JP2618825B2 - Intercoolerless air-cooled 4-stage roots vacuum pump - Google Patents
Intercoolerless air-cooled 4-stage roots vacuum pumpInfo
- Publication number
- JP2618825B2 JP2618825B2 JP6067860A JP6786094A JP2618825B2 JP 2618825 B2 JP2618825 B2 JP 2618825B2 JP 6067860 A JP6067860 A JP 6067860A JP 6786094 A JP6786094 A JP 6786094A JP 2618825 B2 JP2618825 B2 JP 2618825B2
- Authority
- JP
- Japan
- Prior art keywords
- compression chamber
- stage compression
- stage
- rotor
- roots
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、主として液化フロンガ
スに代替させたウオーター又は炭化水素系洗浄液により
物品を洗浄した後、その物品に残存するウオーター又は
炭化水素系洗浄液を乾燥するために使用する空冷式真空
ポンプにかかり、1台のモーターにより駆動できる極め
て圧縮効率が良いインタークーラーレス空冷式4段ルー
ツ型真空ポンプを提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooling method which is mainly used for drying a water or hydrocarbon-based cleaning liquid remaining in the product after cleaning the product with a water or hydrocarbon-based cleaning liquid substituted with liquefied CFC gas. The present invention provides an intercooler-less air-cooled four-stage roots-type vacuum pump which has a very high compression efficiency and which can be driven by a single motor.
【0002】[0002]
【従来の技術】特開昭63ー29089公報に左右で平
行にした2段型送風機が記載されているが4段型にする
ことを示唆するものではない。従来の形式になるルーツ
式空冷多段真空ポンプは、ドライ式であることから近年
その需要も多くなつた。しかし到達真空度が10Torr〜
1×10-2Torrになると各段室間に長大なインタークー
ラーを必要とするため、コストの上昇とか形状の大型
化、配管の複雑化等と共に、インタークーラーの過冷却
が管理上で生じ易く、ロータ回転ロツクのトラブルも発
生しがちになる等の欠点がある。2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 63-29089 discloses a two-stage blower which is parallel to the left and right, but does not suggest that a four-stage blower is used. Roots type air-cooled multi-stage vacuum pumps, which are conventional types, are of a dry type, and their demand has increased in recent years. However, the ultimate vacuum is 10 Torr ~
At 1 × 10 -2 Torr, a long intercooler is required between each stage chamber, which increases costs, enlarges the shape, and complicates piping. There are drawbacks, such as troubles in the rotation lock tend to occur.
【0003】[0003]
【発明が解決しようとする課題】本発明は前記の欠点を
除き、外殻本体と、該本体の前後に組付けたハウジング
取付片と、外殻本体及びハウジング取付片の左右に組付
けた内面円弧形のキャツプにより構成したポンプ外郭構
成要素の内部に、2段ずつ左右に平行させたロータとロ
ータ軸の具備により、4段型であつても従来の3段型真
空ポンプの厳しい圧縮率に匹敵する圧縮率に緩和して各
段間毎に必要なインタークーラーの具備を不要とし、さ
らに、各段間の配管を前記した外郭構成要素内でできる
インタークーラーレス空冷式4段ルーツ型真空ポンプの
開発を研究課題とし、目的とするものである。SUMMARY OF THE INVENTION Except for the above-mentioned drawbacks, the present invention provides an outer shell body, a housing mounting piece assembled before and after the main body, and inner surfaces assembled on the left and right sides of the outer shell body and the housing mounting piece. Strict compression ratio of the conventional three-stage vacuum pump even if it is a four-stage type, due to the provision of a rotor and a rotor shaft which are two-stage parallel to the left and right inside a pump shell component constituted by an arc-shaped cap The compression ratio is reduced to a level comparable to that of the prior art, so that it is not necessary to provide an intercooler required for each stage. Development is a research theme, and it is the purpose.
