CN103994068A - Double-arc harmonic wave compound gear pump - Google Patents
Double-arc harmonic wave compound gear pump Download PDFInfo
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- CN103994068A CN103994068A CN201410237301.6A CN201410237301A CN103994068A CN 103994068 A CN103994068 A CN 103994068A CN 201410237301 A CN201410237301 A CN 201410237301A CN 103994068 A CN103994068 A CN 103994068A
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- side plate
- circular arc
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- 150000001875 compounds Chemical class 0.000 title 1
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000021615 conjugation Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The invention relates to a double-circular-arc harmonic composite gear pump which comprises a pump body, a side plate, a crescent plate and a gear set, wherein the gear set comprises a driving rigid wheel, a driven rigid wheel and a flexible wheel, the driving rigid wheel and the driven rigid wheel are double-circular-arc external gears, the driving rigid wheel is meshed with the driven rigid wheel, the flexible wheel is sleeved outside the driving rigid wheel and the driven rigid wheel, the flexible wheel is a flexible double-circular-arc inner gear ring, the flexible wheel is respectively meshed with two driven rigid wheels, the crescent plate is filled between the flexible wheel, the driving rigid wheel and the driven rigid wheel, a sealed working cavity is formed between the flexible wheel, the driving rigid wheel, the driven rigid wheel, the side plate and the crescent plate, and the sealed working cavity is divided into four symmetrical oil suction cavities and four symmetrical oil pressing cavities by gear tooth meshing lines of the crescent plate, the side plate, the driving rigid wheel and. Compared with the existing gear pump, the double-circular-arc harmonic composite gear pump has the advantages of increasing the discharge capacity, reducing vibration, reducing noise, prolonging the service life and improving the pump pressure, thereby having wider engineering application prospect.
Description
Technical field
The present invention relates to oil hydraulic pump technical field, especially a kind of two circular arc harmonic composite gear pumps.
Background technique
Oil hydraulic pump is to rely on the variation of the volume in seal operation space to realize suction liquid.Gear pump is that a kind of utilization is sealed in pitch wheel in housing and the oil hydraulic pump of working.
Gear pump at present used, due to reasons in structure, only has an oil sucting cavity and a pumping cavity, thereby exists the defects such as radial force imbalance, flow pulsation is large, vibration is large, noise is high, volumetric efficiency is low.For the defect of gear pump, people have carried out a series of research work.A large amount of researchs show, although take rational structural design to reduce to a certain extent radial hydraulic pressure, reduce flow pulsation, improve volumetric efficiency, extend life-span of gear pump, still can not tackle the problem at its root.
Although existing harmonic gear pump can solve the unbalanced problem of radial force, still exist the defects such as pump pressure is little, the gear teeth fatigue strength deficiency of flexbile gear due to reasons in structure.Therefore, be necessary very much the gear pump of development of new.
Summary of the invention
The technical problem to be solved in the present invention is: two circular arc harmonic composite gear pumps that can increase discharge capacity in order to provide a kind of, reduce flow pulsation, reduce vibration and noise, life-saving, raising pump pressure.
The technical solution adopted for the present invention to solve the technical problems is: a kind of two circular arc harmonic composite gear pumps, comprise the pump housing, side plate, swing link and gear train, described gear train comprises initiatively just wheel, driven firm wheel and flexbile gear, top has just been taken turns in described active and bottom is respectively arranged with driven firm wheel, described active has just been taken turns and driven firm wheel is two circular arc external gears, initiatively just wheel is meshed with driven firm wheel, described flexbile gear is set in outside the firm wheel of active and driven firm wheel, flexbile gear is flexible two circular arc ring gear, flexbile gear is meshed with two driven firm wheels respectively, described swing link is filled in flexbile gear, initiatively just take turns, between driven firm wheel, flexbile gear, initiatively just take turns, driven firm wheel and side plate, between swing link, form pressurization working lumen, swing link, side plate and just wheel of active, driven firm wheel, pressurization working lumen is separated into four symmetrical oil sucting cavities and four symmetrical pumping cavities by the gear teeth meshing line of flexbile gear.
Described side plate comprises front side plate and back side panel, and front side plate, back side panel are arranged on described gear train both sides.
Described swing link is fixed on side plate by some locating studs.
Described active just wheel is connected by flat key and driving shaft, and described driven firm wheel is connected by flat key and driven shaft, initiatively just takes turns, the facewidth of driven firm wheel and flexbile gear equates, has initiatively just taken turns and the center line of flexbile gear coincides.
