JP2005069062A - Oil injection type screw compressor - Google Patents

Oil injection type screw compressor Download PDF

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JP2005069062A
JP2005069062A JP2003297709A JP2003297709A JP2005069062A JP 2005069062 A JP2005069062 A JP 2005069062A JP 2003297709 A JP2003297709 A JP 2003297709A JP 2003297709 A JP2003297709 A JP 2003297709A JP 2005069062 A JP2005069062 A JP 2005069062A
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oil
motor
compressor
screw compressor
cooling
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Masaki Matsukuma
正樹 松隈
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Kobe Steel Ltd
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Kobe Steel Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil injection type screw compressor of good motor cooling efficiency and a simple structure without reducing suction efficiency. <P>SOLUTION: In the oil injection type screw compressor having a main body casing part 13 storing a male and female pair of screw rotors 11, 12 meshing each other and a motor casing part 15 of a motor 14 driving the screw rotors 11, 12 integrally and air-tightly formed and provided with a compressor main body 2 adopting a semi hermetic casing 16 divided into a space in the main body casing part 13 and a space in the motor casing part 15 by a partition wall 17, an oil flow in part 33 making cooling oil flow in the motor casing part 15 from outside and an oil flow out part 38A leading cooling oil in the motor casing 15 into the compressor main body 2 are provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、圧縮機本体ケーシングとモーターケーシングとが一体的かつ気密に形成された半密閉ケーシングを有する液冷式モータを用いた油冷式スクリュ圧縮機に関するものである。   The present invention relates to an oil-cooled screw compressor using a liquid-cooled motor having a semi-hermetic casing in which a compressor main body casing and a motor casing are integrally and airtightly formed.

従来、圧縮機本体ケーシングとモーターケーシングとが一体的かつ気密に形成された半密閉ケーシングを有し、モータを冷媒ガスにより冷却するようにした冷凍機用の半密閉型スクリュ圧縮機は公知である（例えば、特許文献１参照。）。この半密閉型スクリュ圧縮機では、モーターケーシングの一端より冷媒ガスを圧縮機吸込口に向けて吸引させて、この圧縮機吸込口から吸込まれる前の冷媒ガスによりモータが冷却するようになっている。
この冷媒ガスによる冷却方式を採用すると、冷却目的のためにモータの構造自体を複雑にしなくても済む。しかし、このスクリュ圧縮機の場合、冷媒ガスがモータ内での発生熱を吸収することにより昇温し、その体積が膨張する結果、スクリュ圧縮機の吸込み効率が悪くなり、性能低下を招くという欠点がある。 Conventionally, a semi-hermetic screw compressor for a refrigerator having a semi-sealed casing in which a compressor main body casing and a motor casing are integrally and airtightly formed and the motor is cooled by a refrigerant gas is known. (For example, refer to Patent Document 1). In this semi-hermetic screw compressor, the refrigerant gas is sucked from one end of the motor casing toward the compressor suction port, and the motor is cooled by the refrigerant gas before being sucked from the compressor suction port. Yes.
When this cooling method using refrigerant gas is employed, the motor structure itself does not have to be complicated for cooling purposes. However, in the case of this screw compressor, the refrigerant gas rises in temperature by absorbing the heat generated in the motor, and as a result, the volume of the refrigerant expands. As a result, the suction efficiency of the screw compressor is deteriorated and the performance is reduced. There is.

これに対して、冷却ジャケットにより冷却する液冷式モータを用いれば、上述した欠点は回避できるが、この液冷式モータを用いた半密閉型スクリュ圧縮機は公知である（例えば、特許文献２参照。）。
この半密閉型スクリュ圧縮機の液冷式モータでは、そのモータケーシングの外周部が冷却ジャケットで包囲され、この冷却ジャケット内に冷却した水、油、或いは液状態の冷媒が流動させられるようになっている。
特開平１１−３５１１６８号公報 特開２０００−９７１８６号公報 On the other hand, if the liquid cooling motor cooled by the cooling jacket is used, the above-mentioned drawbacks can be avoided, but a semi-hermetic screw compressor using this liquid cooling motor is known (for example, Patent Document 2). reference.).
In the liquid-cooled motor of the semi-hermetic screw compressor, the outer periphery of the motor casing is surrounded by a cooling jacket, and cooled water, oil, or liquid refrigerant is allowed to flow in the cooling jacket. ing.
JP-A-11-351168 JP 2000-97186 A

