CN204175591U - A kind of four gear type gear pumps for hydraulic system - Google Patents
A kind of four gear type gear pumps for hydraulic system Download PDFInfo
- Publication number
- CN204175591U CN204175591U CN201420554388.5U CN201420554388U CN204175591U CN 204175591 U CN204175591 U CN 204175591U CN 201420554388 U CN201420554388 U CN 201420554388U CN 204175591 U CN204175591 U CN 204175591U
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- gear
- relief groove
- hydraulic system
- gear teeth
- pump housing
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Abstract
The utility model relates to a kind of hydraulic power unit, be specifically related to that a kind of flow is large, little four gear type gear pumps for hydraulic system of pulsing, comprise the pump housing, the gear cavity be arranged on the pump housing, be arranged on the gears (2) of in gear cavity four arrangements in matrix, the described pump housing is also provided with suction port one (3) and suction port two (5), exhaust port one (4) and exhaust port two (1), the gear teeth (6) of described gear (2) are provided with unload-pressure-relief groove.Object is overcome deficiency of the prior art and provide one effectively can eliminate entrap phenomenon, and effectively can improve the volume effect of gear pump, thus extends four gear type gear pumps in its working life.
Description
Technical field
The utility model relates to a kind of hydraulic power unit, is specifically related to that a kind of flow is large, four little gear type gear pumps of pulsing.
Background technique
At present, gear pump answer in hydraulic system is divided into outer gearing formula and internal messing formula two kinds, existing outer gearing formula gear pump structure is, be provided with the pump housing, the pump housing is provided with gear cavity, driving gear and driven gear is provided with in gear cavity, driving gear is connected with the pump housing through gear shaft respectively with driven gear, driving gear and driven gear are meshed, the pump housing corresponding with driving gear and the driven gear place of being meshed is provided with suction port and exhaust port, this gear pump flow is little, and fluid pulse is large, is unfavorable for the work of comparatively accurate hydraulic system.
Some problems are existed for four gear type gear pumps adopted in the patent of CN202301009U itself, when gears meshing is with the state opened, easily forms the phenomenon of pocketed oil at adjacent two gear places of folding.
Summary of the invention
The purpose of this utility model is overcome deficiency of the prior art and provide one effectively can eliminate entrap phenomenon, and effectively can improve the volume effect of gear pump, thus extends four gear type gear pumps in its working life.
The purpose of this utility model is achieved in that
A kind of four gear type gear pumps for hydraulic system, comprise the pump housing, the gear cavity be arranged on the pump housing, be arranged on the gears of in gear cavity four arrangements in matrix, the described pump housing is also provided with suction port one and suction port two, exhaust port one and exhaust port two, the gear teeth of described gear are provided with unload-pressure-relief groove.
Based on the above, described unload-pressure-relief groove is a relief groove two or is made up of relief groove one and relief groove two, and described relief groove two is opened in wheel tooth tip along facewidth direction, and described relief groove one radial direction is opened on the gear teeth;
Described relief groove one is two, is arranged symmetrically in the bi-side of the gear teeth.
Based on the above, the described lower ending opening of relief groove one docks with the tooth root of the gear teeth, and its upper end open is docked with the top of the gear teeth, and described relief groove two is opened between two relief grooves one, and two described relief grooves one are communicated with by relief groove two.
Based on the above, the width of described relief groove two is equal with the width of relief groove one or be less than the width of relief groove one.
Based on the above, described relief groove two is the square structure of opening or the arc surfaced structure of opening.
The utility model tool has the following advantages: the volume effect that effectively can improve gear pump, oil pressure, and extend the working life of gear pump, most important is effectively to eliminate the phenomenon of pocketed oil and the problem of noise.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the gear teeth structure schematic diagram with square relief groove two.
Fig. 3 is the gear teeth structure schematic diagram with arc surfaced relief groove two.
Fig. 4 is the gear teeth structure schematic diagram with relief groove one and square relief groove two.
Fig. 5 is the gear teeth structure schematic diagram with relief groove one and arc surfaced relief groove two.
Embodiment
Below in conjunction with specific embodiment, the utility model will be further described.
As shown in Fig. 1,2,3,4,5, a kind of four gear type gear pumps for hydraulic system, comprise the pump housing, the gear cavity be arranged on the pump housing, be arranged on the gears 2 of in gear cavity four arrangements in matrix, the described pump housing is also provided with suction port 1 and suction port 25, exhaust port 1 and exhaust port 21, the gear teeth 6 of described gear 2 are provided with unload-pressure-relief groove.When carrying out engaging between adjacent gear, due to the structure that the pump housing is airtight, therefore, the gear teeth can take some fluid out of, especially two gears are when engagement, can retain a certain amount of fluid between pitch wheel, by the continuous rotation of pitch wheel, so fluid is not easy to discharge from exhaust port.After having offered unload-pressure-relief groove, when intermeshing gear teeth meshing time, although a closed space can be formed between pitch wheel and tooth root, can fluid be trapped in this space, after being provided with unload-pressure-relief groove, this space has a passage and leads to outside, and the fluid inside it will flow out along relief groove, can prevent or eliminate thoroughly the phenomenon of pocketed oil.
