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JP4310102B2 - Oil discharge mechanism for rotating machinery - Google Patents
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JP4310102B2 - Oil discharge mechanism for rotating machinery - Google Patents

Oil discharge mechanism for rotating machinery Download PDF

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JP4310102B2
JP4310102B2 JP2002357834A JP2002357834A JP4310102B2 JP 4310102 B2 JP4310102 B2 JP 4310102B2 JP 2002357834 A JP2002357834 A JP 2002357834A JP 2002357834 A JP2002357834 A JP 2002357834A JP 4310102 B2 JP4310102 B2 JP 4310102B2
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Prior art keywords
casing
main shaft
oil discharge
seal device
circumferential groove
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JP2004190753A (en
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教夫 北野
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Sanden Corp
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Sanden Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、回転機械の油排出機構に関するものである。
【０００２】
【従来の技術】
外部駆動源により回転駆動される主軸と、主軸を収容するケーシングと、ケーシングの主軸貫通部に配設された軸封装置とを備える回転機械の油排出機構であって、ケーシングの主軸貫通部に且つ軸封装置よりもケーシング外方（前方）の部位に円環状の堰が嵌合し、ケーシングの軸封装置と堰との間の部位に油排出孔が形成された回転機械の油排出機構が、特許文献１に開示されている。
特許文献１の油排出機構によれば、ケーシング内部から軸封装置を通って漏出した潤滑油は、堰によりせき止められ、油排出孔を介してケーシング外へ排出される。この結果、ケーシング内部から軸封装置を通って漏出した潤滑油が、主軸に外部駆動源の動力を伝達する電磁クラッチのローターとアーマチュアとの当接部に到達して、電磁クラッチの作動を阻害する事態の発生が防止される。
【０００３】
【特許文献１】
特開平７−１４５７８０号公報
【０００４】
【発明が解決しようとする課題】
特許文献１の回転機械の油排出機構には、環状の堰をケーシングの主軸貫通部に圧入する必要があり、回転機械の部品数と組立工数の増加を招くという問題がある。
本発明は上記問題に鑑みてなされたものであり、回転機械の部品数と組立工数の増加を招かない回転機械の油排出機構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】
上記課題を解決するために、本発明においては、外部駆動源により回転駆動される主軸と、主軸を収容するケーシングと、ケーシングの主軸貫通部に配設された軸封装置とを備える回転機械の油排出機構であって、ケーシングの主軸貫通部内面に且つ軸封装置よりもケーシング外方の部位に周溝が形成され、ケーシングの主軸貫通部に前記周溝に連通する油排出孔が形成されており、ケーシングの前記油排出孔出口近傍部下面が、主軸に沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ且つ斜め下方へ延在しており、前記油排出孔出口から延びる山形断面のリブが前記下面に沿って下方へ延在し、リブの下端がケーシング外面に形成され下方へ延びる溝に接続されていることを特徴とする回転機械の油排出機構を提供する。
【０００６】
本発明に係る回転機械の油排出機構においては、ケーシング内部から軸封装置を通って漏出し、ケーシングの主軸貫通部内面を伝う潤滑油は、ケーシングの主軸貫通部内面に且つ軸封装置よりもケーシング外方の部位に形成された周溝によりせき止められて当該周溝内に滞留し、次いで、ケーシングの主軸貫通部に形成され前記周溝に連通する油排出孔を介してケーシング外へ排出される。この結果、ケーシング内部から軸封装置を通って漏出した潤滑油が、ケーシングの主軸貫通部内面を伝ってケーシング外へ漏出し、主軸に外部駆動源の動力を伝達する電磁クラッチのローターとアーマチュアとの当接部に到達して電磁クラッチの作動を阻害する事態の発生が防止される。
