JP2003278674A - Oil-cooled screw compressor of speed increasing type - Google Patents
Oil-cooled screw compressor of speed increasing typeInfo
- Publication number
- JP2003278674A JP2003278674A JP2002080743A JP2002080743A JP2003278674A JP 2003278674 A JP2003278674 A JP 2003278674A JP 2002080743 A JP2002080743 A JP 2002080743A JP 2002080743 A JP2002080743 A JP 2002080743A JP 2003278674 A JP2003278674 A JP 2003278674A
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- Prior art keywords
- chamber
- gear
- oil
- suction
- speed
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、増速装置を有する
油冷式スクリュ圧縮機において、前記増速装置が潤滑油
を撹拌することによって生ずる動力ロスを低減し、しか
も前記潤滑油による圧縮作用空間内の潤滑・密封性を向
上させた油冷式スクリュ圧縮機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-cooled screw compressor having a speed increasing device, which reduces power loss caused by stirring the lubricating oil by the speed increasing device, and further the compression action by the lubricating oil. The present invention relates to an oil-cooled screw compressor with improved lubrication and sealing properties in a space.
【０００２】[0002]
【従来の技術】原動機の回転を増速装置によって高速回
転させてスクリュロータを駆動する構造の従来の油冷式
スクリュ圧縮機の一例を図８を参照して説明すると、こ
のスクリュ圧縮機１００はケーシング１１６に形成した
ロータ室１０２内に、おす・めすのスクリュロータ１０
１を噛み合い回転可能に収納し、このロータ室１０２の
一方（吸入側）に吸入通路１０７、他方（吐出側）に吐
出通路１１７をそれぞれ連通し、吸入通路１０７を介し
て導入された流体を圧縮して吐出通路１１７より吐出可
能としている。2. Description of the Related Art An example of a conventional oil-cooled screw compressor having a structure for driving a screw rotor by rotating a prime mover at a high speed with a speed increasing device will be described with reference to FIG. A male / female screw rotor 10 is provided in a rotor chamber 102 formed in a casing 116.
1 is rotatably accommodated in the rotor chamber 102. One of the rotor chambers 102 (suction side) is connected to the suction passage 107, and the other (discharge side) of the discharge passage 117 is communicated with the rotor chamber 102. Then, the liquid can be discharged from the discharge passage 117.
【０００３】そして、ケーシング１１６に形成したギヤ
室１０４内に小径の被駆動ギヤ１１０と大径の駆動ギヤ
１１１とを噛み合わせて成る増速ギヤを増速装置１０３
として設け、図示せざる原動機の駆動軸を駆動ギヤ１１
１に連結すると共に、この駆動ギヤ１１１により駆動さ
れる被駆動ギヤ１１０をおす又はめすの何れかのスクリ
ュロータ１０１の軸部に連結して、原動機の駆動軸が回
転すると増速装置１０３の作用により前記駆動軸の回転
が増速されてスクリュロータ１０１に伝達される。Then, a speed increasing gear formed by meshing a driven gear 110 of a small diameter and a driving gear 111 of a large diameter in a gear chamber 104 formed in a casing 116 is a speed increasing device 103.
And a drive shaft of a prime mover (not shown)
1, the driven gear 110 driven by the drive gear 111 is connected to the shaft portion of either the male or female screw rotor 101, and when the drive shaft of the prime mover rotates, the action of the speed increasing device 103 is performed. Thus, the rotation of the drive shaft is accelerated and transmitted to the screw rotor 101.
【０００４】また、前記ケーシング１１６に形成された
吸入通路１０７とギヤ室１０４との間には、それぞれの
空間を完全に遮断する隔壁１０５が設けられ、吸入通路
１０７の底部１０７’とギヤ室１０４の底部１０４’と
を排出管１０６で連通し、噴射ノズル１１３を介してギ
ヤ室１０４内に導入された潤滑油を、この排出管１０６
を介して吸入通路１０７に導入可能としている。Further, a partition wall 105 is provided between the suction passage 107 formed in the casing 116 and the gear chamber 104 so as to completely shut off each space, and a bottom portion 107 ′ of the suction passage 107 and the gear chamber 104 are provided. Of the lubricating oil introduced into the gear chamber 104 through the injection nozzle 113 to the bottom portion 104 ′ of the exhaust pipe 106.
It can be introduced into the suction passage 107 via.
【０００５】このように形成された従来のスクリュ圧縮
機１００にあっては、ノズル１１３を介して増速装置１
０３に噴射された潤滑油Ａがギヤ室１０４の底部１０
４’に過剰に溜まった状態となると、回転に際して駆動
ギヤ１１１及び被駆動ギヤ１１０がこの溜まった潤滑油
を掻き回すこととなり、その際に振動や騒音が発生する
と共に、これらのギヤ１１０，１１１の回転エネルギロ
スを増大させるものとなっている。In the conventional screw compressor 100 thus formed, the speed increasing device 1 is provided through the nozzle 113.
The lubricating oil A injected to the bottom part 10 of the gear chamber 104.
If it becomes excessively accumulated in 4 ', the driving gear 111 and the driven gear 110 will stir the accumulated lubricating oil at the time of rotation, and at that time, vibration and noise are generated, and at the same time, these gears 110, 111 This increases the rotational energy loss.
【０００６】そのため、このような問題を解消するため
に、図示せざる油分離器からの帰還流路１０９をギヤ室
１０４の上部空間部１０８に連通し、油分離器からの高
圧の混合ガスをギヤ室１０４内に導入してギヤ室１０４
内の圧力を高めてギヤ室１０４と吸入通路１０７間の圧
力差によりギヤ室１０４底部１０４’に溜まった潤滑油
Ａを、排出管１０６を介して強制的に吸入通路１０７内
に圧送・排出するように構成している。Therefore, in order to solve such a problem, the return flow path 109 from the oil separator (not shown) is connected to the upper space 108 of the gear chamber 104, and the high-pressure mixed gas from the oil separator is discharged. The gear chamber 104 is introduced into the gear chamber 104.
The internal pressure is increased, and the lubricating oil A accumulated in the bottom 104 ′ of the gear chamber 104 due to the pressure difference between the gear chamber 104 and the suction passage 107 is forcedly pumped and discharged into the suction passage 107 via the discharge pipe 106. Is configured as follows.