【0004】[0004]
【課題を解決するための手段】本発明は前記の目的に合
致させたもので、外殻本体と、該本体の前後に組付けた
ハウジング取付片と、外殻本体及びハウジング取付片の
左右に組付けた内面円弧形のキャツプにより構成したポ
ンプ外郭構成要素の内部に、前部の第1段圧縮室及び後
部の第3段圧縮室を前記ハウジング取付片に組付け、ま
たは一体形成した前後の1方のハウジングに合致させて
設け、前部の第2段圧縮室及び後部の第4段圧縮室とを
前記前後の他方のハウジングに合致させて設けると共
に、第1段圧縮室と第3段圧縮室とに、それぞれのルー
ツ型ロータと、該各ロータの第1ロータ軸を挿通し、第
2段圧縮室と第4段圧縮室とにそれぞれのルーツ型ロー
タと該各ロータの第2ロータ軸を挿通し、第1ロータ軸
と第2ロータ軸のポンプ外郭構成要素の各後部のハウジ
ングから突出する外部に、一台のモータにより連動でき
る第1プーリと第2プーリ及び、各軸ごとの空気冷却フ
アンを設け、前記の第1段圧縮室と第2段圧縮室とをポ
ンプ外郭構成要素内の第1段、第2段圧縮室間の通路に
より連通し、前記第2段圧縮室の吐出口と第3段圧縮室
の吸込口とをポンプ外郭構成要素内に形成した第2段、
第3段圧縮室間の通路により連通し、第3段圧縮室と第
4段圧縮室とをポンプ外郭構成要素内の第3段、第4段
圧縮室間の通路により連通したことを特徴とするインタ
ークーラーレス空冷式4段ルーツ型真空ポンプにかかる
ものである。SUMMARY OF THE INVENTION The present invention has been made to meet the above-mentioned object, and has an outer shell main body, housing mounting pieces assembled before and after the main body, and left and right sides of the outer shell main body and the housing mounting piece. A front and rear stage first compression chamber and a rear third stage compression chamber are assembled or integrally formed with the housing mounting piece inside the pump shell component constituted by the assembled inner surface arc-shaped cap. Of the first stage compression chamber and the third stage compression chamber of the third stage, the second stage compression chamber of the front part and the fourth stage compression chamber of the rear part are provided so as to match the other housing of the front and rear. The respective roots-type rotors and the first rotor shaft of each rotor are inserted into the stage compression chambers, and the respective roots-type rotors and the second rotors of the respective rotors are inserted into the second-stage compression chamber and the fourth-stage compression chamber. Insert the rotor shaft, and position the first and second rotor shafts. A first pulley and a second pulley, which can be linked by a single motor, and an air cooling fan for each shaft are provided on the outside protruding from the housing at each rear portion of the outer shell components. The two-stage compression chamber communicates with a passage between the first-stage and second-stage compression chambers in the pump shell component, and the discharge port of the second-stage compression chamber and the suction port of the third-stage compression chamber are connected to the outer shell of the pump. A second stage formed in the component,
The third stage compression chamber is communicated by a passage between the third stage compression chambers, and the third stage compression chamber and the fourth stage compression chamber are communicated by a passage between the third stage and fourth stage compression chambers in the outer shell component of the pump. Intercoolerless air-cooled four-stage roots vacuum pump.
