JP2817511B2 - Scroll type fluid machine - Google Patents
Scroll type fluid machineInfo
- Publication number
- JP2817511B2 JP2817511B2 JP10994092A JP10994092A JP2817511B2 JP 2817511 B2 JP2817511 B2 JP 2817511B2 JP 10994092 A JP10994092 A JP 10994092A JP 10994092 A JP10994092 A JP 10994092A JP 2817511 B2 JP2817511 B2 JP 2817511B2
- Authority
- JP
- Japan
- Prior art keywords
- scroll
- revolving
- outer peripheral
- peripheral side
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、圧縮機や真空ポンプ等
に適用し、公転スクロールを固定スクロールに押し付け
る背圧機構を有するスクロール形流体機械に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type fluid machine which is applied to a compressor, a vacuum pump or the like and has a back pressure mechanism for pressing a revolving scroll against a fixed scroll.
【0002】[0002]
【従来の技術】従来、この種のスクロール形流体機械
は、特開昭62−182487号公報に開示され且つ図
3及び図4に示すものが知られている。2. Description of the Related Art Conventionally, a scroll type fluid machine of this type has been disclosed in Japanese Patent Application Laid-Open No. 62-182487 and shown in FIGS.
【0003】このものは、ケーシングDの内部に、固定
基板Kの前面に固定渦巻体L及びこの渦巻体Lの外方に
連続する外壁Wを立設した固定スクロールFと、公転基
板Mの前面に公転渦巻体Nを立設した公転スクロールO
とを備え、公転基板Mの背面と静止部材を構成するハウ
ジングHとの間に、公転スクロールOを固定スクロール
Fに押し付ける背面室Pを設けると共に、外壁Wの下面
と公転基板Mの前面外周部との間に環状のスラスト受部
Sを形成している。そして、前記背面室Pに、公転スク
ロールOのボス筒Tに嵌合する駆動軸(図示せず)内に
設ける給油穴を介して前記ケーシングDの底部に溜める
高圧の油溜から汲上げる油を開放させている。又、前記
スラスト受部Sに対応する公転基板Mの前面外周部に、
図4に明示するように、円形の環状溝Aを設けると共
に、この環状溝Aを公転基板Mの外方に開口させる複数
の外側放射溝Bと、前記環状溝Aを各渦巻体の外方部に
位置する一対の吸入ポートX,Yに連通させる内側放射
溝Cとを設けている。The fixed scroll F includes a fixed scroll K in which a fixed scroll L and an outer wall W continuous to the outside of the fixed scroll K are erected on the front of a fixed board K, and a front face of a revolving board M inside a casing D. Scroll O with a revolving spiral N
And a back chamber P for pressing the revolving scroll O against the fixed scroll F is provided between the back surface of the revolving board M and the housing H constituting the stationary member, and the lower surface of the outer wall W and the outer peripheral portion of the front face of the revolving board M are provided. Between them forms an annular thrust receiving portion S. In the back chamber P, oil pumped from a high-pressure oil reservoir stored at the bottom of the casing D via an oil supply hole provided in a drive shaft (not shown) fitted to the boss cylinder T of the revolving scroll O. It is open. Also, on the outer peripheral portion of the front surface of the revolving board M corresponding to the thrust receiving section S,
As shown in FIG. 4, a circular annular groove A is provided, a plurality of outer radial grooves B for opening the annular groove A to the outside of the revolving board M, and the annular groove A is formed on the outer side of each spiral body. And an inner radial groove C that communicates with a pair of suction ports X and Y located at the portion.
【0004】こうして、背面室Pに導入した油を外側放
射溝Bから環状溝A並びに内側放射溝Cに流通させて、
スラスト受部Sの潤滑を行うと共に、このスラスト受部
Sを潤滑した後の油を各吸入ポートX,Yから渦巻体間
に画成する作動室V内に注入し、該作動室V内でのシー
ル性等を改善できるようにしている。In this way, the oil introduced into the rear chamber P flows from the outer radial groove B to the annular groove A and the inner radial groove C,
While lubricating the thrust receiving portion S, the oil after lubricating the thrust receiving portion S is injected from each of the suction ports X and Y into the working chamber V defined between the spiral bodies. It is possible to improve the sealing properties and the like.
【0005】[0005]
【発明が解決しようとする課題】しかし、以上のもので
は、円形の環状溝Aを設けていることから、一見してス
ラスト受部Sの全体に油がまわるとも考えられるが、油
は、背面室Pと吸入ポートX,Yとを結ぶ抵抗の少ない
最短距離を通るから、図4中の矢印で示した経路に多量
の油が流れて、これ以外の経路に流れる油量は少なくな
り、従って、スラスト受部Sの全体に均等に油が行き渡
らずに、該スラスト受部Sでの摺動特性は十分に改善で
きない問題がある。However, in the above arrangement, since the circular annular groove A is provided, it can be considered at first glance that oil flows around the entire thrust receiving portion S. Since it passes through the shortest distance with little resistance connecting the chamber P and the suction ports X and Y, a large amount of oil flows in the path indicated by the arrow in FIG. 4 and the amount of oil flowing in the other paths decreases, and accordingly, However, there is a problem that the oil does not spread evenly over the entire thrust receiving portion S, and the sliding characteristics at the thrust receiving portion S cannot be sufficiently improved.
