JP3663658B2 - Bearing oil leakage prevention device for vertical rotating machine - Google Patents

Bearing oil leakage prevention device for vertical rotating machine Download PDF

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Publication number
JP3663658B2
JP3663658B2 JP07302195A JP7302195A JP3663658B2 JP 3663658 B2 JP3663658 B2 JP 3663658B2 JP 07302195 A JP07302195 A JP 07302195A JP 7302195 A JP7302195 A JP 7302195A JP 3663658 B2 JP3663658 B2 JP 3663658B2
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oil
cylindrical portion
inner cylinder
bearing
vertical rotating
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JPH08270891A (en
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久雄 後藤
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/30—Application independent of particular apparatuses related to direction with respect to gravity
    • F16C2300/34—Vertical, e.g. bearings for supporting a vertical shaft

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  • Sliding-Contact Bearings (AREA)

Description

【０００１】
【産業上の利用分野】
この発明は、立形回転機の軸受装置の油槽の内筒上部を越えて、外部に潤滑油が洩れることを防止する立形回転機の軸受油洩れ防止装置に関する。
【０００２】
【従来の技術】
図９は従来の立形回転機の軸受油洩れ防止装置を示す一部縦断面図である。図において、１は立形回転機の立軸の回転軸、２はこの空間軸に形成されたランナー、２ａはこのランナーに形成され回転軸１と所定の空間を有して軸下方に延びる筒状部、３はこの筒状部の外周を油膜を介して支持することにより回転軸１のラジアル荷重を回転可能に支承する案内軸受である。
【０００３】
４はこの案内軸受を支え部品（図示しない）にて支え、案内軸受３と筒状部２ａとを浸す潤滑油５を収容する油槽であり、底板４ａと、この底板４ａから回転軸１と筒状部２ａとの空間に突出した内筒４ｂと、外筒４ｃと、上板４ｄとにより構成されている。４ｂ１は内筒４ｂの上端面を外周面側が低くなるように傾斜させた傾斜部、５は油槽４内に収容され案内軸受３と筒状部２ａとの回転摺動部の微小隙間に油膜を形成するための潤滑油である。
【０００４】
次に動作について説明する。図９における白抜き矢印は潤滑油５の油槽４内における静止時の油面状態を示している。立形回転機が運転を開始すると、回転軸１が回転してこの回転軸に形成された筒状部２ａも同じ回転速度で回転することになり、この筒状部２ａの回転により油槽４内の潤滑油５はかき回され、特に、筒状部２ａと内筒４ｂとの間にある潤滑油５の油面は静止状態から回転速度の上昇にしたがってしだいに激しい不規則な上下運動（波立ち現象）を引き起こす。図１０はこの回転中における油面の状態を示したものであり、黒塗矢印のように潤滑油５の油面は激しい不規則な上下運動を呈し、潤滑油５の表面部が飛沫油ａとなって飛びはねる。この飛びはねた飛沫油ａの中には内筒４ｂの上端面にまで達するものがあるが、この上端面を傾斜部４ｂ１とすることにより油槽４内に回収できるようになっている。
【０００５】
【発明が解決しようとする課題】
従来の立形回転機の軸受油洩れ防止装置は以上のように構成されているので、潤滑油５が油槽４外へ洩れることは殆んどない。しかし時として、例えば定格回転速度近傍の高速運転時において、潤滑油５の飛沫の一部が傾斜部４ｂ１を飛び越えることがあり、内筒４ｂの内周面および回転軸１の外周面に沿って潤滑油５が機器の外部へ洩れることがあった。
【０００６】
この発明は上記のような問題点を解消するためになされたもので、潤滑油が機器の外部へ洩れることを確実に防止できる立形回転機の軸受油洩れ防止装置を得ることを目的とする。
【０００７】
【課題を解決するための手段】
この発明に係る立形回転機の軸受油洩れ防止装置は、油槽の内筒の上端部外側に、上端がこの内筒の傾斜部より上方に突出して取り付けられた円環と、この円環に内筒の傾斜部側から油槽側に貫通する油戻し穴を設けたものである。
【０００８】
また、内筒の外周面に、その上端が油面より高く筒状部の内周面との間が微小隙間となるように形成したバッフルリングを設けたものである。
【０００９】
さらに、バッフルリングの下端を筒状部の下端より下方に突出させるものとした。
【００１０】
