JP2004108372A - Water pump device - Google Patents

Water pump device Download PDF

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Publication number
JP2004108372A
JP2004108372A JP2003345110A JP2003345110A JP2004108372A JP 2004108372 A JP2004108372 A JP 2004108372A JP 2003345110 A JP2003345110 A JP 2003345110A JP 2003345110 A JP2003345110 A JP 2003345110A JP 2004108372 A JP2004108372 A JP 2004108372A
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Prior art keywords
shaft
lip
ring
seal ring
cylindrical portion
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JP2003345110A
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JP3897013B2 (en
Inventor
Nobuhiko Miyake
三宅　伸彦
Shigeru Iwakiri
岩切　繁
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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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing sealing device for a water pump almost surely preventing cooling water and steam from intruding into a bearing and grease in the bearing from flowing out. <P>SOLUTION: A seal ring in an impeller side consists of a reinforcement ring, an outer ring side seal ring provided with a first sub-lip and a main lip formed of elastic body such as rubber and synthetic resin, and a second sub-lip located in an outer diameter side of the main lip, an axial side seal ring including a first cylindrical part fitted and fixed on a shaft body, an intermediate part extending in an outer diameter side of the first cylindrical part, and a second cylindrical part connecting to the intermediate part and extending in an axial direction, and turning together with the shaft body. The main lip slidingly contacts an outer circumference surface of the first cylindrical part of a shaft side seal ring, the first sub-lip slidingly contacts an outer circumference surface of a rotary member in an axial direction inner side of the main lip, the second sub-lip slidingly contacts the shaft side seal ring in an outer diameter aide of the main lip, and a part extending outer diameter side of the shaft side seal ring constructs a labyrinth seal between an outer wheel side seal ring or an outer wheel. <P>COPYRIGHT: (C)2004,JPO

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 provides a water pump bearing seal device, a bearing and a water pump suitable for a water-cooled engine of an automobile, and more specifically, prevents water, steam, and the like 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 for preventing grease from flowing out of 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。　 Generally, a water pump for pumping engine cooling water is formed by supporting a rotating shaft to which an impeller is fixed on a casing by a plurality of bearings (rolling bearings) arranged at intervals in an axial direction. In order to prevent cooling water from entering the bearing, the bearing is a hermetically sealed bearing.

　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 operation of the engine is repeatedly started and stopped, the sealed bearing with the seal is repeatedly heated and cooled, and expands and contracts repeatedly, thereby easily impairing the sealing function.

　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, steam generated by heating the engine cooling water during operation of the engine easily passes through the seal device and enters the bearing.
Lubricants such as grease for lubricating the bearings are usually stored in the bearings that support the pump rotating shaft. However, when cooling water and water vapor enter the bearings as described above, the lubrication performance of these lubricants is particularly high. In addition, there is a danger that lubrication failure occurs due to inferior durability, resulting in an increase in rotational resistance of the pump rotating shaft, seizure and the like.

　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, looking at a conventional bearing seal device, for example, the one described in Japanese Utility Model Laid-Open No. 62-66026 is known, which is disclosed in FIG. 2, FIG. 3 and FIG. As described above, the outer periphery of the bearing is fixed to the end of the outer race, and the plurality of radial lips formed on the inner periphery are sealed by a seal body having a structure in which the outer periphery of the shaft is in sliding contact with the bearing (see Patent Document 1).
However, in this type of prior art, since the seal is provided only by the radial lip formed on the inner peripheral portion, steam generated by heating the engine cooling water during operation of the engine enters the bearing. Cheap.

