JPH0494481A - Gear for gear pump and gear pump - Google Patents
Gear for gear pump and gear pumpInfo
- Publication number
- JPH0494481A JPH0494481A JP20955090A JP20955090A JPH0494481A JP H0494481 A JPH0494481 A JP H0494481A JP 20955090 A JP20955090 A JP 20955090A JP 20955090 A JP20955090 A JP 20955090A JP H0494481 A JPH0494481 A JP H0494481A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- gear pump
- gears
- pump
- casing
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000011247 coating layer Substances 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 238000004080 punching Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 6
- 238000010030 laminating Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000218202 Coptis Species 0.000 description 1
- 235000002991 Coptis groenlandica Nutrition 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ギヤポンプ（歯車ポンプ）用のギヤとそれを
用いたギヤポンプに係り、特に、寸法精度がきわめて高
いギヤポンプ用ギヤ及びそれを用いたギヤポンプに関す
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a gear for a gear pump (gear pump) and a gear pump using the same, and particularly to a gear for a gear pump with extremely high dimensional accuracy and a gear pump using the same. Regarding gear pumps.
［従来の技術］
ギヤポンプは、＄２図に示す如く、２個のギヤ１．２を
相互に噛み合わせてケーシング３内に設置したものであ
り、１対のギヤ１．２をその回転軸１ａ、２ａの回りに
回転させることにより流体輸送を行なわせることができ
る。５は吸入口、６は吐出口である。[Prior Art] As shown in Figure $2, a gear pump is a device in which two gears 1.2 are installed in a casing 3 in mesh with each other. , 2a, fluid transport can be performed. 5 is a suction port, and 6 is a discharge port.
このギヤポンプは、一般に高粘性流体の輸送や、比較的
圧力が高く、吐出量の少ない用途に使用されている。This gear pump is generally used for transporting highly viscous fluids and for applications where the pressure is relatively high and the discharge amount is small.
［発明が解決しようとする課題］
このギヤポンプは、前述の１対のギヤ同士の間隙、及び
、各ギヤとケーシング内壁との間隙を十分に小さくして
、圧縮特性を高めることができるｒ高い精度のギヤｊを
製造することが極めて困難である。即ち、従来のギヤは
、直方体形状の合金材料をシェバー加工又はフライス加
工することにより製造されているのであるが、通常のシ
ェバー加工又はフライス加工では寸法精度に限度がある
ために、圧縮特性はあまり低くならず、実用上の上限と
なっていた。勿論、種々の高精度研削あるいは研磨を施
せば、到達真空度が向上されるであろうが、著しくコス
ト高になり、汎用性を欠くものとなってしまう。[Problems to be Solved by the Invention] This gear pump has a high precision that can improve compression characteristics by sufficiently reducing the gaps between the pair of gears and the gaps between each gear and the inner wall of the casing. It is extremely difficult to manufacture gear j. In other words, conventional gears are manufactured by shaving or milling a rectangular parallelepiped-shaped alloy material. However, because the dimensional accuracy of normal shaving or milling is limited, the compression properties are not very good. It was not lower than that, and had become a practical upper limit. Of course, the ultimate degree of vacuum could be improved by performing various types of high-precision grinding or polishing, but this would result in a significant increase in cost and a lack of versatility.
［課題を解決するための手段］
本発明の請求項（１）のギヤポンプ用のギヤは、回転軸
心線方向の形状が平歯車形状のプレス打抜板を該軸心線
方向に複数枚積層してなることを特徴とするものである
。[Means for Solving the Problems] The gear for a gear pump according to claim (1) of the present invention is provided by laminating a plurality of press punched plates having a spur gear shape in the direction of the axis of rotation. It is characterized by:
請求項（２）のギヤは、請求項（１）のギヤにおいて、
歯面に高潤滑性のコーティング層を形成したものである
。The gear according to claim (2) is the gear according to claim (1),
A highly lubricating coating layer is formed on the tooth surface.
本発明のギヤポンプは、吸入口と吐出口とを有するケー
シング内に１対のギヤが相互に噛み合いながら各々の回
転軸心回りに回転可能に設置されたギヤポンプにおいて
、該ギヤは請求項（１）又は（２）に記載のものであり
、かつギヤの最外周面と前記ケーシングの内壁面との最
小間隔は、常時、それぞれ１０〜１５０μｍの範囲にあ
ることを特徴とするものである。The gear pump of the present invention is a gear pump in which a pair of gears are installed in a casing having an inlet port and a discharge port so as to be rotatable around each rotation axis while meshing with each other, and the gear pump is provided in claim (1). or (2), and is characterized in that the minimum distance between the outermost peripheral surface of the gear and the inner wall surface of the casing is always in the range of 10 to 150 μm.