さらにまた、バッフルリングにその下端面と筒状部内周面とが対面するように貫通した油戻し穴を設けたものとした。
【００１１】
なおまた、筒状部の下端を案内軸受の下端より下方に突出させ、この突出部に内周面から外周面に向かって貫通する穴を設けたものとした。
【００１２】
なおまた、筒状部の突出部下端面に内周側から外周側に向かう溝を設けたものである。
【００１３】
【作用】
この発明における立形回転機の軸受油洩れ防止装置は、油槽の内筒の上端部外側に設けた円環が飛沫油の乗り越えを防止し、万一乗り越えても円環に設けられた油戻し穴を経由して油槽側へ回収される。
【００１４】
また、上端を油面より高く筒状部の内周面との間を微小とするバッフルリングは潤滑油の油面の飛びはねる面積を小さくし、運転中の油面の上下運動を抑制して飛沫油の発生を抑制する。
【００１５】
さらに、バッフルリングの下端を筒状部の下端より下方に突出させたから潤滑油は筒状部下端面の内外径の差にもとづくポンプ作用により、バッフルリングと筒状部との間にある潤滑油の油面を下げる。
【００１６】
さらにまた、バッフルリングにその下端面と筒状部内周面とが対面するように貫通した油戻し穴を設けたことにより、潤滑油がバッフルリングの下端面側から油戻し穴を経由してバッフルリングの外周面に向って流れ、さらにバッフルリング外周面と筒状部内周側との隙間を通り、筒状部下端面の内周側から外周側に向って流れるポンプ作用により、バッフルリングと筒状部内周側との隙間にある潤滑油の油面を下げ、かつ、油の入れ換わりが良くなることにより油温の上昇を防止出来る。
【００１７】
また、筒状部の下端を案内軸受の下端より下方に突出させ、この突出部に内周面から外周面に向かって貫通する穴を設けたから、この穴の中に溜った潤滑油は筒状部遠心力により筒状部の内周側から外周側に向って流れるポンプ作用により、油槽の内筒と筒状部内周側との間にある潤滑油の油面を下げる。
【００１８】
なおまた、筒状部下端の突出部下端面に内周側から外周側に向かう溝を設けたから、この溝に溜った潤滑油は筒状部の遠心力により筒状部の内周側から外周側に向って流れるポンプ作用により、油槽の内筒と筒状部内周側との間にある潤滑油の油面を下げる。
【００１９】
【実施例】
実施例１．
図１はこの発明の一実施例を示す立形回転機の軸受油洩れ防止装置の一部断面図である。図において、１〜５は上述した従来の立形回転機の軸受油洩れ防止装置と同一であるので、その説明は省略する。６は上記油槽４の内筒４ｂの上端部外側に上端が傾斜部４ｂ１より上方に突出して取り付けられた円環、７はこの円環に設けられている傾斜部４ｂ１側から油槽４側に貫通する油戻し穴である。図２は図１の円環６を矢示Ｂ方向に見た図である。
【００２０】
次に動作について説明する。図３は高速運動時の図１の油面の状態を示す部分図であり、図示のように潤滑油５の油面は激しい不規則な上下運動により、その一部が飛沫油ａとなって、傾斜部４ｂ１に向かって飛び散っていくが、傾斜部４ｂ１まで到達する以前に内筒４ｂに取り付けた円環６でさえぎられ、潤滑油５はこの傾斜部４ｂ１を乗り越えて機器の外部へ洩れることがない。
【００２１】
万一、飛沫油ａの一部が円環６を乗り越えて、傾斜部４ｂ１に付着することがあっても、この傾斜部４ｂ１に溜った潤滑油５は円環６に設けた油戻し穴７から油槽４側に向かって流れるので、潤滑油５を油槽４内に回収できる。この実施例では油戻し穴７の穴の形状を四角形とし複数個設けるものとしたが、穴の形状は四角形でなくともよく、また少なくとも１個あればよい。
【００２２】
実施例２．
図４はこの発明の他の実施例を示す一部断面図であり、図において８は内筒４ｂの外周面に設けられ、上端が潤滑油５の油面よりも高く、かつ筒状部２ａの内周面との間隙が微小となるように形成されたバッフルリングである。図示のとおりこのバッフルリングの下端８ａは筒状部２ａの下端より下方に突出されている。
【００２３】
この実施例によれば、バッフルリング８が内筒４ｂと筒状部２ａの内周側との空間の潤滑油５の油面をほぼ覆っているので、潤滑油５の油の飛びはねる面積が小さくなり、潤滑油５の飛散を抑制することができる。また、バッフルリング８の外周面と筒状部２ａの内周面との間を微小隙間にすることにより、筒状部２ａの内周側上部に向う油面上昇を抑制し、筒状部２ａの下端面の内外径の差にもとづく遠心力の差により矢印方向に流れるポンプ作用によって上記バッフルリング８と筒状部２ａの内周側との間の油面を下げる。
したがって、飛沫油ａの発生を抑制するとともに、油面の上昇を抑制するので飛沫が傾斜部４ｂ１まで到達しないので機器の外部への油洩れを防止できる。
【００２４】
さらに、バッフルリング８の下端８ａを筒状部２ａの下端より下方に突出させることにより、バッフルリング８の外周面と筒状部２ａの内周側との隙間に内筒４ｂの側から油が流入するのを防ぐことになり、さらに効果的に油面を下げることができる。
なおこの実施例でも内筒４ｂの上端に傾斜部４ｂ１を設けるものとしているが、バッフルリング８を設けることにより飛沫油が内筒４ｂの上端にまで至ることがなくなるので、強いて傾斜部４ｂ１を設ける必要はない。
【００２５】
実施例３．
図５はこの発明のさらに他の実施例を示す一部縦断面図であり、図４におけるバッフルリング８に、その下端面とライナー２の筒状部２ａ内周面とが対面するように貫通した油戻し穴９を設けるものとした。このように構成することにより、油槽４内の潤滑油５はこの油戻し穴９のバッフルリング８の底面８ａの側から筒状部２ａの内周側を通り、上記バッフルリング８の外周面と筒状部２ａ内周側との隙間を通って、筒状部２ａの下端面に流れ込む矢印方向のポンプ作用が加わるので、相乗効果により図４の実施例に比べてさらに大きなポンプ作用を生じて加速され、一層効果的に油面を下げることができる。また、油の滞留が少なくなるのでこの部分の油の温度上昇を少なくすることが出来る。
