無理な締めつけもなく液体圧力に比例してリングがしまるため、激しい動きでも焼付き（かじり）もなく液漏れ防止てきる。In the seal part where the piston pump is reciprocatingly moved, a high-pressure liquid flows from the pressurizing chamber to the working chamber and the frustoconical action inner slope, and stress is applied to the frustoconical inner slope of the ring holding screw. Since the ring has an inclined surface (angle), the ring on the piston side is tightened by a stress proportional to the pressure on the piston side on the piston side and the cylinder side ring on the cylinder side. Because of the above configuration, even if the cylinder swells with very high ultra-high pressure liquid and the inner diameter is slightly changed, two types of rings are forcedly applied with liquid pressure and slope, and the piston side ring is tightened in proportion to the liquid pressure. Since it is pressed against the piston side and the cylinder side ring is spread and pressed against the cylinder side, even if it is an ultra-high pressure of 3,000 kgf / cm 2 or more, the ring will be proportional to the liquid pressure without excessive tightening, so even if it moves violently Prevents liquid leakage without seizing.

実施の形態１．
図１は、この発明の一実施の形態を示すピストンポンプの可動シール部液漏れ防止装置の一部を切り欠いた断面図である。図２は、シール部の拡大断面図である。図３は、ピストン側リングの一部を切り欠いた拡大斜視図である。図４は、シリンダー側リングの一部を切り欠いた拡大斜視図である。図において、１はシリンダーであり、円形の孔１ａとリング挿入孔１ｂの雌ネジ１ｃが設けられている。２はシリンダー１の孔１ａ内を往復運動する円柱状のピストンである。３はピストン側リングであり、燐青銅又は砲金などで外径側の厚みは狭く、内径側は広くしな両側面が円錐台形状外斜面で、断面が台形に形成されている。４はシリンダー側リングであり、ステンレス材料などで、両側面が円錐台形状内斜面で、断面が台形に形成されている。Embodiment 1 FIG.
FIG. 1 is a cross-sectional view in which a part of a movable seal portion liquid leakage prevention device for a piston pump showing an embodiment of the present invention is cut away. FIG. 2 is an enlarged cross-sectional view of the seal portion. FIG. 3 is an enlarged perspective view in which a part of the piston side ring is cut away. FIG. 4 is an enlarged perspective view in which a part of the cylinder side ring is cut away. In the figure, reference numeral 1 denotes a cylinder, which is provided with a circular hole 1a and a female screw 1c for a ring insertion hole 1b. A cylindrical piston 2 reciprocates in the hole 1a of the cylinder 1. Reference numeral 3 denotes a piston-side ring, which is made of phosphor bronze, gun metal, or the like. The outer diameter side is narrow, the inner diameter side is wide, both side surfaces are frustoconical outer slopes, and the cross section is trapezoidal. Reference numeral 4 denotes a cylinder-side ring, which is made of a stainless material or the like, and both side surfaces are frustoconical inner slopes and the cross section is trapezoidal.

８はシリンダー１の雌ネジ１ｃに軽くねじ込むためのリング押さえネジであり、雄ネジ部８ａとリング押さえ部８ｂと、ピストン側リング３に押圧する斜面８ｃを有し、斜面８ｃは円錐台形状内斜面に形成されている。９はシリンダー１とリング押さえネジ８との間に形成される余裕スペース、５はシリンダー１とピストン２との間に形成される加圧室である。６はシリンダー１とピストン２の間から超高圧の液体が浸入する作用室、７は作用内斜面である。また、リング押さえネジ８は、フランジ継ぎ手のような形状で、内径はピストン２が挿入できるように形成されており、リング押さえ部８ｂの外径はシリンダー側リング４の外径と同じ外径で、８ｄはフランジ外周である。  Reference numeral 8 denotes a ring holding screw for lightly screwing into the female screw 1c of the cylinder 1, and has a male screw portion 8a, a ring holding portion 8b, and an inclined surface 8c that presses against the piston side ring 3, and the inclined surface 8c is in a truncated cone shape. It is formed on the slope. Reference numeral 9 denotes an extra space formed between the cylinder 1 and the ring holding screw 8, and reference numeral 5 denotes a pressurizing chamber formed between the cylinder 1 and the piston 2. Reference numeral 6 denotes a working chamber into which ultrahigh pressure liquid enters from between the cylinder 1 and the piston 2, and 7 denotes a working inner slope. The ring holding screw 8 is shaped like a flange joint, and the inner diameter is formed so that the piston 2 can be inserted. The outer diameter of the ring holding portion 8b is the same as the outer diameter of the cylinder side ring 4. , 8d is the outer periphery of the flange.

