JP3702517B2 - Oil-air lubrication structure - Google Patents

Oil-air lubrication structure Download PDF

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Publication number
JP3702517B2
JP3702517B2 JP33901495A JP33901495A JP3702517B2 JP 3702517 B2 JP3702517 B2 JP 3702517B2 JP 33901495 A JP33901495 A JP 33901495A JP 33901495 A JP33901495 A JP 33901495A JP 3702517 B2 JP3702517 B2 JP 3702517B2
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Japan
Prior art keywords
oil
air
outer ring
air flow
supplied
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JP33901495A
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Japanese (ja)
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JPH09178085A (en
Inventor
幸夫 佐藤
正夫 伊藤
靖 天野
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NSK Ltd
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NSK Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、軸に外嵌された内輪とハウジングに内嵌されたつば付き外輪との間にころを転動自在に配設して前記軸を軸方向に支持するスラスト軸受をオイルエアで潤滑する構造に関する。
【0002】
【従来の技術】
従来のこの種のオイルエア潤滑構造としては、例えば、西ドイツ特許DE2844995号、特開平5−340499号公報及び実開平4−52618号公報に記載のものが知られている。これらは、例えば圧延機用ロールの軸端を支持する複数の転がり軸受を潤滑する場合に、1本のオイルエア供給路に供給されたオイルエア(圧縮空気と油)を該供給路に介在された分配器によって分配して各転がり軸受に供給するようにしたものである。
【0003】
【発明が解決しようとする課題】
ところで、オイルエア潤滑は、エア圧によりオイルを給油通路の壁に沿って潤滑対称物まで搬送するもので、ジェット給油等による潤滑に比べて、設備の簡略化が図れると共に、外部への油漏れを心配しなくて済み、しかも使用油量を極端に少なくすることができるという利点を有する反面、使用油量が少ないことから特につば付きスラスト軸受の潤滑においては外輪つばの周方向全周に均等にオイルを供給する必要がある。
【0004】
しかしながら、上記従来の各オイルエア潤滑構造においては、いずれも、分配器によって分配されたオイルエアを各転がり軸受に供給するだけの構造であるため、スラスト軸受の外輪つばの周方向全周に均等にオイルを供給することができず、該スラスト軸受の十分な潤滑を行うことができないという不都合がある。
本発明はかかる不都合を解消するためになされたものであり、スラスト軸受の外輪つばの周方向全周に均等にオイルを供給することができるようにして、該スラスト軸受の十分な潤滑を行うことができるオイルエア潤滑構造を提供することを目的とする。
【0005】
【課題を解決するための手段】
かかる目的を達成するために、本発明に係るオイルエア潤滑構造は、軸に外嵌された内輪とハウジングに内嵌されたつば付き外輪との間にころを転動自在に配設して前記軸を軸方向に支持するスラスト軸受をオイルエアで潤滑する構造であって、前記ハウジングに穿設されたオイルエア供給路と、前記外輪の外径面と該外径面を臨むハウジングの内径面との間に軸方向に互いに離間して複数配置され、前記外輪の周方向に沿って延設されたオイルエア流通路と、該複数のオイルエア流通路と前記オイルエア供給路との間に穿設され、該オイルエア供給路に供給されたオイルエアを前記複数のオイルエア流通路にそれぞれ略等量となるように分配供給するオイルエア分配路と、前記外輪に前記複数のオイルエア流通路毎に穿設され、該オイルエア流通路に一端部が連通すると共に前記外輪のつばの逃げ部に他端部が開口して前記複数のオイルエア流通路に分配供給されたオイルエアを前記逃げ部に個別に導く複数のオイルエア流出路とを備え、該複数のオイルエア流出路を前記外輪の周方向に位相をずらして配置したことを特徴とする。
