JP2011017376A - Seal structure for fluid machine - Google Patents

Seal structure for fluid machine Download PDF

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JP2011017376A
JP2011017376A JP2009161940A JP2009161940A JP2011017376A JP 2011017376 A JP2011017376 A JP 2011017376A JP 2009161940 A JP2009161940 A JP 2009161940A JP 2009161940 A JP2009161940 A JP 2009161940A JP 2011017376 A JP2011017376 A JP 2011017376A
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packing
fluid machine
adapter
annular
seal structure
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Tetsuya Ochiai
徹也 落合
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Maruyama Manufacturing Co Ltd
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Maruyama Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a seal structure for a fluid machine reducing cost and extending a life.SOLUTION: An annular male adapter 21 disposed at one side of an annular packing 20 for gripping the packing 20 from both sides includes a V-shape cross section projection part 21a, and is manufactured from flat plate by pressing. Consequently, cost is reduced by inhibiting increase of manufacturing cost. The packing 20 is pressed by an elastic function of the V-shape cross section projection part 21a. Consequently, looseness is eliminated by applying load in the packing 20 and a life is extended.

Description

本発明は、流体機械のシール構造に関する。   The present invention relates to a seal structure for a fluid machine.

往復動部材が、マニホルド内に形成されたシリンダ部内を往復動することにより、当該シリンダ部内の先端側に形成されたポンプ室で流体のポンプ作用を行う往復動ポンプが知られている。このような往復動ポンプでは、シリンダ部と往復動部材との間に高圧シールを設け、当該高圧シールにより、ポンプ室の高圧流体がシリンダ部と往復動部材との間を伝って駆動部側へ漏出することを防止している。このような高圧シールとしては、円環状を成す複数のＶパッキンを往復動部材の往復動方向に積層し、この積層されたＶパッキンを両側から挟み込むべく、Ｖパッキンの両側に、円環状のアダプタを配設したものが広く採用されている。   2. Description of the Related Art A reciprocating pump is known in which a reciprocating member reciprocates in a cylinder portion formed in a manifold so that a fluid pumping action is performed in a pump chamber formed on the tip side in the cylinder portion. In such a reciprocating pump, a high-pressure seal is provided between the cylinder part and the reciprocating member, and the high-pressure seal causes the high-pressure fluid in the pump chamber to travel between the cylinder part and the reciprocating member to the drive part side. Prevents leakage. As such a high-pressure seal, a plurality of annular V packings are stacked in the reciprocating direction of the reciprocating member, and an annular adapter is provided on both sides of the V packing so that the stacked V packings are sandwiched from both sides. Widely used are those provided with the.

しかしながら、このようなＶパッキンを用いたシール構造にあっては、長期間の使用に連れてＶパッキンが摩耗し遊びが生じて長寿命化が図れないという問題がある。そこで、以下の特許文献１〜３には、Ｖパッキンに弾性力等の荷重を与えることにより遊びを無くし、長寿命化を図る技術が開示されている。   However, such a seal structure using the V-packing has a problem that the V-packing wears and plays with long-term use, so that the life cannot be extended. In view of this, Patent Documents 1 to 3 below disclose techniques for extending the life by eliminating play by applying a load such as elastic force to the V packing.

特許文献１の技術は、圧縮コイルバネによりオスアダプタを介してＶパッキンに荷重を与えるものである。また、特許文献２、３の技術は、圧縮コイルバネ及び従来のアダプタに代えて、弾性機能を有する新規なアダプタを用いるものであり、特許文献２では、可撓性材料から成り中空部を有するアダプタを用い、特許文献３では、アダプタとして合成ゴム等の弾性リングを用いている。   The technique of patent document 1 gives a load to V packing through a male adapter with a compression coil spring. The techniques of Patent Documents 2 and 3 use a novel adapter having an elastic function instead of a compression coil spring and a conventional adapter. In Patent Document 2, an adapter made of a flexible material and having a hollow portion is used. In Patent Document 3, an elastic ring such as a synthetic rubber is used as an adapter.