　また、実開昭６０−１０７４５９号公報記載のものも知られているが、該従来技術は、複数のラジアル接触リップを有する外輪環と、該外輪環のシールリップと接触する金属で形成された内輪環とよりなり、外輪環の主シールリップを小径側に、補助シールリップを大径側にそれぞれ外方に突出させて設け、内輪環は外輪環より小径で、複数の軸方向部をもち、主シールリップ及び補助シールリップを内輪環のそれぞれの軸方向外周面に接触させる構造のものであり、補助シールリップは内輪環と４５゜の角度をもって接触している（特許文献２参照）。
しかし、この種の従来技術にあっては、主シールリップ及び補助シールリップの二重のシール構造により、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入り込むのを防止するのは効果的であるが、主シールリップは外方に向け突出しているために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。 Japanese Unexamined Utility Model Publication No. 60-107459 is also known, but in the prior art, an outer ring having a plurality of radial contact lips and a metal contacting a seal lip of the outer ring are provided. The outer ring has a main seal lip protruding outward on the small diameter side and an auxiliary seal lip protruding outward on the large diameter side.The inner ring has a smaller diameter than the outer ring and has a plurality of axial portions. The main seal lip and the auxiliary seal lip are configured to contact the respective outer peripheral surfaces in the axial direction of the inner ring, and the auxiliary seal lip contacts the inner ring at an angle of 45 ° (see Patent Document 2).
However, in this kind of conventional technology, the double sealing structure of the main seal lip and the auxiliary seal lip prevents the steam generated by heating the engine cooling water during the operation of the engine from entering the bearing. Although it is effective to do so, the main seal lip protrudes outwardly, so that it is insufficient to prevent grease from flowing out of the bearing.

　また、実開昭６１−１１２１１９号公報記載のものも知られているが、該従来技術は複数のシールリップを有する外輪環と、外輪環のシールリップと接触するコ字形に形成された内輪環の小径部外周に、また、内向リップを大径部内周にそれぞれ接触させる構造のものである。
しかしながら、この従来技術にあっては、外向リップは外方に向け突出しているために、軸受内のグリースの流出に防止することは不十分であった。 Japanese Unexamined Utility Model Publication No. 61-112119 is also known, but the prior art discloses an outer ring having a plurality of seal lips, and an inner ring formed in a U-shape which comes into contact with the seal lips of the outer ring. And the inward lip contacts the inner periphery of the large diameter portion.
However, in this prior art, since the outward lip projects outward, it is insufficient to prevent grease from flowing out of the bearing.

　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３参照）。
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６０−１０７４５９号公報 実開昭６１−１１２１１９号公報 Further, as a conventional technique, a technique described in Japanese Utility Model Laid-Open Publication No. 61-112119 is also known (see Patent Document 3).
However, the seal device disclosed in Japanese Utility Model Application Laid-Open No. 61-112119 has a cylindrical portion fitted and fixed to a rotating body, an intermediate portion extending outwardly from the cylindrical portion, and a large portion extending in the axial direction following the intermediate portion. And a seal body including an outer 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 but insufficient to prevent grease from flowing out of the bearing.
Japanese Utility Model Publication No. 62-66026 Japanese Utility Model Publication No. 60-107459 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。 SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to almost certainly prevent cooling water, water vapor, and the like from entering a bearing, A bearing seal device for a water pump, a bearing for a water pump, and a water pump which 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。
　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第１副リップと主リップと該主リップよりも外径側に位置して軸方向外側に延びた第２副リップとを備えた外輪側シール環と、軸体に嵌合固定された第１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第２円筒部とを有する軸側シール環よりなり、少なくとも前記主リップが軸側シール環の第１円筒部の外周面と接するか、もしくは軸体の外周面と接し、第２副リップが軸側シール環の第２円筒部との間で接触または非接触のシール部を形成していることである。
また、ウォータポンプ用軸受として、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第１副リップと主リップと、該主リップよりも外径側に位置して軸方向外側に延びた第２副リップとを備えた外輪側シール環および軸体に嵌合固定された第１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第２円筒部とを有する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、少なくとも前記主リップが軸側シール環の第１円筒部の外周面と接するか、もしくは軸体の外周面と接し、第２副リップが軸側シール環の第２円筒部との間で接触または非接触のシール部を形成していることである。
さらに、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記載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 seal ring having a plurality of rows of rolling elements between an outer ring fixed to a casing and a shaft 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, the seal ring on the impeller side of the seal ring is a first auxiliary lip formed of a reinforcing ring and an elastic body such as rubber or synthetic resin. An outer ring side seal ring including a main lip, a second sub lip located on an outer diameter side of the main lip and extending axially outward, a first cylindrical portion fitted and fixed to the shaft body, A shaft-side seal ring having an intermediate portion extending more outwardly than this and a second cylindrical portion subsequently extending in the axial direction, wherein at least the main lip of the first cylindrical portion of the shaft-side seal ring is formed. Contact the outer peripheral surface or the outer peripheral surface of the shaft, and There is that which forms the seal portion of the contact or non-contact between the second cylindrical portion of the shaft seal ring.
Further, as a water pump bearing, an outer ring fixed to a casing, a rotating shaft body having a pulley on one end side and an impeller on the other end side, and a plurality of shafts arranged between the outer ring and the shaft body A row of rolling elements, a reinforcing ring, a first sub lip and a main lip formed of an elastic body such as rubber or synthetic resin, and a second sub lip located on the outer diameter side of the main lip and extending outward in the axial direction. A first cylindrical portion fitted and fixed to the outer ring side seal ring and the shaft body having a lip, an intermediate portion extending outwardly from the first cylindrical portion, and a second cylindrical portion extending in the axial direction following the first cylindrical portion; And a shaft-side seal ring having an impeller-side seal device, wherein at least the main lip is in contact with the outer peripheral surface of the first cylindrical portion of the shaft-side seal ring, or is in contact with the outer peripheral surface of the shaft body, (2) The contact or non-contact between the secondary lip and the second cylindrical portion of the shaft side seal ring Is that which forms the seal portion of the touch.
Further, as the water pump for water cooling of an automobile, the above-described water pump bearing having an impeller at an end and fixed to a casing is used.

