CN103629110B - A kind of double-gear oil pump of side plate axial clearance compensation - Google Patents
A kind of double-gear oil pump of side plate axial clearance compensation Download PDFInfo
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- CN103629110B CN103629110B CN201210306026.XA CN201210306026A CN103629110B CN 103629110 B CN103629110 B CN 103629110B CN 201210306026 A CN201210306026 A CN 201210306026A CN 103629110 B CN103629110 B CN 103629110B
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- gear
- side plate
- high pressure
- driving gear
- driven gear
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Abstract
The invention discloses a kind of double-gear oil pump of side plate axial clearance compensation, comprise the pump housing, protecgulum, bonnet, described protecgulum and bonnet are individually fixed in the two ends of the described pump housing; High pressure driving gear, high pressure driven gear is provided with in the rear in lid, low pressure driving gear and low pressure driven gear is provided with in the described pump housing, described driving gear shaft and driven gear shaft are installed in the axle sleeve of protecgulum and bonnet, and the both sides of described high pressure driving gear and high pressure driven gear are provided with floating side plate.Gear oil pump of the present invention adopts floating side plate, to reach axial clearance compensation and pressure balanced object, and axial clearance compensation, axially loaded can reduce 60%, and pump not easily generates heat, and noise is little; Floating side plate has relief groove, significantly reduces the radial force of bearing, bearing load can reduce 30%, is suitable for promoting, and is desirable energy-conserving product; Long service life.
Description
Technical field
The present invention relates to gear oil pump technical field, especially relate to a kind of double-gear oil pump of side plate axial clearance compensation.
Background technique
Duplex gear pump is the one of gear pump, is to rely on the swept volume formed between the pump housing and two groups of engaging gears to change and the mobile rotary pump carried liquid or make it supercharging.There are in the pump housing of duplex gear pump two groups of gears, two groups of gears and the pump housing form two spaces sealed, be respectively suction chamber and discharge side, when pinion rotation, space (i.e. suction chamber) volume of side of being out of gear is large from little change, forms vacuum and is sucked by liquid, and liquid enters discharge side at two between cog of gear with pinion rotation, the liquid getting rid of chamber is extruded, and completes the working procedure of gear pump with this.
Existing duplex gear pump is when assembling, the relative axial position random arrangement of two driving gears of its inside, the liquid of two driving gear between cog enters in the discharge side of the pump housing simultaneously, this just makes the fluid pressure in pump housing discharge side become large instantaneously or diminish, thus make gear pump have very large discharge pulse, not only gear pump instability of flow, difficult to control, and make gear pump have sizable operating noise, the service behaviour of gear pump is not good.Again because front and rear covers, middle pump body are all ductile iron materials, fixed interval (FI) structure, although can be high temperature resistant, working pressure be not high, and the volumetric efficiency of pump is lower, and pump easily produces heating.
Therefore, the appearance of the double-gear oil pump of the side plate axial clearance compensation of low, the long service life of a kind of noise is necessary.
Summary of the invention
The present invention, for solving the problems of the technologies described above, is the double-gear oil pump providing a kind of side plate axial clearance compensation, the advantages such as noise is low, long service life that it has.
Technical problem solved by the invention realizes by the following technical solutions:
A double-gear oil pump for side plate axial clearance compensation, comprises the pump housing, protecgulum, bonnet, and described protecgulum and bonnet are individually fixed in the two ends of the described pump housing;
High pressure driving gear, high pressure driven gear is provided with in the rear in lid, low pressure driving gear and low pressure driven gear is provided with in the described pump housing, described high pressure driving gear and low pressure driving gear are separately fixed on driving gear shaft, and described high pressure driven gear and low pressure driven gear are separately fixed on driven gear shaft;
Described high pressure driving gear is meshed with high pressure driven gear, and described low pressure driving gear is meshed with low pressure driven gear;
Described driving gear shaft and driven gear shaft are installed in the axle sleeve of protecgulum and bonnet;
The both sides of described high pressure driving gear and high pressure driven gear are provided with floating side plate.
As preferred technological scheme, the middle part of the described pump housing is provided with one-way valve.
As preferred technological scheme, described floating side plate is provided with relief groove.
As preferred technological scheme, described relief groove is two.
As preferred technological scheme, described relief groove is annular groove.
As preferred technological scheme, described floating side plate is formed by ferrous based powder metallurgical die casting or metal sintering.
As preferred technological scheme, be provided with relief valve between the described pump housing and protecgulum, described relief valve is connected with control spool.
As preferred technological scheme, described axle sleeve is DU axle sleeve.
As preferred technological scheme, described bonnet and the pump housing adopt aluminum alloy material.
