JPH0674173A - Two-stage oil cooled compressor - Google Patents
Two-stage oil cooled compressorInfo
- Publication number
- JPH0674173A JPH0674173A JP22567192A JP22567192A JPH0674173A JP H0674173 A JPH0674173 A JP H0674173A JP 22567192 A JP22567192 A JP 22567192A JP 22567192 A JP22567192 A JP 22567192A JP H0674173 A JPH0674173 A JP H0674173A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- compressor
- cooling liquid
- stage compressor
- stage
- 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.)
- Pending
Links
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えば冷凍機,ヒート
ポンプLNG圧縮装置,注水形ガス圧縮機に適用する2
段形油冷式圧縮機に関するものである。The present invention is applied to, for example, refrigerators, heat pump LNG compressors, and water injection type gas compressors.
The present invention relates to a stepped oil-cooled compressor.
【0002】[0002]
【従来の技術】従来、ガス圧縮空間部に冷却液を噴射す
るようにした単段形油冷式スクリュ圧縮機は公知である
(特開昭60−114490号公報)。この圧縮機は、
冷却液の気化熱を利用して、ガス圧縮空間部の冷却を意
図したものである。2. Description of the Related Art Conventionally, a single-stage oil-cooled screw compressor in which a cooling liquid is injected into a gas compression space is known (Japanese Patent Laid-Open No. 60-114490). This compressor is
This is intended to cool the gas compression space portion by utilizing the heat of vaporization of the cooling liquid.
【0003】[0003]
【発明が解決しようとする課題】上記従来の装置では、
単段形の圧縮機であるため、ガス圧縮空間部に噴射した
冷却液がこの空間部に滞留する時間は極く短く、圧縮機
から吐出してから気化するようになる。この結果、冷却
液の噴射による圧縮機本体内での冷却が不十分となり、
意図した程の圧縮機の性能向上効果を得ることができな
いという問題があった。本発明は、斯る従来の問題点を
課題としてなされたもので、冷却液による圧縮機本体内
での冷却効率を高めて、圧縮機の性能向上を可能とした
2段形油冷式圧縮機を提供しようとするものである。In the above-mentioned conventional device,
Since it is a single-stage compressor, the cooling liquid injected into the gas compression space stays in this space for a very short time and vaporizes after being discharged from the compressor. As a result, cooling in the compressor body due to the injection of cooling liquid becomes insufficient,
There is a problem that the intended performance improvement effect of the compressor cannot be obtained. The present invention has been made to solve the above-mentioned conventional problems, and a two-stage oil-cooled compressor capable of improving the performance of the compressor by increasing the cooling efficiency of the cooling liquid in the compressor body. Is to provide.
【0004】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、第1段圧縮機本体と、この第1段圧縮機
本体のロータと同軸回転させるようにしたロータを有す
る第2段圧縮機本体と、第1,第2段圧縮機本体間の中
間流路に設けた第1油分離回収器と、第2段圧縮機本体
の吐出口に続く流路に設けた第2油分離回収器と、第
1,第2油分離回収器の下部の油溜まり部から少なくと
も油冷却器を介して第1,第2圧縮機本体内の注油箇所
に油を供給する油供給流路と、第1油分離回収器と第2
圧縮機本体との間の中間流路の部分に冷却液を噴射する
冷却液供給流路とを設けて形成した。In order to solve the above-mentioned problems, the present invention has a second stage having a first stage compressor body and a rotor adapted to rotate coaxially with the rotor of the first stage compressor body. Stage compressor body, a first oil separating and collecting device provided in an intermediate flow path between the first and second stage compressor bodies, and a second oil provided in a flow path following the discharge port of the second stage compressor body A separation / recovery device, and an oil supply flow path for supplying oil from an oil sump portion below the first and second oil separation / recovery devices to at least an oil cooler in the first and second compressor bodies. , 1st oil separation and recovery device and 2nd
A cooling liquid supply flow passage for injecting the cooling liquid is provided in the intermediate flow passage portion between the compressor body and the compressor body.