特開昭６３−２５９１７５号公報JP 63-259175 A 実公平１−３５９７８号公報No. 1-35978 実公平２−２９３２０号公報No. 2-29320

しかしながら、特許文献１にあっては、別途圧縮コイルバネが必要のため、部品点数が増加し高コスト化する。また、特許文献２にあっては、弾性機能を発揮すべくアダプタが可撓性材料から成り中空部を有する構成のため、構造が複雑で製造コストが高くなる。また、特許文献３にあっては、アダプタとして合成ゴム等の弾性リングを用いるため低コストではあるが、荷重を十分に与えることができない場合があると共に寿命に問題がある。   However, in Patent Document 1, since a separate compression coil spring is required, the number of parts increases and the cost increases. Moreover, in patent document 2, since an adapter consists of a flexible material and has a hollow part in order to exhibit an elastic function, a structure is complicated and manufacturing cost becomes high. Further, in Patent Document 3, although an elastic ring such as a synthetic rubber is used as an adapter, the cost is low. However, there is a case where a sufficient load cannot be applied and there is a problem in life.

そこで、本発明の目的は、簡易な構成で製造コストが抑制され低コスト化が図られると共に長寿命化が図られる往復動ポンプを始めとした流体機械のシール構造を提供することを目的とする。   Accordingly, an object of the present invention is to provide a sealing structure for a fluid machine such as a reciprocating pump that can reduce the manufacturing cost with a simple configuration, reduce the cost, and extend the service life. .

本発明による流体機械のシール構造は、環状のパッキン（２０）と、当該パッキン（２０）を両側から挟み込むべくパッキン（２０）の片側に配設される環状のオスアダプタ（２１）とを備えた流体機械のシール構造において、オスアダプタ（２１）は、平板からプレスにより成形されて断面略Ｖ字状の凸部（２１ａ）を有し、この断面略Ｖ字状の凸部（２１ａ）がパッキン（２０）を押圧する弾性機能を有することを特徴としている。   The fluid machine seal structure according to the present invention includes an annular packing (20) and an annular male adapter (21) disposed on one side of the packing (20) so as to sandwich the packing (20) from both sides. In the seal structure of a fluid machine, the male adapter (21) is formed by pressing from a flat plate and has a convex portion (21a) having a substantially V-shaped cross section, and the convex portion (21a) having a substantially V-shaped cross section is a packing. It has the elastic function which presses (20).

このような流体機械のシール構造によれば、環状のパッキン（２０）を両側から挟み込むべく当該パッキン（２０）の片側に配設された環状のオスアダプタ（２１）が、断面略Ｖ字状の凸部（２１ａ）を有する構造で、平板からプレスにより製作されるため、簡易な構成で製造コストが抑制され、低コスト化が図られると共に、この断面略Ｖ字状の凸部（２１ａ）の弾性機能により、パッキン（２０）が押圧されるため、パッキン（２０）に荷重が与えられて遊びが無くされ、長寿命化が図られる。   According to the seal structure of such a fluid machine, the annular male adapter (21) disposed on one side of the packing (20) so as to sandwich the annular packing (20) from both sides has a substantially V-shaped cross section. Since the structure having the convex portion (21a) is manufactured from a flat plate by pressing, the manufacturing cost is suppressed with a simple configuration, the cost is reduced, and the convex portion (21a) having a substantially V-shaped cross section is provided. Since the packing (20) is pressed by the elastic function, a load is applied to the packing (20) and play is eliminated, thereby extending the life.

ここで、上記作用を効果的に奏する構成としては、具体的には、流体機械を、往復動ポンプ（１００）とし、パッキン（２０）を、往復動する往復動部材（３）に摺接するＶパッキンとする構成が挙げられる。   Here, as a configuration that effectively exhibits the above action, specifically, the fluid machine is a reciprocating pump (100), and the packing (20) is in sliding contact with a reciprocating member (3) that reciprocates. The structure made into packing is mentioned.

このように本発明によれば、低コスト化及び長寿命化を図ることができる。 As described above, according to the present invention, it is possible to reduce the cost and extend the life.

本発明の一実施形態に係る流体機械のシール構造を適用した往復動ポンプを示す縦断面図である。It is a longitudinal cross-sectional view which shows the reciprocating pump to which the seal structure of the fluid machine which concerns on one Embodiment of this invention is applied. 図１中の要部を示す拡大図である。It is an enlarged view which shows the principal part in FIG. 図１及び図２中のオスアダプタを示す縦断面図である。It is a longitudinal cross-sectional view which shows the male adapter in FIG.1 and FIG.2.

