JP3897013B2 - Water pump device - Google Patents

Water pump device Download PDF

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JP3897013B2
JP3897013B2 JP2003345110A JP2003345110A JP3897013B2 JP 3897013 B2 JP3897013 B2 JP 3897013B2 JP 2003345110 A JP2003345110 A JP 2003345110A JP 2003345110 A JP2003345110 A JP 2003345110A JP 3897013 B2 JP3897013 B2 JP 3897013B2
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Prior art keywords
ring
shaft
lip
side seal
outer ring
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JP2004108372A (en
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伸彦 三宅
繁 岩切
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7859—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element
    • F16C33/7866—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

本発明は、自動車の水冷エンジン等に好適なウォータポンプ用軸受シール装置、軸受およびウォータポンプ、詳しくは、ウォータポンプ回転軸を支持する軸受内に水、水蒸気などが侵入するのを防止し、同時に軸受内のグリースの流出を防止するウォータポンプ用軸受シール装置、ウォータポンプ用軸受およびウォータポンプに関するものである。   The present invention relates to a bearing seal device for a water pump suitable for a water-cooled engine of an automobile, a bearing and a water pump. More specifically, the present invention prevents water, water vapor, etc. from entering a bearing that supports a water pump rotating shaft, and at the same time. The present invention relates to a bearing seal device for a water pump, a bearing for a water pump, and a water pump that prevent the grease from flowing out in the bearing.

エンジンの冷却水を圧送するウォータポンプは一般に、インペラが固定された回転軸を、軸方向に間隔を置いて配した複数個のベアリング（転がり軸受）によりケーシングに支承して形成され、通常のポンプと同様に上記軸受内への冷却水の侵入を防止するため、軸受はシール付き密封軸受となっている。   A water pump that pumps engine cooling water is generally formed by supporting a rotating shaft, on which an impeller is fixed, on a casing by a plurality of bearings (rolling bearings) arranged at intervals in the axial direction. Similarly to the above, in order to prevent cooling water from entering the bearing, the bearing is a sealed bearing with a seal.

ところがエンジンにおいては運転、停止が繰り返されるため、上記シール付き密封軸受は加熱、冷却されて膨張、収縮を繰り返し、シール機能を損ないやすくなっている。   However, since the engine is repeatedly operated and stopped, the sealed bearing with a seal is heated and cooled to repeatedly expand and contract, and the sealing function is easily lost.

特にエンジン運転時にエンジン冷却水が加熱されることによって発生した水蒸気は、シール装置を通過して軸受内に侵入しやすくなる。
ポンプ回転軸を支持する軸受内には通常、軸受を潤滑するグリース等の潤滑剤が収納されているが、上述のようにして軸受内に冷却水、水蒸気が侵入すると特にこの潤滑剤の潤滑性能、耐久性が劣下して潤滑不良をきたしポンプ回転軸の回転抵抗の増大や焼付き等を招く危険がある。 In particular, water vapor generated by heating engine cooling water during engine operation easily passes through the seal device and enters the bearing.
The bearing that supports the pump rotating shaft usually contains a lubricant such as grease that lubricates the bearing. However, when cooling water or water vapor enters the bearing as described above, the lubrication performance of this lubricant is particularly important. In addition, the durability is inferior, resulting in poor lubrication, and there is a risk of increasing the rotational resistance of the pump rotating shaft and causing seizure.

そこで、従来の軸受シール装置を見てみると、例えば実開昭６２−６６０２６号公報記載のものが知られており、該公報の第２図、第３図および第４図に開示されているように、軸受は外周部が外輪端部に固定され、内周部に形成された複数のラジアルリップが軸の外周面と摺接する構造のシール体によってシールされている（特許文献１参照）。
しかし、この種の従来技術にあっては、内周部に形成されたラジアルリップのみによってシールされているため、エンジン運転時にエンジン冷却水が加熱されることによって発生した水蒸気が軸受内に侵入しやすい。 Therefore, when looking at a conventional bearing seal device, for example, one disclosed in Japanese Utility Model Publication No. 62-66026 is known, and is disclosed in FIGS. 2, 3 and 4 of the publication. As described above, the outer peripheral portion of the bearing is fixed to the outer ring end portion, and a plurality of radial lips formed on the inner peripheral portion are sealed by a seal body that is in sliding contact with the outer peripheral surface of the shaft (see Patent Document 1).
However, since this type of prior art is sealed only by a radial lip formed on the inner periphery, water vapor generated by heating engine cooling water during engine operation enters the bearing. Cheap.

