JPH11210684A - Bearing seal device for water pump, bearing for water pump, and water pump for water-cooled engine of automobile - Google Patents
Bearing seal device for water pump, bearing for water pump, and water pump for water-cooled engine of automobileInfo
- Publication number
- JPH11210684A JPH11210684A JP10315466A JP31546698A JPH11210684A JP H11210684 A JPH11210684 A JP H11210684A JP 10315466 A JP10315466 A JP 10315466A JP 31546698 A JP31546698 A JP 31546698A JP H11210684 A JPH11210684 A JP H11210684A
- Authority
- JP
- Japan
- Prior art keywords
- lip
- shaft
- ring
- seal ring
- water pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- F16C19/08—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 two or more rows of 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】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、ウォータ
ポンプ用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
プ用軸受および自動車の水冷エンジン用ウォータポンプ
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing seal device for a water pump, a bearing for a water pump, and a water pump suitable for a water-cooled engine of an automobile and the like. The present invention relates to a bearing seal device for a water pump, a bearing for a water pump, and a water pump for a water-cooled engine of an automobile, which prevent intrusion of grease in the bearing at the same time.
【０００２】[0002]
【従来の技術】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。2. Description of the Related Art Generally, a water pump for pumping cooling water for an engine 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 the axial direction. The bearing is a sealed bearing with a seal in order to prevent the cooling water from entering the bearing as in the case of a normal pump.
【０００３】[0003]
【発明が解決しようとする課題】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 running and stopping of the engine are repeated, the sealed bearing with the seal is repeatedly heated and cooled, and expands and contracts repeatedly, thereby easily impairing the sealing function.
【０００４】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。[0004] In particular, steam generated by heating the engine cooling water during operation of the engine is likely to pass through the seal device and enter the bearing. Usually, a lubricant such as grease for lubricating the bearing is contained in the bearing that supports the pump rotating shaft. ,
There is a danger that poor durability results in poor lubrication, resulting in an increase in rotational resistance of the rotary shaft of the pump, seizure and the like.
【０００５】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。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。A conventional bearing seal device is known, for example, from Japanese Unexamined Utility Model Publication No. 62-66026, which is disclosed in FIG. 2, FIG. 3 and FIG. As described above, the outer periphery of the bearing is fixed to the outer ring end, and a plurality of radial lips formed on the inner periphery are sealed by a seal body having a structure in which the radial lip is in sliding contact with the outer peripheral surface of the shaft. However, in this type of conventional technology, 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 engine operation enters the bearing. Cheap.
【０００６】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。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２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。[0006] Japanese Patent Application Laid-Open Publication No. Sho 60-107459 is also known, but the prior art discloses an outer ring having a plurality of radial contact lips, and a metal contacting a seal lip of the outer ring. A main seal lip of the outer ring is provided on the small diameter side, and an auxiliary seal lip is provided on the large diameter side so as to protrude outward.The inner ring has a smaller diameter than the outer ring and has a plurality of axial directions. In this structure, the main seal lip and the auxiliary seal lip are brought into contact with the respective outer peripheral surfaces of the inner ring in the axial direction, and the auxiliary seal lip contacts the inner ring at an angle of 45 °. But,
In this type of prior art, 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 operation of the engine from entering the bearing. Was effective, but the main seal lip protruded outwardly, so that it was insufficient to prevent grease from flowing out of the bearing.