以下、本発明に係る流体機械のシール構造の好適な実施形態について添付図面を参照しながら説明する。図１は、本発明の一実施形態に係る流体機械のシール構造を適用した往復動ポンプを示す縦断面図、図２は、図１中の要部を示す拡大図、図３は、図１及び図２中のオスアダプタを示す縦断面図であり、本実施形態では、流体機械を往復動ポンプとして以下説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a seal structure for a fluid machine according to the invention will be described with reference to the accompanying drawings. 1 is a longitudinal sectional view showing a reciprocating pump to which a seal structure of a fluid machine according to an embodiment of the present invention is applied, FIG. 2 is an enlarged view showing a main part in FIG. 1, and FIG. 3 is a longitudinal sectional view showing the male adapter in FIG. 2, and in this embodiment, the fluid machine will be described as a reciprocating pump.

図１に示すように、往復動ポンプ１００は、クランクシャフト１にコンロッド２を介して連結されたプランジャ３ａ及びセラミックスリーブ（プランジャスリーブ）３ｂから構成される往復動部材３が、クランクシャフト１の回転駆動に従いシリンダ部４内を往復動しポンプ作用を行う往復動ポンプである。なお、図１あっては、往復動部材３の中心線Ａから上側部分は往復動部材３が上死点の場合を示し、下側部分は往復動部材３が下死点の場合を示す。   As shown in FIG. 1, the reciprocating pump 100 includes a reciprocating member 3 composed of a plunger 3 a and a ceramic sleeve (plunger sleeve) 3 b connected to the crankshaft 1 via a connecting rod 2. This is a reciprocating pump that reciprocates in the cylinder part 4 in accordance with driving and performs a pumping action. In FIG. 1, the upper part from the center line A of the reciprocating member 3 shows the case where the reciprocating member 3 is at the top dead center, and the lower part shows the case where the reciprocating member 3 is at the bottom dead center.

この往復動ポンプ１００は、マニホルド５と、このマニホルド５に連結されたクランクケース６とにより外形が構成されている。マニホルド５には、セラミックスリーブ３ｂが往復動するシリンダ部４と、このシリンダ部４の先端側にポンプ室７とが形成され、一方、クランクケース６には、往復動部材３の駆動部を構成するクランクシャフト１、クランクシャフト１に回転可能に連結されたコンロッド２、及び、プランジャ３ａとコンロッド２とを回転可能に連結するピストンピン８が配置されている。   The reciprocating pump 100 has an outer shape constituted by a manifold 5 and a crankcase 6 connected to the manifold 5. The manifold 5 is formed with a cylinder portion 4 in which the ceramic sleeve 3 b reciprocates and a pump chamber 7 at the tip side of the cylinder portion 4, while the crankcase 6 constitutes a drive portion for the reciprocating member 3. A crankshaft 1 is connected, a connecting rod 2 is rotatably connected to the crankshaft 1, and a piston pin 8 is rotatably connected to the plunger 3a and the connecting rod 2.

そして、クランクシャフト１が回転し、コンロッド２及びピストンピン８を介して往復動部材３がクランクシャフト１側に向かって移動することによってポンプ室７が減圧され、マニホルド５に設けられた吸入弁９及び吐出弁１０が各々開及び閉となり、作動流体（液体）は、吸入口１１、吸入弁９を通してポンプ室７へ吸入され、一方、往復動部材３がクランクシャフト１とは反対側に向かって移動することによってポンプ室７が加圧され、吸入弁９及び吐出弁１０が各々閉及び開となり、ポンプ室７の作動流体は吐出弁１０を通して吐出口１２へ吐出され、作動流体を吸入し吐出するポンプ作用を行う構成とされている。   Then, the crankshaft 1 rotates, and the reciprocating member 3 moves toward the crankshaft 1 side via the connecting rod 2 and the piston pin 8, whereby the pump chamber 7 is decompressed and the suction valve 9 provided in the manifold 5. And the discharge valve 10 are opened and closed, respectively, and the working fluid (liquid) is sucked into the pump chamber 7 through the suction port 11 and the suction valve 9, while the reciprocating member 3 is directed to the side opposite to the crankshaft 1. By moving, the pump chamber 7 is pressurized, the suction valve 9 and the discharge valve 10 are closed and opened, respectively, and the working fluid in the pump chamber 7 is discharged to the discharge port 12 through the discharge valve 10 to suck and discharge the working fluid. It is set as the structure which performs the pump action to do.