【0006】
【発明の実施の形態】
以下、本発明の実施の形態の一例を図1〜図5を参照して説明する。図1は本発明の実施の形態の一例であるオイルエア潤滑構造を説明するための説明的断面図、図2は図1の部分拡大図、図3は図2のA矢視図、図4はつば付き外輪の断面図、図5は図4の右側面図である。
【0007】
図1において符号1は圧延機用ロール2の軸端を回動可能に支持する4列の円筒ころ軸受(ラジアル軸受)であり、該円筒ころ軸受1はロール2に外嵌された内輪3とチョック4に内嵌された外輪5との間に円筒ころ6を転動自在に配設して該ロール2のラジアル荷重を受け止めるようにされている。また、符号7は円筒ころ軸受1の左側でロール2の軸端を回動可能に支持するスラスト円すいころ軸受であり、該スラスト円すいころ軸受7はロール2に外嵌された内輪8とチョック9に内嵌された一対のつば付き外輪10との間に円すいころ11を転動自在に配設して該ロール2のアキシアル荷重を受け止めるようにされている。尚、符号12,13は共に間座を示す。
【0008】
円筒ころ軸受1が組み込まれたチョック4とスラスト円すいころ軸受7が組み込まれたチョック9とはボルト等によって一体に結合されており、チョック4にはオイルエアが供給されるオイルエア供給路14が軸方向に沿って穿設されている。オイルエア供給路14からは径方向内方に延びる4つの分岐路15a〜15dがオイルエア供給路14の軸方向に穿設され、また、分岐路15aより上流側のオイルエア供給路14からは径方向外方に延びた後、軸方向に延びて外部に開口する分岐路15eが穿設されている。
【0009】
オイルエア供給路14の各分岐路15a〜15c,15eに対応する位置にはそれぞれカートリッジ型分配器16a〜16c,16eが配設されており、従って、オイルエア供給路14に供給されたオイルエアは、まず、分配器16eによって分配されて分岐路15eに流入した後、該分岐路15eの開口部17に一端が接続された連結管18に導かれる。分配器16eを通過したオイルエアは、分配器16a〜16cによって分配されてそれぞれ分岐路15a〜15cに流入し、その後、円筒ころ軸受1の互いに隣り合う円筒ころ6間に供給され、これにより円筒ころ軸受1のオイルエア潤滑が行われる。分配器16cを通過したオイルエアは分岐路15dに流入し、その後、円筒ころ軸受1の右側に配設されたオイルシールリップ部19まで導かれて該リップ部19に供給され、これにより該リップ部19の潤滑が行われる。
【0010】
スラスト円すいころ軸受7が組み込まれたチョック9には、上述した連結管18を介してオイルエアが供給されるオイルエア供給路20が穿設されている。オイルエア供給路20は、図2に示すように、チョック9の壁部内を軸方向に沿って延びるメイン流路20aを備えており、該メイン流通路20aからは径方向外方に延びてチョック9の外周面に開口する流入路20bが穿設されている。流入路20bの開口部には連結管18の他端が接続されており、これによりオイルエア供給路20にオイルエアが供給される。流入路20bより下流側のメイン流通路20aからは径方向内方に延びる分岐路20c,20dがメイン流通路20aの軸方向に互いに離間して穿設されており、分岐路20c,20dの各先端はそれぞれ一対のつば付き外輪10の外径面を指向している。
【0011】
また、メイン流通路20aの分岐路20cに対応する位置にはカートリッジ型分配器21が配設されており、従って、流入路20bからメイン流通路20aに流入するオイルエアは分配器21によって分配されて分岐路20cに導かれ、分配器21を通過したオイルエアはメイン流通路20aを下流側に向けて流れた後、分岐路20dに導かれる。分岐路20c,20dの下流側の各端部には、径方向内方に向けて次第に拡径してチョック9の内径面に開口するテーパ穴(オイルエア分配路)22がそれぞれ形成されており、該テーパ穴22の最終端部はつば付き外輪10の外径面を覆うようにされている。
【0012】
つば付き外輪10の外径面には、軸方向に互いに離間配置された3本の凹溝(オイルエア流通路)23a,23b,23cが周方向全周に沿って形成されている。図3に示すように、凹溝23aから凹溝23cまでの寸法Sはテーパ穴22の最終端の穴径と同一とされて、該最終端が3本の凹溝23a,23b,23cを覆うようにされている。ここで、3本の凹溝23a,23b,23cを臨むテーパ穴22の最終端の周縁部22aの長さは、各凹溝23a,23b,23cで略同じ長さになるようにしている。つまり、L1 (凹溝23aを臨む周縁部22aの長さ)=2L2 (凹溝23bを臨む周縁部22aの長さ)=L3 (凹溝23cを臨む周縁部22aの長さ)となるように各凹溝23a,23b,23cの幅を決めている。これにより、エア圧によってテーパ穴22の内径面に沿って所定の油膜厚さを形成しながら搬送されるオイルを各凹溝23a,23b,23cに等量に分配供給することができる。凹溝23a,23b,23cの両側には、オイルエアの漏れを防止するOリング24が設けられている。
