JPS6229781A - Eccentric screw pump - Google Patents
Eccentric screw pumpInfo
- Publication number
- JPS6229781A JPS6229781A JP17024985A JP17024985A JPS6229781A JP S6229781 A JPS6229781 A JP S6229781A JP 17024985 A JP17024985 A JP 17024985A JP 17024985 A JP17024985 A JP 17024985A JP S6229781 A JPS6229781 A JP S6229781A
- Authority
- JP
- Japan
- Prior art keywords
- stator
- eccentric screw
- screw pump
- core metal
- metal mold
- 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.)
- Pending
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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、摩耗性、腐蝕性の大きい流体や高温流体の
圧送に好適な偏心ねじポンプに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an eccentric screw pump suitable for pumping highly abrasive and corrosive fluids and high-temperature fluids.
回転軸線に対して偏心した円形断面を有する雄ねじ状ロ
ータを、半円状部分と直線状部分とよりなる長円形断面
を有し、ピッチがロータの２倍の雌ねじ状の内面を形成
したステータに装着し、このロータが回転軸心を中心と
して回転すると共に、ステータの軸心に対して偏心運動
を行うように構成した偏心ねじポンプは、粘性の高い流
体の輸送に好適なポンプとして広（用いられている。A male threaded rotor with a circular cross section that is eccentric with respect to the rotational axis is connected to a stator that has an oval cross section consisting of a semicircular part and a straight part, and has a female threaded inner surface with a pitch twice that of the rotor. Eccentric screw pumps, which are configured so that the rotor rotates around the rotational axis and performs eccentric movement with respect to the stator axis, are widely used as pumps suitable for transporting highly viscous fluids. It is being
このような偏心ねじポンプにおいて、従来、ステータは
ゴム製または金属製のものが用いられていた。In such eccentric screw pumps, the stator has conventionally been made of rubber or metal.
しかし、従来のゴム製ステータを用いた偏心ねじポンプ
は、ステータのゴム材質の特性により最高使用温度の制
限を受け、使用温度の上昇とともに物理的性質が劣化す
るため、高温流体圧送用としては不適であり、また、耐
溶剤性が悪（、ラッカーなどの溶剤圧送用としても使用
できなかった。However, conventional eccentric screw pumps using rubber stators are not suitable for high-temperature fluid pumping because their maximum operating temperature is limited by the characteristics of the stator's rubber material, and their physical properties deteriorate as the operating temperature rises. It also had poor solvent resistance (and could not be used for pumping solvents such as lacquer).
さらに、偏心ねじポンプは、機構上ロータがステータ内
面に強く圧接されて回転するため、ゴム製ステータを用
いた場合、圧送流体中に固形粒子があると短時間でステ
ータが摩耗したり引裂かれて損傷する。特に食品圧送用
では、ステータの摩耗片が食品中に混入するという問題
があった。これに対し、摩耗や損傷を防止するためステ
ータを金属製とする場合、雌ねじ状の内面の形状が複雑
で精度を要するため切削加工が極めて困難であり、高価
になるという欠点がある。Furthermore, mechanically, eccentric screw pumps rotate with the rotor strongly pressed against the inner surface of the stator, so if a rubber stator is used, solid particles in the pumped fluid can cause the stator to wear or tear in a short period of time. damage. Particularly in the case of pressure-feeding food, there is a problem in that worn pieces of the stator get mixed into the food. On the other hand, when the stator is made of metal to prevent wear and damage, the internal threaded inner surface has a complicated shape and requires precision, making cutting extremely difficult and expensive.
この発明は、偏心ねじポンプにおけるか＼る問題、を解
決するものである。This invention solves these problems in eccentric screw pumps.
而して、この発明は、ステータが耐熱性、耐溶剤性、耐
摩耗性、耐蝕性に優れており、長時間の使用に耐え、食
品圧送用にも安心して使用でき、しかも比較的安価な偏
心ねじポンプを提供することを目的とする。Therefore, the stator of this invention has excellent heat resistance, solvent resistance, abrasion resistance, and corrosion resistance, can withstand long-term use, can be safely used for food pressure conveyance, and is relatively inexpensive. The purpose is to provide an eccentric screw pump.
この発明の偏心ねじポンプは、中金型の滑表面をうつし
とることにより内面を雌ねじ状に成形し焼結したセラミ
ックスをステータとして、その一端に吸込部、他端に吐
出部を接続し、このステータに雄ねじ状ロータを装着し
ている。The eccentric screw pump of the present invention has a stator made of ceramics whose inner surface is formed into a female thread shape by removing the smooth surface of a middle mold, and which is sintered.The stator is connected to a suction portion at one end and a discharge portion at the other end. A male-threaded rotor is attached to the stator.