【０００７】[0007]
【発明が解決しようとする課題】上述した従来の増速型
油冷式スクリュ圧縮機においては、ギヤ室１０４の底部
に溜まった潤滑油Ａを吸入通路１０７に排出するため
に、ギヤ室１０４の底部１０４’と吸入通路１０７の底
部１０７’とを排出管１０６で連通する構造であること
から、圧縮機１００の下部に排出管１０６が突出し、圧
縮機１００の大型化を招いている。In the above-described conventional speed-increasing oil-cooled screw compressor, in order to discharge the lubricating oil A accumulated at the bottom of the gear chamber 104 to the suction passage 107, Since the bottom portion 104 ′ and the bottom portion 107 ′ of the suction passage 107 are connected by the discharge pipe 106, the discharge pipe 106 projects below the compressor 100, which causes the compressor 100 to be upsized.
【０００８】また、ギヤ室１０４内の圧力を上昇させる
ために帰還流路１０９を介して導入された油分離器から
の混合ガスは高圧ガスであるために、この高圧ガスが潤
滑油Ａと共に排出管１０６を介して吸入通路１０７へ導
入されると、吸入通路１０７内に導入された高圧ガスが
吸入通路１０７内で吸込ガスと同圧になるまで膨張し、
この膨張分、吸入ガスの導入量を減少させることとな
る。そのため、圧縮機の比動力（単位吸入量当たりの消
費動力［kW／m３／min］）を悪化させる原因となってい
る。Further, since the mixed gas from the oil separator introduced through the return flow path 109 for increasing the pressure in the gear chamber 104 is a high pressure gas, this high pressure gas is discharged together with the lubricating oil A. When introduced into the suction passage 107 through the pipe 106, the high-pressure gas introduced into the suction passage 107 expands in the suction passage 107 to the same pressure as the suction gas,
This expansion reduces the amount of intake gas introduced. Therefore, it is a cause of deteriorating the specific power of the compressor (power consumption per unit intake amount [kW / m 3 / min]).
【０００９】さらに、前記圧縮機１００はギヤ室１０４
内を油分離器から導入した高圧ガスによって高圧に保持
する構造のため、該ギヤ室１０４の外壁を耐圧構造とし
たり、図示せざる原動機からの駆動軸がギヤ室１０４の
外壁を貫通していることから、帰還流路１０９を介して
導入された混合ガスによりギヤ室１０４内の圧力が高ま
ると、この駆動軸とギヤ室１０４外壁との隙間から潤滑
油が漏れ出すおそれがあり、増速ギヤ（増速装置１０
３）の主軸部の軸封構造を耐圧構造としたりする必要が
あるなど多くの問題点がある。Further, the compressor 100 has a gear chamber 104.
Since the inside is kept at a high pressure by the high-pressure gas introduced from the oil separator, the outer wall of the gear chamber 104 has a pressure resistant structure, or a drive shaft from a motor (not shown) penetrates the outer wall of the gear chamber 104. Therefore, if the pressure in the gear chamber 104 increases due to the mixed gas introduced through the return flow passage 109, the lubricating oil may leak from the gap between the drive shaft and the outer wall of the gear chamber 104, and the speed increasing gear (Gearup device 10
There are many problems such as the need for a pressure-resistant structure for the shaft-sealing structure of the main shaft portion of 3).
【００１０】さらに、油分離器からギヤ室１０４内に高
圧の混合ガスを導入する帰還流路１０９を外部配管によ
って設けているため、この帰還流路１０９のための配管
スペースを確保する必要がある。Further, since the return passage 109 for introducing the high-pressure mixed gas from the oil separator into the gear chamber 104 is provided by the external pipe, it is necessary to secure a piping space for the return passage 109. .
【００１１】また、ロータ室１０２に対する潤滑油Ａの
導入は、吸入通路１０７の底部１０７’側より行われる
ため、ロータ室１０２の吸入通路１０７側上方の各摺動
部には十分に潤滑油が行きわたらないことが多い。した
がって、該摺動部の潤滑不良や吸入閉じ込み直後の作用
空間内の密封性が低下して圧縮機の性能低下（吸入効率
の低下）を招来する他、ひいては摺動部の焼付原因とな
る虞もある。Further, since the lubricating oil A is introduced into the rotor chamber 102 from the bottom portion 107 'side of the suction passage 107, the lubricating oil is sufficiently provided in each sliding portion above the suction passage 107 side of the rotor chamber 102. It often goes unnoticed. Therefore, poor lubrication of the sliding portion or deterioration of the sealing performance in the working space immediately after suction closing causes the performance of the compressor to deteriorate (reduction of suction efficiency), which in turn causes seizure of the sliding portion. There is a fear.
【００１２】この現象は、特に圧縮機本体の幅寸法を縮
小するためにおす・めすのスクリュロータを縦方向に積
み重ねるように配置した圧縮機のように歯車室の底部か
ら作用流体の吸込口までの距離が遠い圧縮機ほど顕著と
なる。This phenomenon occurs from the bottom of the gear chamber to the suction port of the working fluid, as in a compressor in which screw rotors of female and female are arranged vertically in order to reduce the width of the compressor body. The farther the compressor is, the more remarkable it becomes.
【００１３】以上のことから、本発明は前記増速装置１
０３の駆動・被駆動の各ギヤ１１０，１１１が潤滑油を
撹拌することにより生ずる動力ロスを減少することがで
き、しかもギヤ室１０４内の内圧を高めることにより高
圧ガスが吸入通路１０７に導入されることに伴う圧縮機
１００の比動力の低下や、軸封部からの油漏れを生じさ
せることなく、該ギヤ室１０４に給油された潤滑油を吸
入流路１０７、ひいてはロータ室１０２に導入すること
ができ、しかも、ロータ室内における潤滑・密封性能を
向上し、潤滑・密封不良などの諸問題点を解消した信頼
性の高い油冷式スクリュ圧縮機を提供することを目的と
する。From the above, the present invention provides the speed increasing device 1
The power loss caused by stirring the lubricating oil by the driving and driven gears 03 of No. 03 can be reduced, and high pressure gas is introduced into the suction passage 107 by increasing the internal pressure in the gear chamber 104. The lubricating oil supplied to the gear chamber 104 is introduced into the suction passage 107, and eventually the rotor chamber 102, without causing a decrease in the specific power of the compressor 100 and the occurrence of oil leakage from the shaft seal portion. It is an object of the present invention to provide a highly reliable oil-cooled screw compressor that can improve the lubrication / sealing performance in the rotor chamber and solves various problems such as poor lubrication / sealing.