油排出孔出口に到達した潤滑油が、リブに沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ流れ、次いでケーシング外面に形成された溝に沿って下方へ流れることにより、ケーシング内部から軸封装置を通って漏出した潤滑油が、主軸と外部駆動源との作動係合部、すなわち電磁クラッチ部に到達することが防止される。
本発明に係る回転機械の油排出機構においては、特許文献１の油排出機構が有する堰に代えてケーシングの主軸貫通部内面に周溝を形成しているので、回転機械の部品数と組立工数の増加を招かない。
【０００７】
また本発明においては、外部駆動源により回転駆動される主軸と、主軸を収容するケーシングと、ケーシングの主軸貫通部に配設された軸封装置とを備える回転機械の油排出機構であって、ケーシングの主軸貫通部内面に且つ軸封装置よりもケーシング外方の部位に周溝が形成され、ケーシングの主軸貫通部に前記周溝に連通する油排出孔が形成されており、ケーシングの前記油排出孔出口近傍部下面が、主軸に沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ且つ斜め下方へ延在しており、前記油排出孔出口から延びる山形断面のリブが前記下面に沿って下方へ延在し、リブの下端に下方へ差し向けられた突起が形成されていることを特徴とする回転機械の油排出機構を提供する。
油排出孔出口に到達した潤滑油が、リブに沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ流れ、リブの下端に形成された突起から滴下することにより、ケーシング内部から軸封装置を通って漏出した潤滑油が、主軸と外部駆動源との作動係合部、すなわち電磁クラッチ部に到達することが防止される。
【０００８】
本発明の好ましい態様においては、主軸の前記ケーシング内面周溝に対峙する部位に周溝が形成されている。
ケーシング内部から軸封装置を通って漏出し主軸表面を伝う潤滑油は、主軸に形成された周溝でせき止められ、次いで、ケーシングの主軸貫通部内面の周溝へ滴下し、或いは主軸の回転に伴ってケーシングの主軸貫通部内面の周溝へ向けて飛散して、ケーシングの主軸貫通部内面の周溝内に滞留し、次いで、油排出孔を介してケーシング外へ排出される。この結果、ケーシング内部から軸封装置を通って漏出した潤滑油がケーシング外へ漏出し、主軸に外部駆動源の動力を伝達する電磁クラッチのローターとアーマチュアとの当接部に到達して電磁クラッチの作動を阻害する事態の発生が、効果的に防止される。
【０００９】
本発明の好ましい態様においては、ケーシングの主軸貫通部に且つ軸封装置と主軸支持用ベアリングとの間の部位に外気導入孔が形成されている。
潤滑油が油排出孔を通ってケーシング外へ排出される際に、ケーシングの主軸貫通部の軸封装置と主軸支持用ベアリングとの間の空間が負圧になる事態の発生が、外気導入孔の配設により防止される。この結果、ケーシング内部から軸封装置を通って漏出した潤滑油の、油排出孔を介するケーシング外への排出が促進される。
【００１０】
【発明の実施の形態】
本発明の実施例に係る回転機械の油排出装置を説明する。
図１に示すように、スクロール型圧縮機の主軸１が、ケーシング２を貫通してケーシング２外へ延びている。ケーシング２に取り付けられた電磁クラッチ３を介して、主軸１の先端部に、図示しない外部駆動源から動力が伝達される。
ケーシング２の主軸１貫通部に、軸封装置４と主軸支持用のベアリング５とが配設されている。ベアリング５は、軸封装置４よりもケーシング外方に配設されている。
ケーシング２の主軸１貫通部内面に、且つ軸封装置４よりもケーシング外方でベアリング５よりもケーシング内方（後方）の部位に、周溝６が形成されている。ケーシング２の主軸貫通部に、上端が周溝６に連通し下端がケーシング２の主軸１貫通部下面に開口する油排出孔７が形成されている。
ケーシング２の油排出孔７出口近傍部の下面２ａが、主軸１に沿って電磁クラッチ３から遠ざかる方向へ且つ斜め下方へ延在している。油排出孔７出口から延びる山形断面のリブ８が前記下面２ａに沿って下方へ延在している。リブ８の下端は、ケーシング２外面に形成された下方へ延びる溝９に接続している。
主軸１の前記ケーシング内面周溝６に対峙する部位に周溝１０が形成されている。
ケーシング２の主軸貫通部に且つ軸封装置４とベアリング５との間の部位に、下端がケーシング２の主軸貫通部内面に開口し上端がケーシング２の主軸貫通部上面に開口する外気導入孔１１が形成されている。
【００１１】
本実施例に係る回転機械の油排出機構においては、ケーシング２内部から軸封装置４を通って漏出し、ベアリング５へ向けてケーシング２の主軸貫通部内面を伝う潤滑油は、ケーシング２の主軸貫通部内面に且つ軸封装置４よりもケーシング２外方の部位に形成された周溝６によりせき止められて周溝６内に滞留し、次いで、ケーシング２の主軸貫通部に形成され周溝６に連通する油排出孔７を介してケーシング２外へ排出される。この結果、ケーシング２内部から軸封装置４を通って漏出した潤滑油が、ケーシング２の主軸貫通部内面を伝ってベアリング５まで到達し、ベアリング５に付着してベアリング５の作動を阻害し、或いはベアリング５を越えケーシング２外へ漏出して電磁クラッチ３まで到達し、電磁クラッチ３のローター３ａとアーマチュア３ｂとの当接部に付着して電磁クラッチ３の作動を阻害する等の好ましくない事態の発生が防止される。
本実施例に係る回転機械の油排出機構においては、特許文献１の油排出機構が有する堰に代えてケーシング２内面に周溝６を形成しているので、回転機械の部品数と組立工数の増加を招かない。