さらに従来技術として、実開昭６１−１１２１１９号に記載のものも知られている（特許文献２参照）。
しかし、実開昭６１−１１２１１９号に開示のシール装置は、回転体に嵌合固定された円筒部と、これよりも外径側に延びた中間部と、これに続き軸方向に延びた大径円筒部とから構成されるスリーブと、該スリーブの円筒部外周に接する外向きリップと、スリーブの大径円筒部の内周に摺接する内向きリップとから構成されるシール体からなるものである。
しかしながら、該従来技術は、３重シール構造ではなく軸受内のグリースの流出を防止することは不十分であった。
実開昭６２− ６６０２６号公報 実開昭６１−１１２１１９号公報 Further, a conventional technique disclosed in Japanese Utility Model Laid-Open No. 61-112119 is also known (see Patent Document 2).
However, the sealing device disclosed in Japanese Utility Model Laid-Open No. 61-112119 includes a cylindrical portion fitted and fixed to a rotating body, an intermediate portion extending outward from the cylindrical portion, and a large portion extending in the axial direction. A seal body composed of a sleeve composed of a cylindrical portion with a diameter, an outward lip in contact with the outer periphery of the cylindrical portion of the sleeve, and an inward lip in sliding contact with the inner periphery of the large diameter cylindrical portion of the sleeve. is there.
However, the prior art is not a triple seal structure and is insufficient to prevent the grease from flowing out in the bearing.
Japanese Utility Model Publication No. 62-66026 Japanese Utility Model Publication No. 61-112119

本発明は、従来技術の有するこのような問題点に鑑みなされたものであり、その目的とするところは、軸受内部に侵入しようとする冷却水や水蒸気などをほぼ確実に防止し、同時に軸受内のグリースの流出を防止するウォータポンプ用軸受シール装置、ウォータポンプ用軸受およびウォータポンプを提供することである。   The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to almost certainly prevent cooling water, water vapor and the like from entering the inside of the bearing, and at the same time, in the bearing. It is intended to provide a bearing seal device for a water pump, a bearing for a water pump, and a water pump that prevent the grease from flowing out.

上記課題を解決するための技術的手段は次の通りである。
第１の発明は、ケーシングに固定された外輪と、一端側にプーリを備え、他端側にインペラを備えた軸体との間に複数列の転動体を有し、かつ前記外輪の両端部に固定されたシール環によって軸体との間をシールしてなるウォータポンプ用軸受シール装置において、前記シール環のうち、インペラ側のシール環は、補強環とゴム、合成樹脂などの弾性体で形成したリップを備えた外輪側シール環と、ゴム、合成樹脂などの弾性体で形成したリップを有し、軸体に嵌合固定された軸側シール環よりなり、前記外輪側シール環のリップが軸体の外周面と接し、前記軸側シール環のリップが前記外輪の端部の内周面と接していることを特徴とするウォータポンプ用軸受シール装置としたことである。
また、第２の発明は、ケーシングに固定された外輪と、一端側にプーリを備え、他端側にインペラを備えた回転する軸体と、上記外輪と軸体との間に配される複数列の転動体と、補強環とゴム、合成樹脂などの弾性体で形成したリップを備えた外輪側シール環およびゴム、合成樹脂などの弾性体で形成したリップを有し、軸体に嵌合固定された軸側シール環とからなるインペラ側のシール装置とによって構成され、前記外輪側シール環のリップが軸体の外周面と接し、前記軸側シール環のリップが前記外輪の端部の内周面と接していることを特徴とするウォータポンプ用軸受としたことである。
さらに、第３の発明は、自動車の水冷用ウォータポンプとして、端部にインペラを有し、ケーシングに固定された上記第２の発明のウォータポンプ用軸受を使用したことである。 The technical means for solving the above problems are as follows.
A first invention includes a plurality of rolling elements between an outer ring fixed to a casing and a shaft body having a pulley on one end side and an impeller on the other end side, and both end portions of the outer ring. In the bearing seal device for a water pump in which the shaft ring is sealed with a seal ring fixed to the seal ring, the impeller side seal ring of the seal rings is a reinforcement ring and an elastic body such as rubber or synthetic resin. The outer ring side seal ring having a formed lip and a lip formed of an elastic body such as rubber or synthetic resin, and comprising a shaft side seal ring fitted and fixed to the shaft body, the lip of the outer ring side seal ring Is in contact with the outer peripheral surface of the shaft body, and the lip of the shaft-side seal ring is in contact with the inner peripheral surface of the end portion of the outer ring.
Further, the second aspect of the invention includes an outer ring fixed to the casing, a rotating shaft body provided with a pulley on one end side and an impeller on the other end side, and a plurality arranged between the outer ring and the shaft body. It has a rolling element in a row, an outer ring side seal ring with a lip formed of an elastic body such as a reinforcing ring and rubber or synthetic resin, and a lip formed of an elastic body such as rubber or synthetic resin, and is fitted to a shaft body. An impeller side sealing device comprising a fixed shaft side seal ring, the lip of the outer ring side seal ring is in contact with the outer peripheral surface of the shaft body, and the lip of the shaft side seal ring is at the end of the outer ring . The water pump bearing is characterized by being in contact with the inner peripheral surface .
Further, the third invention is the use of the water pump bearing of the second invention having an impeller at an end and fixed to a casing as a water pump for water cooling of an automobile.