また、このような往復動ポンプ１００にあっては、作動流体の漏洩を防止するための高圧シール１３及び低圧シール１４と、駆動部の潤滑油の漏洩を防止するためのオイルシール１５とが、往復動部材３と液密に摺接するように、ポンプ室７側からクランクシャフト１側に向けてこの順に配設され、高圧シール１３と低圧シール１４との間には、連通路１６を介して吸入口１１と連通し当該吸入口１１から吸入された作動流体の一部によって往復動部材３（セラミックスリーブ３ｂ）を冷却するための冷却流路１７が設けられている。   Further, in such a reciprocating pump 100, the high pressure seal 13 and the low pressure seal 14 for preventing the leakage of the working fluid, and the oil seal 15 for preventing the leakage of the lubricating oil of the drive unit, Arranged in this order from the pump chamber 7 side to the crankshaft 1 side so as to be in fluid-tight sliding contact with the reciprocating member 3, and between the high-pressure seal 13 and the low-pressure seal 14 via a communication path 16. A cooling channel 17 is provided in communication with the suction port 11 for cooling the reciprocating member 3 (ceramic sleeve 3b) by a part of the working fluid sucked from the suction port 11.

ここで、高圧シール１３は、ポンプ室７の高圧流体がシリンダ部４と往復動部材３（セラミックスリーブ３ｂ）との間を伝って駆動部側へ漏出するのを防止するためのものであり、そのシール構造は、図２に示すように、軸線方向（往復動部材３の往復動方向）に積層された複数のＶパッキン２０と、この積層されたＶパッキン２０を両側から挟み込むオスアダプタ２１及びメスアダプタ２２と、を備える構成とされている。   Here, the high-pressure seal 13 is for preventing the high-pressure fluid in the pump chamber 7 from leaking to the drive part side through the cylinder part 4 and the reciprocating member 3 (ceramic sleeve 3b). As shown in FIG. 2, the seal structure includes a plurality of V packings 20 stacked in the axial direction (reciprocating direction of the reciprocating member 3), a male adapter 21 sandwiching the stacked V packings 20 from both sides, and The female adapter 22 is provided.

Ｖパッキン２０は、例えばゴム等より成り、円環状に構成されてその断面が略Ｖ字状を成すように構成されている。このＶパッキン２０は、その内周側が、往復動部材３（セラミックスリーブ３ｂ）に摺接し、その外周側が、マニホルド５に形成された高圧シール１３収容用の拡径部５ａの内周面に密接する。そして、ここでは、Ｖ字を構成する凸部がメスアダプタ２２側に向かうように配設されている。また、メスアダプタ２２は、円環状に構成されて軸線方向の一方側（図示右側）に配設され、Ｖパッキン２０をオスアダプタ２１との間で良好に挟み込むべく、Ｖパッキン２０のＶ字を構成する凸部が進入する凹部を有する構成とされている。   The V packing 20 is made of, for example, rubber, and is formed in an annular shape so that the cross section thereof is substantially V-shaped. The V packing 20 has an inner peripheral side that is in sliding contact with the reciprocating member 3 (ceramic sleeve 3 b), and an outer peripheral side that is in close contact with the inner peripheral surface of the enlarged diameter portion 5 a that accommodates the high pressure seal 13 formed in the manifold 5. To do. And here, the convex part which comprises V character is arrange | positioned so that it may go to the female adapter 22 side. In addition, the female adapter 22 is formed in an annular shape and disposed on one side (the right side in the drawing) in the axial direction, and the V-shaped packing 20 has a V-shaped configuration so that the V-packing 20 can be sandwiched between the male adapter 21 and the adapter. It is set as the structure which has the recessed part into which the convex part to comprise enters.

ここで、特に本実施形態のオスアダプタ２１は、図２及び図３に示すように、円環状に構成されてその断面が略Ｖ字状の凸部２１ａを有する構成とされ、当該凸部２１ａがメスアダプタ２２側に向かうように配設されている。このオスアダプタ２１は、図３に示すように、Ｖ字を構成する外周側の端部が、軸線方向に対して半径方向外側に垂直に延びる円環状の鍔部２１ｂを有し、この鍔部２１ｂの底面（図示左側面）は平面とされ、この平面が、図２に示すように、上記高圧シール１３収容用の拡径部５ａの端面５ｂに面接触する構成とされている。また、オスアダプタ２１のＶ字を構成する内周側の端部２１ｃは、拡径部５ａの端面５ｂに対して軸線方向に離間するように構成されている。   Here, in particular, the male adapter 21 of the present embodiment, as shown in FIGS. 2 and 3, is configured to have an annular shape having a substantially V-shaped convex portion 21a, and the convex portion 21a. Is arranged to face the female adapter 22 side. As shown in FIG. 3, the male adapter 21 has an annular flange 21b whose end on the outer peripheral side constituting the V-shape extends perpendicularly outward in the radial direction with respect to the axial direction. The bottom surface (left side surface in the drawing) of 21b is a flat surface, and as shown in FIG. 2, this flat surface is in surface contact with the end surface 5b of the enlarged diameter portion 5a for accommodating the high-pressure seal 13. Moreover, the inner peripheral side end 21c constituting the V-shape of the male adapter 21 is configured to be spaced apart in the axial direction with respect to the end surface 5b of the enlarged diameter portion 5a.