【0005】[0005]
【作用】上記発明のように構成することにより、冷却液
の圧縮機本体内での滞留時間が十分長くなり、第1段圧
縮機本体内で昇温した油を分離した後の圧縮ガスの冷却
にのみ冷却液の気化熱が利用されるようになる。With the above structure, the residence time of the cooling liquid in the compressor body is sufficiently long, and the compressed gas is cooled after the oil heated in the first stage compressor body is separated. Only the heat of vaporization of the cooling liquid is used.
【0006】[0006]
【実施例】次に、本発明の一実施例を図面にしたがって
説明する。図1,2は、本発明に係る2段形油冷式スク
リュ圧縮機を適用した冷凍機を示し、第1段圧縮機本体
1と、この第1段圧縮機本体1のスクリュロータ2とロ
ータ軸3を共通にして、同軸回転させるようにしたスク
リュロータ4を有する第2段圧縮機本体5とが設けてあ
る。第1,第2段圧縮機本体1,5間の中間流路6には
第1油分離回収器7が、また第2段圧縮機本体5の吐出
口8に続く流路9には第2油分離回収器10が設けてあ
る。第1,第2油分離回収器6,10の下部の油溜まり
部11,12には、油ポンプ13,油フィルタ14,油
冷却器15を介して第1,第2圧縮機本体1,5内の図
示しない軸受,軸封部およびガス圧縮空間部等の注油箇
所に油を供給する油供給流路16が接続してある。An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a refrigerator to which a two-stage oil-cooled screw compressor according to the present invention is applied. A first-stage compressor body 1, a screw rotor 2 and a rotor of the first-stage compressor body 1 are shown. There is provided a second stage compressor body 5 having a screw rotor 4 which is coaxially rotated with the shaft 3 in common. A first oil separation / collector 7 is provided in the intermediate flow path 6 between the first and second stage compressor bodies 1 and 5, and a second oil separation and recovery device 7 is provided in the flow path 9 following the discharge port 8 of the second stage compressor body 5. An oil separator / collector 10 is provided. The first and second compressor bodies 1 and 5 are connected to the oil sump portions 11 and 12 below the first and second oil separation and recovery units 6 and 10 via an oil pump 13, an oil filter 14, and an oil cooler 15. An oil supply passage 16 for supplying oil is connected to the oil-filling points such as a bearing, a shaft seal portion, and a gas compression space portion, which are not shown.
【0007】さらに、第2油分離回収器10の上部から
は凝縮器17,膨張弁18,蒸発器19を経て第1段圧
縮機本体1の吸込口20に至る流路21が接続してあ
る。凝縮器17内で凝縮した冷媒液を溜める受液部22
には、ここから第1油分離回収器7と第2段圧縮機本体
5との間の中間流路6の部分に冷媒液を導くための冷却
液供給流路23が接続してある。この冷却液供給流路2
3の中間流路6との接続部先端にはノズル24が設けて
あり、中間流路6内に冷媒液を噴射するようになってい
る。なお、図1においてロータ軸3は中間部を省略して
表してあるが、実際には第1段圧縮機本体1から第2段
圧縮機本体5まで連続しており、また、※印同志は連続
していることを表している。Further, a passage 21 is connected from the upper portion of the second oil separation / recovery device 10 through the condenser 17, the expansion valve 18 and the evaporator 19 to the suction port 20 of the first stage compressor body 1. . Liquid receiving portion 22 for storing the refrigerant liquid condensed in the condenser 17
A cooling liquid supply flow path 23 for guiding the refrigerant liquid from here to the portion of the intermediate flow path 6 between the first oil separation / recovery device 7 and the second stage compressor body 5 is connected. This cooling liquid supply channel 2
Nozzle 24 is provided at the tip of the connecting portion of the intermediate flow path 3 to the intermediate flow path 6, and the refrigerant liquid is injected into the intermediate flow path 6. In FIG. 1, the rotor shaft 3 is shown with the middle part omitted, but it is actually continuous from the first-stage compressor body 1 to the second-stage compressor body 5, and It means that they are continuous.