【0013】
各凹溝23a,23b,23cの底部には、オイルエア流出路25a,25b,25cの各一端がそれぞれ連通している。オイルエア供給路25a,25b,25cは、図2及び図4に示すように、つば付き外輪10内を径方向内方に延びた後、90°屈曲して軸方向に沿って延びて各他端が外輪つば26の逃げ部27に開口している。これにより、各凹溝23a,23b,23cに分配供給されたオイルエアを逃げ部27に個別に導くようにされている。
【0014】
ここで、この実施の形態では、図5に示すように、オイルエア流出路25a,25b,25cをそれぞれつば付外輪10の周方向に90°ピッチで4箇所ずつ合計12箇所設け、且つ、オイルエア流出路25a,25b,25cをつば付外輪10の周方向に30°ずつ位相をずらして配置している。これにより、オイルエア流出路25a,25b,25cの各他端開口から吐出するオイルを外輪つば面及び軌道面の周方向全周に均等量供給することができる。
【0015】
更に詳述すると、図6に示すように、つば付外輪10の外径面に凹溝23を1本だけ形成して、該凹溝23に供給されたオイルエアを周方向に等間隔で設けた複数のオイルエア流出路25から吐出するようにした場合は、凹溝23に供給されたオイルエアが重力の影響を受けて凹溝23内で偏在するため、複数のオイルエア流出路25から吐出するオイルの量にばらつきが生じて該オイルを外輪つば面及び軌道面の周方向全周に均等量供給することができない。
【0016】
これに対し、この実施の形態では、つば付外輪10の外径面に3本の凹溝23a,23b,23cを形成すると共に、テーパ穴22を介して各凹溝23a,23b,23cに等量のオイルエアを分配供給し、更に各凹溝23a,23b,23cに分配供給されたオイルエアを互いに位相をずらして周方向に等間隔で設けられた複数のオイルエア流出路25a,25b,25cから吐出するようにしているので、上述したように各オイルエア流出路25a,25b,25cから吐出するオイルを外輪つば面及び軌道面の周方向全周に均等量供給することができ、この結果、スラスト円すいころ軸受8の十分な潤滑が可能になって該軸受8の焼き付きやかじり等のトラブルを解消することができる。
【0017】
尚、上記実施の形態では、凹溝23aから凹溝23cまでの寸法Sをテーパ穴22の最終端の穴径と同一とした場合を例に採ったが、必ずしもこのようにする必要はなく、例えば、図3で二点鎖線で示すように、テーパ穴22の最終端の穴径を凹溝23aから凹溝23cまでの寸法Sより小径にしてもよく、この場合、中央部の凹溝23bの寸法が変更される。
【0018】
また、上記実施の形態では、つば付外輪10の外径面に凹溝23a,23b,23cを形成してこれをオイルエア流通路とした場合を例に採ったが、必ずしもこれに限定する必要はなく、例えば、図7に示すように、チョック9の内径面に凹溝23a,23b,23cを形成してオイルエア流通路としてもよい。
更に、上記実施の形態では、凹溝23a,23b,23cを全周溝としているが、必ずしもこのようにする必要はなく、各オイルエア流出路25a,25b,25cから吐出するオイルを外輪つば面及び軌道面の周方向全周に均等量供給することができる限りにおいて円弧状の周溝であってもよい。
【0019】
更に、上記実施の形態では、つば付外輪10の外径面に3本の凹溝を設けた場合を例に採ったが、これに限定されず、凹溝を2本或いは4本以上設けてもよい。
更に、上記実施の形態では、オイルエア供給路20を1本とした場合を例に採ったが、これに限定されず、オイルエア供給路20を2本或いはそれ以上設けてもよい。
【0020】
【発明の効果】
上記の説明から明らかなように、本発明では、つば付外輪の外径面に複数のオイルエア流通路を形成すると共に、各オイルエア流通路にオイルエア分配路を介して略等量のオイルエアを分配供給し、更に各オイルエア流通路に分配供給されたオイルエアを各オイルエア流通路毎に互いに周方向に位相をずらして設けられた複数のオイルエア流出路から外輪つば面に吐出するようにしているので、各オイルエア流出路から吐出するオイルを外輪つば面及び軌道面の周方向全周に均等量供給することができ、この結果、スラスト軸受の十分な潤滑が可能になって該軸受の焼き付きやかじり等のトラブルを解消することができるという効果が得られる。
【図面の簡単な説明】
【図1】本発明の実施の形態の一例であるオイルエア潤滑構造を説明するための説明的断面図である。
【図2】図1の部分拡大図である。
