CN2844505Y - Planetary externally-meshed gear pump - Google Patents
Planetary externally-meshed gear pump Download PDFInfo
- Publication number
- CN2844505Y CN2844505Y CN 200520076776 CN200520076776U CN2844505Y CN 2844505 Y CN2844505 Y CN 2844505Y CN 200520076776 CN200520076776 CN 200520076776 CN 200520076776 U CN200520076776 U CN 200520076776U CN 2844505 Y CN2844505 Y CN 2844505Y
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- driving wheel
- pump
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- model
- planetary
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Abstract
The utility model relates to the field of a hydraulic gear pump, which comprises a driving wheel, planetary wheels and a pump body. The utility model is characterized in that the driving wheel is arranged in the center of the utility model, and the planetary wheels are engaged with the driving wheel, wherein the planetary wheels surround the driving wheel to be symmetrically arranged. The number of the planetary wheels is at least two, and suction holes and discharging holes are respectively arranged on pump bodies which are arranged on both sides of the engagement point of each planetary wheel and the driving wheel. The utility model has the advantages that the components of a pump can be improved, particularly the stressed state of the stress a gear and a gear shaft, abrasion can be reduced and the service life of the pump can be increased. In addition, because compared with the prior art, the number of the suction holes and the discharging holes are increased in multiples, the utility model can also provide large flow quantity.
Description
Technical field
The utility model relates to the hydraulic gear pump field, refers in particular to a kind of planet wheel external gear pump that big flow can be provided, and it can adapt to the bigger requirement of some flow.
Background technique
Because it is simple in structure that gear pump has, volume is little, and is in light weight, cost is low, self-priming performance is good, and contamination resistance is strong, series of advantages such as reliable operation, be widely used in aviation machine at present, ship machinery, walking Transport Machinery, building machinery, engineering machinery is in the various hydraulic systems such as mining machinery and lathe.But existing gear pump does not still have significantly effectively balanced radial force measure, concerning gear pump, the radial force that forms by hydraulic pressure and driving force on the gear, cause gear shaft bending deflection, each gap increases volumetric efficiency and reduces, and the very big easy abrasion of the specific pressure of bearing is especially under high discharge pressure, the appeal shortcoming is just more outstanding, thereby its application in many occasions is restricted.Aspect gear engagement, also there is not a kind of planet wheel external gear pump in addition.Patent CN92215003.6 and patent 02266075.5 disclosed planetary gear pump all are inside and outside meshed gears pumps, and inside and outside meshed gears pump structure is more than the complexity of outer gearing, and processing cost is also much higher, and maintenance is also inconvenient.
Summary of the invention
For fear of with overcome above-mentioned deficiency, the purpose of this utility model provides the planet wheel external gear pump that a kind of advantage that can keep existing gear pump substantially has the characteristics of balanced hydraulic and the formed radial force of driving force again, and this model utility can also provide bigger flow in addition.
Gear pump belongs to a kind of of rotarydisplacement pump, and it relies on the cyclically-varying of the rotation realization working chamber volume of gear engagement.When working chamber volume became big, cavity pressure reduced, and allows it communicate with inlet hole, sucked liquid; When working chamber volume diminished, cavity pressure raise, and allows it communicate with tap hole, extruded liquid.
The realization the technical solution of the utility model is:
The planet wheel external gear pump comprises: driving wheel, and planet wheel, the pump housing is characterized in that driving wheel at the center, and planet wheel is meshed with driving wheel, and wherein the planet wheel center fixation is symmetric arrangement around driving wheel.The number of planet wheel is at least two.On the both sides pump housing of each planet wheel and driving wheel contact points, respectively be provided with an inlet hole and tap hole.
Structure described in the utility model can be used for having two planetary planetary gear pumps, also is applicable to have three, four or a plurality of planetary gear pump.
The utility model has the advantages that, owing on the pump housing of planetary both sides, respectively be provided with an inlet hole and tap hole, this obviously makes the gear both sides stressed evenly, does not also just have the formed radial force of hydraulic pressure, arranges symmetrically owing to planetary pinion again, so cancel out each other by the formed radial force of driving force, thereby reach radially equilibrium of forces, therefore can improve the stress of pumping element, particularly gear and gear shaft, significantly reduce wearing and tearing, increase the working life of pump.And, because increase inlet hole at double and the quantity of tap hole compared with prior art, so this use is novel that bigger flow can be provided.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is that one of the utility model has four planetary example structure schematic representation.
As shown in the figure, number in the figure is represented respectively: 1. the pump housing 2. driving wheels 3. inlet holes 4,6,7,8. planet wheel 5. tap holes.
Embodiment
As shown in the figure, driving wheel in the present embodiment (2) is provided with 4 planet wheels (4,6 at the center, 7,8) be meshed with driving wheel (2), wherein planet wheel (4,6,7,8) center fixation is the center with the driving wheel, be symmetric arrangement around it, can guarantee planet wheel (4,6,7,8) realize rotation, and can not center on planet wheel (4,6,7,8) revolution.On the both sides pump housing (1) of each planet wheel and driving wheel (2) contact points, respectively be provided with one and enter hole (3) and tap hole (5).
During use, open gear pump, liquid just constantly sucks from each planetary hole (3) that enters, and discharges from tap hole (5).Gear is rotated further, and above-mentioned suction process has just constantly been carried out continuously.
Claims (2)
1. planet wheel external gear pump, comprise: driving wheel, planet wheel, the pump housing is characterized in that driving wheel (2) at the center, and planet wheel (4,6,7,8) is meshed with driving wheel (2), planet wheel (4,6,7,8) center fixation wherein, be symmetric arrangement around driving wheel (2), the number of planet wheel (4,6,7,8) is at least two, respectively is provided with an inlet hole (3) and tap hole (5) on the both sides pump housing (1) of each planet wheel (4,6,7,8) and driving wheel (2) contact points.
2. planet wheel external gear pump according to claim 1, the number that it is characterized in that planet wheel is three, four or a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076776 CN2844505Y (en) | 2005-10-27 | 2005-10-27 | Planetary externally-meshed gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076776 CN2844505Y (en) | 2005-10-27 | 2005-10-27 | Planetary externally-meshed gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2844505Y true CN2844505Y (en) | 2006-12-06 |
Family
ID=37486455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520076776 Expired - Fee Related CN2844505Y (en) | 2005-10-27 | 2005-10-27 | Planetary externally-meshed gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2844505Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218211A (en) * | 2017-05-27 | 2017-09-29 | 武汉大学 | Variable low-pulsation gear pump |
-
2005
- 2005-10-27 CN CN 200520076776 patent/CN2844505Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218211A (en) * | 2017-05-27 | 2017-09-29 | 武汉大学 | Variable low-pulsation gear pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |