JP2010019083A - Shaft sealing device - Google Patents

Shaft sealing device Download PDF

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JP2010019083A
JP2010019083A JP2008177839A JP2008177839A JP2010019083A JP 2010019083 A JP2010019083 A JP 2010019083A JP 2008177839 A JP2008177839 A JP 2008177839A JP 2008177839 A JP2008177839 A JP 2008177839A JP 2010019083 A JP2010019083 A JP 2010019083A
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shaft
sealing ring
fixed
hole
ring
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Masahiko Fukuda
正彦 福田
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Tsurumi Mfg Co Ltd
株式会社鶴見製作所
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Priority to JP2008177839A priority Critical patent/JP2010019083A/en
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<P>PROBLEM TO BE SOLVED: To provide a suitable shaft sealing device for a pump which can maintain good assemblability at low cost without manufacturing an exclusive shaft, prevents abnormal wear of a shaft even in liquid containing sand, slurry or the like, prevents liquid from staying in an annular gap at an outer circumference of a shaft lead-in part, and can maintain sealing performance without causing poor start of the pump due to accumulation of deposit, biting into sliding surfaces, and surface roughness and surface open due to thermal deformation and the like. <P>SOLUTION: A fixed sealing ring 6 is supported by a housing 1, the shaft lead-in part 7 is loosely fitted in a rotary sealing ring 9, the fixed sealing ring 6, and a shaft through-hole 4, and an annular gap 8 is retained at an outer circumference thereof. A bellows 10 of the rotary sealing ring 9 rotating together with a shaft right above the fixed sealing ring 6 and touching and sliding on the fixed sealing ring 6 by spring biasing is fitted to the shaft lead-in part 7. Induction agitation edges 13m, 13h are provided on one or both of inner circumferences of the shaft through-hole 4 and the fixed seal ring 6 below a turning agitation edge 13s at an inner circumference of the rotary sealing ring 9 projectingly provided in a falling gradient to rotation of a shaft in the annular gap 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ポンプ等に装着される軸封装置に関するものである。   The present invention relates to a shaft seal device mounted on a pump or the like.
周知のようにポンプでは一般に、液側のポンプ室と軸封装置が内装される軸封室との間に介在する隔壁の中央に回転軸の貫通孔が穿設されており、該貫通孔の上端外周に凹設された環溝には軸封装置の固定シールリングが嵌着され、該固定シールリングおよび回転軸の貫通孔に遊嵌された回転軸の導下部の外周には環状間隙が保有され、固定シールリングの直上において回転軸と共に回転しバネ付勢により固定シールリングと摺接するよう回転シールリングが回転軸の導下部に嵌合されているが、上記環状間隙に停留している液体中の異物や摺動発熱等により析出される固形物等の異物が固定シールリングおよび回転軸の貫通孔の内周に付着し、それが堆積してポンプの始動不良の原因となり、また、上記異物が固定シールリングと回転シールリングとの摺接面間へ噛み込んで面荒れや面開きを惹起してシール性能が阻害されることになる。このような問題を解消させるため、回転軸に設けた回転シールリングと軸ケースに設けた固定シールリングとの密封端面で軸封部を形成し、上記固定シールリングを上記軸ケースに、断面略L字形でその筒状部と鍔状部とに亘つて補強リングを埋設したリング状パッキンで保持している軸封装置において、上記パッキンの鍔状部の内周縁に軸心方向に所定長さを有する内筒部を一体的に突設し、その内筒部の上記回転軸と非接触な内周面に上記回転軸の回転方向と逆方向又は傾斜方向に沿う溝又は突起を設けることにより、軸封部への微粒子の侵入防止効果が摩耗等で損われることなく長期間確実に得られると共に余計な動力損失も受けず、しかも従来と比べて部品点数を減少できると共に軸長も短くできる軸封装置を提供することを目的とするものがある(例えば、特許文献1参照)。   As is well known, in a pump, a through hole of a rotating shaft is generally formed in the center of a partition wall interposed between a pump chamber on the liquid side and a shaft seal chamber in which a shaft seal device is installed. A fixed seal ring of the shaft seal device is fitted in the annular groove recessed in the outer periphery of the upper end, and an annular gap is formed on the outer periphery of the fixed seal ring and the guide shaft of the rotary shaft loosely fitted in the through hole of the rotary shaft. The rotating seal ring is fitted to the guiding lower portion of the rotating shaft so as to rotate together with the rotating shaft immediately above the fixed seal ring and come into sliding contact with the fixed seal ring by spring bias, but is retained in the annular gap. Foreign matter such as foreign matter in the liquid or solid matter deposited due to sliding heat generation adheres to the inner circumference of the fixed seal ring and the through hole of the rotating shaft, and it accumulates, causing pump start failure, The foreign matter is fixed on the fixed seal ring and the rotating seal. So that the sealing performance is inhibited by inducing the bite into between sliding surfaces face roughness and surface aperture of the ring. In order to solve such a problem, a shaft sealing portion is formed by a sealing end surface of the rotary seal ring provided on the rotary shaft and the fixed seal ring provided on the shaft case. In a shaft sealing device that is held in a ring-shaped packing in which a reinforcing ring is embedded across the cylindrical part and the bowl-shaped part in an L-shape, a predetermined length in the axial direction is provided on the inner periphery of the bowl-shaped part of the packing. And a groove or a protrusion along the direction opposite to the rotation direction of the rotation shaft or an inclined direction is provided on the inner peripheral surface of the inner cylinder portion that is not in contact with the rotation shaft. In addition, the effect of preventing the entry of fine particles into the shaft seal can be reliably obtained for a long time without being damaged by wear, etc., and there is no extra power loss, and the number of parts can be reduced and the shaft length can be shortened compared to the conventional one. To provide a shaft seal device There is shall (e.g., see Patent Document 1).