【0005】[0005]
【作用】本発明は、実施例に記載した構成のポンプ外郭
構成要素1の内部に、前部の第1段圧縮室7及び後部の
第3段圧縮室9と、前部の第2段圧縮室8及び後部の第
4段圧縮室10とを平行に設け、第1段圧縮室7と第3
段圧縮室9にルーツ型ロータ11、13とそれらのロー
タの第1ロータ軸14を挿通し、該第1ロータ軸14の
後部のハウジング5から突出する外部と、第2段圧縮室
8と第4段圧縮室10にルーツ型ロータ12、15とそ
れらの第2ロータ軸16を挿通し、該第2ロータ軸16
の後部のハウジング5から突出する外部とに、1個のモ
ータMにより駆動される第1プーリ17と第2プーリ1
8とを設け、第1ロータ軸14、第2ロータ軸16を1
個のモータにより駆動する構成により、低真空域から高
真空域への甚だしいパツチ運転への運転の所要馬力の変
化を同一にする必要性を簡易に満たすことができ、特に
低真空域では第1ロータ軸14側に負担が大きく、高真
空域では第2ロータ軸16に負担が大きいのを容易に平
均化できる。また、本発明は第1段圧縮室7と第2段圧
縮室8を通路21により連通し、第2段圧縮室8の吐出
口側8bと第3段圧縮室9の吸込側9aとを通路22に
より連通し、第3段圧縮室9と第4段圧縮室10を通路
23により連通して4段の圧縮を実現する。それらの通
路21〜23をポンプ外郭構成要素1の内部に構成して
配管を不用にするのも本発明の初めての提案であつて、
第1ロータ軸14と第2ロータ軸16に冷却フアン1
9、20によりポンプ外郭構成要素1を冷却する空冷式
にすることと相俟つて極めて有利なインタークーラーレ
ス空冷式真空ポンプの作用を生じさせ得る。尤もインタ
ークーラーレスであつても第4段段圧縮室10の吐出口
から吐出される吐出ガスをインタークーラーにより冷却
し、温度差を減少して大気中に放出することもできる。According to the present invention, the first outer stage compression chamber 7 and the third rear stage compression chamber 9 and the second front stage compression chamber are provided inside the pump shell component 1 having the structure described in the embodiment. The chamber 8 and the rear fourth-stage compression chamber 10 are provided in parallel, and the first-stage compression chamber 7 and the third
The roots-type rotors 11 and 13 and the first rotor shafts 14 of the rotors are inserted into the stage compression chamber 9, and the outside protruding from the housing 5 at the rear of the first rotor shaft 14, the second stage compression chamber 8 and the second The roots type rotors 12 and 15 and their second rotor shafts 16 are inserted into the four-stage compression chamber 10, and the second rotor shafts 16
The first pulley 17 and the second pulley 1 driven by one motor M are connected to the outside protruding from the rear housing 5.
8 and the first rotor shaft 14 and the second rotor shaft 16
With the configuration driven by two motors, it is possible to easily satisfy the necessity of equalizing the change in horsepower required for the operation from the low vacuum range to the high vacuum range to the severe patch operation. The load on the rotor shaft 14 side is large, and the load on the second rotor shaft 16 is large in a high vacuum region, which can be easily averaged. Further, in the present invention, the first-stage compression chamber 7 and the second-stage compression chamber 8 are communicated by the passage 21, and the discharge port side 8b of the second-stage compression chamber 8 and the suction side 9a of the third-stage compression chamber 9 are communicated with each other. The third stage compression chamber 9 and the fourth stage compression chamber 10 are communicated by a passage 23 to realize four-stage compression. It is also the first proposal of the present invention that the passages 21 to 23 are formed inside the pump shell component 1 to eliminate piping.
The cooling fan 1 is attached to the first rotor shaft 14 and the second rotor shaft 16.
Along with the air-cooling method for cooling the pump outer casing component 1 by means of 9, 20, it is possible to produce a very advantageous effect of an intercooler-less air-cooling vacuum pump. Even if the intercooler is not used, the discharge gas discharged from the discharge port of the fourth-stage compression chamber 10 can be cooled by the intercooler, the temperature difference can be reduced, and the gas can be discharged into the atmosphere.
【0006】[0006]
【実施例】添付図面は本発明の1実施例を示すもので、
図1は図2の所要部切断平面図、図2は図1AーA線の
切断正面図、図3は図1BーB線切断側面図であつて第
2プーリは省略してある。図4は外殻本体の斜視図、図
5はルーツ型ロータとロータ軸の一例の斜視図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The accompanying drawings show one embodiment of the present invention.
FIG. 1 is a plan view of a required portion of FIG. 2, FIG. 2 is a front view of a section taken along the line AA of FIG. 1, and FIG. 3 is a side view of a section taken along the line 1B-B of FIG. FIG. 4 is a perspective view of an outer shell main body, and FIG. 5 is a perspective view of an example of a roots type rotor and a rotor shaft.