　本発明によれば、シール部を二重シール構造としたことにより軸方向スペースを増すことなく低トルクで、かつ強力なシール機能を如何なく発揮できる。
特に軸の回転に伴う軸側シール環のスリンガ作用と第２副リップとの相乗効果により更に有効に機能する。 According to the present invention, since the seal portion has a double seal structure, a low torque and strong sealing function can be exerted without increasing the axial space.
In particular, it functions more effectively due to the synergistic effect of the slinger action of the shaft side seal ring with the rotation of the shaft and the second sub lip.

また、軸側シール環の第２円筒部の先端と相手部材との間に接触または非接触のシール部を形成した場合には、そのシール効果により外部からの水、水蒸気などの異物の侵入防止に対し、更に有効に作用する。 When a contact portion or a non-contact seal portion is formed between the tip of the second cylindrical portion of the shaft side seal ring and the mating member, the sealing effect prevents foreign matters such as water and water vapor from entering from outside. To act more effectively.

　特に、主リップが軸側シール環の第１円筒部の外周面もしくは軸体の外周面と摺接することにより、外部からの異物の侵入を防止し、軸方向内向きに形成された第１副リップにより、軸受内のグリースが洩れるのを防止し、第２副リップが軸側シール環の第２円筒部との間で接触または非接触のシール部を形成することにより、軸受内に侵入しようとする冷却水、水蒸気を防止することができる。
従って、軸受寿命の著しい延長が図れることは勿論のこと、ウォータポンプ自体の信頼性を高めることのできるなど本発明特有の作用効果を奏するものである。 In particular, the main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft-side seal ring or the outer peripheral surface of the shaft body, thereby preventing foreign matter from entering from the outside, and forming the first auxiliary member formed inward in the axial direction. The lip prevents the grease in the bearing from leaking, and the second sub-lip forms a contact or non-contact seal portion with the second cylindrical portion of the shaft-side seal ring, so that the second sub-lip may enter the bearing. Cooling water and water vapor can be prevented.
Therefore, it is possible to remarkably prolong the life of the bearing, and to achieve the effects and advantages unique to the present invention, such as the improvement of the reliability of the water pump itself.

　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。 Hereinafter, an embodiment of the technical means of the present invention will be described 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。 Reference numeral 10 denotes the whole of the rolling bearing for the water pump.
Reference numeral 101 denotes an outer ring of the rolling bearing 10. The outer ring 101 is fixed to the inner peripheral surface of the casing 11, and 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。 Reference numeral 12 denotes a shaft fitted into the outer ring 101 via a plurality of rows of rolling elements 13. The shaft 12 has a pulley 130 at one end and an impeller 14 at the other end. (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）。 Reference numeral 15 denotes a sealing device including 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 has a reinforcing ring 1511 and rubber. A first auxiliary lip 1512 inward in the axial direction, a main lip 1513 in the axially outward direction, and an outer radial side of the main lip 1513 formed of an elastic body such as a synthetic resin. The second sub lip 1514 is extended.
The reinforcing ring 1511 has one end 1511a fixed to the outer ring 101, and the other end 1511c extending toward the shaft via an intermediate portion 1511b formed in a cylindrical shape (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第１円筒部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。 Next, the shaft-side seal ring 152 is formed by using a special steel plate having corrosion resistance, for example, a stainless steel plate, and has a substantially U-shaped cross section, and is tightly fitted and fixed to the shaft body 12. It is composed of a first cylindrical portion 1521, an intermediate portion 1522 extending outwardly from the first cylindrical portion 1521, and a second cylindrical portion 1523 subsequently extending inward in the axial direction.