また、別の公知例として、シャフト導下部の外周にスパイラル溝を刻設して、シャフトの回転に伴うネジポンプ作用で異物をポンプ室側へ押し出させようとするものもある(例えば、特許文献2参照)。
実開昭56−035951号公報 (第1−4図) 特開2000−274380号公報 (図1)
As another known example, a spiral groove is formed on the outer periphery of the shaft guide lower part so that foreign matter is pushed out to the pump chamber side by a screw pump action accompanying rotation of the shaft (for example, Patent Document 2). reference).
Japanese Utility Model Publication No. 56-035951 (Fig. 1-4) JP 2000-274380 A (FIG. 1)
しかし特許文献1の構造では、固定シールリングの外周側面および背面を完全に囲繞する弾性体の熱伝導率の低いリング状パッキンの介装により軸ケースへの熱伝導が断熱されてしまうため、低温側の温度の低いポンプ室の液側への吸熱による冷却作用を奏し得ないことから、必然的に摺動面の摺動発熱の冷却効果が著しく低く、摺動発熱による異物の析出も多く且つ摺動面の熱歪みによる面荒れも激しいことから、摺動面間への析出異物の噛み込みや面開きおよび面荒れ等の発生により、シール寿命が短くなりシール性能を保持することができない。   However, in the structure of Patent Document 1, the heat conduction to the shaft case is insulated by the insertion of the ring-shaped packing having a low thermal conductivity of the elastic body that completely surrounds the outer peripheral side surface and the back surface of the fixed seal ring. The cooling effect due to heat absorption to the liquid side of the pump chamber having a low temperature on the side cannot be achieved, so the cooling effect of sliding heat generation on the sliding surface is inevitably remarkably low, and foreign matter is often deposited due to sliding heat generation. Since the surface roughness due to thermal distortion of the sliding surface is severe, the seal life is shortened and the sealing performance cannot be maintained due to the occurrence of a foreign matter biting between the sliding surfaces, the opening of the surface and the surface roughness.
また特許文献2の構造では、汎用のシャフトを使用することができず専用のものを製作することが必要なためコスト高となり、且つシャフトの強度にも問題を残すことになる。また、回転密封環の組込み時にスパイラル溝によってOリング等付帯部材が損傷され易いという、組立上の困難性をも伴うことになる。更にまた、特許文献2の構造によれば、油中など粘性の強い液体中での使用には適しているが、工事現場のように砂やスラリー等の異物を含む液体中で使用すれば、シャフトに刻設されているスパイラル溝が異常摩耗を来たし、シャフトの早期折損事故を招く要因となる。また、上記スパイラル溝の摩耗に伴う補修作業についてはシャフト全体の交換という大修理となって多大の修理費用を要することになる。   Further, in the structure of Patent Document 2, a general-purpose shaft cannot be used, and it is necessary to manufacture a dedicated one. Therefore, the cost is high and the strength of the shaft also remains a problem. In addition, there is a difficulty in assembling that an accessory member such as an O-ring is easily damaged by the spiral groove when the rotary seal ring is assembled. Furthermore, according to the structure of Patent Document 2, it is suitable for use in a highly viscous liquid such as oil, but if used in a liquid containing foreign matter such as sand or slurry as in a construction site, The spiral groove engraved on the shaft causes abnormal wear, which causes an early breakage of the shaft. Further, the repair work associated with the wear of the spiral groove is a large repair of replacing the entire shaft, and requires a great repair cost.
