JPH07103852B2 - Internal gear pump - Google Patents
Internal gear pumpInfo
- Publication number
- JPH07103852B2 JPH07103852B2 JP63125866A JP12586688A JPH07103852B2 JP H07103852 B2 JPH07103852 B2 JP H07103852B2 JP 63125866 A JP63125866 A JP 63125866A JP 12586688 A JP12586688 A JP 12586688A JP H07103852 B2 JPH07103852 B2 JP H07103852B2
- Authority
- JP
- Japan
- Prior art keywords
- casing
- internal gear
- cover
- oil
- oil pocket
- 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 - Fee Related
Links
- 239000000945 filler Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims 1
- 230000013011 mating Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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
- F04C2/101—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 a crescent-shaped filler element, located between the inner and outer intermeshing members
-
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、内接歯車ポンプ、特に小型内接歯車ポンプに
関する。Description: TECHNICAL FIELD The present invention relates to an internal gear pump, and particularly to a small internal gear pump.
［従来の技術］ 従来周知の内接歯車ポンプは、ケーシング、このケーシ
ング上に装着したカバー、組み立てたケーシングとカバ
ーの間に形成されたポンプ室、このポンプ室内に摺動自
在に設置された内歯歯車、前記ポンプ室内に回転自在に
設置され、外部から回転駆動されて前記内歯歯車とかみ
合い、これを駆動し、ポンプ作用を行う外歯歯車、前記
内歯歯車の摺動運動を規制する固定フイラー、前記カバ
ーに形成された吸込口に対向してケーシングの摺動面に
設けられたオイルポケツト、および前記ケーシングの吐
出口に対向して前記カバーの摺動面に設けられたオイル
ポケツトを有し、前記吸込口から油を吸い込んで吐出口
に吐出するようにしている。[Prior Art] A conventionally known internal gear pump includes a casing, a cover mounted on the casing, a pump chamber formed between the assembled casing and the cover, and an internal slidably installed inside the pump chamber. Toothed gear, which is rotatably installed in the pump chamber, is rotatably driven from the outside to engage with the internal gear, and drives the external gear to regulate the sliding motion of the external gear and the internal gear. A fixed filler, an oil pocket provided on the sliding surface of the casing facing the suction port formed on the cover, and an oil pocket provided on the sliding surface of the cover facing the discharge port of the casing. The oil is sucked from the suction port and discharged to the discharge port.
また、従来周知の別な内接歯車ポンプは、さらにケーシ
ングの吐出口に接続したオイルポケツト、および前記ケ
ーシングの前記オイルポケツトに対向してカバーに形成
されたオイルポケツトを有するものがある。Another known internal gear pump further has an oil pocket connected to the discharge port of the casing and an oil pocket formed on the cover so as to face the oil pocket of the casing.
さらに、本出願人が出願人した特願昭62−251688号に記
載のように、ポンプ室の側壁と固定フイラーとの間にあ
つて、内歯歯車が摺動するケーシングおよび／またはカ
バーの摺動面に、少なくとも１つの第２のオイルポケツ
トおよび／または圧力油を供給する導入通路を有する第
２のオイルポケツトを設けたものがある。Further, as described in Japanese Patent Application No. 62-251688 filed by the present applicant, a casing and / or a cover on which the internal gear slides is provided between the side wall of the pump chamber and the fixed filler. Some moving surfaces are provided with at least one second oil pocket and / or a second oil pocket having an introduction passage for supplying pressure oil.
［発明が解決しようとする課題］ 前記型式の従来の内接歯車ポンプにおいては、動力に対
する摺動抵抗の比率が大きく、内接歯車ポンプの全効率
が低下している。また、前記特願に記載の内接歯車ポン
プにおいても、効率は未だ満足できるものではなかつ
た。[Problems to be Solved by the Invention] In the conventional internal gear pump of the above type, the sliding resistance to power ratio is large, and the overall efficiency of the internal gear pump is reduced. Further, the internal gear pump described in the above-mentioned Japanese Patent Application has not yet been satisfactory in efficiency.
［課題を解決するための手段］ 本発明の目的は、従来の内接歯車ポンプの前記課題を解
決することである。[Means for Solving the Problems] An object of the present invention is to solve the above problems of the conventional internal gear pump.
