JP2550802Y2 - Rotor for screw compressor - Google Patents
Rotor for screw compressorInfo
- Publication number
- JP2550802Y2 JP2550802Y2 JP1989100544U JP10054489U JP2550802Y2 JP 2550802 Y2 JP2550802 Y2 JP 2550802Y2 JP 1989100544 U JP1989100544 U JP 1989100544U JP 10054489 U JP10054489 U JP 10054489U JP 2550802 Y2 JP2550802 Y2 JP 2550802Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- rotor body
- recess
- rotor
- screw compressor
- 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 - Fee Related
Links
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は２つのロータ間の空間に押し込んだ気体を圧
縮し加圧して吐出するスクリュー圧縮機における上記ロ
ータの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement of the above-described rotor in a screw compressor that compresses, pressurizes, and discharges gas pushed into a space between two rotors.
［従来の技術］ スクリュー圧縮機は、その一例を第４図に示す如く、
ケーシング１内に２つのロータ２を並列に配置して各ロ
ータ２における軸３の両端部を軸受４にそれぞれ支持さ
せ、且つ上記軸３に回転動力を伝えることにより、２つ
のロータ２を回転させて軸方向一端部の入口５から取り
入れた空気を圧縮して軸方向他端部の出口６より吐出さ
せるようにしてある。[Prior Art] As shown in FIG. 4, an example of a screw compressor is as follows.
The two rotors 2 are rotated in parallel by arranging two rotors 2 in parallel in the casing 1 and supporting both ends of the shafts 3 of the respective rotors 2 with the bearings 4 and transmitting rotational power to the shafts 3. The air taken in from the inlet 5 at one axial end is compressed and discharged from the outlet 6 at the other axial end.
上記スクリュー圧縮機で使用されるロータ２として
は、従来、ロータ胴と軸とを鉄系金属にて一体に成形し
た、いわゆる、鉄系一体ロータとしたものがあるが、該
鉄系一体ロータは大重量であるため、最近、第５図に示
す如く、ロータ胴2aと軸３とを別体としてロータ胴2aを
非鉄金属製とし、且つロータ胴2aを軸３に焼き嵌めする
と共にピン７を用いて固定したものが採用されている。As the rotor 2 used in the screw compressor, conventionally, there is a so-called iron-based integrated rotor in which a rotor body and a shaft are integrally formed of an iron-based metal. Due to its heavy weight, recently, as shown in FIG. 5, the rotor body 2a and the shaft 3 are separated from each other, and the rotor body 2a is made of a non-ferrous metal. What was fixed using is adopted.
［考案が解決しようとする課題］ ところが、上記第５図に示すロータ２の場合には、ロ
ータ胴2aを非鉄金属製としたため軽量ではあるが、ロー
タ胴2aに作用するスラストとトルクを上記焼き嵌めとピ
ン７により受ける構造であるため、特に、ロータ胴2aの
熱膨張時にピン７に無理な力が掛かる問題がある。すな
わち、スクリュー圧縮機が、たとえば、高圧力比圧縮機
である場合、取り込まれる空気の温度より圧縮されて吐
出される空気の温度の方が高温になるため、第５図に示
すロータ２では、熱膨張により、焼き嵌めしたロータ胴
2aと軸３との間に軸方向の伸び差が発生し、この伸び差
がロータ胴2aと軸３との間を連結するピン７に集中して
無理な力が掛かる問題がある。また、ピン７を打ち込む
ためには、ロータ胴2aを軸３に焼き嵌めした後にピン穴
を加工せねばならず、更に、回転中にピン７が抜けない
ようにするためには、ピン穴を精度よく加工する必要が
あり、製作作業が大変であった。[Problem to be Solved by the Invention] However, in the case of the rotor 2 shown in FIG. 5, although the rotor body 2a is made of non-ferrous metal, it is lightweight, but the thrust and torque acting on the rotor body 2a are reduced by the above-described firing. Due to the structure that is fitted and received by the pin 7, there is a problem that an excessive force is applied to the pin 7 particularly when the rotor body 2a thermally expands. That is, when the screw compressor is, for example, a high-pressure ratio compressor, the temperature of the compressed and discharged air is higher than the temperature of the taken-in air. Therefore, in the rotor 2 shown in FIG. Rotor body shrink-fitted by thermal expansion
There is a problem that an axial expansion difference is generated between the shaft 2a and the shaft 3, and the expansion difference is concentrated on the pin 7 connecting the rotor body 2a and the shaft 3, and an excessive force is applied. Further, in order to drive the pin 7, a pin hole must be formed after the rotor body 2 a is shrink-fitted to the shaft 3. Further, in order to prevent the pin 7 from coming off during rotation, the pin hole must be formed. It was necessary to process with high precision, and the production work was difficult.