上記特許文献２に開示の液冷式モータの場合、モーターケーシングの内部における発生熱をモーターケーシングの外周部を包囲する冷却ジャケット内の液体により吸収、除去する間接冷却となっている。このため、冷却効率が悪いだけでなく、冷却ジャケット付きモーターケーシングの製造工程及びその構造が複雑になるという問題がある。
本発明は斯かる従来の問題をなくすことを課題としてなされたもので、冷却効率が良好で、かつ単純な構造の液冷式モータを提供しようとするものである。 In the case of the liquid-cooled motor disclosed in Patent Document 2, the heat generated in the motor casing is indirectly cooled by absorbing and removing the generated heat in the cooling jacket surrounding the outer periphery of the motor casing. For this reason, there is a problem that not only the cooling efficiency is poor, but also the manufacturing process and the structure of the motor casing with the cooling jacket are complicated.
The present invention has been made in order to eliminate such a conventional problem, and an object of the present invention is to provide a liquid-cooled motor having a good cooling efficiency and a simple structure.

上記課題を解決するために、第１発明は、互いに噛合う雌雄一対のスクリュロータを収容した本体ケーシング部と上記スクリュロータを駆動するモータのモーターケーシング部とが一体的かつ気密に形成され、上記本体ケーシング部内の空間と上記モーターケーシング部内の空間とが隔壁により仕切られた半密閉ケーシングを採用した圧縮機本体を備えた油冷式スクリュ圧縮機において、上記モーターケーシング部に外部から冷却油を流入させる油流入部と、上記モータ内の冷却を必要とする部位が上記冷却油に浸漬した状態を維持しつつ、上記モーターケーシング部内の冷却油を上記圧縮機本体内に導く油流出部とを設けた構成とした。   In order to solve the above-mentioned problem, the first invention is characterized in that a main body casing portion accommodating a pair of male and female screw rotors that mesh with each other and a motor casing portion of a motor that drives the screw rotor are integrally and airtightly formed. In an oil-cooled screw compressor equipped with a compressor body that employs a semi-hermetic casing in which the space in the main casing and the space in the motor casing are partitioned by a partition wall, cooling oil flows into the motor casing from the outside. And an oil outflow portion that guides the cooling oil in the motor casing portion into the compressor body while maintaining a state in which the portion requiring cooling in the motor is immersed in the cooling oil. The configuration was as follows.

第２発明は、第１発明の構成に加えて、上記油流出部が、上記隔壁に形成された貫通孔の上記モータ側開口端を入口とし、上記スクリュロータの吸込み側のロータ軸と上記隔壁との間の微小空間を経て、上記スクリュロータの収容空間に通じる構成とした。   According to a second invention, in addition to the configuration of the first invention, the oil outflow portion has the motor side opening end of a through hole formed in the partition as an inlet, and the rotor shaft on the suction side of the screw rotor and the partition Through a minute space between the screw rotor and the housing space of the screw rotor.

第３発明は、第１発明または第２発明の構成に加えて、上記油流出部が、上記隔壁を経由することなく、上記圧縮機本体内に至る冷却油流路を含む構成とした。   In the third aspect of the invention, in addition to the structure of the first aspect of the invention or the second aspect of the invention, the oil outflow portion includes a cooling oil passage that reaches the inside of the compressor body without passing through the partition wall.

第４発明は、第１発明から第３発明のいずれかの構成に加えて、上記油流入部が、上記圧縮機本体の吐出側に設けられる油分離回収器の下部から油冷却器を介して延びる油流路に接続された構成とした。   According to a fourth aspect of the invention, in addition to any one of the first to third aspects of the invention, the oil inflow portion is provided from the lower part of an oil separator / collector provided on the discharge side of the compressor body via an oil cooler. It was set as the structure connected to the extending oil flow path.