【0008】次に、上記構成からなる装置の作動につい
て説明する。まず、第1段圧縮機本体1の吸込口20よ
り吸込んだ冷媒ガスを、油供給流路16から冷却,シー
ルおよび潤滑のために油の注入を受けつつ圧縮して、こ
の油とともに中間流路6に吐出させる。中間流路6では
第1油分離回収器7にて、冷媒ガスからこの圧縮熱によ
り昇温した油を分離して、油は油溜まり部11に回収す
る。なお、第1段圧縮機本体1の軸受,軸封部に注入さ
れた油も最終的には、圧縮冷媒ガスとともに中間流路6
に吐出され油溜まり部11に回収される。Next, the operation of the device having the above structure will be described. First, the refrigerant gas sucked from the suction port 20 of the first-stage compressor body 1 is compressed while being injected with oil for cooling, sealing, and lubrication from the oil supply flow passage 16, and the intermediate gas is flowed together with this oil. 6 is discharged. In the intermediate flow path 6, the first oil separation / recovery device 7 separates the oil whose temperature is raised by the compression heat from the refrigerant gas, and collects the oil in the oil sump 11. The oil injected into the bearing and the shaft seal portion of the first-stage compressor body 1 is finally compressed along with the compressed refrigerant gas into the intermediate passage 6
And is collected in the oil sump 11.
【0009】さらに、第1油分離回収器7の出側にて、
凝縮器17の受液部22から冷却液供給流路23を経て
導かれた冷媒液を噴射して、圧縮されて昇温した冷媒ガ
スとともに冷媒液を第2段圧縮機本体5に吸込ませ、こ
こでも油供給流路16から油の注入を受けつつ冷媒ガス
を圧縮し、この過程で冷媒液を気化させ、その後吐出口
8より圧縮状態の冷媒ガスとともに油を吐出して第2油
分離回収器10に至らせている。ここで、噴射された冷
媒ガスの吐出口に至るまでの滞留時間は十分長くなって
おり、その間に冷媒液は完全に気化するとともに、第1
段圧縮機本体1にて昇温した油は第1油分離回収器7に
て分離されている故、気化熱が第1段圧縮機本体1から
の油の冷却のために使われることなく、圧縮される冷媒
ガスの冷却に効率よく使われることとなる。Further, on the outlet side of the first oil separating and collecting unit 7,
The refrigerant liquid guided from the liquid receiving portion 22 of the condenser 17 through the cooling liquid supply flow path 23 is jetted, and the refrigerant liquid is sucked into the second stage compressor body 5 together with the compressed and heated refrigerant gas. Again, the refrigerant gas is compressed while being injected with oil from the oil supply channel 16, the refrigerant liquid is vaporized in this process, and then the oil is discharged from the discharge port 8 together with the compressed refrigerant gas, and the second oil separation and recovery is performed. It reaches the vessel 10. Here, the residence time of the injected refrigerant gas until reaching the discharge port is sufficiently long, during which the refrigerant liquid is completely vaporized and
Since the oil whose temperature has been raised in the first-stage compressor body 1 is separated in the first oil separation / collector 7, the heat of vaporization is not used for cooling the oil from the first-stage compressor body 1, It will be efficiently used for cooling the compressed refrigerant gas.
