JPH01147177A - Internal gear rotor for pump or motor - Google Patents

Internal gear rotor for pump or motor

Info

Publication number
JPH01147177A
JPH01147177A JP30677787A JP30677787A JPH01147177A JP H01147177 A JPH01147177 A JP H01147177A JP 30677787 A JP30677787 A JP 30677787A JP 30677787 A JP30677787 A JP 30677787A JP H01147177 A JPH01147177 A JP H01147177A
Authority
JP
Japan
Prior art keywords
rotor
rotors
internal gear
pump
metal
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
Application number
JP30677787A
Other languages
Japanese (ja)
Inventor
Aoi Sugimoto
杉本 葵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP30677787A priority Critical patent/JPH01147177A/en
Publication of JPH01147177A publication Critical patent/JPH01147177A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084Toothed wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/102Rotary-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 the two members rotating simultaneously around their respective axes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00Non-metallic inorganic materials
    • F05C2203/08Ceramics; Oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00Synthetic polymers, e.g. plastics; Rubber

Abstract

PURPOSE:To set a tip clearance between two rotors to zero and thereby improve the discharge capacity of a pump by using metal or ceramics for an inner rotor and elastically deformable resin for an outer rotor, respectively. CONSTITUTION:Two rotors 1, 2, whose tooth number difference is one each, are combined together and thereby an internal gear rotor 4, producing a pumping chamber 3 between tooth surfaces of these rotors, is constituted. The inner rotor 1 may be any mechanical works of metal as iron or the like, but a part of ferrous sintered metal is better in view of manufacturability. As for material for the outer rotor 2, acrylonitrile-butadiene-styrene (ABS) resin may be used, but an engineering plastic resistible to a temperature of more than 100 deg.C is preferable to that. With this, harmonizability in engagement is very good and, what is more, sliding resistance can be made smaller.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、低液圧ポンプ或いは低液圧モータに利用す
るのに好適な歯数差が1枚の内接歯車ロータに関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an internal gear rotor with a single tooth difference suitable for use in a low hydraulic pump or a low hydraulic motor.

〔従来の技術およびその問題点〕[Conventional technology and its problems]

トロコイド系歯車ポンプに用いる内接歯車ロータを高強
度化と加工精度向上のために樹脂で形成することは既に
考えられている。
It has already been considered that the internal gear rotor used in trochoidal gear pumps be made of resin to increase strength and improve processing accuracy.

しかしながら、従来のこの種のポンプは、内接歯車ロー
タの構成要素であるインナー、アウターの両ロータを共
に樹脂で作っているため、円滑な回転を保証する必要上
、金属性ロータの場合と同様に、インナー、アウターの
両ロータ間にチップクリアランスをいくらか設ける必要
があり、そのために、低粘度流体の場合には特に、ポン
プの吐出効率を高め難く、さらに、圧力漏れを来たすチ
ップクリアランスを可及的に小さくして吐出ロスを少な
くしようとすれば、ロータの加工精度を充分に高めなけ
ればならないと云う問題があった。
However, in conventional pumps of this type, both the inner and outer rotors, which are the components of the internal gear rotor, are made of resin, so it is necessary to ensure smooth rotation, similar to the case with metal rotors. Therefore, it is necessary to provide some tip clearance between the inner and outer rotors, which makes it difficult to increase the pump's discharge efficiency, especially when using low viscosity fluids, and furthermore, it is necessary to provide some tip clearance between the inner and outer rotors, which can cause pressure leaks. In order to reduce the discharge loss by reducing the size of the rotor, there is a problem in that the machining accuracy of the rotor must be sufficiently increased.

また、樹脂製歯車を互いに噛合せると、摺動摩耗が早期
に進行して長時間の使用に耐え得ないと云う問題もあっ
た。
Furthermore, when resin gears are meshed with each other, sliding wear progresses rapidly, resulting in a problem that the gears cannot withstand long-term use.