この目的を達成するために、本発明によれば、ケーシン
グ、このケーシング上に装着したカバー、組み立てたケ
ーシングとカバーの間に形成されたポンプ室、このポン
プ室内に摺動自在に設置された内歯歯車、前記ポンプ室
内に回転自在に設置され、外部から回転駆動されて前記
内歯歯車とかみ合い、これを駆動し、ポンプ作用を行う
外歯歯車、前記内歯歯車の摺動運動を規制する固定フィ
ラー、前記カバーに形成された吸込口に対向してケーシ
ングの摺動面に設けられた第１のオイルポケット、前記
ケーシングの吐出口に対向してカバーに設けられた第１
のオイルポケット、ポンプ室の側壁と固定フィラーとの
間にあって、内歯歯車が摺動するケーシングおよびカバ
ーまたはそのいずれかの摺動面に、少なくとも１つの第
２のオイルポケットまたは圧力油を供給する導入通路を
有する第２のオイルポケットを有する内接歯車ポンプで
あって、外歯歯車が摺動するケーシングおよびカバーま
たはそのいずれかの摺動面に第３のオイルポケットまた
は圧力油を供給する導入通路を有する第３のオイルポケ
ットを設け、第３のオイルポケットが外歯歯車の駆動軸
のための軸孔のまわりを取り囲んで複数個備えられてい
ることを特徴とする内接歯車ポンプが提供される。In order to achieve this object, according to the present invention, a casing, a cover mounted on the casing, a pump chamber formed between the assembled casing and the cover, and an interior slidably installed in the pump chamber. Toothed gear, which is rotatably installed in the pump chamber, is rotatably driven from the outside to engage with the internal gear, and drives the external gear to regulate the sliding motion of the external gear and the internal gear. A fixed filler, a first oil pocket provided on the sliding surface of the casing facing the suction port formed on the cover, and a first oil pocket provided on the cover facing the discharge port of the casing.
Of at least one second oil pocket or pressure oil between the oil pocket, the side wall of the pump chamber and the fixed filler, and the casing and / or the sliding surface on which the internal gear slides. An internal gear pump having a second oil pocket having an introduction passage, which supplies a third oil pocket or pressure oil to a casing and / or a sliding surface thereof on which an external gear slides. Provided is an internal gear pump, wherein a third oil pocket having a passage is provided, and a plurality of third oil pockets are provided so as to surround a shaft hole for a drive shaft of an external gear. To be done.
［実施例］ 第１図から第５図を参照すると、本発明の一実施例によ
る内接歯車ポンプ10が示され、この内接歯車ポンプ10
は、円柱形状のケーシング１、内歯歯車２、駆動軸６に
固着された外歯歯車３および円柱形状のカバー４を含
む。ケーシング１は、カバー４との合わせ面1aにノツク
ピン12を植設すると共に、凹所７、吐出口９、ノツク孔
13、ねじ付き盲孔14および貫通孔15を形成されている。
円筒形状の凹所７は、側壁7aと底面7bを有し、カバー４
の合わせ面4aと共にポンプ室を画成する。このポンプ室
は、以下に述べるように内歯歯車２と外歯歯車３を噛み
合わせた状態で収容する。ケーシング１の凹所７は、そ
の底面7bに複数個の円弧状の第１のオイルポケツト5a,5
bおよび第11図に示すようなハート形または長円形の第
２のオイルポケツト5c,5d,5eおよびを外歯歯車３が摺動
する摺動面に複数個の第３のオイルポケツト5fをそれぞ
れ一定の深さに形成すると共に固定フイラー８を底面7b
から突出させて形成している。[Embodiment] Referring to FIGS. 1 to 5, there is shown an internal gear pump 10 according to an embodiment of the present invention.
Includes a cylindrical casing 1, an internal gear 2, an external gear 3 fixed to a drive shaft 6, and a cylindrical cover 4. In the casing 1, a knock pin 12 is planted on a mating surface 1a with the cover 4, and a recess 7, a discharge port 9 and a knock hole are provided.
A threaded blind hole 14 and a through hole 15 are formed.