【0007】1は一体鋳造の外殻本体2と、該外殻本体
2の前後に組付けたハウジング取付片3、3aと、外郭
本体2及びハウジング取付片3、3aの左右に組付けた
内面半円弧形のキャツプ4、4aとにより構成したポン
プ外郭構成要素であつて、該要素1の内部に隔壁6によ
り隔てた前部の第1段圧縮室7及び後部の第3段圧縮室
9を前記ハウジング取付片3、3aに組付けたハウジン
グ5、5a・5′、5a′の内の図1右方のハウジング
5、5aに合致させて設け、さらに隔壁6aにより隔て
た前部の第2段圧縮室8及び後部の第4段圧縮室10を
前記左方のハウジング5′、5a′に合致させて設け
る。第1段圧縮室7と第3段圧縮室9とに、ルーツ型ロ
ータ11と、ルーツ型ロータ13と、該各ロータの第1
ロータ軸14を挿通し、第2段圧縮室8と第4段圧縮室
10とにルーツ型ロータ12とルーツ型ロータ15と、
各ルーツ型ロータの第2ロータ軸16を挿通すると共
に、第1ロータ軸13とポンプ外郭構成要素1のハウジ
ング5aから突出する後部と、ハウジング5a′から突
出する第2ロータ軸16の後部に、一台のモータMによ
り連動できる第1プーリ17と第2プーリ18及び、各
軸13、16ごとの空気冷却フアン19、20を設け
る。Reference numeral 1 designates an integrally cast outer shell body 2, housing mounting pieces 3 and 3a assembled to the front and rear of the outer shell body 2, and inner surfaces assembled to the left and right of the outer shell body 2 and the housing mounting pieces 3 and 3a. A pump outer component comprising a semicircular cap 4, 4a, wherein a front first-stage compression chamber 7 and a rear third-stage compression chamber 9 separated by a partition 6 inside the element 1. Of the housings 5, 5a, 5 ', 5a' assembled to the housing mounting pieces 3, 3a are aligned with the housings 5, 5a on the right side in FIG. 1 and are further separated by a partition wall 6a. A second-stage compression chamber 8 and a rear-stage fourth-stage compression chamber 10 are provided so as to match the left housings 5 ', 5a'. The first-stage compression chamber 7 and the third-stage compression chamber 9 are provided with a roots-type rotor 11, a roots-type rotor 13, and a first rotor of each rotor.
The rotor shaft 14 is inserted, and the roots-type rotor 12 and the roots-type rotor 15 are provided in the second-stage compression chamber 8 and the fourth-stage compression chamber 10, respectively.
While inserting the second rotor shaft 16 of each roots type rotor, the first rotor shaft 13 and the rear portion of the pump shell component 1 protruding from the housing 5a, and the rear portion of the second rotor shaft 16 protruding from the housing 5a ', A first pulley 17 and a second pulley 18 that can be linked by one motor M, and air cooling fans 19 and 20 for each shaft 13 and 16 are provided.
【0008】前記第1段圧縮室7と第2段圧縮室8をポ
ンプ外郭構成要素1内の左右の第1段、第2段圧縮室間
の通路21により連通し、第2段圧縮室8の吐出口8b
と第3段圧縮室9の吸込口9aを外郭構成要素1内の左
右の第2段、第3段圧縮室間の通路22により連通し、
第3段圧縮室9と第4段圧縮室10とを外郭構成要素1
内の第3段、第4段圧縮室間の通路23により連通す
る。The first-stage compression chamber 7 and the second-stage compression chamber 8 communicate with each other through a passage 21 between the left and right first-stage and second-stage compression chambers in the outer casing component 1 of the pump. Discharge port 8b
And the suction port 9a of the third-stage compression chamber 9 are communicated with each other by the passage 22 between the left and right second-stage and third-stage compression chambers in the outer shell component 1.
The third-stage compression chamber 9 and the fourth-stage compression chamber 10 are separated from each other by the outer shell component 1
The third and fourth stages communicate with each other through a passage 23 between the compression chambers.