　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、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。 The first sub lip 1512 of the outer ring side seal ring 151 is provided inward in the axial direction and contacts the outer peripheral surface 122 of the shaft body 12, and the main lip 1513 is provided in the outer side in the axial direction. 152, a seal portion is formed in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521, and the second auxiliary lip 1514 is in contact with the inner peripheral surface 1525 of the second cylindrical portion 1523 of the shaft side seal ring 152. To form

　上記実施例において、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。
また、第２円筒部1523の端面1526と外輪側シール環151 の側壁1515間にすきまＣのラビリンスシールが形成される。 In the above embodiment, the first auxiliary 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 grease in the bearing from leaking. 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 for preventing intrusion of foreign matter from the outside, and a seal portion is formed.
In this embodiment, since the first sub lip 1512 is in contact with the outer peripheral surface 122 of the shaft 12, the grease in the bearing is prevented from leaking from the fitting surface between the shaft side seal ring 152 and the shaft 12. It is also effective in preventing it.
In addition, a labyrinth seal having a clearance C is formed between the end surface 1526 of the second cylindrical portion 1523 and the side wall 1515 of the outer ring side seal ring 151.

　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（または非接触状態）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。 In addition, when the second auxiliary lip 1514 of the outer ring side seal ring 151 contacts the inner peripheral surface of the second cylindrical portion 1523 of the shaft side seal ring 152 (or in a non-contact state), a seal portion serving as an outer seal is formed. Further, the seal portion can shake off the cooling water and water vapor that are going to enter the bearing side by the cooperation 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、また主リップ1513が第１円筒部1521の外周面1524と接触することにより形成されるシール部と、第２副リップ1514が第２円筒部1523の内周面との間で接触することにより形成されるシール部の二重構造が形成される。 In short, the bearing seal device of the present invention provides a seal portion formed by the first sub lip 1512 contacting the outer peripheral surface 122 of the shaft body 12 and the main lip 1513 contacting the outer peripheral surface 1524 of the first cylindrical portion 1521. And the second sub lip 1514 is brought into contact with the inner peripheral surface of the second cylindrical portion 1523 to form a double structure of a seal portion formed.

　また外輪側シール環151 の第２副リップ1514は、腕部1514a と、該腕部1514a の先端に設けられた突起1514b とを有し、腕部1514a は軸側シール環152 の第２円筒部1523と平行に軸方向内側に延び、第２円筒部1523との間に軸方向シール隙間を形成している。また、腕部1514a の先端に設けられた突起1514b が、第２円筒部1523の内周面と接触している。
また、仮に摩耗により接触状態が非接触状態になったとしても、軸方向シール隙間によるラビリンスシールが形成されているため、冷却水、水蒸気等の侵入は防止される。 The second sub lip 1514 of the outer ring side seal ring 151 has an arm portion 1514a and a projection 1514b provided at the tip of the arm portion 1514a. The arm portion 1514a is a second cylindrical portion of the shaft side seal ring 152. It extends inward in the axial direction in parallel with 1523, and forms an axial seal gap with the second cylindrical portion 1523. Further, a protrusion 1514b provided at the tip of the arm portion 1514a is in contact with the inner peripheral surface of the second cylindrical portion 1523.
Even if the contact state is changed to a non-contact state due to abrasion, the labyrinth seal is formed by the axial seal gap, so that intrusion of cooling water, water vapor, and the like is prevented.

　さらに、軸側シール環152 の第２円筒部1523は、外輪101 の端部よりも軸方向内側に延びて、端面1526と外輪側シール環151 の側壁1515間にすきまＣのラビリンスシールを形成することにより、ウォータポンプ内の冷却水、水蒸気の侵入をくい止めることができる。 Further, the second cylindrical portion 1523 of the shaft-side seal ring 152 extends inward in the axial direction from the end of the outer ring 101 to form a labyrinth seal having a clearance C between the end surface 1526 and the side wall 1515 of the outer ring-side seal ring 151. Thus, the intrusion of cooling water and water vapor in the water pump can be prevented.