Working principle and operation instruction: the present invention can according to actual demand during work, and when can realize high pressure, single pump exports, and during low pressure, double pump exports.When system is by (pressure is lower than the setting of relief valve) during low load, one-way valve is opened, high-pressure gear pump and low pressure gear pump fuel feeding simultaneously, and output flow is large, and hydraulic system realizes fast feed or rollback; When system is by (pressure is higher than the setting of relief valve) during high capacity, control spool and open relief valve, the flow that low pressure gear pump exports returns the filler opening of duplex gear pump through relief valve off-load, achieve Inner eycle, thus avoids the situation that duplex gear pump inlet port inhales sky.Now closed check valve, only has high-pressure gear POF.Compared with the pump of firm discharge, this duplex system uses power of motor to save 35%.Controlling spool by installing on the front pump of duplex gear pump, realizing pump and exporting high pressure, low pressure, and when exporting high pressure, the oil absorption of pump can be improved.
The beneficial effect that the present invention has is:
(1) gear oil pump of the present invention adopts floating side plate, to reach axial clearance compensation and pressure balanced object, and axial clearance compensation, axially loaded can reduce 60%, and pump not easily generates heat, and noise is little;
(2) floating side plate has relief groove, significantly reduce the radial force of bearing, bearing load can reduce 30%, and nearly 3 times of life longer, improves the combination property of pump;
(3) compared with the pump of firm discharge, this duplex system uses power of motor to save 35%, and being suitable for promoting, is desirable energy-conserving product;
(4) gear oil pump long service life of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of double-gear oil pump of the present invention;
Fig. 2 be Fig. 1 A-A to cross-sectional view;
Fig. 3 be Fig. 1 B-B to cross-sectional view;
Fig. 4 is the structural representation of the floating side plate of double-gear oil pump of the present invention;
Picture in picture mark:
The 1-pump housing, 2-protecgulum, 3-bonnet, 4-high pressure driving gear, 5-high pressure driven gear, 6-low pressure driving gear, 7-low pressure driven gear, 8-driving gear shaft, 9-driven gear shaft, 10-axle sleeve, 11-oil outlet, 12-one-way valve, 13-control spool, 14-relief valve, 15-floating side plate, 16-relief groove, 17-oil inlet pipe.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to shown in Fig. 1-3, a kind of double-gear oil pump of side plate axial clearance compensation, comprises the pump housing 1, protecgulum 2, bonnet 3; Protecgulum 2 and bonnet 3 are individually fixed in the two ends of the pump housing 1; The pump housing 1 is provided with oil inlet pipe 17, in bonnet 3, is provided with high pressure driving gear 4, high pressure driven gear 5, in the pump housing 1, be provided with low pressure driving gear 6 and low pressure driven gear 7; High pressure driving gear 4 and low pressure driving gear 6 are separately fixed on driving gear shaft 8, and high pressure driven gear 5 and low pressure driven gear 7 are separately fixed on driven gear shaft 9; Driving gear shaft 8 and driven gear shaft 9 are installed in the axle sleeve 10 of protecgulum 2 and bonnet 3, bonnet 3 offers oil outlet 11, the middle part of the pump housing 1 is provided with one-way valve 12, is provided with relief valve 14 between the pump housing 1 and protecgulum 2, relief valve 14 is connected with and controls spool 13.The both sides of high pressure driving gear 4 and high pressure driven gear 5 are provided with floating side plate 15.To reach axial clearance compensation and pressure balanced object, and axial clearance compensation, axially loaded can reduce 60%, and pump not easily generates heat, and noise is little.Bonnet 3 and the pump housing 1 can adopt aluminum alloy material.Floating side plate 15 can be formed by ferrous based powder metallurgical die casting or metal sintering.These materials are all the conventional materials on market, and the present invention does not have special requirement to material.
As further improved technical scheme of the present invention, with reference to shown in Fig. 4, floating side plate 15 is provided with two relief grooves 16, and relief groove 16 is annular groove.Floating side plate 15 has relief groove 16, significantly reduce the radial force of bearing, bearing load can reduce 30%, and nearly 3 times of life longer, improves the combination property of pump.Axle sleeve 10 can adopt DU axle sleeve, and wear-resisting property is good, and friction factor is little, long service life.
Working principle and operation instruction: the present invention is provided with high pressure driving gear 4, high pressure driven gear 5 in bonnet 3; In the pump housing 1, be provided with low pressure driving gear 6 and low pressure driven gear 7, define two separate pump housings, i.e. high-pressure gear pump and low pressure gear pump, according to actual demand during work, when can realize high pressure, single pump exports, and during low pressure, double pump exports.When system is by (pressure is lower than the setting of relief valve) during low load, one-way valve is opened, high-pressure gear pump and low pressure gear pump fuel feeding simultaneously, and output flow is large, and hydraulic system realizes fast feed or rollback; When system is by (pressure is higher than the setting of relief valve) during high capacity, control spool and open relief valve, the flow that low pressure gear pump exports returns the filler opening of duplex gear pump through relief valve off-load, achieve Inner eycle, thus avoids the situation that duplex gear pump inlet port inhales sky.Now closed check valve, only has high-pressure gear POF.Compared with the pump of firm discharge, this duplex system uses power of motor to save 35%.Controlling spool by installing on the front pump of duplex gear pump, realizing pump and exporting high pressure, low pressure, and when exporting high pressure, the oil absorption of pump can be improved.
