JPS61126394A - Rotary compressor - Google Patents

Abstract

PURPOSE:To improve the circulation action of lubricating oil and eliminate the oil shortage phenomenon on restarting and reduce the starting input by forming an oil passing groove in the radial direction from the inner peripheral edge to the outer peripheral edge on the thrust surface on the baring part in the eccentric part of a rotary shaft. CONSTITUTION:On the bearing part 8 in the eccentric part 2 of a rotary shaft 3, a circulation oil passing groove 9 for the inside lubricating oil is formed in the radial direction from the inner peripheral edge to the outer peripheral edge on the thrust surface, and said oil passing groove 9 is allowed to communicate to a lubricating-oil feeding hole 3a formed in the axis center part of the rotary shaft 3. Therefore, during the operation of a compressor, lubricating oil is stored in the oil passing groove 9, and the oil shortage phenomenon on the thrust surface on restarting of the compressor is eliminated, and the compulsory circulation action of the inside lubricating oil during operation can be improved. Therefore, also the input on start can be reduced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明はロータリ圧縮機に係９．特に回転軸の偏心部
におけるスラスト軸受部に、内部潤滑油の循環用通油溝
を当該スラスト面の内周縁から外周縁にわたってラジア
ル方向に凹設したものであるＱ 〔従来のＹｉ術〕 第３図は待開昭５６−１０６０８９号公報に示された従
来のロータリ圧縮機の要部断面図で６９．このロータリ
圧縮機はシリンダ＋１３内で偏心部（２；を有する回転
軸（３）が電動機等で駆動されることにより。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotary compressor.9. Particularly, in the thrust bearing part at the eccentric part of the rotating shaft, an oil passage groove for circulating internal lubricating oil is recessed in the radial direction from the inner circumferential edge to the outer circumferential edge of the thrust surface. [Conventional Yi Technique] Third The figure is a sectional view of the main part of a conventional rotary compressor disclosed in Machikai Publication No. 56-106089. This rotary compressor has a rotating shaft (3) having an eccentric portion (2) inside the cylinder +13, which is driven by an electric motor or the like.

上記偏心部（２：に嵌挿し次ローリングピストン（４）
が当該シリンダ１１３内七偏心回転し、圧縮動作が行な
われるようになっており、上記回転軸（３）はシリンダ
（！ンの両列側の軸受板＋５３１６１とで支えられてい
る。Insert the above eccentric part (2:) into the next rolling piston (4)
rotates eccentrically within the cylinder 113 to perform a compression operation, and the rotating shaft (3) is supported by bearing plates +53161 on both rows of the cylinder (!).

またこれら両軸受板（５１（６１とその間のシリンダ（
１１およびローリングピストン（４）に常時その先端が
当接されているベーン（７）とにより圧縮室（４）が形
成されており、電動機等の自重および磁力等で発生する
スラスト荷重は、上記偏心部（２）におけるスラスト＋
４） 軸受部（団と軸受板ｌあるいは反対側の軸受敬重う。Also, these two bearing plates (51 (61) and the cylinder between them (
11 and a vane (7) whose tip is always in contact with the rolling piston (4) form a compression chamber (4), and the thrust load generated by the weight of the electric motor, magnetic force, etc. Thrust + in part (2)
4) Bearing part (respect the group and bearing plate l or the bearing on the opposite side.

により受けられるようになっている。It is now accepted by

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記した従来例では圧縮機の運転停止時に上記のスラス
ト面に潤滑油を保持しておく部分が特別に設けられてい
ないため１例えば圧縮機の再、弓動時に、当該スラスト
面に油切れを起こし、その結果圧縮機の入力がそれだけ
増大するという欠点があった。この発明は上記従来例に
鑑み、スラスト面に内部潤滑油の強制循環作用と保留作
用を持つ通油溝を形成させたものである。In the conventional example described above, there is no special provision for retaining lubricating oil on the thrust surface when the compressor stops operating, so 1. For example, when the compressor is re-articulated, the thrust surface is free of oil. This has the disadvantage that the compressor input increases accordingly. In view of the above-mentioned conventional example, the present invention has an oil passage groove formed on the thrust surface that has a forced circulation function and a retention function for internal lubricating oil.

〔問題点を解決するための手段〕[Means for solving problems]

この発明の場合は軸心部に内部潤滑油の給油穴を設けた
回転軸の偏心部におけるスラスト軸受部に、上記潤滑油
の循環用通油溝を設けたものである０ 〔作用〕 この発明の場合はスラスト軸受部に設けた通油溝により
、腋部への給油能力および潤滑油の保留能力が同上し、
これによシ圧縮機の例えば長期休止後における再起動時
においても、当該スラスト面での油切れ現象を防止でき
、さらにこれがためスラスト面積の増大も図れるもので
ある。In the case of this invention, an oil passage groove for circulating the lubricating oil is provided in the thrust bearing part of the eccentric part of the rotating shaft which has an internal lubricating oil supply hole in the shaft center part.0 [Operation] This invention In the case of , the ability to supply oil to the armpit and the ability to retain lubricating oil is the same as above, due to the oil passage groove provided in the thrust bearing.
As a result, even when the compressor is restarted after a long period of suspension, for example, it is possible to prevent oil from running out on the thrust surface, and it is also possible to increase the thrust area.