The advantage of harmonic gear, Novikov gears with double circular arc tooth profiles and gear pump is incorporated into one by the present invention, is specially:
1) flow large, pulse little, vibrate little, noise is low, balanced radial force.In Harmonic Gears process, sealing active chamber is separated into four symmetrical oil sucting cavity m and four symmetrical pumping cavity n by the gear teeth meshing line of swing link, side plate and initiatively firm wheel, driven firm wheel, flexbile gear.Increasing of oil sucting cavity and pumping cavity, causes flow obviously to increase, i.e. initiatively just wheel rotation 1 week, and by the flow of discharging four times, and flow pulsation will further reduce, thus vibration is less, noise is lower; And because the radial force that pumping cavity produces is cancelled out each other, solve balanced radial force problem.
2) torsional stiffness of flexbile gear and intensity improve.Because the gear tooth profile of wheel, driven firm wheel and flexbile gear initiatively just all adopts double circular arc tooth shape, initiatively just the gear tooth profile of wheel, driven firm wheel and flexbile gear has respectively the wide and recessed flank profil of double wedge simultaneously; In the time of the firm wheel of active and driven firm wheel engagement driving, double circular arc tooth shape not only ensured initiatively just the flank profil of wheel and driven firm wheel in engagement driving process all the time in conjugate movement state, but also because initiatively just the double wedge of wheel exterior feature and recessed flank profil engage and exist between biconjugate meshing zone with the recessed flank profil of driven firm wheel and double wedge exterior feature respectively simultaneously.
In like manner, in the time of driven firm wheel and flexbile gear engagement driving, the flank profil that double circular arc tooth shape has not only ensured driven firm wheel and flexbile gear in engagement driving process all the time in conjugate movement state, but also because the double wedge of driven firm wheel is wide and recessed flank profil engages and exists between biconjugate meshing zone with the recessed flank profil of flexbile gear and double wedge exterior feature respectively simultaneously.The existence of biconjugate meshing zone has improved torsional stiffness and the intensity of flexbile gear greatly.
The raising of the releasing of radial hydraulic pressure and flexbile gear torsional stiffness and intensity, will extend the working life of gear pump greatly.
The invention has the beneficial effects as follows: the two circular arc harmonic composite gear pumps of the present invention, compared with existing gear pump, have advantages of the discharge capacity of increase, reduce to vibrate, reduce noise, life-saving and improve pump pressure, thereby have more wide future in engineering applications.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the perspective view of a preferred embodiment of the two circular arc harmonic composite gear pumps of the present invention;
In figure: 1. locating stud, 2. locating stud, the 3. pump housing, 4. driven shaft, 5. side plate, 6. flat key, 7. screw, 8. swing link, 9. flexbile gear, 10. initiatively just takes turns 11. driving shafts, 12. driven firm wheels.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, a kind of two circular arc harmonic composite gear pump, comprise the pump housing 3, side plate 5, swing link 8 and gear train, described gear train comprises initiatively just wheel 10, driven firm wheel 12 and flexbile gear 9, described active has just been taken turns 10 tops and bottom and has been respectively arranged with driven firm wheel 12, the firm wheel 10 of described active and driven firm wheel 12 are two circular arc external gears, initiatively just wheel 10 is meshed with driven firm wheel 12, described flexbile gear 9 is set in outside the firm wheel 10 of active and driven firm wheel 12, flexbile gear 9 is flexible two circular arc ring gear, flexbile gear 9 is meshed with two driven firm wheels 12 respectively, described swing link 8 is filled in flexbile gear 9, initiatively just take turns 10, between driven firm wheel 12, flexbile gear 9, initiatively just take turns 10, driven firm wheel 12 and side plate 5, between swing link 8, form pressurization working lumen, swing link 8, side plate 5 takes turns 10 with initiatively firm, driven firm wheel 12, pressurization working lumen is separated into four symmetrical oil sucting cavity m and four symmetrical pumping cavity n by the gear teeth meshing line of flexbile gear 9.
Of the present invention pair of circular arc harmonic composite gear pump is mainly by initiatively just wheel 10, driven firm wheel 12, flexbile gear 9, swing link 8, the pump housing 3, side plate 5, driving shaft 11, driven shaft 4 form.