本発明は前述の課題を解消して、専用のシャフトを製作する事を要せず汎用のシャフトを使用して強度を低下させることなく、安価で組立作業も容易に行われ且つ砂やスラリー等の異物によるシャフトの異常摩耗がなく、シャフト導下部外周の環状間隙内の液体の停留を阻止し、異物および析出物の堆積によるポンプの始動不良を来たすことがなく、且つ摺動面の摺動発熱を効率良く冷却することにより、摺接面間の上記析出物や液中の異物の噛み込みおよび熱歪み等による面荒れや面開きを生じさせることもなく、安定したシール性能が保持され、特にポンプ用として好適な軸封装置を提供することを目的とする。   The present invention solves the above-mentioned problems, does not require the production of a dedicated shaft, uses a general-purpose shaft, does not reduce the strength, can be easily assembled at low cost, and can be sand, slurry, etc. There is no abnormal wear of the shaft due to foreign matter, prevents the liquid from staying in the annular gap at the outer periphery of the shaft guide, prevents the pump from starting poorly due to the accumulation of foreign matter and deposits, and slides on the sliding surface By efficiently cooling the heat generation, stable sealing performance is maintained without causing surface roughening or surface opening due to the above-mentioned precipitates between the sliding contact surfaces and foreign matter in the liquid, and thermal distortion, etc. An object is to provide a shaft seal device particularly suitable for a pump.
本発明に係る請求項1および2記載の軸封装置では、シャフト貫通孔の上端外側に環溝を凹設して固定密封環支承用のハウジングを構成し、軸封装置の固定密封環を上記環溝内へ該固定密封環の背端面と該環溝の底面とを当接するように嵌着させ、原動機のシャフト導下部を上記固定密封環およびシャフト貫通孔に遊嵌させ、上記固定密封環の直上においてシャフト導下部に遊嵌される回転密封環は、リテーナにより結合されたベローズがシャフト導下部に嵌着されることによってシャフトと共に回転され、コイルスプリングのバネ付勢により固定密封環と摺接し、上記回転密封環と固定密封環およびシャフト貫通孔の各内周とシャフト導下部の外周に環状間隙を保有させ、上記固定密封環内周径を回転密封環内周と同径もしくは若干大径に形成し、該固定密封環内周面より内方にシャフトの回転方向に従って旋回前面側を下り勾配に導延される旋回撹拌縁を上記環状間隙に面する回転密封環の内周面に突設形成させると共に、上記シャフト貫通孔内周径を固定密封環内周と同径もしくは若干大径に形成し、該シャフト貫通孔内周面より内方にシャフトの回転方向に向かって対向面側を下り勾配に導延される誘導撹拌縁を、上記記環状間隙に面する上記旋回撹拌縁の下方に突設形成させることを最も主要な特徴とする。   In the shaft seal device according to the first and second aspects of the present invention, a housing for a fixed seal ring support is formed by forming a ring groove on the outer side of the upper end of the shaft through-hole, and the fixed seal ring of the shaft seal device is configured as described above. The fixed seal ring is fitted into the ring groove so that the back end surface of the fixed seal ring and the bottom surface of the ring groove are in contact with each other, and the shaft guide lower part of the prime mover is loosely fitted into the fixed seal ring and the shaft through-hole. The rotary seal ring that is loosely fitted to the shaft guide lower portion directly above the shaft is rotated together with the shaft by fitting the bellows joined by the retainer to the shaft guide lower portion, and is slid with the fixed seal ring by the spring bias of the coil spring. In contact with each other, and an annular gap is held on the inner periphery of each of the rotary seal ring, the fixed seal ring and the shaft through hole and on the outer periphery of the shaft guide lower part, and the inner diameter of the fixed seal ring is the same as or slightly larger than the inner circumference of the rotary seal ring. To diameter And a swirl stirrer edge extending inward from the inner peripheral surface of the fixed seal ring in accordance with the rotational direction of the shaft and projecting downward on the inner peripheral surface of the rotary seal ring facing the annular gap. The inner diameter of the shaft through-hole is formed to be the same diameter or slightly larger than the inner diameter of the fixed sealing ring, and the opposite surface side is directed inward from the inner surface of the shaft through-hole toward the rotational direction of the shaft. The most important feature is that an induction stirring edge that is guided in a descending slope is formed to project below the swirling stirring edge that faces the annular gap.