〔実施例〕〔Example〕

第１図はこの発明のロータリ圧縮機の一実施例を示す要
部断面図であり、従来例と同一個所は則−符号で示して
いるが、この発明のものでは回転軸（３）の偏心部（２
１に２けるスラスト軸受部（８）に、特にそのスラスト
面の内周縁から外周縁にわたってラジアル方向に内部潤
滑油の循環用通油溝（男を設け、この通油溝な回転軸（
３）の軸心部に設けた潤滑油の供給穴（３ａ）にラジア
ル給油穴（３１））ｆｔ介して連絡させることにより、
圧縮機の運転時にこの通油＠１９１に潤滑油を保留させ
ておき、圧縮機の再起動時の腋部での油切れ現象をなく
すと共に、運転時における内部潤滑油の強制循環作用の
向上を図っている点に特徴を有するものである。FIG. 1 is a cross-sectional view of the main parts of an embodiment of the rotary compressor of the present invention, and the same parts as in the conventional example are indicated by regular symbols. Part (2
The thrust bearing part (8) in 1 and 2 is provided with an oil passage groove for circulating internal lubricating oil in the radial direction from the inner circumferential edge to the outer circumferential edge of the thrust surface, and this oil groove is used to connect the rotating shaft (
By communicating with the lubricating oil supply hole (3a) provided in the axial center of 3) via the radial oil supply hole (31) ft,
When the compressor is operating, the lubricating oil is stored in this oil passage @191, eliminating the phenomenon of oil running out in the armpit when the compressor is restarted, and improving the forced circulation of the internal lubricating oil during operation. It is characterized by the fact that it aims to

なお第２図はこの発明のものにおける回転軸の偏心部を
示す斜視図であり、上記した通油＃　（９Ｊは偏心部（
２１の冷間鍛造時に同時に、またはその後において切削
加工等により形成されるも゛のである０以上はスラスト
作用が軸受板の一方だけに加わる場合について説明した
が、双方に加わる場合には反対側のスラスト軸受部にも
同様の通油＃Ｉを同様に設けられろものである。In addition, FIG. 2 is a perspective view showing the eccentric part of the rotating shaft in this invention, and the above-mentioned oil passage # (9J is the eccentric part (
The thrust action is formed by cutting, etc., at the same time or after the cold forging in Section 21. We have explained the case where the thrust action is applied to only one side of the bearing plate, but when it is applied to both sides, the thrust action is applied to the opposite side. A similar oil passage #I should be provided in the thrust bearing portion as well.

髪 〔発明の効果〕 この発明のロータリ圧縮機は以上説明したとおり９回転
軸の偏心部におけるスラスト軸受部に。[Effects of the Invention] As explained above, the rotary compressor of this invention has nine thrust bearings in the eccentric part of the rotating shaft.

そのスラスト面の内周縁から外周縁にわたってラジアル
方向に通油＃ＩＩを設けているので、圧縮機の運転時に
おける内部潤滑油の循環作用が向上するばかりでなく、
圧縮機の再起動時にとかく生じゃすいスラスト面での油
切れ現象をなくすことができ、常時円滑なスラスト作用
を期待でき、これによシ起動時の入力も少くなるという
効果を有するものである。Since the oil passage #II is provided in the radial direction from the inner circumferential edge to the outer circumferential edge of the thrust surface, it not only improves the circulation of the internal lubricating oil during operation of the compressor, but also
It is possible to eliminate the phenomenon of oil running out on the thrust surface, which is often rough when the compressor is restarted, and a smooth thrust action can be expected at all times, which has the effect of reducing the input required when starting the compressor. .

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明のロータリ圧縮機の一実施例を示す要
部断面図、第２図はこの発明のものにおける回転軸の偏
心部を示す斜視図、第３図は従来のロータリ圧縮機を示
す要部断面図である。 なお図中ＩＩＩはシリンダ、（２）は偏心部、（３ンは
回転軸、　　（３ａ）は供給穴、　　（３ｂ）はラジア
ル給油穴、（５）（６）は軸受板、（８）はスラスト軸
受部、（９Ｉは通油溝を示す。その他図中同−符号は同
一または相当部分を示すものとする。Fig. 1 is a cross-sectional view of essential parts showing an embodiment of the rotary compressor of the present invention, Fig. 2 is a perspective view showing the eccentric part of the rotating shaft in the rotary compressor of the invention, and Fig. 3 is a view of a conventional rotary compressor. FIG. In the figure, III is the cylinder, (2) is the eccentric part, (3 is the rotating shaft, (3a) is the supply hole, (3b) is the radial oil supply hole, (5) and (6) is the bearing plate, and (8) is the In the thrust bearing section, (9I indicates an oil passage groove. In other figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 両軸受間のシリンダ内で偏心回転し、軸心部に潤滑油の
供給穴を有する回転軸の偏心部における上記軸受板との
スラスト軸受部に、上記供給穴に連通されたラジアル給
油穴で連絡された内部潤滑油の循環用通油溝を、該部の
スラスト面の内周縁から外周縁にわたつてラジアル方向
に凹設したことを特徴とするロータリ圧縮機。The rotary shaft rotates eccentrically in a cylinder between both bearings and has a lubricating oil supply hole in the shaft center, and the thrust bearing part with the bearing plate at the eccentric part of the rotating shaft is connected to the thrust bearing part through a radial oil supply hole that communicates with the supply hole. A rotary compressor characterized in that an oil passage groove for circulating internal lubricating oil is recessed in the radial direction from the inner circumferential edge to the outer circumferential edge of the thrust surface of the part.