【0006】又、背面室Pは、高圧の油溜に対して駆動
軸の給油穴部分等での圧力損失分だけ圧力降下し且つ低
圧の吸入ポートX,Yに対して圧力の高い中間圧力域と
なるが、一方で、この背面室Pの圧力は、公転スクロー
ルOを固定スクロールFに押し付ける背圧力を生むため
に必要十分な高い値であることを要するから、背面室P
と低圧の吸入ポートX,Yとの間には大きな圧力差が生
じ、この圧力ドロップを、環状溝Aとその内外の放射溝
B,Cから成る溝部分とでもたせるのは極めて困難であ
り、勢い各吸入ポートX,Yに供給される油量が過剰に
なって、油のかくはんロス等を増大させる問題も起こ
る。The rear chamber P has an intermediate pressure region in which the pressure of the high-pressure oil reservoir drops by an amount corresponding to the pressure loss at the oil supply hole of the drive shaft and the pressure of the low-pressure suction ports X and Y is high. On the other hand, the pressure in the rear chamber P needs to be high enough to generate a back pressure that presses the orbiting scroll O against the fixed scroll F.
And a low pressure suction port X, Y produces a large pressure difference, and it is extremely difficult to provide this pressure drop with the annular groove A and the groove portion formed by the radial grooves B and C inside and outside the annular groove A. The amount of oil supplied to each of the suction ports X and Y becomes excessive, causing a problem that oil stirring loss and the like increase.
【0007】本発明では、公転スクロールの背面室の構
成及びスラスト受部での油溝の構成を工夫することによ
り、スラスト受部全体に油を良好にまわすことができる
と共に、吸入ポートに供給する油量が過剰に増えるのを
防止できるスクロール形流体機械を提供することを主な
目的とする。According to the present invention, by devising the structure of the rear chamber of the orbiting scroll and the structure of the oil groove in the thrust receiving portion, the oil can be satisfactorily fed to the entire thrust receiving portion and supplied to the suction port. A main object of the present invention is to provide a scroll type fluid machine capable of preventing an excessive increase in the amount of oil.
【0008】[0008]
【課題を解決するための手段】そこで、上記主目的を達
成するため、第一に、ケーシング9の内部に、固定基板
11の前面に固定渦巻体12及びこの渦巻体12の外方
に連続する外壁13を立設した固定スクロール1と、公
転基板21の前面に公転渦巻体22を立設した公転スク
ロール2とを備え、前記公転基板21の背面に、前記公
転スクロール2を固定スクロール1に押し付ける背面室
3を設けると共に、前記外壁13の下面と前記公転基板
21の前面外周部との間に環状のスラスト受部4を形成
したスクロール形流体機械において、前記公転基板21
の背面とこれに臨む静止部材との間に、前記背面室3を
中心側室31と外周側室32とに区画する環状シール手
段30を設けて、前記中心側室31を高圧圧力域に連通
させると共に、前記外周側室32を、入口部を前記スラ
スト受部4上において互いに180度変位させ且つそれ
ぞれが前記スラスト受部4上に沿って半周近くにわたり
延びる一対の対称な第一円弧溝51及び第二円弧溝52
を介して、前記各渦巻体12,22の外方に位置する一
対の吸入ポート61,62にそれぞれ連通させる一方、
前記外周側室32に、高圧圧力域から延びる給油通路7
を減圧機構8を介して開口させた。Therefore, in order to achieve the above-mentioned main object, first, inside the casing 9, a fixed spiral body 12 is formed on the front surface of a fixed substrate 11, and is connected to the outside of the spiral body 12. A fixed scroll 1 having an outer wall 13 erected and a revolving scroll 2 having a revolving spiral body 22 erected on the front surface of a revolving substrate 21 are pressed against the fixed scroll 1 against the back surface of the revolving substrate 21. In a scroll type fluid machine in which a back chamber 3 is provided and an annular thrust receiving portion 4 is formed between a lower surface of the outer wall 13 and an outer peripheral portion of a front surface of the revolving substrate 21, the revolving substrate 21
An annular sealing means 30 for dividing the rear chamber 3 into a central chamber 31 and an outer peripheral chamber 32 is provided between the rear surface and a stationary member facing the same, so that the central chamber 31 communicates with a high-pressure pressure area. A pair of symmetrical first arc grooves 51 and second arcs are formed by displacing the outer peripheral side chamber 32 with each other by 180 degrees on the thrust receiving portion 4 and extending almost half way along the thrust receiving portion 4. Groove 52
Through a pair of suction ports 61 and 62 located outside of the spiral bodies 12 and 22, respectively.
An oil supply passage 7 extending from a high pressure region is provided in the outer peripheral side chamber 32.
