CN105370564A - Gear pump front cover with overflow protecting function - Google Patents
Gear pump front cover with overflow protecting function Download PDFInfo
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- CN105370564A CN105370564A CN201510820601.1A CN201510820601A CN105370564A CN 105370564 A CN105370564 A CN 105370564A CN 201510820601 A CN201510820601 A CN 201510820601A CN 105370564 A CN105370564 A CN 105370564A
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- front cover
- seal
- gear pump
- cover body
- hole
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a gear pump front cover with an overflow protecting function and belongs to the technical field of gear pumps. The gear pump front cover comprises a front cover body. A framework oil seal mounting hole and a bearing mounting hole are formed in the front cover body. An oil guide hole for enabling a gear pump oil inlet to be communicated with the interior of the framework oil seal mounting hole is further formed in the front cover body. An auxiliary hole communicated with the interior of the framework oil seal mounting hole is formed in the front cover body. A one-way valve opened under preset internal pressure is mounted in the auxiliary hole. The one-way valve comprises a seal steel ball, a spring, a combined seal ring, an oil guide pipe, an oil pipe connector, the auxiliary hole and the like. When high-pressure oil is led into a sealed area formed by a framework oil seal, a driving gear, a driven gear, a floating side plate, a fixed side plate, a pump body, a W seal ring, a pressing plate and a rectangular seal ring, the high-pressure oil is led to the seal steel ball through the auxiliary hole, and therefore the spring is pushed away to achieve overflow. Through the gear pump front cover, the framework oil seal of the front cover is protected when system backpressure is too high.
Description
Technical field
The present invention relates to gear pump technical field, specifically a kind of gear pump protecgulum with flood protection feature.
Background technique
In the actual using process of gear pump, have partial feedback to be relevant protecgulum outside framework oil seal leakage of oil situation, by opening and inspecting feedback product, we find, the seal lip of protecgulum outside framework oil seal has high pressure punching to turn over phenomenon.Bearing operating mode due to gear pump be long-term at a high speed, high pressure, so lubrication guarantee working life fully must be had.Gear pump bearing lubricating oil circuit follows the fuel tank of hydraulic system to communicate by the filler opening of gear pump, due to the mounting structure of protecgulum and gear shaft, directed hydraulic oil of coming realizes axial seal (see accompanying drawing 1) by outside framework oil seal, so the pressure that protecgulum outside framework oil seal bears also reflects the back pressure situation of whole hydraulic system.But in the using process of reality, due to the blocking of fuel tank air-strainer, the existence of the faults such as system valve road fault, there is the situation that back pressure is excessive in occasional, and the maximum pressure resistance of the outside framework oil seal that we use now is substantially at about 0.3-0.5MPa, oil leakage phenomenon is turned in this protecgulum outside framework oil seal punching said before just causing.At this moment just need the oil sealing more renewed, but to change oil sealing be a very loaded down with trivial details thing.First need first to close all oil circuits, oil inlet and outlet mounting flange of dismantling, then disassembles gear pump, is pulled down the oil sealing of breaking-up by special tool, then installs new outside framework oil seal by the special tooling installing oil sealing, finally again pump is installed main frame.Due to main pinion end seamed edge and step, as directly put the scuffing of installing and being easy to cause the seal lip of outside framework oil seal without special tooling, thus leakage of oil again, change so often all need to return factory when there is such leakage of oil situation, delay the duration very much.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of gear pump protecgulum with flood protection feature, realize the protection to protecgulum outside framework oil seal by overflow pressure relief.
The present invention is achieved through the following technical solutions: a kind of gear pump protecgulum with flood protection feature, comprise front cover body, have outside framework oil seal mounting hole and bearing mounting hole in front cover body, front cover body also has the oil guiding hole inside a connection gear pump filler opening to outside framework oil seal mounting hole; Described front cover body has an auxiliary hole be communicated to inside outside framework oil seal mounting hole, described auxiliary hole is provided with the one-way valve opened under predetermined internal pressure.
It is further: described one-way valve is connected with oil connection, and the oil connection the other end is connected with oil guide pipe.
Described auxiliary hole port has internal thread, is provided with sealed steel ball, spring and bolt in side from inside to outside at auxiliary hole; Have through hole in described bolt axle center, bolt hole outer end connects described oil connection.
Between described bolt and front cover body, combined seal ring is installed.