【００１４】[0014]
【課題を解決するための手段】上記目的を達成するため
に、本発明の増速型油冷式スクリュ圧縮機は、おす・め
す一対のスクリュロータ７（７ａ，７ｂ）を備えた油冷
式の圧縮機本体１と、増速ギヤ（被駆動ギヤ１０，駆動
ギヤ１１）から成る増速装置２と、前記増速装置２の増
速ギヤ１０，１１に潤滑油を供給する、油噴射ノズル１
７等を備えた潤滑油の供給機構を備え、図示せざる回転
駆動源の回転速度を前記増速装置２により増速して前記
一対のスクリュロータ７（７ａ，７ｂ）を回転すると共
に、前記増速装置２に供給された潤滑油を前記圧縮機本
体１に導入可能とした増速型油冷式スクリュ圧縮機にお
いて、前記圧縮機本体１は、前記一対のスクリュロータ
７（７ａ，７ｂ）を収容するロータ室９と、前記一対の
スクリュロータ７（７ａ，７ｂ）の吸込み側端部におい
て前記ロータ室９と連続する吸入室１４が形成されたケ
ーシング６を備え、前記増速ギヤ１０，１１を収容する
ギヤ室３を前記吸入室１４に隣接して形成し、前記圧縮
機本体１にて圧縮される作用流体の吸込み口１３を、前
記ギヤ室３に連通して設けると共に、前記吸入室１４と
前記ギヤ室３間を仕切る隔壁２０に、前記ギヤ室３に導
入された潤滑油及び作用流体を前記圧縮機本体１の吸入
室１４に導入する開口（２７，２８）を設けたことを特
徴とする（請求項１）。In order to achieve the above object, the speed-increasing oil-cooled screw compressor of the present invention is an oil-cooled type equipped with a pair of male and female screw rotors 7 (7a, 7b). No. 1 compressor body 1, a speed increasing device 2 including a speed increasing gear (driven gear 10, drive gear 11), and an oil injection nozzle for supplying lubricating oil to the speed increasing gears 10 and 11 of the speed increasing device 2. 1
7, a rotation speed of a rotation drive source (not shown) is increased by the speed increasing device 2 to rotate the pair of screw rotors 7 (7a, 7b), and In a speed-increasing oil-cooled screw compressor capable of introducing the lubricating oil supplied to the speed increasing device 2 into the compressor body 1, the compressor body 1 includes the pair of screw rotors 7 (7a, 7b). And a casing 6 in which a suction chamber 14 continuous with the rotor chamber 9 is formed at the suction side end portions of the pair of screw rotors 7 (7a, 7b). A gear chamber 3 for housing 11 is formed adjacent to the suction chamber 14, and a suction port 13 for the working fluid compressed by the compressor body 1 is provided in communication with the gear chamber 3 and Between the chamber 14 and the gear chamber 3 The partition wall 20 to be cut is provided with openings (27, 28) for introducing the lubricating oil and the working fluid introduced into the gear chamber 3 into the suction chamber 14 of the compressor body 1 (claim 1). .
【００１５】前述の開口は、前記隔壁２０の下部を貫通
する連通穴２７と、前記連通穴２７の上方において前記
隔壁２０を貫通する連通口２８から成るものとしても良
い（請求項２）。The above-mentioned opening may include a communication hole 27 penetrating the lower part of the partition wall 20 and a communication port 28 penetrating the partition wall 20 above the communication hole 27 (claim 2).
【００１６】前記連通穴２７は、これを前記隔壁２０上
であって前記ロータ室９の下端よりも低い位置に設ける
ことが好ましく（請求項３）、また、前記増速ギヤ１
０，１１の外周における回転軌道下端よりも低い位置に
設けることが好ましい（請求項４）。The communication hole 27 is preferably provided on the partition wall 20 at a position lower than the lower end of the rotor chamber 9 (claim 3), and the speed increasing gear 1 is also provided.
It is preferable to provide it at a position lower than the lower end of the rotation track on the outer periphery of 0 and 11 (claim 4).
【００１７】以上の構成により、ギヤ室３内に給油され
た潤滑油は増速装置２の各ギヤ１０，１１の回転によっ
て拡散しミスト状となって隔壁２０に設けられた連通口
２８から作用流体と共に気液混合状態で吸入室１４内に
流入する。したがって、ロータ室９に対する潤滑油の導
入が均一に行われるため密封性が向上し圧縮機の比動力
が向上する他、ギヤ室３の底壁２５に潤滑油が過剰に滞
留することもないから増速ギヤ１０，１１が潤滑油を撹
拌することにより生じる動力ロスを可及的に減少でき
る。With the above construction, the lubricating oil supplied to the gear chamber 3 is diffused by the rotation of the gears 10 and 11 of the speed increasing device 2 to form a mist, which acts from the communication port 28 provided in the partition wall 20. It flows into the suction chamber 14 together with the fluid in a gas-liquid mixed state. Therefore, since the lubricating oil is uniformly introduced into the rotor chamber 9, the sealing performance is improved, the specific power of the compressor is improved, and the lubricating oil does not stay excessively on the bottom wall 25 of the gear chamber 3. The power loss caused by stirring the lubricating oil by the speed increasing gears 10 and 11 can be reduced as much as possible.
【００１８】また、ギヤ室３内を加圧することなく、吸
入室１４、ひいてはロータ室９に潤滑油を導入すること
ができることから、軸封部において潤滑油が漏れる等の
弊害をも好適に防止できる。Further, since the lubricating oil can be introduced into the suction chamber 14 and hence the rotor chamber 9 without pressurizing the inside of the gear chamber 3, it is possible to preferably prevent the harmful effects such as the leakage of the lubricating oil in the shaft sealing portion. it can.
【００１９】[0019]
【発明の実施の形態】以下、本発明の第１実施形態を図
１ないし図３により説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
【００２０】図１、図２において油冷式スクリュ圧縮機
本体１（以下圧縮機本体という）の一側には、フランジ
５が設けられており、このフランジ５を介して駆動ギヤ
１１及び被駆動ギヤ１０から成る増速装置２を収容する
ギヤ室３が一体的に連結されている。In FIGS. 1 and 2, a flange 5 is provided on one side of the oil-cooled screw compressor body 1 (hereinafter referred to as the compressor body), and the drive gear 11 and the driven gear are driven through this flange 5. A gear chamber 3 that houses a speed increasing device 2 including a gear 10 is integrally connected.
【００２１】そしてこのギヤ室３には、これと一体的に
形成されたハウジング４が連続して形成されており、こ
のハウジング４内において前述の駆動ギヤ１１に連結さ
れた回転軸が、図示せざる駆動原動機の駆動軸に連結さ
れている。A housing 4 integrally formed with the gear chamber 3 is continuously formed in the gear chamber 3, and the rotary shaft connected to the drive gear 11 is shown in the housing 4. It is connected to the drive shaft of the colander drive motor.