　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。 The reinforcing ring 1511 of the outer ring side seal ring 151 has one end 1511a fixed to the outer ring 101 and the other end 1511c extending toward the shaft via an intermediate portion 1511b formed in a cylindrical shape. The end 1511c is located axially outside the one end 1511a, and the other end 1511c reinforces the first sub lip 1512.
For this reason, the first sub lip 1512 can slidably contact the outer peripheral surface 122 of the shaft body 12 with a tightening force, and it is not necessary to use a garter spring or the like.

　図３は本発明の第２実施例を示す要部拡大断面図で、前記第１実施例と異なる点は軸側シール環152 の第２円筒部1523を半径方向外方に延ばしたフランジ部1527にある。
従って、外輪側シール環151 の側壁1515とフランジ部1527間のすきまＣ1 によりラビリンスシールが形成される。
作用効果は前記第１実施例と略同一につきその説明を省略する。 FIG. 3 is an enlarged sectional view of a main part showing a second embodiment of the present invention. The difference from the first embodiment is that a flange portion 1527 in which the second cylindrical portion 1523 of the shaft side seal ring 152 is extended radially outward. It is in.
Therefore, a labyrinth seal is formed by the clearance C1 between the side wall 1515 of the outer ring side seal ring 151 and the flange portion 1527.
The operation and effect are substantially the same as those of the first embodiment, and the description thereof is omitted.

　図４は本発明の第３実施例を示す要部拡大断面図で、第２実施例と異なる点は軸側シール環152 の第２円筒部1523の半径方向外方にさらに延びたフランジ部1527にある。
従って、前記フランジ部1527の外周端部と外輪101 の端部内周面1014間にすきまＣ2 によるラビリンスが形成される。
作用効果は前記第２実施例と略同一につき、その説明を省略する。 FIG. 4 is an enlarged sectional view of a main part showing a third embodiment of the present invention. The difference from the second embodiment is that a flange portion 1527 further extends radially outward of the second cylindrical portion 1523 of the shaft-side seal ring 152. It is in.
Therefore, a labyrinth is formed by the clearance C2 between the outer peripheral end of the flange 1527 and the inner peripheral surface 1014 of the end of the outer ring 101.
The operation and effect are substantially the same as those of the second embodiment, and the description thereof is omitted.

　図５は本発明の第４実施例を示す要部拡大断面図で、前記第１実施例と異なる点は補強環1611を有する外輪側シール環161 の第１副リップ1612と主リップ1613の両リップが軸体12に緊密嵌合固定された軸側シール環162 の第１円筒部1621の外周と接触状態にしたところと、軸側シール環162 の第２円筒部1623を半径方向外方に延びたフランジ部1627の側壁1628と外輪101 の端面1013間との間にすきまＣ3 によりラビリンスシールを形成したところにある。 FIG. 5 is an enlarged sectional view of a main part showing a fourth embodiment of the present invention. The difference from the first embodiment is that both the first sub lip 1612 and the main lip 1613 of the outer ring side seal ring 161 having the reinforcing ring 1611 are provided. When the lip is brought into contact with the outer periphery of the first cylindrical portion 1621 of the shaft-side seal ring 162 tightly fitted and fixed to the shaft body 12 and the second cylindrical portion 1623 of the shaft-side seal ring 162 is radially outward. The labyrinth seal is formed by a clearance C3 between the side wall 1628 of the extended flange portion 1627 and the end face 1013 of the outer race 101.

　従って、主リップ1613と第１円筒部1621の外周面1524間にシール部が形成され、またラビリンスシールがフランジ部1627の側壁1628と外輪101 の端面1013間のすきまＣ3 により形成される。また、フランジ部1627は、第２円筒部1623より半径方向外方に延びており、外輪側シール環161 をカバー状に覆っている。このため、外輪側シール環に冷却水等が直接かかることを防ぐことができる。
作用効果は前記第１実施例と略同一につきその説明を省略する。 Therefore, a seal portion is formed between the main lip 1613 and the outer peripheral surface 1524 of the first cylindrical portion 1621, and a labyrinth seal is formed by a clearance C3 between the side wall 1628 of the flange portion 1627 and the end surface 1013 of the outer ring 101. The flange portion 1627 extends radially outward from the second cylindrical portion 1623, and covers the outer ring side seal ring 161 in a cover shape. Therefore, it is possible to prevent the cooling water or the like from directly spraying on the outer ring side seal ring.
The operation and effect are substantially the same as those of the first embodiment, and the description thereof is omitted.

