JP3349872B2 - Oil-cooled screw two-stage compressor - Google Patents
Oil-cooled screw two-stage compressorInfo
- Publication number
- JP3349872B2 JP3349872B2 JP22460295A JP22460295A JP3349872B2 JP 3349872 B2 JP3349872 B2 JP 3349872B2 JP 22460295 A JP22460295 A JP 22460295A JP 22460295 A JP22460295 A JP 22460295A JP 3349872 B2 JP3349872 B2 JP 3349872B2
- Authority
- JP
- Japan
- Prior art keywords
- gear case
- compressor
- stage compressor
- pressure
- low
- 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 - Lifetime
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Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、油冷式スクリュ
二段圧縮機に関する。TECHNICAL FIELD The present invention relates to an oil-cooled screw two-stage compressor.
【０００２】[0002]
【従来の技術】 従来公知の、ギヤケースの一側面の上
下方向に低圧段圧縮機と、前記低圧段圧縮機回転軸と
略、並行な回転軸を備えた高圧段圧縮機を配置し、共通
する増速ギヤ手段により、それぞれを駆動する形式の油
冷式スクリュ二段圧縮機は、低圧段圧縮機の吐出口と高
圧段圧縮機の吸入口とを端板（インレットケース）内に
設けたチャンネルを介して相互に連通し、かつ、低圧段
圧縮機から吐出する圧縮流体が前記ギヤケース内を流通
するように構成している（例えば、昭和４８年特許出願
公開第２１８０６号公報、昭和５２年実用新案出願公告
第８０８２号公報、昭和５２実用新案出願公告第３３６
１０号公報、昭和５４年特許出願公告第２８６０３号公
報等参照）。2. Description of the Related Art A conventionally known low-pressure stage compressor and a high-pressure stage compressor having a rotating shaft substantially parallel to the rotating shaft of the low-pressure stage compressor are arranged in the vertical direction on one side surface of a gear case, and are commonly used. An oil-cooled screw two-stage compressor of the type driven by the speed-up gear means has a channel provided with an outlet of a low-pressure stage compressor and a suction port of a high-pressure stage compressor in an end plate (inlet case). And the compressed fluid discharged from the low-pressure stage compressor flows through the gear case (for example, Japanese Patent Application Laid-Open No. 21806/1976; Japanese Utility Model Application Publication No. 8082, Showa 52 Utility Model Application Publication No. 336
No. 10, Japanese Patent Application Publication No. 28603, 1979).
【０００３】 また、ギヤケースに内装した増速ギヤ
（ドライブ及びドリブンギヤ）手段に向かって、レシー
バタンクから圧送される潤滑油が噴射ノズルを介して噴
射・供給され、ギヤケースの下底部に溜った潤滑油は、
低圧段圧縮機から吐出される圧縮空気とオイルミストと
共に高圧段圧縮機の吸入口から吸い込み・回収されるよ
う構成されている。この種形式の油冷式スクリュ二段圧
縮機は、それ以前の形式、たとえば、くし形配置のスク
リュ二段圧縮機と比較して、部品点数を減らして装置を
小型化するとか、騒音の低下、組立・調整を容易にする
などの特徴を備えている。Further, lubricating oil pressure-fed from a receiver tank is injected and supplied via an injection nozzle toward a speed increasing gear (drive and driven gear) means provided in a gear case, and lubricating oil collected at a lower bottom portion of the gear case. Is
The compressed air and the oil mist discharged from the low-pressure stage compressor are sucked and collected from the suction port of the high-pressure stage compressor. This type of oil-cooled screw two-stage compressor can reduce the number of parts, reduce the size of the device, and reduce noise compared to the earlier type, for example, a screw-type screw compressor with a comb arrangement. And features such as easy assembly and adjustment.
【０００４】 しかしながら、前述の並列配置形油冷式
スクリュ二段圧縮機には、 （ａ）インレットケースとギヤケースとを兼用させ、部
品点数を減らし、加工または組立工数の低減や圧縮機本
体の小型化を図る。 （ｂ）ギヤケースの下底部に溜る潤滑油を高圧段圧縮機
により回収するようにし、増速ギヤ手段が潤滑油面を撹
拌しないようにすれば、エネルギーロスが減少し、ま
た、潤滑油回収管を不要にできれば、ギヤケースの形状
をよりコンパクトにまとめることが可能。However, the above-described oil-cooled screw two-stage compressor of the parallel arrangement type has the following features: (a) The inlet case and the gear case are combined, the number of parts is reduced, the number of machining or assembly steps is reduced, and the size of the compressor body is reduced. Plan. (B) If the lubricating oil collected at the lower bottom of the gear case is collected by the high-pressure compressor and the speed-up gear means is not agitated on the lubricating oil surface, the energy loss is reduced and the lubricating oil collecting pipe is reduced. If it is not necessary, the shape of the gear case can be made more compact.
【０００５】 （ｃ）高圧段圧縮機の吐出側軸受室の圧
力を低下させて、回転軸にかかる吸入側へのスラスト荷
重を低下させ、もって、小型軸受の使用を可能にする。 （ｄ）低圧段圧縮機の吐出側軸受室を中間段通路に接続
することにより、全負荷時における低圧段圧縮機の回転
軸の逆スラスト荷重の発生を抑える。等々の構成を開発
することにより、圧縮機全体の構造をコンパクトにまと
め、コストダウンを可能にする余地がある。[0005] (c) by reducing the pressure on the discharge side shaft receiving chamber of the high-pressure compressor, to reduce the thrust load on the suction side according to the rotation axis, it has to allow the use of small bearings. By connecting the discharge side shaft receiving chamber of the (d) low-pressure compressor to the intermediate stage passage, suppress the occurrence of reverse thrust load of the rotation shaft of the low-pressure compressor at full load. By developing various configurations, there is room for reducing the cost by making the overall structure of the compressor compact.
【０００６】[0006]
【発明が解決しようとする課題】そこで本発明は、油冷
式スクリュ二段圧縮機について指摘した上記の問題点を
すべて解消し、コンパクトで経済的な、新規構造の油冷
式スクリュ二段圧縮機を開発・提供することを目的とす
る。SUMMARY OF THE INVENTION Accordingly, the present invention solves all the above-mentioned problems pointed out with respect to an oil-cooled screw two-stage compressor, and is compact and economical, and has a new structure of an oil-cooled screw two-stage compressor. The purpose is to develop and provide machines.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するために、以下に述べるとおりの各構成要件を具備
する。 （１） シリンダ内に、おす・めすスクリュロータを収
納・噛み合わせ、各スクリュロータの回転軸の両側を軸
受で軸支して形成した低圧段及び高圧段圧縮機を、ギヤ
ケースの一側面の略、上下方向に、各圧縮機の回転軸が
平行になるように並列・配置し、前記ギヤケースに内装
した増速ギヤ手段により、各圧縮機を駆動し、前記低圧
段圧縮機の吐出口及び高圧段圧縮機の吸入口を前記ギヤ
ケース内空間に連通してなる油冷式スクリュ二段圧縮機
において、前記低圧段圧縮機のシリンダ内と、ギヤケー
ス内空間及び前記シリンダを挟んでギヤケースと反対側
に配置する軸受室との間の各一対の軸部に、それぞれ軸
封装置を設け、前記シリンダを挟んでギヤケースと反対
側に配置する軸受室の少なくとも一方と、前記ギヤケー
ス内空間との間を連通したことを特徴とする油冷式スク
リュ二段圧縮機。The present invention has the following constituent elements in order to achieve the above object. (1) into the cylinder, male-female housing, engaging the screw rotors, a low-pressure stage and high pressure stage compressor formed by rotatably supporting a bearing on both sides of the rotational axis of each screw rotors, substantially aspect of the gear case In the vertical direction, the rotation axis of each compressor is
Parallel-arranged in parallel, said by speed increasing gear means and furnished to the gear case, to drive each compressor, the said low-pressure-stage compressor discharge and suction port of the high-pressure compressor gear <br / > in oil-cooled type screw two-stage compressor comprising communicating with the casing space, and the cylinder of the low-pressure compressor, Giyake
Side of the gear case with the internal space and the cylinder
A shaft sealing device is provided on each of a pair of shaft portions between the bearing chamber and the bearing chamber, and at least one of the bearing chambers disposed on the opposite side to the gear case with the cylinder interposed therebetween, and the space between the gear case inner space. An oil-cooled screw two-stage compressor characterized by communication.