この発明では、セラミックスが、中金型の滑表面をうつ
しとることにより、ステータが高い精度で成形されるた
め、焼結後ステータ内面の研削加工は不要となり、ロー
タは円滑に回転する。而して、ステータが耐熱、耐蝕、
耐摩耗性の大きなセラミックスであるため、摩耗や損傷
を生ずる虞れがなく、圧送流体中への摩耗片の混入が防
止され、長時間の運転が可能である。In this invention, the stator is molded with high precision by the ceramics transferring the smooth surface of the inner mold, so there is no need to grind the inner surface of the stator after sintering, and the rotor rotates smoothly. Therefore, the stator is heat resistant, corrosion resistant,
Since it is made of highly wear-resistant ceramic, there is no risk of wear or damage, and it prevents wear debris from entering the pumped fluid, allowing long-term operation.
以下、図面を参照してこの発明の詳細な説明する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は、この発明の一実施例である偏心ねじポンプの
縦断面図、第２図は、第１図のｎ−ｎ線断面図であり、
このポンプは、駆動部１．吸込部２、ポンプ部３及び吐
出部４で構成されている。FIG. 1 is a longitudinal sectional view of an eccentric screw pump which is an embodiment of the present invention, and FIG. 2 is a sectional view taken along line nn in FIG. 1.
This pump has a driving part 1. It is composed of a suction section 2, a pump section 3, and a discharge section 4.
駆動部１には、駆動軸５が支承されており、駆動軸５は
、図示しないモータにより回転が与えら 。A drive shaft 5 is supported in the drive section 1, and the drive shaft 5 is rotated by a motor (not shown).
れる。ポンプ部３には、第２図に示すように、円形断面
の中心０が回転軸心Ｒに対して所定距離ｅだけ偏心した
雄ねじ状ロータ６が、半円状部分７ａ、７ｂと直線状部
分７ｃ、７ｄとよりな□る長円形断面を有しピッチがロ
ータ６のピッチの２倍である雌ねじ状の内面７を形成し
たステータ８内に、ステータの軸心Ｓとロータ６の回転
軸心Ｒとが距離ｅだけ偏心するように装着されている。It will be done. As shown in FIG. 2, the pump part 3 includes a male threaded rotor 6 whose center 0 of its circular cross section is eccentric by a predetermined distance e with respect to the rotational axis R, which has semicircular parts 7a and 7b and a straight part. The stator 8 has an internally threaded inner surface 7 having an oval cross section with a pitch twice that of the rotor 6, and has an elliptical cross-section 7c and 7d. R is mounted so that it is eccentric by a distance e.
吸込部２は、ポンプ部３と駆動部１とを接続するハウジ
ング９に吸込口１０を設けたものであり、内部には、両
端がそれぞれ自在継手１１．１２で駆動軸５とロータ６
とに連結される中間軸１３が設けられている。The suction part 2 has a suction port 10 in a housing 9 that connects the pump part 3 and the drive part 1, and inside, the drive shaft 5 and the rotor 6 are connected to each other by universal joints 11 and 12 at both ends.
An intermediate shaft 13 is provided which is connected to.
このような構成のポンプにおいて、駆動軸５に回転が与
えられると、ロータ６は回転軸心Ｒを中心として回転（
自転）する。ところが、ロータ６の断面の中心０は、回
転軸心Ｒから距離ｅだけ偏心しているに対し、ステータ
８は固定されているため、ロータ６は自由に回転できず
、ステータ８の反力を受けて、ロータ６の回転軸心Ｒが
ステータ８の軸心Ｓを中心とするロータ６の自転と逆の
方向への回転（公転）を与えられる。従って、ロータ６
の任意点における横断面は、ステータ８の雌ねじ状の内
面７の直線状部分７ｃ、？ｄで拘束されながらこの横断
面内で往復運動する。In the pump having such a configuration, when rotation is applied to the drive shaft 5, the rotor 6 rotates around the rotation axis R (
rotate). However, the center 0 of the cross section of the rotor 6 is eccentric from the rotation axis R by a distance e, whereas the stator 8 is fixed, so the rotor 6 cannot rotate freely and is subject to the reaction force of the stator 8. As a result, the rotational axis R of the rotor 6 is given rotation (revolution) about the axis S of the stator 8 in a direction opposite to the rotation of the rotor 6 . Therefore, the rotor 6
The cross section at an arbitrary point is the linear portion 7c of the internally threaded inner surface 7 of the stator 8, ? It reciprocates within this cross section while being restrained by d.