上記構成により、吸込み効率を低下させることなく、モータ冷却の効率が良好で、かつ単純な構造にすることが可能になるという効果を奏する。   With the above configuration, the motor cooling efficiency is good and the structure can be simplified without reducing the suction efficiency.

図１は本発明に係る油冷式スクリュ圧縮機１Ａを示し、図２はこの油冷式スクリュ圧縮機１Ａの圧縮機本体２の詳細を示している。圧縮機本体２の一方には、吸込流路３が接続し、他方には油分離回収器４を介在させた吐出流路５が接続している。油分離回収器４内の上部には油分離エレメント６が設けられ、下部は油溜り部７となっており、この油溜り部７から油冷却器８を経て、以下、詳述するように圧縮機本体２内に冷却油を導く油流路９が延びている。   FIG. 1 shows an oil-cooled screw compressor 1A according to the present invention, and FIG. 2 shows details of a compressor body 2 of the oil-cooled screw compressor 1A. A suction flow path 3 is connected to one side of the compressor body 2, and a discharge flow path 5 with an oil separation / recovery device 4 interposed is connected to the other side. An oil separation element 6 is provided in the upper part of the oil separator / collector 4, and a lower part is an oil reservoir 7. The oil reservoir 7 passes through the oil cooler 8 and is compressed as described in detail below. An oil flow path 9 for guiding cooling oil extends into the machine body 2.

圧縮機本体２は、互いに噛合う雌雄一対のスクリュロータ１１，１２を収容した本体ケーシング部１３とスクリュロータ１１，１２を駆動するモータ１４のモーターケーシング部１５とが一体的かつ気密に形成された半密閉ケーシング１６を備え、その本体ケーシング部１３内の空間とモーターケーシング部１５内の空間とは隔壁１７により仕切られている。本体ケーシング部１３内におけるスクリュロータ１１，１２の収容空間の一方には吸込流路３に通じる吸込口２１が形成され、他方には吐出流路５に通じる吐出口２２が形成されている。また、スクリュロータ１１，１２の吸込み側のロータ軸１１Ｓ，１２Ｓは軸受２３，２４により、また吐出側のロータ軸１１Ｄ，１２Ｄは軸受２５，２６によりそれぞれ回転可能に支持されている。この吐出側のロータ軸１１Ｄ，１２Ｄには本体ケーシング部１３に穿設され、油流路９の分岐部９ａに接続された注油孔２７より油が注入されるようになっている。   In the compressor main body 2, a main body casing portion 13 that houses a pair of male and female screw rotors 11 and 12 and a motor casing portion 15 of a motor 14 that drives the screw rotors 11 and 12 are integrally and airtightly formed. A semi-sealed casing 16 is provided, and a space in the main body casing portion 13 and a space in the motor casing portion 15 are partitioned by a partition wall 17. A suction port 21 leading to the suction flow path 3 is formed in one of the housing spaces of the screw rotors 11, 12 in the main body casing portion 13, and a discharge port 22 leading to the discharge flow path 5 is formed in the other. The rotor shafts 11S and 12S on the suction side of the screw rotors 11 and 12 are rotatably supported by bearings 23 and 24, and the rotor shafts 11D and 12D on the discharge side are rotatably supported by bearings 25 and 26, respectively. The discharge-side rotor shafts 11 </ b> D and 12 </ b> D are bored in the main body casing portion 13, and oil is injected from an oil injection hole 27 connected to the branch portion 9 a of the oil flow path 9.

スクリュロータ１１，１２の一方、例えば雄側のスクリュロータ１２のロータ軸１２Ｓはモータ１４の回転子３１から突出した出力軸３２と一体回転可能に設けられ、スクリュロータ１２がこの出力軸３２を介してモータ１４により駆動され、このスクリュロータ１２を介して、これと噛合うスクリュロータ１１が駆動される。   One of the screw rotors 11, 12, for example, the rotor shaft 12 </ b> S of the male screw rotor 12 is provided so as to be able to rotate integrally with an output shaft 32 protruding from the rotor 31 of the motor 14. Then, the screw rotor 11 is driven through the screw rotor 12 and engaged with the screw rotor 11.