本発明の構成によれば、軸側シール環は、軸の回転と一緒に回転するため、メカニカルシールから漏れ出て、この軸側シール環のところまで来た冷却水は、軸側シール環の遠心力で外径方向に飛ばされる。
このように遠心力で外径方向に飛ばされた冷却水は、ケーシングの内周に当たり、その一部が軸受シール装置方向に跳ね返ってくることが多分にあり、この時、外輪と軸側シール環との間に何等シール部が存していないと、跳ね返ってきた冷却水の一部が内側のシール部（特許請求の範囲の請求項でいう外輪側シール）に入ってきてしまい、シール性が悪くなる可能性がある。
しかし、本発明によれば、軸側シール環に外輪と接するリップを有するため、ケーシングの内周に当たり跳ね返ってきた冷却水は、前記外輪と接するリップによって内側のシール部へと入ってくることが防がれる。 According to the configuration of the present invention, since the shaft-side seal ring rotates together with the rotation of the shaft, the coolant leaking out from the mechanical seal and reaching the shaft-side seal ring is transferred to the shaft-side seal ring. It is blown in the outer diameter direction by centrifugal force.
The cooling water blown in the outer diameter direction by the centrifugal force hits the inner periphery of the casing, and a part of the cooling water is likely to bounce back toward the bearing seal device. At this time, the outer ring and the shaft-side seal ring If there is no seal part between them, a part of the cooling water that has bounced back enters the inner seal part (outer ring side seal in the claims of the claims), and the sealing performance is It can get worse.
However, according to the present invention, the shaft-side seal ring has the lip that comes into contact with the outer ring, so that the cooling water that has bounced back against the inner periphery of the casing may enter the inner seal portion by the lip that comes into contact with the outer ring. It is prevented.

本発明によれば、軸側シール環は、軸の回転と一緒に回転するため、メカニカルシールから漏れ出て、この軸側シール環のところまで来た冷却水は、軸側シール環の遠心力で外径方向に飛ばされる。
このように遠心力で外径方向に飛ばされた冷却水は、ケーシングの内周に当たり、その一部が軸受シール装置方向に跳ね返ってくることが多分にあるが、軸側シール環に外輪と接するリップを有するため、ケーシングの内周に当たり跳ね返ってきた冷却水は、前記外輪と接するリップによって内側のシール部へと入ってくることが防がれるため、シール性が向上する。
従って、軸受内部に侵入しようとする冷却水や水蒸気などをほぼ確実に防止し、同時に軸受内のグリースの流出を防止するウォータポンプ用軸受シール装置、ウォータポンプ用軸受およびウォータポンプを提供できる。 According to the present invention, since the shaft-side seal ring rotates together with the rotation of the shaft, the cooling water leaking from the mechanical seal and reaching the shaft-side seal ring is subjected to centrifugal force of the shaft-side seal ring. Is blown in the outer diameter direction.
The cooling water blown in the outer diameter direction by the centrifugal force hits the inner periphery of the casing, and a part of the cooling water is likely to rebound toward the bearing seal device, but the shaft-side seal ring contacts the outer ring. Since the lip is provided, the cooling water that has bounced back against the inner periphery of the casing is prevented from entering the inner seal portion by the lip in contact with the outer ring, so that the sealing performance is improved.
Accordingly, it is possible to provide a water pump bearing seal device, a water pump bearing, and a water pump that almost certainly prevent cooling water, water vapor, and the like from entering the inside of the bearing, and at the same time, prevent the grease from flowing out of the bearing.