【図3】図2のA矢視図である。
【図4】つば付き外輪の断面図である。
【図5】図4の右側面図である。
【図6】オイルエア潤滑構造を詳述するための説明的断面図である。
【図7】オイルエア流通路の変形例を説明するための説明的断面図である。
【符号の説明】
2…ロール(軸)
8…内輪
7…スラスト円すいころ軸受
9…チョック(ハウジング)
10…つば付き外輪
11…円すいころ
20…オイルエア供給路
22…テーパ穴(オイルエア分配路)
23a〜23c…凹溝(オイルエア流通路)
25a〜25c…オイルエア流出路
26…外輪つば
27…逃げ部
[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a roller is rotatably provided between an inner ring fitted on a shaft and a flanged outer ring fitted on a housing, and a thrust bearing that supports the shaft in the axial direction is lubricated with oil air. Concerning structure.
[0002]
[Prior art]
As this type of conventional oil-air lubrication structure, for example, those described in West German Patent DE 2844995, Japanese Patent Laid-Open No. 5-340499 and Japanese Utility Model Laid-Open No. 4-52618 are known. For example, when lubricating a plurality of rolling bearings supporting the shaft end of a rolling mill roll, oil air (compressed air and oil) supplied to one oil air supply path is distributed through the supply path. It is distributed by a vessel and supplied to each rolling bearing.
[0003]
[Problems to be solved by the invention]
By the way, oil-air lubrication conveys oil along the wall of the oil supply passage to the lubrication symmetrical object by air pressure, and simplifies the equipment and prevents external oil leakage compared to lubrication by jet oil supply. There is no need to worry, and it has the advantage that the amount of oil used can be extremely reduced. On the other hand, since the amount of oil used is small, especially in the lubrication of a thrust bearing with a collar, it is evenly distributed in the circumferential direction of the outer ring collar. It is necessary to supply oil.
[0004]
However, in each of the conventional oil-air lubrication structures described above, the oil-air distributed by the distributor is only supplied to each rolling bearing, so that the oil is evenly distributed in the circumferential direction of the outer ring collar of the thrust bearing. Cannot be supplied, and the thrust bearing cannot be sufficiently lubricated.