　図６は、本発明の第５実施例を示す要部拡大断面図で、前記第１実施例と異なる点は、補強環1711を有する外輪側シール環171 の第２副リップ1714が軸方向外側に延び、該第２副リップ1714に対応する位置に、軸側シール環172 の外周縁部1723の周囲にゴム、合成樹脂などの弾性体よりなる第２円筒部1724が形成されており、該第２円筒部1724の内周面と前記第２副リップ1714の外周面との間にすきまＣ4 をもった非接触型シール部を設けたところにある。
また前記第２円筒部1724は前記第２副リップ1714の外方傾斜端面1715に接触しない程度の内方傾斜端面1725が形成されている。 FIG. 6 is an enlarged sectional view of a main part showing a fifth embodiment of the present invention. The difference from the first embodiment is that the second auxiliary lip 1714 of the outer ring side seal ring 171 having the reinforcing ring 1711 At the position corresponding to the second sub lip 1714, a second cylindrical portion 1724 made of an elastic body such as rubber or synthetic resin is formed around an outer peripheral edge portion 1723 of the shaft side seal ring 172. A non-contact type seal having a clearance C4 is provided between the inner peripheral surface of the second cylindrical portion 1724 and the outer peripheral surface of the second sub lip 1714.
The second cylindrical portion 1724 is formed with an inwardly inclined end face 1725 that does not contact the outwardly inclined end face 1715 of the second sub lip 1714.

　また、軸側シール環の第２円筒部1724の端面1726と外輪側シール環171 の側壁1716間にわずかなすきまＣ5 が形成される。
従って、前記外輪側シール環の第２副リップと軸側シール環の非接触型シール部および軸側シール環のシール部の端面と外輪シール環の側壁間のすきまＣ4,Ｃ5によりラビリンスシールが形成され、冷却水、水蒸気などの侵入を防止することができる。符号1712は第１副リップ、1713は主リップである。 Also, a slight clearance C5 is formed between the end surface 1726 of the second cylindrical portion 1724 of the shaft side seal ring and the side wall 1716 of the outer ring side seal ring 171.
Therefore, a labyrinth seal is formed by the second sub-lip of the outer ring side seal ring, the non-contact type seal portion of the shaft side seal ring, and the clearance C4, C5 between the end face of the seal portion of the shaft side seal ring and the side wall of the outer ring seal ring. Thus, intrusion of cooling water, water vapor and the like can be prevented. Reference numeral 1712 denotes a first sub lip, and reference numeral 1713 denotes a main lip.

　図７は本発明の第６実施例を示す要部拡大断面図で、前記第１実施例と異なる点は、補強環1811を有する外輪側シール環181 の第２副リップ1814が軸方向外側に延び、該第２副リップ1814に対応する位置に、軸側シール環182 の外周縁部1823の周囲にゴム、合成樹脂などの弾性体による第２円筒部1824とその周縁部にリップが形成されており、該第２円筒部1824の内周面1525と第２副リップ1814の外周面との間にすきまＣ6 を有する非接触型シール部と接触型シール部1825を兼ね備えたところにある。
また前記第２円筒部1824は前記第２副リップ1814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1824はその周縁部のリップが外輪101 の端部内周面1014に接触してシールが形成される。 FIG. 7 is an enlarged sectional view of a main part showing a sixth embodiment of the present invention. The difference from the first embodiment is that the second sub lip 1814 of the outer ring side seal ring 181 having the reinforcing ring 1811 is disposed outward in the axial direction. At the position corresponding to the second sub lip 1814, a second cylindrical portion 1824 made of an elastic material such as rubber or synthetic resin is formed around an outer peripheral edge 1823 of the shaft side seal ring 182 and a lip is formed at the peripheral edge thereof. The non-contact type seal portion and the contact type seal portion 1825 having a clearance C6 between the inner peripheral surface 1525 of the second cylindrical portion 1824 and the outer peripheral surface of the second sub lip 1814 are provided.
In the second cylindrical portion 1824, a labyrinth seal is formed by a clearance C6 between the outer inclined surface 1816 of the second sub lip 1814 and the corresponding inner inclined surface 1826.
The lip of the second cylindrical portion 1824 at its peripheral edge contacts the inner peripheral surface 1014 at the end of the outer race 101 to form a seal.