【０００７】また、実開昭６２−６９６２５号公報記載
のものも知られている。該従来技術は、自動車のホイー
ルを支持する軸受装置であり、そのシール装置は、補強
環と第１副リップと主リップと第２副リップを有する外
輪側シール環と、第１円筒部と中間部と第２円筒部とを
有する軸側シール環とが設けられており、第２副リップ
は、軸側シール環の内側でラビリンスシールを構成し、
補強環は、円筒部が外輪に固定され、それに続き内輪側
に真直ぐに延びる部分を有する。しかしながら、第１副
リップは補強環とはなれており、剛性において劣る。[0007] Japanese Unexamined Utility Model Publication No. 62-69625 is also known. The prior art is a bearing device that supports a wheel of an automobile, and the sealing device includes an outer ring side seal ring having a reinforcing ring, a first sub lip, a main lip, and a second sub lip, a first cylindrical portion and an intermediate portion. A shaft-side seal ring having a portion and a second cylindrical portion, wherein the second sub-lip forms a labyrinth seal inside the shaft-side seal ring;
The reinforcing ring has a portion in which the cylindrical portion is fixed to the outer ring, and subsequently extends straight to the inner ring side. However, the first sub lip is separated from the reinforcing ring and is inferior in rigidity.
【０００８】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
プ用軸受および自動車の水冷エンジン用ウォータポンプ
を提供することである。The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to almost certainly prevent cooling water, water vapor, and the like from entering a bearing. At the same time, it is an object of the present invention to provide a bearing seal device for a water pump, a bearing for a water pump, and a water pump for a water-cooled engine of an automobile, which prevent grease from flowing out of the bearing.
【０００９】[0009]
【課題を解決するための手段】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
備えた回転する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、一端部が外輪に固定され、円筒状に形成された中
間部を介して、他端部が軸体側に延びる補強環と、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する第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円筒部とを有し、軸体と
共に回転する軸側シール環とで構成され、前記主リップ
が軸側シール環の第１円筒部の外周面と摺接し、第１副
リップが主リップより軸方向内側で回転部材の外周面と
摺接し、第２副リップが主リップよりも外径側で軸側シ
ール環と摺接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、一端部が外輪に固定され、円筒状に形成された中
間部を介して、他端部が軸体側に延びる補強環と、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する第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円筒部とを有し、軸
体と共に回転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、前記主リップが軸側シ
ール環の第１円筒部の外周面と摺接し、第１副リップが
主リップより軸方向内側で回転部材の外周面と摺接し、
第２副リップが主リップよりも外径側で軸側シール環と
摺接していることである。さらに、自動車用の水冷エン
ジン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請求項２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 plurality of rows of rolling elements are provided between an outer ring fixed to a casing and a rotating shaft having a pulley on one end and an impeller on the other end, and fixed to both ends of the outer ring. In a bearing seal device for a water pump in which a seal ring is used to seal between a shaft and a shaft body, the seal ring on the impeller side of the seal ring has an end portion fixed to an outer ring and an intermediate portion formed in a cylindrical shape. , A first auxiliary lip and a main lip formed of an elastic body such as rubber or synthetic resin, and a second auxiliary lip located on the outer diameter side of the main lip. An outer ring-side seal ring having a lip, a first cylindrical portion fitted and fixed to the shaft, and an intermediate portion extending outwardly from the first cylindrical portion;
A second cylindrical portion extending in the axial direction is provided subsequently to the first cylindrical portion, and the main lip is slidably in contact with the outer peripheral surface of the first cylindrical portion of the shaft-side seal ring. The first sub lip is in sliding contact with the outer peripheral surface of the rotating member on the inner side in the axial direction of the main lip, and the second sub lip is in sliding contact with the shaft side seal ring on the outer diameter side of the main lip. Further, as a water pump bearing, an outer ring fixed to a casing, a rotating shaft having a pulley on one end and an impeller on the other end, and a plurality of shafts disposed between the outer ring and the shaft. A row of rolling elements, one end of which is fixed to the outer race, a reinforcing ring whose other end extends toward the shaft via an intermediate part formed in a cylindrical shape, and a second ring formed of an elastic body such as rubber or synthetic resin. A first cylindrical portion fitted and fixed to an outer ring side seal ring and a shaft body having one sub lip, a main lip, and a second sub lip located on an outer diameter side of the main lip; An intermediate portion extending radially, and a second cylindrical portion extending in the axial direction following the intermediate portion, and a sealing device on the impeller side including a shaft-side seal ring that rotates together with the shaft body. The lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, and the first sub lip is Tsu axially inward in contact with the outer peripheral surface of the rotating member and the sliding than flop,
The second sub lip is in sliding contact with the shaft side seal ring on the outer diameter side of the main lip. Furthermore, as a water pump for a water-cooled engine for automobiles, it has an impeller at the end,
A water pump bearing according to claim 2 fixed to a casing is used.