一方、隔壁１７に対向するモーターケーシング部１５の端部には、油流路９の分岐部９ｂに接続し、モーターケーシング部１５内に油を導入する油流入部３３が設けられ、モータ１４の固定子３４が位置するモーターケーシング部１５の内周部には、螺旋溝３５が刻設されている。さらに、隔壁１７には、貫通孔３６，３７及び吸込み側のロータ軸１１Ｓ，１２Ｓと隔壁１７との間の微小空間を経て、スクリュロータ１１，１２の収容空間に通じる油流出部３８Ａが形成されている。
なお、油流路９からの冷却油は、上述した吸込み側のロータ軸１１Ｓ，１２Ｓ、吐出側のロータ軸１１Ｄ，１２Ｄの箇所の他に、油流路９の分岐部９ｃを経てスクリュロータ１１，１２の歯溝部にも供給される。 On the other hand, at the end of the motor casing portion 15 facing the partition wall 17, an oil inflow portion 33 that connects to the branch portion 9 b of the oil passage 9 and introduces oil into the motor casing portion 15 is provided. A spiral groove 35 is formed in the inner peripheral portion of the motor casing portion 15 where the stator 34 is located. Furthermore, the partition wall 17 is formed with an oil outflow portion 38A that communicates with the accommodation space of the screw rotors 11 and 12 through a minute space between the through holes 36 and 37 and the suction-side rotor shafts 11S and 12S and the partition wall 17. ing.
The cooling oil from the oil passage 9 passes through the branching portion 9c of the oil passage 9 in addition to the above-described portions of the suction-side rotor shafts 11S and 12S and the discharge-side rotor shafts 11D and 12D. , 12 are also supplied to the tooth gaps.

そして、上記構成からなる油冷式スクリュ圧縮機１Ａにおいて、モータ１４により駆動されるスクリュロータ１１，１２に吸込流路３からのガスが吸込口２１を経て吸込まれ、分岐部９ｃから油冷却器８により冷却された油の注入を受けつつ圧縮され、油を伴った圧縮ガスが吐出口２２から吐出流路５に介設された油分離回収器４へと吐出される。なお、分岐部９ｃから注入された油は、スクリュロータ１１，１２及びその収容空間の壁部の、それぞれの間におけるシール及び潤滑作用とともに、ガス圧縮の際の冷却作用も生じる。   In the oil-cooled screw compressor 1A having the above-described configuration, the gas from the suction passage 3 is sucked into the screw rotors 11 and 12 driven by the motor 14 through the suction port 21, and the oil cooler from the branch portion 9c. Compressed while receiving the injection of the oil cooled by 8, the compressed gas with the oil is discharged from the discharge port 22 to the oil separation / recovery unit 4 interposed in the discharge flow path 5. In addition, the oil injected from the branch part 9c also has a cooling action during gas compression as well as a sealing and lubricating action between the screw rotors 11 and 12 and the walls of the accommodation space.