【０００８】（２） シリンダ内に、おす・めすスクリ
ュロータを収納・噛み合わせ、各スクリュロータの回転
軸を両側を軸受で軸支して形成した低圧段及び高圧段圧
縮機を、ギヤケースの一側面の略、上下方向に、各圧縮
機の回転軸が平行になるように並列・配置し、前記ギヤ
ケースに内装した増速ギヤ手段により、各圧縮機を駆動
し、前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入
口を前記ギヤケース内空間に連通してなる油冷式スクリ
ュ二段圧縮機において、前記低圧段圧縮機のおす・めす
スクリュロータのいずれか一方のギヤケース側回転軸端
に被駆動ギヤを固定し、前記一方のスクリュロータの、
ギヤケース側及び前記シリンダを挟んでギヤケースと反
対側の軸部に、それぞれ軸封装置を設けると共に、前記
シリンダを挟んでギヤケースと反対側に配置する軸受室
と、前記ギヤケース内空間とを連通し、他方のスクリュ
ロータのギヤケース側に配置する軸受室を前記ギヤケー
ス内空間に対し隔壁によって遮断する一方、スクリュロ
ータの前記シリンダを挟んでギヤケースと反対側の軸部
に軸封装置を設けると共に、前記シリンダを挟んでギヤ
ケースと反対側に配置する軸受室と、前記低圧段圧縮機
における吸入閉じ込み後１ピッチの作用空間とを連通し
たことを特徴とする油冷式スクリュ二段圧縮機。[0008] (2) into the cylinder, male and female screw rotors accommodated, engaging, and the low-pressure stage and high pressure stage compressor is formed by rotatably supporting a rotary shaft on both sides with a bearing of the screw rotors, one gear case Side compression , vertical compression , each compression
The compressors are driven in parallel by arranging the rotation axes of the compressors in parallel with each other, and each compressor is driven by the speed increasing gear means housed in the gear case, and the discharge port of the low- pressure compressor and the suction of the high-pressure compressor are driven.
In oil-cooled type screw two-stage compressor mouth made to communicate with the gear case space, a driven gear fixed to one of the gear case side rotation shaft end of the low-pressure compressor of male and female screw rotors, of the one screw rotor,
A shaft sealing device is provided on the shaft portion on the gear case side and on the side opposite to the gear case with the cylinder interposed therebetween, and a bearing chamber disposed on the opposite side to the gear case with the cylinder interposed therebetween communicates with the space inside the gear case, A bearing chamber arranged on the gear case side of the other screw rotor is blocked by a partition wall from the space inside the gear case, and a shaft sealing device is provided on a shaft portion of the screw rotor opposite to the gear case with the cylinder interposed therebetween. a bearing chamber arranged on the opposite side of the gear case across the oil-cooled type screw two-stage compressor, characterized in that communication between the work space of one pitch after inclusive suction shut in the low-pressure stage compressor.
【０００９】（３） シリンダ内に、おす・めすスクリ
ュロータを収納・噛み合わせ、各スクリュロータの回転
軸を両側を軸受で軸支して形成した低圧段及び高圧段圧
縮機を、ギヤケースの一側面の略、上下方向に、各圧縮
機の回転軸が平行になるように並列・配置し、前記ギヤ
ケースに内装した増速ギヤ手段により、各圧縮機を駆動
し、前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入
口を前記ギヤケース内空間に連通してなる油冷式スクリ
ュ二段圧縮機において、前記高圧段圧縮機のおす・めす
スクリュロータのいずれか一方のギヤケース側回転軸端
に被駆動ギヤを固定し、前記被駆動ギヤの外径を、前記
一方のスクリュロータの外径よりも小径にして、被駆動
ギヤの外径下側よりも高圧段圧縮機の吸入口下側を低く
したことを特徴とする油冷式スクリュ二段圧縮機。[0009] (3) into the cylinder, male and female screw rotors accommodated, engaging, and the low-pressure stage and high pressure stage compressor is formed by rotatably supporting a rotary shaft on both sides with a bearing of the screw rotors, one gear case Side compression , vertical compression , each compression
The compressors are driven in parallel by arranging the rotation axes of the compressors in parallel with each other, and each compressor is driven by the speed increasing gear means housed in the gear case, and the discharge port of the low- pressure compressor and the suction of the high-pressure compressor are driven.
In oil-cooled type screw two-stage compressor mouth made to communicate with the gear case space, the driven gear on one of the gear case side rotation shaft end of the male of the high-pressure compressor and female <br/> screw rotors And the outer diameter of the driven gear is
Than the outer diameter of one of the screw rotors in the small diameter, the driven
An oil-cooled screw two-stage compressor characterized in that the lower side of the suction port of the high-pressure stage compressor is lower than the lower side of the outer diameter of the gear .
【００１０】（４） シリンダ内に、おす・めすスクリ
ュロータを収納・噛み合わせ、各スクリュロータの回転
軸を両側を軸受で軸支して形成した低圧段及び高圧段圧
縮機を、ギヤケースの一側面の略、上下方向に、各圧縮
機の回転軸が平行になるように並列・配置し、前記ギヤ
ケースに内装した増速ギヤ手段により、各圧縮機を駆動
し、前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入
口を前記ギヤケース内空間に連通してなる油冷式スクリ
ュ二段圧縮機において、前記高圧段圧縮機のスクリュロ
ータの吐出口側に配置する軸受室と、前記低圧段圧縮機
の吸入閉じ込み後１ピッチの作用空間とを連通したこと
を特徴とする油冷式スクリュ二段圧縮機。[0010] (4) into the cylinder, male and female screw rotors accommodated, engaging, and the low-pressure stage and high pressure stage compressor is formed by rotatably supporting a rotary shaft on both sides with a bearing of the screw rotors, one gear case Side compression , vertical compression , each compression
The compressors are driven in parallel by arranging the rotation axes of the compressors in parallel with each other, and each compressor is driven by the speed increasing gear means housed in the gear case, and the discharge port of the low- pressure compressor and the suction of the high-pressure compressor are driven.
In oil-cooled type screw two-stage compressor mouth made to communicate with the gear case space, and the bearing chamber arranged on the discharge port side of the screw rotor of the high pressure stage compressor, after narrowing intake closing of the low-pressure compressor 1 oil-cooled type screw two-stage compressor, characterized in that communication between the work space of the pitch.
【００１１】（５） シリンダ内に、おす・めすスクリ
ュロータを収納・噛み合わせ、各スクリュロータの回転
軸を両側を軸受で軸支して形成した低圧段及び高圧段圧
縮機を、ギヤケースの一側面の略、上下方向に、各圧縮
機の回転軸が平行になるように並列・配置し、前記ギヤ
ケースに内装した増速ギヤ手段により、各圧縮機を駆動
し、前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入
口を前記ギヤケース内空間に連通してなる油冷式スクリ
ュ二段圧縮機において、前記ギヤケース内空間とレリー
フバルブの吸気側とを連通すると共に、前記レリーフバ
ルブの排気側を高圧段圧縮機の吐出口からレシーバタン
クまでの間に連通したことを特徴とする油冷式スクリュ
二段圧縮機。(5) A low-pressure stage and a high-pressure stage compressor in which a male / female screw rotor is housed and engaged in a cylinder, and a rotary shaft of each screw rotor is supported on both sides by bearings, Side compression , vertical compression , each compression
The compressors are driven in parallel by arranging the rotation axes of the compressors in parallel with each other, and each compressor is driven by the speed increasing gear means housed in the gear case, and the discharge port of the low- pressure compressor and the suction of the high-pressure compressor are driven.
In oil-cooled type screw two-stage compressor mouth made to communicate with the gear case space communicated with an intake side of the gear case in the space and the relief valve, the exhaust side of the relief valve of the high-pressure compressor discharge failure An oil-cooled screw two-stage compressor characterized by communication between the outlet and the receiver tank.
【００１２】（６） 前記低圧段圧縮機の吐出口を、シ
リンダを挟んでギヤケースと反対側に設け、これを中間
段通路を介して前記ギヤケース内空間と連通し、増速ギ
ヤ手段を構成する各歯車をそれぞれ、はすば歯車とした
ことを特徴とする請求項１または２記載の油冷式スクリ
ュ二段圧縮機。 （７） 前記高圧段圧縮機のシリンダを挟んでギヤケー
スと反対側に配置するおす・めすスクリュロータの各軸
受室の下部を、それぞれ通路を介して連通し、前記各軸
受室の内の、いずれか一方の軸受室の下部と、低圧段圧
縮機の吸入閉じ込み後１ピッチの作用空間とを連通した
ことを特徴とする請求項４記載の油冷式スクリュ二段圧
縮機。 （８） 前記低圧段圧縮機のシリンダを挟んでギヤケー
スと反対側に配置するおす・めすスクリュロータの各軸
受室の下方に中間段通路と連通する開口を設けたことを
特徴とする請求項６記載の油冷式スクリュ二段圧縮機。[0012] (6) discharge port of the low-pressure compressor, is provided on the opposite side of the gear case across the cylinder, which communicates with the gear case space via the intermediate stage passage, constituting a speed increasing gear means The two-stage oil-cooled screw compressor according to claim 1 or 2, wherein each gear is a helical gear. (7) the lower portion of each bearing chamber of the high-pressure compressor of the male and female screw rotors arranged on the opposite side of the gear case across the cylinder, communicates via the respective passage, each shaft <br/> receiving chamber of the, one of the lower bearing chamber, the oil-cooled type screw two-stage according to claim 4, wherein the communicating with the working space of one pitch after inclusive closed inhalation of the low-pressure compressor compressing Machine. (8) said an opening communicating with the intermediate stage passage below the axes <br/> receiving chamber of the low-pressure compressor of the male and female screw rotors arranged on the opposite side of the gear case across the cylinder
The two-stage oil-cooled screw compressor according to claim 6, characterized in that:
【００１３】[0013]
【発明の実施の形態】以下に、本発明油冷式スクリュ二
段圧縮機の一実施形態について、図面に沿って説明する
が、本実施形態を構成する各要件のうちには、本出願当
時の当業界における通常の技術レベルの範囲内で、当業
者により各種の変形が可能なものを含むから、格別の理
由を示すことなく、本実施形態が開示する特定構成のみ
に基づいて、本発明の要旨を限定して解することは許さ
れない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the oil-cooled screw two-stage compressor of the present invention will be described below with reference to the drawings. Since various modifications can be made by those skilled in the art within the range of ordinary technical levels in the art, the present invention will be described based on only the specific configuration disclosed in the present embodiment without special reason. It is not permissible to limit the gist of this.