【００２２】圧縮機本体１のケーシング６内に形成され
たロータ室９内には、おす・めす一対のスクリュロータ
７（７ａ，７ｂ）を収納し、ロータ軸８の一方には増速
装置２の被駆動ギヤ１０を嵌入して該ギヤに駆動ギヤ１
１を噛合させている。A pair of male and female screw rotors 7 (7a, 7b) are housed in a rotor chamber 9 formed in a casing 6 of the compressor body 1, and one of the rotor shafts 8 has a speed increasing device 2 The driven gear 10 is inserted into the drive gear 1
1 is engaged.
【００２３】この駆動ギヤ１１の回転軸は、前述のよう
にハウジング４内において図示せざる駆動原動機の駆動
軸に連結されており、従って、駆動原動機を始動する
と、この駆動原動機の回転速度は増速装置２により増速
されてロータ軸８の一方に入力され、スクリュロータ７
がロータ室９内において回転する。The rotary shaft of the drive gear 11 is connected to the drive shaft of a drive prime mover (not shown) in the housing 4 as described above. Therefore, when the drive prime mover is started, the rotational speed of the drive prime mover increases. The speed is increased by the speed device 2 and input to one of the rotor shafts 8, and the screw rotor 7
Rotate in the rotor chamber 9.
【００２４】また、ギヤ室３上方の外壁１２にはスクリ
ュロータにより圧縮される作用流体を導入するための吸
込み口１３が開口しており、従ってその下側に相当する
ギヤ室３内の空間は、前記吸込み口１３を介して導入さ
れた作用流体をケーシング６内に形成された吸入室１４
に導入するための吸入路１５となっている。A suction port 13 for introducing a working fluid compressed by the screw rotor is opened in the outer wall 12 above the gear chamber 3, so that a space in the gear chamber 3 corresponding to the lower side thereof is formed. A suction chamber 14 in which the working fluid introduced through the suction port 13 is formed in the casing 6.
It is a suction passage 15 for introduction into.
【００２５】さらに、ギヤ室３の側壁１６には油噴射ノ
ズル１７が設けられ、給油配管１８を介して圧送された
潤滑油をこの油噴射ノズル１７より噴射して駆動ギヤ１
１及び被駆動ギヤ１０の噛合い部や、軸受部１９等の各
摺動部の潤滑が図られている。Further, an oil injection nozzle 17 is provided on the side wall 16 of the gear chamber 3, and the lubricating oil pumped through the oil supply pipe 18 is injected from this oil injection nozzle 17 to drive the drive gear 1
1 and the driven gear 10, and the sliding portions such as the bearing portion 19 are lubricated.
【００２６】この油噴射ノズル１７による潤滑油の噴射
は、一例として図示せざるセパレータレシーバタンク内
の圧力を利用して行うことができ、例えばセパレータレ
シーバタンクにおいて気液分離された潤滑油をこのタン
ク内の圧力により圧送して行うものとしても良い。The injection of the lubricating oil by the oil injection nozzle 17 can be performed by utilizing the pressure in the separator receiver tank (not shown) as an example. For example, the lubricating oil separated in the separator receiver tank can be used as the lubricating oil. It may be carried out by pressure feeding by the internal pressure.
【００２７】もっとも、本発明のスクリュ圧縮機の構成
はこれに限定されず、例えば別途給油ポンプを設け、こ
の給油ポンプにより潤滑油を給油する構成としても良
い。However, the structure of the screw compressor of the present invention is not limited to this, and for example, a separate oil supply pump may be provided and lubricating oil may be supplied by this oil supply pump.
【００２８】スクリュロータ７を収納するロータ室９が
内部に形成された圧縮機本体１のケーシング６は、ギヤ
室３と吸入室１４との間を隔壁２０によって仕切られて
いる。The casing 6 of the compressor body 1 having the rotor chamber 9 for accommodating the screw rotor 7 formed therein is partitioned by a partition wall 20 between the gear chamber 3 and the suction chamber 14.
【００２９】この隔壁２０には、スクリュロータ７なら
びに増速装置２の各ギヤを支承する軸受箱２１が設けら
れていると共に、隔壁２０の下方には、ギヤ室３の底壁
２５近傍と、ケーシング６の吸入室１４の底部２６近傍
との間を連通する連通穴２７が開口し、この連通穴２７
が増速装置２の摺動各部を潤滑後流下した潤滑油を吸入
室１４に導入するための流路となっている。This partition wall 20 is provided with a bearing box 21 for supporting the screw rotor 7 and each gear of the speed increasing device 2, and below the partition wall 20, near the bottom wall 25 of the gear chamber 3, A communication hole 27 that communicates with the vicinity of the bottom portion 26 of the suction chamber 14 of the casing 6 is opened, and the communication hole 27
Is a flow path for introducing the lubricating oil that has flowed down after lubricating each sliding portion of the speed increasing device 2 into the suction chamber 14.
【００３０】さらに、前記隔壁２０の軸受箱２１の外周
部には複数箇所にわたって作用流体の吸入路となる連通
口２８が形成され、それぞれはケーシング６の吸入室１
４と連通している。Further, a communication port 28 serving as a suction passage for the working fluid is formed in a plurality of locations on the outer peripheral portion of the bearing box 21 of the partition wall 20, each of which is a suction chamber 1 of the casing 6.
It communicates with 4.
【００３１】前記ロータ室９内に収納されているスクリ
ュロータ７は、本実施形態においてはその軸心Ｑを並列
配置しておす・めすロータ７ａ，７ｂを、上下略縦方向
に積み重ねるように組み立てられている。In the present embodiment, the screw rotor 7 housed in the rotor chamber 9 is assembled so that the axial centers Q thereof are arranged in parallel and the female rotors 7a and 7b are vertically stacked in a substantially vertical direction. Has been.
【００３２】そして、スクリュロータ７のもう一方の端
部には圧縮された作用流体の吐出口３１（図２中左）が
形成されていると共に、スクリュロータ７の吐出側軸受
装置３２が配置されている。A discharge port 31 (left in FIG. 2) for the compressed working fluid is formed at the other end of the screw rotor 7, and a discharge side bearing device 32 of the screw rotor 7 is arranged. ing.
【００３３】図３は、ケーシング６とギヤ室３との接合
部を隔壁２０の一側に沿って軸直角方向に切断して圧縮
機本体１側を見たときの断面（図１中Ｇ−Ｇ線断面）
で、隔壁２０に設けられた開口、本実施形態にあっては
連通穴２７及び連通口２８それぞれの位置関係を示して
いる。FIG. 3 is a cross-sectional view of the joint portion between the casing 6 and the gear chamber 3 cut along the one side of the partition wall 20 in the direction perpendicular to the axis to see the compressor body 1 side (G- in FIG. 1). (G line cross section)
The positional relationship between the openings provided in the partition wall 20, the communication hole 27 and the communication port 28 in this embodiment is shown.