【0009】第1段、第2段及び第3段、第4段圧縮室
7〜10は何れもまゆ型である。ルーツ型ロータは本実
施例においては図2のように2個1組の3葉型を使用す
る。第1ロータ軸14及び第2ロータ軸16の後部をハ
ウジング5、5′により軸支して突出し、外殻本体2の
上面の据付板31に据付けたモータMの出力軸に設けた
モータプーリに掛けたVベルト32、33を第1プーリ
17と第2プーリ18とに掛けて第1ロータ軸14と第
2ロータ軸16を駆動する。外殻本体2を含むポンプ外
郭構成要素1の外面には冷却フイン34を形成し、冷却
フアン19、20の冷却風を浴びせて冷却する。前部の
ハウジング5aの内部には上下の第1ロータ軸14、1
4に固定したタイミングギヤ35、35を固定して潤滑
油中で噛合わせる。ハウジング5a′内の第2ロータ軸
16、16の上下に固定したタイミングギヤ36、36
についても同じである。最終段圧縮室である第4段圧縮
室10のケーシングの吐出口に連通する周壁に大気連通
口Rを設ける。Each of the first, second, third, and fourth stage compression chambers 7 to 10 is a cocoon type. In this embodiment, a roots type rotor uses a pair of three-lobe type rotors as shown in FIG. The rear portions of the first rotor shaft 14 and the second rotor shaft 16 are rotatably supported by the housings 5 and 5 ′ and project from the motor pulley provided on the output shaft of the motor M installed on the installation plate 31 on the upper surface of the outer shell body 2. The V-belts 32 and 33 are hung on the first pulley 17 and the second pulley 18 to drive the first rotor shaft 14 and the second rotor shaft 16. Cooling fins 34 are formed on the outer surface of the pump shell component 1 including the outer shell body 2, and are cooled by being exposed to cooling air from the cooling fans 19 and 20. Inside the front housing 5a, the upper and lower first rotor shafts 14, 1
The timing gears 35 fixed to 4 are fixed and meshed in the lubricating oil. Timing gears 36, 36 fixed above and below the second rotor shafts 16, 16 in the housing 5a '
Is the same. An atmosphere communication port R is provided on the peripheral wall that communicates with the discharge port of the casing of the fourth compression chamber 10, which is the final compression chamber.
【0010】第1段圧縮室7、第2段圧縮室8、第3段
圧縮室9、第4段圧縮室10はルーツ型ロータ11、1
2、13、14による圧縮率増加の多段真空ポンプの目
的を達成するものであるが、それには第1ロータ軸、第
2ロータ軸の軸速の変化、前記各段圧縮室の容積変化等
による設計の範囲で解決できるもので、軸速の変化は例
えば第1プーリ17と第2プーリの径の相対的変化によ
り実現できる。図1の各段圧縮室、各段ルーツ型ロータ
は本実施例の存在位置に関する模図に過ぎない。要する
に各段圧縮室の容積、各段ルーツ型ロータの形状は、設
計により決定するもので、設計の都合によりルーツ型ロ
ータ11とルーツ型ロータ12及びルーツ型ロータ13
とルーツ型ロータ15が同型になることもある。The first-stage compression chamber 7, the second-stage compression chamber 8, the third-stage compression chamber 9, and the fourth-stage compression chamber 10 include roots-type rotors 11, 1
The object of the multi-stage vacuum pump of increasing the compression ratio by 2, 13, 14 is to achieve, by changing the axial speed of the first rotor shaft and the second rotor shaft, and changing the volume of each stage compression chamber. The change in the shaft speed can be achieved by, for example, a relative change in the diameter of the first pulley 17 and the diameter of the second pulley. Each stage compression chamber and each stage roots-type rotor in FIG. 1 are merely schematic diagrams relating to the location of the present embodiment. In short, the volume of each stage compression chamber and the shape of each stage roots-type rotor are determined by the design, and the roots-type rotor 11, the roots-type rotor 12, and the roots-type rotor 13 are designed for the convenience of the design.
And the roots type rotor 15 may be of the same type .