【００１２】
ケーシング２内部から軸封装置４を通って漏出し、ベアリング５へ向けて主軸１の表面を伝う潤滑油は、主軸１に形成された周溝１０でせき止められ、次いで、対峙するケーシング２内面の周溝６へ滴下し、或いは主軸１の回転に伴って対峙するケーシング２内面の周溝６へ向けて飛散して周溝６内に滞留し、次いで、油排出孔７を介してケーシング２外へ排出される。この結果、ケーシング２内部から軸封装置４を通って漏出した潤滑油が、主軸１の表面やケーシング２内面を伝ってベアリング５まで到達し、ベアリング５に付着してベアリング５の作動を阻害し、或いはベアリング５を越えケーシング２外へ漏出して電磁クラッチ３まで到達し、電磁クラッチ３のローター３ａとアーマチュア３ｂとの当接部に付着して電磁クラッチ３の作動を阻害する等の好ましくない事態の発生が、効果的に防止される。
【００１３】
ケーシング２内部から軸封装置４を通って漏出した潤滑油が、油排出孔７を通ってケーシング２外へ排出される際に、ケーシング２の主軸貫通部の軸封装置４とベアリング５との間の空間が負圧になる事態の発生が、外気導入孔１１の配設により防止される。この結果、ケーシング２内部から軸封装置４を通って漏出した潤滑油の、油排出孔７を介するケーシング２外への排出が促進される。
【００１４】
油排出孔７の出口に到達した潤滑油は、リブ８に沿って電磁クラッチ３から遠ざかる方向へ且つ下方へ流れ、次いでケーシング２の外面に形成された溝９に沿って下方へ流れ、溝９の下端から滴下して、図示しないオイルパンに貯留される。この結果、ケーシング２内部から軸封装置４を通って漏出した潤滑油が、電磁クラッチ３、ひいてはローター３ａとアーマチュア３ｂとの当接部に到達するのが防止される。
【００１５】
図２に示すように、溝９に代えて、リブ８の下端に下方へ差し向けられた突起１２を形成しても良い。
油排出孔７の出口に到達した潤滑油は、リブ８に沿って電磁クラッチ３から遠ざかる方向へ且つ下方へ流れ、次いでリブ８の下端に形成された突起１２から滴下して、図示しないオイルパンに貯留される。この結果、ケーシング２内部から軸封装置４を通って漏出した潤滑油が、電磁クラッチ３、ひいてはローター３ａとアーマチュア３ｂとの当接部に到達するのが防止される。
【００１６】
【発明の効果】
以上説明したごとく、本発明に係る回転機械の油排出機構においては、ケーシング内部から軸封装置を通って漏出し、ケーシングの主軸貫通部内面を伝う潤滑油は、ケーシングの主軸貫通部内面に且つ軸封装置よりもケーシング外方の部位に形成された周溝によりせき止められて当該周溝内に滞留し、次いで、ケーシングの主軸貫通部に形成され前記周溝に連通する油排出孔を介してケーシング外へ排出される。この結果、ケーシング内部から軸封装置を通って漏出した潤滑油が、ケーシングの主軸貫通部内面を伝ってケーシング外へ漏出し、主軸に外部駆動源の動力を伝達する電磁クラッチのローターとアーマチュアとの当接部に付着して電磁クラッチの作動を阻害する事態の発生が防止される。
油排出孔出口に到達した潤滑油が、リブに沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ流れ、次いでケーシング外面に形成された溝に沿って下方へ流れることにより、ケーシング内部から軸封装置を通って漏出した潤滑油が、主軸と外部駆動源との作動係合部、すなわち電磁クラッチ部に到達することが防止される。
本発明に係る回転機械の油排出機構においては、特許文献１の油排出機構が有する堰に代えてケーシングの主軸貫通部内面に周溝を形成しているので、回転機械の部品数と組立工数の増加を招かない。
【図面の簡単な説明】
【図１】本発明の実施例に係る回転機械の油排出機構の断面図である。
【図２】本発明の他の実施例に係る回転機械の油排出機構の部分断面図である。
【符号の説明】
１ 主軸
２ ケーシング
３ 電磁クラッチ
４ 軸封装置
５ ベアリング
６ 周溝
７ 油派出孔
８ リブ
９ 溝
１０ 周溝
１１ 外気導入孔
１２ 突起[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil discharge mechanism of a rotary machine.
[0002]
[Prior art]
An oil discharge mechanism for a rotary machine, comprising: a main shaft that is rotationally driven by an external drive source; a casing that houses the main shaft; and a shaft seal device that is disposed in the main shaft penetrating portion of the casing. An oil discharge mechanism for a rotary machine in which an annular weir is fitted to a portion outside (front) the casing than the shaft seal device, and an oil discharge hole is formed in a portion between the shaft seal device and the weir of the casing However, this is disclosed in Patent Document 1.