このように円環状に構成されて断面略Ｖ字状の凸部２１ａを有するオスアダプタ２１は、特に本実施形態にあっては、平板からプレスにより成形されている。なお、ここでは、オスアダプタ２１の断面形状は、肉厚３ｍｍ以下でその厚みは一定とされている。   In this way, the male adapter 21 having an annular shape and having a convex portion 21a having a substantially V-shaped cross section is molded from a flat plate by a press. Here, the cross-sectional shape of the male adapter 21 is 3 mm or less in thickness, and its thickness is constant.

斯くの如く、オスアダプタ２１は、平板からプレスにより成形されているが、薄肉であり、Ｖ字を構成する外周側の鍔部２１ｂがマニホルド５の端面５ｂに面接触すると共に、Ｖ字を構成する内周側の端部２１ｃがマニホルド５の端面５ｂに対して軸線方向に離間する構成とされているため、Ｖ字の頂点及び内周側は軸線方向に撓むことができる。   As described above, the male adapter 21 is formed from a flat plate by pressing, but is thin, and the outer peripheral flange portion 21b constituting the V-shape is in surface contact with the end surface 5b of the manifold 5 and constitutes the V-shape. Since the inner peripheral side end 21c is configured to be separated from the end surface 5b of the manifold 5 in the axial direction, the V-shaped apex and the inner peripheral side can be bent in the axial direction.

すなわち、オスアダプタ２１は、その断面略Ｖ字状の凸部２１ａが、メスアダプタ２２との間に配置されている複数のＶパッキン２０をメスアダプタ２２側に押圧する弾性機能を備える。   That is, the male adapter 21 has an elastic function in which the convex portion 21 a having a substantially V-shaped cross section presses the plurality of V packings 20 disposed between the female adapter 22 and the female adapter 22.

このような構成を有するシール構造においては、円環状のＶパッキン２０を両側から挟み込むべくＶパッキン２０の片側に配設された円環状のオスアダプタ２１が、断面略Ｖ字状の凸部２１ａを有する構造で、平板からプレスにより製作されるため、簡易な構成で製造コストが抑制され、低コスト化が図られると共に、この断面略Ｖ字状の凸部２１ａの弾性機能により、Ｖパッキン２０が押圧されるため、Ｖパッキン２０に荷重が与えられて遊びが無くされ（締め代（シメシロ）が補足され）、長寿命化が図られる。   In the seal structure having such a configuration, an annular male adapter 21 disposed on one side of the V packing 20 to sandwich the annular V packing 20 from both sides has a convex portion 21a having a substantially V-shaped cross section. Since it is manufactured from a flat plate by a press, the manufacturing cost is reduced with a simple configuration, the cost is reduced, and the elastic function of the convex portion 21a having a substantially V-shaped cross section makes the V packing 20 Since it is pressed, a load is applied to the V-packing 20 to eliminate play (supplemented with a tightening allowance) and a longer life is achieved.

また、本実施形態によれば、上述したオスアダプタ２１の弾性機能により、組み立て初期のＶパッキン２０の遊びや締め代（シメシロ）も調整することができる。   Further, according to the present embodiment, the play and tightening allowance of the V-packing 20 in the initial assembly can be adjusted by the elastic function of the male adapter 21 described above.

また、本実施形態によれば、Ｖ字を構成する外周側の鍔部２１ｂの底面が平面とされてマニホルド５の端面５ｂに面接触するため、高圧シール１３を組み立てるときのオスアダプタ２１のＶ字の頂点の位置の寸法精度を高めることができる。   Further, according to the present embodiment, since the bottom surface of the flange portion 21b on the outer peripheral side constituting the V-shape is a flat surface and comes into surface contact with the end surface 5b of the manifold 5, the V of the male adapter 21 when the high-pressure seal 13 is assembled. The dimensional accuracy of the position of the character vertex can be increased.