【発明の効果】本発明は、前記により明かにしたよう
に、第1段圧縮室7、第3段圧縮室9と第2段圧縮室
8、第4段圧縮室10の並列構成と、ルーツ型ロータ1
1、13とそれらのロータ軸14の第1段圧縮室7、第
3段圧縮室9への挿通、ルーツ型ロータ12、15とそ
れらの第2ロータ軸16の第2段圧縮室8、第4段圧縮
室10への挿通と、第1ロータ軸14、第2ロータ軸1
6の各外部突出部の1台のモータMにより駆動できる第
1プーリ17、第2プーリ18の各固定と、配管を使用
しないでポンプ外郭構成要素1の内部に構成する通路2
1、22、23により第1段圧縮室7と第2段圧縮室8
の連通、該圧縮室8の吐出口8bと第3段圧縮室9の吸
込口9aとの連通、第3段圧縮室9と第4段圧縮室10
連通を生じさせ、第1、第2ロータ軸14、16の冷却
フアン19、20によるポンプ外郭要素1の空気冷却と
相俟って、新型式のインタークーラーレス空冷式4段ル
ーツ型真空ポンプを提供できる効果をもつ。As described above, the present invention provides a parallel configuration of the first-stage compression chamber 7, the third-stage compression chamber 9, the second-stage compression chamber 8, and the fourth-stage compression chamber 10 as well as the roots. Type rotor 1
1, 13 and their rotor shafts 14 inserted into the first-stage compression chamber 7 and the third-stage compression chamber 9, and the roots-type rotors 12, 15 and their second-stage compression chambers 8 of the second rotor shaft 16; Insertion into the four-stage compression chamber 10, the first rotor shaft 14, the second rotor shaft 1
6, each of the first pulley 17 and the second pulley 18 which can be driven by one motor M of each external projection, and the passage 2 formed inside the pump outer component 1 without using piping.
First, second, and third compression chambers 7 and 8 are provided by 1, 22, and 23.
Communication between the discharge port 8b of the compression chamber 8 and the suction port 9a of the third compression chamber 9, and the third compression chamber 9 and the fourth compression chamber 10
A new type of intercoolerless, air-cooled, four-stage roots vacuum pump is provided that creates communication and, in combination with air cooling of the pump shell element 1 by the cooling fans 19, 20 of the first and second rotor shafts 14, 16, Has an effect that can be.
添付図面は本発明の1実施例を示すもので、 The accompanying drawings illustrate one embodiment of the present invention,
【図1】図1は図2の所要部切断平面図FIG. 1 is a plan view of a required part of FIG. 2;
【図2】図2は図1AーA線切断正面図FIG. 2 is a front view cut along the line AA of FIG. 1;
【図3】図3は図1BーB線切断側面図であつて、第2
プーリは省略してあるFIG. 3 is a side view cut along a line BB in FIG. 1;
Pulleys omitted
【図4】図4は外殻本体の斜視図FIG. 4 is a perspective view of an outer shell body.
【図5】図5はルーツ型ロータとロータ軸の斜視図FIG. 5 is a perspective view of a roots type rotor and a rotor shaft.
1→ポンプ外郭構成要素 2→外殻本体 3、3a→ハ
ウジング取付片 4、4a→キヤツプ 5、5a・5′、5a′→ハウジ
ング 6、6a・6′、6a′→隔壁 7→第1段圧縮室 8
→第2段圧縮室 8b→吐出口 9→第3段圧縮室 9a→吸込口 10
→第4段圧縮室 11、13→ルーツ型ロータ 14→第1ロータ軸 12、15→ルーツ型ロータ 16→第2ロータ軸 M
→モータ 17→第1プーリ 18→第2プーリ 19、20→冷
却フアン 21→通路 22→通路 23→通路 31→据付板 32、33→Vベルト 34→冷却フイ
ン 35、36→タイミングギヤ1 → Pump shell component 2 → Outer shell body 3, 3a → Housing mounting piece 4, 4a → Cap 5, 5a · 5 ′, 5a ′ → Housing 6, 6a ・ 6 ′, 6a ′ → Partition 7 → First stage Compression chamber 8
→ 2nd stage compression chamber 8b → discharge port 9 → 3rd stage compression chamber 9a → suction port 10
→ Fourth stage compression chambers 11, 13 → Roots rotor 14 → First rotor shaft 12, 15 → Roots rotor 16 → Second rotor shaft M
→ motor 17 → first pulley 18 → second pulley 19,20 → cooling fan 21 → passage 22 → passage 23 → passage 31 → installation plates 32, 33 → V-belt 34 → cooling fins 35, 36 → timing gear
Claims (1)
ジング取付片と、外殻本体及びハウジング取付片の左右
に組付けた内面円弧形のキャツプにより構成したポンプ
外郭構成要素の内部に、 前部の第1段圧縮室及び後部の第3段圧縮室を前記ハウ
ジング取付片に組付け、または一体形成した前後の1方
のハウジングに合致させて設け、前部の第2段圧縮室及
び後部の第4段圧縮室とを前記前後の他方のハウジング
に合致させて設けると共に、 第1段圧縮室と第3段圧縮室とに、それぞれのルーツ型
ロータと、該各ロータの第1ロータ軸を挿通し、第2段
圧縮室と第4段圧縮室とにそれぞれのルーツ型ロータと
該各ロータの第2ロータ軸を挿通し、 第1ロータ軸と第2ロータ軸のポンプ外郭構成要素の各
後部のハウジングから突出する外部に、一台のモータに
より連動できる第1プーリと第2プーリ及び、各軸ごと
の冷却フアンを設け、 前記の第1段圧縮室と第2段圧縮室とをポンプ外郭構成