［作用］
かかる本発明のギヤポンプ用のギヤにあっては、プレス
抜板用の金型さえ高寸法精度のものを用いれば、高寸法
精度の平歯車形状板をｉ産できる。そして、この平歯車
形状板を適当な枚数積層することにより、高寸法精度の
ギヤポンプ用のギヤが得られる。[Function] In the gear for a gear pump of the present invention, if a press punching die with high dimensional accuracy is used, spur gear-shaped plates with high dimensional accuracy can be produced. By laminating an appropriate number of spur gear-shaped plates, a gear for a gear pump with high dimensional accuracy can be obtained.
ギヤの歯面に高潤滑性のコーティング層を形成すると、
ギヤ同志の噛合が滑らかになる。When a highly lubricating coating layer is formed on the gear tooth surface,
The gears mesh smoothly.
また、前記の本発明のギヤが内設されたギヤポンプは、
ギヤの最外周面とケーシングとの間隔をかなり小さくす
ることができる精度の高いものであるので、高い圧縮特
性を容易に達成することができ、小型ギヤポンプとして
好適に使用することができる。Further, the gear pump in which the gear of the present invention is installed has the following features:
Since it is highly accurate and can considerably reduce the distance between the outermost peripheral surface of the gear and the casing, high compression characteristics can be easily achieved and it can be suitably used as a small gear pump.
［実施例コ
以下、図面を参照して本発明の実施例について詳細に説
明する。[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図（ａ）、（ｂ）は、本発明のギヤポンプ用のギヤ
の一例を示す斜視図である。FIGS. 1(a) and 1(b) are perspective views showing an example of a gear for a gear pump of the present invention.
このギヤポンプ用のギヤＩＡ、２Ａは、薄い板状の材料
をプレス打抜によって形成された適当な枚数の平歯車形
状板４を、適当な接着剤層の存在下、加圧下及び／又は
加熱下、積層してなるものである。なお、平歯車形状板
同士は、エポキシ樹脂、ポリイミド樹脂、アクリレート
系樹脂などの有機系接着剤、熱焼結性超微粒子金属（粒
子径が約１μｍ以下であり、約１００〜６００℃の温度
で焼結可能な微粒子金属）等の金属系接着剤などの、高
接着強度、高耐熱性の接着剤にて接合されている。また
、前記の平歯車形状板同士は、前述の接着剤の代わりに
、ろう付けやハンダ付けにより結合して積層しても良い
。The gears IA and 2A for this gear pump are made of an appropriate number of spur gear-shaped plates 4 formed by press punching a thin plate-shaped material, in the presence of an appropriate adhesive layer, under pressure and/or under heat. , is formed by laminating layers. In addition, the spur gear-shaped plates should be bonded together using an organic adhesive such as epoxy resin, polyimide resin, or acrylate resin, or heat-sinterable ultrafine particle metal (with a particle size of about 1 μm or less, at a temperature of about 100 to 600°C). They are bonded using an adhesive with high adhesive strength and high heat resistance, such as a metal adhesive such as sinterable fine particle metal. Furthermore, the spur gear-shaped plates may be bonded and laminated by brazing or soldering instead of using the adhesive described above.
前記の平歯車形状板を製造する場合、プレス打抜用の打
抜型として放電加工等により製作された高寸法精度のも
のを用いることにより、高寸法精度の平歯車形状板を極
めて容易に製造でき、この平歯車形状板を積層すること
により、高寸法精度のギヤポンプ用のギヤを簡単に組み
立てることができる。もちろん、平歯車形状板を積層し
た後、外周面にフラットニング、シェービングプレス、
研磨等の仕上処理を施しても良い。When manufacturing the above-mentioned spur gear shaped plate, by using a high dimensional precision punching die manufactured by electric discharge machining etc. as a punching die for press punching, it is possible to extremely easily manufacture a spur gear shaped plate with high dimensional accuracy. By stacking these spur gear shaped plates, a gear for a gear pump with high dimensional accuracy can be easily assembled. Of course, after laminating the spur gear shaped plates, flattening the outer peripheral surface, shaving press,
A finishing treatment such as polishing may be applied.