【００１４】 図は、本発明油冷式スクリュ二段圧縮機
の一実施形態を示すもので、図１は、当該スクリュ二段
圧縮機の概略側断面で、図２におけるＡ−Ａ線に沿う断
面図、図２は、図１においてＢ−Ｂ線矢視の一部を切り
欠いて示す正面図、図３は、図１におけるＣ−Ｃ線断面
矢視図で、図４及び５は、それぞれ図２におけるＤ−Ｄ
線、Ｅ−Ｅ線に沿う断面図を示す。FIG. 1 shows an embodiment of the oil-cooled screw two-stage compressor of the present invention. FIG. 1 is a schematic side sectional view of the screw two-stage compressor, taken along line AA in FIG. FIG. 2 is a front view showing a cross-sectional view taken along a line BB in FIG. 1, and FIG. 3 is a cross-sectional view taken along a line CC in FIG. 1, and FIGS. DD in FIG. 2 respectively
FIG. 2 shows a cross-sectional view along the line EE.
【００１５】 図中、一つのギヤケース１の側面上方側
に低圧段圧縮機のシリンダ２を、同側面の下側方に高圧
段圧縮機のシリンダ３を、シリンダ軸心が相互に並列す
るように取付けると共に、各シリンダ２，３内に、それ
ぞれ一対の低圧段及び高圧段圧縮機の、おす・めすスク
リュロータ（以下、ロータという）４，４’及び５，
５’を内装・並設して、各ロータの回転軸４１，４１’
と５１，５１’を各端板部材６，７と前記ギヤケース１
側に設けた軸受４２，４２，４３，４３’及び５２，５
２’，５３，５３’によって、それぞれ軸支して、各一
対のロータ４，４’及び５，５’を各々独立に軸支し、
各一対のロータ４，４’及び５，５’に形成したスクリ
ュ歯形を互いに噛み合わせると共に、いずれか一方側の
ロータ４，５の回転軸４１，５１のギヤケース１側に延
長した端部に、それぞれ被駆動ギヤ４４，５４を取付
け、それらをギヤケース１に配設した軸受６２，６３に
軸支される大径駆動ギヤ８に噛み合わせ、それぞれ増速
ギヤ手段を構成する。In FIG. 1, a cylinder 2 of a low-pressure stage compressor is provided above a side surface of one gear case 1, a cylinder 3 of a high-pressure stage compressor is provided below the same side surface, and cylinder axes are arranged in parallel with each other. At the same time, male and female screw rotors (hereinafter referred to as rotors) 4, 4 'and 5, of a pair of low-pressure stage and high-pressure stage compressors are respectively installed in the cylinders 2 and 3.
5 ′ are installed inside and side by side, and the rotating shafts 41 and 41 ′ of each rotor are arranged.
, 51, 51 ′ with the end plate members 6, 7 and the gear case 1.
Bearings 42, 42, 43, 43 'and 52, 5
2 ′, 53, 53 ′, respectively, and each pair of rotors 4, 4 ′ and 5, 5 ′ are independently supported,
Screw teeth formed on each of the pair of rotors 4, 4 'and 5, 5' mesh with each other, and at the ends of the rotating shafts 41, 51 of one of the rotors 4, 5 extending toward the gear case 1 side, Driven gears 44 and 54 are mounted, respectively, and mesh with the large-diameter drive gear 8 which is supported by bearings 62 and 63 provided in the gear case 1 to constitute speed-up gear means.
【００１６】 各一対のロータ間の回転伝導は、噛み合
わせたスクリュ歯形面相互の滑動により行なわれる。ロ
ータのスクリュ歯形の噛み合わせ面とシリンダ内壁、端
板により区画される作用空間はロータの回転に従って、
その容積を狭め、作用空間に吸入された空気を（ほぼ、
断熱）圧縮し終端において圧縮した空気を吐出する。各
端板部材６，７と前記ギヤケース１側に設けた軸受４
２，４２’，４３及び５２，５２’と、一対のロータ
４，４’及び５，５’の端面との間の軸部には、軸封装
置４７，４７’，４８及び５７，５７’が設けられ、軸
受４２，４２’及び５２，５２’を収容する軸受室６
１，６１’及び７１，７１’とシリンダ２及び３内との
間、ギヤケース１内空間とシリンダ２及び３内との間の
空気、オイルの流通が遮断されている。なお、前記軸封
装置には、それぞれ高圧潤滑油を供給し、性能・寿命の
向上を図る。図中、圧縮機の内部空間に示された矢印を
有する曲線は、装置内を流通する空気、オイルミスト及
びオイルの流れ方向を示している。[0016] The rotational transmission between each pair of rotors is performed by sliding between the meshed screw tooth surfaces. The working space defined by the meshing surface of the screw tooth profile of the rotor, the inner wall of the cylinder, and the end plate follows the rotation of the rotor.
By reducing its volume, the air sucked into the working space (almost
Adiabatic) Compress and discharge compressed air at the end. Each end plate member 6, 7 and the bearing 4 provided on the gear case 1 side
Shafts 47, 47 ', 48 and 57, 57' are provided on shafts between the shafts 2 , 42 ', 43 and 52, 52' and end faces of the pair of rotors 4, 4 ', 5, 5'. Provided in the bearing chamber 6 for accommodating the bearings 42, 42 'and 52, 52'.
The flow of air and oil between the space between the gears 1, 61 'and 71, 71' and the cylinders 2 and 3 and the space between the gear case 1 and the cylinders 2 and 3 is shut off. In addition, high-pressure lubricating oil is supplied to each of the shaft sealing devices to improve performance and life. In the drawing, a curve having an arrow shown in the internal space of the compressor indicates a flow direction of air, oil mist, and oil flowing in the device.
【００１７】 図３を参照して、増速ギヤ手段を構成す
る上述の大径駆動ギヤ８及び被駆動ギヤ４４，５４は、
それぞれ、はすば歯車よりなり、前記大径駆動ギヤ８と
被駆動ギヤ４４，５４の歯の捻じれ方向とその回転方向
を、各回転軸に対し圧縮機の圧縮作用により発生するス
ラスト力と反対方向の逆スラスト力が作用するように選
定している。また、少なくとも、高圧段圧縮機の被駆動
ギヤ54の外径Ｄ2 は、同圧縮機のロータの径Ｄ1 より
も、小さく構成されている（図５参照）。そして、被駆
動ギヤ５４の外周下側の方が、大径駆動ギヤ８の外周下
側よりも低い位置を占めるようにギヤケース１に組み付
けてある（図３参照）。Referring to FIG. 3, the above-described large-diameter drive gear 8 and driven gears 44 and 54 constituting the speed increasing gear means are
Each is composed of a helical gear, and the torsional direction and the rotational direction of the teeth of the large-diameter drive gear 8 and the driven gears 44 and 54 are determined by the thrust force generated by the compression action of the compressor on each rotating shaft. The reverse thrust force in the opposite direction is selected. Further, at least the outer diameter D 2 of the driven gear 54 of the high pressure stage compressor, than the diameter D 1 of the rotor of the compressor, and a small (see FIG. 5). The lower peripheral portion of the driven gear 54 is mounted on the gear case 1 so as to occupy a lower position than the lower peripheral portion of the large-diameter drive gear 8 (see FIG. 3).
【００１８】 上記ギヤケース１の上部に開口する給油
孔１１，１２からギヤケース１内にオイルクーラを通っ
た高圧潤滑油を供給・噴射し、前記潤滑油は、それぞれ
ギヤケースに内装した増速ギヤ手段、軸受４３，５３，
５３’，６２，６３などの潤滑・冷却を行う。なお、矢
印で「ＯＩＬ」と記載した個所は、潤滑油の供給孔を示
している。上記潤滑油の一部は、それぞれ所要の作用を
果たした後、ギヤケース１内の底部に重力により落下
し、そこで滞留する。High-pressure lubricating oil that has passed through an oil cooler is supplied and injected into the gear case 1 from oil supply holes 11 and 12 that open in the upper part of the gear case 1. Bearings 43, 53,
Lubrication and cooling of 53 ', 62, 63, etc. are performed. Incidentally, points which were described as "OIL" with an arrow indicates the supply hole Jun Namerayu. Some of the lubricating oil, after each play the required action, fall by gravity to the bottom of the gear case 1, where staying.