【００３４】なお、図１のＧ−Ｇ線断面である図３にお
いては本来被駆動ギヤ１０は図面上に現れないものであ
るが、各部の位置関係を説明する便宜上、図３中に被駆
動ギヤ１０の位置を示している。In FIG. 3, which is a sectional view taken along the line GG in FIG. 1, the driven gear 10 is not originally shown in the drawing, but for convenience of explaining the positional relationship of each part, the driven gear 10 is shown in FIG. The position of the gear 10 is shown.
【００３５】前記連通穴２７は図３におてスクリュロー
タ７の外周最下端及び被駆動ギヤ１０の外周最下端部の
いずれよりも下側に位置して形成されており、隔壁２０
に設けられたフランジ５の下方内周縁近傍で、かつギヤ
室３の底壁２５近傍に開口し、その反対側の開口端はケ
ーシング６の吸入室１４の底部近傍に位置して開口して
いる（図１）。The communication hole 27 is formed at a position lower than both the outermost lower end of the screw rotor 7 and the outermost lower end of the driven gear 10 in FIG.
The flange 5 is provided near the lower inner peripheral edge of the flange 5 and near the bottom wall 25 of the gear chamber 3, and the opening end on the opposite side is located near the bottom of the suction chamber 14 of the casing 6. (Figure 1).
【００３６】吸入室１４の輪郭線、すなわち圧縮機本体
１のケーシング６内壁面は、フランジ５の形成位置にお
けるスクリュロータ７の軸心Ｑに直交方向を成す断面に
おいてスクリュロータ７の外周ならびに軸受箱２１の外
周部を略囲繞する形状を成し、隔壁２０から離間するに
従い前記軸心Ｑに直交方向を成す断面形状を徐々に縮小
変化し、おす・めすのスクリュロータ７（７ａ，７ｂ）
が互いに噛合って吸入空間を最大にして閉じこむ位置に
おいて、スクリュロータ７の外形形状と略同一形状とな
り、この位置を境にロータ室９の内壁と成る。The contour line of the suction chamber 14, that is, the inner wall surface of the casing 6 of the compressor main body 1 is the outer periphery of the screw rotor 7 and the bearing box in a cross section perpendicular to the axis Q of the screw rotor 7 at the position where the flange 5 is formed. 21. The screw rotor 7 (7a, 7b) of the male / female type has a shape that substantially surrounds the outer peripheral portion of 21, and gradually reduces the cross-sectional shape that is orthogonal to the axis Q as it is separated from the partition wall 20.
Have a shape substantially the same as the outer shape of the screw rotor 7 at a position where they mesh with each other and close the suction space to the maximum, and form the inner wall of the rotor chamber 9 at this position.
【００３７】作用流体の連通口２８は、隔壁２０に設け
られた軸受箱２１と重ならない所定の位置に形成されて
おり、本実施形態にあっては被駆動ギヤ１０及び駆動ギ
ヤ１１の外周方向にその内端縁２８ａを配置すると共
に、軸受箱２１の外周部近傍でかつ隔壁２０のフランジ
内周縁５ａ近傍に外端縁２８ｂを配置して形成されてい
る。The working fluid communication port 28 is formed at a predetermined position so as not to overlap the bearing box 21 provided in the partition wall 20, and in the present embodiment, the driven gear 10 and the drive gear 11 are in the outer peripheral direction. Is formed by arranging the inner end edge 28a thereof and the outer end edge 28b near the outer peripheral portion of the bearing box 21 and near the flange inner peripheral edge 5a of the partition wall 20.
【００３８】このように形成された連通穴２７ならびに
連通口２８は、その形成位置が図３に示すようにスクリ
ュロータ７の外周形状や駆動ギヤ１１及び被駆動ギヤ１
０の外周形状とは重ならない位置となることから、連通
口２８及び連通穴２７を介して吸入路１５から吸入室１
４に導入される作用流体や潤滑油の移動が妨げられるこ
とがない。The communication hole 27 and the communication port 28 formed in this way are formed at the outer peripheral shape of the screw rotor 7, the driving gear 11 and the driven gear 1 as shown in FIG.
Since it does not overlap with the outer peripheral shape of 0, the suction chamber 1 is sucked from the suction passage 15 through the communication port 28 and the communication hole 27.
There is no obstruction to the movement of the working fluid or the lubricating oil introduced into No. 4.
【００３９】なお、連通穴２７は主にギヤ室３の底部に
溜まった潤滑油を吸入室１４に導入するように構成する
が、連通穴２７を大きく開口し連通穴２７を介してギヤ
室３から吸入室１４へ作用流体を吸入可能に構成するこ
ともでき、例えば図３に示す例における連通穴２７と、
これに隣接するは連通口２８とを連続して形成したもの
としても良い。The communication hole 27 is mainly configured to introduce the lubricating oil accumulated in the bottom portion of the gear chamber 3 into the suction chamber 14, but the communication hole 27 is largely opened and the gear chamber 3 is opened through the communication hole 27. The working fluid can be sucked from the suction chamber 14 into the suction chamber 14, for example, the communication hole 27 in the example shown in FIG.
Adjacent to this, the communication port 28 may be formed continuously.
【００４０】また、連通口２８は、隔壁２０上において
吸入路１５と吸入室１４とを連通する位置であればその
形成位置は特に限定されず、また、その形状、形成個数
等についても図３に示す実施形態に限定されるものでは
ない。The formation position of the communication port 28 is not particularly limited as long as it is a position where the suction passage 15 and the suction chamber 14 are communicated with each other on the partition wall 20, and the shape, the number of formation, and the like of FIG. It is not limited to the embodiment shown in FIG.
【００４１】もっとも、この連通口２８は吸込み口１３
を介して吸入路１５に導入された作用流体を吸入室１４
に導入するためのものであることから、その開口面積の
総和は、作用流体を抵抗なく通過させるに十分なものと
することが好ましい。However, this communication port 28 is the suction port 13
The working fluid introduced into the suction passage 15 via the suction chamber 14
Therefore, it is preferable that the total sum of the opening areas is sufficient to allow the working fluid to pass without resistance.
【００４２】次いで作用について説明する。まず、図示
しない駆動原動機を始動して増速装置２を介した動力伝
達により圧縮機本体１のスクリュロータ７が回転する
と、吸入された作用流体はギヤ室３内に連通する吸込み
口１３を介して吸入負圧により吸い込まれ、吸入路１
５，連通口２８を介してケーシングの吸入室１４内に流
入する。Next, the operation will be described. First, when a screw motor 7 of the compressor body 1 is rotated by power transmission via the speed increasing device 2 by starting a drive motor (not shown), the sucked working fluid is passed through the suction port 13 communicating with the gear chamber 3. Is sucked by negative suction pressure, and suction path 1
5, it flows into the suction chamber 14 of the casing through the communication port 28.