【００１０】[0010]
【作用】本発明の構成によれば、主リップが軸側シール
環の第１円筒部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、第１副リップが回転部材の外
周面と摺接することにより、軸受内のグリースが洩れる
のを防止し、さらに第２副リップが主リップよりも外径
側で軸側シール環と摺接していること及び軸側シール環
の中間部と第２円筒部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。また、補強環
を一端部を外輪に固定し、円筒状に形成された中間部を
介して他端部が軸体側に延びるようにしたので、第１副
リップの緊迫力をもって回転部材の外周面と摺接するこ
とができる。According to the structure of the present invention, the main lip is brought into sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, thereby preventing the invasion of foreign matter from the outside, and the first sub lip is formed of the rotating member. The grease in the bearing is prevented from leaking by being in sliding contact with the outer peripheral surface, and the second sub-lip is in sliding contact with the shaft-side seal ring on the outer diameter side from the main lip, and the middle of the shaft-side seal ring. The cooling water and steam that are to enter the bearing side can be shaken off by the portion and the second cylindrical portion. Also, since the reinforcing ring has one end fixed to the outer ring and the other end extending toward the shaft body via the intermediate portion formed in a cylindrical shape, the outer peripheral surface of the rotating member is pressed by the tension force of the first sub lip. Can be in sliding contact with
【００１１】[0011]
【実施例】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。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。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the technical means of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical 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.
【００１２】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 a rolling bearing for a water pump. Reference numeral 101 denotes an outer ring of the rolling bearing 10. The outer ring 101 is fixed to an 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. Are formed.
【００１３】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. One end of the shaft 12 is provided with a pulley.
130 and an impeller 14 at the other end. (See FIG. 1) 121 is a shaft body facing the raceway groove 1011 of the outer ring 101.
12 is a raceway groove formed on the outer peripheral surface of FIG.
【００１４】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15
13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 an outer ring side seal ring 151 and an axial side seal ring fixed to the seal groove 1012 of the outer ring 101 on the impeller 14 side.
An outer ring side seal ring 151 of the seal device 15 has a reinforcing ring 1511 and at least an axially inward first sub-lip 1512 formed of an elastic body such as rubber or synthetic resin and an axially outer seal ring 151. Oriented main lip 1513 and the main lip 15
13 and a second sub lip 1514 which is located on the outer diameter side and extends outward in the axial direction. In addition, the reinforcing ring 1511
One end 1511a is fixed to the outer ring 101, and the other end 1511c extends toward the shaft via an intermediate portion 1511b formed in a cylindrical shape (see FIG. 2).
【００１５】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 for corrosion resistance, for example, a stainless steel plate, and has a substantially U-shaped cross section, and is tightly fitted to the shaft body 12. It is composed of a first cylindrical portion 1521 to be fixed, an intermediate portion 1522 extending radially outward from the first cylindrical portion 1521, and a second cylindrical portion 1523 subsequently extending axially inward.
【００１６】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 the outer peripheral surface 122 of the shaft body 12 is provided.
The main lip 1513 is provided in the axially outward direction, and is in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521 of the shaft-side seal ring 152 to form a seal portion. A seal is formed between the ring 152 and the inner peripheral surface 1525 of the second cylindrical portion 1523.
【００１７】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
なす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 outer ring side seal ring 151 is used.
