JP3239026B2 - Gear pump - Google Patents
Gear pumpInfo
- Publication number
- JP3239026B2 JP3239026B2 JP24144394A JP24144394A JP3239026B2 JP 3239026 B2 JP3239026 B2 JP 3239026B2 JP 24144394 A JP24144394 A JP 24144394A JP 24144394 A JP24144394 A JP 24144394A JP 3239026 B2 JP3239026 B2 JP 3239026B2
- Authority
- JP
- Japan
- Prior art keywords
- gears
- gear pump
- groove
- virtual
- liquid
- 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
Landscapes
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は液体を搬送するギアポン
プに関するものである。更に詳述すると、水を搬送する
逃げ溝を形成したギアポンプに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear pump for conveying a liquid. More specifically, the present invention relates to a gear pump having a relief groove for conveying water.
【0002】[0002]
【従来の技術】従来から一対のギアを噛合させ回転する
ことにより、流体を圧送するように構成されたギアポン
プが知られている。このギアポンプは、例えば冷蔵庫の
自動製氷装置などに適応されている。2. Description of the Related Art Conventionally, there is known a gear pump configured to pump a fluid by meshing and rotating a pair of gears. This gear pump is adapted to, for example, an automatic ice making device of a refrigerator.
【0003】図4はギアポンプの閉じ込み部の容積変化
と、その容積変化を逃げる逃げ溝の効果の説明図であ
る。まず、図4(d)によれば、ケース1内面を摺動回
転する1対のギア2、2が噛合するとき閉じ込み部3が
生じ、この閉じ込み部3はギア2、2の回転に伴って移
動し、閉じ込み部3に閉じ込まれた液体は搬送される。
図4(a)は閉じ込み開始点、図4(c)は閉じ込み終
了点、図4(b)はその中間の状態である。この閉じ込
みは相互の歯の接点A、Bの接動によって起るもので、
この結果、閉じ込み部3の容積vは図5に示すように、
閉じ込みを開始してから閉じ込み中間までの間において
は次第に減少し、閉じ込み中間位置で最小vminとな
り、それを過ぎると次第に増加する。つまり、回転に伴
う容積の変動がある。FIG. 4 is a view for explaining a change in volume of a closed portion of a gear pump and an effect of an escape groove for relieving the change in volume. First, according to FIG. 4 (d), the is closed portion 3 occurs when the gear 2, 2 a pair of slide and rotate the casing 1 inside surface meshes, the closed portion 3 in the rotation of the gear 2, 2 The liquid that moves with it and is closed in the closing section 3 is conveyed.
4A shows the closing start point, FIG. 4C shows the closing end point, and FIG. 4B shows the intermediate state. This closing is caused by the contact movement of the contact points A and B of the teeth.
As a result, the volume v of the closed portion 3, as shown in FIG. 5,
The confinement decreases gradually in the period from the start to the intermediate confinement, minimum v min becomes an intermediate position confinement, gradually increases past the same. That is, there is a change in the volume due to the rotation.
【0004】 水や油などの液体は加圧や減圧に対して
物体の膨縮性がないためギアポンプの閉じ込み部3の容
積が減少するときは非常な高圧となり、閉じ込み中間位
置を過ぎて逆に閉じ込み部3の容積が増加するときは真
空状態となる。このため閉じ込み容積が減少するとき、
軸動力および軸受負荷が増加する一方、閉じ込み容積が
増加し真空状態となるときは液体に溶解している気体の
蒸気圧が見かけ上低下して沸騰状態に近づき気泡を発生
する。ギアの回転に伴って、閉じ込み部3の圧力変動が
断続的に起こるので、ギアは振動し、振動に伴って騒音
を発するだけではなく、吐出圧力を不規則に脈動させ、
ポンプ寿命を短縮する原因となる。[0004] Liquid such as water or oil does not expand or contract under pressure or decompression, so that when the volume of the confined portion 3 of the gear pump is reduced, the pressure becomes extremely high and passes through a confined intermediate position. Conversely, when the volume of the confinement section 3 increases, a vacuum state is established. Therefore, when the confined volume decreases,
When the shaft power and the bearing load increase, while the confined volume increases and a vacuum state is established, the vapor pressure of the gas dissolved in the liquid apparently decreases and approaches the boiling state to generate bubbles. With the rotation of the gear, the pressure fluctuation of the closing portion 3 occurs intermittently, so that the gear vibrates and not only emits noise with the vibration, but also pulsates the discharge pressure irregularly,
This will shorten the pump life.