以下図に基づいて本発明の技術的手段の一実施例を説明する。   An embodiment of technical means of the present invention will be described below with reference to the drawings.

図１は本発明装置を組込んだウォータポンプの一例を示す要部縦断面図、図２は図１の要部拡大断面図である。   FIG. 1 is a longitudinal sectional view of an essential part showing an example of a water pump incorporating the device of the present invention, and FIG. 2 is an enlarged sectional view of an essential part of FIG.

10はウォータポンプ用転がり軸受の全体を表す。
101 は転がり軸受10の外輪で、該外輪101 はケーシング11の内周面に固定され、該外輪101 の内周面には複数列の軌道溝1011が形成されると共にその両端部にシール溝1012が形成されている。 10 represents the entire rolling bearing for the water pump.
101 is an outer ring of the rolling bearing 10, and the outer ring 101 is fixed to the inner peripheral surface of the casing 11. A plurality of rows of raceway grooves 1011 are formed on the inner peripheral surface of the outer ring 101, and seal grooves 1012 are formed at both ends thereof. Is formed.

12は前記外輪101 内に複数列の転動体13を介して嵌挿された軸体で、該軸体12の一端側にはプーリ130 を備え、他端側にはインペラ14を備えている（図１参照）。
121 は外輪101の軌道溝1011と対向して軸体12の外周面に形成された軌道溝である。 A shaft body 12 is inserted into the outer ring 101 via a plurality of rows of rolling elements 13, and includes a pulley 130 on one end side of the shaft body 12 and an impeller 14 on the other end side ( (See FIG. 1).
Reference numeral 121 denotes a raceway groove formed on the outer peripheral surface of the shaft body 12 so as to face the raceway groove 1011 of the outer ring 101.

15は前記外輪101 のインペラ14側のシール溝1012に固定された外輪側シール環151と軸側シール環152からなるシール装置で、該シール装置15の外輪側シール環151は補強環1511とゴム、合成樹脂などの弾性体でもって形成された少なくとも軸方向内向きの第１副リップ1512と軸方向外向きの主リップ1513と該主リップ1513よりも外径側に位置して軸方向外側に延びた第２副リップ1514とから構成されてなる。
また、補強環1511は、一端部1511aを外輪101に固定され、円筒状に形成された中間部1511bを介して他端部1511cが軸体側に延びている（図２参照）。 15 is a seal device comprising an outer ring side seal ring 151 and a shaft side seal ring 152 fixed to a seal groove 1012 on the impeller 14 side of the outer ring 101. The outer ring side seal ring 151 of the seal device 15 is composed of a reinforcing ring 1511 and rubber. , At least an axially inward first sub lip 1512 formed of an elastic body such as a synthetic resin, an axially outward main lip 1513, and an axially outwardly located outer side of the main lip 1513 The second sub lip 1514 extends.
The reinforcing ring 1511 has one end portion 1511a fixed to the outer ring 101, and the other end portion 1511c extending to the shaft body side via a cylindrical intermediate portion 1511b (see FIG. 2).