The first sub lip 1512 is provided inward in the axial direction to
The grease in the bearing is prevented from leaking by contacting the outer peripheral surface 122 of the shaft, and the main lip 1513 is brought into contact with the outer peripheral surface 1524 of the first cylindrical portion 1521 of the shaft side seal ring 152 so that foreign matter from outside can be prevented. A seal is formed which serves as an intermediate seal to prevent intrusion. 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. Also, the end surface 1526 of the second cylindrical portion 1523 and the outer ring side seal ring
A labyrinth seal with a clearance C is formed between the side walls 1515 of the base 151.
【００１８】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。The second auxiliary lip of the outer ring side seal ring 151
A seal portion serving as an external seal is formed by contacting (or non-contacting) the inner peripheral surface of the second cylindrical portion 1523 of the shaft side seal ring 152 with the shaft side seal ring 152.
The cooperation between the intermediate portion 1522 and the second cylindrical portion 1523 makes it possible to shake off the cooling water and water vapor that tend to enter the bearing.
【００１９】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 is 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. Seal portion and the second sub lip 1514
A double structure of the seal portion formed by contact with the inner peripheral surface of the cylindrical portion 1523 is formed.
【００２０】また外輪側シール環151 の第２副リップ15
14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 auxiliary lip 15 of the outer ring side seal ring 151
14 has an arm 1514a and a protrusion 1514b provided at the tip of the arm 1514a. The arm 1514a extends inward in the axial direction in parallel with the second cylindrical portion 1523 of the shaft-side seal ring 152. 2 cylindrical part
An axial seal gap is formed between the gap and the seal 1523. Also,
A protrusion 1514b provided at the tip of the arm 1514a is in contact with the inner peripheral surface of the second cylindrical portion 1523. Further, even if the contact state is changed to the non-contact state due to wear, since a labyrinth seal is formed by the axial seal gap, intrusion of cooling water, water vapor, and the like is prevented.
【００２１】さらに、軸側シール環152 の第２円筒部15
23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 15 of the shaft side seal ring 152
23 extends inward in the axial direction from the end of the outer ring 101 and has an end face
By forming a labyrinth seal with a clearance C between 1526 and the side wall 1515 of the outer ring side seal ring 151, the intrusion of cooling water and water vapor in the water pump can be suppressed.
【００２２】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
Since one end 1511a is fixed to the outer ring 101 and the other end 1511c extends toward the shaft via an intermediate portion 1511b formed in a cylindrical shape, the other end 1511c is axially outside the one end 1511a. And the other end 1511c reinforces the first sub lip 1512. Therefore, the first sub lip 1512 can slidably contact 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.
【００２３】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15
2 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 of a second embodiment of the present invention, which differs from the first embodiment in that a shaft-side seal ring 15 is provided.
The second cylindrical portion 1523 is provided on a flange portion 1527 extending radially outward. Therefore, the side wall 1515 of the outer ring side seal ring 151
A labyrinth seal is formed by the clearance C1 between the flange portion 1527 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.
【００２４】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 the second embodiment further extends radially outward of the second cylindrical portion 1523 of the shaft-side seal ring 152. It is on the flange 1527. 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.
【００２５】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 showing a main part of a fourth embodiment of the present invention, which differs from the first embodiment in that a first auxiliary lip 1612 and a main lip of an outer ring side seal ring 161 having a reinforcing ring 1611 are provided.
When both lips 1613 are 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 Side wall 1628 of flange portion 1627 extending outward and end surface of outer ring 101
A labyrinth seal is formed by a gap C3 between the labyrinth seal and the gap between the labyrinth seal 103 and the gap 1013.
【００２６】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。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。Accordingly, a seal portion is formed between the main lip 1613 and the outer peripheral surface 1524 of the first cylindrical portion 1621, and the labyrinth seal is formed between the side wall 1628 of the flange portion 1627 and the end surface 1013 of the outer ring 101.
It is formed by a gap C3. The operation effect is the first
The description is omitted because it is substantially the same as the embodiment.
【００２７】[0027]
【発明の効果】以上各実施例にて述べたように、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。As described in each of the embodiments described above, the double sealing structure of the sealing portion can exert a low torque and strong sealing function 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.