要素内の第1段、第2段圧縮室間の通路により連通し、
前記第2段圧縮室の吐出口と第3段圧縮室の吸込口とを
ポンプ外郭構成要素内に形成した第2段、第3段圧縮室
間の通路により連通し、第3段圧縮室と第4段圧縮室と
をポンプ外郭構成要素内の第3段、第4段圧縮室間の通
路により連通したことを特徴とするインタークーラーレ
ス空冷式4段ルーツ型真空ポンプ。Claim: What is claimed is: 1. A pump shell component comprising an outer shell main body, housing mounting pieces assembled before and after the main body, and inner surface arc-shaped caps assembled on the left and right sides of the outer shell main body and the housing mounting piece. A first stage compression chamber at the front and a third stage compression chamber at the rear are assembled to the housing mounting piece or provided so as to match one of the front and rear housings integrally formed therein. A compression chamber and a rear fourth stage compression chamber are provided so as to match the other front and rear housings, and a roots type rotor and a rotor of each rotor are provided in the first stage compression chamber and the third stage compression chamber. The first rotor shaft is inserted, the roots-type rotors and the second rotor shafts of the rotors are inserted into the second-stage compression chamber and the fourth-stage compression chamber, and the pumps of the first rotor shaft and the second rotor shaft are inserted. External projecting from each rear housing of shell components A first pulley and a second pulley that can be interlocked by one motor, and a cooling fan for each shaft, and the first-stage compression chamber and the second-stage compression chamber are provided in a first-stage pump outer component. , Through the passage between the second-stage compression chambers,
The discharge port of the second-stage compression chamber and the suction port of the third-stage compression chamber communicate with each other through a passage between the second-stage and third-stage compression chambers formed in the outer shell component of the pump. An intercooler-less air-cooled four-stage roots-type vacuum pump, characterized in that the fourth-stage compression chamber communicates with a passage between the third-stage and fourth-stage compression chambers inside the pump shell component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6067860A JP2618825B2 (en) | 1994-03-10 | 1994-03-10 | Intercoolerless air-cooled 4-stage roots vacuum pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6067860A JP2618825B2 (en) | 1994-03-10 | 1994-03-10 | Intercoolerless air-cooled 4-stage roots vacuum pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07247975A JPH07247975A (en) | 1995-09-26 |
JP2618825B2 true JP2618825B2 (en) | 1997-06-11 |
Family
ID=13357119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6067860A Expired - Lifetime JP2618825B2 (en) | 1994-03-10 | 1994-03-10 | Intercoolerless air-cooled 4-stage roots vacuum pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2618825B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4746982B2 (en) | 2005-12-27 | 2011-08-10 | 積水化学工業株式会社 | Single stage roots type vacuum pump and vacuum fluid transfer system using this single stage roots type vacuum pump |
WO2008152713A1 (en) * | 2007-06-13 | 2008-12-18 | Kashiyama Industries, Ltd. | Roots pump and method of producing roots pump |
JP4844489B2 (en) * | 2007-07-19 | 2011-12-28 | 株式会社豊田自動織機 | Fluid machinery |
CN112502978A (en) * | 2020-12-17 | 2021-03-16 | 西安向阳新环保科技有限公司 | Mechanical vacuum pump unit with refrigeration equipment |
-
1994
- 1994-03-10 JP JP6067860A patent/JP2618825B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07247975A (en) | 1995-09-26 |
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