【0005】 この容積変動を防ぐ方法の一つとして、
閉じ込み部3の容積変動を逃がす逃げ溝をギア側面のポ
ンプケース部に設ける方法がある。すなわち、前記図5
に示した、閉じ込み部3の容積が減少する区間に対応す
る位置に、閉じ込み部3にある液体を逃がす逃げ溝4を
設けて、閉じ込み部3と逃げ溝4を連通しておけば、閉
じ込み容積が減少するさいの過剰容積△v1は逃げ溝4
を通じて吐出側に送りだされて異常な圧力上昇を起こさ
ない。中間状態を過ぎて、閉じ込み部3の容積が増加し
始めたならば、閉じ込み部3を別の逃げ溝5によって吸
込み側と通じさせれば閉じ込み膨張のさいの不足容積△
v2は吸い込み側から供給されて真空を発生しない。[0005] As one of the methods for preventing this volume fluctuation,
There is a method of providing a relief groove for releasing the volume fluctuation of the closing portion 3 in the pump case portion on the side surface of the gear. That is, FIG.
Shown in a position corresponding to the section in which the volume of the closed portion 3 is reduced, by providing the relief groove 4 to release the liquid in the closed portion 3, if communication with the groove 4 escapes closed portion 3 When the confined volume decreases, the excess volume Δv 1
To the discharge side through which no abnormal pressure rise occurs. Past the intermediate state, if the volume of the closed portion 3 began to increase, of the closed portion 3 of the confinement if Sasere communication with the suction side by another of the escape groove 5 expansion Sai lack volume △
v 2 does not generate vacuum is supplied from the suction side.
【0006】 この方法は公知であるが、従来の逃げ溝
4、5は2つのギア2、2の噛合の中心線に対して垂直
方向の線の1対のギア中心軸に近い線を一辺として吐出
口6、吸込み口7に向かって各々矩形状にケース側面に
同じ深さで溝を掘り下げて逃げ溝4、5としていた。こ
の方式では確かに閉じ込み部3の液体は逃げ溝4、5を
通って吐出側もしくは吸込み側に移動し過剰容積△v1
および不足容積△v2を構成する変動容積△vの増減を
緩和することができるが、ギアポンプの停止後モータを
逆回転させポンプ内の残水を排水するとき、この溝部に
残水が溜り易く、残水が溜まった状態で放置するとこの
溝部をはじめケース内部に腐食が生じるだけではなく、
次回使用の際、赤錆を含む水が吐出してしまう。また、
残水自身の劣化(雑菌の繁殖など)が生じ、再始動後に
吸入された水が汚染されてしまう。[0006] This method is well-known, but the conventional relief groove
Reference numerals 4 and 5 denote rectangular cases, each of which is a line perpendicular to the center line of the meshing of the two gears 2 and 2 and which is close to a pair of gear central axes as one side and faces toward the discharge port 6 and the suction port 7. Grooves were dug down to the side surfaces at the same depth to form escape grooves 4,5. In this method, the liquid in the confining portion 3 certainly moves to the discharge side or the suction side through the escape grooves 4 and 5, and the excess volume Δv 1
And the fluctuation of the variable volume Δv constituting the insufficient volume Δv 2 can be reduced. If left in a state where residual water has accumulated, not only corrosion will occur inside the case including this groove, but also
At the next use, water containing red rust will be discharged. Also,
Deterioration of the residual water itself (such as propagation of various germs) occurs, and the water inhaled after the restart is contaminated.
【0007】[0007]
【発明が解決しようとする課題】そこで本発明は、上記
実状に鑑み、溝部の形状や溝部の深さを変えることによ
り、上記残水が溜りにくくし、溝部を始めケース内部を
腐食あるいは残水の水劣化をさせないようにしようとす
るものである。In view of the above situation, the present invention makes it difficult for the residual water to collect by changing the shape of the groove and the depth of the groove. It is intended to prevent the water from deteriorating.