The cylindrical recess 7 has a side wall 7a and a bottom surface 7b, and has a cover 4
A pump chamber is defined together with the mating surface 4a. This pump chamber accommodates the internal gear 2 and the external gear 3 in a meshed state as described below. The recess 7 of the casing 1 has a plurality of arc-shaped first oil pockets 5a, 5a on its bottom surface 7b.
b and a second heart-shaped or oval second oil pocket 5c, 5d, 5e as shown in FIG. 11 and a plurality of third oil pockets 5f on the sliding surface on which the external gear 3 slides. The fixed filler 8 is formed at a constant depth and the bottom surface 7b is formed.
It is formed by protruding from.
前記凹所７は、その底面からケーシング全体を貫通した
軸孔16を形成されている。The recess 7 is formed with a shaft hole 16 penetrating the entire casing from its bottom surface.
第１図、第５図および第６図に示すように、カバー４
は、その合わせ面4aにノツクピン22を植設すると共に、
軸孔26、円弧状に延びる第１のオイルポケツト25a、ハ
ート形または長円形の第２のオイルポケツト25c,25d,25
e、外歯歯車３が摺動する摺動面に複数個の第３のオイ
ルポケツト25f、円弧状の吸込口11、ノツク孔23、一対
の取付け孔24、一対の組付け孔27を形成されている。取
付け孔24は、これを通してケーシング１のねじ付き盲孔
14にねじをねじ込むことによりケーシング１とカバー４
を一体に組み立てる。組付け孔27は、これとケーシング
１の貫通孔15にねじを通して他の機械構造物に取り付け
るようにする。円弧状の吸込口11は、第６図に示すよう
にカバー４の合わせ面4aとは反対側の底外面4bに形成さ
れた凹所4cまでカバー４を貫通している。As shown in FIGS. 1, 5, and 6, the cover 4
While planting a knock pin 22 on its mating surface 4a,
Shaft hole 26, first oil pocket 25a extending in an arc, second heart-shaped or oval second oil pocket 25c, 25d, 25
e, a plurality of third oil pockets 25f, an arc-shaped suction port 11, a knock hole 23, a pair of mounting holes 24, and a pair of mounting holes 27 are formed on the sliding surface on which the external gear 3 slides. ing. The mounting hole 24 is through which the threaded blind hole of the casing 1
Casing 1 and cover 4 by screwing screws into 14
Assemble together. The assembling hole 27 is adapted to be screwed through this and the through hole 15 of the casing 1 so as to be attached to another mechanical structure. As shown in FIG. 6, the arc-shaped suction port 11 penetrates the cover 4 up to a recess 4c formed in the outer bottom surface 4b of the cover 4 opposite to the mating surface 4a.
ケーシング１とカバー４の組み立てにおいて、形成され
たポンプ室内に内歯歯車２と外歯歯車３が収容され、駆
動軸６の両端は、カバー４の軸孔26およびケーシングの
軸孔16を貫通し、かつ外部の適当な駆動手段により回転
駆動される。内歯歯車２は、ケーシング１の固定フイラ
ー８と凹所７の側壁7aとの間で案内されて摺動するよう
にされ、この摺動運動は固定フイラー８により規制され
る。ケーシング１のノツクピン12は、カバー４のノツク
孔23に挿入され、カバー４のノツクピン22は、ケーシン
グ１のノツク孔13に挿入される。第７図を参照すると、
組立て状態におけるケーシング１の線Ａ−Ａ、内歯歯車
２の線Ｂ−Ｂ、カバー４の線Ｃ−Ｃに沿つた断面で示さ
れる。When the casing 1 and the cover 4 are assembled, the internal gear 2 and the external gear 3 are housed in the formed pump chamber, and both ends of the drive shaft 6 pass through the shaft hole 26 of the cover 4 and the shaft hole 16 of the casing. , And is driven to rotate by an appropriate external drive means. The internal gear 2 is guided to slide between the fixed filler 8 of the casing 1 and the side wall 7a of the recess 7, and this sliding movement is restricted by the fixed filler 8. The dowel pin 12 of the casing 1 is inserted into the dowel hole 23 of the cover 4, and the dowel pin 22 of the cover 4 is inserted into the dowel hole 13 of the casing 1. Referring to FIG. 7,
It is shown in a cross section taken along the line AA of the casing 1, the line BB of the internal gear 2, and the line C-C of the cover 4 in the assembled state.