そこで、本考案は、ロータ胴を軸に確実に固定できる
ようにすると共に容易に製作することができるようにし
ようとするものである。Therefore, the present invention is to make it possible to securely fix the rotor body to the shaft and to make it easy to manufacture.
［課題を解決するための手段］ 本考案は、上記課題を解決するために、軸の表面部
に、円周方向に延びるリング状の突起または凹みを１個
所だけ設けると共に、上記軸の表面部に、上記円周方向
の突起または凹みと直角に軸方向へ延びる突起または凹
みを１個所だけ設け、且つ該突起または凹みを設けた軸
上に、該軸と異なる材質のロータ胴を鋳込み製作または
射出成形することにより、上記軸とロータ胴とを固定し
てなる構成とする。Means for Solving the Problems According to the present invention, in order to solve the above-mentioned problems, a single ring-shaped protrusion or recess extending in the circumferential direction is provided on the surface of the shaft, and the surface of the shaft is provided. A single protrusion or recess extending in the axial direction perpendicular to the circumferential protrusion or recess, and casting a rotor body of a material different from the shaft on the shaft provided with the protrusion or recess. The shaft and the rotor body are fixed by injection molding.
又、軸の表面部に、円周方向に延びるリング状の凹み
を１個所だけ設けると共に、該凹みの途中に部分的な突
起を１個所だけ設けた構成としてもよい。In addition, a configuration may be adopted in which only one ring-shaped recess extending in the circumferential direction is provided on the surface of the shaft, and only one partial projection is provided in the middle of the recess.
［作用］ 軸の表面部に突起または凹みを設けて、その外側に、
該軸と異なる材質のロータ胴を鋳込み製作または射出成
形により固定すると、製作作業が容易となると共に、軸
とロータ胴の固定が確実に行われることになり、上記軸
表面の突起または凹みによりトルク及びスラストを受け
ることができる。この際、スラストを受ける突起または
凹みは軸方向では１個所だけしか設けていないことか
ら、ロータ胴は軸方向に延びることができる。[Operation] A protrusion or dent is provided on the surface of the shaft, and on the outside thereof,
If a rotor body made of a material different from that of the shaft is fixed by casting or injection molding, the manufacturing operation becomes easy, and the shaft and the rotor body are securely fixed. And thrust. At this time, the rotor body can extend in the axial direction because only one projection or recess for receiving thrust is provided in the axial direction.
［実施例］ 以下、図面に基づき本考案の実施例を説明する。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本考案の一実施例を示すもので、第５図に示
すスクリュー圧縮機用ロータ２と同様に、ロータ胴2aと
軸３とからなる構成において、上記軸３の中央部分の表
面部に、円周方向に延びる溝型をなす凹み9aをリング状
に１個所だけ設けると共に、該凹み9aに直交する軸方向
に延びる溝型をなす凹み9bを所要長さとして１個所だけ
設け、且つ上記円周方向と軸方向に延びる各凹み9a,9b
を設けた軸３上に、ロータ胴2aを、非鉄金属であるアル
ミ合金の鋳込み製作により一体化させて固定した構成と
する。FIG. 1 shows an embodiment of the present invention. As in the case of the screw compressor rotor 2 shown in FIG. 5, in the configuration comprising the rotor body 2a and the shaft 3, the surface of the central portion of the shaft 3 is shown. In the portion, a groove-shaped recess 9a extending in the circumferential direction is provided in only one place in a ring shape, and a groove-shaped recess 9b extending in the axial direction perpendicular to the recess 9a is provided only in one place as a required length, And the respective recesses 9a and 9b extending in the circumferential direction and the axial direction.