なお、このギヤを量産する場合には、１組の打抜型から
多数枚の平歯車形状板を製造することができるので、ギ
ヤ１個当りの金型コストも大幅に低減される。In addition, when mass producing this gear, a large number of spur gear shaped plates can be manufactured from one set of punching dies, so the mold cost per gear is also significantly reduced.
本発明において、平歯車形状板の厚さは、０、Ｏｌ〜、
３．５ｍｍ、特に０．０５〜２．０ｍｍ、さらに０．１
〜１．５ｍｍ程度であることが好ましい。In the present invention, the thickness of the spur gear shaped plate is 0, Ol~,
3.5mm, especially 0.05-2.0mm, even 0.1
It is preferable that it is about 1.5 mm.
平歯車形状板の材質としては、耐熱性合成樹脂、アルミ
ニウム系合金、鉄系合金などを挙げることができ、具体
的には、みがｔ！錆鋼板リードフレーム用材料の金糸合
金などを好適に挙げることができる。Examples of the material for the spur gear shaped plate include heat-resistant synthetic resin, aluminum alloy, iron alloy, etc. Specifically, Migat! Preferred examples include gold thread alloy, which is a material for rusted steel plate lead frames.
本発明のギヤの好適な歯先形状は特に限定されるもので
はないが、例えば、好適な平歯車形状のギヤとしては第
３図に示すギヤを挙げることができる。Although the preferred shape of the tooth tips of the gear of the present invention is not particularly limited, for example, the gear shown in FIG. 3 can be mentioned as a preferred spur gear shape gear.
第３図のギヤにおいて、歯の先端側は、楕円の約１／３
の部分の曲線となっており、歯車の谷の部分はこの楕円
の先端部の包絡線と概略一致するような凹部を形成して
いる。In the gear shown in Figure 3, the tip side of the tooth is approximately 1/3 of the ellipse.
The trough of the gear forms a recess that roughly matches the envelope of the tip of this ellipse.
本発明のギヤポンプは、図示はしないが、第２図に示し
たものと同様に、前述の積層型のギヤＩＡ及び２Ａの１
対が、間隔をおいて平行に設置された１対の回転軸１ａ
の回りを回転するように、吸入口５と吐出口６とを有す
るケーシング３内に内設されたものである。一方のギヤ
が駆動され、他方のギヤはこれに噛み合いながら反対方
向に回転する。流体は歯車の谷に閉じ込められ、漏洩を
最小限に保ちつつ吐出口に運ばれ、歯車の噛み合いによ
り押し出される。Although not shown in the drawings, the gear pump of the present invention is similar to that shown in FIG.
A pair of rotating shafts 1a installed parallel to each other with an interval
It is installed inside a casing 3 having an inlet 5 and an outlet 6 so as to rotate around the casing 3 . One gear is driven, and the other gear rotates in the opposite direction while meshing with it. Fluid is trapped in the valleys of the gears and transported to the outlet with minimal leakage, where it is forced out by the meshing of the gears.
このギヤ１．２の最外周面とケーシング内壁面との最小
間隔は、常時、５〜２００μｍ（好ましくは１０〜１５
０μｍ１さらに好ましくは１０〜７０μｍ）の範囲内に
なるように構成されている。The minimum distance between the outermost circumferential surface of the gear 1.2 and the inner wall surface of the casing is always 5 to 200 μm (preferably 10 to 15 μm).
0 μm1, more preferably 10 to 70 μm).
また、回転軸１ａ、２ａと直交するギヤ１．２の側面と
、ケーシング３の側壁面（回転軸１ａ、２ａと直交する
側壁面）との各間隔も小さいことが好ましく、その間隔
は５〜２００Ａｔｍ、特に１０〜７０μｍの範囲内であ
ることが好ましい。It is also preferable that the distance between the side surface of the gear 1.2 orthogonal to the rotating shafts 1a, 2a and the side wall surface of the casing 3 (the side wall surface orthogonal to the rotating shafts 1a, 2a) is small, and the distance is 5 to 5. It is preferably within the range of 200 Atm, particularly 10 to 70 μm.