この発明は、これ等の問題点を無くすことを目的として
いる。
This invention aims to eliminate these problems.

〔問題点を解決するための手段〕[Means for solving problems]

この発明は、上記の問題を解決するため、インナーロー
タを金属又はセラミックで形成し、そのインナーロータ
に対して歯数差が1枚のアウターロータを弾性変形の可
能な樹脂で形成したのである。
In order to solve the above-mentioned problems, the present invention has an inner rotor made of metal or ceramic, and an outer rotor having one tooth difference with respect to the inner rotor, made of an elastically deformable resin.

〔作用〕[Effect]

金属又はセラミックのインナーロータと樹脂製アウター
ロータは、樹脂ロータ同士の噛合と違ってなじみ性が良
く、摺動抵抗が小さく抑えられ、従って、チップクリア
ランスが大きく変化することがない。
Unlike the meshing of resin rotors, the metal or ceramic inner rotor and the resin outer rotor have good conformability, and the sliding resistance is kept low, so that the chip clearance does not change significantly.

また、アウターロータが弾性変形可能で、インナーロー
タと干渉する状態になると変形によってサイズを縮める
ためロータの加工精度が多少悪くても、また、意図的に
チップクリアランスを零にしても、内接歯車ロータの円
滑な回転が保証される。
In addition, the outer rotor can be elastically deformed, and if it interferes with the inner rotor, it will shrink in size due to deformation. Smooth rotation of the rotor is guaranteed.

さらに、液漏れにつながるチップクリアランスを零に設
計できるため、5kg/cm”以下の低圧で、しかも、
水や液体燃料等のように低粘度の液体に対しても、ポン
プの吐出性能を高率に維持し得る。
Furthermore, since the tip clearance that can lead to liquid leakage can be designed to zero, the pressure can be as low as 5 kg/cm" or less.
The discharge performance of the pump can be maintained at a high rate even for low-viscosity liquids such as water and liquid fuel.

〔実施例〕〔Example〕

添付図に、この発明の一実施例を示す。 An embodiment of the invention is shown in the accompanying drawings.

図の1はインナーロータ、2はアウターロータで、歯数
差が1枚のこの2つのロータ1.2を組合せて両ロータ
の歯面間にポンピングチャンバ3を作る内接歯車ロータ
4が構成されている。5は、内接歯車ロータ4を収納し
たポンプハウジング、6はそのハウジングに設けた吸入
ポート、7は吐出ポート、8はドライブシャフトである
In the figure, 1 is an inner rotor, 2 is an outer rotor, and an internal gear rotor 4 is constructed by combining these two rotors 1.2, which have a difference in the number of teeth by one, to create a pumping chamber 3 between the tooth surfaces of both rotors. ing. 5 is a pump housing housing the internal gear rotor 4, 6 is a suction port provided in the housing, 7 is a discharge port, and 8 is a drive shaft.

上記インナーロータ1は、鉄等の金属の機械加工品でも
よいが、鉄系焼結金属の方が製作性に優れる。
The inner rotor 1 may be a machined product made of metal such as iron, but iron-based sintered metal has better manufacturability.

また、アウターロータ2の材質としては、ABS樹脂等
を用いてもよいが、それよりも100°C以上の温度に
耐えられる高温特性に優れたエンジニアリングプラスチ
ックが望ましい。
Although ABS resin or the like may be used as the material for the outer rotor 2, it is more desirable to use an engineering plastic that has excellent high-temperature properties and can withstand temperatures of 100° C. or more.