More than show and describe basic principle of the present invention and major character and advantage of the present invention.Those skilled in the art should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. a double-gear oil pump for side plate axial clearance compensation, comprises the pump housing, protecgulum, bonnet, and described protecgulum and bonnet are individually fixed in the two ends of the described pump housing; It is characterized in that,
High pressure driving gear, high pressure driven gear is provided with in the rear in lid, low pressure driving gear and low pressure driven gear is provided with in the described pump housing, described high pressure driving gear and low pressure driving gear are separately fixed on driving gear shaft, and described high pressure driven gear and low pressure driven gear are separately fixed on driven gear shaft;
Described high pressure driving gear is meshed with high pressure driven gear, and described low pressure driving gear is meshed with low pressure driven gear;
Described driving gear shaft and driven gear shaft are installed in the axle sleeve of protecgulum and bonnet;
The both sides of described high pressure driving gear and high pressure driven gear are provided with floating side plate; Described floating side plate is provided with two relief grooves; Described relief groove is annular groove;
The middle part of the described pump housing is provided with one-way valve, is provided with relief valve between the described pump housing and protecgulum, described relief valve is connected with control spool.
2. the double-gear oil pump of a kind of side plate axial clearance compensation according to claim 1, is characterized in that, described floating side plate is formed by ferrous based powder metallurgical die casting or metal sintering.
3. the double-gear oil pump of a kind of side plate axial clearance compensation according to claim 1, is characterized in that, described axle sleeve is DU axle sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210306026.XA CN103629110B (en) | 2012-08-24 | 2012-08-24 | A kind of double-gear oil pump of side plate axial clearance compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210306026.XA CN103629110B (en) | 2012-08-24 | 2012-08-24 | A kind of double-gear oil pump of side plate axial clearance compensation |
Publications (2)
| Publication Number | Publication Date |
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| CN103629110A CN103629110A (en) | 2014-03-12 |
| CN103629110B true CN103629110B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210306026.XA Active CN103629110B (en) | 2012-08-24 | 2012-08-24 | A kind of double-gear oil pump of side plate axial clearance compensation |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369006A (en) * | 2016-11-14 | 2017-02-01 | 浙江大学舟山海洋研究中心 | Digital servo hydraulic cylinder |
| CN108194349A (en) * | 2017-12-28 | 2018-06-22 | 赛克思液压科技股份有限公司 | A kind of gear pump for reducing power attenuation |
| CN108425838B (en) * | 2018-04-13 | 2024-03-19 | 合肥长源液压股份有限公司 | Gear oil pump capable of reducing radial force borne by gear |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2751161Y (en) * | 2004-12-31 | 2006-01-11 | 徐州科源液压有限公司 | Hydraulic gear pump |
| CN1755114A (en) * | 2004-09-30 | 2006-04-05 | 程安强 | Axial housing type gear pump mounted with rolling bearing and gear motor |
| CN101251107A (en) * | 2008-04-05 | 2008-08-27 | 赵明 | Multilevel inner series dual supercharging double-circular-arc gear pump |
| CN202789512U (en) * | 2012-08-24 | 2013-03-13 | 无锡市东方液压件制造有限公司 | Duplicate gear oil pump for axial clearance compensation of side plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009002316A (en) * | 2007-06-25 | 2009-01-08 | Shimadzu Corp | Gear pump or motor |
| JP4842341B2 (en) * | 2009-03-23 | 2011-12-21 | 日立オートモティブシステムズ株式会社 | Gear pump and gear pump for brake device |
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2012
- 2012-08-24 CN CN201210306026.XA patent/CN103629110B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1755114A (en) * | 2004-09-30 | 2006-04-05 | 程安强 | Axial housing type gear pump mounted with rolling bearing and gear motor |
| CN2751161Y (en) * | 2004-12-31 | 2006-01-11 | 徐州科源液压有限公司 | Hydraulic gear pump |
| CN101251107A (en) * | 2008-04-05 | 2008-08-27 | 赵明 | Multilevel inner series dual supercharging double-circular-arc gear pump |
| CN202789512U (en) * | 2012-08-24 | 2013-03-13 | 无锡市东方液压件制造有限公司 | Duplicate gear oil pump for axial clearance compensation of side plate |
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| CN103629110A (en) | 2014-03-12 |
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Effective date of registration: 20200424 Address after: 214000 No.31, Fengfeng Road, Huishan District, Wuxi City, Jiangsu Province Patentee after: WUXI DONGYE MACHINERY MANUFACTURING Co.,Ltd. Address before: 214000, No. 8, D District, tin Dong private economic Park, Beitang District, Jiangsu, Wuxi Patentee before: WUXI EAST HYDRAULIC COMPONENT MANUFACTURE Co.,Ltd. |
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