【００１９】〔低圧段圧縮機〕 図１，４を参照して、低圧段圧縮機は、そのシリンダ２
のギヤケース１側端の一部に空気の吸入口４５を開口
し、その反対側の端板６に、吐出口４６が開口してい
る。前記吸入口４５の外気との通路はギヤケース１内空
間とは別個で、前記通路はギヤケース内空間に対し、回
転軸４１の軸封装置４８及び軸受４３’の軸受室の隔壁
により密封・遮断されており（図４参照）、その開口部
には吸入空気の容量制御装置（アンローダ）９を備えて
いる。前記吐出口４６の開口部は、中間段通路２０を通
してギヤケース１内空間に連通している。前記ギヤケー
ス１内空間は、外気に対し封止され、かつ、低圧段圧縮
機のシリンダ２内とも同回転軸４１，４１’に設けた軸
封装置４８及び軸受４３’の軸受室を形成する隔壁によ
って密封、遮断されている。また、低圧段圧縮機のおす
ロータ４の吐出側軸受室６１下方を上記中間段通路２０
に開放している（図１，２参照）。[Low-Pressure Stage Compressor] Referring to FIGS.
The air inlet 45 is opened at a part of the end of the gear case 1 side , and the outlet 46 is opened at the end plate 6 on the opposite side. Passage with outside air of the intake port 45 is separate from the gear case 1 in a space, the passage to the gear case space, times <br/> bearing chamber of the partition walls of the shaft seal device 48 and the bearing 43 of the rotating shaft 41 ' (See FIG. 4), and a capacity control device (unloader) 9 for intake air is provided at the opening. Opening of the discharge port 46 communicates through an intermediate stage passage 20 between the gear case 1 in an empty. The gear case 1 in a spatial is sealed against the outside air, and forms a bearing chamber of both the cylinder 2 of the low-pressure compressor 'shaft seal device 48 and a bearing 43 provided in the' same rotating shaft 41, 41 It is sealed and blocked by a partition wall. Further, the intermediate stage passage 20 to the discharge side shaft receiving chamber 61 below the vinegar rotor 4 of the low-pressure compressor
(See FIGS. 1 and 2).
【００２０】 そして、めすロータ４’の吐出側軸受室
６１’は、めすロータ４’の吸入閉じ込み後１ピッチの
作用空間に連通している。しかし、めすロータ４’のギ
ヤケース側軸受４３’の軸受室をギヤケース１内空間に
開放した構成の場合には、軸受４３’とめすロータ４’
の端面との間の吸入側回転軸４１’に軸封装置を設ける
と共に、ロータ４，４’の吐出側軸受室６１，６１’
を、それぞれ前記中間段通路２０に連通する。[0020] Then, 'the discharge side shaft receiving chamber 61' of the female rotor 4 is in communication with the interaction space of the suction confining after one pitch of the female rotor 4 '. However, in the case of a configuration having an open bearing chamber 'gear case side bearings 43' of the female rotor 4 between the gear case 1 in a sky, bearing 43 'and the female rotor 4'
'Provided with a shaft sealing device, the rotor 4, 4' suction side rotary shaft 41 between the end face of the discharge side shaft of the receiving chamber 61, 61 '
Are respectively connected to the intermediate stage passage 20.
【００２１】 シリンダ２の下側中央部に一体的に取り
付けた箱状部材２１（図１参照）は、その内部空間をシ
リンダ２に穿設した孔２２，２２’を通して、作用空間
に連通し、オイルクーラを通って冷却した潤滑油を受入
れ、少なくとも前記低圧段圧縮機の吸入閉じ込み後１ピ
ッチの作用空間に、当該孔２２，２２’から噴射して前
記作用空間で断熱圧縮される空気を冷却し、また、ロー
タ噛み合い面相互のシール、シリンダ内面及び軸受に対
する潤滑作用を行う。なお、図で「ＯＩＬ」の文字を付
した矢印は潤滑油の供給孔を示している。図４中、シリ
ンダ２の横胴中間部に開口する孔２３は、高圧段圧縮機
の吐出側軸受室７１，７１’に連通しており、同室に滞
留する潤滑油を低圧段圧縮機に回収する。また、軸受室
７１，７１’の圧力を低下させ、回転軸５１，５１’に
対し吸入口方向へのスラストが低減するようにしてい
る。The box-shaped member 21 integrally attached to the lower central portion of the cylinder 2 (see FIG. 1), through holes 22 and 22 'bored its internal space in the cylinder 2 communicates with a work space accepts lubricating oil cooled through the oil cooler, the action space of at least the intake closing Ji write after 1 pitch of the low-pressure compressor, is adiabatically compressed in the interaction space by ejecting from the hole 22, 22 ' air cooling, the rotor engaging surface Mutual seal performs lubricating action against the inner surface of the cylinder and the bearing. The arrow marked with letter "OIL" in the figure shows the supply hole Namerayu Jun. In Figure 4, holes 23 open to Yokodo middle portion of the cylinder 2 is communicated with the discharge side shaft receiving chamber 71, 71 'of the high-pressure compressor, a low pressure stage compressor to you staying sharing the Jun Namerayu Collect to machine . Also, 'reducing the pressure of the rotating shaft 51, 51' bearing chamber 71, 71 is thrust to the suction port direction so as to reduce to.
【００２２】〔高圧段圧縮機〕 一方、図１，５を参照して、高圧段圧縮機本体はシリン
ダ３のギヤケース１側端の一部に吸入口５５が開口して
前記ギヤケース１内の空間と連通し、ギヤケースと反対
側の端板７に吐出口５６が開口している。すなわち、高
圧段圧縮機の吸入口５５は、ギヤケース１内空間及び中
間段通路２０を介して、低圧段圧縮機の吐出口４６と連
通している。したがって、前述のギヤケース１内空間
は、外気環境に対し気密にシールされていなければなら
ない。要するに本実施形態におけるギヤケース１は、従
来の並列配置形スクリュ二段圧縮機が具備するインレッ
トケースの機能を兼ね備えている。[0022] [high-pressure compressor] Meanwhile, referring to FIGS. 1 and 5, an empty high-pressure compressor body suction inlet 55 is opened in a part of the gear case 1 side end of the cylinder 3 in the gear case 1 Communicating with the space , opposite to the gear case
A discharge port 56 is opened in the end plate 7 on the side . That is, the suction port 55 of the high-pressure compressor via a gear case 1 in spatial and interstage passage 20 is communicated with the discharge port 46 of the low-pressure stage compressor <br/>. Therefore, inter-vivo gear case 1 described above, must be hermetically sealed relative to the outside air environment. In short, the gear case 1 in the present embodiment also has the function of the inlet case provided in the conventional parallel-arranged screw two-stage compressor.
【００２３】 図２にも示すレリーフバルブ１３は、前
述ギヤケース１に取り付けてあり、前記レリーフバルブ
１３の吸気側をギヤケース１内空間と連通し、前記レリ
ーフバルブ１３の排気側をスプリングによりギヤケース
内方向に付勢されたピストンを介して図示してないレシ
ーバタンクに連通している。シリンダ３内に開口する潤
滑油供給孔３２は、高圧段圧縮機の吸入閉じ込み後１ピ
ッチの作用空間に、該孔３２から潤滑油を噴射・供給し
て作用空間内で圧縮される空気を冷却すると共に、ロー
タ噛み合い面相互のシール、シリンダ内面、軸受に対す
る潤滑作用を行うよう設けてある。さきに述べたとお
り、高圧段圧縮機の被駆動ギヤ５４の直径Ｄ2 は、ロー
タ５の径Ｄ1 よりも小さい。The relief valve 13 shown in Figure 2, is attached to the aforementioned gear case 1, communicates with the inter-gear case 1 in an empty intake side of the relief valve 13, the Lelie
Gear case by spring on the exhaust side of valve 13
Communicates with a receiver tank which is not shown FIG via a biased piston inwardly direction. Lubricating oil supply hole 32 which opens into the cylinder 3, the working space of the inhalation confining after one pitch of the high-pressure compressor, is compressed in the working space by injecting and supplying the pores 32 or RaJun Namerayu that with the air is cooled, the rotor mating surface Mutual seal, the inner surface of the cylinder, is provided to perform the lubricating function for the bearings. As described above, the diameter D 2 of the driven gear 54 of the high-pressure compressor is smaller than the diameter D 1 of the rotor 5.
【００２４】 図１，２を参照して、高圧段圧縮機の吐
出口56は、図示していないレシーバタンクに連通する吐
出管７２に対し開口している。前記吐出管７２とレシー
バタンクとの間には逆止弁７３が設けてあり、圧縮機の
作動が停止した際にレシーバタンク内の高圧空気が圧縮
機内に逆流しないようにしている。Referring to FIGS. 1 and 2, the discharge port 56 of the high-pressure compressor is open to a discharge pipe 72 communicating with a receiver tank (not shown). A check valve 73 is provided between the discharge pipe 72 and the receiver tank to prevent the high-pressure air in the receiver tank from flowing back into the compressor when the operation of the compressor is stopped.