作動において、外歯歯車３が外部の駆動手段により回転
駆動されると、内歯歯車２が第７図の矢印で示す方向に
回転摺動する。これにより、カバー４の吸込口11から導
入された油は、ケーシング１の凹所７の底面7bにある複
数個の円弧状の第１のオイルポケツト5a,5b、第２のオ
イルポケツト5c,5d,5eおよび複数個の第３のオイルポケ
ツト5f、またカバー４の合わせ面4aにある第１のオイル
ポケツト25a,第２のオイルポケツト25c,25d,25eおよび
複数個の第３のオイルポケツト25fに進入し、内歯歯車
２と外歯歯車３を浮上させるのに十分な圧力まで昇圧し
圧力油膜を形成する。これにより、内歯歯車２と外歯歯
車３の摺動抵抗と摩耗は大幅に減少する。そして、カバ
ー４の吸込口11から導入された油は、内歯歯車２と外歯
歯車３のかみ合い回転により第10図に示すように固定フ
イラー８の内周面と外周面に沿つて運ばれ、ケーシング
１の吐出口９から押し出される。In operation, when the external gear 3 is rotationally driven by the external drive means, the internal gear 2 rotationally slides in the direction shown by the arrow in FIG. As a result, the oil introduced from the suction port 11 of the cover 4 has a plurality of arc-shaped first oil pockets 5a, 5b and second oil pockets 5c, 5d on the bottom surface 7b of the recess 7 of the casing 1. , 5e and a plurality of third oil pockets 5f, and the first oil pocket 25a, the second oil pockets 25c, 25d, 25e and the plurality of third oil pockets 25f on the mating surface 4a of the cover 4. When it enters, the pressure of the internal gear 2 and the external gear 3 is raised to a pressure sufficient to float them and a pressure oil film is formed. As a result, the sliding resistance and wear of the internal gear 2 and the external gear 3 are greatly reduced. Then, the oil introduced from the suction port 11 of the cover 4 is carried along the inner peripheral surface and the outer peripheral surface of the fixed filler 8 by the meshing rotation of the internal gear 2 and the external gear 3, as shown in FIG. , Is extruded from the discharge port 9 of the casing 1.
第８図を参照すると、ケーシング１およびカバー４の各
オイルポケツト5a〜5e,5f,25a,25c〜25e,25fに連通して
油を供給する導入通路17が設けられている。圧力油の源
は、例えば吸入側からの圧力油でもよい。この構成にお
いて、内歯歯車２の停止時と起動時に摺動面に油膜を確
保することが可能である。Referring to FIG. 8, an introduction passage 17 for supplying oil is provided in communication with the oil pockets 5a to 5e, 5f, 25a, 25c to 25e, 25f of the casing 1 and the cover 4. The source of pressure oil may be, for example, pressure oil from the suction side. With this configuration, it is possible to secure an oil film on the sliding surface when the internal gear 2 is stopped and started.
第９図を参照すると、従来構造の内接歯車ポンプと本発
明による内接歯車ポンプの性能の比較がグラフで示され
ている。グラフの下方に、実験に供した各ポンプのポン
プ室の底面の形状が示されている。実験の条件は、吐出
圧力25kg/cm2、回転数Ｎ＝１、歯車の外径30mmであつ
た。このグラフから明らかなように、本発明による内接
歯車ポンプは、従来構造のものに比較してポンプ効率が
２倍、容積効率が若干向上している。Referring to FIG. 9, a performance comparison between an internal gear pump having a conventional structure and an internal gear pump according to the present invention is shown in a graph. At the bottom of the graph, the shape of the bottom of the pump chamber of each pump used in the experiment is shown. The experimental conditions were a discharge pressure of 25 kg / cm 2 , a rotation speed N = 1, and an outer diameter of the gear of 30 mm. As is apparent from this graph, the internal gear pump according to the present invention has twice the pump efficiency and slightly improved volumetric efficiency as compared with the conventional structure.