【0008】[0008]
【課題を解決するための手段】 本発明の請求項1のギ
アポンプは、噛合する2つのギアと、これらギアを囲繞
するケースとからなり、前記2つのギアの側面と対向す
る前記ケースの壁に圧送する液体の逃げ溝を形成したギ
アポンプにおいて、前記2つのギアの中心軸が含まれる
仮想面に対して垂直方向に延設された前記逃げ溝の前記
仮想面に並行な面で切った断面積を、前記仮想面から遠
ざかるに従い徐々に小さくし、かつ前記逃げ溝を、前記
2つのギアの接触によって形成された液体の閉じ込み部
と接触できる位置から前記閉じ込み部を形成している歯
に隣接した歯が存在する位置まで延設させたものであ
る。 According to a first aspect of the present invention, there is provided a gear pump comprising two gears meshing with each other and a case surrounding the gears. In a gear pump in which a relief groove for a liquid to be pumped is formed, a cross-sectional area of the relief groove extending in a direction perpendicular to an imaginary plane including a central axis of the two gears and cut along a plane parallel to the imaginary plane. From the virtual plane
Gradually reduce as you walk, and the relief groove,
Liquid confinement formed by the contact of two gears
Tooth forming the closed part from a position where it can come into contact with
Extending to the position where the teeth adjacent to
You.
【0009】 請求項2のギアポンプは、噛合する2つ
のギアと、これらギアを囲繞するケースとからなり、前
記2つのギアの側面と対向する前記ケースの壁に圧送す
る液体の逃げ溝を形成したギアポンプにおいて、前記2
つのギアポンプの中心軸が含まれる仮想面に対して垂直
方向に延設された前記逃げ溝の前記仮想面に平行な面で
切った断面積を、前記仮想面から近い側を大きく且つ前
記仮想面から遠い側を小さく形成し、前記逃げ溝の底部
をテーパー状に形成し、前記仮想面から近い側の前記底
部を深く形成したものである。請求項3のギアポンプ
は、前記逃げ溝を略三角形状に形成し、前記仮想面から
近い側を前記略三角形状の底辺側としたことを要旨とす
る。A gear pump according to a second aspect of the present invention includes two gears that mesh with each other and a case that surrounds the gears, and a relief groove for the liquid to be pumped is formed in a wall of the case that faces a side surface of the two gears. In the gear pump, the aforementioned 2
Perpendicular to an imaginary plane containing the center axis of one gear pump
In a plane parallel to the virtual plane of the escape groove extending in the direction
The cut cross-sectional area is formed such that the side closer to the virtual surface is larger and the side farther from the virtual surface is smaller, the bottom of the clearance groove is formed in a tapered shape, and the bottom closer to the virtual surface is formed deeper. It was done. According to a third aspect of the present invention, the relief groove is formed in a substantially triangular shape, and a side closer to the virtual surface is a bottom side of the substantially triangular shape.
【0010】 請求項4のギアポンプは、噛合する2つ
のギアと、これらギアを囲繞するケースとからなり、前
記2つのギアの側面と対向する前記ケースの壁に圧送す
る液体の逃げ溝を形成したギアポンプにおいて、前記2
つのギアポンプの中心軸が含まれる仮想面に対して垂直
方向に延設された前記逃げ溝の前記仮想面に並行な面で
切った断面積を、前記仮想面に近い側を大きく且つ前記
仮想面から遠い側を小さく形成し、かつ前記逃げ溝を、
前記2つのギアの接触によって形成された液体の閉じ込
み部と接触できる位置から上記閉じ込み部を形成してい
る歯に隣接した歯が存在する位置まで延設させている。 A gear pump according to a fourth aspect of the present invention includes two gears that mesh with each other and a case that surrounds the gears, and a relief groove for the liquid to be pumped is formed in a wall of the case that faces the side surfaces of the two gears. In the gear pump, the aforementioned 2
The cross-sectional area of the relief groove extending in a direction perpendicular to the virtual plane including the central axis of the two gear pumps, taken along a plane parallel to the virtual plane, is set such that the side closer to the virtual plane is larger and the virtual plane is larger. The side far from is formed small , and the escape groove,
Confinement of the liquid formed by the contact of the two gears
The closed part is formed from a position where it can
Extending to the position where the teeth adjacent to the teeth exist.
