JPH04191485A - Gear pump - Google Patents
Gear pumpInfo
- Publication number
- JPH04191485A JPH04191485A JP32022590A JP32022590A JPH04191485A JP H04191485 A JPH04191485 A JP H04191485A JP 32022590 A JP32022590 A JP 32022590A JP 32022590 A JP32022590 A JP 32022590A JP H04191485 A JPH04191485 A JP H04191485A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- intermediate bearing
- fluid
- bearing
- gears
- 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.)
- Granted
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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/001—Pumps for particular liquids
- F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野〕
本発明は、複数対の流体搬送用ギヤを備えると共に、そ
の搬送流体により各ギヤの軸受部が潤滑されるギヤポン
プに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a gear pump that includes a plurality of pairs of fluid conveying gears and in which bearings of each gear are lubricated by the conveying fluid.
例えばタンク内の流体を複数に分配して搬送するような
場合に用いるギヤポンプとして、特開平１−２７７６９
０号公報に開示されたものかある。For example, as a gear pump used when distributing fluid in a tank to multiple parts and conveying it, JP-A-1-27769
There is one disclosed in Publication No. 0.
このギヤポンプは、ケーシングの内部に複数対のギヤが
備えられ、このギヤによって搬送される流体により各ギ
ヤの軸受部が潤滑され、各ギヤの軸方向間に、軸方向移
動自在な中間軸受か配置されている。This gear pump is equipped with multiple pairs of gears inside the casing, the bearings of each gear are lubricated by the fluid conveyed by the gears, and an intermediate bearing that is movable in the axial direction is arranged between each gear in the axial direction. has been done.
このように、中間軸受を軸方向移動自在とすることで、
各対のギヤそれぞれによる流体吐出圧力に差が生じた場
合でも、その差圧によって中間軸受が軸方向移動し、ギ
ヤと中間軸受との側面間の隙間が変化し、その隙間から
のリーク量が変動することにより、各対のギヤそれぞれ
による流体吐出圧力が自動的に均一化される。In this way, by making the intermediate bearing freely movable in the axial direction,
Even if there is a difference in fluid discharge pressure between each pair of gears, the intermediate bearing moves in the axial direction due to the differential pressure, the gap between the sides of the gear and the intermediate bearing changes, and the amount of leakage from that gap increases. This variation automatically equalizes the fluid discharge pressures of each pair of gears.
上記従来のギヤポンプにおいては、ギヤと中間軸受との
側面間の隙間が小さくなったような場合には、軸受部の
潤滑流体が円滑に流れず滞留してしまい、軸受部に焼付
を生じる虞れかある。In the above-mentioned conventional gear pump, if the gap between the side surfaces of the gear and the intermediate bearing becomes small, the lubricating fluid in the bearing will not flow smoothly and will stagnate, leading to the risk of seizure in the bearing. There is.
また、搬送流体が高粘度ポリマーのようなものであって
、搬送のために加熱を行なっているような場合には、搬
送流体か軸受部分において滞留してしまうと、長時間加
熱されて熱劣化してしまうという問題もある。Additionally, if the carrier fluid is something like a high-viscosity polymer and is heated for transportation, if the carrier fluid stagnates in the bearing, it will be heated for a long time and cause thermal deterioration. There is also the problem of doing so.
本発明は、上記従来技術の問題を解決することのできる
ギヤポンプを提供す名ことを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a gear pump that can solve the problems of the prior art described above.
本発明の特徴とするところは、ケーシングの内部に複数
対のギヤが備えられ、このギヤによって搬送される流体
により各ギヤの軸受部か潤滑され、各ギヤの軸方向間に
、軸方向移動自在な中間軸受が配置されているギヤポン
プにおいて、前記中間軸受に、この中間軸受の内周側と
ケーシング内の吸入側とを連通ずるための連通孔か設け
られている点にある。A feature of the present invention is that a plurality of pairs of gears are provided inside the casing, the bearings of each gear are lubricated by the fluid conveyed by the gears, and the bearings of each gear are freely movable in the axial direction. In the gear pump in which an intermediate bearing is arranged, the intermediate bearing is provided with a communication hole for communicating the inner peripheral side of the intermediate bearing and the suction side in the casing.