The present invention has been made in order to eliminate such inconveniences, and to provide sufficient lubrication of the thrust bearing so that oil can be uniformly supplied to the entire circumference of the outer ring collar of the thrust bearing. It is an object to provide an oil-air lubrication structure capable of
[0005]
[Means for Solving the Problems]
In order to achieve such an object, an oil-air lubrication structure according to the present invention includes a roller that is rotatably disposed between an inner ring that is fitted on a shaft and an outer ring that is fitted on a housing. The thrust bearing that supports the shaft in the axial direction is lubricated with oil air, and is provided between an oil air supply passage formed in the housing and an outer diameter surface of the outer ring and an inner diameter surface of the housing that faces the outer diameter surface. A plurality of oil-air flow passages that are spaced apart from each other in the axial direction and extend along the circumferential direction of the outer ring, and are formed between the plurality of oil-air flow passages and the oil-air supply passage. An oil / air distribution path for distributing and supplying the oil air supplied to the supply path to each of the plurality of oil / air flow paths so as to be substantially equal to each other, and the outer ring are perforated for each of the plurality of oil / air flow paths. A plurality of oil air outflow passages having one end communicating with the flow passage and having the other end opened at a relief portion of the collar of the outer ring and individually guiding the oil air distributed and supplied to the plurality of oil air flow passages to the escape portion; And the plurality of oil-air outflow passages are arranged with their phases shifted in the circumferential direction of the outer ring.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to FIGS. 1 is an explanatory cross-sectional view for explaining an oil-air lubrication structure as an example of an embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a view taken in the direction of arrow A in FIG. FIG. 5 is a right side view of FIG. 4.
[0007]
In FIG. 1, reference numeral 1 denotes four rows of cylindrical roller bearings (radial bearings) that rotatably support the shaft end of a roll 2 for a rolling mill. The cylindrical roller bearing 1 includes an inner ring 3 that is externally fitted to the roll 2. Cylindrical rollers 6 are rotatably arranged between the outer ring 5 fitted in the chock 4 and receive the radial load of the roll 2. Reference numeral 7 denotes a thrust tapered roller bearing that rotatably supports the shaft end of the roll 2 on the left side of the cylindrical roller bearing 1. The thrust tapered roller bearing 7 includes an inner ring 8 and a chock 9 that are fitted on the roll 2. A tapered roller 11 is movably disposed between a pair of flanged outer rings 10 that are fitted inside, and receives an axial load of the roll 2. Reference numerals 12 and 13 both indicate a spacer.
[0008]
The chock 4 in which the cylindrical roller bearing 1 is incorporated and the chock 9 in which the thrust tapered roller bearing 7 is incorporated are integrally coupled by bolts or the like, and an oil air supply path 14 through which oil air is supplied to the chock 4 is axial. Is drilled along. Four branch paths 15a to 15d extending inward in the radial direction from the oil / air supply path 14 are drilled in the axial direction of the oil / air supply path 14, and radially outward from the oil / air supply path 14 upstream of the branch path 15a. After extending in the direction, a branch path 15e extending in the axial direction and opening to the outside is formed.
[0009]
Cartridge type distributors 16a to 16c and 16e are disposed at positions corresponding to the branch paths 15a to 15c and 15e of the oil air supply path 14, respectively. Therefore, the oil air supplied to the oil air supply path 14 is After being distributed by the distributor 16e and flowing into the branch path 15e, it is guided to a connecting pipe 18 having one end connected to the opening 17 of the branch path 15e. The oil air that has passed through the distributor 16e is distributed by the distributors 16a to 16c and flows into the branch paths 15a to 15c, respectively, and thereafter supplied between the adjacent cylindrical rollers 6 of the cylindrical roller bearing 1, thereby the cylindrical rollers. Oil-air lubrication of the bearing 1 is performed. The oil air that has passed through the distributor 16c flows into the branch passage 15d, and then is guided to the oil seal lip portion 19 disposed on the right side of the cylindrical roller bearing 1 and supplied to the lip portion 19, thereby the lip portion. 19 lubrication is performed.