【0011】[0011]
【作用】ケースに掘る逃げ溝の深さもしくは容積を、ギ
アの2つの噛合中心線に対して垂直な方向のギアの2つ
の中心軸に近い所を深くもしくは広くし、吐出側もしく
は吸込み側に向かって次第に浅くもしくは小さくするこ
とにより、逃げ溝の効果を保持しながら、残水を溜りに
くすることができる。この結果、溝部を始めケース内部
を腐食させにくくあるいは水の劣化をさせにくくするこ
とができる。The depth or volume of the relief groove dug in the case is increased or decreased near the two center axes of the gear in a direction perpendicular to the two meshing center lines of the gear, on the discharge side or the suction side. By making the depth shallower or smaller gradually, the residual water can be made harder to collect while maintaining the effect of the escape groove. As a result, it is possible to make it difficult to corrode the inside of the case including the groove or to make the water hardly deteriorate.
【0012】[0012]
【実施例】図1(a)は本発明に関わるギアポンプを構
成する少なくと1つのケースのケース内平面図の一実施
例であり、図1(b)は上記平面図に一対のギアを載せ
た図である。図4と同じ作用効果を示す部材には同じ符
号を表示し、重複する説明は省く。FIG. 1A is a plan view of at least one case constituting a gear pump according to the present invention, and FIG. 1B is a plan view in which a pair of gears are mounted on the above-mentioned plan view. FIG. Members having the same functions and effects as those in FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted.
【0013】 図1において、8は一対のギアが噛合し
たさいに形成される噛合中心線であり、9は一対のギア
の中心間を結ぶ中心軸である。この中心軸9が形成する
中心線の紙面垂直方向を仮想面16とする。12、13
は仮想面16に近い方向を端面10、11として端面1
0、11から、しかも噛合中心線8を対称軸として吐出
側14および吸込み側15に向かってケース面に掘られ
た逃げ溝である。逃げ溝12、13は断面A−Aに示す
ように、端面10、11の位置で深く掘られ、吐出側1
4および吸込み側15に向かって次第に浅く形成されて
いる。In FIG. 1, reference numeral 8 denotes a meshing center line formed when a pair of gears mesh with each other, and reference numeral 9 denotes a center axis connecting the centers of the pair of gears. A direction perpendicular to the paper surface of a center line formed by the central axis 9 is defined as a virtual surface 16. 12, 13
Are the end surfaces 1 and 11 with the direction close to the virtual surface 16 as the end surfaces 10 and 11.
It is a relief groove dug in the case surface from 0, 11 and further toward the discharge side 14 and the suction side 15 with the meshing center line 8 as the axis of symmetry. The relief grooves 12, 13 are dug deep at the end faces 10, 11 as shown in section AA, and
4 and the suction side 15.
【0014】 逃げ溝12、13の容積を仮想面16に
近い端面10、11側を大きくし、仮想面16から離れ
て行くに従って次第に小さく形成しているので、仮想面
16から遠くに行くに従って残水が溜まる容積は小さく
なる。このことは残水が溜まりにくくなることを意味
し、この結果、逃げ溝12、13をはじめケース内部を
腐食させにくくあるいは水の劣化をさせにくくすること
ができる。The volume of the escape grooves 12 , 13 is increased on the end faces 10, 11 near the imaginary surface 16, and is gradually reduced as the distance from the imaginary surface 16 increases.
As the distance increases, the volume of the remaining water decreases. This means that residual water is less likely to accumulate, and as a result, it is possible to make it difficult to corrode the inside of the case including the escape grooves 12 and 13 or to make the water hardly deteriorate.