本発明の構成によれば、ケーシング内の高圧側と低圧側
の圧力差により、ケーシング内の吐出側の高圧流体は、
ギヤと中間軸受との側面間の隙間を通り、中間軸受の内
周面とギヤの軸部の外周面との隙間に至り、この中間軸
受の内周側から連通孔を通って吸入側の低圧部に至る。According to the configuration of the present invention, due to the pressure difference between the high pressure side and the low pressure side inside the casing, the high pressure fluid on the discharge side inside the casing is
The low pressure on the suction side passes through the gap between the side surfaces of the gear and the intermediate bearing, reaches the gap between the inner peripheral surface of the intermediate bearing and the outer peripheral surface of the gear shaft, and passes from the inner peripheral side of the intermediate bearing through the communication hole. down to the department.
以下、図面を参照して本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図乃至第３図は、高粘性流体搬送用ギヤポンプ１で
あって、例えばポリエステル、ポリスチレン等の高分子
溶融物の移送に用いられる。このギヤポンプ１はケーシ
ング２と、このケーシング２内で相噛合する二対の流体
送り用ギヤ３．４．５．６とを備えている。1 to 3 show a gear pump 1 for conveying a high viscosity fluid, which is used for conveying melted polymers such as polyester and polystyrene. This gear pump 1 includes a casing 2 and two pairs of fluid feeding gears 3.4.5.6 that mesh with each other within the casing 2.
そのケーシング２は、筒状のケース本体７と、このケー
ス本体７の一端側にボルト８で連結される側板９と、他
端側にボルト２１て連結されるスタフィングボックスｌ
Ｏとで形成されている。また、ケース本体７には流体の
吸入路１１と一対の吐出路１２．１３とが形成されてい
る。The casing 2 includes a cylindrical case body 7, a side plate 9 connected to one end of the case body 7 with a bolt 8, and a stuffing box l connected to the other end with a bolt 21.
It is formed by O. Further, the case body 7 is formed with a fluid suction passage 11 and a pair of discharge passages 12 and 13.
第３図中上方に位置するギヤ３，５は駆動側であって、
駆動軸１５が挿通されている。この駆動軸１５とギヤ３
，５とはキー１６．１７により相対回転が規制されてい
る。なお、駆動軸１５はシール２２を介してケーシング
２の外部に突出され、その突出端か図外駆動源に連動連
結される。Gears 3 and 5 located at the top in FIG. 3 are on the drive side, and
A drive shaft 15 is inserted therethrough. This drive shaft 15 and gear 3
, 5, relative rotation is regulated by keys 16 and 17. The drive shaft 15 is protruded to the outside of the casing 2 through a seal 22, and its protruding end is operatively connected to a drive source (not shown).
第３図中下方に位置するギヤ４，６は従動側てあって、
従動軸１８が挿通されている。この従動軸１８とギヤ４
，６とはキー１９．２０により相対回転か規制されてい
る。The gears 4 and 6 located at the bottom in FIG. 3 are on the driven side,
A driven shaft 18 is inserted therethrough. This driven shaft 18 and gear 4
, 6 and relative rotation is regulated by keys 19 and 20.
そして、駆動軸１５はギヤ３．５の軸方向外方において
端部軸受２３．２４により支持されると共に、ギヤ３．
５の軸方向間において中間軸受２５により支持されてい
る。The drive shaft 15 is supported by an end bearing 23.24 axially outwardly of the gear 3.5, and the drive shaft 15 is supported by an end bearing 23.24 axially outwardly of the gear 3.5.
5 is supported by an intermediate bearing 25 in the axial direction.