【００２５】 吐出側軸受室７１，７１’の空間は通路
を介して、図４に示すように低圧段圧縮機のシリンダ２
の横胴中間部に設けた油回収孔２３に連通している。こ
の油回収孔２３のシリンダ壁開口位置は、ロータ歯面と
シリンダ壁とによって形成される作用空間の吸入閉じ込
み後１ピッチ進んだ空間と連通している。本発明実施形
態では、低圧段圧縮機と高圧段圧縮機との圧縮比を同じ
にすると比動力〔吐出空気量当りの消費動力（ＫＷ／ｍ
3 ／ｍｉｎ）〕が良くなるので、中間段通路内の圧力
は、最終絶対圧力の平方根の値であることが理想的であ
る。一方、各段圧縮機の吸入口側と吐出口との圧力差を
比較すると、低圧段圧縮機の圧力差よりも高圧段圧縮機
の圧力差の方が遥かに大きくなるから、高圧段圧縮機の
圧縮作用に伴って回転軸に生じるスラスト力は、圧力差
と同様に低圧段圧縮機のそれよりも大きい。The space of ejection outlet side shaft receiving chamber 71, 71 'via a passage, the cylinder 2 of the low-pressure compressor 4
Is connected to an oil recovery hole 23 provided in the middle portion of the horizontal trunk. The opening position of the cylinder wall of the oil recovery hole 23 communicates with a space that is advanced by one pitch after suction closing of the working space formed by the rotor tooth surface and the cylinder wall. In the embodiment of the present invention, when the compression ratios of the low-pressure stage compressor and the high-pressure stage compressor are made the same, the specific power [power consumption per discharge air amount (KW / m
3 / min)], the pressure in the intermediate stage passage is ideally the value of the square root of the final absolute pressure. On the other hand, comparing the pressure difference between the suction port side and the discharge port of each stage compressor, the pressure difference of the high pressure stage compressor is much larger than the pressure difference of the low pressure stage compressor. thrust force caused by the compression applied to the rotation axis is greater than that of the low-pressure compressor as well as the pressure difference.
【００２６】 そのため、高圧段圧縮機における上記ス
ラスト力は、はすば歯車駆動による逆スラスト力よりも
大きいので、高圧段圧縮機の吐出側回転軸端にかかる圧
力を低圧段圧縮機の吸入閉じ込み後１ピッチの作用空間
に回収して高圧段圧縮機の吐出側軸受室の圧力を低下さ
せ、回転軸に逆スラストを生じさせ、圧縮作用に伴って
生じる前記スラスト力を相殺する。これにより、前記軸
受室７１，７１’内の潤滑油の回収も比較的適正に行わ
れると同時に、圧縮機の性能低下も全く認められない。
本発明油冷式スクリュ二段圧縮機の実施形態の詳細は、
以上述べたとおりで、次に、その作動について概略説明
する。[0026] Therefore, the scan <br/> last force in the high-pressure compressor, rather than the reverse thrust force due to the gear drive helical
The size is Ino, reducing the pressure of the discharge-side bearing chamber of the high-pressure compressor to recover the pressure on the discharge side rotation shaft end of the high-pressure compressor to the interaction space of the suction confining after one pitch of the low-pressure compressor This causes reverse thrust on the rotating shaft to cancel the thrust force generated by the compression action. As a result, the lubricating oil in the bearing chambers 71 and 71 'can be collected relatively properly, and at the same time, the performance of the compressor is not deteriorated at all.
Details of the embodiment of the oil-cooled screw two-stage compressor of the present invention,
As described above, the operation will be briefly described below.
【００２７】[0027]
【作用】アンローダ９を介して外気を、低圧段圧縮機の
吸入口45からロータ４，４’の作用空間に取り込み、同
空間の閉じ込み後にシリンダ２に設けた孔２２，２２’
から潤滑油を作用空間に噴射して、ロータ噛み合い面相
互、シリンダ内壁・端面との間のシール及び潤滑、ロー
タ、シリンダ等の冷却を行う。低圧段圧縮機のおすロー
タ４は、ギヤケース１内に装架した駆動ギヤ８、被駆動
ギヤ４４を介して増速運転している。The outside air is taken into the working space of the rotors 4 and 4 'from the suction port 45 of the low-pressure stage compressor via the unloader 9, and the holes 22 and 22' provided in the cylinder 2 after the space is closed.
Or RaJun Namerayu the by injecting the working space, the rotor mating surface each other, sealing and lubrication between the cylinder inner wall, the end faces, the rotor, the cooling of the cylinder are performed. The male rotor 4 of the low-pressure compressor operates at a higher speed via a drive gear 8 and a driven gear 44 mounted in the gear case 1.
【００２８】 前記ギヤは、はすば歯車からなり、駆動
ギヤ８と被動ギヤ４４の歯の捻じれ方向と回転方向は、
回転軸に対し圧縮作用により発生するスラスト力と反対
方向に逆スラスト力が作用するように設けたので、その
駆動回転中、回転軸４１に吐出口４６方向（図中、右か
ら左方向に）の逆スラスト力を与え、それが作用空間内
で圧縮されている空気の圧力に基づきロータ４，４’の
回転軸４１，４１’に作用する吸入口方向（図中、左か
ら右方向へ）のスラスト力と相殺する。The gear is composed of a helical gear, and the torsional direction and the rotational direction of the teeth of the drive gear 8 and the driven gear 44 are
Since the reverse thrust force is applied to the rotating shaft in a direction opposite to the thrust force generated by the compression action, the rotating shaft 41 is directed toward the discharge port 46 (from right to left in the figure) during the driving rotation. , Which acts on the rotating shafts 41, 41 'of the rotors 4, 4' based on the pressure of the air compressed in the working space (from left to right in the figure). Offset with the thrust force of
【００２９】 低圧段圧縮機の圧縮作用に伴いロータの
回転軸に生じるスラスト力は、はすば歯車の増速駆動に
よって生じる逆スラスト力と略、同量であるため別にス
ラスト力相殺のための手段を必要としないので、吐出側
軸受室を中間段通路に連通してロータ両回転軸端に掛か
る力の釣合いを図っている。これにより、軸受４２…５
３’に掛かるスラスト力が軽減され、軸受装置を小型化
することが可能になる。この増速ギヤ手段には、ギヤケ
ース１に設けた孔１１，１２から潤滑油を射出・供給し
て歯面の潤滑・冷却を行う一方、余剰の潤滑油をギヤケ
ース１の底部に収集・滞留させる。The thrust force produced <br/> rotation axis of the rotor due to the compression action of the low-pressure stage compressor, reverse thrust force generated by overdriving the helical gear substantially, apart from the thrust force for a same amount It does not require a means for offsetting, thereby achieving the balance of forces on the b over data two rotary shaft ends communicated with the discharge-side bearing chamber intermediate stage passage. Thereby, the bearings 42... 5
The thrust force applied to 3 ′ is reduced, and the size of the bearing device can be reduced. In this speed increasing gear means, lubricating oil is injected and supplied from holes 11 and 12 provided in the gear case 1 to lubricate and cool the tooth surface, while excess lubricating oil is collected and accumulated at the bottom of the gear case 1. .
【００３０】 低圧段圧縮機の吐出口４６からギヤケー
ス１内の空間までの中間段通路２０とロータ４，４’の
吐出側軸受４２，４２’の軸受室６１，６１’とを連通
して軸受室６１内の潤滑油を中間段通路２０に回収する
と共に、低圧段圧縮機の吸入側及び吐出口側の回転軸の
軸端に加わる圧力差をなくして、それに基づき全負荷時
に吐出口４６側に推される逆スラストが高まらぬように
し、もって、軸受４２，４２’、４３，４３’の負荷を
小さく摩耗を少なくし同軸受の小型化を可能とする。ま
た、軸受室６１，６１’空間に軸受を潤滑した後の潤滑
油が滞留しないので、軸受の油撹拌ロスが低減する。た
だし、この場合はロータのギヤケース側回転軸４１’の
軸受４３’の軸受室が、ギヤケース１内空間に開放され
た構造を採用していることが条件となる。[0030] the discharge port of the low-pressure stage compressor 4 6 or et al. Giyake
The intermediate stage passage 20 to the space in the rotor 1 communicates with the bearing chambers 61, 61 'of the discharge-side bearings 42, 42' of the rotors 4, 4 '.
To recover the lubricating oil in the bearing chamber 61 to the intermediate stage passage 20
Together, eliminating the pressure differential exerted on the shaft end of the rotating shaft of the suction-side and discharge port side of the low-pressure stage compressor, so unexpected reverse thrust Takamara be pushed to the discharge port 46 side at the time of full load and based on, it has been Thus, the load on the bearings 42, 42 ', 43, 43' is reduced and wear is reduced, and the bearings can be miniaturized. In addition, since the lubricating oil after lubricating the bearing does not stay in the bearing chambers 61 and 61 ', the oil agitation loss of the bearing is reduced. However, the bearing chamber of the 'bearing 43' of this case is a gear case side rotating shaft 41 of the rotor, it is a condition that employ open structure between the gear case 1 in an empty.