The rotor body 2a is integrally fixed on the shaft 3 provided with the above by casting of an aluminum alloy which is a non-ferrous metal.
本考案のスクリュー圧縮機用ロータ２は、ロータ胴2a
をアルミ合金の鋳込み製作によって軸３に固定すると
き、ロータ胴2aの内周部が凹み9aと9b内に入り込むこと
により軸３とロータ胴2aの係合が行われるようになるの
で、ロータ胴2aに作用するスラストは円周方向に沿う凹
み9aにより受けることができ、トルクは軸方向に沿う凹
み9bにより受けることができる。そのため、強度的に有
利となる。又、ロータ胴2aと軸３の間に熱膨張による軸
方向の相対変位が生じたとしても、円周方向に沿う凹み
9aは軸３の表面部の軸方向中央部に１個所だけしか設け
ておらず、しかもロータ胴2aは軸３に焼き嵌めしていな
いため、ロータ胴2aは凹み9aを境に軸方向両側に延びる
ことができ、上記ロータ胴2aの延びを吸収することがで
きる。The rotor 2 for a screw compressor according to the present invention includes a rotor body 2a.
Is fixed to the shaft 3 by casting of an aluminum alloy, the inner periphery of the rotor body 2a enters into the recesses 9a and 9b so that the shaft 3 and the rotor body 2a are engaged with each other. Thrust acting on 2a can be received by the recess 9a along the circumferential direction, and torque can be received by the recess 9b along the axial direction. Therefore, it is advantageous in strength. Also, even if a relative displacement in the axial direction occurs due to thermal expansion between the rotor body 2a and the shaft 3, the recess along the circumferential direction is
9a is provided only at one position in the center of the surface of the shaft 3 in the axial direction. Further, since the rotor body 2a is not shrink-fitted on the shaft 3, the rotor body 2a is provided on both sides in the axial direction with the recess 9a as a boundary. It can extend, and can absorb the extension of the rotor body 2a.
上記において、ロータ胴2aと軸３との固定は、鋳込み
製作時に、軸３上の凹み9a,9b内にロータ胴2aの内周部
が食い込むことによって確実に行われることから、従来
の如き、ピン穴の加工やピンの打ち込み作業が不要であ
り、製作作業が極めて容易である。In the above, the fixing between the rotor body 2a and the shaft 3 is reliably performed by casting the inner peripheral portion of the rotor body 2a into the recesses 9a and 9b on the shaft 3 during casting, so that the conventional technique is used. There is no need for pin hole processing or pin driving work, and the production work is extremely easy.
次に、第２図は本考案の他の実施例を示すもので、軸
３の表面部に円周方向と軸方向に凹み9aと9bを設けた上
記第１図の実施例に代えて、円周方向に延びる突起8aを
リング状に設けると共に軸方向に延びる突起8bを所要長
さとして設けたものである。Next, FIG. 2 shows another embodiment of the present invention. Instead of the embodiment of FIG. 1 in which the surface of the shaft 3 is provided with recesses 9a and 9b in the circumferential direction and the axial direction, A projection 8a extending in the circumferential direction is provided in a ring shape, and a projection 8b extending in the axial direction is provided as a required length.
第２図の実施例の場合には、ロータ胴2aを軸３の表面
に固定するときに、突起8a,8bがロータ胴2a側へ食い込
むことによってロータ胴2aと軸３とを係合させるので、
第１図の実施例と同様な作用効果が奏し得られる。In the case of the embodiment shown in FIG. 2, when the rotor body 2a is fixed to the surface of the shaft 3, the protrusions 8a and 8b bite into the rotor body 2a side to engage the rotor body 2a with the shaft 3. ,
The same operation and effect as the embodiment of FIG. 1 can be obtained.
更に、第３図は本考案の更に他の実施例を示すもの
で、軸３の表面部に、第１図の実施例の場合と同様に、
円周方向に延びる溝型の凹み9aをリング状に１個所だけ
設けると共に、該凹み9a内の途中に部分的な突起8cを１
個所だけ設けて、上記凹み9aを円周方向に不連続とする
ようにしたものである。FIG. 3 shows still another embodiment of the present invention, in which the surface of the shaft 3 is provided in the same manner as in the embodiment of FIG.