【0010】第2油分離回収器10にて、冷媒ガスと油
とを分離して、油は油溜まり部12に回収し、冷媒ガス
は流路21より凝縮器17に送り出す。なお、第2段圧
縮機本体5の軸受,軸封部に注入された油も、上記同様
に、最終的には圧縮冷媒ガスとともに流路9に吐出され
油溜まり部12に回収される。凝縮器17では、周知の
ように、冷媒ガスを凝縮させることにより、図示しない
外部熱源(高温側)を昇温させ、凝縮液は受液部22に
一旦溜める一方、膨張弁18および蒸発器19にて冷媒
液を蒸発させることにより、外部熱源(低温側)を冷却
するようになっている。蒸発器19で蒸発した冷媒ガス
は第1段圧縮機本体1に吸込まれ、以後上記同様に、グ
ロズドループを循環する。In the second oil separation and recovery device 10, the refrigerant gas and the oil are separated, the oil is recovered in the oil sump 12, and the refrigerant gas is sent out to the condenser 17 through the flow path 21. The oil injected into the bearing and the shaft seal portion of the second stage compressor body 5 is finally discharged into the flow passage 9 together with the compressed refrigerant gas and collected in the oil sump portion 12 as in the above. In the condenser 17, as is well known, the refrigerant gas is condensed to raise the temperature of an external heat source (high temperature side) not shown, and the condensed liquid is temporarily stored in the liquid receiving section 22, while the expansion valve 18 and the evaporator 19 are The external heat source (low temperature side) is cooled by evaporating the refrigerant liquid at. The refrigerant gas evaporated in the evaporator 19 is sucked into the first stage compressor body 1 and then circulates in the gloss loop in the same manner as above.
【0011】油溜まり部11,12の油は、油ポンプ1
3,油フィルタ14を経て、油冷却器15にて冷却され
た後、上記注油箇所に送られ、以後上記同様にして循環
使用に供される。受液部22の冷媒液の一部は、上述し
たように冷却液供給流路23,ノズル24を経て中間流
路6内に噴射される。このように、第1段圧縮機本体1
では油冷却し、第1段圧縮機本体1を出た所で昇温した
油を冷媒ガスから分離することにより、中間流路6では
最終的に冷却したい冷媒ガスのみを残すようになってい
る。また、その後、中間流路6に冷媒液を噴射すること
により、この冷媒液が第2圧縮機本体5から吐出される
までの滞留時間を十分長くとって、冷媒液を完全に気化
させ、気化熱が油の冷却のために使われることなく、圧
縮される冷媒ガスの冷却のために十分長い時間をかけて
有効に使われる、この結果圧縮機の性能が向上が可能と
なっている。The oil in the oil sumps 11 and 12 is supplied to the oil pump 1.
3, After passing through the oil filter 14 and being cooled by the oil cooler 15, the oil is sent to the above-mentioned lubrication point, and thereafter circulated and used similarly. A part of the refrigerant liquid in the liquid receiving section 22 is jetted into the intermediate flow path 6 via the cooling liquid supply flow path 23 and the nozzle 24 as described above. In this way, the first stage compressor body 1
Then, the oil is cooled, and the oil whose temperature has risen at the place of exiting the first-stage compressor body 1 is separated from the refrigerant gas, so that only the refrigerant gas to be finally cooled remains in the intermediate flow path 6. . After that, by injecting the refrigerant liquid into the intermediate flow path 6, the residence time until the refrigerant liquid is discharged from the second compressor main body 5 is sufficiently long to completely vaporize the refrigerant liquid and vaporize it. The heat is not used to cool the oil, but is effectively used for a sufficiently long time to cool the refrigerant gas to be compressed. As a result, the performance of the compressor can be improved.
【0012】ところで、冷媒液供給流路23に流量調節
弁を設けて、中間流路6に噴射する冷媒液量を調節でき
るようにして、吐出ガス温度を調節して、冷房時の容量
制御可能に形成してもよい。なお、上記実施例では、ス
クリュ圧縮機について説明したが、本発明はこれに限定
するものでなく、適用例として冷凍機に限定するもので
はない。また、中間流路に冷却液を供給する冷却液供給
流路として、受液部22からのものに限定するものでな
く、冷却水を噴射するようにしたものであってもよい。By the way, a flow rate control valve is provided in the refrigerant liquid supply passage 23 so that the amount of the refrigerant liquid injected into the intermediate passage 6 can be adjusted, and the discharge gas temperature can be adjusted to control the capacity during cooling. You may form in. Although the screw compressor has been described in the above embodiment, the present invention is not limited to this, and is not limited to a refrigerator as an application example. Further, the cooling liquid supply flow path for supplying the cooling liquid to the intermediate flow path is not limited to the one from the liquid receiving section 22, but may be one in which cooling water is jetted.