【００３１】 ロータのギヤケース側回転軸４１’の軸
受４３’の軸受室がギヤケース１内の空間と遮断されて
いる構造の場合は、前記軸受室６１の空間を中間段通路
２０に連通させ、別に軸受室６１’の空間は、低圧段圧
縮機のロータの吸入閉じ込み後１ピッチの作用空間に連
通することにより、ロータの回転軸に掛かるスラスト力
を削減するようにしている。この際は、回転軸４１’の
軸受４３’の軸受室の内圧力が、ギヤケース１内の圧力
の影響を受けないからである。このようにして、上記各
軸受に掛かる力を小さくすることができ、軸受装置の小
型化を可能とする。[0031] For structures bearing chamber 'bearing 43' the gear case side rotary shaft 41 of the rotor is blocked and between empty gear case 1, communicates the space of the bearing chamber 61 to the intermediate stage passage 20, space of the bearing chamber 61 'is apart from, by communicating with the interaction space of the suction confining after one pitch of the rotor of the low-pressure compressor, and the so that lessen cutting the thrust force applied to the rotation axis of the rotor. At this time, the pressure inside the bearing chamber of the bearing 43 ′ of the rotating shaft 41 ′ is not affected by the pressure inside the gear case 1 . Thus, the force applied to each of the bearings can be reduced, and the size of the bearing device can be reduced.
【００３２】 また、軸部に設けた各軸封装置４７…４
８及び隔壁は、ロータの作用空間とギヤケース１内空
間、軸受室等との間の空気の流通（洩れ）をなくし、こ
れによって、圧縮機の圧縮効率の向上を図る。その外、
さきに述べたとおり、高圧段圧縮機のロータ５，５’の
吐出側軸受室７１，７１’の圧力を可及的に低下せし
め、回転軸５１，５１’の端面が吸入側に推される力が
高まらぬようにして、もって軸受５１，５１’、５２，
５２’に掛かるスラスト負荷を小さく摩耗を少なくし小
型軸受の使用を可能としている。さらに、軸受室７１，
７１’の空間には潤滑油が滞留しないから、軸受による
潤滑油撹拌ロスが軽減される。Each of the shaft sealing devices 47... 4 provided on the shaft portion
8 and the partition eliminate air flow (leakage) between the working space of the rotor and the space inside the gear case 1, the bearing chamber, and the like, thereby improving the compression efficiency of the compressor. Besides that,
As described above, the pressure in the discharge-side bearing chambers 71, 71 'of the rotors 5, 5' of the high-pressure stage compressor is reduced as much as possible, and the end faces of the rotating shafts 51, 51 'are pushed to the suction side. The bearings 51, 51 ', 52,
The thrust load applied to 52 'is small and the wear is reduced, so that a small bearing can be used. Further, the bearing chamber 71,
Since the lubricating oil does not stay in the space 71 ', lubricating oil stirring loss by the bearing is reduced.
【００３３】 中間段通路２０は、ギヤケース１の内部
に開口するから、低圧段圧縮機の吐出口４６から排出さ
れる高圧空気・オイルミストがギヤケース１内空間に充
満し、増速ギヤ、各軸受装置、その他の潤滑を行う。ま
た、前記高圧空気・オイルミストは、すべて高圧段圧縮
機の吸入口５５から、その作用空間に吸い込まれる。こ
のような構造を採用しているので本実施形態は、従来装
置に比べて構造が簡単である。Since the intermediate stage passage 20 opens inside the gear case 1, high-pressure air / oil mist discharged from the discharge port 46 of the low-pressure stage compressor fills the space inside the gear case 1, and the speed-increasing gear and each bearing Lubricate equipment and other. The high-pressure air and oil mist are all sucked into the working space from the suction port 55 of the high-pressure compressor. Since such a structure is employed, the structure of the present embodiment is simpler than that of a conventional device.
【００３４】 そのため、構成部品点数が節減され、余
分な機械加工、シール部構造の組立て、検査等の手間を
省くことができる。のみならず、装置全体の寸法を縮小
することができ、圧縮機容量の大きさに比べて狭いスペ
ースでも設置することが可能になる。ギヤケース１に設
けたレリーフバルブ１３は前記ギヤケース内圧力がスプ
リングにより予め設定された圧力を超えた場合、前記ス
プリングによりギヤケース内方向に付勢されているピス
トンを押し上げ、前記レリーフバルブの吸気側と排気側
の通路を連通し、前記ギヤケース内圧力を図示していな
いレシーバタンクに逃がすようにしており、万一、低圧
段圧縮機のみ作動して高圧段圧縮機が機能しない等の事
故が発生しても、ギヤケース１内圧力が異常上昇しない
よう用意されている。Therefore, the number of component parts can be reduced, and labor such as extra machining, assembling of a seal portion structure, and inspection can be omitted. Not only that, the overall size of the apparatus can be reduced, and the apparatus can be installed in a space that is narrower than the capacity of the compressor. When the pressure in the gear case exceeds a pressure set in advance by a spring, the relief valve 13 provided in the gear case 1 pushes up a piston urged in the gear case inward by the spring, and the intake side of the relief valve and the exhaust Side, and the pressure in the gear case is allowed to escape to a receiver tank (not shown). In the unlikely event that only the low-pressure compressor operates and the high-pressure compressor does not function, an accident occurs. Are also prepared so that the pressure inside the gear case 1 does not rise abnormally.
【００３５】 高圧段圧縮機の吸入口５５は、ギヤケー
ス１内空間に向いて開口しており、その底部はロータ
５，５’の外周と一致し、かつ、前記ロータ５，５’の
径Ｄ1 を、被駆動ギヤ５４の径Ｄ2 よりも大きくしてい
る。そのため、ギヤケース１の底部に滞留する余剰潤滑
油の油面は、ロータ５の外周面下側よりも上方に上がる
ことがない。すなわち、潤滑油の油面がロータ５の外周
面下側よりも上方になるまで溜りそうになると、その分
だけ高圧段圧縮機の吸入口55から作用空間内に流れ込
み、潤滑油が吸い込まれてしまうからである。The high-pressure compressor suction port 55 is opened toward between Giyake <br/> scan 1 in air, its bottom coincides with the outer periphery of the rotor 5, 5 ', and the rotor 5 the diameter D 1 of the 5 'is made larger than the diameter D 2 of the driven gear 54. Therefore, the oil level of the surplus lubricating oil staying at the bottom of the gear case 1 does not rise above the lower side of the outer peripheral surface of the rotor 5. That is, when the oil level of the lubricating oil is about to reservoir until above the outer circumferential surface below the rotor 5, that much flows into the suction port 55 or al works for the space of the high pressure stage compressor, the lubricating oil is sucked This is because
【００３６】 この吸い込まれた潤滑油が高圧段圧縮機
のロータ噛み合い面相互、シリンダ内壁・端面との間の
潤滑及びシール作用及びロータ、シリンダ等の冷却を行
うことは勿論である。そのため、ギヤケース１の底部に
滞留する余剰潤滑油を別の方法を使って外部へ排出する
必要がなく、しかも、この油面を被駆動ギヤ５４が撹拌
することがないから、オイル撹拌による無用のエネルギ
ーの消費を抑えることができる。Of course, the lubricating oil sucked in performs lubrication and sealing between the rotor meshing surfaces of the high-pressure stage compressor, the inner wall and the end surface of the cylinder, and cools the rotor, the cylinder, and the like. Therefore, it is not necessary to discharge the surplus lubricating oil remaining at the bottom of the gear case 1 to the outside by another method, and the driven gear 54 does not agitate the oil surface. Energy consumption can be suppressed.
【００３７】 以上、述べたように、ギヤケース１の底
部に滞留する余剰潤滑油は、高圧段圧縮機の作用空間を
通って吐出口から排出されるから、従来装置のように、
別途にギヤケース１に対し専用の潤滑油排油管を設ける
必要がない。さきに説明したように高圧段圧縮機の場合
も、そのシリンダ３の中間部に潤滑油の供給孔３２を設
けて、作用空間内に噴射し、潤滑及びシール、冷却して
いることは、低圧段圧縮機の場合と同様である。また、
吐出側軸受室７１，７１’の空間を、低圧段圧縮機のシ
リンダ２の横胴中間部に連通していること、それに基づ
く効果は、さきに述べたとおりである。高圧段圧縮機の
吐出口５６は、吐出管７２、逆止弁７３を介して、図示
してないレシーバタンクに連通している。As described above, the surplus lubricating oil staying at the bottom of the gear case 1 is discharged from the discharge port through the working space of the high-pressure stage compressor.
There is no need to separately provide a dedicated lubricating oil drain pipe for the gear case 1. In the case of high-pressure compressor as described previously, with the supply holes 32 Jun Namerayu the middle portion of the cylinder 3 is provided, and injected into the action space, lubrication and sealing, is that it is cooled, This is the same as in the case of the low-pressure stage compressor. Also,
The space of the discharge-side bearing chambers 71 and 71 'is communicated with the middle portion of the horizontal barrel of the cylinder 2 of the low-pressure stage compressor, and the effect based thereon is as described above. The discharge port 56 of the high-pressure compressor communicates with a receiver tank (not shown) via a discharge pipe 72 and a check valve 73.