次に、前記軸側シール環152は耐腐蝕性にとむ特殊鋼板例えばステンレス鋼板を用いて成形されたもので、その形状は断面ほぼコ字状にして前記軸体12に緊密嵌合固定される円筒部（以下第１円筒部ともいう。各実施例においても同じ。）1521とこれよりも外径側に延びた中間部1522とこれに続き軸方向内側に延びた第２円筒部1523とから構成されてなる。尚、本実施例においては、この中間部1522と第２円筒部1523により外径方向部分を構成する。この外径方向部分の構成は本実施例に限定されない。また、以下各実施例においても同じである。
第２円筒部1523は、外周縁部1823の周囲にゴム、合成樹脂等の弾性体を備えて形成され、その周縁部にリップが形成されている。 Next, the shaft-side seal ring 152 is formed using a special steel plate that is resistant to corrosion, such as a stainless steel plate. The shape of the shaft-side seal ring 152 is a substantially U-shaped cross section and is tightly fitted and fixed to the shaft body 12. A cylindrical portion (hereinafter also referred to as a first cylindrical portion; the same applies to each embodiment) 1521, an intermediate portion 1522 extending outward from the intermediate portion 1522, and a second cylindrical portion 1523 extending inward in the axial direction. Consists of. In this embodiment, the intermediate portion 1522 and the second cylindrical portion 1523 constitute an outer diameter direction portion. The configuration of the outer diameter direction portion is not limited to the present embodiment. The same applies to the following embodiments.
The second cylindrical portion 1523 is formed with an elastic body such as rubber or synthetic resin around the outer peripheral edge 1823, and a lip is formed on the peripheral edge.

前記外輪側シール環151の前記第１副リップ1512が軸方向内向きに設けられて軸体12の外周面122と接触し、主リップ1513が軸方向外向きに設けられて前記軸側シール環152の第１円筒部1521の外周面1524と接してシール部を形成し、また前記第２円筒部1523は前記第２副リップ1514の外方傾斜面1816とこれに対応する内方傾斜面1826のすきまＣ6 によりラビリンスシールが形成される。
そして、前記第２円筒部1523はその周縁部のリップが外輪101 の端部1013の内周面1014に接触して接触型シール部1825が形成される。 The first sub lip 1512 of the outer ring side seal ring 151 is provided inward in the axial direction to contact the outer peripheral surface 122 of the shaft body 12, and the main lip 1513 is provided in the axial direction outward to provide the shaft side seal ring. A seal portion is formed in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521, and the second cylindrical portion 1523 has an outer inclined surface 1816 of the second auxiliary lip 1514 and a corresponding inner inclined surface 1826. A labyrinth seal is formed by the clearance C6.
Then, the lip of the peripheral edge of the second cylindrical portion 1523 comes into contact with the inner peripheral surface 1014 of the end portion 1013 of the outer ring 101 to form a contact-type seal portion 1825.

本実施例において、外輪側シール環151の第１副リップ1512は軸方向内向きに設けられて軸体12の外周面122に接触していることにより軸受内のグリースが洩れるのを防ぐと共に、主リップ1513が軸側シール環152の第１円筒部1521の外周面1524と接することにより外部からの異物の侵入を防止する中間シールの役目をなしシール部が形成される。
尚、本実施例においては第１副リップ1512は軸体12の外周面122 に接触していることにより、軸側シール環152と軸体12とのはめあい面から軸受内のグリースが洩れるのを防ぐのにも効果的である。 In the present embodiment, the first sub lip 1512 of the outer ring side seal ring 151 is provided inward in the axial direction and is in contact with the outer peripheral surface 122 of the shaft body 12, thereby preventing leakage of grease in the bearing, When the main lip 1513 is in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521 of the shaft side seal ring 152, the main lip 1513 serves as an intermediate seal that prevents foreign substances from entering from outside, thereby forming a seal portion.
In this embodiment, since the first sub lip 1512 is in contact with the outer peripheral surface 122 of the shaft body 12, grease in the bearing leaks from the fitting surface between the shaft-side seal ring 152 and the shaft body 12. It is also effective to prevent.

また、外輪側シール環151の第２副リップ1514が軸側シール環152の第２円筒部1523の内周面に非接触により外部シールの役目をなすシール部が形成され、また該シール部は、軸側シール環152の中間部1522と第２円筒部1523との協働作用により軸受側に侵入しようとする冷却水、水蒸気を振り切ることができる。   Further, the second sub lip 1514 of the outer ring side seal ring 151 is not contacted with the inner peripheral surface of the second cylindrical portion 1523 of the shaft side seal ring 152 to form a seal portion that functions as an external seal. The cooling water and water vapor that are about to enter the bearing side can be shaken off by the cooperative action of the intermediate portion 1522 of the shaft-side seal ring 152 and the second cylindrical portion 1523.