Was opened via the decompression mechanism 8.
【0009】第二に、前記減圧機構8を、特別なキャピ
ラリーチューブ等を用いずに簡易に構成するため、上記
第一の手段において、環状シール手段30を公転基板2
1に保持させると共に、給油通路7の出口部を、前記公
転基板21の背面に臨む静止部材の端面で且つ公転スク
ロール2の公転動作に伴って前記シール手段30の内周
側と外周側とに交互に位置される部位に開口させ、減圧
機構8を、前記公転スクロール2の公転動作に伴って前
記給油通路7の出口部を外周側室32に間欠的に開く間
欠連通機構81で構成した。Second, in order to easily construct the pressure reducing mechanism 8 without using a special capillary tube or the like, in the first means, the annular sealing means 30 is replaced with the revolving substrate 2.
1 and the outlet of the oil supply passage 7 is positioned at the end face of the stationary member facing the back surface of the revolving board 21 and at the inner and outer peripheral sides of the sealing means 30 with the revolving operation of the revolving scroll 2. The pressure reducing mechanism 8 is constituted by an intermittent communication mechanism 81 which is opened at alternately located portions and which opens the outlet of the oil supply passage 7 to the outer peripheral side chamber 32 intermittently with the revolving operation of the orbiting scroll 2.
【0010】第三に、上記各手段において、第一円弧溝
51及び第二円弧溝52の加工を簡易化するため、これ
ら円弧溝51,52を、固定スクロール1における外壁
13の下面に設ける。Third, in each of the above means, in order to simplify the processing of the first arc groove 51 and the second arc groove 52, these arc grooves 51, 52 are provided on the lower surface of the outer wall 13 of the fixed scroll 1.
【0011】第四に、上記各手段において、給油通路7
から各吸入ポート61,62に至る油の有効利用を図る
ため、外周側室32の内部に公転スクロール2の自転を
阻止するオルダムリング20を配設する。Fourth, in each of the above means, the oil supply passage 7
An Oldham ring 20 for preventing rotation of the revolving scroll 2 is provided inside the outer peripheral side chamber 32 in order to effectively use the oil reaching the suction ports 61 and 62.
【0012】[0012]
【作用】上記第一の手段により、外周側室32は、高圧
圧力域にある中心側室31に対して環状シール手段30
を介して区画されていると共に、減圧機構8をもつ給油
通路7を介して高圧圧力域に、又、第一及び第二円弧溝
51,52を介して低圧圧力域である吸入ポート61,
62にそれぞれ連通されている。こうして、外周側室3
2は、前記減圧機構8での減圧値に応じて高圧圧力に対
し圧力低下されることになり、この減圧機構8での減圧
値を大きくすることにより外周側室32の圧力を低圧に
近い中間圧力域に保つことができる。この場合、公転ス
クロール2を固定スクロール1に押し付けてスラスト受
部4で接触を行うための力は、高圧圧力域とした中心側
室31から十分に得ることができる。そして、外周側室
32に給油通路7から減圧機構8を介して導入された油
は、スラスト受部4上に沿って半周近くにわたって設け
た一対の対称な第一及び第二円弧溝51,52を介して
各吸入ポート61,62に供給される。こうして、スラ
スト受部4の全面を良好に潤滑することができる。しか
も、外周側室32と吸入ポート61,62間の比較的小
さな圧力差は、第一及び第二円弧溝51,52の部分で
容易に確保することができ、外周側室32から吸入ポー
ト61,62への給油量が過剰になるのも防止すること
ができる。According to the above-mentioned first means, the outer peripheral side chamber 32 is annularly sealed with the center side chamber 31 in the high pressure area.
And a suction port 61, which is a low pressure region through the oil supply passage 7 having a pressure reducing mechanism 8 and a low pressure region through the first and second arc grooves 51, 52.
62 respectively. Thus, the outer peripheral side chamber 3
2, the pressure is reduced with respect to the high pressure in accordance with the reduced pressure value in the pressure reducing mechanism 8. By increasing the reduced pressure value in the pressure reducing mechanism 8, the pressure in the outer peripheral side chamber 32 is reduced to an intermediate pressure close to the low pressure. Area can be kept. In this case, the force for pressing the orbiting scroll 2 against the fixed scroll 1 and making contact with the thrust receiving portion 4 can be sufficiently obtained from the center-side chamber 31 which is a high-pressure pressure region. Then, the oil introduced from the oil supply passage 7 to the outer peripheral side chamber 32 via the pressure reducing mechanism 8 forms a pair of symmetric first and second circular arc grooves 51 and 52 provided over a half circumference along the thrust receiving portion 4. The air is supplied to each of the suction ports 61 and 62 through the corresponding port. Thus, the entire surface of the thrust receiving portion 4 can be favorably lubricated. Moreover, a relatively small pressure difference between the outer peripheral chamber 32 and the suction ports 61, 62 can be easily secured in the first and second arc grooves 51, 52. It is also possible to prevent an excessive amount of refueling.