【0015】ここで端面は各種の位置を取ることが想定
されるが、図4に対照される図2において、閉じ込み開
始位置図2(a)では、逃げ溝効果があるのは増大する
閉じ込み面積に対応する図示pの範囲であり吐出側では
殆ど効果がなくなる。また、閉じ込み中間位置図2
(b)では、仮想面から形成される逃げ溝の端面は相互
の歯の接点A、Bがなす噛合中心線の垂直方向位置、図
示P、Qが限界で、これより仮想面側にくると閉じ込み
部が形成されずポンプとしての働きがなくなる。従っ
て、逃げ溝を形成する端面の位置は重要で逃げ溝効果の
ある範囲で任意設定される。これに反して、上記図2
(a)で説明したように吸込み側および吐出側では殆ど
効果がなくなるため、噛合中心線8を逃げ溝の端面から
遠ざかる方向にいくに従って逃げ溝が構成する体積を縮
小しても逃げ溝の効果を軽減することはない。Here, it is assumed that the end face takes various positions. In FIG. 2, which is contrasted with FIG. 4, the closing start position is shown in FIG. It is the range of p shown in the figure corresponding to the area of the discharge, and almost no effect is obtained on the discharge side. In addition, the closed middle position diagram 2
In (b), the end face of the escaping groove formed from the virtual surface is at the limit of the vertical position of the meshing center line formed by the contact points A and B of the mutual teeth, P and Q shown in FIG. No confining portion is formed and the function as a pump is lost. Therefore, the position of the end face forming the clearance groove is important and is arbitrarily set within a range where the clearance groove effect is present. In contrast, FIG.
As described in (a), since there is almost no effect on the suction side and the discharge side, even if the volume formed by the relief groove decreases as the meshing center line 8 moves away from the end face of the relief groove, the effect of the relief groove can be obtained. Does not mitigate.
【0016】このことは逃げ溝として従来例に示した矩
形以外に噛合中心線を逃げ溝の端面から遠ざかる方向で
縮小する各種の形状を取れることを意味する。図3はこ
の例であり、図3(a)、図3(b)、図3(c)およ
び図3(d)などに示した各種の形状をとることができ
る。これ以外にも上記に説明したように、逃げ溝の端面
から遠ざかる方向で縮小する形状であれば直線や曲線の
みから構成された形状でなくてよい。また、その断面
も、図3(e)に示す公知のケース面から同一に掘り下
げたもの以外に、図3(f)に示す、端面から吸込み側
もしくは吐出側に行くに従って次第に浅くなるテーパー
をつけた方式をとることができる。これらは上記のよう
に逃げ溝の効果を保持しながらしかも残水を減少するも
のである。This means that, in addition to the rectangular shape shown in the conventional example, the escape groove can have various shapes in which the meshing center line is reduced in a direction away from the end face of the escape groove. FIG. 3 shows this example, and can take various shapes shown in FIGS. 3 (a), 3 (b), 3 (c) and 3 (d). In addition to this, as described above, the shape does not need to include only straight lines or curves as long as the shape is reduced in a direction away from the end face of the clearance groove. Further, in addition to the same cross-section that is dug down from the known case surface shown in FIG. 3 (e), the cross-section also has a taper that gradually becomes shallower from the end face toward the suction side or the discharge side as shown in FIG. 3 (f). Can be adopted. These are to reduce the residual water while maintaining the effect of the escape groove as described above.
【0017】また、逃げ溝の容積が、前記仮想面から近
い側を大きく且つ前記仮想面から遠い側を小さく形成す
ることにより、ギアによる水の閉じ込み部の水の排水が
容易になるのは、仮想面16から見て、閉じ込み部3と
仮想面から近い側の逃げ溝が重なっており、この重なっ
た部分の逃げ溝の深さの深い方が水の排水が容易になる
ためでもある。Also, the drainage of the water at the water confined portion by the gear is facilitated by forming the escape groove with a larger volume on the side closer to the virtual surface and a smaller volume on the side farther from the virtual surface. Also, when viewed from the virtual surface 16, the closed portion 3 and the escape groove on the side closer to the virtual surface overlap, and the deeper the escape groove in the overlapped portion is, the easier the drainage of water is. .
【0018】本発明によるギアアンプは水の圧送以外に
他の液状物質の搬送にも用いることができる。例えば、
水と油の混合したエマルジョンや液状スラッジなどの搬
送にも使うことができ、この場合にも腐食の低減に効果
的に作用するものである。The gear amplifier according to the present invention can be used not only for pumping water but also for transferring other liquid substances. For example,
It can also be used to transport emulsions and liquid sludge mixed with water and oil, and in this case, it can also effectively reduce corrosion.