In described outside framework oil seal mounting hole, ecto-entad is provided with outside framework oil seal A and outside framework oil seal B successively; Two needle bearings are installed in described bearing mounting hole; Two described needle bearings are arranged on driving gear and respectively from the wheel shaft of tooth.
In outside framework oil seal mounting hole, porose back-up ring is installed outside described outside framework oil seal A.
Described needle bearing is provided with fixed lateral plate and floating side plate successively near driving gear or from one end of tooth, has the deep gouge of W type at floating side plate near the side of fixed lateral plate, in the deep gouge of described W type, be provided with W seal ring.
Be provided with pressing plate between described W seal ring and floating side plate, described pressing plate has deep gouge near the one side of W seal ring, and W seal ring has near the one side of W seal ring the boss coordinating and insert in pressing plate deep gouge.
Connected by locating stud between described front cover body and the pump housing; Between front cover body and the pump housing, rectangular seal is installed.
Described rectangular seal is arranged on out in the deep gouge on the pump housing.
The invention has the beneficial effects as follows: on front cover body, individual event valve is installed, utilize the cracking pressure of one-way valve realize system back pressure excessive time relief function, thus realize protection to outside framework oil seal, avoid the loaded down with trivial details work changed outside framework oil seal and bring; The one-way sealing characteristic of sealed steel ball and spring does not affect the self-priming performance of gear oil pump yet simultaneously; Sealed steel ball, spring, oil guide pipe, oil connection are comparatively general, and structure is simple, implements more convenient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the A of Fig. 1 is to figure.
In figure: 1, front cover body; 2, hole back-up ring; 3, driving gear; 4, outside framework oil seal A; 5, outside framework oil seal B; 6, sealed steel ball; 7, spring; 8, oil connection; 9, oil guide pipe; 10, combined seal ring; 11, auxiliary hole; 12, needle bearing; 13, floating side plate; 14, W seal ring; 15, pressing plate; 16, fixed lateral plate; 17, oil guiding hole; 18, from tooth; 19, rectangular seal; 20, locating stud; 21, the pump housing.
Embodiment
Be below a specific embodiment of the present invention, existing the invention will be further described by reference to the accompanying drawings.
As depicted in figs. 1 and 2, a kind of gear pump protecgulum with flood protection feature, comprise front cover body 1, outside framework oil seal mounting hole and bearing mounting hole is had in front cover body 1, front cover body 1 also has the oil guiding hole 17 inside a connection gear pump filler opening to outside framework oil seal mounting hole, and an auxiliary hole 11 be communicated to inside outside framework oil seal mounting hole; Oil guiding hole 17 is communicated by the oil inlet hole of the pump housing oil circuit with hydraulic system, ensure that the abundant of bearing oil; Auxiliary hole 11 is provided with the one-way valve opened under predetermined internal pressure.The concrete structure of one-way valve is such, has internal thread at auxiliary hole 11 port, is provided with sealed steel ball 6, spring 7 and bolt in side from inside to outside at auxiliary hole 11; Have through hole in bolt axle center, bolt hole outer end connected pipes joint 8, oil connection 8 the other end is connected with oil guide pipe 9; Combined seal ring 10 is installed between bolt and front cover body 1.In outside framework oil seal mounting hole, ecto-entad is provided with outside framework oil seal A4 and outside framework oil seal B5 successively, be provided with the hole back-up ring 2 preventing outside framework oil seal A4 and outside framework oil seal B5 movement outside outside framework oil seal A4 in outside framework oil seal mounting hole, wherein outside framework oil seal A4 had both played the effect that dust ring is also played in secondary seal effect simultaneously.Two needle bearings, 12, two needle bearings 12 are installed in bearing mounting hole and are arranged on driving gear 3 respectively and from the wheel shaft of tooth 18.Needle bearing 12 is provided with fixed lateral plate 16 and floating side plate 13 successively near driving gear 3 or from one end of tooth 18, the deep gouge of W type is had near the side of fixed lateral plate 16 at floating side plate 13, W seal ring 14 is installed in the deep gouge of W type, driving gear and matching with floating side plate from the left side of tooth, and realize axial seal; Be provided with pressing plate 15 between W seal ring 14 and floating side plate 13, pressing plate 15 has deep gouge near the one side of W seal ring 14, and W seal ring 14 has near the one side of W seal ring 14 boss coordinating and insert in pressing plate 15 deep gouge.Connected by locating stud 20 between front cover body 1 and the pump housing 21, ensure coaxality; Rectangular seal 19 is installed between front cover body 1 and the pump housing 21, prevents radial leakage; Rectangular seal 19 is arranged on out in the deep gouge on the pump housing 21.