【0013】上記第二の手段により、外周側室32は、
第一及び第二円弧溝51,52を介して低圧の吸入ポー
ト61,62に常時連通されている一方、公転スクロー
ル2の一公転動作中に高圧の給油通路7と一時的に連通
されるのみである。又、外周側室32と給油通路7との
連通時間は、該給油通路7の出口部の開口位置により設
定される。こうして、外周側室32の圧力は、給油通路
7との連通時間に応じて設定でき、この連通時間を少な
くすることにより、外周側室32の圧力を低圧に近い中
間圧力に維持することが可能となる。しかも、外周側室
32に開放される油は給油通路7との連通時間に応じた
量に設定できることとなる。従って、給油通路7をキャ
ピラリーチューブから成る減圧機構8を介して外周側室
32に開放するものと同様な機能を果たし、逆に、この
場合、キャピラリーチューブを用いるのではないから、
構成の簡易化が図れると共に、キャピラリーチューブの
穴詰まり等を無くせ、信頼性の向上をも図れる。According to the second means, the outer peripheral side chamber 32 is
While it is always in communication with the low-pressure suction ports 61 and 62 via the first and second arc grooves 51 and 52, it is only temporarily connected to the high-pressure oil supply passage 7 during one revolution operation of the orbiting scroll 2. It is. The communication time between the outer peripheral side chamber 32 and the oil supply passage 7 is set by the opening position of the outlet of the oil supply passage 7. Thus, the pressure of the outer peripheral side chamber 32 can be set according to the communication time with the oil supply passage 7, and by reducing this communication time, the pressure of the outer peripheral side chamber 32 can be maintained at an intermediate pressure close to a low pressure. . Moreover, the amount of oil released to the outer peripheral side chamber 32 can be set to an amount according to the communication time with the oil supply passage 7. Accordingly, the oil supply passage 7 has a function similar to that of opening the oil supply passage 7 to the outer peripheral side chamber 32 through the pressure reducing mechanism 8 composed of a capillary tube. On the contrary, in this case, the capillary tube is not used.
The structure can be simplified, and the clogging of the capillary tube can be prevented, and the reliability can be improved.
【0014】上記第三の手段により、第一円弧溝51及
び第二円弧溝52の形成並びにその溝仕上げに際し、固
定渦巻体12が邪魔になることが無く、これら円弧溝5
1,52の加工を簡易化することができる。According to the third means, the fixed spiral body 12 does not hinder the formation of the first arc groove 51 and the second arc groove 52 and the finishing of the grooves.
Processing of 1, 52 can be simplified.
【0015】上記第四の手段により、外周側室32に導
入された油でオルダムリング20をの摺動部分をも潤滑
でき、給油機構の有効利用が図れる。According to the fourth means, the sliding portion of the Oldham ring 20 can be lubricated with the oil introduced into the outer peripheral side chamber 32, and the oil supply mechanism can be effectively used.
【0016】[0016]
【実施例】図1に示すスクロール形流体機械は、冷凍装
置における冷媒の圧縮機として用いるものであり、密閉
ケーシング9の内部上方に、静止部材を構成するハウジ
ング90を介して、固定基板11の前面に固定渦巻体1
2及びこの渦巻体12の外方に連続する外壁13を立設
した固定スクロール1を支持すると共に、この固定スク
ロール1の下方側に、公転基板21の前面に公転渦巻体
22を立設した公転スクロール2を対抗状に配設してい
る。前記公転基板21の背面には、公転スクロール2を
固定スクロール1に押し付ける背面室3を設けており、
前記外壁13の下面と公転基板21の前面外周部との間
に、環状のスラスト受部4を形成している。20は公転
スクロール2の自転を阻止するオルダムリングであり、
公転スクロール2に係合するキー20aとハウジング9
0に係合するキー20bとを備えている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The scroll type fluid machine shown in FIG. 1 is used as a compressor of a refrigerant in a refrigerating apparatus. A fixed substrate 11 is provided above a closed casing 9 via a housing 90 constituting a stationary member. Fixed spiral body 1 on front
2 and a revolving scroll 22 having a revolving spiral 22 on the front surface of a revolving substrate 21 below the fixed scroll 1 while supporting the fixed scroll 1 having an outer wall 13 continuous to the outside of the spiral 12. The scrolls 2 are arranged in opposition. A rear chamber 3 for pressing the orbiting scroll 2 against the fixed scroll 1 is provided on the back of the orbiting substrate 21,
An annular thrust receiving portion 4 is formed between the lower surface of the outer wall 13 and the outer peripheral portion of the front surface of the revolving board 21. Reference numeral 20 denotes an Oldham ring that prevents the orbiting scroll 2 from rotating.
Key 20a and housing 9 that engage with orbiting scroll 2
And a key 20b that engages with the key 20b.