Initiatively just wheel 10 is connected by flat key 6 with driving shaft 11, and initiatively just wheel 10 is the two circular arc external gears of rigidity, has recessed flank profil and double wedge exterior feature on gear tooth profile simultaneously.
Driven firm wheel 12 is connected by flat key 6 with driven shaft 4, and driven firm wheel 12 is also the two circular arc external gears of rigidity, has recessed flank profil and double wedge exterior feature on gear tooth profile simultaneously.
Flexbile gear 9, for having two circular arc ring gears of certain flexible flexibility, thin-walled, activity, has double wedge exterior feature and recessed flank profil simultaneously on gear tooth profile.
Initiatively just the facewidth of wheel 10, driven firm wheel 12 and flexbile gear 9 equates, initiatively just the center line of wheel 10 and flexbile gear 9 overlaps.
Locating stud 1 and screw 7 are fixing for the pump housing 3.
In transmission process, initiatively just the double wedge of wheel 10 exterior feature and recessed flank profil engage with recessed flank profil and the double wedge exterior feature of driven firm wheel 12 respectively simultaneously, thereby form between two conjugation meshing zones.
In transmission process, double wedge exterior feature and the recessed flank profil of driven firm wheel 12 engage with recessed flank profil and the double wedge exterior feature of flexbile gear 9 respectively simultaneously, thereby form between two conjugation meshing zones.
The existence of biconjugate meshing zone has improved torsional stiffness and the intensity of flexbile gear greatly, solve the problem of flexbile gear insufficient rigidity in existing Harmonic Gears, improve the torsional stiffness of harmonic gear, thereby extended the working life and the working pressure that has improved gear pump of gear pump.
Swing link 8 is between the tooth top of the firm wheel 10 of active, driven firm wheel 12 and flexbile gear 9, and the pin 2 that is positioned is fixed on side plate 5.
Side plate 5 is divided into two of front and back, is fixed on initiatively the just both sides, front and back of wheel 10, driven firm wheel 12 and flexbile gear 9.
Based on the feature of harmonic gear engagement driving, initiatively firm wheel 10 and driven firm wheel 12, flexbile gear 9, swing link 8, side plate 5 form the oil pocket of 8 sealings altogether, i.e. four oil sucting cavity m and four pumping cavity n, and be arranged symmetrically; Due to oil sucting cavity and pumping cavity symmetry between two, the radial hydraulic pressure therefore acting on transmission shaft is cancelled out each other, thereby has reduced bearing load, has improved the working life of gear pump.
Working principle of the present invention is as follows: in the time that motor clockwise rotates, drive initiatively just wheel 10 to rotate by driving shaft 11, initiatively just wheel 10 by with the engagement driving of driven firm wheel 12, drive driven firm wheel 12 to rotate, driven firm wheel 12 by with the engagement driving of flexbile gear 9, drive flexbile gear 9 to rotate.
The source of nibbling at the firm wheel 10 of active with driven firm wheel 12 gear teeth, between cog Seal cage becomes greatly gradually, forms parital vacuum, and fluid is under atmospheric effect, and the oil inlet hole on front-end bearing pedestal enters into two oil sucting cavity m that are arranged symmetrically, and completes oil-absorbing process.Meanwhile, the source of nibbling at driven firm wheel 12 with flexbile gear 9 gear teeth, it is large that between cog Seal cage also becomes gradually, forms parital vacuum, and fluid is under atmospheric effect, and the oil inlet hole on front-end bearing pedestal enters into two oil sucting cavity m that are arranged symmetrically, and completes oil-absorbing process.Be whole oil-absorbing process, will form four oil sucting cavities that are arranged symmetrically with.
, there are two pumping cavity n that are arranged symmetrically with at engaging-in place at the firm wheel 10 of active with driven firm wheel 12 gear teeth, and takes turns 10 continue rotation along with active is firm, pumping cavity n diminishes gradually, and the fluid that sucks between cog is extruded, the oil outlet on rear bearing block, pressure oil output, completes oil extraction process.Meanwhile,, there are two pumping cavity n that are arranged symmetrically with at the engaging-in place at driven firm wheel 12 with flexbile gear 9 gear teeth, along with the rotation of driven firm wheel 12, pumping cavity n diminishes gradually, and the fluid that sucks between cog is extruded, oil outlet on rear bearing block, pressure oil output, completes oil extraction process.Therefore whole oil extraction process, will form four pumping cavities that are arranged symmetrically with.