次に、上述のように構成されたピストンポンプの可動シール部液漏れ防止装置の組立て方法を図１に基づき説明する。
先ず、シリンダー１の挿入孔１ｂの作用内斜面７に、ピストン側リング３の外斜面を合わせるように入れ込む。次にシリンダー側リング４を２個、ピストン側リング３を３個を組み込み、リング押さえネジ８をネジ入れて、挿入したピストン２に余り抵抗が掛からない程度にネジこむ。Next, a method for assembling the liquid seal prevention device for the movable seal portion of the piston pump configured as described above will be described with reference to FIG.
First, it inserts so that the outer slope of the piston side ring 3 may match the action inner slope 7 of the insertion hole 1b of the cylinder 1. Next, two cylinder-side rings 4 and three piston-side rings 3 are assembled, and a ring holding screw 8 is screwed in so that the inserted piston 2 is not subjected to excessive resistance.

発明の働きを説明すると、ピストンポンプが往復運動しているシール部で、圧力の高い液体が加圧室５から作用室６へ浸入して、円錐台形状作用内斜面７に流れ込んで応力がリング押さえネジ８の円錐台形状内斜面８ｃに掛かり、リングに斜面（角度）があるためピストン側リング３はピストン２側に、シリンダー側リング４はシリンダー１側に、圧力に比例した応力でリングが締まり、このような構成のため非常に高い超高圧液体でシリンダーが膨らみ、内径が僅かな変径があっても、液体圧力と斜面で２種類のリングが、液体圧力に比例してピストン側リング３は締まりピストン２側に押し付けられ、シリンダー側リング４は広がりシリンダー１側に押しつけられ、過度な締付けもなく圧力に連動して程好く２種類のリングが働き摩擦抵抗が少ないため焼付き（かじり）がない漏れ防止装置が得られる。To explain the function of the invention, a sealing portion of the piston pump is reciprocated, infiltrates the high pressure liquid to the working chamber 6 from the pressurizing chamber 5, stress ring flows into the frustoconical working in slope 7 Because the ring has an inclined surface (angle) on the truncated cone-shaped inner inclined surface 8c of the holding screw 8, the piston side ring 3 is on the piston 2 side and the cylinder side ring 4 is on the cylinder 1 side with a stress proportional to the pressure. Because of this configuration, even if the cylinder swells with a very high ultra-high pressure liquid and the inner diameter is slightly changed, two types of rings can be used for the piston pressure ring in proportion to the liquid pressure. 3 is pressed against the tight piston 2 side, the cylinder-side ring 4 is pressed against the spreading cylinder 1 side, work is liking the two rings as in conjunction with excessive pressures without tighten friction resistance It is seizure (scuffing) leaks prevention device can be obtained for less.

実施の形態２．
図５は、この発明の実施の形態２を示す異径のピストンポンプの縦断面図である。特開２００４−２１８６１９超高圧異径ピストンポンプに、この発明の可動シール部漏れ防止装置の組み込みを説明するため引用したもので、図において、ピストン側リング３およびシリンダー側リング４は実施の形態１と同様のものである。１１ａは異径のシリンダー前部、１１ｂは異径のシリンダー後部であり、異径のシリンダー後部１１ｂの内径は異径のシリンダー前部１１ａの内径より大きい。１２ａは異径のピストン前部、１２ｂは異径のピストン後部である。ピストン側リング３およびシリンダー側リング４を、内径の大きな異径のシリンダー後部１１ｂと内径の小さな異径のシリンダー前部に１１ａにピストン側リング３およびシリンダー側リング４を組み込む。Embodiment 2. FIG.
FIG. 5 is a longitudinal sectional view of a piston pump of different diameters showing Embodiment 2 of the present invention. Reference is made to Japanese Unexamined Patent Application Publication No. 2004-218619 super high pressure different diameter piston pump for explaining the incorporation of the movable seal portion leakage preventing device of the present invention. In the figure, the piston side ring 3 and the cylinder side ring 4 are shown in the first embodiment. Is the same. 11a is a different diameter cylinder front portion, and 11b is a different diameter cylinder rear portion. The inner diameter of the different diameter cylinder rear portion 11b is larger than the inner diameter of the different diameter cylinder front portion 11a. 12a is a piston front part with a different diameter, and 12b is a piston rear part with a different diameter. The piston side ring 3 and the cylinder side ring 4 are assembled into the piston side ring 3 and the cylinder side ring 4 in 11a at the cylinder rear portion 11b having a large inner diameter and a cylinder front portion having a small inner diameter.