【0017】前記密閉ケーシング9の内部下方には、ス
テータ91a及びロータ91bをもつモータ91を配設
しており、ロータ91bに直結する駆動軸92の上端部
に設ける偏心ピン92aを公転スクロール2の背面に突
設するボス筒23に嵌合している。駆動軸92の内部に
は、密閉ケーシング9の底部に溜める油溜から容積式又
は遠心式等による油ポンプで汲上げる油を通す給油穴7
0を設けており、主軸受93及びピン部軸受94等に供
給している。A motor 91 having a stator 91a and a rotor 91b is disposed below the inside of the closed casing 9. An eccentric pin 92a provided at the upper end of a drive shaft 92 directly connected to the rotor 91b is provided with an eccentric pin 92a. It is fitted to a boss tube 23 projecting from the back. Inside the drive shaft 92, an oil supply hole 7 through which oil pumped by an oil pump of a positive displacement type, a centrifugal type or the like from an oil reservoir stored at the bottom of the closed casing 9 passes.
0 is supplied to the main bearing 93 and the pin bearing 94.
【0018】こうして、吸入管95から各渦巻体12,
22の外方部に取り込む低圧ガスを該各渦巻体12,2
2間に画成する作動室6の内部で圧縮し、圧縮後の高圧
ガスを、固定スクロール1の中心部に開口する吐出穴1
4から、前記ケーシング9の内部空間を経て吐出管96
から外部に取り出すようにしている。In this way, each of the spiral bodies 12,
The low-pressure gas taken into the outer part of each of the spiral bodies 12, 2
The compressed high-pressure gas is compressed inside the working chamber 6 defined between the two, and the compressed high-pressure gas is discharged into the discharge hole 1 opened at the center of the fixed scroll 1.
4 through the internal space of the casing 9 and the discharge pipe 96
From outside.
【0019】以上の構成において、前記公転基板21の
背面とこれに臨むハウジング90との間に、前記背面室
3を中心側室31と外周側室32とに区画する円形のシ
ールリングから成る環状シール手段30を設ける。この
環状シール手段30は、公転基板21の背面に設ける環
状溝25の内部に嵌め込んでおり、公転基板21に保持
させている。In the above construction, between the back surface of the revolving board 21 and the housing 90 facing the revolving board 21, an annular sealing means comprising a circular seal ring for dividing the back chamber 3 into a center chamber 31 and an outer chamber 32. 30 are provided. The annular sealing means 30 is fitted into an annular groove 25 provided on the back surface of the revolving board 21 and is held by the revolving board 21.
【0020】そして、前記中心側室31を、偏心ピン9
2aの外周部に切欠く切欠部70aを介して前記給油穴
70に連通させると共に、ハウジング90に設ける排油
通路90aを介して前記ケーシング9の内部に連通させ
て、その内部を高圧圧力域にする。The center side chamber 31 is connected to the eccentric pin 9.
2a is communicated with the oil supply hole 70 through a cutout portion 70a cut out on the outer peripheral portion, and is communicated with the inside of the casing 9 through an oil discharge passage 90a provided in the housing 90, so that the inside is in a high pressure range. I do.
【0021】一方、図2に明示するように、固定スクロ
ール1における外壁13の下面に、各入口部51a,5
2aを前記スラスト受部4上において互いに180度変
位させ、且つそれぞれが前記スラスト受部4上に沿って
半周近くにわたり延びる一対の対称な第一円弧溝51及
び第二円弧溝52を設けて、第一円弧溝51の出口部5
1bを、固定渦巻体12の外方に位置する第一吸入ポー
ト61に、又、第二円弧溝52の出口部52bを、第一
吸入ポート61に対し180度変位し、公転渦巻体22
の外方に位置することになる第二吸入ポート62に各々
連通させて、前記外周側室32を前記第一及び第二円弧
溝51,52を介して前記各吸入ポート61,62に連
通させる。On the other hand, as clearly shown in FIG. 2, on the lower surface of the outer wall 13 of the fixed scroll 1, each of the entrance portions 51a, 5
2a is displaced by 180 degrees from each other on the thrust receiving portion 4, and a pair of symmetrical first arc grooves 51 and second arc grooves 52 are provided, each of which extends nearly half way along the thrust receiving portion 4, Exit part 5 of first arc groove 51
1b is displaced by 180 degrees with respect to the first suction port 61, and the outlet portion 52b of the second arc groove 52 is displaced by 180 degrees with respect to the first suction port 61.
The outer peripheral side chamber 32 communicates with the suction ports 61 and 62 via the first and second arc grooves 51 and 52, respectively.
【0022】そして、図1に示すように、前記外周側室
32に、前記中心側室31の底部から延びるL字形の大
径通路71及びこれに連続する小径通路72から成る給
油通路7を減圧機構8を介して開口させる。As shown in FIG. 1, an oil supply passage 7 composed of an L-shaped large-diameter passage 71 extending from the bottom of the center-side chamber 31 and a small-diameter passage 72 connected thereto is formed in the outer peripheral side chamber 32 by a pressure reducing mechanism 8. Open through.