【００３８】[0038]
【発明の効果】本発明油冷式スクリュ二段圧縮機は、以
上の構成よりなるから、 （１）低圧段圧縮機の吐出側軸受室を中間段通路に接続
することにより、全負荷時における過度の逆スラスト荷
重の発生を抑える。 （２）インレットケースとギヤケースとを兼用する構成
としたので、部品点数及び組立て工数を低減し、また、
圧縮機本体の小型化を図ることができる。 （３）高圧段圧縮機の吐出側軸受室の圧力を低圧段圧縮
機の作用空間に開放することにより、前記軸受室の圧力
が低下し、吐出口側から吸入口側に向かって作用するス
ラスト荷重が低下する。よって軸受にかかる負荷を軽減
することができる。The oil-cooled screw two-stage compressor of the present invention has the above configuration. (1) By connecting the discharge-side bearing chamber of the low-pressure stage compressor to the intermediate stage passage, the load at full load can be reduced. Suppress excessive reverse thrust load. (2) Since the inlet case and the gear case are also used, the number of parts and the number of assembling steps can be reduced.
The size of the compressor body can be reduced. (3) By releasing the pressure in the bearing chamber on the discharge side of the high-pressure stage compressor to the working space of the low-pressure stage compressor, the pressure in the bearing chamber decreases, and thrust acting from the discharge port side to the suction port side. The load decreases. Therefore, the load on the bearing can be reduced.
【００３９】 （４）ギヤケースの下部に溜った潤滑油
が、高圧段圧縮機のスクリュロータに引かれて移送さ
れ、その油面が常に、高圧段圧縮機の増速ギヤの外径よ
りも低くなるので、当該ギヤが潤滑油を撹拌することが
ない。よって、油撹拌ロスを低減することができる。 （５）ギヤケース内に滞留する潤滑油の油回収用配管が
不要となって、従来装置の場合のように前記配管を取り
付ける下部スペースが不要となり、圧縮機のパッケージ
ングをコンパクトにすることができる。等々、従来、公
知の油冷式スクリュ二段圧縮機に比べ、圧縮機本体の簡
素化、コンパクト化によるコストダウンを図ることがで
き、公知のスクリュ二段式圧縮機には期待することがで
きない、格別の作用、効果を奏するものとなる。(4) The lubricating oil collected in the lower part of the gear case is drawn and transferred by the screw rotor of the high-pressure compressor, and its oil level is always lower than the outer diameter of the speed increasing gear of the high-pressure compressor. Therefore, the gear does not stir the lubricating oil. Therefore, oil stirring loss can be reduced. (5) There is no need for an oil recovery pipe for the lubricating oil staying in the gear case, so there is no need for a lower space for mounting the pipe as in the case of the conventional apparatus, and the compressor can be made compact in packaging. . For example, compared to the conventionally known oil-cooled screw two-stage compressor, the compressor body can be simplified and the cost can be reduced by downsizing, and cannot be expected from the known screw two-stage compressor. , And have a special action and effect.
【図１】本発明油冷式スクリュ二段圧縮機の実施の形態
例で、図２におけるＡ−Ａ線に沿う側断面図を示す。1 shows an embodiment of an oil-cooled screw two-stage compressor according to the present invention, and shows a side sectional view taken along line AA in FIG.
【図２】一部を切り欠いて示す、図１におけるＢ−Ｂ矢
視図である。FIG. 2 is a view cut along a line BB in FIG.
【図３】図１におけるＣ−Ｃ線断面矢視図である。FIG. 3 is a sectional view taken along line CC in FIG. 1;
【図４】図２におけるＤ−Ｄ線に沿う側断面図を示す。FIG. 4 is a sectional side view taken along the line DD in FIG. 2;
【図５】図２におけるＥ−Ｅ線に沿う側断面図である。FIG. 5 is a side sectional view taken along the line EE in FIG. 2;
１ ギヤケース ２ 低圧圧縮機側シリンダ ３ 高圧圧縮機側シリンダ ４，４’ 低圧圧縮機側おす・めすロータ ５，５’ 高圧圧縮機側おす・めすロータ ６ 低圧段圧縮機吐出口側端板 ７ 高圧段圧縮機吐出口側端板 ８ 駆動ギヤ DESCRIPTION OF SYMBOLS 1 Gear case 2 Low pressure compressor side cylinder 3 High pressure compressor side cylinder 4, 4 'Low pressure compressor side male / female rotor 5, 5' High pressure compressor side male / female rotor 6 Low pressure stage compressor discharge port side end plate 7 High pressure Stage compressor discharge port side end plate 8 Drive gear
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−197685（ＪＰ，Ａ) 特開 昭60−249693（ＪＰ，Ａ) 特開 昭48−21806（ＪＰ，Ａ) 実開 平６−1790（ＪＰ，Ｕ) 実開 昭62−41889（ＪＰ，Ｕ) 実開 昭51−162307（ＪＰ，Ｕ) 実公 平６−36312（ＪＰ，Ｙ２) 実公 昭52−8082（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F04C 23/00 F04C 18/16 F04C 29/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-197685 (JP, A) JP-A-60-249693 (JP, A) JP-A-48-21806 (JP, A) 1790 (JP, U) JP-A 62-41889 (JP, U) JP-A 51-162307 (JP, U) Jiko 6-36312 (JP, Y2) Jiko 52-8082 (JP, Y2) (58) Field surveyed (Int. Cl. 7 , DB name) F04C 23/00 F04C 18/16 F04C 29/00
Claims (8)
タを収納・噛み合わせ、各スクリュロータの回転軸の両
側を軸受で軸支して形成した低圧段及び高圧段圧縮機
を、ギヤケースの一側面の略、上下方向に、各圧縮機の
回転軸が平行になるように並列・配置し、前記ギヤケー
スに内装した増速ギヤ手段により、各圧縮機を駆動し、
前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入口を
前記ギヤケース内空間に連通してなる油冷式スクリュ二
段圧縮機において、前記 低圧段圧縮機のシリンダ内と、ギヤケース内空間及
び前記シリンダを挟んでギヤケースと反対側に配置する
軸受室との間の各一対の軸部に、それぞれ軸封装置を設
け、 前記シリンダを挟んでギヤケースと反対側に配置する軸
受室の少なくとも一方と、前記ギヤケース内空間との間
を連通したことを特徴とする油冷式スクリュ二段圧縮
機。1. A into the cylinder, male and female screw rotors store and engaging the low pressure stage and high pressure stage compressor formed on both sides of the rotational axis of each screw rotors and pivotally supported by a bearing
Of each compressor in the vertical direction, roughly on one side of the gear case.
The compressors are driven in parallel by arranging and arranging the rotating shafts in parallel with each other by means of speed increasing gears built in the gear case,
The discharge port of the low- pressure stage compressor and the suction port of the high-pressure stage compressor
In oil-cooled type screw two-stage compressor comprising communicating to the gear case space, and the cylinder of the low-pressure compressor, gear case space及
Each pair of shaft portions between the <br/> bearing chamber arranged on the opposite side of the gear case across the fine said cylinder, respectively provided shaft sealing device, the shaft to be placed on the opposite side of the gear case across the cylinder A two-stage oil-cooled screw compressor characterized in that at least one of the receiving chambers communicates with the space inside the gear case.
タを収納・噛み合わせ、各スクリュロータの回転軸を両
側を軸受で軸支して形成した低圧段及び高圧段圧縮機
を、ギヤケースの一側面の略、上下方向に、各圧縮機の
回転軸が平行になるように並列・配置し、前記ギヤケー
スに内装した増速ギヤ手段により、各圧縮機を駆動し、
前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入口を
前記ギヤケース内空間に連通してなる油冷式スクリュ二
段圧縮機において、前記 低圧段圧縮機のおす・めすスクリュロータのいずれ
か一方のギヤケース側回転軸端に被駆動ギヤを固定し、 前記一方のスクリュロータの、ギヤケース側及び前記シ
リンダを挟んでギヤケースと反対側の軸部に、それぞれ
軸封装置を設けると共に、前記シリンダを挟んでギヤケ
ースと反対側に配置する軸受室と、前記ギヤケース内空
間とを連通し、 他方のスクリュロータのギヤケース側に配置する軸受室
を前記ギヤケース内空間に対し隔壁によって遮断する一
方、スクリュロータの前記シリンダを挟んでギヤケース
と反対側の軸部に軸封装置を設けると共に、前記シリン
ダを挟んでギヤケースと反対側に配置する軸受室と、前
記低圧段圧縮機における吸入閉じ込み後１ピッチの作用
空間とを連通したことを特徴とする油冷式スクリュ二段
圧縮機。Wherein in the cylinder, male and female screw rotors store and engaging the low pressure stage and high pressure stage compressor formed by rotatably supporting the rotating shaft on both sides with a bearing of the screw rotor
Of each compressor in the vertical direction, roughly on one side of the gear case.