また、従動軸１８はギヤ４，６の軸方向外方において端
部軸受２６．２７により支持されると共に、ギヤ４．６
の軸方向間において中間軸受２８により支持されている
。Further, the driven shaft 18 is supported by an end bearing 26.27 on the axially outer side of the gears 4, 6, and is supported by an end bearing 26.27.
is supported by an intermediate bearing 28 in the axial direction.
各軸受２３．２４．２５．２６．２７．２８はそれぞれ
筒状て、ケーシング２内に嵌合されると共に、第３図に
おいて上下に位置する軸受同志は相接合されている。Each of the bearings 23, 24, 25, 26, 27, 28 has a cylindrical shape and is fitted into the casing 2, and the bearings located above and below in FIG. 3 are joined to each other.
また、各中間軸受２５．２８は軸方向移動自在とされ、
ギヤ３．５と中間軸受２５との側面間の隙間と、ギヤ４
，６と中間軸受２８との側面間の隙間は変更可能とされ
ている。Further, each intermediate bearing 25, 28 is movable in the axial direction,
The gap between the sides of the gear 3.5 and the intermediate bearing 25 and the gear 4
, 6 and the intermediate bearing 28 can be changed.
また、ケーシング２の吸入路ｌｌ内には、その吸入路１
１の下流側を軸方向−刃側と他方側とに区画する内壁２
９が形成されている。In addition, in the suction passage ll of the casing 2, the suction passage 1
An inner wall 2 that divides the downstream side of 1 into an axial direction-blade side and the other side.
9 is formed.
そして、ギヤ３．４．５．６の歯の外周面と、ケース本
体７の内周面と、軸受２３．２４．２５．２６．２７．
２８の側面とで囲まれる空間により、一対の流体送り流
路か形成され、駆動ギヤ３．５か第１図中矢印方向に回
転駆動されることで、流体は吸入路１１から吸い込まれ
、各流体送り流路を通って各吐出路１２．１３から吐出
される。Then, the outer peripheral surface of the teeth of the gear 3.4.5.6, the inner peripheral surface of the case body 7, and the bearing 23.24.25.26.27.
A pair of fluid feed passages are formed by the space surrounded by the side surfaces of 28, and when the drive gear 3.5 is rotationally driven in the direction of the arrow in FIG. It is discharged from each discharge passage 12.13 through a fluid delivery channel.
この際、ギヤ３．４．５．６の加工誤差や、各吐出路１
２．１３に連結される配管での圧力損失の相違により、
一方の吐出路１２と他方の吐出路１３とで吐出圧力に差
か生じると、その圧力差によって中間軸受２５、２８が
軸方向移動する。この軸方向移動により、中間軸受２５
．２８と一方の対のギヤ３．４との側面隙間に対し、中
間軸受２５．２８と他方の対のギヤ５．６との側面隙間
が異なったものとなり、吐出圧力か大きい側の側面隙間
が大きくなってリーク量が増加することにより、吐出圧
力が均一化される。At this time, machining errors of gears 3, 4, 5, 6 and each discharge path 1
2.13 Due to the difference in pressure loss in the piping connected to
When a difference in discharge pressure occurs between one discharge passage 12 and the other discharge passage 13, the intermediate bearings 25 and 28 move in the axial direction due to the pressure difference. This axial movement causes the intermediate bearing 25
．． The side clearance between the intermediate bearing 25.28 and the gear 5.6 of the other pair is different from the side clearance between the intermediate bearing 25.28 and the gear 3.4 of one pair, and the side clearance of the side with the larger discharge pressure is As the leakage amount increases, the discharge pressure becomes uniform.
そして、軸１５，１８と軸受２３．２４．２５．２６．
２７．２８との内外周間の隙間、及びギヤ３．４．５．
６と軸受２３，２４、２５．２６．２７．２８との側面
間の隙間に、搬送流体か流入することにより、ギヤ３．
４．５．６の軸受部の潤滑がなされている。And shafts 15, 18 and bearings 23, 24, 25, 26.
27.28 and the gap between the inner and outer peripheries, and the gear 3.4.5.