【0023】前記減圧機構8は、給油通路7の出口部と
なる小径通路72を、前記公転基板21の背面に臨むハ
ウジング90の端面で且つ公転スクロール2の公転動作
に伴って前記シール手段30の内周側と外周側とに交互
に位置される部位に開口させることにより、前記公転ス
クロール2の公転動作に伴って前記給油通路7の出口部
が外周側室32に間欠的に開かれる間欠連通機構81で
構成している。The pressure reducing mechanism 8 moves the small-diameter passage 72 serving as an outlet of the oil supply passage 7 at the end face of the housing 90 facing the back surface of the revolving substrate 21 and the sealing means 30 with the revolving operation of the revolving scroll 2. An intermittent communication mechanism in which the outlet of the oil supply passage 7 is opened intermittently to the outer peripheral side chamber 32 in accordance with the revolving operation of the orbiting scroll 2 by being opened at a portion alternately located on the inner peripheral side and the outer peripheral side. 81.
【0024】又、外周側室32の内部には前記オルダム
リング20を配設している。The Oldham ring 20 is disposed inside the outer peripheral side chamber 32.
【0025】以上の構成により、前記外周側室32は、
高圧圧力域にある中心側室31に対して環状シール手段
30を介して区画されていると共に、減圧機構8をもつ
給油通路7を介して高圧圧力域に、又、第一及び第二円
弧溝51,52を介して低圧圧力域である吸入ポート6
1,62にそれぞれ連通されている。こうして、外周側
室32は、前記減圧機構8での減圧値に応じて高圧圧力
に対し圧力低下されることになり、この減圧機構8での
減圧値を大きくすることにより、つまり減圧機構8を構
成する間欠連通機構81における外周側室32と給油通
路7との連通時間を短くすることにより、外周側室32
の圧力を低圧に近い中間圧力域に保つことができる。こ
の場合、公転スクロール2を固定スクロール1に押し付
けてスラスト受部4で接触を行うための力は、高圧圧力
域とした中心側室31から十分に得ることができる。そ
して、外周側室32に給油通路7から減圧機構8を介し
て導入された油は、スラスト受部4上に沿って半周近く
にわたって設けた一対の対称な第一及び第二円弧溝5
1,52を介して各吸入ポート61,62に供給され
る。こうして、スラスト受部4の全面を良好に潤滑する
ことができると共に、外周側室32と吸入ポート61,
62間の比較的小さな圧力差は、第一及び第二円弧溝5
1,52の部分で容易に確保することができ、外周側室
32から吸入ポート61,62への給油量が過剰になる
のも防止することができるのである。With the above configuration, the outer peripheral side chamber 32 is
The center side chamber 31 in the high pressure region is partitioned via the annular sealing means 30, and at the high pressure region via the oil supply passage 7 having the pressure reducing mechanism 8, and the first and second arc grooves 51 are formed. , 52, the suction port 6 in the low pressure region
1, 62 respectively. Thus, the outer peripheral side chamber 32 is reduced in pressure with respect to the high pressure according to the reduced pressure value in the pressure reducing mechanism 8. By increasing the reduced pressure value in the pressure reducing mechanism 8, that is, By shortening the communication time between the outer peripheral chamber 32 and the oil supply passage 7 in the intermittent communication mechanism 81, the outer peripheral chamber 32
Can be maintained in the intermediate pressure range close to the low pressure. In this case, the force for pressing the orbiting scroll 2 against the fixed scroll 1 and making contact with the thrust receiving portion 4 can be sufficiently obtained from the center-side chamber 31 which is a high-pressure pressure region. The oil introduced from the oil supply passage 7 into the outer peripheral side chamber 32 via the pressure reducing mechanism 8 is supplied to the pair of symmetrical first and second circular grooves 5 provided over the semi-circumference along the thrust receiving portion 4.
The air is supplied to the respective suction ports 61 and 62 via the first and second ports 52. Thus, the entire surface of the thrust receiving portion 4 can be favorably lubricated, and the outer peripheral side chamber 32 and the suction port 61,
The relatively small pressure difference between the first and second arc grooves 5
It is possible to easily secure the oil at the portions 1 and 52, and it is possible to prevent the amount of oil supply from the outer peripheral side chamber 32 to the suction ports 61 and 62 from becoming excessive.
【0026】又、減圧機構8は、キャピラリーチューブ
等で構成してもよいのだが、以上のように間欠連通機構
81で構成したから、構成の簡易化が図れると共に、キ
ャピラリーチューブの穴詰まり等を無くせ、信頼性の向
上をも図れるのである。The pressure reducing mechanism 8 may be constituted by a capillary tube or the like. However, since the pressure reducing mechanism 8 is constituted by the intermittent communication mechanism 81 as described above, the structure can be simplified, and the clogging of the capillary tube can be prevented. It can be eliminated and reliability can be improved.
【0027】更に、第一円弧溝51及び第二円弧溝52
は公転スクロール2側に設けてもよかったが、以上のよ
うに固定スクロール1側に設けたから、各円弧溝51,
52の加工を簡易化することもできるのである。Further, a first arc groove 51 and a second arc groove 52
May be provided on the revolving scroll 2 side, but provided on the fixed scroll 1 side as described above.