The compressors are driven in parallel by arranging and arranging the rotating shafts in parallel with each other by means of speed increasing gears built in the gear case,
The discharge port of the low- pressure stage compressor and the suction port of the high-pressure stage compressor
In oil-cooled type screw two-stage compressor comprising communicating to the gear case space, a driven gear fixed to one of the gear case side rotation shaft end of the low-pressure compressor of male and female screw rotors, the one A shaft chamber is provided on a shaft portion of the screw rotor on the gear case side and on a side opposite to the gear case with the cylinder interposed therebetween, and a bearing chamber disposed on the opposite side of the gear case with the cylinder interposed therebetween; and a space inside the gear case. While the bearing chamber arranged on the gear case side of the other screw rotor is blocked by the partition against the space inside the gear case, while the gear case is sandwiched by the cylinder of the screw rotor.
And provided with a shaft sealing device in the axial portion opposite, in communication with the bearing chamber to be placed on the opposite side of the gear case across the cylinder, and a work space of one pitch after inclusive suction shut in the low-pressure compressor An oil-cooled screw two-stage compressor.
タを収納・噛み合わせ、各スクリュロータの回転軸を両
側を軸受で軸支して形成した低圧段及び高圧段圧縮機
を、ギヤケースの一側面の略、上下方向に、各圧縮機の
回転軸が平行になるように並列・配置し、前記ギヤケー
スに内装した増速ギヤ手段により、各圧縮機を駆動し、
前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入口を
前記ギヤケース内空間に連通してなる油冷式スクリュ二
段圧縮機において、前記 高圧段圧縮機のおす・めすスクリュロータのいずれ
か一方のギヤケース側回転軸端に被駆動ギヤを固定し、
前記被駆動ギヤの外径を、前記一方のスクリュロータの
外径よりも小径にして、被駆動ギヤの外径下側よりも高
圧段圧縮機の吸入口下側を低くしたことを特徴とする油
冷式スクリュ二段圧縮機。To 3. A cylinder, male and female screw rotors store and engaging the low pressure stage and high pressure stage compressor formed by rotatably supporting the rotating shaft on both sides with a bearing of the screw rotor
Of each compressor in the vertical direction, roughly on one side of the gear case.
The compressors are driven in parallel by arranging and arranging the rotating shafts in parallel with each other by means of speed increasing gears built in the gear case,
The discharge port of the low- pressure stage compressor and the suction port of the high-pressure stage compressor
In oil-cooled type screw two-stage compressor comprising communicating to the gear case space, either male and female screw rotors of the high pressure stage compressor
Attach the driven gear to one of the gear case side rotating shaft ends ,
Wherein the outer diameter of the driven gear, said in the smaller diameter than the outer diameter of one of the screw rotors, higher than the outer径下side of the driven gear
An oil-cooled screw two-stage compressor characterized by lowering the suction port lower side of the pressure stage compressor.
タを収納・噛み合わせ、各スクリュロータの回転軸を両
側を軸受で軸支して形成した低圧段及び高圧段圧縮機
を、ギヤケースの一側面の略、上下方向に、各圧縮機の
回転軸が平行になるように並列・配置し、前記ギヤケー
スに内装した増速ギヤ手段により、各圧縮機を駆動し、
前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入口を
前記ギヤケース内空間に連通してなる油冷式スクリュ二
段圧縮機において、前記 高圧段圧縮機のスクリュロータの吐出口側に配置す
る軸受室と、前記低圧段圧縮機の吸入閉じ込み後１ピッ
チの作用空間とを連通したことを特徴とする油冷式スク
リュ二段圧縮機。4. A cylinder, male and female screw rotors store and engaging the low pressure stage and high pressure stage compressor formed by rotatably supporting the rotating shaft on both sides with a bearing of the screw rotor
Of each compressor in the vertical direction, roughly on one side of the gear case.
The compressors are driven in parallel by arranging and arranging the rotating shafts in parallel with each other by means of speed increasing gears built in the gear case,
The discharge port of the low- pressure stage compressor and the suction port of the high-pressure stage compressor
In oil-cooled type screw two-stage compressor comprising communicating to the gear case space, to place the discharge port side of the screw rotor of the high-pressure compressor
That the bearing chamber and the oil-cooled type screw two-stage compressor, characterized in that communication between the work space of the suction confining after one pitch of the low-pressure compressor.
タを収納・噛み合わせ、各スクリュロータの回転軸を両
側を軸受で軸支して形成した低圧段及び高圧段圧縮機
を、ギヤケースの一側面の略、上下方向に、各圧縮機の
回転軸が平行になるように並列・配置し、前記ギヤケー
スに内装した増速ギヤ手段により、各圧縮機を駆動し、
前記低圧段圧縮機の吐出口及び高圧段圧縮機の吸入口を
前記ギヤケース内空間に連通してなる油冷式スクリュ二
段圧縮機において、前記 ギヤケース内空間とレリーフバルブの吸気側とを連
通すると共に、前記レリーフバルブの排気側を高圧段圧
縮機の吐出口からレシーバタンクまでの間に連通したこ
とを特徴とする油冷式スクリュ二段圧縮機。5. A low-pressure stage and a high-pressure stage compressor in which a male / female screw rotor is housed and meshed in a cylinder, and a rotating shaft of each screw rotor is supported on both sides by bearings. Abbreviation, vertical direction of each compressor
The compressors are driven in parallel by arranging and arranging the rotating shafts in parallel with each other by means of speed increasing gears built in the gear case,
The discharge port of the low- pressure stage compressor and the suction port of the high-pressure stage compressor
In oil-cooled type screw two-stage compressor comprising communicating to the gear case space communicated with an intake side of the gear case in the space and the relief valve, the exhaust side of the relief valve from the discharge port of the high-pressure compressor An oil-cooled screw two-stage compressor that communicates with the receiver tank.
を挟んでギヤケースと反対側に設け、これを中間段通路
を介して前記ギヤケース内空間と連通し、 増速ギヤ手
段を構成する各歯車をそれぞれ、はすば歯車としたこと
を特徴とする請求項１または２記載の油冷式スクリュ二
段圧縮機。 6. A discharge port of the low-pressure stage compressor is provided on a side opposite to a gear case with a cylinder interposed therebetween, and communicates with the space in the gear case through an intermediate stage passage to constitute a speed increasing gear means. Each gear is a helical gear
The oil-cooled screw two-stage compressor according to claim 1 or 2, wherein:
ヤケースと反対側に配置するおす・めすスクリュロータ
の各軸受室の下部を、それぞれ通路を介して連通し、 前記各軸受室の内の、いずれか一方の軸受室の下部と、
低圧段圧縮機の吸入閉じ込み後１ピッチの作用空間とを
連通したことを特徴とする請求項４記載の油冷式スクリ
ュ二段圧縮機。7. A lower portion of each bearing chambers of said male and female screw rotors arranged on the opposite side of the gear case across the cylinder of the high-pressure compressor, communicated through the respective passage, of the respective axes receiving chamber The lower part of one of the bearing chambers,
Oil-cooled type screw two-stage compressor according to claim 4, wherein the communicating with the working space of the inhalation confining after one pitch of the low-pressure stage compressor.
ヤケースと反対側に配置するおす・めすスクリュロータ
の各軸受室の下方に中間段通路と連通する開口を設けた
ことを特徴とする請求項６記載の油冷式スクリュ二段圧
縮機。 8. A male / female screw rotor disposed on a side opposite to a gear case with a cylinder of the low-pressure stage compressor therebetween.
Oil-cooled type screw two-stage compressor according to claim 6, characterized in that an opening which communicates with the intermediate-stage passage below each axis receiving chamber of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22460295A JP3349872B2 (en) | 1995-08-10 | 1995-08-10 | Oil-cooled screw two-stage compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22460295A JP3349872B2 (en) | 1995-08-10 | 1995-08-10 | Oil-cooled screw two-stage compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0953583A JPH0953583A (en) | 1997-02-25 |
| JP3349872B2 true JP3349872B2 (en) | 2002-11-25 |
Family
ID=16816303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22460295A Expired - Lifetime JP3349872B2 (en) | 1995-08-10 | 1995-08-10 | Oil-cooled screw two-stage compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3349872B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4493202B2 (en) * | 2000-12-01 | 2010-06-30 | 北越工業株式会社 | Oil-cooled screw two-stage compressor |
| JP5334801B2 (en) * | 2009-11-04 | 2013-11-06 | 株式会社神戸製鋼所 | Two-stage screw compressor and refrigeration system |
| JP5567968B2 (en) * | 2010-09-30 | 2014-08-06 | 株式会社日立製作所 | Multistage centrifugal compressor |
| CN103410729B (en) * | 2013-08-26 | 2015-07-01 | 天津商业大学 | Horizontal fully-closed two-stage screw refrigeration compressor |
| CN112879290B (en) * | 2021-01-25 | 2022-06-14 | 马鞍山赛力文机械有限公司 | Double-screw main machine structure driven by front end gear and rear end gear |
-
1995
- 1995-08-10 JP JP22460295A patent/JP3349872B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0953583A (en) | 1997-02-25 |
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