　図８は本発明の第７実施例を示す要部拡大断面図で、前記第１実施例と異なる点は、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 の端部内周面1014に接触してシールが形成される。 FIG. 8 is an enlarged sectional view of a main part showing a seventh embodiment of the present invention. The difference from the first embodiment is that the outer peripheral edge of the second cylindrical portion 1523 of the shaft side seal ring 152 is directed radially outward. A radially outward contact-type seal portion 1528 made of an elastic material such as rubber or synthetic resin is provided around the extended flange portion 1527.
The lip of the contact type seal portion 1528 contacts the inner peripheral surface 1014 of the end of the outer ring 101 to form a seal.

　図９は本発明の第８実施例を示す要部拡大断面図で、前記第７実施例と異なる点は、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1529を設けたところにある。
従って、該接触型シール部1529はその先端が外輪101 の端面1013に接触してシールが形成される。 FIG. 9 is an enlarged sectional view of a main part showing an eighth embodiment of the present invention. The difference from the seventh embodiment is that the outer peripheral edge of the second cylindrical portion 1523 of the shaft side seal ring 152 is directed radially outward. A radially outward contact-type seal portion 1529 made of an elastic material such as rubber or synthetic resin is provided around the extended flange portion 1527.
Therefore, the tip of the contact-type seal portion 1529 contacts the end surface 1013 of the outer race 101 to form a seal.

　図１０は本発明の第９実施例を示す要部拡大断面図で、第１実施例と異なる点は、軸側シール環152 を、軸体12に緊密嵌合固定される第１円筒部1530と、これよりも軸方向内方で外径側に延びた中間部1531と、これに続き軸方向内側に延びた第２円筒部1532とにより断面ほぼＺ形状に形成したところにある。
従って、外輪側シール環151 の第１副リップ1512と主リップ1513の両リップは軸体12の外周面に接触状態にあると共に第２円筒部1532の端面1533と外輪側シール環151 の側面1515間のすきまＣ7 によりラビリンスシールが形成される。 FIG. 10 is an enlarged sectional view of a main part showing a ninth embodiment of the present invention. The difference from the first embodiment is that a shaft side seal ring 152 is tightly fitted and fixed to a shaft body 12 by a first cylindrical portion 1530. And an intermediate portion 1531 extending radially inward in the axial direction and a second cylindrical portion 1532 subsequently extending axially inward to form a substantially Z-shaped cross section.
Accordingly, both the first sub lip 1512 and the main lip 1513 of the outer ring side seal ring 151 are in contact with the outer peripheral surface of the shaft body 12 and the end surface 1533 of the second cylindrical portion 1532 and the side surface 1515 of the outer ring side seal ring 151. The clearance C7 forms a labyrinth seal.

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 which incorporated this invention apparatus. 図１の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 本発明の第２実施例を示す要部拡大断面図である。FIG. 6 is an enlarged sectional view of a main part showing a second embodiment of the present invention. 本発明の第３実施例を示す要部拡大断面図である。FIG. 8 is an enlarged sectional view of a main part showing a third embodiment of the present invention. 本発明の第４実施例を示す要部拡大断面図である。FIG. 11 is an enlarged sectional view of a main part showing a fourth embodiment of the present invention. 本発明の第５実施例を示す要部拡大断面図である。FIG. 11 is an enlarged sectional view of a main part showing a fifth embodiment of the present invention. 本発明の第６実施例を示す要部拡大断面図である。It is an important section expanded sectional view showing a 6th example of the present invention. 本発明の第７実施例を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the 7th Example of this invention. 本発明の第８実施例を示す要部拡大断面図である。It is an important section expanded sectional view showing an 8th example of the present invention. 本発明の第９実施例を示す要部拡大断面図である。It is an important section expanded sectional view showing a 9th example of the present invention.