油分離回収器４では、この内部に流入し、油分離エレメント６を通過する過程で、圧縮ガスと油との分離が行われ、分離された油は一旦油溜り部７に溜められ、油が取り除かれたクリーンな圧縮ガスは油分離回収器４の上方から延びる吐出流路５の部分に送り出される。また、油溜り部７の油は油流路９の油冷却器８により冷却された後、上述した分岐部９ａ、及び分岐部９ｃに導かれる。さらに、この冷却された油は、分岐部９ｂ、油流入部３３を経て、モーターケーシング部１５内に流入し、モータ１４内の冷却を必要とする部位、即ち回転子３１、固定子３４の該当する部位を浸漬させた状態を維持しつつ、油流出部３８Ａを経て、徐々にスクリュロータ１１，１２の収容空間に吸引されていくようになっている。
なお、上記各部に供給された油は、吐出口２２、油分離回収器４及び油流路９を経て繰返し循環させられる。 In the oil separation / recovery unit 4, the compressed gas and the oil are separated in the process of flowing into the interior and passing through the oil separation element 6, and the separated oil is once stored in the oil reservoir 7, The removed clean compressed gas is sent out to the portion of the discharge flow path 5 extending from above the oil separator / collector 4. Further, the oil in the oil reservoir 7 is cooled by the oil cooler 8 in the oil passage 9 and then guided to the branching portion 9a and the branching portion 9c described above. Further, the cooled oil flows into the motor casing portion 15 through the branch portion 9b and the oil inflow portion 33, and the portions that require cooling in the motor 14, that is, the rotor 31 and the stator 34 correspond to each other. While the part to be immersed is maintained, the oil is gradually sucked into the accommodation space of the screw rotors 11 and 12 through the oil outflow portion 38A.
In addition, the oil supplied to each part is repeatedly circulated through the discharge port 22, the oil separator / collector 4, and the oil passage 9.

このように、この油冷式スクリュ圧縮機１Ａでは、モータ１４の発熱部を間接的ではなく、直接、冷却した油に接触させ、そこでの発生熱を除去するようになっており、さらにガスではなく、この液状態の油をスクリュロータ１１，１２の収容空間に吸引、噴射させるようにしており、吸込みガス温度の過大な上昇を招くことなく、スクリュロータ１１，１２による吸込み効率を低下させることもない故、圧縮機本体２の性能低下も起らない。また、この油冷式スクリュ圧縮機１が冷凍機に用いられた場合、油流入部３３からの油に溶け込んだ冷媒がモーターケーシング部１５内を通過する際に生じる圧力損失により気化し、この気化熱によってもモーターケーシング部１５内での発生熱を除去することができる。
なお、モーターケーシング部１５には、上述したように螺旋溝３５が刻設されており、これにより冷却して油は固定子３４の外周部にも流れ、この外周部からも固定子３４での発生熱を除去することができ、より一層効率よくモータ１４の冷却が可能となっている。 Thus, in this oil-cooled screw compressor 1A, the heat generating part of the motor 14 is not indirect, but directly brought into contact with the cooled oil, and heat generated there is removed. The oil in the liquid state is sucked and injected into the housing space of the screw rotors 11 and 12, and the suction efficiency by the screw rotors 11 and 12 is reduced without causing an excessive increase in the suction gas temperature. Therefore, the performance of the compressor main body 2 does not deteriorate. Further, when the oil-cooled screw compressor 1 is used in a refrigerator, the refrigerant dissolved in the oil from the oil inflow portion 33 is vaporized due to the pressure loss generated when passing through the motor casing portion 15, and this vaporization is performed. Heat generated in the motor casing portion 15 can also be removed by heat.
As described above, the motor casing portion 15 is provided with the spiral groove 35, and by cooling, the oil flows also to the outer peripheral portion of the stator 34, and also from the outer peripheral portion at the stator 34. The generated heat can be removed, and the motor 14 can be cooled more efficiently.

図３は、本発明に係る別の油冷式スクリュ圧縮機１Ｂを示し、上述した油冷式スクリュ圧縮機１Ａと互いに共通する部分については、同一番号を付して説明を省略する。
この油冷式スクリュ圧縮機１Ｂでは、上述した油流出部３８Ａに代えて、モーターケーシング部１５内の油を逆止弁４１、絞り弁４２及び注油孔２７を経て吐出側のロータ軸１１Ｄ，１２Ｄに導く冷却油流路４３からなる油流出部３８Ｂが設けられている。この逆止弁４１は、冷却油のモーターケーシング部１５側への逆流を防止し、絞り弁４２は液状態の油が多量に流れるのを防止するためのものである。また、この油冷式スクリュ圧縮機１Ｂでは、上述した油流路９の分岐部９ａに代えて、吸込み側のロータ軸１１Ｓ，１２Ｓに冷却油を導く分岐部９ｄが設けられている。そして、この油は、上記同様にスクリュロータ１１，１２の収容空間に吸引、噴射される。 FIG. 3 shows another oil-cooled screw compressor 1B according to the present invention, and parts common to the oil-cooled screw compressor 1A described above are assigned the same reference numerals and description thereof is omitted.
In this oil-cooled screw compressor 1B, instead of the oil outflow portion 38A described above, the oil in the motor casing portion 15 passes through the check valve 41, the throttle valve 42, and the oil supply hole 27, and the rotor shafts 11D and 12D on the discharge side. The oil outflow part 38B which consists of the cooling oil flow path 43 led to is provided. This check valve 41 prevents the backflow of cooling oil to the motor casing portion 15 side, and the throttle valve 42 is for preventing a large amount of liquid oil from flowing. Further, in the oil-cooled screw compressor 1B, instead of the branch portion 9a of the oil flow path 9 described above, a branch portion 9d that guides the cooling oil to the suction-side rotor shafts 11S and 12S is provided. Then, this oil is sucked and injected into the accommodation space of the screw rotors 11 and 12 as described above.