【００２６】
実施例４．
また、図６はこの発明のさらに他の実施例を示す一部縦断面図であり、１０は筒状部２ａの下端に形成された案内軸受３の下端より下方に突出させた突出部、１１はこの突出部に設けられた内周面から外周面に向かって貫通する穴である。このように構成することにより、運転中穴１１内の潤滑油５は遠心力により上記筒状部２ａの内周側から外周側へ矢印方向の流れが生じるポンプ作用によって、油槽４の内筒４ｂと筒状部２ａとの間にある潤滑油５の油面が静止時の油面の状態を示す白抜き矢印から運転時の油面の状態を示す黒塗矢印となって油面を下げることができるので、飛沫油ａが傾斜部４ｂ１まで到達することがなく、したがって機器の外部への油洩れを防止することができる。
【００２７】
実施例５．
図７はこの発明のさらに他の実施例を示す一部縦断面図であり、図６における突出部１０に、その内周面から外周面に向かって貫通する溝１２を設けるものとした。図８は図７の突出部１０を矢示Ｃ方向に見た図である。このように構成することにより、図６に示す実施例と同様に、運転中の溝１２内の潤滑油５は遠心力により筒状部２ａの内周側から外周側へ矢印方向の流れが生じるポンプ作用によって、油槽の内筒４ｂと筒状部２ａとの間にある潤滑油５の油面が静止時の油面の状態を示す白抜き矢印から運転時の油面の状態を示す黒塗矢印となって油面を下げることができるので飛沫油は傾斜部４ｂ１まで到達せず機器の外部への油洩れを防止できる。
【００２８】
【発明の効果】
以上のように、この発明によれば傾斜部をもつ油槽の内筒の上端部外側に、上端が傾斜部より上方に突出させた円環を取り付け、この円環に内筒の傾斜部側から油槽側に貫通する油戻し穴を設けたので、潤滑油は傾斜部に到達せず機器の外部への油洩れを防止でき、万一傾斜部に付着したとしても油槽内に確実に回収できる。
【００２９】
また、油槽の内筒の外周面に、上端が上記潤滑油の油面より高く、かつ筒状部の内周面との間隙を微小とするバッフルリングを設けたので、潤滑油の飛沫油の発生を抑制でき、かつ油槽の内筒と筒状部との間の油面を下げることができるので、潤滑油が内筒上端まで到達せず機器の外部への油洩れを防止できる。
【００３０】
さらに、バッフルリングの下端を筒状部の下端より下方に突出させたので、内筒と筒状部の間の油面をさらに下げることができ、潤滑油が内筒上端まで到達せず機器の外部への油洩れを防止できる。
【００３１】
さらにまた、バッフルリングに、その下端面と筒状部内周面とが対面するように貫通した油戻し穴を設けたので、内筒と筒状部との間の油面をさらに効果的に下げることができ、潤滑油が内筒上端まで到達できず機器の外部への油洩れを防止できる。また、油の滞留を減らし油温の上昇を減らすことができる。
【００３２】
また、ランナーの筒状部の下端に案内軸受の下端より下方に突出した突出部を設け、この突出部に内周面から外周面に向かって貫通する穴を設けたので潤滑油が内筒上端まで到達せず機器の外部への油洩れを防止できる。
【００３３】
なおまた、ランナーの筒状部の下端に設けられた突出部の下端面に内周側から外周側に向かう溝を設けたので潤滑油が内筒上端まで到達せず機器の外部への油洩れを防止できる。
【図面の簡単な説明】
【図１】 この発明に係る立形回転機の軸受油洩れ防止装置の一実施例を示す一部縦断面図である。
【図２】 図１に示す立形回転機の軸受油洩れ防止装置を矢示Ｂ方向に見た一部正面図である。
【図３】 図１に示す立形回転機の軸受油洩れ防止装置の運転中の油面の状態を示す部分図である。
【図４】 この発明に係る立形回転機の軸受油洩れ防止装置の他の実施例を示す一部縦断面図である。
【図５】 この発明に係る立形回転機の軸受油洩れ防止装置の他の実施例を示す一部縦断面図である。
【図６】 この発明に係る立形回転機の軸受油洩れ防止装置の他の実施例を示す一部縦断面図である。
【図７】 この発明に係る立形回転機の軸受油洩れ防止装置の他の実施例を示す一部縦断面図である。
【図８】 図７に示す立形回転機の軸受油洩れ防止装置を矢示Ｃ方向に見た一部正面図である。
【図９】 従来の立形回転機の軸受油洩れ防止装置を示す一部縦断面図である。
【図１０】 図９に示す立形回転機の軸受油洩れ防止装置の運転中の油面の状態を示す部分図である。
【符号の説明】
１ 回転軸 ２ ランナー ２ａ 筒状部
３ 案内軸受 ４ 油槽 ４ｂ 内筒
４ｂ１ 傾斜部 ６ 円環 ７ 油戻し穴
８ バッフルリング ９ 油戻し穴 １０ 突出部
１１ 穴 １２ 溝[0001]
[Industrial application fields]
The present invention relates to a bearing oil leakage prevention device for a vertical rotating machine that prevents the lubricating oil from leaking outside beyond the upper portion of the inner cylinder of the oil tank of the bearing device of the vertical rotating machine.
[0002]
[Prior art]