The processing of 52 can also be simplified.
【0028】その上、外周側室32にオルダムリング2
0を配設したから、該リング20をも潤滑でき、給油機
構の有効利用も図れるのである。In addition, the Oldham ring 2 is
Since 0 is provided, the ring 20 can be lubricated, and the oil supply mechanism can be effectively used.
【0029】[0029]
【発明の効果】請求項1記載の発明によれば、第一円弧
溝51及び第二円弧溝52を介してスラスト受部4の全
体に油を良好にまわすことができ、固定スクロール1と
公転スクロール2とを円滑に摺動させることができると
共に、吸入ポート61,62に供給する油量が過剰に増
えるのを防止でき、油のかくはんロス等を低減できなが
ら各渦巻体12,22間で良好なシールを行うことがで
きる。According to the first aspect of the present invention, the oil can be satisfactorily supplied to the entire thrust receiving portion 4 via the first arc groove 51 and the second arc groove 52, and the fixed scroll 1 and the orbit can be revolved. The scroll 2 can be slid smoothly, and the amount of oil supplied to the suction ports 61 and 62 can be prevented from excessively increasing. Good sealing can be performed.
【0030】請求項2記載の発明によれば、間欠連通機
構81で減圧機構8を構成することにより、構成の簡易
化が図れると共に信頼性の向上をも図れる。According to the second aspect of the present invention, since the pressure reducing mechanism 8 is constituted by the intermittent communication mechanism 81, the structure can be simplified and the reliability can be improved.
【0031】請求項3記載の発明によれば、第一円弧溝
51及び第二円弧溝52の加工を簡易化することも可能
となる。According to the third aspect of the present invention, the processing of the first arc groove 51 and the second arc groove 52 can be simplified.
【0032】請求項4記載の発明によれば、オルダムリ
ング20の潤滑をも行え、給油機構の有効利用をも図れ
る。According to the fourth aspect of the present invention, the Oldham ring 20 can be lubricated, and the oil supply mechanism can be effectively used.
【図1】本発明スクロール形流体機械に係る上部縦断面
図。FIG. 1 is an upper longitudinal sectional view of a scroll type fluid machine of the present invention.
【図2】同スラスト受部の溝構成を示す固定スクロール
の下面図。FIG. 2 is a bottom view of a fixed scroll showing a groove configuration of the thrust receiving portion.
【図3】従来のスクロール形流体機械の上部断面図。FIG. 3 is a top sectional view of a conventional scroll type fluid machine.
【図4】従来のスラスト受部の溝構成を示す公転スクロ
ールの上面図。FIG. 4 is a top view of a revolving scroll showing a conventional groove configuration of a thrust receiving portion.
1;固定スクロール、11;固定基板、12;固定渦巻
体、13;外壁、2;公転スクロール、20;オルダム
リング、21;公転基板、22;公転渦巻体、3;背面
室、30;環状シール手段、31;中心側室、32;外
周側室、4;スラスト受部、51;第一円弧溝、52;
第二円弧溝、61,62;吸入ポート、7;給油通路、
8;減圧機構、81;間欠連通機構、9;ケーシングReference Signs List 1; fixed scroll, 11; fixed substrate, 12; fixed spiral, 13; outer wall, 2; revolving scroll, 20; Oldham ring, 21; revolving substrate, 22; revolving spiral, 3; Means, 31; center side chamber, 32; outer peripheral side chamber, 4; thrust receiving portion, 51; first arc groove, 52;
Second arc groove, 61, 62; suction port, 7;
8; decompression mechanism, 81; intermittent communication mechanism, 9; casing
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) F04C 18/02 311 F04C 29/02 311──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) F04C 18/02 311 F04C 29/02 311
Claims (4)
面に固定渦巻体12及びこの渦巻体12の外方に連続す
る外壁13を立設した固定スクロール1と、公転基板2
1の前面に公転渦巻体22を立設した公転スクロール2
とを備え、前記公転基板21の背面に、前記公転スクロ
ール2を固定スクロール1に押し付ける背面室3を設け
ると共に、前記外壁13の下面と前記公転基板21の前
面外周部との間に環状のスラスト受部4を形成したスク
ロール形流体機械において、前記公転基板21の背面と
これに臨む静止部材との間に、前記背面室3を中心側室
31と外周側室32とに区画する環状シール手段30を
設けて、前記中心側室31を高圧圧力域に連通させると
共に、前記外周側室32を、入口部を前記スラスト受部
4上において互いに180度変位させ且つそれぞれが前
記スラスト受部4上に沿って半周近くにわたり延びる一
対の対称な第一円弧溝51及び第二円弧溝52を介し
て、前記各渦巻体12,22の外方に位置する一対の吸
入ポート61,62にそれぞれ連通させる一方、前記外
周側室32に、高圧圧力域から延びる給油通路7を減圧
機構8を介して開口させたことを特徴とするスクロール
形流体機械。1. A fixed scroll 1 in which a fixed scroll 12 and an outer wall 13 continuous to the outside of the fixed scroll 12 are provided upright on a front surface of a fixed board 11 inside a casing 9;
A revolving scroll 2 having a revolving spiral body 22 erected on the front surface of the revolving scroll 2
A rear chamber 3 for pressing the orbiting scroll 2 against the fixed scroll 1 is provided on the back of the orbiting substrate 21, and an annular thrust is provided between the lower surface of the outer wall 13 and the outer peripheral portion of the front of the orbiting substrate 21. In the scroll type fluid machine in which the receiving portion 4 is formed, between the rear surface of the revolving substrate 21 and a stationary member facing the revolving substrate 21, there is provided an annular sealing means 30 for partitioning the rear chamber 3 into a central chamber 31 and an outer peripheral chamber 32. The center side chamber 31 is communicated with a high pressure area, and the outer peripheral side chamber 32 is displaced by 180 degrees with respect to the thrust receiving portion 4 at an inlet portion, and each of the outer peripheral side chambers 32 rotates halfway along the thrust receiving portion 4. A pair of suction ports 61, 62 located outside the spiral bodies 12, 22 through a pair of symmetrical first arc grooves 51 and second arc grooves 52 extending close to each other. While allowing each communicated to said outer peripheral side chamber 32, the scroll type fluid machine, characterized in that the oil supply passage 7 extending from the high pressure zone is opened through the pressure reducing mechanism 8.