According to the oil discharge mechanism of Patent Document 1, the lubricating oil leaked from the inside of the casing through the shaft seal device is blocked by the weir and discharged outside the casing through the oil discharge hole. As a result, the lubricating oil leaked from the inside of the casing through the shaft seal device reaches the contact portion between the rotor and armature of the electromagnetic clutch that transmits the power of the external drive source to the main shaft, thereby inhibiting the operation of the electromagnetic clutch. Occurrence of the situation is prevented.
[0003]
[Patent Document 1]
JP-A-7-145780 [0004]
[Problems to be solved by the invention]
The oil discharge mechanism of the rotating machine disclosed in Patent Document 1 requires a ring-shaped weir to be press-fitted into the main shaft penetrating portion of the casing, which increases the number of parts and the number of assembly steps of the rotating machine.
The present invention has been made in view of the above problems, and an object thereof is to provide an oil discharge mechanism for a rotating machine that does not increase the number of parts and the number of assembly steps of the rotating machine.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, a rotary machine including a main shaft that is rotationally driven by an external drive source, a casing that accommodates the main shaft, and a shaft seal device that is disposed in a main shaft penetrating portion of the casing. An oil discharge mechanism, wherein a circumferential groove is formed on the inner surface of the casing main shaft penetrating portion and outside the casing relative to the shaft seal device, and an oil discharge hole communicating with the peripheral groove is formed in the main shaft penetrating portion of the casing. A lower surface of the casing in the vicinity of the oil discharge hole outlet of the casing extends along the main shaft in a direction away from the operation engagement portion between the main shaft and the external drive source and obliquely downward. There is provided an oil discharge mechanism for a rotary machine, wherein an extending chevron-shaped rib extends downward along the lower surface, and a lower end of the rib is connected to a groove formed on the outer surface of the casing and extending downward .