なお、ギヤＩＡ、２Ａの片方又は両方の歯面に金、銀、
二硫化モリブデン、ＴｉＮ、ＢＮなどの高潤滑性物質の
コーティング層を形成すると、ギヤの噛合がきわめて滑
らかになる。In addition, one or both tooth surfaces of gears IA and 2A are coated with gold, silver,
Forming a coating layer of a highly lubricating substance such as molybdenum disulfide, TiN, or BN makes gear meshing extremely smooth.
［効果コ
以上の通り、本発明のギヤポンプ用のギヤは、極めて高
寸法精度のものである。このギヤを用いた本発明のギヤ
ポンプは、ギヤ最外周面とケーシング内壁間の間隔を著
しく小さくすることが可能であり、圧縮圧力を効果的に
高くすることができる。[Effects] As described above, the gear for the gear pump of the present invention has extremely high dimensional accuracy. The gear pump of the present invention using this gear can significantly reduce the distance between the outermost peripheral surface of the gear and the inner wall of the casing, and can effectively increase compression pressure.
ギヤの歯面に高潤滑性のコーティング層を形成すると、
ギヤの噛合が滑らかになる。When a highly lubricating coating layer is formed on the gear tooth surface,
Gear mesh becomes smoother.
また、本発明のギヤは、プレス打抜板を積層したのであ
るから、その製作も簡単に行なえ、しかも、量産するこ
とにより製作コストも相当に低減することができる。Furthermore, since the gear of the present invention is made by laminating press punched plates, it can be easily manufactured, and furthermore, the manufacturing cost can be considerably reduced by mass-producing the gear.
第１図は未発明のギヤポンプ用のギヤの一例を示す側視
図、第２図はギヤポンプの一例を示す断面図、第３図は
ギヤの平面図である。
１．２・・・ギヤ、 ３・・・ケーシング、４・・
・平歯車形状板。FIG. 1 is a side view showing an example of a gear for a gear pump that has not yet been invented, FIG. 2 is a sectional view showing an example of the gear pump, and FIG. 3 is a plan view of the gear. 1.2...Gear, 3...Casing, 4...
・Spur gear shaped plate.
Claims (3)
板を該軸心線方向に複数枚積層してなることを特徴とす
るギヤポンプ用のギヤ。(1) A gear for a gear pump, characterized in that a plurality of press punched plates each having a spur gear shape in the direction of the rotational axis are laminated in the direction of the axis.
てある請求項（１）のギヤポンプ用のギヤ。(2) The gear for a gear pump according to claim (1), wherein a highly lubricating coating layer is formed on the tooth surface of the gear.
ギヤが相互に噛み合いながら各々の回転軸心回りに回転
可能に設置されたギヤポンプにおいて、該ギヤは請求項
（１）又は（２）に記載のものであり、かつギヤの最外
周面と前記ケーシングの内壁面との最小間隔は、常時、
それぞれ１０〜１５０μｍの範囲にあることを特徴とす
るギヤポンプ。(3) A gear pump in which a pair of gears is installed in a casing having an inlet port and a discharge port so as to be rotatable around each rotation axis while meshing with each other. ), and the minimum distance between the outermost peripheral surface of the gear and the inner wall surface of the casing is always
A gear pump characterized in that each diameter is in the range of 10 to 150 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20955090A JPH0494481A (en) | 1990-08-08 | 1990-08-08 | Gear for gear pump and gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20955090A JPH0494481A (en) | 1990-08-08 | 1990-08-08 | Gear for gear pump and gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0494481A true JPH0494481A (en) | 1992-03-26 |
Family
ID=16574675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20955090A Pending JPH0494481A (en) | 1990-08-08 | 1990-08-08 | Gear for gear pump and gear pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0494481A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006070577A1 (en) * | 2004-12-28 | 2008-06-12 | 独立行政法人海洋研究開発機構 | Floating float and how to use it |
| JP2011112019A (en) * | 2009-11-30 | 2011-06-09 | Hitachi Industrial Equipment Systems Co Ltd | Method of manufacturing screw rotor, screw rotor, and water injection type screw compressor |
-
1990
- 1990-08-08 JP JP20955090A patent/JPH0494481A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006070577A1 (en) * | 2004-12-28 | 2008-06-12 | 独立行政法人海洋研究開発機構 | Floating float and how to use it |
| JP2011112019A (en) * | 2009-11-30 | 2011-06-09 | Hitachi Industrial Equipment Systems Co Ltd | Method of manufacturing screw rotor, screw rotor, and water injection type screw compressor |
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