符号の説明Explanation of reference numerals

　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
　151,161,171,181 ：外輪側シール環
　1511,1611,1711,1811 ：補強環
　1512,1612,1712 ：第１副リップ
　1514,1714,1814：第２副リップ
　1513,1613,1713：主リップ
　152,162,172,182 ：軸側シール環
　1521,1530,1621,1721 ：第１円筒部
　1522,1531,1622,1722 ：中間部
　1523,1532,1623,1724,1824 ：第２円筒部 101: Outer ring
11: Casing
12: Shaft 13: Rolling element 130: Pulley 14: Impeller
15: Seal device 151,161,171,181: Outer ring side seal ring
1511, 1611, 1711, 1811: Reinforcement ring 1512, 1612, 1712: First sub lip 1514, 1714, 1814: Second sub lip 1513, 1613, 1713: Main lip 152, 162, 172, 182: Shaft side seal ring 1521, 1530, 1621 1721: First cylindrical portion 1522,1531,1622,1722: Intermediate portion 1523,1532,1623,1724,1824: Second cylindrical portion

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第１副リップと主リップと該主リップよりも外径側に位置して軸方向外側に延びた第２副リップとを備えた外輪側シール環と、軸体に嵌合固定された第１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第２円筒部とを有する軸側シール環よりなり、少なくとも前記主リップが軸側シール環の第１円筒部の外周面と接するか、もしくは軸体の外周面と接し、第２副リップが軸側シール環の第２円筒部との間で接触または非接触のシール部を形成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 rows of rolling elements between an outer ring fixed to a casing and a shaft 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, the seal ring on the impeller side of the seal ring is a first auxiliary lip formed of a reinforcing ring and an elastic body such as rubber or synthetic resin. An outer ring side seal ring including a main lip, a second sub lip located on an outer diameter side of the main lip and extending axially outward, a first cylindrical portion fitted and fixed to the shaft body, A shaft-side seal ring having an intermediate portion extending more outwardly than this and a second cylindrical portion subsequently extending in the axial direction, wherein at least the main lip of the first cylindrical portion of the shaft-side seal ring is formed. Contact the outer peripheral surface or the outer peripheral surface of the shaft, and Flops bearing seal device for a water pump, characterized in that forming the seal portion of the contact or non-contact between the second cylindrical portion of the shaft seal 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第１副リップと主リップと、該主リップよりも外径側に位置して軸方向外側に延びた第２副リップとを備えた外輪側シール環および軸体に嵌合固定された第１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第２円筒部とを有する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、少なくとも前記主リップが軸側シール環の第１円筒部の外周面と接するか、もしくは軸体の外周面と接し、第２副リップが軸側シール環の第２円筒部との間で接触または非接触のシール部を形成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 a casing, a rotating shaft body having a pulley on one end side and an impeller on the other end side, a plurality of rows of rolling elements arranged between the outer ring and the shaft body, and a reinforcing ring Outer ring side seal having a first sub lip and a main lip formed of an elastic body such as rubber, synthetic resin, and the like, and a second sub lip located outside the main lip and extending axially outward. A shaft-side seal ring having a first cylindrical portion fitted and fixed to the ring and the shaft, an intermediate portion extending outwardly from the first cylindrical portion, and a second cylindrical portion extending in the axial direction following the first cylindrical portion. At least the main lip is in contact with the outer peripheral surface of the first cylindrical portion of the shaft-side seal ring, or is in contact with the outer peripheral surface of the shaft body, and the second auxiliary lip is in contact with the shaft-side seal ring. Forming a contact or non-contact seal portion with the second cylindrical portion of Bearing water pump characterized. 　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。

3. A water pump for water cooling of a motor vehicle, wherein the water pump bearing according to claim 2 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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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008196568A (en) * 2007-02-13 2008-08-28 Nok Corp Sealing device for water pump
JP2016080020A (en) * 2014-10-14 2016-05-16 Nok株式会社 Sealing device
KR20180051391A (en) * 2016-11-07 2018-05-16 가부시키가이샤 제이텍트 Sealing structure
CN108071691A (en) * 2016-11-07 2018-05-25 株式会社捷太格特 sealing structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008196568A (en) * 2007-02-13 2008-08-28 Nok Corp Sealing device for water pump
JP2016080020A (en) * 2014-10-14 2016-05-16 Nok株式会社 Sealing device
KR20180051391A (en) * 2016-11-07 2018-05-16 가부시키가이샤 제이텍트 Sealing structure
JP2018080828A (en) * 2016-11-07 2018-05-24 株式会社ジェイテクト Seal structure
CN108071691A (en) * 2016-11-07 2018-05-25 株式会社捷太格特 sealing structure
CN108071691B (en) * 2016-11-07 2020-11-24 株式会社捷太格特 Sealing structure
TWI745470B (en) * 2016-11-07 2021-11-11 日商捷太格特股份有限公司 Sealing structure
KR102433047B1 (en) 2016-11-07 2022-08-18 가부시키가이샤 제이텍트 Sealing structure

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