6 and the bearings 23, 24, 25, 26, 27, and 28.
4.5.6 Bearings are lubricated.
そして、中間軸受２５．２８については、第４図乃至第
６図に示すように、ギヤ３．４．５．６との対向側面に
、吐出路１２．１３と中間軸受２５．２８の内周側とを
連通ずるように径方向溝３０が形成されている。As for the intermediate bearing 25.28, as shown in FIGS. A radial groove 30 is formed so as to communicate with the sides.
この径方向溝３０に連なって、中間軸受２５．２８の内
周面には軸方向溝３１が形成されている。この軸方向溝
３１に連なって、中間軸受２５．２８の内周面の軸方向
中央位置には、リング状の周溝３２が形成されている。Continuing with this radial groove 30, an axial groove 31 is formed on the inner peripheral surface of the intermediate bearing 25.28. Continuing with this axial groove 31, a ring-shaped circumferential groove 32 is formed at the axial center of the inner peripheral surface of the intermediate bearing 25.28.
この周溝３２に連なって、中間軸受２５．２８には、こ
の中間軸受２５．２８の内周側とケーシング２内の吐出
路１２とを連通ずるための連通孔３３が形成されている
。この連通孔３３の径外側は、前記内壁２９に形成され
た軸方向孔３４に連通されている。Continuing with this circumferential groove 32, a communication hole 33 is formed in the intermediate bearing 25.28 for communicating the inner peripheral side of the intermediate bearing 25.28 and the discharge passage 12 in the casing 2. The radially outer side of this communication hole 33 communicates with an axial hole 34 formed in the inner wall 29 .
この軸方向孔３４の両端は吸入路１１に連通されている
。Both ends of this axial hole 34 are communicated with the suction passage 11 .
これにより、吐出路１２．１３の高圧の搬送流体の一部
は、中間軸受２８の形方向溝３０、軸方向溝３１、周溝
３２、連通孔３３、軸方向孔３４を通って低圧の吸入路
１１に確実に還流する。よって、一方の吐出路１２と他
方の吐出路１３とで吐出圧力に差があって、中間軸受２
５．２８とギヤ３．４．５．６との側面間の隙間の一方
が小さくなっても、ケーシング２内の高圧側と低圧側と
の圧力差によって潤滑流体が中間軸受２５．２８の軸受
部を流動するので、その軸受部の焼付や搬送流体の滞留
による熱劣化が生じることはない。As a result, a part of the high-pressure carrier fluid in the discharge passage 12.13 passes through the shape groove 30, axial groove 31, circumferential groove 32, communication hole 33, and axial hole 34 of the intermediate bearing 28, and then passes through the low-pressure suction fluid. The water is reliably refluxed to line 11. Therefore, there is a difference in the discharge pressure between one discharge passage 12 and the other discharge passage 13, and the intermediate bearing 2
Even if one of the gaps between the sides of gear 3.4. Since the fluid flows through the bearing portion, thermal deterioration due to seizing of the bearing portion or stagnation of the carrier fluid does not occur.
なお、吐出路１２．１３から吸入路ｌｌに搬送流体を円
滑に還流させるためには、その還流路の上流から下流に
向かい圧力が滑らかに降下するのが好ましい。よって、
そのような圧力の降下となるように、搬送流体の粘度や
吐出圧力に応じて、連通孔３３の径を定めるのが好まし
い。In order to smoothly recirculate the carrier fluid from the discharge passages 12, 13 to the suction passages 11, it is preferable that the pressure decreases smoothly from upstream to downstream of the reflux passage. Therefore,
It is preferable to determine the diameter of the communication hole 33 according to the viscosity of the carrier fluid and the discharge pressure so as to achieve such a pressure drop.
また、本発明は上記実施例に限定されるものではない。Further, the present invention is not limited to the above embodiments.
例えば、上記実施例では二対のギヤにより流体を搬送し
たが三対以上でもよく、また、吐出路はひとつでもよい
し三つ以上であってもよい。For example, in the above embodiment, the fluid is conveyed by two pairs of gears, but three or more pairs may be used, and the number of discharge paths may be one or three or more.