[0006]
In the oil discharge mechanism of the rotary machine according to the present invention, the lubricating oil leaking from the inside of the casing through the shaft seal device and transmitted through the inner surface of the main shaft penetrating portion of the casing is more on the inner surface of the main shaft through portion of the casing than the shaft seal device. It is blocked by a circumferential groove formed on the outer part of the casing and stays in the circumferential groove, and is then discharged out of the casing through an oil discharge hole formed in the main shaft penetrating portion of the casing and communicating with the circumferential groove. The As a result, the lubricating oil leaked from the inside of the casing through the shaft seal device leaks out of the casing through the inner surface of the casing through the main shaft, and the rotor and armature of the electromagnetic clutch that transmits the power of the external drive source to the main shaft It is possible to prevent the occurrence of a situation where the contact portion of the electromagnetic clutch reaches the contact portion and hinders the operation of the electromagnetic clutch.
The lubricating oil that has reached the outlet of the oil discharge hole flows in a direction away from the operating engagement portion between the main shaft and the external drive source along the rib, and then flows downward along a groove formed in the outer surface of the casing, thereby Lubricating oil leaked from the inside through the shaft seal device is prevented from reaching the operating engagement portion between the main shaft and the external drive source, that is, the electromagnetic clutch portion.
In the oil discharge mechanism of the rotary machine according to the present invention, since the circumferential groove is formed on the inner surface of the main shaft penetrating portion of the casing instead of the weir included in the oil discharge mechanism of Patent Document 1, the number of parts and the assembly man-hour of the rotary machine Will not increase.
[0007]
Further, in the present invention, an oil discharge mechanism of a rotary machine comprising a main shaft that is rotationally driven by an external drive source, a casing that accommodates the main shaft, and a shaft seal device that is disposed in a main shaft penetrating portion of the casing, A circumferential groove is formed on the inner surface of the casing main shaft penetrating portion and on the outer side of the casing relative to the shaft seal device, and an oil discharge hole communicating with the peripheral groove is formed in the main shaft penetrating portion of the casing. The lower surface of the discharge hole outlet vicinity portion extends along the main shaft in a direction away from the operation engagement portion between the main shaft and the external drive source and obliquely downward, and the rib having the chevron cross section extending from the oil discharge hole outlet An oil discharge mechanism for a rotating machine is provided, characterized in that a protrusion extending downward along the lower surface is formed at the lower end of the rib and directed downward.
The lubricating oil that has reached the outlet of the oil discharge hole flows along the rib in a direction away from the operating engagement portion between the main shaft and the external drive source, and drops from the protrusion formed at the lower end of the rib, thereby The lubricating oil leaked through the sealing device is prevented from reaching the operating engagement portion between the main shaft and the external drive source, that is, the electromagnetic clutch portion.
[0008]
In a preferred aspect of the present invention, a circumferential groove is formed in a portion of the main shaft that faces the circumferential groove on the casing inner surface.
Lubricating oil leaking from the inside of the casing through the shaft seal device and transmitted to the surface of the main shaft is dammed by the peripheral groove formed on the main shaft, and then dripped into the peripheral groove on the inner surface of the main shaft penetrating portion of the casing, or the main shaft is rotated. Along with this, the air scatters toward the circumferential groove on the inner surface of the main shaft penetrating portion of the casing, stays in the peripheral groove on the inner surface of the main shaft penetrating portion of the casing, and then is discharged out of the casing through the oil discharge hole. As a result, the lubricating oil leaked from the inside of the casing through the shaft seal device leaks to the outside of the casing and reaches the contact portion between the rotor and the armature of the electromagnetic clutch that transmits the power of the external drive source to the main shaft. Occurrence of a situation that hinders the operation of is effectively prevented.
[0009]
In a preferred aspect of the present invention, an outside air introduction hole is formed in the main shaft penetrating portion of the casing and between the shaft seal device and the main shaft support bearing.
When the lubricating oil is discharged out of the casing through the oil discharge hole, the occurrence of a situation in which the space between the shaft seal device of the main shaft penetrating portion of the casing and the main shaft support bearing becomes negative pressure is This is prevented by the arrangement. As a result, discharge of the lubricating oil leaked from the inside of the casing through the shaft seal device to the outside of the casing through the oil discharge hole is promoted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An oil discharge device for a rotary machine according to an embodiment of the present invention will be described.