この発明を組み込む異径のピストンポンプは、ピストンの先端で加圧しない、異径のピストン後部、１２ｂより異径のピストン前部１２ａは小さく円柱で、その小さな断面積を異径のピストン後部１２ｂの断面積から差し引いた面積をテーパーにしており、そのテーパー部で加圧するため抗力が分散される。加圧面積に対して異径のピストン後部１２ｂの断面積が大きいので、大きな力で押すことが出来るため、液体を超高圧で押し出すことが出来る。  The piston pump of different diameter incorporating the present invention is not pressurized at the tip of the piston, the piston rear portion of the different diameter, the piston front portion 12a having a different diameter from 12b is a small cylinder, and its small cross-sectional area is the piston rear portion 12b having a different diameter. The area subtracted from the cross-sectional area is tapered, and since the pressure is applied at the tapered portion, the drag is dispersed. Since the cross-sectional area of the piston rear part 12b having a different diameter with respect to the pressurized area is large, the piston can be pushed with a large force, so that the liquid can be pushed out at an ultrahigh pressure.

ピストンが往復運動出来ることは、ピストンとシリンダーの間に僅かでも隙間があることになる。また、圧縮熱などでピストンよりシリンダー側ほうが、円周の熱膨張率が大きく、超高圧でシリンダーが僅かでも膨らみなどが考えられるため、液体を超高圧で効率をより良く押し出すために、この発明の可動シール部漏れ防止装置を、異径のピストンポンプに組み込むと、シリンダーに僅かな膨らみ変径があってもリングに斜面（角度）があるため加圧室の圧力に比例して無理なくリングが締まるため、異径のピストンポンプの効率が良くなる。  The fact that the piston can reciprocate means that there is even a slight gap between the piston and the cylinder. In addition, since the thermal expansion coefficient of the circumference of the cylinder is larger than the piston due to compression heat, etc., and the cylinder may swell even slightly even at ultra-high pressure, this invention is used to push out the liquid better at ultra-high pressure. If the movable seal part leakage prevention device is incorporated into a piston pump with a different diameter, the ring has a slope (angle) even if the cylinder has a slight bulge and diameter change. As a result, the efficiency of the piston pump with a different diameter is improved.

この発明を異径のピストンポンプに組み込んで、ディーゼル機関の燃料噴射に使うと、これまで以上の超高圧燃料噴射が可能で、燃料が高騰しているこの頃、燃料効率もよく排ガスもクリーンになる。また、従来の同じ押し出し量の超高油圧ポンプと比較して、シンプルで油圧機器もコンパクトになり、超高水圧ポンプとして使っても、現場に於て、船底喫水線下の海草、かき、錆、ペンキなどを超高水圧で剥離洗浄作業も手軽で容易になる。  When this invention is incorporated into a piston pump of a different diameter and used for fuel injection in a diesel engine, ultra-high pressure fuel injection can be performed more than ever, and at this time fuel is soaring, fuel efficiency is good and exhaust gas is clean. . In addition, compared to conventional ultra-high hydraulic pumps with the same amount of extrusion, the hydraulic equipment is simple and compact, and even when used as an ultra-high hydraulic pump, seaweed, oysters, rust, It is easy and easy to remove and clean paint with ultra-high water pressure.