A groove-shaped recess 9a extending in the circumferential direction is provided at only one location in a ring shape, and a partial projection 8c is provided in the recess 9a in the middle.
Only the locations are provided so that the recess 9a is discontinuous in the circumferential direction.
第３図の実施例の場合には、スラストは凹み9aによっ
て受けることができ、トルクは突起8cによって受けるこ
とができる。In the case of the embodiment of FIG. 3, the thrust can be received by the depression 9a and the torque can be received by the projection 8c.
なお、本考案は上記実施例にのみ限定されるものでは
なく、たとえば、上記各実施例では、ロータ胴2aを軸３
上に成形により固定する方式として、鋳込み製作により
固定させるようにした場合を示したが、ロータ胴2aを、
非金属であるエンジニアリングプラスチックやセラミッ
ク等の材料製として軸３上に射出成形により固定させる
ようにしてもよいこと、又、軸３の表面部に設けた円周
方向の凹み9aや突起8aは、軸３のいずれかの端部側へ寄
せるようにしてもよいこと、その他本考案の要旨を逸脱
しない範囲内において種々変更を加え得ることは勿論で
ある。The present invention is not limited to the above embodiment. For example, in each of the above embodiments, the rotor body 2a is connected to the shaft 3
As a method of fixing by molding, the case of fixing by casting was shown, but the rotor body 2a was
It may be made of a material such as non-metallic engineering plastics or ceramics, and may be fixed on the shaft 3 by injection molding. In addition, circumferential recesses 9a and projections 8a provided on the surface of the shaft 3 Needless to say, the shaft 3 may be moved to either end side, and various changes may be made without departing from the scope of the present invention.
［考案の効果］ 以上述べた如く、本考案のスクリュー圧縮機用ロータ
によれば、軸の表面部に、円周方向に延びるリング状の
突起または凹みを１個所だけ設けると共に、上記軸の表
面部に、上記円周方向の突起または凹みと直角に軸方向
へ延びる突起または凹みを１個所だけ設けるか、あるい
は、軸の表面部に、円周方向に延びるリング状の凹みを
１個所だけ設けると共に、該凹みの途中に部分的な突起
を１個所だけ設け、且つ上記軸上に、該軸と異なる材質
のロータ胴を鋳込み製作または射出成形することによ
り、上記軸とロータ胴とを固定してなる構成とし、上記
突起または凹みでトルク及びスラストを受けるようにし
てあるので、従来の焼き嵌め及びピン固定方式の如きピ
ン穴の加工やピンの打ち込み作業を行うことなく、ロー
タ胴と軸とを確実に固定できると共に、容易に製作する
ことができ、しかも熱膨張によるロータ胴と軸との間の
軸方向の伸び差を軸方向へ吸収させることができ、強度
的に有利なものとすることができる、等の優れた効果を
発揮する。[Effects of the Invention] As described above, according to the rotor for a screw compressor of the present invention, only one ring-shaped projection or recess extending in the circumferential direction is provided on the surface of the shaft, and the surface of the shaft is provided. The part is provided with only one projection or recess extending in the axial direction at right angles to the circumferential projection or recess, or the surface of the shaft is provided with only one ring-shaped recess extending in the circumferential direction. At the same time, only one partial projection is provided in the middle of the recess, and a rotor body made of a material different from that of the shaft is cast or manufactured or injection-molded on the shaft, thereby fixing the shaft and the rotor body. And the torque or thrust is received by the above-mentioned projections or depressions.Therefore, there is no need to perform pin hole processing or pin driving work as in the conventional shrink fitting and pin fixing method, and to make contact with the rotor body. A shaft that can be securely fixed and can be easily manufactured. In addition, it is possible to absorb the axial expansion difference between the rotor body and the shaft due to thermal expansion in the axial direction, which is advantageous in strength. And other excellent effects.
