JPH05306689A - Scroll type fluid machine - Google Patents
Scroll type fluid machineInfo
- Publication number
- JPH05306689A JPH05306689A JP10994092A JP10994092A JPH05306689A JP H05306689 A JPH05306689 A JP H05306689A JP 10994092 A JP10994092 A JP 10994092A JP 10994092 A JP10994092 A JP 10994092A JP H05306689 A JPH05306689 A JP H05306689A
- Authority
- JP
- Japan
- Prior art keywords
- scroll
- outer peripheral
- revolution
- side chamber
- peripheral side
- 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.)
- Granted
Links
Landscapes
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
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 an orbiting 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 is known as disclosed in Japanese Unexamined Patent Publication No. Sho 62-182487 and shown in FIGS. 3 and 4.
【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。In this case, inside a casing D, a fixed scroll L on the front surface of a fixed substrate K and a fixed scroll F in which an outer wall W continuous to the outside of this scroll L is erected, and a front surface of a revolution substrate M. An orbiting scroll O with an orbital spiral body N installed upright
And a rear chamber P that presses the revolution scroll O against the fixed scroll F between the rear surface of the revolution substrate M and the housing H that constitutes a stationary member, and the lower surface of the outer wall W and the outer peripheral portion of the front face of the revolution substrate M. An annular thrust receiving portion S is formed between and. Then, in the back chamber P, oil is pumped from a high-pressure oil reservoir accumulated at the bottom of the casing D through an oil supply hole provided in a drive shaft (not shown) fitted into the boss cylinder T of the revolution scroll O. It is open. In addition, on the outer periphery of the front surface of the revolution board M corresponding to the thrust receiving portion S,
As shown in FIG. 4, a circular annular groove A is provided, and a plurality of outer radial grooves B that open the annular groove A to the outside of the revolution substrate M and the annular groove A to the outside of each spiral body. There is provided an inner radial groove C communicating with a pair of suction ports X and Y located in the section.
【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。Thus, the oil introduced into the back chamber P is circulated from the outer radial groove B to the annular groove A and the inner radial groove C,
The thrust receiving portion S is lubricated, and the oil after lubricating the thrust receiving portion S is injected from the respective suction ports X and Y into the working chamber V defined between the spiral bodies, and inside the working chamber V. It is designed to improve the sealability of the.
【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, since the circular annular groove A is provided, at first glance, it may be possible that the entire thrust receiving portion S is covered with oil. Since it passes through the shortest distance between the chamber P and the suction ports X and Y with little resistance, 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, therefore. The oil is not evenly distributed over the entire thrust receiving portion S, so that there is a problem that the sliding characteristics of 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。Further, the back chamber P has a pressure drop corresponding to the pressure loss in the oil supply hole portion of the drive shaft with respect to the high-pressure oil reservoir, and an intermediate pressure range in which the pressure is high with respect to the low-pressure suction ports X and Y. On the other hand, on the other hand, the pressure in the rear chamber P needs to be high enough to generate the back pressure for pressing the orbiting scroll O against the fixed scroll F.
And a large pressure difference is generated between the low pressure suction ports X and Y, and it is extremely difficult to cause this pressure drop between the annular groove A and the radial groove portions B and C inside and outside thereof. There is also a problem that the amount of oil supplied to each of the momentum suction ports X and Y becomes excessive and the agitation loss of oil increases.