本発明によるギヤポンプによれば、各対のギヤそれぞれ
の吐出圧力に差が生じても、中間軸受とギヤとの側面間
の隙間か変動することで各吐出圧力が均一化され、その
ような隙間の変動か生じても、中間軸受に連通孔が設け
られることにより、その隙間の潤滑流体はポンプケース
内の高圧側と低圧側の圧力差により、ポンプ吸込側の最
も圧力の低い部分に連絡されるようになっているのて確
実に流動し、軸受部の焼付や搬送流体の滞留による熱劣
化が生じるのを防止できる。According to the gear pump according to the present invention, even if there is a difference in the discharge pressures of each pair of gears, the discharge pressures can be made uniform by changing the gap between the sides of the intermediate bearing and the gear, and such a gap can be Even if fluctuations occur, the lubricating fluid in the gap is communicated to the lowest pressure part on the pump suction side due to the pressure difference between the high pressure side and the low pressure side in the pump case due to the communication hole provided in the intermediate bearing. This ensures reliable flow and prevents seizure of the bearing portion and thermal deterioration due to stagnation of the carrier fluid.
図面は本発明の実施例に係り、第１図はギヤポンプの断
面図、第２図は第１図のＩＩ−ＩＩ線断面図、第３図は
第１図の■−■線断面図、第４図は中間軸受の断面図、
第５図は中間軸受の一方の側面図、第６図は中間軸受の
他方の側面図で、ある。
１・・・ギヤポンプ、２・・・ケーシング、３．４．５
．６・・・ギヤ、１５・・・駆動軸、１８・・・従動軸
、２５．２８・・・中間軸受、３３・・・連通孔。The drawings relate to embodiments of the present invention, and FIG. 1 is a sectional view of a gear pump, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the Figure 4 is a cross-sectional view of the intermediate bearing.
FIG. 5 is a side view of one side of the intermediate bearing, and FIG. 6 is a side view of the other side of the intermediate bearing. 1... Gear pump, 2... Casing, 3.4.5
．． 6... Gear, 15... Drive shaft, 18... Driven shaft, 25.28... Intermediate bearing, 33... Communication hole.
Claims (1)
のギヤによって搬送される流体により各ギヤの軸受部が
潤滑され、各ギヤの軸方向間に、軸方向移動自在な中間
軸受が配置されているギヤポンプにおいて、前記中間軸
受に、この中間軸受の内周側とケーシング内の吸入側と
を連通するための連通孔が設けられていることを特徴と
するギヤポンプ。(1) A plurality of pairs of gears are provided inside the casing, the bearings of each gear are lubricated by the fluid conveyed by the gears, and an intermediate bearing that is movable in the axial direction is arranged between each gear in the axial direction. A gear pump characterized in that the intermediate bearing is provided with a communication hole for communicating between the inner peripheral side of the intermediate bearing and the suction side in the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320225A JP2536964B2 (en) | 1990-11-22 | 1990-11-22 | Gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320225A JP2536964B2 (en) | 1990-11-22 | 1990-11-22 | Gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04191485A true JPH04191485A (en) | 1992-07-09 |
| JP2536964B2 JP2536964B2 (en) | 1996-09-25 |
Family
ID=18119123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2320225A Expired - Lifetime JP2536964B2 (en) | 1990-11-22 | 1990-11-22 | Gear pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2536964B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5068301U (en) * | 1973-10-24 | 1975-06-18 | ||
| JPH01277690A (en) * | 1988-04-28 | 1989-11-08 | Shimadzu Corp | Gear pump |
-
1990
- 1990-11-22 JP JP2320225A patent/JP2536964B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5068301U (en) * | 1973-10-24 | 1975-06-18 | ||
| JPH01277690A (en) * | 1988-04-28 | 1989-11-08 | Shimadzu Corp | Gear pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2536964B2 (en) | 1996-09-25 |
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