第１図は本考案のスクリュー圧縮機用ロータの一実施例
を示す一部切断斜視図、第２図は本考案の他の実施例を
示す一部切断斜視図、第３図は本考案の更に他の実施例
を示す一部切断斜視図、第４図はスクリュー圧縮機の一
例を示す概要図、第５図は従来のスクリュー圧縮機用ロ
ータの一例を示す概略図である。 ２……スクリュー圧縮機用ロータ、2a……ロータ胴、３
……軸、8a,8b,8c……突起、9a,9b……凹み。FIG. 1 is a partially cutaway perspective view showing an embodiment of the rotor for a screw compressor of the present invention, FIG. 2 is a partially cutaway perspective view showing another embodiment of the present invention, and FIG. FIG. 4 is a schematic view showing an example of a screw compressor, and FIG. 5 is a schematic view showing an example of a conventional rotor for a screw compressor. 2 ... rotor for screw compressor, 2a ... rotor body, 3
… Axes, 8a, 8b, 8c …… Protrusions, 9a, 9b …… Recesses.
Claims (2)
の突起または凹みを１個所だけ設けると共に、上記軸の
表面部に、上記円周方向の突起または凹みと直角に軸方
向へ延びる突起または凹みを１個所だけ設け、且つ該突
起または凹みを設けた軸上に、該軸と異なる材質のロー
タ胴を鋳込み製作または射出成形することにより、上記
軸とロータ胴とを固定してなることを特徴とするスクリ
ュー圧縮機用ロータ。1. A surface of the shaft is provided with only one ring-shaped projection or recess extending in the circumferential direction, and the surface of the shaft is axially perpendicular to the circumferential projection or recess. The shaft and the rotor body are fixed by providing only one extending protrusion or recess and casting or manufacturing a rotor body of a different material from the shaft on the shaft provided with the protrusion or recess. A rotor for a screw compressor, comprising:
の凹みを１個所だけ設けると共に、該凹みの途中に部分
的な突起を１個所だけ設け、且つ該突起または凹みを設
けた軸上に、該軸と異なる材質のロータ胴を鋳込み製作
または射出成形することにより、上記軸とロータ胴とを
固定してなることを特徴とするスクリュー圧縮機用ロー
タ。2. A single ring-shaped recess extending in the circumferential direction is provided on the surface of the shaft, and only one partial projection is provided in the middle of the recess, and the projection or the recess is provided. A rotor for a screw compressor, wherein a rotor body made of a material different from that of the shaft is cast or manufactured on the shaft to fix the shaft and the rotor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989100544U JP2550802Y2 (en) | 1989-08-30 | 1989-08-30 | Rotor for screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989100544U JP2550802Y2 (en) | 1989-08-30 | 1989-08-30 | Rotor for screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342083U JPH0342083U (en) | 1991-04-22 |
| JP2550802Y2 true JP2550802Y2 (en) | 1997-10-15 |
Family
ID=31649547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989100544U Expired - Fee Related JP2550802Y2 (en) | 1989-08-30 | 1989-08-30 | Rotor for screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2550802Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006348919A (en) * | 2005-06-20 | 2006-12-28 | Yamada Seisakusho Co Ltd | Rotor device for pump |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4837811U (en) * | 1971-09-08 | 1973-05-09 | ||
| JPS5062108U (en) * | 1973-10-02 | 1975-06-06 | ||
| JPS59165987U (en) * | 1983-04-23 | 1984-11-07 | トヨタ自動車株式会社 | Roots pump rotor support structure |
| JPS61169689A (en) * | 1985-01-23 | 1986-07-31 | Hitachi Ltd | Complex screw rotor |
| JPS63100683U (en) * | 1986-12-19 | 1988-06-30 | ||
| JPS63243478A (en) * | 1987-03-30 | 1988-10-11 | Aisin Seiki Co Ltd | Rotor for fluid equipment |
| JP2645261B2 (en) * | 1988-05-31 | 1997-08-25 | ブラザー工業株式会社 | Screw rotor |
-
1989
- 1989-08-30 JP JP1989100544U patent/JP2550802Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0342083U (en) | 1991-04-22 |
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| LAPS | Cancellation because of no payment of annual fees |