そして、請求項1記載の軸封装置では、前記シャフト貫通孔内周径を固定密封環内周と同径もしくは若干大径に形成し、該シャフト貫通孔内周面より内方にシャフトの回転方向に向かって対向面側を下り勾配に導延される誘導撹拌縁を、前記環状間隙に面する前記旋回撹拌縁の下方の固定密封環またはシャフト貫通孔の何れか一方の内周面に突設形成させたことを特徴とする。   In the shaft seal device according to claim 1, the inner diameter of the shaft through-hole is formed to be the same diameter or slightly larger than the inner diameter of the fixed sealing ring, and the shaft rotates inward from the inner peripheral surface of the shaft through-hole. The induction stirring edge that is guided downwardly on the opposite surface side in the direction protrudes to the inner peripheral surface of either the fixed sealing ring or the shaft through hole below the swirl stirring edge that faces the annular gap. It is characterized by having been formed.
また、請求項2記載の軸封装置では、前記シャフト貫通孔内周径を固定密封環内周と同径もしくは若干大径に形成し、該シャフト貫通孔内周面より内方にシャフトの回転方向に向かって対向面側を下り勾配に導延される誘導撹拌縁を、前記環状間隙に面する前記旋回撹拌縁の下方の固定密封環およびシャフト貫通孔の両内周面に突設形成させたことを特徴とする。   Further, in the shaft seal device according to claim 2, the inner diameter of the shaft through hole is formed to be the same diameter or slightly larger than the inner diameter of the fixed sealing ring, and the shaft rotates inward from the inner peripheral surface of the shaft through hole. Inductive agitation edges, which are led down toward the direction toward the direction, are formed so as to protrude from both inner peripheral surfaces of the fixed sealing ring and the shaft through hole below the swirl agitation edge facing the annular gap. It is characterized by that.
本発明軸封装置によれば、専用のシャフトを製作することを要せず汎用のシャフトを使用して強度を低下させることなく、安価で組立作業も容易に行われ、回転密封環内周に突設形成される旋回撹拌縁の旋回による下流作用と環状間隙内に遊嵌されたシャフト導下部外周表面の旋回摩擦による旋回流作用との相乗作用により、該環状間隙内には強力な旋回流が発生し、上記旋回撹拌縁の下方に突設形成される誘導撹拌縁の誘導作用により、該旋回流は乱されることなく円滑に下流誘導されるので極めて効率良くポンプ室側へ押し出されるため、環状間隙内における液体の停留を阻止すると共に冷却作用を生じ、異物および析出物の堆積によるポンプの始動不良を来たすことがない。そして、上記旋回撹拌縁には、上記下流作用に加えて回転密封環内周面からシャフト導下部外周面に向う求心力が作用されることから、固定密封環と回転密封環との摺接面間の内周から外周に向かってシールするアウトサイド形の本発明の軸封装置では、上記求心力が該摺動面へのシール対象である異物を含む液体の侵入を阻止する方向に作用されるため、シール性能において極めて有効に機能されるので、上記摺接面間の析出物や液中の異物等の噛み込みによる面荒れや面開きを生じることもなく、安定したシール性能が保持され、砂やスラリー等の異物を含む液体に対してもシャフトの異常摩耗がなく、特にポンプ用として好適な軸封装置が得られるという利点がある。   According to the shaft seal device of the present invention, it is not necessary to manufacture a dedicated shaft, and a general-purpose shaft is used to reduce the strength, and the assembly work is easily performed. A strong swirl flow is generated in the annular gap due to a synergistic effect of the downstream action by swirling of the swirling stirring edge formed in a projecting manner and the swirl flow action by swirling friction on the outer peripheral surface of the shaft guide portion loosely fitted in the annular gap. And the swirling flow is smoothly guided downstream without being disturbed by the induction action of the induction stirring edge protrudingly formed below the swirling stirring edge, so that it is pushed out to the pump chamber side very efficiently. In addition, the liquid is prevented from staying in the annular gap, and a cooling action is generated, so that the starting failure of the pump due to the accumulation of foreign matters and precipitates is not caused. Further, in addition to the downstream action, a centripetal force from the inner peripheral surface of the rotating seal ring toward the outer peripheral surface of the shaft guide acts on the swirling stirring edge. In the outside-type shaft seal device of the present invention that seals from the inner periphery to the outer periphery, the centripetal force acts in a direction that prevents the intrusion of liquid containing foreign matter to be sealed on the sliding surface. Since it functions extremely effectively in sealing performance, stable sealing performance is maintained without causing surface roughening or surface opening due to biting of precipitates between the sliding contact surfaces or foreign matter in the liquid. There is also an advantage that a shaft seal device suitable for a pump can be obtained without causing abnormal wear of the shaft even for liquids containing foreign substances such as slurry.