As shown in FIG. 1, the main shaft 1 of the scroll compressor extends through the casing 2 and out of the casing 2. Power is transmitted from an external drive source (not shown) to the tip of the main shaft 1 via an electromagnetic clutch 3 attached to the casing 2.
A shaft sealing device 4 and a bearing 5 for supporting the main shaft are disposed in the main shaft 1 penetrating portion of the casing 2. The bearing 5 is disposed outside the casing with respect to the shaft seal device 4.
A circumferential groove 6 is formed on the inner surface of the main shaft 1 penetrating portion of the casing 2 and on the outer side of the casing than the shaft seal device 4 and on the inner side (rear) of the casing than the bearing 5. An oil discharge hole 7 whose upper end communicates with the circumferential groove 6 and whose lower end opens on the lower surface of the main shaft 1 through portion of the casing 2 is formed in the main shaft through portion of the casing 2.
A lower surface 2 a of the casing 2 near the outlet of the oil discharge hole 7 extends along the main shaft 1 in a direction away from the electromagnetic clutch 3 and obliquely downward. A rib 8 having a chevron cross section extending from the outlet of the oil discharge hole 7 extends downward along the lower surface 2a. The lower end of the rib 8 is connected to a downwardly extending groove 9 formed on the outer surface of the casing 2.
A circumferential groove 10 is formed in a portion of the main shaft 1 that faces the casing inner circumferential groove 6.
An outside air introduction hole 11 in the main shaft penetrating portion of the casing 2 and at a portion between the shaft seal device 4 and the bearing 5, the lower end opens on the inner surface of the main shaft penetrating portion of the casing 2 and the upper end opens on the upper surface of the main shaft penetrating portion of the casing 2. Is formed.
[0011]
In the oil discharge mechanism of the rotary machine according to the present embodiment, the lubricating oil leaking from the inside of the casing 2 through the shaft seal device 4 and traveling along the inner surface of the main shaft penetrating portion of the casing 2 toward the bearing 5 is the main shaft of the casing 2. It is blocked by a circumferential groove 6 formed on the inner surface of the penetrating part and outside the casing 2 with respect to the shaft seal device 4 and stays in the circumferential groove 6, and then formed in the main shaft penetrating part of the casing 2. Is discharged out of the casing 2 through an oil discharge hole 7 communicating with the. As a result, the lubricating oil leaked from the inside of the casing 2 through the shaft seal device 4 reaches the bearing 5 through the inner surface of the main shaft penetrating portion of the casing 2, adheres to the bearing 5, and inhibits the operation of the bearing 5. Or, it may leak beyond the casing 2 to the outside of the casing 2 and reach the electromagnetic clutch 3, which may cause an undesirable situation such as adhering to the contact portion between the rotor 3 a and the armature 3 b of the electromagnetic clutch 3 to hinder the operation of the electromagnetic clutch 3. Is prevented from occurring.
In the oil discharge mechanism of the rotary machine according to the present embodiment, since the circumferential groove 6 is formed on the inner surface of the casing 2 instead of the weir included in the oil discharge mechanism of Patent Document 1, the number of parts and assembly man-hours of the rotary machine are reduced. It does not increase.
[0012]
The lubricating oil that leaks from the inside of the casing 2 through the shaft seal device 4 and travels along the surface of the main shaft 1 toward the bearing 5 is dammed by the circumferential groove 10 formed in the main shaft 1, and then the inner surface of the facing casing 2. Dropped into the circumferential groove 6 or scattered toward the circumferential groove 6 on the inner surface of the casing 2 facing the rotation of the main shaft 1 and stayed in the circumferential groove 6, and then outside the casing 2 through the oil discharge hole 7. Is discharged. As a result, the lubricating oil leaked from the inside of the casing 2 through the shaft seal device 4 reaches the bearing 5 along the surface of the main shaft 1 and the inner surface of the casing 2 and adheres to the bearing 5 to inhibit the operation of the bearing 5. Or, it is not preferable that it leaks out of the casing 2 beyond the bearing 5 to reach the electromagnetic clutch 3 and adheres to the contact portion between the rotor 3a and the armature 3b of the electromagnetic clutch 3 to obstruct the operation of the electromagnetic clutch 3. The occurrence of the situation is effectively prevented.