[0010]
The chock 9 in which the thrust tapered roller bearing 7 is incorporated is provided with an oil / air supply path 20 through which the oil / air is supplied through the connecting pipe 18 described above. As shown in FIG. 2, the oil / air supply path 20 includes a main flow path 20a extending along the axial direction in the wall portion of the chock 9 and extends radially outward from the main flow path 20a. An inflow passage 20b is formed in the outer peripheral surface of the inflow passage 20b. The other end of the connecting pipe 18 is connected to the opening of the inflow path 20 b, whereby oil air is supplied to the oil air supply path 20. Branch passages 20c and 20d extending radially inward from the main flow passage 20a on the downstream side of the inflow passage 20b are bored apart from each other in the axial direction of the main flow passage 20a. The front ends are directed to the outer diameter surfaces of the pair of flanged outer rings 10.
[0011]
Further, a cartridge type distributor 21 is disposed at a position corresponding to the branch path 20c of the main flow path 20a. Therefore, oil air flowing into the main flow path 20a from the inflow path 20b is distributed by the distributor 21. The oil air that has been guided to the branch path 20c and passed through the distributor 21 flows toward the downstream side of the main flow path 20a, and is then guided to the branch path 20d. At each downstream end of the branch passages 20c, 20d, tapered holes (oil-air distribution passages) 22 that are gradually expanded inward in the radial direction and opened to the inner diameter surface of the chock 9 are formed, respectively. The final end of the tapered hole 22 covers the outer diameter surface of the flanged outer ring 10.
[0012]
Three concave grooves (oil-air flow passages) 23a, 23b, and 23c that are spaced apart from each other in the axial direction are formed on the outer diameter surface of the outer ring 10 with a collar along the entire circumference in the circumferential direction. As shown in FIG. 3, the dimension S from the concave groove 23a to the concave groove 23c is the same as the diameter of the final end of the tapered hole 22, and the final end covers the three concave grooves 23a, 23b, and 23c. Has been. Here, the length of the peripheral edge portion 22a at the end of the tapered hole 22 facing the three concave grooves 23a, 23b, and 23c is set to be substantially the same in the concave grooves 23a, 23b, and 23c. That is, L 1 (length of the peripheral portion 22a facing the concave groove 23a) = 2L 2 (length of the peripheral portion 22a facing the concave groove 23b) = L 3 (length of the peripheral portion 22a facing the concave groove 23c) Thus, the width of each concave groove 23a, 23b, 23c is determined. Thereby, the oil conveyed while forming a predetermined oil film thickness along the inner diameter surface of the taper hole 22 by the air pressure can be distributed and supplied to each of the concave grooves 23a, 23b, 23c in an equal amount. On both sides of the concave grooves 23a, 23b, and 23c, O-rings 24 that prevent oil-air leakage are provided.
[0013]
One end of each of the oil / air outflow passages 25a, 25b, and 25c communicates with the bottom of each of the concave grooves 23a, 23b, and 23c. As shown in FIGS. 2 and 4, the oil / air supply passages 25a, 25b, and 25c extend radially inwardly in the flanged outer ring 10 and then bend 90 ° to extend along the axial direction. Is open to the escape portion 27 of the outer ring collar 26. As a result, the oil air distributed and supplied to the concave grooves 23a, 23b, and 23c is individually guided to the escape portion 27.
[0014]
In this embodiment, as shown in FIG. 5, oil-air outflow passages 25a, 25b, and 25c are provided at a total of 12 at 90 ° pitch in the circumferential direction of the flanged outer ring 10, and the oil-air outflow The paths 25 a, 25 b, 25 c are arranged with a phase shift of 30 ° in the circumferential direction of the flanged outer ring 10. Thereby, the oil discharged from each other end opening of the oil air outflow passages 25a, 25b, 25c can be supplied in an equal amount to the entire circumference in the circumferential direction of the outer ring collar surface and the raceway surface.
