JPS62356B2 - - Google Patents
Info
- Publication number
- JPS62356B2 JPS62356B2 JP11237482A JP11237482A JPS62356B2 JP S62356 B2 JPS62356 B2 JP S62356B2 JP 11237482 A JP11237482 A JP 11237482A JP 11237482 A JP11237482 A JP 11237482A JP S62356 B2 JPS62356 B2 JP S62356B2
- Authority
- JP
- Japan
- Prior art keywords
- cover
- rear covers
- piston
- hole
- pump
- 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
Links
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
Description
【発明の詳細な説明】 本発明は歯車ポンプの改良に関する。[Detailed description of the invention] The present invention relates to improvements in gear pumps.
従来の歯車ポンプで特に高圧流体に使用される
ものでは、吐出側高圧領域の油圧により前後カバ
ーが歯車側面から離れる方向に屈曲し、そこに隙
間が生じ油洩れが生じるおそれがあつた。このた
め前後カバーとして強力な材料を使用しなければ
ならないばかりでなく、前後カバーが多少屈曲し
ても支障のないよう余分の配慮が必要であつた。 In conventional gear pumps, especially those used for high-pressure fluids, the front and rear covers are bent away from the side surfaces of the gear due to the hydraulic pressure in the high-pressure area on the discharge side, creating a gap there, which can cause oil leakage. For this reason, it is not only necessary to use a strong material for the front and rear covers, but also extra care must be taken to ensure that there is no problem even if the front and rear covers are bent to some extent.
本発明は上記問題点を除き、ポンプの性能を向
上させ精密な加工を必らずしも必要とせず、大幅
なコスト低下が可能な歯車ポンプを提供すること
を目的とする。 An object of the present invention is to eliminate the above-mentioned problems, improve the performance of the pump, and provide a gear pump that does not necessarily require precise machining and can significantly reduce costs.
以下本発明は一実施例を図面にもとずいて説明
する。 Hereinafter, one embodiment of the present invention will be explained based on the drawings.
第１図ないし第３図において、一対の互いに平
行な駆動軸１と従動軸２とに、互いに噛み合う一
対の歯車３，３が固定され、これら歯車３，３の
両側面および外周面を覆うよう前後カバー４，５
およびこれらの間にケーシング６が挾持される。
そして、前カバー４の前面に外カバー１１が配置
された状態で、前記全体がボルト７によつてポン
プ取付壁１０へ一体となつて固定されている。 1 to 3, a pair of gears 3, 3 that mesh with each other are fixed to a pair of mutually parallel driving shafts 1 and driven shafts 2, so as to cover both side surfaces and outer peripheral surfaces of these gears 3, 3. Front and rear covers 4, 5
And the casing 6 is held between them.
With the outer cover 11 disposed on the front surface of the front cover 4, the entire structure is integrally fixed to the pump mounting wall 10 with bolts 7.
しかして、前記前後カバー４，５の両方で、ポ
ンプ吐出側たる高圧領域に面した内面から外面に
貫通する圧力逃がし孔Ａが設けられている。この
孔は歯車側に位置した小径孔A1と前後カバーの
外面に開口した大径口A2とよりなる。そして大
径口A2内にはピストン８が前後カバー４，５の
厚さ方向に摺動自在に嵌挿されており、ピストン
８の歯車３側は小径とされてその外周面にパツキ
ン９が嵌挿されてシールされている。そして、カ
バーの孔Ａが開口した面は前記ポンプ取付壁１０
及び外板１１で覆われ、ピストン８の抜け止めと
流体シールが施されている。４ａ，４ｂは各々、
歯車３の側面に直交するカバー４，５の側面に開
口した吸入口および吐出口である。 Both of the front and rear covers 4, 5 are provided with pressure relief holes A penetrating from the inner surface facing the high pressure area, which is the pump discharge side, to the outer surface. This hole consists of a small diameter hole A1 located on the gear side and a large diameter hole A2 opened on the outer surface of the front and rear covers. A piston 8 is fitted into the large-diameter opening A 2 so as to be able to slide freely in the thickness direction of the front and rear covers 4 and 5, and the gear 3 side of the piston 8 has a small diameter, and a gasket 9 is attached to the outer peripheral surface of the piston 8. It is inserted and sealed. The surface where the hole A of the cover opens is the pump mounting wall 10.
It is covered with an outer plate 11 to prevent the piston 8 from coming off and to provide a fluid seal. 4a and 4b are each
These are a suction port and a discharge port that are opened on the side surfaces of the covers 4 and 5 that are perpendicular to the side surface of the gear 3.
以上において作動状態を説明する。 The operating state will be explained above.