【0013】[0013]
【発明の効果】以上の説明より明らかなように、本発明
によれば、第1段圧縮機本体と、この第1段圧縮機本体
のロータと同軸回転させるようにしたロータを有する第
2段圧縮機本体と、第1,第2段圧縮機本体間の中間流
路に設けた第1油分離回収器と、第2段圧縮機本体の吐
出口に続く流路に設けた第2油分離回収器と、第1,第
2油分離回収器の下部の油溜まり部から少なくとも油冷
却器を介して第1,第2圧縮機本体内の注油箇所に油を
供給する油供給流路と、第1油分離回収器と第2圧縮機
本体との間の中間流路の部分に冷却液を噴射する冷却液
供給流路とを設けて形成してある。As is apparent from the above description, according to the present invention, the second stage having the first stage compressor body and the rotor adapted to rotate coaxially with the rotor of the first stage compressor body. A compressor body, a first oil separation / collector provided in an intermediate flow passage between the first and second stage compressor bodies, and a second oil separation provided in a flow passage that follows the discharge port of the second stage compressor body. A collector and an oil supply flow path for supplying oil from an oil sump below the first and second oil separation / collectors to an oil injection point in the first and second compressor bodies via at least an oil cooler; A cooling liquid supply passage for injecting a cooling liquid is provided in the intermediate passage portion between the first oil separation / recovery device and the second compressor body.
【0014】このため、第1段圧縮機本体では油冷却
し、第1段圧縮機本体を出た所で昇温した油を被圧縮ガ
スから分離することにより、中間流路では最終的に冷却
したい被圧縮ガスのみを残し、その後、中間流路に冷却
液を噴射することにより、この冷却液が第2圧縮機本体
から吐出されるまでの滞留時間を十分長くとって、冷却
液を完全に気化させ、気化熱が油の冷却のために使われ
ることなく、圧縮される冷媒ガスの冷却のために十分長
い時間をかけて有効に使われようにして、この結果圧縮
機の性能を向上させることが可能になるという効果を奏
する。Therefore, by cooling the oil in the main body of the first stage compressor and separating the oil whose temperature has risen from the main body of the first stage compressor from the gas to be compressed, the intermediate flow passage is finally cooled. By leaving only the gas to be compressed, and then injecting the cooling liquid into the intermediate flow passage, the residence time until the cooling liquid is discharged from the second compressor main body is sufficiently long to completely remove the cooling liquid. Evaporate and allow the heat of vaporization not to be used to cool the oil, but to be used effectively for a sufficiently long time to cool the compressed refrigerant gas, thus improving the performance of the compressor There is an effect that it becomes possible.
【図1】 本発明に係る2段形油冷式圧縮機を適用した
冷凍機の全体構成図である。FIG. 1 is an overall configuration diagram of a refrigerator to which a two-stage oil-cooled compressor according to the present invention is applied.
【図2】 図2に示す2段形油冷式圧縮機の一部を示す
概略断面図である。FIG. 2 is a schematic cross-sectional view showing a part of the two-stage oil-cooled compressor shown in FIG.