【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。In 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 distributed to the entire thrust receiving portion and supplied to the suction port. The 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。In order to achieve the above-mentioned main object, firstly, inside the casing 9, a fixed spiral body 12 is provided on the front surface of the fixed substrate 11, and the fixed spiral body 12 and the outer side of the spiral body 12 are continuous. A fixed scroll 1 having an outer wall 13 standing thereon and a revolving scroll 2 having a revolving spiral member 22 standing upright on the front surface of a revolving base plate 21 are provided, and the revolving scroll 2 is pressed against the fixed scroll 1 on the back face of the revolving base plate 21. In the scroll type fluid machine in which the back chamber 3 is provided and the 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 revolution board 21, the revolution board 21
An annular seal means 30 is provided between the rear surface of the rear surface of the center and the stationary member facing the rear surface chamber 3 to divide the rear surface chamber 3 into a center side chamber 31 and an outer peripheral side chamber 32, and communicates the center side chamber 31 with a high pressure region. The outer peripheral side chamber 32 has a pair of symmetrical first arcuate grooves 51 and second arcs whose inlet portions are displaced from each other on the thrust receiving portion 4 by 180 degrees and each extends along the thrust receiving portion 4 for nearly a half circumference. Groove 52
Through a pair of suction ports 61, 62 located outside the spiral bodies 12, 22, respectively.
An oil supply passage 7 extending from the high pressure region to the outer peripheral chamber 32.
Was opened via the pressure reducing 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。Secondly, in order to simply construct the pressure reducing mechanism 8 without using a special capillary tube or the like, in the above first means, the annular sealing means 30 is used as the revolving substrate 2.
1, and the outlet portion of the oil supply passage 7 is located at the end surface of the stationary member facing the rear surface of the revolution board 21 and at the inner peripheral side and the outer peripheral side of the sealing means 30 in accordance with the revolution movement of the revolution scroll 2. The pressure reducing mechanism 8 is constituted by an intermittent communication mechanism 81 which is opened at the alternately positioned portions and intermittently opens the outlet portion of the oil supply passage 7 to the outer peripheral side chamber 32 in accordance with the revolution movement of the revolution 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。Thirdly, in each of the above means, in order to simplify the machining 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
In order to effectively use the oil from the suction ports 61 to the suction ports 61, 62, the Oldham ring 20 that blocks the rotation of the revolution scroll 2 is disposed inside the outer peripheral chamber 32.
【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。With the above-mentioned first means, the outer peripheral chamber 32 has the annular sealing means 30 with respect to the central chamber 31 in the high pressure region.
And a suction port 61, which is a low pressure region through the oil supply passage 7 having the pressure reducing mechanism 8 and a high pressure region through the first and second circular arc grooves 51 and 52.
62 are communicated with each other. Thus, the outer chamber 3
2 is reduced in pressure 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 becomes an intermediate pressure close to low pressure. You can keep it in the area. In this case, the force for pressing the revolving scroll 2 against the fixed scroll 1 to make contact with the thrust receiving portion 4 can be sufficiently obtained from the center side chamber 31 in the high pressure region. Then, the oil introduced into the outer peripheral side chamber 32 from the oil supply passage 7 through the pressure reducing mechanism 8 passes through a pair of symmetrical first and second arcuate grooves 51, 52 provided along the thrust receiving portion 4 over a half circumference. It is supplied to each suction port 61, 62 via In this way, the entire surface of the thrust receiving portion 4 can be satisfactorily lubricated. Moreover, a relatively small pressure difference between the outer peripheral chamber 32 and the suction ports 61, 62 can be easily ensured in the first and second arcuate grooves 51, 52, and the outer peripheral chamber 32 can suck the suction ports 61, 62. It is also possible to prevent an excessive amount of oil supply to the.
【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。By the second means, the outer peripheral chamber 32 is
While always communicating with the low pressure suction ports 61, 62 via the first and second arcuate grooves 51, 52, it is only temporarily communicated with the high pressure oil supply passage 7 during one revolution of the revolution scroll 2. 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. In this way, the pressure of the outer peripheral 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 chamber 32 can be maintained at an intermediate pressure close to a low pressure. .. Moreover, the amount of oil released to the outer peripheral chamber 32 can be set to an amount corresponding to the communication time with the oil supply passage 7. Therefore, the same function as that of opening the oil supply passage 7 to the outer peripheral side chamber 32 via the pressure reducing mechanism 8 composed of a capillary tube is performed, and conversely, in this case, the capillary tube is not used,
The structure can be simplified and the capillary tube can be prevented from being clogged with holes 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。By the above-mentioned third means, the fixed spiral body 12 does not get in the way when forming the first circular arc groove 51 and the second circular arc groove 52 and finishing the groove, and these circular arc grooves 5 are formed.