FIG. 9 is a partial longitudinal sectional view showing a bearing oil leakage prevention device of a conventional vertical rotating machine. In the figure, 1 is a rotating shaft of a vertical shaft of a vertical rotating machine, 2 is a runner formed on the space axis, 2a is a cylindrical shape formed on the runner and having a predetermined space with the rotating shaft 1 and extending downward. Reference numerals 3 and 3 denote guide bearings that rotatably support the radial load of the rotary shaft 1 by supporting the outer periphery of the cylindrical portion via an oil film.
[0003]
Reference numeral 4 denotes an oil tank that supports the guide bearing with support parts (not shown) and accommodates lubricating oil 5 that immerses the guide bearing 3 and the cylindrical portion 2a. The bottom plate 4a, and the rotating shaft 1 and the cylinder from the bottom plate 4a. It is comprised by the inner cylinder 4b which protruded in the space with the shape part 2a, the outer cylinder 4c, and the upper board 4d. 4b1 is an inclined portion in which the upper end surface of the inner cylinder 4b is inclined so that the outer peripheral surface side is lowered, and 5 is housed in the oil tank 4, and an oil film is formed in a minute gap of the rotational sliding portion between the guide bearing 3 and the cylindrical portion 2a. It is a lubricating oil for forming.
[0004]
Next, the operation will be described. The white arrow in FIG. 9 indicates the oil level state when the lubricating oil 5 is stationary in the oil tank 4. When the vertical rotating machine starts operation, the rotating shaft 1 rotates and the cylindrical portion 2a formed on the rotating shaft also rotates at the same rotational speed. The rotation of the cylindrical portion 2a causes the oil tank 4 to move inside. In particular, the oil surface of the lubricating oil 5 between the cylindrical portion 2a and the inner cylinder 4b gradually becomes violently irregular up-and-down motion (ripple phenomenon) as the rotational speed increases from a stationary state. )cause. FIG. 10 shows the state of the oil surface during the rotation. The oil surface of the lubricating oil 5 exhibits a violent and irregular vertical movement as indicated by the black arrow, and the surface portion of the lubricating oil 5 is splashed oil a. And then jump. Some of the splashed splash oil a reaches the upper end surface of the inner cylinder 4b. By making the upper end surface an inclined portion 4b1, the oil tank 4 can be recovered.