【００２８】また補強環を、一端部を外輪に固定し、円
筒状に形成された中間部を介して他端部が軸体側に延び
るようにしたので、第１副リップの緊迫力をもって回転
部材の外周面と摺接することができる。さらに、主リッ
プが軸側シール環の第１円筒部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、第１副リップ
が回転部材の外周面と摺接することにより、軸受内のグ
リースが洩れるのを防止し、さらに第２副リップが主リ
ップよりも外径側で軸側シール環と摺接していること及
び軸側シール環の中間部と第２円筒部により軸受側に侵
入しようとする冷却水、水蒸気を振り切ることができ
る。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。Further, the reinforcing ring has one end fixed to the outer ring and the other end extending toward the shaft via the intermediate portion formed in a cylindrical shape. Can be in sliding contact with the outer peripheral surface of Further, since the main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft-side seal ring, intrusion of foreign matter from the outside is prevented, and the first sub lip is in sliding contact with the outer peripheral surface of the rotating member. The grease inside is prevented from leaking, and the second sub-lip is in sliding contact with the shaft-side seal ring on the outer diameter side from the main lip, and the intermediate portion of the shaft-side seal ring and the second cylindrical portion are used to reduce the bearing side. Cooling water and steam that are going to enter the water can be shaken off. Therefore, it is possible to remarkably prolong the life of the bearing, and also to achieve the effects and advantages unique to the present invention, such as the improvement of the reliability of the water pump itself.
【図１】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。FIG. 1 is a cross-sectional view of a main part of a water pump incorporating the device of the present invention.
【図２】図１の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.
【図３】本発明の第２実施例を示す要部拡大断面図であ
る。FIG. 3 is an enlarged sectional view of a main part showing a second embodiment of the present invention.
【図４】本発明の第３実施例を示す要部拡大断面図であ
る。FIG. 4 is an enlarged sectional view of a main part showing a third embodiment of the present invention.
【図５】本発明の第４実施例を示す要部拡大断面図であ
る。FIG. 5 is an enlarged sectional view of a main part showing a fourth embodiment of the present invention.
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 ：外輪側シール環 1511,1611 ：補強環 1511a : 一端部 1511b : 中間部 1511c : 他端部 152,162 ：軸側シール環 1512,1612 ：第１副リップ 1514：第２副リップ 1513,1613：主リップ 1521,1530,1621 ：第１円筒部 1522,1531,1622 ：中間部 1523,1532,1623 ：第２円筒部 101: Outer ring 11: Casing 12: Shaft 13: Rolling element 130: Pulley 14: Impeller 15: Sealing device 151,161: Outer ring side seal ring 1511, 1611: Reinforcement ring 1511a: One end 1511b: Middle part 1511c: Other end 152, 162 : Shaft side seal ring 1512, 1612: first sub lip 1514: second sub lip 1513, 1613: main lip 1521, 1530, 1621: first cylindrical portion 1522, 1531, 1622: intermediate portion 1523, 1532, 1623: second 2 cylindrical part
Claims (3)
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、一端部が外
輪に固定され、円筒状に形成された中間部を介して、他
端部が軸体側に延びる補強環と、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する第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円筒部とを有し、軸体と共に回転する軸側シ
ール環とで構成され、前記主リップが軸側シール環の第
１円筒部の外周面と摺接し、第１副リップが主リップよ
り軸方向内側で回転部材の外周面と摺接し、第２副リッ
プが主リップよりも外径側で軸側シール環と摺接してい
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 plurality of rolling elements are provided between an outer ring fixed to a casing and a rotating shaft having a pulley at one end and an impeller at the other end, and both ends of the outer ring. In a bearing seal device for a water pump in which a seal ring is fixed to a shaft body by a seal ring fixed to a portion, of the seal rings, a seal ring on an impeller side has one end fixed to an outer ring, and has a cylindrical shape. A reinforcing ring whose other end extends toward the shaft body via the formed intermediate portion, a first sub lip and a main lip formed of an elastic body such as rubber or synthetic resin, and an outer diameter side with respect to the main lip. An outer ring side seal ring having a second sub lip located therein, a first cylindrical portion fitted and fixed to the shaft body, an intermediate portion extending outwardly from the outer ring side, and subsequently extending in the axial direction And a shaft-side seal ring that rotates together with the shaft body. The main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft-side seal ring, the first sub lip is in sliding contact with the outer peripheral surface of the rotating member axially inside the main lip, and the second sub lip is in sliding contact with the main lip. A bearing seal device for a water pump, wherein the outer diameter side is also in sliding contact with the shaft side seal ring.