更に、回転密封環と固定密封環との摺接面の摺動発熱が該固定密封環の背端面と該環溝の底面との当接面の熱伝導作用により低温側のポンプ室の液へ吸熱させる冷却作用により、摺接面の摺動発熱がより一層低く抑えられるため、摺動発熱による摺動面の上記析出物の発生および熱歪み等が抑制されることにより、より一層シール性能の安定に寄与するという効果も有している。   Further, the sliding heat generation of the sliding contact surface between the rotary seal ring and the fixed seal ring is transferred to the liquid in the pump chamber on the low temperature side by the heat conduction action of the contact surface between the back end surface of the fixed seal ring and the bottom surface of the ring groove. Due to the cooling action that absorbs heat, the sliding heat generation on the sliding contact surface is further suppressed, so the occurrence of the above precipitates on the sliding surface due to the sliding heat generation and thermal distortion are suppressed, thereby further improving the sealing performance. It also has the effect of contributing to stability.
本発明の軸封装置の実施の形態を実施例に基づき、添付図面の図1ないし図5を参照して詳細に説明する。   An embodiment of a shaft seal device of the present invention will be described in detail with reference to FIGS. 1 to 5 of the accompanying drawings based on examples.
図1ないし図5において、1はポンプ室2とオイル室3との間に介在する隔壁の中央に穿設されたシャフト貫通孔4の上端外側に環溝5が凹設された固定密封環支承用のハウジングであり、軸封装置の固定密封環6を上記環溝5内へ該固定密封環6の背端面と該環溝5の底面とを当接するように嵌着させる。7は原動機のシャフト導下部であり、固定密封環6およびシャフト貫通孔4に遊嵌させる。9は固定密封環6の直上においてシャフト導下部7に遊嵌される回転密封環であり、該回転密封環9はリテーナ11により結合されたベローズ10がシャフト導下部7に嵌着されることによってシャフトと共に回転し、コイルスプリング12のバネ付勢により固定密封環6と摺接する。そして、上記回転密封環9と固定密封環6およびシャフト貫通孔4の各内周とシャフト導下部7の外周に環状間隙8を保有させ、上記固定密封環6内周径を回転密封環9内周と同径もしくは若干大径に形成し、該固定密封環6内周面より内方にシャフトの回転方向に従って旋回前面側を下り勾配に導延される旋回撹拌縁13sを上記環状間隙8に面する回転密封環9の内周面に突設形成させる。更に、上記シャフト貫通孔4内周径を固定密封環6内周と同径もしくは若干大径に形成し、該シャフト貫通孔4内周面より内方にシャフトの回転方向に向かって対向面側を下り勾配に導延される固定密封環6内周面の誘導撹拌縁13m或はシャフト貫通孔内周面の誘導撹拌縁13hを上記環状間隙8に面する上記旋回撹拌縁13sの下方の固定密封環6またはシャフト貫通孔4の何れか一方の内周面に突設形成させてもよいが、固定密封環6およびシャフト貫通孔4の両内周面に突設形成させる態様とすることが望ましい。   1 to 5, reference numeral 1 denotes a fixed sealing ring bearing in which an annular groove 5 is recessed outside an upper end of a shaft through hole 4 formed in the center of a partition wall interposed between a pump chamber 2 and an oil chamber 3. The fixed seal ring 6 of the shaft seal device is fitted into the ring groove 5 so that the back end surface of the fixed seal ring 6 and the bottom surface of the ring groove 5 are in contact with each other. Reference numeral 7 denotes a shaft guide lower part of the prime mover, which is loosely fitted into the fixed sealing ring 6 and the shaft through hole 4. Reference numeral 9 denotes a rotary seal ring that is loosely fitted to the shaft guide lower portion 7 immediately above the fixed seal ring 6. The rotary seal ring 9 is formed by fitting the bellows 10 coupled by the retainer 11 to the shaft guide lower portion 7. It rotates together with the shaft and comes into sliding contact with the fixed sealing ring 6 by the spring bias of the coil spring 12. Then, an annular gap 8 is held in each inner periphery of the rotary seal ring 9, the fixed seal ring 6 and the shaft through-hole 4 and the outer periphery of the shaft guide lower part 7, and the inner peripheral diameter of the fixed seal ring 6 is set in the rotary seal ring 9. A swirling stirring edge 13s that is formed to have the same diameter as the circumference or slightly larger in diameter and that extends inward from the inner circumferential surface of the fixed sealing ring 6 in a descending gradient along the rotation direction of the shaft is formed in the annular gap 8 Projectingly formed on the inner peripheral surface of the rotating seal ring 9 facing. Further, the inner diameter of the shaft through-hole 4 is formed to be the same diameter as or slightly larger than the inner diameter of the fixed sealing ring 6, and the opposite surface side toward the rotation direction of the shaft inward from the inner peripheral surface of the shaft through-hole 4. Is fixed below the swirl stirring edge 13s facing the annular gap 8 with the induction stirring edge 13m on the inner peripheral surface of the fixed sealing ring 6 or the induction stirring edge 13h on the inner peripheral surface of the shaft through hole. Although it may be formed projectingly on the inner peripheral surface of either one of the sealing ring 6 or the shaft through hole 4, it may be formed so as to project on both inner peripheral surfaces of the fixed sealing ring 6 and the shaft through hole 4. desirable.