[0015]
More specifically, as shown in FIG. 6, only one concave groove 23 is formed on the outer diameter surface of the flanged outer ring 10, and oil air supplied to the concave groove 23 is provided at equal intervals in the circumferential direction. When the oil is discharged from the plurality of oil air outflow paths 25, the oil air supplied to the concave grooves 23 is unevenly distributed in the concave grooves 23 due to the influence of gravity. The amount of oil varies, and the oil cannot be supplied in an equal amount to the entire circumference of the outer ring collar surface and the raceway surface.
[0016]
In contrast, in this embodiment, three concave grooves 23a, 23b, and 23c are formed on the outer diameter surface of the flanged outer ring 10, and the concave grooves 23a, 23b, and 23c are formed through the tapered holes 22 and the like. An amount of oil air is distributed and supplied, and the oil air distributed and supplied to the concave grooves 23a, 23b, and 23c is discharged from a plurality of oil air outflow passages 25a, 25b, and 25c provided at equal intervals in the circumferential direction with the phases shifted from each other. Therefore, as described above, the oil discharged from the oil air outflow passages 25a, 25b, and 25c can be supplied in an equal amount to the entire circumference of the outer ring collar surface and the raceway surface. As a result, the thrust cone The roller bearing 8 can be sufficiently lubricated, and troubles such as seizure and galling of the bearing 8 can be solved.
[0017]
In the above embodiment, the case where the dimension S from the concave groove 23a to the concave groove 23c is the same as the hole diameter of the final end of the tapered hole 22 is taken as an example, but this is not necessarily required. For example, as shown by a two-dot chain line in FIG. 3, the diameter of the final end of the tapered hole 22 may be smaller than the dimension S from the concave groove 23a to the concave groove 23c. The dimensions of are changed.
[0018]
Further, in the above embodiment, the case where the grooves 23a, 23b, 23c are formed on the outer diameter surface of the flanged outer ring 10 and this is used as the oil-air flow passage is taken as an example, but it is not necessarily limited to this. Instead, for example, as shown in FIG. 7, grooves 23 a, 23 b, and 23 c may be formed on the inner diameter surface of the chock 9 to form an oil-air flow path.
Furthermore, in the above-described embodiment, the concave grooves 23a, 23b, and 23c are all-round grooves. However, it is not always necessary to do this, and the oil discharged from the oil / air outflow passages 25a, 25b, and 25c is supplied to the outer ring collar surface and An arcuate circumferential groove may be used as long as an equal amount can be supplied to the entire circumference of the raceway surface.
[0019]
Furthermore, in the above-described embodiment, the case where three concave grooves are provided on the outer diameter surface of the flanged outer ring 10 is taken as an example. However, the present invention is not limited to this, and two or four or more concave grooves are provided. Also good.
Furthermore, although the case where the number of the oil / air supply paths 20 is one is taken as an example in the above embodiment, the present invention is not limited to this, and two or more oil / air supply paths 20 may be provided.
[0020]
【The invention's effect】
As is apparent from the above description, in the present invention, a plurality of oil / air flow passages are formed on the outer diameter surface of the flanged outer ring, and a substantially equal amount of oil / air is distributed and supplied to each oil / air flow passage via the oil / air distribution passage. In addition, the oil air distributed and supplied to each oil air flow passage is discharged from the plurality of oil air outflow passages provided to each oil air flow passage with the phases shifted in the circumferential direction to the outer ring flange surface. The oil discharged from the oil-air outflow passage can be supplied in an equal amount to the entire circumference of the outer ring collar surface and the raceway surface. As a result, the thrust bearing can be sufficiently lubricated to prevent seizure, galling, etc. The effect that the trouble can be solved is obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory sectional view for explaining an oil-air lubrication structure as an example of an embodiment of the present invention.
FIG. 2 is a partially enlarged view of FIG.