第12図を参照すると、第３のオイルポケツト5f,25fを設
けた場合と設けない場合における内接歯車ポンプの摺動
面の温度測定結果で示されている。この図から分かるよ
うに、摺動面の温度上昇が少なくなる。Referring to FIG. 12, there are shown temperature measurement results of the sliding surface of the internal gear pump with and without the third oil pockets 5f and 25f. As can be seen from this figure, the temperature rise on the sliding surface is reduced.
［発明の効果］ 本発明は、次のような効果を奏する。[Effects of the Invention] The present invention has the following effects.
（１） 第３のオイルポケツトをケーシングおよび（ま
たは）カバーに設けたのでポンプ効率が大幅に向上する
と共に容積効率も若干向上する。(1) Since the third oil pocket is provided on the casing and / or the cover, the pump efficiency is greatly improved and the volumetric efficiency is also slightly improved.
（２） 吸入側からの圧力油を導入するオイルポケツト
を備えた構造では、適正圧力の油が得られ、内歯歯車お
よび外歯歯車の摺動面に油膜が形成されるので摺動抵抗
と摩擦抵抗が減少する。(2) With a structure equipped with an oil pocket for introducing pressure oil from the suction side, oil of appropriate pressure can be obtained, and an oil film is formed on the sliding surfaces of the internal gear and external gear, which reduces sliding resistance. Friction resistance is reduced.
第１図は本発明の一実施例による内接歯車ポンプの分解
斜視図、第２図は第１図の内接歯車ポンプの組み立てた
状態を示す斜視図、第３図はケーシングの頂面図、第４
図はケーシングの合わせ面を示す図、第５図はカバーの
合わせ面を示す図、第６図はカバーの底面図、第７図は
第１図の内接歯車ポンプのオイルポケツトの作用を説明
する破断断面図、第８図は油を供給する導入通路17が設
けられた、内接歯車ポンプにおけるオイルポケツトの作
用を示す破断断面図、第９図は従来構造の内接歯車ポン
プと本発明の内接歯車ポンプの性能を比較したグラフ、
第10図は内歯歯車、固定フイラーおよび外歯歯車の関連
構成を示す破断図、第11図は第２のオイルポケツトの形
状を示す図、および第12図は本発明と従来例の内接歯車
ポンプの性能を示すグラフである。 図において、 １……ケーシング、 ２……内歯歯車、３……外歯歯車、 ４……カバー、 5a,5b……ケーシングの第１のオイルポケツト、 5c,5d,5e……ケーシングの第２のオイルポケツト、 5f……ケーシングの第３オイルポケツト、７……凹所、 7a……側壁、7b……底面、 ８……固定フイラー、９……吐出口、 10,10A……内接歯車ポンプ、11……吸込口、 25a……カバーの第１オイルポケツト、 25c,25d,25e……カバーの第２のオイルポケツト、 25f……カバーの第３のオイルポケツト。1 is an exploded perspective view of an internal gear pump according to an embodiment of the present invention, FIG. 2 is a perspective view showing an assembled state of the internal gear pump of FIG. 1, and FIG. 3 is a top view of a casing. , 4th
The drawing shows the mating surface of the casing, FIG. 5 shows the mating surface of the cover, FIG. 6 shows the bottom view of the cover, and FIG. 7 shows the operation of the oil pocket of the internal gear pump of FIG. 8 is a broken sectional view showing the action of an oil pocket in an internal gear pump provided with an introduction passage 17 for supplying oil, and FIG. 9 is an internal gear pump of a conventional structure and the present invention. Graph comparing the performance of internal gear pumps of
FIG. 10 is a cutaway view showing the related structures of the internal gear, the fixed filer and the external gear, FIG. 11 is a view showing the shape of the second oil pocket, and FIG. 12 is the internal contact of the present invention and the conventional example. It is a graph which shows the performance of a gear pump. In the figure, 1 ... Casing, 2 ... Internal gear, 3 ... External gear, 4 ... Cover, 5a, 5b ... First oil pocket of casing, 5c, 5d, 5e ... First of casing No. 2 oil pocket, 5f ...... 3rd oil pocket of casing, 7 ... recess, 7a ... side wall, 7b ... bottom, 8 ... fixed filler, 9 ... discharge port, 1010A ... inscribed Gear pump, 11 ... Suction port, 25a ... First oil pocket on cover, 25c, 25d, 25e ... Second oil pocket on cover, 25f ... Third oil pocket on cover.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭55−71007（ＪＰ，Ｕ) 実開 昭54−137637（ＪＰ，Ｕ) 実開 昭59−175618（ＪＰ，Ｕ) 特公 昭52−29001（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References SHO 55-71007 (JP, U) ACT 54-137637 (JP, U) ACT 59-175618 (JP, U) JP 52- 29001 (JP, B2)