[0005]
[Problems to be solved by the invention]
Since the conventional bearing oil leakage prevention device of the vertical rotating machine is configured as described above, the lubricating oil 5 hardly leaks out of the oil tank 4. However, sometimes, for example, at the time of high speed operation near the rated rotational speed, a part of the splash of the lubricating oil 5 may jump over the inclined portion 4b1, and along the inner peripheral surface of the inner cylinder 4b and the outer peripheral surface of the rotary shaft 1. Lubricating oil 5 sometimes leaked outside the equipment.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a bearing oil leakage prevention device for a vertical rotary machine that can reliably prevent the lubricating oil from leaking outside the device. .
[0007]
[Means for Solving the Problems]
A bearing oil leakage prevention device for a vertical rotating machine according to the present invention includes an annular ring mounted on an outer side of an upper end portion of an inner cylinder of an oil tank so that an upper end protrudes upward from an inclined portion of the inner cylinder, and the annular ring. An oil return hole penetrating from the inclined portion side of the inner cylinder to the oil tank side is provided.
[0008]
In addition, a baffle ring is provided on the outer peripheral surface of the inner cylinder so that the upper end thereof is higher than the oil level and a minute gap is formed between the inner peripheral surface of the cylindrical portion.
[0009]
Furthermore, the lower end of the baffle ring is projected downward from the lower end of the cylindrical portion.
[0010]
Furthermore, the oil return hole which penetrated so that the lower end surface and the cylindrical part inner peripheral surface might face the baffle ring shall be provided.
[0011]
In addition, the lower end of the cylindrical portion protrudes downward from the lower end of the guide bearing, and a hole penetrating from the inner peripheral surface toward the outer peripheral surface is provided in the protruding portion.
[0012]
In addition, a groove extending from the inner peripheral side to the outer peripheral side is provided on the lower end surface of the protruding portion of the cylindrical portion.
[0013]
[Action]
In the bearing oil leakage prevention device for a vertical rotating machine according to the present invention, the ring provided on the outer side of the upper end of the inner cylinder of the oil tank prevents the splash oil from getting over, and the oil return provided in the ring even if it gets over It is collected to the oil tank side via the hole.
[0014]
In addition, the baffle ring whose upper end is higher than the oil level and minute between the inner peripheral surface of the cylindrical part reduces the splashing area of the oil surface of the lubricating oil and suppresses the vertical movement of the oil surface during operation. Suppresses the generation of splash oil.
[0015]
Furthermore, since the lower end of the baffle ring protrudes downward from the lower end of the cylindrical part, the lubricating oil is pumped based on the difference between the inner and outer diameters of the lower end surface of the cylindrical part, so that the lubricating oil between the baffle ring and the cylindrical part is removed. Lower the oil level.
[0016]
Furthermore, the baffle ring is provided with an oil return hole penetrating so that the lower end surface of the baffle faces the inner peripheral surface of the cylindrical portion, so that the lubricating oil can be passed from the lower end surface side of the baffle ring through the oil return hole. The baffle ring and the cylindrical shape are caused by a pump action that flows toward the outer peripheral surface of the ring, passes through the gap between the outer peripheral surface of the baffle ring and the inner peripheral side of the cylindrical portion, and flows from the inner peripheral side to the outer peripheral side of the lower end surface of the cylindrical portion. The oil temperature can be prevented from rising by lowering the oil level of the lubricating oil in the gap with the inner peripheral side and improving the oil replacement.
[0017]
In addition, since the lower end of the cylindrical portion protrudes downward from the lower end of the guide bearing and a hole that penetrates from the inner peripheral surface toward the outer peripheral surface is provided in the protruding portion, the lubricating oil accumulated in the hole is cylindrical. The oil level of the lubricating oil between the inner cylinder of the oil tank and the inner peripheral side of the cylindrical part is lowered by the pump action that flows from the inner peripheral side to the outer peripheral side of the cylindrical part by the partial centrifugal force.
[0018]
In addition, since a groove from the inner peripheral side to the outer peripheral side is provided on the lower end surface of the projecting part at the lower end of the cylindrical part, the lubricating oil accumulated in this groove is changed from the inner peripheral side to the outer peripheral side of the cylindrical part by the centrifugal force of the cylindrical part. The oil level of the lubricating oil existing between the inner cylinder of the oil tank and the cylindrical portion inner peripheral side is lowered by the pump action that flows toward.
[0019]
【Example】
Example 1.
FIG. 1 is a partial cross-sectional view of a bearing oil leakage prevention device for a vertical rotating machine showing an embodiment of the present invention. In the figure, 1 to 5 are the same as the bearing oil leakage prevention device of the conventional vertical rotary machine described above, and the description thereof is omitted. Reference numeral 6 denotes an annular ring mounted on the outer side of the upper end of the inner cylinder 4b of the oil tank 4 so that the upper end protrudes upward from the inclined part 4b1, and 7 penetrates from the inclined part 4b1 provided on the annular ring to the oil tank 4 side. It is an oil return hole. FIG. 2 is a view of the ring 6 of FIG.