FIG. 3 is a view on arrow A in FIG. 2;
FIG. 4 is a cross-sectional view of a flanged outer ring.
FIG. 5 is a right side view of FIG. 4;
FIG. 6 is an explanatory sectional view for explaining the oil-air lubrication structure in detail.
FIG. 7 is an explanatory cross-sectional view for explaining a modified example of the oil / air flow passage.
[Explanation of symbols]
2. Roll (shaft)
8 ... Inner ring 7 ... Thrust tapered roller bearing 9 ... Chock (housing)
10 ... Outer ring with collar 11 ... Tapered roller 20 ... Oil / air supply path 22 ... Tapered hole (oil / air distribution path)
23a-23c ... concave groove (oil-air flow passage)
25a-25c ... Oil-air outflow passage 26 ... Outer ring collar 27 ... Escape portion

Claims (1)

軸に外嵌された内輪とハウジングに内嵌されたつば付き外輪との間にころを転動自在に配設して前記軸を軸方向に支持するスラスト軸受をオイルエアで潤滑する構造であって、
前記ハウジングに穿設されたオイルエア供給路と、
前記外輪の外径面と該外径面を臨むハウジングの内径面との間に軸方向に互いに離間して複数配置され、前記外輪の周方向に沿って延設されたオイルエア流通路と、
該複数のオイルエア流通路と前記オイルエア供給路との間に穿設され、該オイルエア供給路に供給されたオイルエアを前記複数のオイルエア流通路にそれぞれ略等量となるように分配供給するオイルエア分配路と、
前記外輪に前記複数のオイルエア流通路毎に穿設され、該オイルエア流通路に一端部が連通すると共に前記外輪のつばの逃げ部に他端部が開口して前記複数のオイルエア流通路に分配供給されたオイルエアを前記逃げ部に個別に導く複数のオイルエア流出路とを備え、
該複数のオイルエア流出路を前記外輪の周方向に位相をずらして配置したことを特徴とするオイルエア潤滑構造。
A roller bearing is rotatably provided between an inner ring fitted on the shaft and a flanged outer ring fitted on the housing, and a thrust bearing that supports the shaft in the axial direction is lubricated with oil air. ,
An oil / air supply path formed in the housing;
An oil-air flow passage that is arranged between the outer diameter surface of the outer ring and the inner diameter surface of the housing facing the outer diameter surface, spaced apart from each other in the axial direction and extending along the circumferential direction of the outer ring;
An oil / air distribution path that is perforated between the plurality of oil / air flow paths and the oil / air supply path, and distributes the oil air supplied to the oil / air supply paths to each of the plurality of oil / air flow paths so as to be substantially equal to each other. When,
The outer ring is perforated for each of the plurality of oil / air flow passages, and one end portion thereof communicates with the oil / air flow passage, and the other end portion opens at a relief portion of the collar of the outer ring, and is distributed and supplied to the plurality of oil / air flow passages. A plurality of oil-air outflow passages for individually guiding the oil-air to the escape portion,
An oil / air lubrication structure in which the plurality of oil / air outflow paths are arranged with a phase shifted in a circumferential direction of the outer ring.
JP33901495A 1995-12-26 1995-12-26 Oil-air lubrication structure Expired - Lifetime JP3702517B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP33901495A JP3702517B2 (en) 1995-12-26 1995-12-26 Oil-air lubrication structure

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JPH09178085A JPH09178085A (en) 1997-07-11
JP3702517B2 true JP3702517B2 (en) 2005-10-05

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Publication number Priority date Publication date Assignee Title
CN100415398C (en) * 2006-05-23 2008-09-03 唐明 Bearing serial roll system structure for rolling mill
CN105217424B (en) * 2015-10-16 2017-06-27 浙江西尔康电梯部件有限公司 Elevator traction machine
CN109296921B (en) * 2018-11-26 2023-09-15 烟台华顺机械工程设备有限公司 Oil gas distributor with built-in bearing seat

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