図４は、本発明に係るさらに別の油冷式スクリュ圧縮機１Ｃを示し、上述した油冷式スクリュ圧縮機１Ｂと互いに共通する部分については、同一番号を付して説明を省略する。
この油冷式スクリュ圧縮機１Ｃでは、上述した油流出部３８Ｂに代えて、モーターケーシング部１５内の油を逆止弁４１、絞り弁４２を経てスクリュロータ１１，１２の歯溝部に導く冷却油流路４４からなる油流出部３８Ｃが設けられている。また、この油冷式スクリュ圧縮機１Ｃでは、上述した油流路９の分岐部９ｃに代えて、分岐部９ａが設けられている。そして、分岐部９ｃと同様、冷却油流路４４からの油により、上述したシール、潤滑及び冷却作用が生じるようになっている。 FIG. 4 shows still another oil-cooled screw compressor 1C according to the present invention, and parts common to the oil-cooled screw compressor 1B described above are assigned the same reference numerals and description thereof is omitted.
In this oil-cooled screw compressor 1C, instead of the oil outflow portion 38B described above, the cooling oil that guides the oil in the motor casing portion 15 to the tooth groove portions of the screw rotors 11 and 12 through the check valve 41 and the throttle valve 42. An oil outflow portion 38 </ b> C composed of the flow path 44 is provided. Further, in the oil-cooled screw compressor 1C, a branch portion 9a is provided instead of the branch portion 9c of the oil passage 9 described above. And like the branch part 9c, the seal | sticker, lubrication, and cooling effect | action mentioned above arise with the oil from the cooling oil flow path 44. FIG.

図５は、本発明に係るさらに別の油冷式スクリュ圧縮機１Ｄを示し、上述した油冷式スクリュ圧縮機１Ｃと互いに共通する部分については、同一番号を付して説明を省略する。
この油冷式スクリュ圧縮機１Ｄでは、上述した油流出部３８Ｃに代えて、モーターケーシング部１５内の油を逆止弁４１、絞り弁４２を経て吸込み側のロータ軸１１Ｓ，１２Ｓ、吐出側のロータ軸１１Ｄ，１２Ｄ及びスクリュロータ１１，１２の歯溝部のそれぞれに導く冷却油流路４５からなる油流出部３８Ｄが設けられている。また、この油冷式スクリュ圧縮機１Ｄでは、この冷却油流路４５を設けたことにより、上述した油流路９の分岐部９ａ及び９ｃは省かれている。 FIG. 5 shows still another oil-cooled screw compressor 1D according to the present invention, and portions common to the oil-cooled screw compressor 1C described above are denoted by the same reference numerals and description thereof is omitted.
In this oil-cooled screw compressor 1D, instead of the oil outflow portion 38C described above, the oil in the motor casing portion 15 passes through the check valve 41 and the throttle valve 42, and the suction-side rotor shafts 11S and 12S and the discharge-side screw shaft 1S. An oil outflow portion 38D including a cooling oil passage 45 led to the rotor shafts 11D and 12D and the tooth groove portions of the screw rotors 11 and 12 is provided. In the oil-cooled screw compressor 1D, the cooling oil passage 45 is provided, so that the branch portions 9a and 9c of the oil passage 9 described above are omitted.