[0020]
Next, the operation will be described. FIG. 3 is a partial view showing the state of the oil surface of FIG. 1 during high-speed movement. As shown in the drawing, the oil surface of the lubricating oil 5 is partly splashed oil a due to intense irregular vertical movement. , It scatters toward the inclined portion 4b1, but is blocked by the ring 6 attached to the inner cylinder 4b before reaching the inclined portion 4b1, and the lubricating oil 5 passes over the inclined portion 4b1 and leaks outside the device. There is no.
[0021]
Even if a part of the splashed oil a gets over the annular ring 6 and adheres to the inclined part 4b1, the lubricating oil 5 accumulated in the inclined part 4b1 remains in the oil return hole 7 provided in the annular ring 6. Since it flows toward the oil tank 4 side, the lubricating oil 5 can be recovered in the oil tank 4. In this embodiment, the oil return hole 7 has a quadrangular shape, and a plurality of holes are provided. However, the shape of the hole does not have to be quadrangular, and at least one is sufficient.
[0022]
Example 2
FIG. 4 is a partial cross-sectional view showing another embodiment of the present invention. In FIG. 4, 8 is provided on the outer peripheral surface of the inner cylinder 4b, the upper end is higher than the oil surface of the lubricating oil 5, and the cylindrical portion 2a. It is a baffle ring formed so that the gap with the inner peripheral surface of the tube becomes small. As shown in the figure, the lower end 8a of the baffle ring protrudes downward from the lower end of the cylindrical portion 2a.
[0023]
According to this embodiment, since the baffle ring 8 substantially covers the oil surface of the lubricating oil 5 in the space between the inner cylinder 4b and the inner peripheral side of the cylindrical portion 2a, the area where the oil of the lubricating oil 5 splashes is reduced. It becomes small and the scattering of the lubricating oil 5 can be suppressed. Further, by making a small gap between the outer peripheral surface of the baffle ring 8 and the inner peripheral surface of the cylindrical portion 2a, the oil level rise toward the upper portion on the inner peripheral side of the cylindrical portion 2a is suppressed, and the cylindrical portion 2a. The oil level between the baffle ring 8 and the inner peripheral side of the cylindrical portion 2a is lowered by the pump action that flows in the direction of the arrow due to the difference in centrifugal force based on the difference in the inner and outer diameters of the lower end surface of the cylinder.
Accordingly, the generation of the splash oil a is suppressed, and the rise of the oil level is suppressed, so that the splash does not reach the inclined portion 4b1, so that oil leakage to the outside of the device can be prevented.
[0024]
Further, by causing the lower end 8a of the baffle ring 8 to protrude downward from the lower end of the cylindrical portion 2a, oil is introduced from the side of the inner cylinder 4b into the gap between the outer peripheral surface of the baffle ring 8 and the inner peripheral side of the cylindrical portion 2a. Inflow is prevented, and the oil level can be lowered more effectively.
In this embodiment, the inclined portion 4b1 is provided at the upper end of the inner cylinder 4b. However, the provision of the baffle ring 8 prevents the splashed oil from reaching the upper end of the inner cylinder 4b. There is no need.
[0025]
Example 3 FIG.
FIG. 5 is a partial longitudinal sectional view showing still another embodiment of the present invention. The baffle ring 8 in FIG. 4 is penetrated so that the lower end surface thereof faces the inner peripheral surface of the cylindrical portion 2a of the liner 2. The oil return hole 9 was provided. By configuring in this way, the lubricating oil 5 in the oil tank 4 passes from the bottom surface 8a side of the baffle ring 8 of the oil return hole 9 to the inner peripheral side of the cylindrical portion 2a, and the outer peripheral surface of the baffle ring 8 Since the pumping action in the direction of the arrow flowing into the lower end surface of the cylindrical part 2a through the gap with the inner peripheral side of the cylindrical part 2a is added, the synergistic effect causes a larger pumping action than the embodiment of FIG. It is accelerated and the oil level can be lowered more effectively. Further, since the oil stays less, the temperature rise of the oil in this portion can be reduced.