因みに、金型成形されたＶパッキンには厚さにバラツキがあり、特に厚みがプラスの組み合わせでは締め代が過剰に増えてしまい、組み立てが困難になることがあるが、本実施形態によれば、オスアダプタ２１の弾性機能によりＶパッキンを正常に組み立てることができる。   By the way, there are variations in the thickness of the V-molded packing, especially in the case of a plus thickness, the tightening margin increases excessively, which may make assembly difficult. The V-packing can be normally assembled by the elastic function of the male adapter 21.

以上、本発明をその実施形態に基づき具体的に説明したが、本発明は上記実施形態に限定されるものではなく、例えば、上記実施形態においては、特に好適であるとして、パッキンをＶパッキン２０としているが、Ｕパッキン等に対しても適用可能である。また、往復動ポンプ以外の流体機械に対しても適用可能である。   The present invention has been specifically described above based on the embodiment. However, the present invention is not limited to the above-described embodiment. However, it can also be applied to U packing and the like. Moreover, it is applicable also to fluid machines other than a reciprocating pump.

３…往復動部材、３ｂ…セラミックスリーブ、１３…高圧シール、２０…Ｖパッキン（パッキン）、２１…オスアダプタ、２１ａ…凸部、１００…往復動ポンプ（流体機械）。   DESCRIPTION OF SYMBOLS 3 ... Reciprocating member, 3b ... Ceramic sleeve, 13 ... High pressure seal, 20 ... V packing (packing), 21 ... Male adapter, 21a ... Convex part, 100 ... Reciprocating pump (fluid machine).

Claims (2)

流体機械に用いられるシール構造であって、環状のパッキン（２０）と、当該パッキン（２０）を両側から挟み込むべく前記パッキン（２０）の片側に配設される環状のオスアダプタ（２１）とを備えた流体機械のシール構造において、
前記オスアダプタ（２１）は、平板からプレスにより成形されて断面略Ｖ字状の凸部（２１ａ）を有し、この断面略Ｖ字状の凸部（２１ａ）が前記パッキン（２０）を押圧する弾性機能を有することを特徴とする流体機械のシール構造。 A sealing structure used in a fluid machine, comprising: an annular packing (20); and an annular male adapter (21) disposed on one side of the packing (20) to sandwich the packing (20) from both sides. In the fluid machine seal structure provided,
The male adapter (21) is formed by pressing from a flat plate and has a convex portion (21a) having a substantially V-shaped cross section, and the convex portion (21a) having a substantially V-shaped cross section presses the packing (20). A fluid machine sealing structure characterized by having an elastic function. 前記流体機械は、往復動ポンプ（１００）であり、
前記パッキン（２０）は、往復動する往復動部材（３）に摺接するＶパッキンであることを特徴とする請求項１記載の流体機械のシール構造。 The fluid machine is a reciprocating pump (100);
The seal structure for a fluid machine according to claim 1, wherein the packing (20) is a V-packing that is in sliding contact with a reciprocating member (3) that reciprocates.
JP2009161940A 2009-07-08 2009-07-08 Seal structure for fluid machine Pending JP2011017376A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US20150093264A1 (en) * 2013-09-30 2015-04-02 Leuco S.P.A. Pump
JP2015194095A (en) * 2014-03-31 2015-11-05 株式会社丸山製作所 reciprocating pump
US9932973B2 (en) 2012-05-21 2018-04-03 Maruyama Mfg. Co., Inc. Reciprocating pump with high-pressure seal

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JPH0135978Y2 (en) * 1984-07-31 1989-11-01
JPH04362375A (en) * 1991-06-10 1992-12-15 Nippon Pillar Packing Co Ltd Shaft sealing device

Patent Citations (3)

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US2815970A (en) * 1955-02-02 1957-12-10 Wagner Electric Corp Multiple shaft seal
JPH0135978Y2 (en) * 1984-07-31 1989-11-01
JPH04362375A (en) * 1991-06-10 1992-12-15 Nippon Pillar Packing Co Ltd Shaft sealing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9932973B2 (en) 2012-05-21 2018-04-03 Maruyama Mfg. Co., Inc. Reciprocating pump with high-pressure seal
US20150093264A1 (en) * 2013-09-30 2015-04-02 Leuco S.P.A. Pump
CN104612958A (en) * 2013-09-30 2015-05-13 莱乌科股份公司 A pump
US9677548B2 (en) * 2013-09-30 2017-06-13 Leuco S.P.A. Pump
JP2015194095A (en) * 2014-03-31 2015-11-05 株式会社丸山製作所 reciprocating pump

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