It is possible to simplify the processing of 1,52.
【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。By the fourth means, the oil introduced into the outer peripheral side chamber 32 can be used to lubricate the sliding part of the Oldham ring 20, 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。DESCRIPTION OF THE PREFERRED EMBODIMENTS The scroll type fluid machine shown in FIG. 1 is used as a refrigerant compressor in a refrigerating apparatus, and a fixed substrate 11 is provided above a sealed casing 9 through a housing 90 which constitutes a stationary member. Fixed spiral body 1 on the front
2 and the fixed scroll 1 in which an outer wall 13 continuous to the outside of the spiral body 12 is erected, and a revolution spiral body 22 is erected on the front side of a revolution substrate 21 below the fixed scroll 1. The scrolls 2 are arranged to face each other. A rear chamber 3 for pressing the revolution scroll 2 against the fixed scroll 1 is provided on the rear surface of the revolution 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 revolution board 21. 20 is an Oldham ring that prevents the revolution of the revolution scroll 2.
The key 20a and the housing 9 that engage with the revolution scroll 2
A key 20b that engages 0.
【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, and an eccentric pin 92a provided on an upper end of a drive shaft 92 directly connected to the rotor 91b is provided in the revolution scroll 2. It is fitted to a boss cylinder 23 protruding from the back surface. Inside the drive shaft 92, an oil supply hole 7 through which the oil pumped by an oil pump of a positive displacement type or a centrifugal type from an oil reservoir stored in the bottom of the closed casing 9 is passed.
0 is provided and is supplied to the main bearing 93, the pin portion bearing 94, and the like.
【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, from the suction pipe 95 to each spiral body 12,
The low-pressure gas taken into the outer portion of the swirl member 22
A discharge hole 1 which is compressed in the working chamber 6 defined between the two, and which compresses high-pressure gas to the center of the fixed scroll 1
4 through the inner space of the casing 9 to the discharge pipe 96.
I take it out from the 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 structure, an annular seal means is formed between the rear surface of the revolution board 21 and the housing 90 facing the same, and is composed of a circular seal ring that divides the rear chamber 3 into a center side chamber 31 and an outer peripheral side chamber 32. 30 is provided. The annular sealing means 30 is fitted inside the annular groove 25 provided on the back surface of the revolution substrate 21 and is held by the revolution substrate 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 notch 70a that is notched in the outer periphery of the casing 2a, and is communicated with the inside of the casing 9 through an oil drainage passage 90a provided in the housing 90, so that the inside is in a high pressure region. To 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, the inlet portions 51a, 5 are provided on the lower surface of the outer wall 13 of the fixed scroll 1.
2a are displaced 180 degrees from each other on the thrust receiving portion 4, and a pair of symmetrical first arcuate grooves 51 and second arcuate grooves 52 are provided, each extending along the thrust receiving part 4 for nearly a half circumference, Outlet portion 5 of the first arc groove 51
1b is displaced to the first suction port 61 located outside the fixed spiral body 12, and the outlet portion 52b of the second arc groove 52 is displaced by 180 degrees with respect to the first suction port 61, so that the revolution spiral body 22 is rotated.
To communicate with the respective suction ports 61, 62 via the first and second arcuate grooves 51, 52.