シャフトが回転してポンプが駆動すれば、環状間隙8内の液体は回転密封環9内周に突設形成される旋回撹拌縁13sの旋回による下流作用と環状間隙8内に遊嵌されたシャフト導下部7外周表面の旋回摩擦による旋回流作用との相乗作用により、該環状間隙8内に発生する強力な旋回流が、上記旋回撹拌縁13sの下方の固定密封環6やシャフト貫通孔4の内周面に突設形成された誘導撹拌縁13m,13hの誘導作用により、該旋回流が乱されることなく円滑に下流誘導されるので効率良くポンプ室2側へ押し出され、環状間隙8内に停留することがないので、液中の異物や析出物が固定密封環6やシャフト貫通孔4の内周に付着して堆積することを防止するのみでなく、冷却作用によって固形物の析出そのものを防止することにより堆積等によるポンプの始動不良を来たすことがない。そして、上記旋回撹拌縁13sには上記下流作用に加えて回転密封環9内周面からシャフト導下部7外周面に向う求心力が作用されることから、固定密封環6と回転密封環9との摺接面間の内周から外周に向かってシールするアウトサイド形の本発明の軸封装置では、上記求心力が該摺動面へのシール対象である異物を含む液体の侵入を阻止する方向に作用されるため、シール性能において極めて有効に機能されるので、上記摺接面間の析出物や液中の異物等の噛み込みによる面荒れや面開きを生じることもなく、安定したシール性能が保持され、砂やスラリー等の異物を含む液体に対してもシャフトの異常摩耗がなく、また回転密封環9の組込み時にベローズ10等付帯部材が損傷されることもない。更に、回転密封環9と固定密封環6との摺接面の摺動発熱が該固定密封環6の背端面と該環溝5の底面との当接面の熱伝導作用により低温側のポンプ室2の液へ吸熱させることで、より一層効率の良い冷却作用を発揮することができる。   When the shaft rotates and the pump is driven, the liquid in the annular gap 8 is caused to rotate downstream of the swirling stirring edge 13 s formed to project from the inner periphery of the rotary sealing ring 9 and the shaft loosely fitted in the annular gap 8. Due to the synergistic effect with the swirling flow action caused by the swirling friction on the outer peripheral surface of the guiding lower portion 7, a strong swirling flow generated in the annular gap 8 is caused by The swirling flow is smoothly guided downstream without being disturbed by the guiding action of the guide stirring edges 13m and 13h formed projecting on the inner peripheral surface, so that it is efficiently pushed out to the pump chamber 2 side, and the inside of the annular gap 8 In addition to preventing foreign matter and precipitates in the liquid from adhering to and depositing on the inner periphery of the stationary sealing ring 6 and the shaft through-hole 4, the solid precipitate itself is not cooled. By preventing the compost Is not that cause a startup failure of the pump according to equal. In addition to the downstream action, a centripetal force from the inner peripheral surface of the rotary seal ring 9 toward the outer peripheral surface of the shaft guide lower portion 7 is applied to the swirl stirring edge 13s. In the outside-type shaft seal device of the present invention that seals from the inner periphery to the outer periphery between the sliding contact surfaces, the centripetal force is in a direction that prevents intrusion of liquid containing foreign matter to be sealed on the sliding surface. Because it acts, it functions extremely effectively in the sealing performance, so there is no surface roughening or surface opening due to the inclusion of precipitates between the sliding contact surfaces or foreign matter in the liquid, and stable sealing performance is achieved. The shaft is not abnormally worn against a liquid that is held and contains foreign matters such as sand and slurry, and the incidental member such as the bellows 10 is not damaged when the rotary seal ring 9 is assembled. Furthermore, the sliding heat generation of the sliding contact surface between the rotary sealing ring 9 and the fixed sealing ring 6 causes the low temperature side pump by the heat conduction action of the contact surface between the back end surface of the fixed sealing ring 6 and the bottom surface of the annular groove 5. By causing the liquid in the chamber 2 to absorb heat, a more efficient cooling action can be exhibited.