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、一端部が外輪に固定され、円筒状に形成された中間
部を介して、他端部が軸体側に延びる補強環と、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する第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円筒部とを有し、軸体と共
に回転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、前記主リップが軸側シール環
の第１円筒部の外周面と摺接し、第１副リップが主リッ
プより軸方向内側で回転部材の外周面と摺接し、第２副
リップが主リップよりも外径側で軸側シール環と摺接し
ていることを特徴とするウォータポンプ用軸受。2. An outer ring fixed to a casing, a rotating shaft provided with a pulley at one end and an impeller at the other end, and a plurality of rows of rollers arranged between the outer ring and the shaft. A moving body, a reinforcing ring whose one end is fixed to the outer ring, and the other end of which extends to the shaft body side via an intermediate portion formed in a cylindrical shape;
A first sub-lip formed of an elastic body such as a synthetic resin, a main lip, and a second sub-lip located on an outer diameter side of the main lip are fitted and fixed to an outer ring side seal ring and a shaft body. An impeller side including a first cylindrical portion, 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 including a shaft-side seal ring that rotates together with the shaft body. The main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, and the first sub lip is in sliding contact with the outer peripheral surface of the rotating member axially inside the main lip. 2. A bearing for a water pump, wherein the secondary lip is in sliding contact with the shaft side seal ring on the outer diameter side of the main lip.
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エンジン用ウォータポ
ンプ。3. A water pump for a water-cooled engine of a motor vehicle, wherein the water pump bearing has an impeller at an end thereof and is fixed to a casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31546698A JP3161432B2 (en) | 1990-01-30 | 1998-10-19 | Bearing seal device for water pump, bearing for water pump, and water pump for water-cooled engine of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31546698A JP3161432B2 (en) | 1990-01-30 | 1998-10-19 | Bearing seal device for water pump, bearing for water pump, and water pump for water-cooled engine of automobile |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2572297A Division JP2890355B2 (en) | 1997-01-27 | 1997-01-27 | Bearing seal device for water pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11210684A true JPH11210684A (en) | 1999-08-03 |
| JP3161432B2 JP3161432B2 (en) | 2001-04-25 |
Family
ID=18065706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31546698A Expired - Lifetime JP3161432B2 (en) | 1990-01-30 | 1998-10-19 | Bearing seal device for water pump, bearing for water pump, and water pump for water-cooled engine of automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3161432B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020250579A1 (en) * | 2019-06-12 | 2020-12-17 | Nok株式会社 | Sealing device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606519B (en) * | 2012-03-27 | 2013-10-30 | 上海阿波罗机械股份有限公司 | Boric acid recirculation pump |
-
1998
- 1998-10-19 JP JP31546698A patent/JP3161432B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020250579A1 (en) * | 2019-06-12 | 2020-12-17 | Nok株式会社 | Sealing device |
| JPWO2020250579A1 (en) * | 2019-06-12 | 2020-12-17 | ||
| CN113939663A (en) * | 2019-06-12 | 2022-01-14 | Nok株式会社 | Sealing device |
| US11796004B2 (en) | 2019-06-12 | 2023-10-24 | Nok Corporation | Sealing device |
| CN113939663B (en) * | 2019-06-12 | 2024-02-13 | Nok株式会社 | Sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3161432B2 (en) | 2001-04-25 |
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