Claims (1)
カバー、組み立てたケーシングとカバーの間に形成され
たポンプ室、このポンプ室内に摺動自在に設置された内
歯歯車、前記ポンプ室内に回転自在に設置され、外部か
ら回転駆動されて前記内歯歯車とかみ合い、これを駆動
し、ポンプ作用を行う外歯歯車、前記内歯歯車の摺動運
動を規制する固定フィラー、前記カバーに形成された吸
込口に対向してケーシングの摺動面に設けられた第１の
オイルポケット、前記ケーシングの吐出口に対向してカ
バーに設けられた第１のオイルポケット、ポンプ室の側
壁と固定フィラーとの間にあって、内歯歯車が摺動する
ケーシングおよびカバーまたはそのいずれかの摺動面
に、少なくとも１つの第２のオイルポケットまたは圧力
油を供給する導入通路を有する第２のオイルポケットを
有する内接歯車ポンプにおいて、 外歯歯車が摺動するケーシングおよびカバーまたはその
いずれかの摺動面に第３のオイルポケットまたは圧力油
を供給する導入通路を有する第３のオイルポケットを設
け、第３のオイルポケットが外歯歯車の駆動軸のための
軸孔のまわりを取り囲んで複数個備えられていることを
特徴とする内接歯車ポンプ。1. A casing, a cover mounted on the casing, a pump chamber formed between the assembled casing and the cover, an internal gear slidably installed in the pump chamber, and rotatable in the pump chamber. Installed on the external gear that is rotationally driven from the outside and meshes with the internal gear, and drives the external gear to perform a pumping action, a fixed filler that restricts the sliding motion of the internal gear, and the cover formed on the cover. A first oil pocket provided on the sliding surface of the casing facing the suction port, a first oil pocket provided on the cover facing the discharge port of the casing, a side wall of the pump chamber and a fixed filler. At least one second oil pocket or an introduction passage for supplying pressure oil to the casing and / or the sliding surface on which the internal gear slides, which is in between. An internal gear pump having a second oil pocket having a third oil pocket or an introduction passage for supplying pressure oil to a sliding surface of a casing and / or a cover on which an external gear slides. 3. An internal gear pump, comprising: three oil pockets; and a plurality of third oil pockets surrounding a shaft hole for a drive shaft of an external gear.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63125866A JPH07103852B2 (en) | 1988-05-25 | 1988-05-25 | Internal gear pump |
| KR1019880011045A KR930006371B1 (en) | 1987-08-31 | 1988-08-30 | Internal gear pump |
| DE3829547A DE3829547A1 (en) | 1987-10-07 | 1988-08-31 | Internal-gear pump |
| US07/552,653 US5104303A (en) | 1987-08-31 | 1990-07-16 | Internal gear pump with tapered oil pockets in sliding surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63125866A JPH07103852B2 (en) | 1988-05-25 | 1988-05-25 | Internal gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01300077A JPH01300077A (en) | 1989-12-04 |
| JPH07103852B2 true JPH07103852B2 (en) | 1995-11-08 |
Family
ID=14920876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63125866A Expired - Fee Related JPH07103852B2 (en) | 1987-08-31 | 1988-05-25 | Internal gear pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103852B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE391809B (en) * | 1975-07-09 | 1977-02-28 | Nike Hydraulik Ab | METAL SCALE FOR USE IN SATISFACTION AND DIRECTION OF DAMAGED VEHICLES IN A SO-CREATED BENCH |
| JPS54137637U (en) * | 1978-03-14 | 1979-09-25 | ||
| JPS59175618U (en) * | 1983-05-12 | 1984-11-24 | 日産自動車株式会社 | Oil pump for internal combustion engines |
-
1988
- 1988-05-25 JP JP63125866A patent/JPH07103852B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01300077A (en) | 1989-12-04 |
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