[0026]
Example 4
FIG. 6 is a partial longitudinal sectional view showing still another embodiment of the present invention. Reference numeral 10 denotes a protruding portion protruding downward from the lower end of the guide bearing 3 formed at the lower end of the cylindrical portion 2a. Is a hole penetrating from the inner peripheral surface to the outer peripheral surface provided in the protruding portion. With this configuration, the lubricating oil 5 in the operating hole 11 is pumped to cause the flow in the direction of the arrow from the inner peripheral side to the outer peripheral side of the cylindrical part 2a due to centrifugal force. The oil level of the lubricating oil 5 between the cylinder 2a and the cylindrical portion 2a is lowered from the white arrow indicating the oil level when stationary to a black arrow indicating the oil level during operation. Therefore, the splash oil a does not reach the inclined portion 4b1, and therefore oil leakage to the outside of the device can be prevented.
[0027]
Embodiment 5 FIG.
FIG. 7 is a partial longitudinal sectional view showing still another embodiment of the present invention. A groove 12 penetrating from the inner peripheral surface toward the outer peripheral surface is provided in the protruding portion 10 in FIG. FIG. 8 is a view of the protruding portion 10 of FIG. With this configuration, as in the embodiment shown in FIG. 6, the lubricating oil 5 in the operating groove 12 flows in the direction of the arrow from the inner peripheral side to the outer peripheral side of the cylindrical portion 2a by centrifugal force. By the pump action, the oil level of the lubricating oil 5 between the inner cylinder 4b and the cylindrical part 2a of the oil tank is black painted to indicate the oil level during operation from the white arrow indicating the oil level when stationary Since the oil level can be lowered as an arrow, the splashed oil does not reach the inclined portion 4b1 and oil leakage to the outside of the device can be prevented.
[0028]
【The invention's effect】
As described above, according to the present invention, an annular ring having an upper end protruding upward from the inclined portion is attached to the outer side of the upper end portion of the inner cylinder of the oil tank having the inclined portion. Since the oil return hole penetrating on the oil tank side is provided, the lubricating oil does not reach the inclined part and oil leakage to the outside of the device can be prevented, and even if it adheres to the inclined part, it can be reliably collected in the oil tank.
[0029]
In addition, since the baffle ring is provided on the outer peripheral surface of the inner cylinder of the oil tank, the upper end is higher than the oil surface of the lubricating oil and the gap between the inner peripheral surface of the cylindrical portion is very small. Since generation can be suppressed and the oil level between the inner cylinder and the cylindrical portion of the oil tank can be lowered, the lubricating oil does not reach the upper end of the inner cylinder and oil leakage to the outside of the device can be prevented.
[0030]
Further, since the lower end of the baffle ring protrudes downward from the lower end of the cylindrical part, the oil level between the inner cylinder and the cylindrical part can be further lowered, and the lubricating oil does not reach the upper end of the inner cylinder and Oil leakage to the outside can be prevented.
[0031]
Furthermore, since the baffle ring is provided with an oil return hole penetrating so that the lower end surface thereof faces the inner peripheral surface of the tubular portion, the oil surface between the inner tube and the tubular portion is further effectively lowered. The lubricating oil cannot reach the upper end of the inner cylinder, and oil leakage to the outside of the device can be prevented. In addition, oil retention can be reduced and oil temperature rise can be reduced.
[0032]
In addition, a protrusion projecting downward from the lower end of the guide bearing is provided at the lower end of the cylindrical portion of the runner, and a hole penetrating from the inner peripheral surface toward the outer peripheral surface is provided in the protruding portion. Oil leakage to the outside of the equipment can be prevented.
[0033]
In addition, since a groove from the inner peripheral side to the outer peripheral side is provided on the lower end surface of the projecting portion provided at the lower end of the cylindrical portion of the runner, the lubricating oil does not reach the upper end of the inner cylinder and oil leaks to the outside of the equipment. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a partial longitudinal sectional view showing an embodiment of a bearing oil leakage prevention apparatus for a vertical rotating machine according to the present invention.
2 is a partial front view of the bearing oil leakage prevention device of the vertical rotating machine shown in FIG.
3 is a partial view showing a state of an oil surface during operation of the bearing oil leakage prevention device of the vertical rotating machine shown in FIG.
FIG. 4 is a partial longitudinal sectional view showing another embodiment of the bearing oil leakage prevention device for a vertical rotating machine according to the present invention.
FIG. 5 is a partial longitudinal sectional view showing another embodiment of the bearing oil leakage preventing device for a vertical rotating machine according to the present invention.
FIG. 6 is a partial longitudinal sectional view showing another embodiment of the bearing oil leakage prevention device for a vertical rotating machine according to the present invention.
FIG. 7 is a partial longitudinal sectional view showing another embodiment of the bearing oil leakage preventing device for a vertical rotating machine according to the present invention.
8 is a partial front view of the bearing oil leakage prevention device of the vertical rotating machine shown in FIG. 7 as viewed in the direction of arrow C. FIG.
FIG. 9 is a partial vertical sectional view showing a bearing oil leakage prevention device of a conventional vertical rotating machine.