Along with motor ceaselessly turns round, suction oil process is carried out again and again.
The two circular arc harmonic composite gear pumps of the present invention, compared with existing gear pump, have advantages of the discharge capacity of increase, reduce to vibrate, reduce noise, life-saving and improve pump pressure, thereby have more wide future in engineering applications.
Taking above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to claim scope.
Claims (6)
1. a two circular arc harmonic composite gear pump, comprise the pump housing, side plate, swing link and gear train, it is characterized in that: described gear train comprises initiatively just wheel, driven firm wheel and flexbile gear, top has just been taken turns in described active and bottom is respectively arranged with driven firm wheel, described active has just been taken turns and driven firm wheel is two circular arc external gears, initiatively just wheel is meshed with driven firm wheel, described flexbile gear is set in outside the firm wheel of active and driven firm wheel, flexbile gear is flexible two circular arc ring gear, flexbile gear is meshed with two driven firm wheels respectively, described swing link is filled in flexbile gear, initiatively just take turns, between driven firm wheel, flexbile gear, initiatively just take turns, driven firm wheel and side plate, between swing link, form pressurization working lumen, swing link, side plate and just wheel of active, driven firm wheel, pressurization working lumen is separated into four symmetrical oil sucting cavities and four symmetrical pumping cavities by the gear teeth meshing line of flexbile gear.
2. as claimed in claim 1 pair of circular arc harmonic composite gear pump, is characterized in that: described side plate comprises front side plate and back side panel, and front side plate, back side panel are arranged on described gear train both sides.
3. as claimed in claim 1 pair of circular arc harmonic composite gear pump, is characterized in that: described swing link is fixed on side plate by some locating studs.
4. as claimed in claim 1 pair of circular arc harmonic composite gear pump, is characterized in that: described active just wheel is connected by flat key and driving shaft, and described driven firm wheel is connected by flat key and driven shaft.
5. as claimed in claim 1 pair of circular arc harmonic composite gear pump, is characterized in that: described active is just taken turns, the facewidth of driven firm wheel and flexbile gear equates.
6. as claimed in claim 1 pair of circular arc harmonic composite gear pump, is characterized in that: described active just wheel coincides with the center line of flexbile gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410237301.6A CN103994068A (en) | 2014-05-30 | 2014-05-30 | Double-arc harmonic wave compound gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410237301.6A CN103994068A (en) | 2014-05-30 | 2014-05-30 | Double-arc harmonic wave compound gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103994068A true CN103994068A (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410237301.6A Pending CN103994068A (en) | 2014-05-30 | 2014-05-30 | Double-arc harmonic wave compound gear pump |
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| Country | Link |
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| CN (1) | CN103994068A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823638A (en) * | 1986-11-05 | 1989-04-25 | Harmonic Drive Systems Inc. | Tooth profile of spline of strain wave gearing |
| CN2128978Y (en) * | 1992-06-08 | 1993-03-31 | 孙承舜 | Double-acting full-balance gear pump |
| CN103291610A (en) * | 2012-02-24 | 2013-09-11 | 常州大学 | Quadruple-action harmonic gear pump |
| CN103291612A (en) * | 2012-02-24 | 2013-09-11 | 常州大学 | Harmonic gear pump |
| CN203847383U (en) * | 2014-05-30 | 2014-09-24 | 江苏理工学院 | Double-arc harmonic wave compound gear pump |
-
2014
- 2014-05-30 CN CN201410237301.6A patent/CN103994068A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823638A (en) * | 1986-11-05 | 1989-04-25 | Harmonic Drive Systems Inc. | Tooth profile of spline of strain wave gearing |
| CN2128978Y (en) * | 1992-06-08 | 1993-03-31 | 孙承舜 | Double-acting full-balance gear pump |
| CN103291610A (en) * | 2012-02-24 | 2013-09-11 | 常州大学 | Quadruple-action harmonic gear pump |
| CN103291612A (en) * | 2012-02-24 | 2013-09-11 | 常州大学 | Harmonic gear pump |
| CN203847383U (en) * | 2014-05-30 | 2014-09-24 | 江苏理工学院 | Double-arc harmonic wave compound gear pump |
Non-Patent Citations (1)
| Title |
|---|
| 辛洪兵: "双圆弧谐波齿轮传动基本齿廓设计", 《中国机械工程》 * |
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Application publication date: 20140820 |