このロータ６の運動によって、吸込口１０から供給され
る流体が加圧され吐出部４から吐出されるが、このとき
、ステータ８の内面７とロータ６との隙間が大であると
リークを生じポンプの効率が低下するため、ステータ８
の内面７は複雑な形状を精度よ（成形する必要がある。Due to this movement of the rotor 6, the fluid supplied from the suction port 10 is pressurized and discharged from the discharge part 4. At this time, if the gap between the inner surface 7 of the stator 8 and the rotor 6 is large, leakage may occur. Stator 8 due to reduced pump efficiency
The inner surface 7 needs to be formed into a complex shape with high precision.
この実施例では、ステータ８は第３図に示すようなラバ
ープレス法を応用した手段で成形さ、れている。In this embodiment, the stator 8 is molded using a rubber press method as shown in FIG.
セラミックスの焼成による収縮分を予め見込んで製作さ
れた滑表面を有する中金型１４とゴム型工５との間にセ
ラミックスの粉末原料１６を入れて密封した後、高圧容
器１７内の圧力媒体である液体１８の中に入れこの液体
１８に高圧（約１００１００Ｏ／ｃｄ）をかけることに
よ、り成形する。加圧成形の後、中金型が雄ねじ形状を
有することと、セラミックスが減年時に膨張していて中
金型との間に微小間隙が生ずることを利用し、中金型を
ねじりながら抜き取る。この方法で形成すれば、均質で
粒子間のつまりがよく、焼結による変形及び収縮も小さ
く均一になるため、中金型の滑表面の形状が高い精度で
うつしとられ、内面の研削加工を行うことなく、高性能
なポンプのステータが得られた。After placing the ceramic powder raw material 16 between the rubber mold 5 and the inner mold 14 having a smooth surface, which has been manufactured in advance to account for shrinkage due to firing of the ceramic, and sealing the material, It is placed in a certain liquid 18 and molded by applying high pressure (approximately 100,100 O/cd) to this liquid 18. After pressure molding, the inner mold is removed by twisting, taking advantage of the fact that the inner mold has a male thread shape and that the ceramic expands during aging and creates a minute gap between the inner mold and the inner mold. If formed using this method, the particles will be homogeneous, with good clogging between the particles, and deformation and shrinkage due to sintering will be small and uniform, so the shape of the smooth surface of the middle mold will be transferred with high precision, and the inner surface will be easily ground. A high-performance pump stator was obtained without any additional steps.
ステータ用セラミックスの材質としては、耐摩耗性、耐
蝕性の観点から、炭化珪素、窒化珪素。From the viewpoint of wear resistance and corrosion resistance, silicon carbide and silicon nitride are recommended as materials for stator ceramics.
サイアロン、ジルコニア、アルミナ、スピネル及びムラ
イトなどのシリカ・アルミナ系のものなどが用いられる
。Silica/alumina materials such as sialon, zirconia, alumina, spinel, and mullite are used.
この実施例では、ステータの成形にラバープレス法を応
用したが、中金型の滑表面をうつしとることのできるも
のであれば他の成形法を用いても差支えない。In this embodiment, a rubber press method was applied to mold the stator, but other molding methods may be used as long as the smooth surface of the inner mold can be removed.
この発明の偏心ねじポンプは、上述の如く構成されてい
るので、ステータの内面研削加工が不要で高い効率が得
られ、溶剤、高温流体、Ｈ純性の大きい粒子等を含み流
体や腐蝕性流体の圧送に使用してもステータの摩耗や損
傷の虞れがなく、耐久性が大きく、長時間の運転が可能
である。食品圧送用としても毒性がな（、破損片の混入
も生じないので安心して使用できる。ステータ内面の機
械的な精密加工が不要であるため安価な製品を供給する
ことができる。Since the eccentric screw pump of the present invention is constructed as described above, high efficiency can be obtained without the need for internal grinding of the stator, and fluids containing solvents, high-temperature fluids, particles with high H purity, etc., and corrosive fluids There is no risk of wear or damage to the stator even when used for pressure feeding, and it is highly durable and can be operated for a long time. It is non-toxic and does not contain broken pieces, so it can be used with confidence even when used for pressure-feeding food products.It does not require precision mechanical machining of the inner surface of the stator, so it is possible to supply inexpensive products.
第１図はこの発明の一実施例である偏心ねじポンプの縦
断面図、第２図は第１図のｎ−ｕ線断面図、第３図はス
テータの成形の説明図である。
図中、１は駆動部、２は吸込部、３はポンプ部、４は吐
出部、６はロータ、７はステータの内面、８はステータ
、１４は中金型、１５はゴム型、１６は粉末原料である
。FIG. 1 is a longitudinal cross-sectional view of an eccentric screw pump according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line nu in FIG. 1, and FIG. 3 is an explanatory view of forming the stator. In the figure, 1 is the drive part, 2 is the suction part, 3 is the pump part, 4 is the discharge part, 6 is the rotor, 7 is the inner surface of the stator, 8 is the stator, 14 is the inner mold, 15 is the rubber mold, and 16 is the It is a powder raw material.