要するに、本発明の軸受シール装置は、第１副リップ1512が軸体12の外周面122と接触によるシール部、また主リップ1513が第１円筒部1521の外周面1524と接触によるシール部、さらに第２副リップ1514が第２円筒部1523の内周面との間で非接触によるシール部の三重構造が形成される。   In short, in the bearing seal device of the present invention, the first sub lip 1512 is in contact with the outer peripheral surface 122 of the shaft body 12 and the main lip 1513 is in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521. A triple structure of a non-contact seal portion is formed between the second sub lip 1514 and the inner peripheral surface of the second cylindrical portion 1523.

また、外輪側シール環151 の補強環1511は、一端部1511a が外輪101 に固定され、円筒状に形成された中間部1511b を介して、他端部1511c が軸体側に延びているので、他端部1511c は一端部1511a より軸方向外側に位置し、他端部1511c は第１副リップ1512を補強している。
このため、第１副リップ1512 は軸体12の外周面122 と緊迫力をもって摺接することができ、ガータスプリング等を使用する必要がない。 Further, the reinforcing ring 1511 of the outer ring side seal ring 151 has one end portion 1511a fixed to the outer ring 101, and the other end portion 1511c extending to the shaft body side via an intermediate portion 1511b formed in a cylindrical shape. The end portion 1511c is positioned on the axially outer side from the one end portion 1511a, and the other end portion 1511c reinforces the first sub lip 1512.
Therefore, the first auxiliary lip 1512 can be brought into sliding contact with the outer peripheral surface 122 of the shaft body 12 with a tight force, and it is not necessary to use a garter spring or the like.

図３は本発明の実施例２を示す要部拡大断面図で、前記実施例１と異なる点は、軸側シール環152 の第２円筒部1523の外周縁部を半径方向外方に延ばしたフランジ部1527の周囲にゴム、合成樹脂などの弾性体よりなる半径方向外向きの接触型シール部1528を設けたところにある。
該接触型シール部1528はそのリップが外輪101 の端部1013の内周面1014に接触してシールが形成される。
また、外輪側シール環151の第２副リップ1514が、軸側シール環152 の第２円筒部1523の内周面1525との間で接触のシール部を形成する。
また、外輪側シール環151の第２副リップ1514が軸側シール環152の第２円筒部1523の内周面に接触により外部シールの役目をなすシール部が形成され、また該シール部は、軸側シール環152の中間部1522と第２円筒部1523との協働作用により軸受側に侵入しようとする冷却水、水蒸気を振り切ることができる。 FIG. 3 is an enlarged cross-sectional view of the main part showing Embodiment 2 of the present invention. The difference from Embodiment 1 is that the outer peripheral edge of the second cylindrical portion 1523 of the shaft-side seal ring 152 is extended radially outward. A radially outward contact-type seal portion 1528 made of an elastic body such as rubber or synthetic resin is provided around the flange portion 1527.
The lip of the contact-type seal portion 1528 comes into contact with the inner peripheral surface 1014 of the end portion 1013 of the outer ring 101 to form a seal.
Further, the second sub lip 1514 of the outer ring side seal ring 151 forms a seal part in contact with the inner peripheral surface 1525 of the second cylindrical part 1523 of the shaft side seal ring 152.
Further, the second sub lip 1514 of the outer ring side seal ring 151 is brought into contact with the inner peripheral surface of the second cylindrical portion 1523 of the shaft side seal ring 152 to form a seal portion that functions as an external seal. Cooling water and water vapor that are about to enter the bearing side can be shaken off by the cooperative action of the intermediate portion 1522 of the shaft-side seal ring 152 and the second cylindrical portion 1523 .

本発明装置を組込んだウォータポンプの要部断面図である。It is principal part sectional drawing of the water pump incorporating the apparatus of this invention. 図１の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 本発明の実施例２を示す要部拡大断面図である。 It is a principal part expanded sectional view which shows Example 2 of this invention .