させると共に、給油通路7の出口部を、前記公転基板2
1の背面に臨む静止部材の端面で且つ公転スクロール2
の公転動作に伴って前記シール手段30の内周側と外周
側とに交互に位置される部位に開口させ、減圧機構8
を、前記公転スクロール2の公転動作に伴って前記給油
通路7の出口部を外周側室32に間欠的に開く間欠連通
機構81で構成している請求項1記載のスクロール形流
体機械。2. An annular sealing means (30) is held by the revolving board (21), and an outlet of the oil supply passage (7) is connected to the revolving board (2).
1 is the end surface of the stationary member facing the back surface and the orbiting scroll 2
With the revolving operation of the seal means 30, the seal means 30 is opened at alternately located positions on the inner peripheral side and the outer peripheral side.
2. The scroll fluid machine according to claim 1, wherein an intermittent communication mechanism 81 intermittently opens an outlet portion of the oil supply passage 7 to the outer peripheral side chamber 32 in accordance with the revolving operation of the revolving scroll 2. 3.
定スクロール1における外壁13の下面に設けている請
求項1又は請求項2記載のスクロール形流体機械。3. The scroll type fluid machine according to claim 1, wherein the first arc groove 51 and the second arc groove 52 are provided on a lower surface of the outer wall 13 of the fixed scroll 1.
自転を阻止するオルダムリング20を配設している請求
項1若しくは請求項2又は請求項3記載のスクロール形
流体機械。4. The scroll type fluid machine according to claim 1, wherein an Oldham ring (20) for preventing rotation of the orbiting scroll (2) is disposed inside the outer peripheral side chamber (32).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10994092A JP2817511B2 (en) | 1992-04-28 | 1992-04-28 | Scroll type fluid machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10994092A JP2817511B2 (en) | 1992-04-28 | 1992-04-28 | Scroll type fluid machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05306689A JPH05306689A (en) | 1993-11-19 |
JP2817511B2 true JP2817511B2 (en) | 1998-10-30 |
Family
ID=14522971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10994092A Expired - Fee Related JP2817511B2 (en) | 1992-04-28 | 1992-04-28 | Scroll type fluid machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2817511B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11592022B2 (en) * | 2020-06-08 | 2023-02-28 | Hitachi-Johnson Controls Air Conditioning, Inc. | Scroll compressor and refrigeration cycle device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4503783B2 (en) * | 2000-05-11 | 2010-07-14 | パナソニック株式会社 | Scroll compressor |
KR20030070136A (en) | 2001-01-29 | 2003-08-27 | 마쯔시다덴기산교 가부시키가이샤 | Scroll compressor |
JP4727157B2 (en) * | 2004-02-27 | 2011-07-20 | 三菱重工業株式会社 | Scroll compressor |
JP4940630B2 (en) * | 2005-02-18 | 2012-05-30 | パナソニック株式会社 | Scroll expander |
JP5655850B2 (en) * | 2012-12-28 | 2015-01-21 | ダイキン工業株式会社 | Scroll compressor |
EP3779195B1 (en) * | 2018-06-11 | 2022-08-31 | Daikin Industries, Ltd. | Scroll compressor |
-
1992
- 1992-04-28 JP JP10994092A patent/JP2817511B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11592022B2 (en) * | 2020-06-08 | 2023-02-28 | Hitachi-Johnson Controls Air Conditioning, Inc. | Scroll compressor and refrigeration cycle device |
Also Published As
Publication number | Publication date |
---|---|
JPH05306689A (en) | 1993-11-19 |
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