In the present invention auxiliary hole 11 be communicated with outside framework oil seal B5, driving gear 3, between tooth 18, floating side plate 13, fixed lateral plate 16, W seal ring 14 and pressing plate 15, the pump housing 21 and rectangular seal 19 formed sealing area; The elastic force of spring 7 makes one-way valve, and it has certain cracking pressure value.
When gear pump works, driving gear 3 drives and rotates from tooth 18, and by the cooperation of the same pump housing 21 and floating side plate 13, the fluid of M low pressure area is transported to N zone of high pressure, oil guiding hole 17 communicates with the M low pressure area of the pump housing 21 simultaneously, the oil inlet pipe of M low pressure area connected system, i.e. fuel tank and return line.When system produces higher back pressure, high pressure oil flows to outside framework oil seal A4 with driving gear 3 with from the region between tooth 18 by oil guiding hole 17, due to driving gear 3, achieve radial seal with floating side plate 13 and fixed lateral plate 16 by the cooperation of the pump housing 21, W seal ring 14 and pressing plate 15 and rectangular seal 19 from the end face of tooth 18, the high pressure oil be introduced into can only be incorporated into sealed steel ball 6 by auxiliary hole 11, then pushes spring 7 open and realizes pressure release.Can be guided to by oil guide pipe 9 by the hydraulic oil of earial drainage comparatively wakes up in destination memory; just can check system pipeline or clear up corresponding air filtering equipment timely when finding that there is fluid and overflowing; thus the protection realized outside framework oil seal A4, outside framework oil seal B5, avoid and it is changed.
Claims (10)
1. one kind has the gear pump protecgulum of flood protection feature, comprise front cover body (1), front cover body has outside framework oil seal mounting hole and bearing mounting hole in (1), front cover body (1) also has the oil guiding hole (17) inside a connection gear pump filler opening to outside framework oil seal mounting hole; It is characterized in that: described front cover body (1) has an auxiliary hole (11) be communicated to inside outside framework oil seal mounting hole, (11) are provided with the one-way valve opened under predetermined internal pressure to described auxiliary hole.
2. the gear pump protecgulum with flood protection feature according to claim 1, it is characterized in that: described one-way valve is connected with oil connection (8), oil connection (8) the other end is connected with oil guide pipe (9).
3. the gear pump protecgulum with flood protection feature according to claim 2, is characterized in that: described auxiliary hole (11) port has internal thread, is provided with sealed steel ball (6), spring (7) and bolt in side from inside to outside at auxiliary hole (11); Have through hole in described bolt axle center, bolt hole outer end connects described oil connection (8).
4. the gear pump protecgulum with flood protection feature according to claim 3, is characterized in that: be provided with combined seal ring (10) between described bolt and front cover body (1).
5. the gear pump protecgulum with flood protection feature according to claim 1, is characterized in that: in described outside framework oil seal mounting hole, ecto-entad is provided with outside framework oil seal A(4 successively) and outside framework oil seal B(5); Two needle bearings (12) are installed in described bearing mounting hole; Two described needle bearings (12) are arranged on driving gear (3) and respectively from the wheel shaft of tooth (18).
6. the gear pump protecgulum with flood protection feature according to claim 5, is characterized in that: described outside framework oil seal A(4) the outside outside framework oil seal mounting hole porose back-up ring of interior installation (2).
7. the gear pump protecgulum with flood protection feature according to claim 5 or 6; it is characterized in that: described needle bearing (12) is near driving gear (3) or be provided with fixed lateral plate (16) and floating side plate (13) successively from one end of tooth (18); have the deep gouge of W type at floating side plate (13) near the side of fixed lateral plate (16), in the deep gouge of described W type, W seal ring (14) is installed.
8. the gear pump protecgulum with flood protection feature according to claim 7; it is characterized in that: between described W seal ring (14) and floating side plate (13), pressing plate (15) is installed; described pressing plate (15) has deep gouge near the one side of W seal ring (14), and W seal ring (14) has near the one side of W seal ring (14) boss coordinating and insert in pressing plate (15) deep gouge.