【００４３】このとき、ギヤ室の側壁１６に設けられた
油噴射ノズル１７（図２）からは、例えばセパレータレ
シーバタンク（図示せず）内の圧力により圧送された潤
滑油が増速装置２を成す駆動ギヤ１１及び被駆動ギヤ１
０の噛合い部に勢いよく噴射される。At this time, the lubricating oil pressure-fed by, for example, the pressure in the separator receiver tank (not shown) from the oil injection nozzle 17 (FIG. 2) provided on the side wall 16 of the gear chamber moves to the speed increasing device 2. Drive gear 11 and driven gear 1
It is jetted vigorously to the meshing part of 0.
【００４４】噴射された潤滑油は、回転する駆動ギヤ１
１及び被駆動ギヤ１０によってギヤ室３内の各摺動部に
飛散して各部を潤滑した後、大粒の油滴は自重により下
方に流下して、ギヤ室３の底壁２５上に溜まる。そし
て、ここに溜まった潤滑油は連通穴２７からスクリュロ
ータ７の回転に伴う吸入負圧によって吸入室１４内に導
入され、連通穴２７近傍に位置するスクリュロータ７の
吸入作用空間の摺動面及び噛合い部を潤滑・密封しなが
ら圧縮作用空間へ移動し、定格圧力まで圧縮された作用
流体と共に吐出口３１を介して圧縮機本体１外に吐出さ
れる。The injected lubricating oil is rotated by the driving gear 1
1 and the driven gear 10 scatter to each sliding portion in the gear chamber 3 to lubricate each portion, and then large-sized oil droplets flow downward due to their own weight and collect on the bottom wall 25 of the gear chamber 3. The lubricating oil collected here is introduced from the communication hole 27 into the suction chamber 14 by the suction negative pressure accompanying the rotation of the screw rotor 7, and the sliding surface of the suction action space of the screw rotor 7 located near the communication hole 27. Also, the meshing portion is moved to the compression working space while being lubricated and sealed, and is discharged to the outside of the compressor body 1 through the discharge port 31 together with the working fluid compressed to the rated pressure.
【００４５】このようにして圧縮機本体１外に吐出され
た作用流体は、その後、例えば図示せざるセパレータレ
シーバタンク内に導入されて貯溜されると共に、この作
用流体中に含まれる油分がセパレータレシーバタンク内
において分離される。この油分の分離された作用流体
は、例えば消費側に供給され、セパレータレシーバタン
クにおいて回収された潤滑油は、セパレータレシーバタ
ンク内の圧力により給油配管１８内を圧送されて、前述
の油噴射ノズル１７より噴射される。The working fluid thus discharged to the outside of the compressor body 1 is then introduced into, for example, a separator receiver tank (not shown) and stored therein, and the oil contained in this working fluid is separated into the separator receiver tank. Separated in the tank. The working fluid separated from the oil is supplied to, for example, the consumer side, and the lubricating oil collected in the separator receiver tank is pressure-fed in the oil supply pipe 18 by the pressure in the separator receiver tank to cause the oil injection nozzle 17 described above. Is more jetted.
【００４６】一方、増速装置２の回転によって飛散した
微小な油滴は、ギヤ室３内の作用流体中にミスト状(霧
状)となって浮遊すると共に、吸込み口１３から吸入さ
れた作用流体と混合して気液混合状態となって吸入室１
４内に流入する。On the other hand, the minute oil droplets scattered by the rotation of the speed increasing device 2 float in the working fluid in the gear chamber 3 in the form of mist (fog) and are sucked from the suction port 13. The suction chamber 1 becomes a gas-liquid mixed state by mixing with a fluid.
It flows into 4.
【００４７】該スクリュロータ７の吸入側端面（図中右
側）は吸入室１４に面しており、したがって前記連通口
２８を介して流入した作用流体は、スクリュロータ７の
吸入側端面を囲繞するように形成された吸入室１４の内
壁に沿って吸入されることとなり、該吸入室１４内に流
入した気液混合状態の作用流体によっておす・めすスク
リュロータ７の噛合い部に形成される作用空間内の潤滑
と密封を同時に行う。そのため、該部の密封性が向上し
圧縮機の比動力が向上する。The suction side end surface (right side in the figure) of the screw rotor 7 faces the suction chamber 14, so that the working fluid flowing in through the communication port 28 surrounds the suction side end surface of the screw rotor 7. Suction is performed along the inner wall of the suction chamber 14 formed as described above, and the action formed in the meshing portion of the male / female screw rotor 7 by the working fluid in a gas-liquid mixed state that has flowed into the suction chamber 14. Lubricate and seal the space at the same time. Therefore, the sealing property of the portion is improved and the specific power of the compressor is improved.
【００４８】他方、ギヤ室３の底壁２５に流下した潤滑
油も前記吸入室１４内の負圧による圧力差によりほぼ連
続的に回収されるから、前記底壁２５に滞留した潤滑油
は、この部分に過剰に溜まる前に連通穴２７を介して吸
入室１４に導入される。On the other hand, since the lubricating oil that has flowed down to the bottom wall 25 of the gear chamber 3 is also recovered almost continuously due to the pressure difference due to the negative pressure in the suction chamber 14, the lubricating oil that has accumulated in the bottom wall 25 is Before being excessively accumulated in this portion, it is introduced into the suction chamber 14 through the communication hole 27.
【００４９】したがって、従来技術において説明したよ
うに、被駆動ギヤ１０や駆動ギヤ１１が過剰に滞留した
潤滑油を撹拌することにより生じる消費動力ロスも減少
することができる。Therefore, as described in the prior art, it is possible to reduce the power consumption loss caused by stirring the lubricating oil that has accumulated excessively in the driven gear 10 and the driving gear 11.
【００５０】併せて、潤滑油は、ギヤ室３に内蔵する増
速ギヤ装置２の駆動原動機側（図中右側）の軸受部に対
しても飛散して、該部を程よく潤滑する。At the same time, the lubricating oil also scatters on the bearing portion on the drive prime mover side (right side in the figure) of the speed increasing gear device 2 contained in the gear chamber 3 and lubricates the portion appropriately.
【００５１】また、吸入室１４に対する潤滑油の導入
は、ギヤ室３内を加圧することなく行うことができるこ
とから、例えば軸受部１９等を介して潤滑油がハウジン
グ４側に漏出する等の不都合をも防止することができ
る。Further, since the lubricating oil can be introduced into the suction chamber 14 without pressurizing the inside of the gear chamber 3, for example, the lubricating oil leaks to the housing 4 side via the bearing portion 19 or the like. Can also be prevented.