【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, the depressurizing mechanism 8 is provided in the outer peripheral chamber 32 with an oil supply passage 7 including an L-shaped large-diameter passage 71 extending from the bottom of the center-side chamber 31 and a small-diameter passage 72 continuous with the L-shaped passage 71. 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。In the pressure reducing mechanism 8, the small-diameter passage 72 serving as the outlet portion of the oil supply passage 7 is located at the end face of the housing 90 facing the rear surface of the revolution board 21 and the sealing means 30 moves in accordance with the revolution movement of the revolution scroll 2. An intermittent communication mechanism in which the outlet portion of the oil supply passage 7 is intermittently opened to the outer peripheral side chamber 32 in association with the revolution movement of the revolution scroll 2 by opening the portion alternately located on the inner peripheral side and the outer peripheral side. It is composed of 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 construction, the outer peripheral side chamber 32 is
It is partitioned from the center side chamber 31 in the high pressure region via the annular sealing means 30, and is also in the high pressure region via the oil supply passage 7 having the pressure reducing mechanism 8 and the first and second arc grooves 51. , 52 through the suction port 6 in the low pressure range
1 and 62, respectively. In this way, the outer peripheral chamber 32 is pressure-reduced with respect to the high pressure in accordance with the decompression value in the decompression mechanism 8. By increasing the decompression value in the decompression mechanism 8, that is, the decompression mechanism 8 is configured. By shortening the communication time between the outer peripheral side chamber 32 and the oil supply passage 7 in the intermittent communication mechanism 81,
Can be maintained in an intermediate pressure range close to low pressure. In this case, the force for pressing the revolving scroll 2 against the fixed scroll 1 to make contact with the thrust receiving portion 4 can be sufficiently obtained from the center side chamber 31 in the high pressure region. Then, the oil introduced into the outer peripheral side chamber 32 from the oil supply passage 7 via the pressure reducing mechanism 8 has a pair of symmetrical first and second circular arc grooves 5 provided along the thrust receiving portion 4 for nearly a half circumference.
It is supplied to each suction port 61, 62 via 1, 52. Thus, the entire surface of the thrust receiving portion 4 can be satisfactorily lubricated, and the outer peripheral side chamber 32 and the suction port 61,
The relatively small pressure difference between 62 causes the first and second arc grooves 5 to
This can be easily secured in the portions 1, 52, and it is possible to prevent the amount of oil supplied from the outer peripheral side chamber 32 to the suction ports 61, 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 depressurizing mechanism 8 may be composed of a capillary tube or the like, but since it is composed of the intermittent communication mechanism 81 as described above, the structure can be simplified and the capillary tube is prevented from being clogged. 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, the first circular arc groove 51 and the second circular arc groove 52.
May be provided on the revolution scroll 2 side, but since it is provided on the fixed scroll 1 side as described above, each arc groove 51,
The processing of 52 can 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 attached to the outer peripheral chamber 32.
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 invention described in claim 1, oil can be satisfactorily distributed to the entire thrust receiving portion 4 through the first circular arc groove 51 and the second circular arc groove 52, and the fixed scroll 1 and the orbit. The scroll 2 can be smoothly slid, and the amount of oil supplied to the suction ports 61, 62 can be prevented from being excessively increased, so that oil stirring loss and the like can be reduced, and the scroll bodies 12, 22 can be smoothly connected to each other. 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 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 machining 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 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 vertical 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 the fixed scroll showing the groove structure 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 an upper 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 groove structure of a conventional 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DESCRIPTION OF SYMBOLS 1; Fixed scroll, 11; Fixed substrate, 12; Fixed scroll body, 13; Outer wall, 2; Revolution scroll, 20; Oldham ring, 21; Revolution substrate, 22; Revolution scroll body, 3; Back chamber, 30; Annular seal 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; oil supply passage,
8: Decompression mechanism, 81; Intermittent communication mechanism, 9: Casing
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 the front surface of a fixed substrate 11 inside a casing 9, and a revolution board 2.
An orbiting scroll 2 in which an orbital spiral body 22 is erected on the front surface of 1
And a rear chamber 3 for pressing the revolution scroll 2 against the fixed scroll 1 on the rear surface of the revolution substrate 21, and an annular thrust between the lower surface of the outer wall 13 and the outer peripheral portion of the front face of the revolution substrate 21. In the scroll type fluid machine in which the receiving portion 4 is formed, an annular sealing means 30 for partitioning the rear chamber 3 into a center side chamber 31 and an outer peripheral side chamber 32 is provided between the rear face of the revolution board 21 and a stationary member facing the revolution substrate 21. By providing the central side chamber 31 to communicate with the high pressure region, the outer peripheral side chamber 32 has its inlet portions displaced from each other by 180 degrees on the thrust receiving portion 4, and each of the outer peripheral side chamber 32 has a half circumference along the thrust receiving portion 4. A pair of suction ports 61, 62 located outside the respective spiral bodies 12, 22 via a pair of symmetrical first circular arc grooves 51 and second circular 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 seal means 30 is held on a revolution board 21, and an outlet portion of an oil supply passage 7 is connected to the revolution board 2.