Claims (1)
に成形し焼結したセラミックスをステータとして、その
一端に吸込部、他端に吐出部を接続し、前記ステータに
雄ねじ状ロータを装着してなる偏心ねじポンプ。The inner surface of the inner mold is formed into a female thread shape by removing the smooth surface of the inner mold, and sintered ceramic is used as a stator.A suction part is connected to one end and a discharge part is connected to the other end.A male threaded rotor is attached to the stator. Eccentric screw pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17024985A JPS6229781A (en) | 1985-08-01 | 1985-08-01 | Eccentric screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17024985A JPS6229781A (en) | 1985-08-01 | 1985-08-01 | Eccentric screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6229781A true JPS6229781A (en) | 1987-02-07 |
Family
ID=15901437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17024985A Pending JPS6229781A (en) | 1985-08-01 | 1985-08-01 | Eccentric screw pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6229781A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0254392U (en) * | 1988-10-15 | 1990-04-19 | ||
| US4990070A (en) * | 1988-05-20 | 1991-02-05 | Heishin Sobi Kabushiki Kaisha | Rotary screw pump with suction vanes at intake port |
| JPH0361185U (en) * | 1989-10-18 | 1991-06-14 | ||
| JPH03108890U (en) * | 1990-02-23 | 1991-11-08 | ||
| WO2009127831A2 (en) * | 2008-04-17 | 2009-10-22 | Advanced Interactive Materials Science Limited | Drill motor assembly |
| CN103802255A (en) * | 2014-02-28 | 2014-05-21 | 广东斯坦德流体***有限公司 | PTFE screw pump stator molding clamp and technology |
| WO2015025635A1 (en) * | 2013-08-20 | 2015-02-26 | ヘイシンテクノベルク株式会社 | Sliding member for pump and pump operation state detection system |
| CN112423924A (en) * | 2018-07-18 | 2021-02-26 | 福格申有限责任两合公司 | Rotor for eccentric screw pump and method for manufacturing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111217A (en) * | 1978-02-21 | 1979-08-31 | Toshiba Corp | Picture display device |
-
1985
- 1985-08-01 JP JP17024985A patent/JPS6229781A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111217A (en) * | 1978-02-21 | 1979-08-31 | Toshiba Corp | Picture display device |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4990070A (en) * | 1988-05-20 | 1991-02-05 | Heishin Sobi Kabushiki Kaisha | Rotary screw pump with suction vanes at intake port |
| JPH0254392U (en) * | 1988-10-15 | 1990-04-19 | ||
| JPH0361185U (en) * | 1989-10-18 | 1991-06-14 | ||
| JPH03108890U (en) * | 1990-02-23 | 1991-11-08 | ||
| EA019182B1 (en) * | 2008-04-17 | 2014-01-30 | Адвансд Интерэктив Материалз Сайнс Лимитед | Drill motor assembly |
| WO2009127831A3 (en) * | 2008-04-17 | 2010-07-29 | Advanced Interactive Materials Science Limited | Drill motor assembly |
| WO2009127831A2 (en) * | 2008-04-17 | 2009-10-22 | Advanced Interactive Materials Science Limited | Drill motor assembly |
| WO2015025635A1 (en) * | 2013-08-20 | 2015-02-26 | ヘイシンテクノベルク株式会社 | Sliding member for pump and pump operation state detection system |
| CN105473861A (en) * | 2013-08-20 | 2016-04-06 | 兵神技研股份有限公司 | Sliding member for pump and pump operation state detection system |
| US10233923B2 (en) | 2013-08-20 | 2019-03-19 | Heishin Techno Werke Ltd. | Sliding member for pump and pump operation state detection system |
| CN103802255A (en) * | 2014-02-28 | 2014-05-21 | 广东斯坦德流体***有限公司 | PTFE screw pump stator molding clamp and technology |
| CN112423924A (en) * | 2018-07-18 | 2021-02-26 | 福格申有限责任两合公司 | Rotor for eccentric screw pump and method for manufacturing the same |
| CN112423924B (en) * | 2018-07-18 | 2023-10-31 | 福格申有限责任两合公司 | Rotor for eccentric screw pump and method for manufacturing same |
| US11841016B2 (en) | 2018-07-18 | 2023-12-12 | Vogelsang Gmbh & Co Kg | Rotor for an eccentric screw pump and method for the manufacture thereof |
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