【0019】[0019]
【発明の効果】 以上に述べたように本発明により、従
来の逃げ溝に較べて逃げ溝残水を少なくすることができ
る。しかも、閉じ込み部の容積変動をなくすることがで
きる。この結果、ギアポンプは騒音を発しないばかりで
なく長期に亘って安定して使用できるので経済性の高い
ものとなる。As described above, according to the present invention, it is possible to reduce the residual water of the escape groove as compared with the conventional escape groove. In addition, it is possible to eliminate the volume fluctuation of the closing portion. As a result, the gear pump is intended high economic efficiency in can stably used for a long time not only does not emit noise.
【図1】図1(a)は本発明に関わるギアポンプを構成
するケース内平面図の一実施例であり、図1(b)は上
記内平面図に一対のギアを載せた図である。FIG. 1A is an embodiment of a plan view of the inside of a case constituting a gear pump according to the present invention, and FIG. 1B is a view in which a pair of gears are mounted on the inner plan view.
【図2】端面と閉じ込み開始との関係を示す図である。FIG. 2 is a diagram showing a relationship between an end face and the start of closing.
【図3】本発明に関わる他の逃げ溝の形状を示す図であ
る。FIG. 3 is a view showing the shape of another escape groove according to the present invention.
【図4】ギアポンプの閉じ込みとその圧力変化を逃げる
逃げ溝を設けた理由を説明する図である。FIG. 4 is a view for explaining the reason for providing an escape groove for closing the gear pump and escaping a pressure change thereof.
【図5】閉じ込み部分の容積変動を示す図である。FIG. 5 is a diagram showing a change in volume of a closed portion.
3 閉じ込み部 10 端面 11 端面 12 逃げ溝 13 逃げ溝 14 吐出側 15 吸込み側 16 仮想面 3 closing part 10 end face 11 end face 12 relief groove 13 relief groove 14 discharge side 15 suction side 16 virtual surface
Claims (4)
繞するケースとからなり、前記2つのギアの側面と対向
する前記ケースの壁に圧送する液体の逃げ溝を形成した
ギアポンプにおいて、前記2つのギアの中心軸が含まれ
る仮想面に対して垂直方向に延設された前記逃げ溝の前
記仮想面に平行な面で切った断面積を、前記仮想面から
遠ざかるに従い徐々に小さくし、かつ前記逃げ溝を、前
記2つのギアの接触によって形成された液体の閉じ込み
部と接触できる位置から前記閉じ込み部を形成している
歯に隣接した歯が存在する位置まで延設させたことを特
徴とするギアポンプ。1. A gear pump comprising two gears meshing with each other and a case surrounding the gears, wherein a relief groove for a liquid to be pumped is formed on a wall of the case facing a side surface of the two gears. The cross-sectional area of the relief groove extending in a direction perpendicular to the virtual plane including the central axis of the two gears, which is cut by a plane parallel to the virtual plane, is gradually reduced as the distance from the virtual plane increases, and Wherein the relief groove extends from a position where it can come into contact with a liquid confinement formed by the contact of the two gears to a position where teeth adjacent to the teeth forming the confinement exist. Characterized gear pump.
繞するケースとからなり、前記2つのギアの側面と対向
する前記ケースの壁に圧送する液体の逃げ溝を形成した
ギアポンプにおいて、前記2つのギアポンプの中心軸が
含まれる仮想面に対して垂直方向に延設された前記逃げ
溝の前記仮想面に平行な面で切った断面積を、前記仮想
面から近い側を大きく且つ前記仮想面から遠い側を小さ
く形成し、前記逃げ溝の底部をテーパー状に形成し、前
記仮想面から近い側の前記底部を深く形成したことを特
徴とするギアポンプ。Two gears wherein meshing consists of a casing which surrounds these gears, the said two gear pump to form a relief groove of the liquid pumped into the wall of the casing to the side surface facing the gear, the 2 The center axes of the two gear pumps
Said relief extending perpendicular to the included virtual plane
The cross-sectional area of the groove cut by a plane parallel to the virtual surface is formed such that the side closer to the virtual surface is larger and the side farther from the virtual surface is smaller, and the bottom of the clearance groove is formed in a tapered shape, A gear pump, wherein the bottom portion on the side close to the surface is formed deep.