[0013]
When the lubricating oil leaked from the inside of the casing 2 through the shaft seal device 4 is discharged out of the casing 2 through the oil discharge hole 7, the shaft seal device 4 and the bearing 5 of the main shaft penetrating portion of the casing 2 Occurrence of a negative pressure in the space between them is prevented by the arrangement of the outside air introduction hole 11. As a result, the discharge of the lubricating oil leaked from the inside of the casing 2 through the shaft seal device 4 to the outside of the casing 2 through the oil discharge hole 7 is promoted.
[0014]
The lubricating oil that has reached the outlet of the oil discharge hole 7 flows downward along the rib 8 in a direction away from the electromagnetic clutch 3, and then flows downward along a groove 9 formed on the outer surface of the casing 2. It is dripped from the lower end of the oil and stored in an oil pan (not shown). As a result, the lubricating oil leaked from the inside of the casing 2 through the shaft seal device 4 is prevented from reaching the contact portion between the electromagnetic clutch 3 and eventually the rotor 3a and the armature 3b.
[0015]
As shown in FIG. 2, instead of the groove 9, a protrusion 12 directed downward may be formed at the lower end of the rib 8.
Lubricating oil that has reached the outlet of the oil discharge hole 7 flows along the rib 8 in a direction away from the electromagnetic clutch 3 and downward, and then drops from a protrusion 12 formed at the lower end of the rib 8, so that an oil pan (not shown) It is stored in. As a result, the lubricating oil leaked from the inside of the casing 2 through the shaft seal device 4 is prevented from reaching the contact portion between the electromagnetic clutch 3 and eventually the rotor 3a and the armature 3b.
[0016]
【The invention's effect】
As described above, in the oil discharge mechanism for a rotary machine according to the present invention, the lubricating oil leaking from the inside of the casing through the shaft seal device and transmitted through the inner surface of the main shaft penetrating portion of the casing, It is blocked by a circumferential groove formed in a portion outside the casing from the shaft seal device and stays in the circumferential groove, and then through an oil discharge hole that is formed in the main shaft penetrating portion of the casing and communicates with the circumferential groove. It is discharged out of the casing. As a result, the lubricating oil leaked from the inside of the casing through the shaft seal device leaks out of the casing through the inner surface of the casing through the main shaft, and the rotor and armature of the electromagnetic clutch that transmits the power of the external drive source to the main shaft Occurrence of a situation that adheres to the abutting portion and hinders the operation of the electromagnetic clutch is prevented.
The lubricating oil that has reached the outlet of the oil discharge hole flows in a direction away from the operating engagement portion between the main shaft and the external drive source along the rib, and then flows downward along a groove formed in the outer surface of the casing. Lubricating oil leaked from the inside through the shaft seal device is prevented from reaching the operating engagement portion between the main shaft and the external drive source, that is, the electromagnetic clutch portion.