高圧領域側の圧油は圧力逃がし孔Ａ内でピスト
ン８に作用し、ピストン８はポンプ取付壁１０及
び外板１１を押圧する。これによつて流体の圧力
は取付壁１０と外板１１に作用してこれらの力は
ボルト７によつて支えられることになる。従つて
前後カバー４，５の内面に働いてそれらを屈曲さ
せようとする力は大巾に減少される。 The pressure oil on the high pressure region side acts on the piston 8 within the pressure relief hole A, and the piston 8 presses the pump mounting wall 10 and the outer plate 11. As a result, the pressure of the fluid acts on the mounting wall 10 and the outer plate 11, and these forces are supported by the bolts 7. Therefore, the force acting on the inner surfaces of the front and rear covers 4, 5 to bend them is greatly reduced.
なお、前記孔Ａとピストン８は前後カバー４，
５のいずれか一方のみに設けられてもよい。 Note that the hole A and the piston 8 are connected to the front and rear covers 4,
5 may be provided only on either one.
本発明は以上の如くであるので、前後カバーの
内面に働く有害な屈曲力は小さくなり、このため
ポンプの性能が飛躍的に向上するとともに、カバ
ーの変形を考慮した精密な加工の必要がなく、大
巾なコスト低減が可能となつたのである。しかも
圧力逃がし孔にピストンがシールされて嵌挿され
ているので、もしポンプ取付壁又は外板とカバー
との間に隙間が生じても、ピストンのシール状態
は変化せず、常に良好なシール作用が得られると
共に、圧力逃し孔があつてもカバーの強度は殆ん
ど低下しない。 Since the present invention is as described above, the harmful bending force acting on the inner surfaces of the front and rear covers is reduced, which dramatically improves the performance of the pump, and eliminates the need for precision machining that takes into account deformation of the cover. , it became possible to significantly reduce costs. Moreover, since the piston is sealed and inserted into the pressure relief hole, even if a gap occurs between the pump mounting wall or the outer plate and the cover, the sealing condition of the piston will not change, and good sealing will always occur. is obtained, and the strength of the cover hardly decreases even if there is a pressure relief hole.
第１図は本発明の一実施例を示す縦断面図、第
２図は右側面図、第３図は第２図の―断面図
である。
１……駆動軸、２……従動軸、３……歯車、４
……前カバー、５……後カバー、６……ケーシン
グ、７……パツキン、８……ピストン、Ａ……圧
力逃がし孔、A1……小径孔、A2……大径孔。
FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 2 is a right side view, and FIG. 3 is a cross-sectional view of FIG. 2. 1... Drive shaft, 2... Driven shaft, 3... Gear, 4
...Front cover, 5...Rear cover, 6...Casing, 7...Packskin, 8...Piston, A...Pressure relief hole, A1 ...Small diameter hole, A2 ...Large diameter hole.
Claims (1)
かみ合う一対の歯車が固定され、これら歯車の両
側面および外円周面を覆うよう前後カバーおよび
これらの間にケーシングが挾持固定された歯車ポ
ンプにおいて、前記前後カバーの少なくともいず
れか一方で高圧領域に面した内面から外面に貫通
する圧力逃がし孔が設けられ、該孔にピストンが
シールされて前記カバーの厚さ方向に摺動自在に
嵌挿され、前記カバーの逃がし孔が開口した面は
ポンプ取付壁又は外板で覆われたことを特徴とす
る歯車ポンプ。1. A gear pump in which a pair of mutually meshing gears is fixed to a pair of mutually parallel driving shafts and driven shafts, and a front and rear cover and a casing are sandwiched and fixed between the front and rear covers so as to cover both side surfaces and outer circumferential surfaces of these gears. , at least one of the front and rear covers is provided with a pressure relief hole penetrating from the inner surface facing the high pressure region to the outer surface, and a piston is sealed and fitted into the hole so as to be slidable in the thickness direction of the cover. . A gear pump, wherein the surface of the cover where the escape hole is open is covered with a pump mounting wall or an outer plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11237482A JPS593188A (en) | 1982-06-28 | 1982-06-28 | Gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11237482A JPS593188A (en) | 1982-06-28 | 1982-06-28 | Gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS593188A JPS593188A (en) | 1984-01-09 |
| JPS62356B2 true JPS62356B2 (en) | 1987-01-07 |
Family
ID=14585082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11237482A Granted JPS593188A (en) | 1982-06-28 | 1982-06-28 | Gear pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS593188A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61141864A (en) * | 1984-12-14 | 1986-06-28 | Shiyoubee:Kk | Boiled egg |
| JP2010038015A (en) * | 2008-08-04 | 2010-02-18 | Yamaha Motor Hydraulic System Co Ltd | Gear pump |
-
1982
- 1982-06-28 JP JP11237482A patent/JPS593188A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS593188A (en) | 1984-01-09 |
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