【００５２】さらに、ギヤ室の底部と吸入通路の底部と
を排出管で連通する従来のスクリュ圧縮機の構造とは異
なり、隔壁２０に形成した連通穴２７を介して潤滑油を
吸入室１４に導入することができることから、圧縮機本
体１の下部に排出管が突出して圧縮機本体１が大型化す
ることなく、配置スペースの減少を図ることができる。Further, unlike the structure of the conventional screw compressor in which the bottom of the gear chamber and the bottom of the suction passage are communicated with each other by the discharge pipe, the lubricating oil is introduced into the suction chamber 14 through the communication hole 27 formed in the partition wall 20. Since it can be introduced, the discharge pipe does not project to the lower part of the compressor main body 1 and the compressor main body 1 does not become large in size, and the arrangement space can be reduced.
【００５３】図４，図５は本発明の第２実施形態で、お
す・めすスクリュロータ７ａ，７ｂを水平方向に、また
増速装置２の被駆動ギヤ１０，駆動ギヤ１１も同様に水
平方向にそれぞれ配置した実施形態で、前述の第１実施
形態に対してギヤ室３の外壁１２に装着した油噴射ノズ
ル１７を該ケースの上方に、また圧縮作用流体の吐出口
３１を圧縮機本体１の下方に設けた以外は、ほぼ第１実
施形態と同構造である。従って、増速装置２に供給され
た潤滑油ならびに作用流体の作用、効果も前述第１実施
形態とほぼ同じであるので以下の説明を省略する。4 and 5 show a second embodiment of the present invention in which the male / female screw rotors 7a and 7b are arranged in the horizontal direction, and the driven gear 10 and the drive gear 11 of the speed increasing device 2 are also arranged in the horizontal direction. In each of the above embodiments, the oil injection nozzle 17 mounted on the outer wall 12 of the gear chamber 3 is provided above the case and the discharge port 31 of the compressed working fluid is provided in the compressor body 1 as compared with the first embodiment. The structure is almost the same as that of the first embodiment except that it is provided below. Therefore, the actions and effects of the lubricating oil and the working fluid supplied to the speed increasing device 2 are substantially the same as those in the first embodiment, and therefore the following description will be omitted.
【００５４】図６，図７は本発明の第３実施形態で、お
す・めすスクリュロータ７ａ，７ｂを水平方向に、また
増速装置の被駆動ギヤ１０，駆動ギヤ１１を略垂直方向
にそれぞれ配置した実施形態で、前述の第２実施形態の
スクリュ圧縮機と同様に第１実施形態のスクリュ圧縮機
に対してギヤ室３の外壁１２に装着の油噴射ノズル１７
を該ケースの略側方に、また圧縮作用流体の吐出口３１
を圧縮機本体１の下方に設けた以外はほぼ第１実施形態
と同構造である。従って、第３実施形態のスクリュ圧縮
機による供給潤滑油ならびに吸入作用流体の作用・効果
も同様に前述第１実施形態と同じであるので以下の説明
を省略する。6 and 7 show a third embodiment of the present invention in which the male / female screw rotors 7a and 7b are horizontally oriented, and the driven gear 10 and the drive gear 11 of the speed increasing device are generally vertically oriented. In the arranged embodiment, the oil injection nozzle 17 mounted on the outer wall 12 of the gear chamber 3 with respect to the screw compressor of the first embodiment is similar to the screw compressor of the second embodiment described above.
To the side of the case, and the discharge port 31 for the compressed working fluid.
The structure is almost the same as that of the first embodiment except that is provided below the compressor body 1. Therefore, the operation and effect of the lubricating oil supplied and the suction working fluid by the screw compressor of the third embodiment are also the same as those of the first embodiment, and therefore the following description will be omitted.
【００５５】[0055]
【発明の効果】以上説明した本発明の構成により、ギヤ
室内に給油された潤滑油を増速装置の各ギヤの回転によ
って拡散してミスト状にして隔壁に設けられた連通口か
ら吸入空気と共に気液混合状態で吸入室内に流入するた
め、ギヤ室内を加圧することなく、しかも圧縮機本体外
に突出する特別な配管等を設けていないコンパクトな形
状でありながら、ロータ室に対する潤滑油の導入が均一
に行われ、密封性が向上し圧縮機の比動力が向上する
他、ギヤ室底壁に潤滑油が過剰に滞留することもないか
ら増速ギヤの潤滑油撹拌に伴う動力ロスを可及的に減少
することができるスクリュ圧縮機を提供することができ
た。With the configuration of the present invention described above, the lubricating oil fed into the gear chamber is diffused by the rotation of the gears of the speed increasing device to form a mist, and the intake air is supplied from the communication port provided in the partition wall. Since it flows into the suction chamber in a gas-liquid mixed state, it does not pressurize the gear chamber, and it has a compact shape with no special piping protruding outside the compressor body, but introduces lubricating oil into the rotor chamber. Is performed uniformly, the sealing performance is improved, the specific power of the compressor is improved, and the lubricating oil does not stay excessively on the bottom wall of the gear chamber.Therefore, power loss due to agitation of lubricating oil in the speed increasing gear is possible. It was possible to provide a screw compressor that can be reduced as much as possible.
【００５６】しかも、前述のようにギヤ室内を加圧する
ことなく、ロータ室に潤滑油を導入することができるこ
とから、軸封部において潤滑油が漏れる等の弊害をも好
適に防止でき、しかも、高圧ガスが吸入通路に導入され
ることによる作用流体の吸入量の低下に伴う比動力の低
下を防止できる等、信頼性の高い油冷式スクリュ圧縮機
を提供することができた。Moreover, since the lubricating oil can be introduced into the rotor chamber without pressurizing the gear chamber as described above, it is possible to suitably prevent the harmful effects such as the leakage of the lubricating oil in the shaft sealing portion. It was possible to provide a highly reliable oil-cooled screw compressor in which it is possible to prevent a decrease in specific power due to a decrease in the intake amount of the working fluid due to the introduction of high-pressure gas into the intake passage.
【図１】本発明油冷式スクリュ圧縮機本体の縦断面図で
ある。FIG. 1 is a vertical cross-sectional view of an oil-cooled screw compressor body of the present invention.
【図２】図１の圧縮機本体の平面図である2 is a plan view of the compressor body of FIG. 1. FIG.
【図３】隔壁を軸直角方向にみたときの説明図である。FIG. 3 is an explanatory diagram when a partition wall is viewed in a direction perpendicular to an axis.
【図４】第２実施形態における縦断面図である。FIG. 4 is a vertical sectional view according to a second embodiment.