ポンプに装着された本発明軸封装置の要部縦断側面図である。It is a principal part vertical side view of the shaft seal apparatus of this invention with which the pump was mounted | worn. 本発明軸封装置における回転密封環の縦断側面図である。It is a vertical side view of the rotary seal ring in the shaft seal device of the present invention. 本発明軸封装置における固定密封環の縦断側面図である。It is a vertical side view of the fixed sealing ring in the shaft seal device of the present invention. 本発明軸封装置における固定密封環支承用のハウジングの縦断側面図である。It is a vertical side view of the housing for fixed seal ring support in the shaft seal device of the present invention. 図4のハウジングに図3の固定密封環を嵌着させた状態を示す縦断側面図である。FIG. 5 is a longitudinal side view showing a state in which the fixed sealing ring of FIG. 3 is fitted to the housing of FIG. 4.
符号の説明Explanation of symbols
1 固定密封環支承用のハウジング
4 シャフト貫通孔
5 環溝
6 固定密封環
7 シャフト導下部
8 環状間隙
9 回転密封環
10 ベローズ
11 リテーナ
13h シャフト貫通孔内周面の誘導撹拌縁
13m 固定密封環内周面の誘導撹拌縁
13s 旋回撹拌縁
DESCRIPTION OF SYMBOLS 1 Housing for fixed seal ring bearing 4 Shaft through-hole 5 Ring groove 6 Fixed seal ring 7 Shaft guide lower part 8 Annular gap 9 Rotating seal ring 10 Bellows 11 Retainer 13h Guide stirring edge 13m of shaft through-hole inner peripheral surface In fixed seal ring Induction stirring edge 13s on the peripheral surface

Claims (2)

  1. シャフト貫通孔の上端外側に環溝を凹設して固定密封環支承用のハウジングを構成し、軸封装置の固定密封環を上記環溝内へ該固定密封環の背端面と該環溝の底面とを当接するように嵌着させ、原動機のシャフト導下部を上記固定密封環およびシャフト貫通孔に遊嵌させ、該固定密封環の直上においてシャフト導下部に遊嵌される回転密封環は、リテーナにより結合されたベローズがシャフト導下部に嵌着されることによってシャフトと共に回転されて、コイルスプリングのバネ付勢により固定密封環と摺接し、上記回転密封環と固定密封環およびシャフト貫通孔の各内周とシャフト導下部の外周に環状間隙を保有させ、上記固定密封環内周径を回転密封環内周と同径もしくは若干大径に形成し、該固定密封環内周面より内方にシャフトの回転方向に従って旋回前面側を下り勾配に導延される旋回撹拌縁を上記環状間隙に面する回転密封環の内周面に突設形成させると共に、上記シャフト貫通孔内周径を固定密封環内周と同径もしくは若干大径に形成し、該シャフト貫通孔内周面より内方にシャフトの回転方向に向かって対向面側を下り勾配に導延される誘導撹拌縁を、上記環状間隙に面する上記旋回撹拌縁の下方の固定密封環またはシャフト貫通孔の何れか一方の内周面に突設形成させたことを特徴とする軸封装置。 An annular groove is recessed outside the upper end of the shaft through-hole to constitute a housing for fixed sealing ring support, and the fixed sealing ring of the shaft seal device is inserted into the annular groove and the back end surface of the fixed sealing ring and the ring groove A rotary seal ring that is fitted so as to abut the bottom surface, loosely engages the shaft guide lower part of the prime mover with the fixed seal ring and the shaft through hole, and is loosely fitted to the shaft guide lower part directly above the fixed seal ring, The bellows coupled by the retainer is rotated together with the shaft by being fitted to the shaft guide lower part, and is brought into sliding contact with the fixed sealing ring by the spring bias of the coil spring, and the rotation sealing ring, the fixed sealing ring, and the shaft through-hole are Each inner circumference and the outer circumference of the shaft guide lower part have an annular gap, and the inner diameter of the fixed sealing ring is formed to be the same diameter or slightly larger than the inner circumference of the rotary sealing ring. On shaft turn According to the direction, the swirl stirrer edge that extends down the swivel front side is formed on the inner peripheral surface of the rotary seal ring facing the annular gap, and the inner diameter of the shaft through hole is set to the inner diameter of the fixed seal ring. The guide stirring edge that is formed in the same or slightly larger diameter than the inner peripheral surface of the shaft through-hole and that extends in a downward slope toward the rotation direction of the shaft inward from the inner peripheral surface of the shaft through hole faces the annular gap. A shaft seal device, wherein the shaft seal device is formed to project on the inner peripheral surface of either the fixed seal ring or the shaft through hole below the swirl stirring edge.