10 is a partial view showing a state of an oil surface during operation of the bearing oil leakage prevention device of the vertical rotating machine shown in FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Runner 2a Cylindrical part 3 Guide bearing 4 Oil tank 4b Inner cylinder 4b1 Inclined part 6 Ring 7 Oil return hole 8 Baffle ring 9 Oil return hole 10 Projection part 11 Hole 12 Groove

Claims (4)

立軸の回転軸、この回転軸に形成されたランナー、このランナーに形成され上記回転軸と所定の空間を有して軸下方に延びる筒状部、この筒状部の外周を油膜を介して支持することにより上記回転軸を回転可能に支承する案内軸受、この案内軸受と上記筒状部とを浸す潤滑油を収容し、上記回転軸と筒状部との空間に突出した内筒を有する油槽、この油槽の内筒の上端面を外周側が低くなるように傾斜させた傾斜部、上記内筒の上端部外側に上端が上記傾斜部より上方に突出して取り付けられた円環、この円環に上記傾斜部側から上記油槽側に貫通する油戻し穴を設けたことを特徴とする立形回転機の軸受油洩れ防止装置。  A vertical rotating shaft, a runner formed on the rotating shaft, a cylindrical portion formed on the runner and having a predetermined space with the rotating shaft and extending below the shaft, and an outer periphery of the cylindrical portion supported via an oil film A guide bearing that rotatably supports the rotary shaft, an oil tank that contains lubricating oil that immerses the guide bearing and the cylindrical portion, and has an inner cylinder that protrudes into the space between the rotary shaft and the cylindrical portion An inclined portion in which the upper end surface of the inner cylinder of the oil tank is inclined so that the outer peripheral side is lowered, an annular ring whose upper end protrudes upward from the inclined portion and is attached to the outer side of the upper end portion of the inner cylinder A bearing oil leakage prevention device for a vertical rotating machine, characterized in that an oil return hole penetrating from the inclined portion side to the oil tank side is provided. 立軸の回転軸、この回転軸に形成されたランナー、このランナーに形成され上記回転軸と所定の空間を有して軸下方に伸びる筒状部、この筒状部の外周を油膜を介して支持することにより上記回転軸を回転可能に支承する案内軸受、この案内軸受と上記筒状部とを浸す潤滑油を収容し、上記回転軸と筒状部との空間に突出した内筒を有する油槽、この油槽の内筒の外周面に、上端が上記潤滑油の油面よりも高く、かつ上記筒状部の内周面との間隙を微小とするバッフルリングを設けたことを特徴とする立形回転機の軸受油洩れ防止装置。  A vertical rotating shaft, a runner formed on the rotating shaft, a cylindrical portion formed on the runner and extending below the shaft with a predetermined space from the rotating shaft, and an outer periphery of the cylindrical portion supported via an oil film A guide bearing that rotatably supports the rotary shaft, an oil tank that contains lubricating oil that immerses the guide bearing and the cylindrical portion, and has an inner cylinder that protrudes into the space between the rotary shaft and the cylindrical portion The baffle ring is provided on the outer peripheral surface of the inner cylinder of the oil tank, the upper end of which is higher than the oil level of the lubricating oil and the gap between the cylindrical part and the inner peripheral surface is minute. Bearing oil leakage prevention device for rotary machines. バッフルリングの下端を筒状部の下端より下方に突出させたことを特徴とする請求項２記載の立形回転機の軸受油洩れ防止装置。  The bearing oil leakage prevention device for a vertical rotating machine according to claim 2, wherein the lower end of the baffle ring protrudes downward from the lower end of the cylindrical portion. バッフルリングにその下端面と筒状部内周面とが対面するように貫通した油戻し穴を設けたことを特徴とする請求項２または３に記載の立形回転機の軸受油洩れ防止装置。  The bearing oil leakage prevention device for a vertical rotating machine according to claim 2 or 3, wherein an oil return hole is provided in the baffle ring so that the lower end surface thereof faces the inner peripheral surface of the cylindrical portion.
JP07302195A 1995-03-30 1995-03-30 Bearing oil leakage prevention device for vertical rotating machine Expired - Lifetime JP3663658B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07302195A JP3663658B2 (en) 1995-03-30 1995-03-30 Bearing oil leakage prevention device for vertical rotating machine

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Application Number Priority Date Filing Date Title
JP07302195A JP3663658B2 (en) 1995-03-30 1995-03-30 Bearing oil leakage prevention device for vertical rotating machine

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JPH08270891A JPH08270891A (en) 1996-10-15
JP3663658B2 true JP3663658B2 (en) 2005-06-22

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