なお、上述した逆止弁４１及び絞り弁４２は必ずしも必要とするものでない。
また、上述した油流出部３８Ａ，３８Ｂ，３８Ｃ及び３８Ｄは適宜併用してもよい。 The check valve 41 and the throttle valve 42 described above are not necessarily required.
Moreover, you may use together the oil outflow part 38A, 38B, 38C, and 38D mentioned above suitably.

本発明は、例えば冷凍機、ヒートポンプに適用できる。   The present invention can be applied to, for example, a refrigerator and a heat pump.

本発明に係る油冷式スクリュ圧縮機の全体構成の概略を示す図である。It is a figure which shows the outline of the whole structure of the oil-cooled screw compressor which concerns on this invention. 図１に示す油冷式スクリュ圧縮機における圧縮機本体の断面図である。It is sectional drawing of the compressor main body in the oil-cooled screw compressor shown in FIG. 本発明に係る別の油冷式スクリュ圧縮機の全体構成の概略を示す図である。It is a figure which shows the outline of the whole structure of another oil-cooled screw compressor which concerns on this invention. 本発明に係る別の油冷式スクリュ圧縮機の全体構成の概略を示す図である。It is a figure which shows the outline of the whole structure of another oil-cooled screw compressor which concerns on this invention. 本発明に係る別の油冷式スクリュ圧縮機の全体構成の概略を示す図である。It is a figure which shows the outline of the whole structure of another oil-cooled screw compressor which concerns on this invention.

符号の説明Explanation of symbols

１Ａ，１Ｂ，１Ｃ，１Ｄ 油冷式スクリュ圧縮機
２ 圧縮機本体
３ 吸込流路
４ 油分離回収器
５ 吐出流路
６ 油分離エレメント
７ 油溜り部
８ 油冷却器
９ 油流路
９ａ，９ｂ，９ｃ，９ｄ 分岐部
１１，１２ スクリュロータ
１１Ｄ，１２Ｄ ロータ軸
１１Ｓ，１２Ｓ ロータ軸
１３ 本体ケーシング部
１４ モータ
１５ モーターケーシング部
１６ 半密閉ケーシング
１７ 隔壁
２１ 吸込口
２２ 吐出口
２３，２４ 軸受
２５，２６ 軸受
２７ 注油孔
３１ 回転子
３２ 出力軸
３３ 油流入部
３４ 固定子
３５ 螺旋溝
３６，３７ 貫通孔
３８Ａ，３８Ｂ，３８Ｃ，３８Ｄ 油流出部
1A, 1B, 1C, 1D Oil-cooled screw compressor 2 Compressor body 3 Suction passage 4 Oil separation / recovery device 5 Discharge passage 6 Oil separation element 7 Oil reservoir 8 Oil cooler 9 Oil passages 9a, 9b, 9c, 9d Branching portion 11, 12 Screw rotor 11D, 12D Rotor shaft 11S, 12S Rotor shaft 13 Main body casing portion 14 Motor 15 Motor casing portion 16 Semi-sealed casing 17 Bulkhead 21 Suction port 22 Discharge port 23, 24 Bearing 25, 26 Bearing 27 Oil supply hole 31 Rotor 32 Output shaft 33 Oil inflow portion 34 Stator 35 Spiral grooves 36, 37 Through holes 38A, 38B, 38C, 38D Oil outflow portion

Claims (4)