1 is an end surface of a stationary member facing the back surface of the revolving scroll 2
Along with the orbital movement of the sealing means 30, the sealing means 30 is opened at a portion alternately located on the inner peripheral side and the outer peripheral side, and the pressure reducing mechanism 8
2. The scroll type fluid machine according to claim 1, wherein is constituted by an intermittent communication mechanism 81 which intermittently opens the outlet portion of the oil supply passage 7 to the outer peripheral side chamber 32 in accordance with the revolution movement of the revolution scroll 2.
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 circular arc groove 51 and the second circular arc groove 52 are provided on the 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, 2 or 3, wherein an Oldham ring 20 for preventing rotation of the revolution 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 true JPH05306689A (en) | 1993-11-19 |
| JP2817511B2 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001317474A (en) * | 2000-05-11 | 2001-11-16 | Matsushita Electric Ind Co Ltd | Scroll compressor |
| WO2002061285A1 (en) * | 2001-01-29 | 2002-08-08 | Matsushita Electric Industrial Co., Ltd. | Scroll compressor |
| JP2005240774A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | Oil supply amount control mechanism of compressor and scroll compressor |
| JP2006258093A (en) * | 2005-02-18 | 2006-09-28 | Matsushita Electric Ind Co Ltd | Scroll expansion machine |
| WO2014103204A1 (en) * | 2012-12-28 | 2014-07-03 | ダイキン工業株式会社 | Scroll compressor |
| WO2019240134A1 (en) * | 2018-06-11 | 2019-12-19 | ダイキン工業株式会社 | Scroll compressor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6755428B1 (en) * | 2020-06-08 | 2020-09-16 | 日立ジョンソンコントロールズ空調株式会社 | Scroll compressor and refrigeration cycle equipment |
-
1992
- 1992-04-28 JP JP10994092A patent/JP2817511B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001317474A (en) * | 2000-05-11 | 2001-11-16 | Matsushita Electric Ind Co Ltd | Scroll compressor |
| WO2002061285A1 (en) * | 2001-01-29 | 2002-08-08 | Matsushita Electric Industrial Co., Ltd. | Scroll compressor |
| US6935852B2 (en) | 2001-01-29 | 2005-08-30 | Matsushita Electric Industrial Co., Ltd. | Scroll compressor having a back pressure chamber comprising high and middle pressure chambers |
| JP2005240774A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | Oil supply amount control mechanism of compressor and scroll compressor |
| JP2006258093A (en) * | 2005-02-18 | 2006-09-28 | Matsushita Electric Ind Co Ltd | Scroll expansion machine |
| WO2014103204A1 (en) * | 2012-12-28 | 2014-07-03 | ダイキン工業株式会社 | Scroll compressor |
| JP2014129793A (en) * | 2012-12-28 | 2014-07-10 | Daikin Ind Ltd | Scroll compressor |
| CN104903583A (en) * | 2012-12-28 | 2015-09-09 | 大金工业株式会社 | Scroll compressor |
| WO2019240134A1 (en) * | 2018-06-11 | 2019-12-19 | ダイキン工業株式会社 | Scroll compressor |
| CN112189096A (en) * | 2018-06-11 | 2021-01-05 | 大金工业株式会社 | Scroll compressor having a discharge port |
| JPWO2019240134A1 (en) * | 2018-06-11 | 2021-05-13 | ダイキン工業株式会社 | Scroll compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2817511B2 (en) | 1998-10-30 |
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