9. the gear pump protecgulum with flood protection feature according to claim 1, is characterized in that: connected by locating stud (20) between described front cover body (1) and the pump housing (21); Rectangular seal (19) is installed between front cover body (1) and the pump housing (21).
10. the gear pump protecgulum with flood protection feature according to claim 9, is characterized in that: described rectangular seal (19) is arranged on out in the deep gouge on the pump housing (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510820601.1A CN105370564B (en) | 2015-11-24 | 2015-11-24 | Gear pump protecgulum with flood protection feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510820601.1A CN105370564B (en) | 2015-11-24 | 2015-11-24 | Gear pump protecgulum with flood protection feature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370564A true CN105370564A (en) | 2016-03-02 |
| CN105370564B CN105370564B (en) | 2017-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510820601.1A Active CN105370564B (en) | 2015-11-24 | 2015-11-24 | Gear pump protecgulum with flood protection feature |
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| Country | Link |
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| CN (1) | CN105370564B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018084633A1 (en) * | 2016-11-03 | 2018-05-11 | 명화공업주식회사 | Gear pump |
| CN111878387A (en) * | 2020-07-14 | 2020-11-03 | 河南航天液压气动技术有限公司 | Gear pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2202202Y (en) * | 1994-08-18 | 1995-06-28 | 济南液压泵厂 | External-engaged medium-high pressure gear pump |
| CN2210268Y (en) * | 1994-10-14 | 1995-10-18 | 西安液压件厂 | Reflux type light oil teeth pump |
| JPH07332254A (en) * | 1994-06-15 | 1995-12-22 | Shimadzu Corp | Two-throw gear pump or motor |
| CN2230833Y (en) * | 1994-12-12 | 1996-07-10 | 青州液压件厂 | Gear pump with pressure bearing inlet |
| CN201874811U (en) * | 2010-10-27 | 2011-06-22 | 阜新北鑫星液压有限公司 | Gear pump with built-in check valve |
| CN103122853A (en) * | 2013-01-11 | 2013-05-29 | 徐州科源液压股份有限公司 | High-pressure gear pump floating side plate with pressing plate |
| CN103133341A (en) * | 2013-03-13 | 2013-06-05 | 无锡英特帕普威孚液压有限责任公司 | High-pressure two-way rotary gear pump |
| CN205154616U (en) * | 2015-11-24 | 2016-04-13 | 徐州科源液压股份有限公司 | Gear pump protecgulum with overflow protect function |
-
2015
- 2015-11-24 CN CN201510820601.1A patent/CN105370564B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07332254A (en) * | 1994-06-15 | 1995-12-22 | Shimadzu Corp | Two-throw gear pump or motor |
| CN2202202Y (en) * | 1994-08-18 | 1995-06-28 | 济南液压泵厂 | External-engaged medium-high pressure gear pump |
| CN2210268Y (en) * | 1994-10-14 | 1995-10-18 | 西安液压件厂 | Reflux type light oil teeth pump |
| CN2230833Y (en) * | 1994-12-12 | 1996-07-10 | 青州液压件厂 | Gear pump with pressure bearing inlet |
| CN201874811U (en) * | 2010-10-27 | 2011-06-22 | 阜新北鑫星液压有限公司 | Gear pump with built-in check valve |
| CN103122853A (en) * | 2013-01-11 | 2013-05-29 | 徐州科源液压股份有限公司 | High-pressure gear pump floating side plate with pressing plate |
| CN103133341A (en) * | 2013-03-13 | 2013-06-05 | 无锡英特帕普威孚液压有限责任公司 | High-pressure two-way rotary gear pump |
| CN205154616U (en) * | 2015-11-24 | 2016-04-13 | 徐州科源液压股份有限公司 | Gear pump protecgulum with overflow protect function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018084633A1 (en) * | 2016-11-03 | 2018-05-11 | 명화공업주식회사 | Gear pump |
| CN111878387A (en) * | 2020-07-14 | 2020-11-03 | 河南航天液压气动技术有限公司 | Gear pump |
| CN111878387B (en) * | 2020-07-14 | 2022-08-12 | 河南航天液压气动技术有限公司 | Gear pump |
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| Publication number | Publication date |
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| CN105370564B (en) | 2017-12-05 |
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