互いに噛合う雌雄一対のスクリュロータを収容した本体ケーシング部と上記スクリュロータを駆動するモータのモーターケーシング部とが一体的かつ気密に形成され、上記本体ケーシング部内の空間と上記モーターケーシング部内の空間とが隔壁により仕切られた半密閉ケーシングを採用した圧縮機本体を備えた油冷式スクリュ圧縮機において、上記モーターケーシング部に外部から冷却油を流入させる油流入部と、上記モータ内の冷却を必要とする部位が上記冷却油に浸漬した状態を維持しつつ、上記モーターケーシング部内の冷却油を上記圧縮機本体内に導く油流出部とを設けたことを特徴とする油冷式スクリュ圧縮機。   A main body casing portion that houses a pair of male and female screw rotors that mesh with each other and a motor casing portion of a motor that drives the screw rotor are integrally and airtightly formed, and a space in the main body casing portion and a space in the motor casing portion In an oil-cooled screw compressor equipped with a compressor body that employs a semi-hermetic casing that is partitioned by a partition wall, an oil inflow portion that allows cooling oil to flow into the motor casing portion from the outside, and cooling of the motor is required An oil-cooled screw compressor comprising an oil outflow portion that guides the cooling oil in the motor casing portion into the compressor body while maintaining a state where the portion to be immersed in the cooling oil is maintained. 上記油流出部が、上記隔壁に形成された貫通孔の上記モータ側開口端を入口とし、上記スクリュロータの吸込み側のロータ軸と上記隔壁との間の微小空間を経て、上記スクリュロータの収容空間に通じることを特徴とする請求項１に記載の油冷式スクリュ圧縮機。   The oil outflow portion is stored in the screw rotor through a minute space between the rotor shaft on the suction side of the screw rotor and the partition wall, with the motor side opening end of the through hole formed in the partition wall as an inlet. The oil-cooled screw compressor according to claim 1, wherein the oil-cooled screw compressor is in communication with a space. 上記油流出部が、上記隔壁を経由することなく、上記圧縮機本体内に至る冷却油流路を含むことを特徴とする請求項１または２に記載の油冷式スクリュ圧縮機。   3. The oil-cooled screw compressor according to claim 1, wherein the oil outflow portion includes a cooling oil passage that reaches the inside of the compressor body without passing through the partition wall. 4. 上記油流入部が、上記圧縮機本体の吐出側に設けられる油分離回収器の下部から油冷却器を介して延びる油流路に接続されたことを特徴とする請求項１から３のいずれか１項に記載の油冷式スクリュ圧縮機。
The said oil inflow part is connected to the oil flow path extended through the oil cooler from the lower part of the oil separation collection | recovery device provided in the discharge side of the said compressor main body. The oil-cooled screw compressor according to item 1.
JP2003297709A 2003-08-21 2003-08-21 Oil injection type screw compressor Pending JP2005069062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003297709A JP2005069062A (en) 2003-08-21 2003-08-21 Oil injection type screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003297709A JP2005069062A (en) 2003-08-21 2003-08-21 Oil injection type screw compressor

Publications (1)

Publication Number Publication Date
JP2005069062A true JP2005069062A (en) 2005-03-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003297709A Pending JP2005069062A (en) 2003-08-21 2003-08-21 Oil injection type screw compressor

Country Status (1)

Country Link
JP (1) JP2005069062A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329157A (en) * 2005-05-30 2006-12-07 Kobe Steel Ltd Oil injection type compressor
JP2010038509A (en) * 2008-08-08 2010-02-18 Kobe Steel Ltd Refrigerating device
JP2016200058A (en) * 2015-04-10 2016-12-01 株式会社日立産機システム Oil supply type displacement compressor
WO2022149482A1 (en) * 2021-01-08 2022-07-14 コベルコ・コンプレッサ株式会社 Oil-cooled compressor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329157A (en) * 2005-05-30 2006-12-07 Kobe Steel Ltd Oil injection type compressor
JP4634862B2 (en) * 2005-05-30 2011-02-16 株式会社神戸製鋼所 Oil-cooled compressor
JP2010038509A (en) * 2008-08-08 2010-02-18 Kobe Steel Ltd Refrigerating device
JP2016200058A (en) * 2015-04-10 2016-12-01 株式会社日立産機システム Oil supply type displacement compressor
WO2022149482A1 (en) * 2021-01-08 2022-07-14 コベルコ・コンプレッサ株式会社 Oil-cooled compressor
TWI800205B (en) * 2021-01-08 2023-04-21 日商神鋼壓縮機股份有限公司 Oil Cooled Compressor

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