この発明の一実施の形態を示すピストンポンプの可動シール部液漏れ防止装置の一部を切り欠いた断面図出ある。  It is sectional drawing which notched a part of movable seal part liquid leak prevention apparatus of the piston pump which shows one Embodiment of this invention. この発明の可動シール部の拡大断面図出ある。  It is an expanded sectional view of the movable seal part of this invention. この発明のピストン側リングの一部を切り欠いた拡大斜視図出ある。  It is the expansion perspective view which notched a part of piston side ring of this invention. この発明のシリンダー側リングの一部を切り欠いた拡大斜視図出ある。  It is the expansion perspective view which notched a part of cylinder side ring of this invention. この発明の実施の形態２を示す異径のピストンポンプの縦断面図である。  It is a longitudinal cross-sectional view of the piston pump of different diameter which shows Embodiment 2 of this invention.

符号の説明Explanation of symbols

１ シリンダー １ａ ピストン挿入孔
１ｂ リング挿入孔 １ｃ 雌ネジ
２ ピストン ３ ピストン側リング
３ａ ピストン側リング外斜面 ４ シリンダー側リング
４ａ シリンダー側リング内斜面 ５ 加圧室
６ 作用室 ７ 作用内斜面
８ リング押さえネジ ８ａ 雄ネジ
８ｂ リング押さえ部 ８ｃ リング押さえ内斜面
８ｄ フランジ外周 ９ 余裕スペース
１１ 異径のシリンダー １１ａ 異径のシリンダー前部
１１ｂ 異径のシリンダー後部 １２ａ 異径のピストン前部
１２ｂ 異径のピストン後部DESCRIPTION OF SYMBOLS 1 Cylinder 1a Piston insertion hole 1b Ring insertion hole 1c Female thread 2 Piston 3 Piston side ring 3a Piston side ring outer slope 4 Cylinder side ring 4a Cylinder side ring slope 5 Pressurizing chamber 6 Working chamber 7 Working slope 8 Ring holding screw 8a Male thread 8b Ring retainer 8c Slope inside ring retainer 8d Flange outer periphery 9 Spare space 11 Different diameter cylinder 11a Different diameter cylinder front 11b Different diameter cylinder rear 12a Different diameter piston front 12b Different diameter piston rear

Claims (1)

シリンダーと、このシリンダー内を往復運動するピストンと、上記シリンダーと上記ピストンとの間の液漏れを防止するリングと、このリングを押さえる押さえネジを備えた、ピストンポンプの可動シール部液漏れ防止装置において、上記リングは両側面とも斜面であるピストン側リングとシリンダー側リングであって、複数の該側面が円錐台形状外斜面であるピストン側リングと複数の該側面が円錐台形状内斜面であるシリンダー側リングを交互に組み込んだシール部を構成し、シリンダーとピストンの外周部との間に加圧室を形成し、該加圧室側のシール部と接する前記シリンダーに作用内斜面及び作用室を形成し、前記加圧室からの高圧液体を前記作用室を介して前記作用斜面に流れ込ませ、流れ込んだ高圧液体によりピストン側リングが応力をうけて、加圧室の液体圧力に連動して過度な締め付けられることなく前記リングが締まることを特徴とするピストンポンプの可動シール部液漏れ防止装置。Piston pump movable seal part liquid leakage prevention device comprising a cylinder, a piston that reciprocates in the cylinder, a ring that prevents liquid leakage between the cylinder and the piston, and a holding screw that holds the ring. in, the ring is a piston-side ring and cylinder-side ring which is slant both sides, the piston-side ring and a plurality of said side faces a plurality of said sides is a frustoconical outer slope is frustoconical in slope A seal part in which cylinder side rings are alternately assembled is formed, a pressurizing chamber is formed between the cylinder and the outer peripheral part of the piston, and an inner working slope and a working chamber are in contact with the seal part on the pressurizing chamber side is formed and a high pressure liquid from the pressure chamber causes flow into the working slope through the working chamber, the piston-side phosphorus by high pressure liquid having flown There undergoing stress, pressure chamber movable sealing unit leakage preventing device of a piston pump, wherein the ring tightens without being tightened excessive in conjunction with the fluid pressure.
JP2006357004A 2006-11-30 2006-11-30 Piston pump movable seal liquid leakage prevention device Expired - Fee Related JP4352181B2 (en)

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PCT/JP2007/073528 WO2008069254A1 (en) 2006-11-30 2007-11-28 Moving-seal portion liquid-leakage preventing device for piston pump

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US9314064B2 (en) 2013-12-04 2016-04-19 Schawbel Technologies Llc Heated insole with removable heating assembly
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