In the oil discharge mechanism of the rotary machine according to the present invention, since the circumferential groove is formed on the inner surface of the main shaft penetrating portion of the casing instead of the weir included in the oil discharge mechanism of Patent Document 1, the number of parts and the assembly man-hour of the rotary machine Will not increase.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an oil discharge mechanism of a rotary machine according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of an oil discharge mechanism of a rotary machine according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main shaft 2 Casing 3 Electromagnetic clutch 4 Shaft seal device 5 Bearing 6 Circumferential groove 7 Oil supply hole 8 Rib 9 Groove 10 Circumferential groove 11 Outside air introduction hole 12 Protrusion

Claims (4)

外部駆動源により回転駆動される主軸と、主軸を収容するケーシングと、ケーシングの主軸貫通部に配設された軸封装置とを備える回転機械の油排出機構であって、ケーシングの主軸貫通部内面に且つ軸封装置よりもケーシング外方の部位に周溝が形成され、ケーシングの主軸貫通部に前記周溝に連通する油排出孔が形成されており、ケーシングの前記油排出孔出口近傍部下面が、主軸に沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ且つ斜め下方へ延在しており、前記油排出孔出口から延びる山形断面のリブが前記下面に沿って下方へ延在し、リブの下端がケーシング外面に形成され下方へ延びる溝に接続されていることを特徴とする回転機械の油排出機構。An oil discharge mechanism for a rotary machine, comprising: a main shaft that is rotationally driven by an external drive source; a casing that houses the main shaft; and a shaft seal device that is disposed in the main shaft penetrating portion of the casing. In addition, a circumferential groove is formed in a portion outside the casing relative to the shaft seal device, and an oil discharge hole communicating with the circumferential groove is formed in a main shaft penetrating portion of the casing. However, the rib extending in the direction of the angle extending away from the working engagement portion between the main shaft and the external drive source along the main shaft and obliquely downward, and the rib having the chevron cross section extending from the outlet of the oil discharge hole extends downward along the lower surface. An oil discharge mechanism for a rotary machine, wherein the lower end of the rib extends and is connected to a groove formed on the outer surface of the casing and extending downward . 外部駆動源により回転駆動される主軸と、主軸を収容するケーシングと、ケーシングの主軸貫通部に配設された軸封装置とを備える回転機械の油排出機構であって、ケーシングの主軸貫通部内面に且つ軸封装置よりもケーシング外方の部位に周溝が形成され、ケーシングの主軸貫通部に前記周溝に連通する油排出孔が形成されており、ケーシングの前記油排出孔出口近傍部下面が、主軸に沿って主軸と外部駆動源との作動係合部から遠ざかる方向へ且つ斜め下方へ延在しており、前記油排出孔出口から延びる山形断面のリブが前記下面に沿って下方へ延在し、リブの下端に下方へ差し向けられた突起が形成されていることを特徴とする回転機械の油排出機構。An oil discharge mechanism for a rotary machine, comprising: a main shaft that is rotationally driven by an external drive source; a casing that houses the main shaft; and a shaft seal device that is disposed in the main shaft penetrating portion of the casing. In addition, a circumferential groove is formed in a portion outside the casing relative to the shaft seal device, and an oil discharge hole communicating with the circumferential groove is formed in a main shaft penetrating portion of the casing. However, the rib extending in the direction of the angle extending away from the working engagement portion between the main shaft and the external drive source along the main shaft and obliquely downward, and the rib having the chevron cross section extending from the outlet of the oil discharge hole extends downward along the lower surface. An oil discharge mechanism for a rotating machine, characterized in that a protrusion that extends downward is formed at a lower end of the rib. 主軸の前記ケーシング内面周溝に対峙する部位に周溝が形成されていることを特徴とする請求項１又は２に記載の回転機械の油排出機構。The oil discharge mechanism for a rotary machine according to claim 1 or 2 , wherein a circumferential groove is formed in a portion of the main shaft that faces the circumferential groove on the casing inner surface. ケーシングの主軸貫通部に且つ軸封装置と主軸支持用ベアリングとの間の部位に外気導入孔が形成されていることを特徴とする請求項１又は２に記載の回転機械の油排出機構。The oil discharge mechanism for a rotary machine according to claim 1 or 2, wherein an outside air introduction hole is formed in a part of the casing through the main shaft and between the shaft seal device and the main shaft support bearing.
JP2002357834A 2002-12-10 2002-12-10 Oil discharge mechanism for rotating machinery Expired - Fee Related JP4310102B2 (en)

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JP2007126979A (en) * 2005-11-01 2007-05-24 Mitsubishi Heavy Ind Ltd Compressor

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JPS5812759U (en) * 1981-07-17 1983-01-26 株式会社デンソー Shaft sealing device for rotating machinery
JPS6097400U (en) * 1983-12-07 1985-07-03 厚木自動車部品株式会社 Compressor seal structure
JPH07111175B2 (en) * 1986-02-12 1995-11-29 日本真空技術株式会社 Rotary vacuum pump sealing device
JPH0667871U (en) * 1993-02-25 1994-09-22 サンデン株式会社 Open type compressor
JPH08219038A (en) * 1995-02-14 1996-08-27 Sanden Corp Scroll type fluid machine
JP3337610B2 (en) * 1996-07-10 2002-10-21 サンデン株式会社 Compressor

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