仮想面から近い側を前記略三角形状の底辺側としたこと
を特徴とする請求項1記載のギアポンプ。3. The gear pump according to claim 1, wherein the clearance groove is formed in a substantially triangular shape, and a side closer to the virtual plane is a bottom side of the substantially triangular shape.
繞するケースとからなり、前記2つのギアの側面と対向
する前記ケースの壁に圧送する液体の逃げ溝を形成した
ギアポンプにおいて、前記2つのギアの中心軸が含まれ
る仮想面に対して、垂直方向に延設された前記逃げ溝の
前記仮想面に並行な面で切った断面積を前記仮想面に近
い側を大きく且つ前記仮想面から遠い側を小さく形成
し、かつ前記逃げ溝を、前記2つのギアの接触によって
形成された液体の閉じ込み部と接触できる位置から上記
閉じ込み部を形成している歯に隣接した歯が存在する位
置まで延設させたことを特徴とするギアポンプ。4. A gear pump comprising two gears meshing with each other and a case surrounding the gears, wherein a relief groove for a liquid to be pressure-fed to a wall of the case facing a side surface of the two gears is formed. The cross-sectional area of the clearance groove extending in a direction parallel to the virtual surface with respect to the virtual surface including the central axes of the two gears is larger on the side closer to the virtual surface and the virtual surface is larger. And a tooth adjacent to the tooth forming the confining portion from a position where the escape groove can contact the liquid confining portion formed by the contact of the two gears. A gear pump characterized by being extended to a position where the gear pump moves.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24144394A JP3239026B2 (en) | 1994-10-05 | 1994-10-05 | Gear pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24144394A JP3239026B2 (en) | 1994-10-05 | 1994-10-05 | Gear pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08105390A JPH08105390A (en) | 1996-04-23 |
JP3239026B2 true JP3239026B2 (en) | 2001-12-17 |
Family
ID=17074391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24144394A Expired - Lifetime JP3239026B2 (en) | 1994-10-05 | 1994-10-05 | Gear pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3239026B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006011200B4 (en) | 2006-03-10 | 2014-11-13 | Schwäbische Hüttenwerke Automotive GmbH & Co. KG | External gear pump with discharge pocket |
JP5047580B2 (en) * | 2006-10-06 | 2012-10-10 | 電気化学工業株式会社 | Gear pump |
JP5771560B2 (en) * | 2012-05-30 | 2015-09-02 | 日立アプライアンス株式会社 | Gear pump and refrigerator equipped with the same |
-
1994
- 1994-10-05 JP JP24144394A patent/JP3239026B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH08105390A (en) | 1996-04-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6123533A (en) | Cavitation-free gear pump | |
JP4545072B2 (en) | Pump rotor device | |
JP2009162221A (en) | Gear pump and bearing structure for gear pump | |
US20060216187A1 (en) | Oil pump | |
JP3239026B2 (en) | Gear pump | |
JP2006125391A (en) | Rotor structure for internal gear pump | |
US4130383A (en) | Apparatus for noise suppression in a gear pump | |
TW201447147A (en) | Gear wheel with meshing teeth | |
EP2789854B1 (en) | Fluid-pressure apparatus | |
JP4011837B2 (en) | Pump device | |
CA1103989A (en) | Geared pump | |
JP2014047751A (en) | Internal gear pump | |
JP6446961B2 (en) | Gear pump or gear motor | |
EP3284949A1 (en) | Bearing structures for gear pumps | |
JP2007064122A (en) | Internal gear pump | |
JP2009228642A (en) | Oil pump | |
EP0250550A1 (en) | Gear pump | |
JP2000009055A (en) | Gear pump | |
JP2004036586A (en) | Rotor for screw compressor | |
KR102465393B1 (en) | Pump | |
JPH08121352A (en) | Gear pump or motor | |
CN211144786U (en) | Water pump structure | |
BE1017582A3 (en) | Fluid injected screw compressor, has relief pattern on casing or rotor outlet end face for creating film seal | |
SU931959A1 (en) | Peristaltic pump | |
JP2007138923A (en) | Internal gear pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990928 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071005 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081005 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081005 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091005 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091005 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101005 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111005 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111005 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121005 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121005 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131005 Year of fee payment: 12 |
|
EXPY | Cancellation because of completion of term |