1 第1段圧縮機本体 5 第2段圧縮機本体 6 中間流路 7 第1油分離回収器 8 吐出口 9 流路 10 第2油分離回収器 11,12 油溜まり部 15 油冷却器 16 油供給流路 23 冷却液供給流路 1 1st-stage compressor main body 5 2nd-stage compressor main body 6 Intermediate flow path 7 1st oil separation and recovery device 8 Discharge port 9 Flow path 10 2nd oil separation and recovery device 11, 12 Oil reservoir 15 Oil cooler 16 Oil Supply channel 23 Coolant supply channel
Claims (1)
本体のロータと同軸回転させるようにしたロータを有す
る第2段圧縮機本体と、第1,第2段圧縮機本体間の中
間流路に設けた第1油分離回収器と、第2段圧縮機本体
の吐出口に続く流路に設けた第2油分離回収器と、第
1,第2油分離回収器の下部の油溜まり部から少なくと
も油冷却器を介して第1,第2圧縮機本体内の注油箇所
に油を供給する油供給流路と、第1油分離回収器と第2
圧縮機本体との間の中間流路の部分に冷却液を噴射する
冷却液供給流路とを設けて形成したことを特徴とする2
段形油冷式圧縮機。1. A first-stage compressor body, a second-stage compressor body having a rotor adapted to rotate coaxially with the rotor of the first-stage compressor body, and between the first and second-stage compressor bodies. First oil separation and recovery device provided in the intermediate flow path of the second, the second oil separation and recovery device provided in the flow path following the discharge port of the second stage compressor body, and the lower part of the first and second oil separation and recovery devices An oil supply passage for supplying oil from the oil sump portion of the first oil compressor to at least the oil cooler in the first and second compressor bodies, the first oil separation and recovery device, and the second oil recovery device.
A cooling liquid supply flow passage for injecting a cooling liquid is provided in an intermediate flow passage portion between the compressor main body and the compressor main body, which is characterized in that
Stepped oil-cooled compressor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22567192A JPH0674173A (en) | 1992-08-25 | 1992-08-25 | Two-stage oil cooled compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22567192A JPH0674173A (en) | 1992-08-25 | 1992-08-25 | Two-stage oil cooled compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0674173A true JPH0674173A (en) | 1994-03-15 |
Family
ID=16832963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22567192A Pending JPH0674173A (en) | 1992-08-25 | 1992-08-25 | Two-stage oil cooled compressor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0674173A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012167608A (en) * | 2011-02-15 | 2012-09-06 | Kobe Steel Ltd | Two-stage screw compression type refrigerating device |
CN103362813A (en) * | 2013-07-22 | 2013-10-23 | 徐道敏 | Two-stage compression single-screw air compressor and work method thereof |
JP2020007982A (en) * | 2018-07-10 | 2020-01-16 | 日立ジョンソンコントロールズ空調株式会社 | Two-stage screw fluid machine |
CN111981714A (en) * | 2019-05-21 | 2020-11-24 | 开利公司 | Refrigeration device |
KR20210047352A (en) * | 2018-09-25 | 2021-04-29 | 아틀라스 캅코 에어파워, 남로체 벤누트삽 | Oil-injected multi-stage compressor arrangement and method for controlling such compressor arrangement |
-
1992
- 1992-08-25 JP JP22567192A patent/JPH0674173A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012167608A (en) * | 2011-02-15 | 2012-09-06 | Kobe Steel Ltd | Two-stage screw compression type refrigerating device |
CN103362813A (en) * | 2013-07-22 | 2013-10-23 | 徐道敏 | Two-stage compression single-screw air compressor and work method thereof |
JP2020007982A (en) * | 2018-07-10 | 2020-01-16 | 日立ジョンソンコントロールズ空調株式会社 | Two-stage screw fluid machine |
KR20210047352A (en) * | 2018-09-25 | 2021-04-29 | 아틀라스 캅코 에어파워, 남로체 벤누트삽 | Oil-injected multi-stage compressor arrangement and method for controlling such compressor arrangement |
JP2022500591A (en) * | 2018-09-25 | 2022-01-04 | アトラス コプコ エアーパワー, ナームローゼ フェンノートシャップATLAS COPCO AIRPOWER, naamloze vennootschap | Oil-injection multi-stage compressor devices and methods for controlling such compressor devices |
CN111981714A (en) * | 2019-05-21 | 2020-11-24 | 开利公司 | Refrigeration device |
CN111981714B (en) * | 2019-05-21 | 2023-10-13 | 开利公司 | Refrigerating apparatus |
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