【図５】第２実施形態における隔壁の説明図である。FIG. 5 is an explanatory diagram of partition walls in the second embodiment.
【図６】第３実施形態における縦断面図である。FIG. 6 is a vertical sectional view according to a third embodiment.
【図７】第３実施形態における隔壁の説明図である。FIG. 7 is an explanatory diagram of partition walls in the third embodiment.
【図８】従来の油冷式スクリュ圧縮機の概略図である。FIG. 8 is a schematic diagram of a conventional oil-cooled screw compressor.
１ 圧縮機本体 ２ 増速装置 ３ ギヤ室 ４ ハウジング ５ フランジ ５ａ フランジ内端縁 ６ ケーシング ７，７ａ，７ｂ スクリュロータ ８ ロータ軸 ９ ロータ室 １０ 被駆動ギヤ １１ 駆動ギヤ １３ 吸込み口 １４ 吸入室 １５ 吸入路 １６ ギヤ室の側壁 １７ 油噴射ノズル １８ 給油配管 １９ 軸受部 ２０ 隔壁 ２１ 軸受箱 ２５ 底壁 ２６ 底部（吸入室の） ２７ 連通穴 ２８ 連通口 ３２ 軸受装置 １００ 圧縮機 １０１ スクリュロータ １０２ ロータ室 １０３ 増速装置 １０４ ギヤ室 １０５ 隔壁 １０６ 排出管 １０７ 吸入通路 １０７’ 底部（吸入通路の） １０８ 上部空間 １０９ 帰還流路 １１０ 被駆動ギヤ １１１ 駆動ギヤ １１３ 噴射ノズル １１６ ケーシング １１７ 吐出通路 1 Compressor body 2 speed increasing device 3 gear chamber 4 housing 5 flange 5a Inner edge of flange 6 casing 7,7a, 7b Screw rotor 8 rotor shaft 9 rotor room 10 Driven gear 11 drive gear 13 Suction port 14 Inhalation chamber 15 Inhalation route 16 Side wall of gear chamber 17 Oil injection nozzle 18 Oil supply piping 19 Bearing part 20 partitions 21 bearing box 25 bottom wall 26 Bottom (in the suction chamber) 27 communication hole 28 communication port 32 bearing device 100 compressor 101 screw rotor 102 rotor room 103 Speed increasing device 104 gear chamber 105 partition 106 discharge pipe 107 Inhalation passage 107 'bottom (in the intake passage) 108 Upper space 109 Return flow path 110 driven gear 111 drive gear 113 injection nozzle 116 casing 117 Discharge passage
Claims (4)
た油冷式の圧縮機本体と、増速ギヤから成る増速装置
と、前記増速装置の増速ギヤに潤滑油を供給する潤滑油
の供給機構を備え、回転駆動源の回転速度を前記増速装
置により増速して前記一対のスクリュロータを回転する
と共に、前記増速装置に供給された潤滑油を前記圧縮機
本体に導入可能とした増速型油冷式スクリュ圧縮機にお
いて、 前記圧縮機本体は、前記一対のスクリュロータを収容す
るロータ室と、前記一対のスクリュロータの吸込み側端
部において前記ロータ室と連続する吸入室が形成された
ケーシングを備え、 前記増速ギヤを収容するギヤ室を前記吸入室に隣接して
形成し、前記圧縮機本体にて圧縮される作用流体の吸込
み口を、前記ギヤ室に連通して設けると共に、 前記吸入室と前記ギヤ室間を仕切る隔壁に、前記ギヤ室
に導入された潤滑油及び作用流体を前記圧縮機本体の吸
入室に導入する開口を設けたことを特徴とする増速型油
冷式スクリュ圧縮機。Claim: What is claimed is: 1. An oil-cooled compressor body having a pair of male and female screw rotors, a speed increasing device including a speed increasing gear, and lubricating oil for supplying lubricating oil to the speed increasing gear of the speed increasing device. The rotation speed of the rotary drive source is increased by the speed increasing device to rotate the pair of screw rotors, and the lubricating oil supplied to the speed increasing device can be introduced into the compressor body. In the speed-increasing oil-cooled screw compressor, the compressor main body includes a rotor chamber that accommodates the pair of screw rotors, and a suction chamber that is continuous with the rotor chamber at suction-side end portions of the pair of screw rotors. A casing in which the speed increasing gear is housed is formed adjacent to the suction chamber, and a suction port for a working fluid compressed by the compressor body is communicated with the gear chamber. With the A speed-increasing oil cooling system, characterized in that a partition wall separating the suction chamber and the gear chamber is provided with an opening for introducing the lubricating oil and the working fluid introduced into the gear chamber into the suction chamber of the compressor body. Type screw compressor.
連通穴と、前記連通穴の上方において前記隔壁を貫通す
る連通口から成ることを特徴とする請求項１記載の増速
型油冷式スクリュ圧縮機。2. The speed-increasing oil cooling system according to claim 1, wherein the opening comprises a communication hole penetrating a lower portion of the partition wall and a communication port penetrating the partition wall above the communication hole. Type screw compressor.
ロータ室の下端よりも低い位置に設けた請求項２記載の
増速型油冷式スクリュ圧縮機。3. The speed-increasing oil-cooled screw compressor according to claim 2, wherein the communication hole is provided at a position on the partition wall and lower than a lower end of the rotor chamber.
増速ギヤの外周における回転軌道下端よりも低い位置に
設けた請求項２又は３記載の増速型油冷スクリュ圧縮
機。4. The speed-increasing oil-cooled screw compressor according to claim 2 or 3, wherein the communication hole is provided on the partition wall and at a position lower than a lower end of a rotation track on an outer periphery of the speed-increasing gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002080743A JP2003278674A (en) | 2002-03-22 | 2002-03-22 | Oil-cooled screw compressor of speed increasing type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002080743A JP2003278674A (en) | 2002-03-22 | 2002-03-22 | Oil-cooled screw compressor of speed increasing type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003278674A true JP2003278674A (en) | 2003-10-02 |
Family
ID=29229653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002080743A Pending JP2003278674A (en) | 2002-03-22 | 2002-03-22 | Oil-cooled screw compressor of speed increasing type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003278674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443146A (en) * | 2018-05-24 | 2018-08-24 | 上海维尔泰克螺杆机械有限公司 | A kind of two-stage helical-lobe compressor of band grade room machine mixer |
-
2002
- 2002-03-22 JP JP2002080743A patent/JP2003278674A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443146A (en) * | 2018-05-24 | 2018-08-24 | 上海维尔泰克螺杆机械有限公司 | A kind of two-stage helical-lobe compressor of band grade room machine mixer |
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