  2. シャフト貫通孔の上端外側に環溝を凹設して固定密封環支承用のハウジングを構成し、軸封装置の固定密封環を上記環溝内へ該固定密封環の背端面と該環溝の底面とを当接するように嵌着させ、原動機のシャフト導下部を上記固定密封環およびシャフト貫通孔に遊嵌させ、上記固定密封環の直上においてシャフト導下部に遊嵌される回転密封環は、リテーナにより結合されたベローズがシャフト導下部に嵌着されることによってシャフトと共に回転されて、コイルスプリングのバネ付勢により固定密封環と摺接し、上記回転密封環と固定密封環およびシャフト貫通孔の各内周とシャフト導下部の外周に環状間隙を保有させ、上記固定密封環内周径を回転密封環内周と同径もしくは若干大径に形成し、該固定密封環内周面より内方にシャフトの回転方向に従って旋回前面側を下り勾配に導延される旋回撹拌縁を上記環状間隙に面する回転密封環の内周面に突設形成させると共に、上記シャフト貫通孔内周径を固定密封環内周と同径もしくは若干大径に形成し、該シャフト貫通孔内周面より内方にシャフトの回転方向に向かって対向面側を下り勾配に導延される誘導撹拌縁を、上記環状間隙に面する上記旋回撹拌縁の下方の固定密封環およびシャフト貫通孔の両内周面に突設形成させたことを特徴とする軸封装置。 An annular groove is recessed outside the upper end of the shaft through-hole to constitute a housing for fixed sealing ring support, and the fixed sealing ring of the shaft seal device is inserted into the annular groove and the back end surface of the fixed sealing ring and the ring groove A rotary seal ring that is fitted so as to abut the bottom surface, loosely engages the shaft guide lower part of the prime mover with the fixed seal ring and the shaft through hole, and is loosely fitted to the shaft guide lower part directly above the fixed seal ring, The bellows coupled by the retainer is rotated together with the shaft by being fitted to the shaft guide lower portion, and is brought into sliding contact with the fixed sealing ring by the spring bias of the coil spring, and the rotation sealing ring, the fixed sealing ring, and the shaft through-hole are Each inner circumference and the outer circumference of the shaft guide lower part have an annular gap, and the inner diameter of the fixed sealing ring is formed to be the same diameter or slightly larger than the inner circumference of the rotary sealing ring. On the shaft A swirl stirrer edge that is guided downwardly on the swivel front side according to the rolling direction protrudes from the inner peripheral surface of the rotary seal ring facing the annular gap, and the inner diameter of the shaft through hole is set in the fixed seal ring. An induction stirring edge that is formed to have the same diameter as the circumference or slightly larger in diameter and that extends inward from the inner circumferential surface of the shaft through-hole toward the rotation direction of the shaft in a downward gradient is formed in the annular gap. A shaft seal device, wherein the fixed seal ring below the swirl stirring edge facing and the inner peripheral surfaces of the shaft through holes are formed to project.
JP2008177839A 2008-07-08 2008-07-08 Shaft sealing device Pending JP2010019083A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2360558A2 (en) 2010-01-29 2011-08-24 Sony Corporation Information processing apparatus and information processing method for position control of an object displayed on a screen
CN102644579A (en) * 2012-04-27 2012-08-22 大连华阳光大密封有限公司 Mechanical seal for crankshaft device of compressor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004132425A (en) * 2002-10-09 2004-04-30 Tsurumi Mfg Co Ltd Shaft sealing device
JP2004132424A (en) * 2002-10-09 2004-04-30 Tsurumi Mfg Co Ltd Shaft sealing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004132425A (en) * 2002-10-09 2004-04-30 Tsurumi Mfg Co Ltd Shaft sealing device
JP2004132424A (en) * 2002-10-09 2004-04-30 Tsurumi Mfg Co Ltd Shaft sealing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2360558A2 (en) 2010-01-29 2011-08-24 Sony Corporation Information processing apparatus and information processing method for position control of an object displayed on a screen
CN102644579A (en) * 2012-04-27 2012-08-22 大连华阳光大密封有限公司 Mechanical seal for crankshaft device of compressor

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