そのエンジニアリングプラスチックとして、ポリエーテ
ルサルホン系、ポリエーテルケトン系の樹脂を用い、そ
の樹脂の無強化物と、無機質フィラー、ガスファイバー
、カボーンファイバー等による強化物の各々でアウター
ロータを形成し、これをFe−2Nf −1Gの組成の
焼結金属製インナーロータとチップクリアランスを零で
組合せてテストしたところ、同じ材料の樹脂ロータ同士
の組合せでは数時間で摺動面が0.1+me以上摩耗し
て歯間シール部の隙間が拡大し、ポンプ性能が大幅に低
下したのに対し、この発明の組合せでは、歯間シール部
のシール性が保たれ、長時間の回転にも支障を来たさな
かった。
Polyether sulfone-based and polyether ketone-based resins are used as the engineering plastics, and the outer rotor is made of unreinforced resins and reinforced materials such as inorganic fillers, gas fibers, carbon fibers, etc. When tested using a combination of a sintered metal inner rotor with a composition of Fe-2Nf-1G and a tip clearance of zero, it was found that in a combination of resin rotors made of the same material, the sliding surface wore out by more than 0.1+me in a few hours. The gap between the interdental seals expanded and the pump performance decreased significantly, but with the combination of this invention, the sealing performance of the interdental seals is maintained and there is no problem even during long-term rotation. Ta.

なお、アウターロータ2に使用可能なエンジニアリング
プラスチックとしては、上に例示したもの以外にも、ポ
リイミド系、ポリアミド系、ポリエチレンテレフタレー
ト系、ポリフェニレンサルファイド系の樹脂等を挙げる
ことができる。
In addition to the above-mentioned engineering plastics, examples of engineering plastics that can be used for the outer rotor 2 include polyimide-based, polyamide-based, polyethylene terephthalate-based, and polyphenylene sulfide-based resins.

〔効果〕〔effect〕

以上のように、この発明の内接歯車ロータは、インナー
ロータに金属又はセラミックを用い、アウターロータに
は弾性変形可能な樹脂を用いたので、両ロータ間のチッ
プクリアランスを零にしてポンプの吐出性能を大きく向
上させることができ、また、ロータの許容寸法誤差を大
きくして加工を容易にすることができる。
As described above, in the internal gear rotor of the present invention, the inner rotor is made of metal or ceramic, and the outer rotor is made of elastically deformable resin, so that the tip clearance between both rotors can be reduced to zero and the pump discharge can be improved. Performance can be greatly improved, and the allowable dimensional error of the rotor can be increased to facilitate processing.

さらに、樹脂ロータ同士を組合せる場合と比べてロータ
間の摺動抵抗が小さくなるため、耐久性も向上する。
Furthermore, since the sliding resistance between the rotors is reduced compared to the case where resin rotors are combined, durability is also improved.

なお、この発明の内接歯車ロータは、低粘度、低圧液体
用ポンプだけでなく、低圧液体で回転させるモータ用に
使用してもその特長が充分に生かされる。
The features of the internal gear rotor of the present invention can be fully utilized not only in pumps for low-viscosity, low-pressure liquids, but also in motors rotated by low-pressure liquids.

【図面の簡単な説明】[Brief explanation of the drawing]

添付図は、この発明に係る内接歯車ロータの一例をポン
プハウジングに組込んだ状態にして示す断面図である。 1・・・・・・インナーロータ、2・・・・・・アウタ
ーロータ、3・・・・・・ポンピングチャンバ、 4・・・・・・内接歯車ロータ、5・・・・・・ポンプ
ハウジング、6・・・・・・吸入ポート、  7・・・
・・・吐出ポート、8・・・・・・ドライブシャフト。
The attached drawing is a sectional view showing an example of the internal gear rotor according to the present invention assembled into a pump housing. 1... Inner rotor, 2... Outer rotor, 3... Pumping chamber, 4... Internal gear rotor, 5... Pump Housing, 6... Suction port, 7...
...Discharge port, 8...Drive shaft.