符号の説明Explanation of symbols

101 ：外輪
11：ケーシング
12：軸体
13：転動体
130 ：プーリ
14：インペラ
15：シール装置
151：外輪側シール環
1511：補強環
1512：第１副リップ
1514：第２副リップ
1513：主リップ
152：軸側シール環
1521：第１円筒部
1522：中間部
1523：第２円筒部 101: Outer ring
11: Casing
12: Shaft
13: Rolling element
130: pulley
14: Impeller
15: Sealing device
151: Outer ring side seal ring
1511: Reinforcement ring
1512: First secondary lip
1514: Second secondary lip
1513: Main lip
152: Shaft side seal ring
1521: First cylindrical part
1522: Intermediate part
1523: Second cylindrical part

Claims (3)

ケーシングに固定された外輪と、一端側にプーリを備え、他端側にインペラを備えた軸体との間に複数列の転動体を有し、かつ前記外輪の両端部に固定されたシール環によって軸体との間をシールしてなるウォータポンプ用軸受シール装置において、前記シール環のうち、インペラ側のシール環は、補強環とゴム、合成樹脂などの弾性体で形成したリップを備えた外輪側シール環と、ゴム、合成樹脂などの弾性体で形成したリップを有し、軸体に嵌合固定された軸側シール環よりなり、前記外輪側シール環のリップが軸体の外周面と接し、前記軸側シール環のリップが前記外輪の端部の内周面と接していることを特徴とするウォータポンプ用軸受シール装置。 A seal ring having a plurality of rolling elements between an outer ring fixed to the casing and a shaft body having a pulley on one end and an impeller on the other end, and fixed to both ends of the outer ring In the bearing seal device for a water pump in which the space between the shaft body is sealed by the impeller, the impeller side seal ring includes a reinforcing ring and a lip formed of an elastic body such as rubber or synthetic resin. The outer ring side seal ring has a lip formed of an elastic body such as rubber or synthetic resin, and includes a shaft side seal ring fitted and fixed to the shaft body. The lip of the outer ring side seal ring is an outer peripheral surface of the shaft body. A bearing seal device for a water pump, wherein the lip of the shaft-side seal ring is in contact with the inner peripheral surface of the end of the outer ring. ケーシングに固定された外輪と、一端側にプーリを備え、他端側にインペラを備えた回転する軸体と、上記外輪と軸体との間に配される複数列の転動体と、補強環とゴム、合成樹脂などの弾性体で形成したリップを備えた外輪側シール環およびゴム、合成樹脂などの弾性体で形成したリップを有し、軸体に嵌合固定された軸側シール環とからなるインペラ側のシール装置とによって構成され、前記外輪側シール環のリップが軸体の外周面と接し、前記軸側シール環のリップが前記外輪の端部の内周面と接していることを特徴とするウォータポンプ用軸受。 An outer ring fixed to the casing; a rotating shaft body provided with a pulley on one end side and an impeller on the other end side; a plurality of rows of rolling elements disposed between the outer ring and the shaft body; and a reinforcing ring And an outer ring side seal ring having a lip formed of an elastic body such as rubber and synthetic resin, and a shaft side seal ring fitted and fixed to the shaft body having a lip formed of an elastic body such as rubber and synthetic resin The lip of the outer ring side seal ring is in contact with the outer peripheral surface of the shaft body, and the lip of the shaft side seal ring is in contact with the inner peripheral surface of the end portion of the outer ring. A bearing for water pumps. 端部にインペラを有し、ケーシングに固定された請求項２に記載のウォータポンプ用軸受を使用したことを特徴とする自動車の水冷用ウォータポンプ。 The water pump for water cooling of a motor vehicle using the water pump bearing according to claim 2 which has an impeller at an end and is fixed to a casing.
JP2003345110A 2003-10-03 2003-10-03 Water pump device Expired - Fee Related JP3897013B2 (en)

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JP4952913B2 (en) * 2007-02-13 2012-06-13 Ｎｏｋ株式会社 Sealing device for water pump
JP6590293B2 (en) * 2014-10-14 2019-10-16 Nok株式会社 Sealing device
JP6953264B2 (en) * 2016-11-07 2021-10-27 株式会社ジェイテクト Sealed structure
DE102017125362A1 (en) * 2016-11-07 2018-05-09 Jtekt Corporation sealing structure

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