Claims (2)

【特許請求の範囲】[Claims] (1)インナーロータを金属又はセラミックで形成し、
そのインナーロータに対して歯数差が1枚のアウターロ
ータを弾性変形の可能な樹脂で形成したことを特徴とす
るポンプ又はモータ用内接歯車ロータ。
(1) The inner rotor is made of metal or ceramic,
An internal gear rotor for a pump or motor, characterized in that an outer rotor with a difference in the number of teeth of one tooth from the inner rotor is formed of an elastically deformable resin.
(2)上記インナーロータとアウターロータ間のチップ
クリアランスが零であることを特徴とする特許請求の範
囲第(1)項記載のポンプ又はモータ用内接歯車ロータ
(2) The internal gear rotor for a pump or motor according to claim (1), wherein the tip clearance between the inner rotor and the outer rotor is zero.
JP30677787A 1987-12-03 1987-12-03 Internal gear rotor for pump or motor Pending JPH01147177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30677787A JPH01147177A (en) 1987-12-03 1987-12-03 Internal gear rotor for pump or motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30677787A JPH01147177A (en) 1987-12-03 1987-12-03 Internal gear rotor for pump or motor

Publications (1)

Publication Number Publication Date
JPH01147177A true JPH01147177A (en) 1989-06-08

Family

ID=17961143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30677787A Pending JPH01147177A (en) 1987-12-03 1987-12-03 Internal gear rotor for pump or motor

Country Status (1)

Country Link
JP (1) JPH01147177A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618171A (en) * 1994-01-21 1997-04-08 Cerasiv Gmbh Innovatives-Keramik-Engineering Supply unit with a ceramic internal gear pump
EP0987437A1 (en) * 1998-09-15 2000-03-22 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Internal gear pump
DE19961401A1 (en) * 1999-12-20 2001-07-05 Danfoss Fluid Power As Nordbor Hydraulic machine
US6715847B2 (en) * 2001-01-25 2004-04-06 Denso Corporation Rotary pump with higher discharge pressure and brake apparatus having same
WO2007004503A1 (en) * 2005-06-30 2007-01-11 Hitachi, Ltd. Internal gear type pump with built-in motor and electronic device
US20100266435A1 (en) * 1998-07-31 2010-10-21 The Texas A&M University System Gerotor Apparatus for a Quasi-Isothermal Brayton Cycle Engine
JP2012184764A (en) * 2011-03-03 2012-09-27 Ti Group Automotive Systems Llc Positive displacement fluid pump

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618171A (en) * 1994-01-21 1997-04-08 Cerasiv Gmbh Innovatives-Keramik-Engineering Supply unit with a ceramic internal gear pump
US8821138B2 (en) * 1998-07-31 2014-09-02 The Texas A&M University System Gerotor apparatus for a quasi-isothermal Brayton cycle engine
US20100266435A1 (en) * 1998-07-31 2010-10-21 The Texas A&M University System Gerotor Apparatus for a Quasi-Isothermal Brayton Cycle Engine
US9382872B2 (en) 1998-07-31 2016-07-05 The Texas A&M University System Gerotor apparatus for a quasi-isothermal Brayton cycle engine
EP0987437A1 (en) * 1998-09-15 2000-03-22 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Internal gear pump
DE19961401A1 (en) * 1999-12-20 2001-07-05 Danfoss Fluid Power As Nordbor Hydraulic machine
DE19961401C2 (en) * 1999-12-20 2002-06-27 Sauer Danfoss Nordborg As Nord Hydraulic machine
US6619937B2 (en) 1999-12-20 2003-09-16 Sauer-Danfoss Holding A/S Hydraulic machine
US6715847B2 (en) * 2001-01-25 2004-04-06 Denso Corporation Rotary pump with higher discharge pressure and brake apparatus having same
WO2007004503A1 (en) * 2005-06-30 2007-01-11 Hitachi, Ltd. Internal gear type pump with built-in motor and electronic device
EP2495442A3 (en) * 2011-03-03 2014-04-09 TI Group Automotive Systems, L.L.C. Internal gear pump
US8840385B2 (en) 2011-03-03 2014-09-23 Ti Group Automotive Systems, L.L.C. Positive displacement fluid pump
JP2012184764A (en) * 2011-03-03 2012-09-27 Ti Group Automotive Systems Llc Positive displacement fluid pump

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