Based on the above, described unload-pressure-relief groove is a relief groove 28 or is made up of relief groove 1 and relief groove 28, and described relief groove 28 is opened in the gear teeth 6 top along facewidth direction, and described relief groove 1 radial direction is opened on the gear teeth 6; Described relief groove 1 is two, is arranged symmetrically in the bi-side of the gear teeth 6.If unload-pressure-relief groove is until simple relief groove 28, so when two gears meshing time, being trapped in fluid in enclosed space will flow out the fluid of a part by the relief groove 28 along the gear teeth 6 top, but just little amount.If be merely that relief groove 1 is so owing to have employed the setting of radial slot, therefore for just having a passage between above-mentioned enclosed space and the external world, fluid in such enclosed space just can flow out smoothly, but the thickness due to the gear teeth 6 top is less than the thickness of tooth root, therefore, although relief groove 1 is arranged symmetrically in the gear teeth 6 both sides, but be not interconnected between two relief grooves 1, therefore, along with the rotation of the gear teeth 6, fluid in enclosed space can, by the gear teeth 6 with rotation certain distance, be not easy to discharge.
If adopt the combination of relief groove 1 and relief groove 28, a passage can be formed between the relief groove 1 be so arranged symmetrically with, along with the rotation of the gear teeth, will be communicated with between the relief groove 1 arranged poised for battle, if time a relief groove 1 forwards downward opening position to, fluid inside so symmetrical relief groove 1 will flow out downwards along relief groove 28, or enter in downward opening relief groove 1 by relief groove 28, rotate again, then ventricumbent relief groove 1 will be in the position of inclination, the fluid of its inside will flow out along relief groove 1, this makes it possible to make the fluid in enclosed space can flow out completely along with the rotation of the gear teeth, avoid the generation of entrap phenomenon.
Based on the above, the lower ending opening of described relief groove 1 docks with the tooth root of the gear teeth 6, its upper end open is docked with the top of the gear teeth 6, described relief groove 28 is opened between two relief grooves 1, described two relief grooves 1 are communicated with by relief groove 28, the layout of relief groove 1 opening is mainly considered to ensure that the fluid in enclosed space can flow out along two relief grooves 7 smoothly, can not produce secondary pocketed oil.The effect of relief groove 28 is mainly communicated with two relief grooves 1, form a unobstructed passage, ensure that the fluid in two relief grooves 1 can flow out along relief groove 28 according to the situation of rotating, and the passage that formation one is unimpeded between two relief grooves 1, it is more reasonable to design.
Based on the above, the width of described relief groove 28 is equal with the width of relief groove 1 or be less than the width of relief groove 1, the different layout of width mainly considers that the circulation between two relief grooves be arranged symmetrically with 1 is smooth and easy, if the width of relief groove 28 is equal with the width of relief groove 1, so between relief groove 28 and relief groove 1 will without any lattice keep off, form the circulation passage of a width equity.If the width of relief groove 28 is less than the width of relief groove 1, so will form lattice and keep off between relief groove 28 and relief groove 1, what fluid will circulate has some setbacks.
Based on the above, described relief groove 28 is the square structure of opening or the arc surfaced structure of opening, if wherein the relief groove 28 of cabochon structure have employed arc surfaced structure, so the circulation of fluid will be very smooth and easy, in addition, also arcuate structure can be arranged in the position that curve bath docks with gear teeth cambered surface, more smooth and easy when circulation like this.But the relief groove 28 of square structure opening is just so smooth and easy, but due to the size of its opening larger, the impact of so circulating for fluid is not too large.
In addition, this enclosed volume first reduces gradually with pinion rotation, increases gradually again later.Enclosed volume reduction can make trapped fluid be subject to squeeze and produce high pressure, and flows out from gap, causes fluid to generate heat, the unbalanced load effect that the parts such as bearing are also added.Enclosed volume increases can cause parital vacuum again, makes oil produce air pocket, causes noise, vibrations and cavitation erosion.In order to reduce the generation of entrap phenomenon, adopt and the width top of single gear mass and radial direction are provided with relief groove, such one side can eliminate entrap phenomenon in radial direction, but in order to better eliminate the phenomenon of pocketed oil, also relief groove two is provided with on the top of the width direction of single gear mass, this relief groove two is set to arcuate structure or other structure, and these two kinds of structures are combined, and can be good at the phenomenon solving pocketed oil.
Claims (5)
1. four gear type gear pumps for hydraulic system, comprise the pump housing, the gear cavity be arranged on the pump housing, be arranged on the gears (2) of in gear cavity four arrangements in matrix, the described pump housing is also provided with suction port one (3) and suction port two (5), exhaust port one (4) and exhaust port two (1), it is characterized in that: the gear teeth (6) of described gear (2) are provided with unload-pressure-relief groove.
2. a kind of four gear type gear pumps for hydraulic system according to claim 1, it is characterized in that: described unload-pressure-relief groove is a relief groove two (8) or is made up of relief groove one (7) and relief groove two (8), described relief groove two (8) is opened in the gear teeth (6) top along facewidth direction, and described relief groove one (7) radial direction is opened on the gear teeth (6);
Described relief groove one (7) is two, is arranged symmetrically in the bi-side of the gear teeth (6).
3. a kind of four gear type gear pumps for hydraulic system according to claim 2, it is characterized in that: the lower ending opening of described relief groove one (7) docks with the tooth root of the gear teeth (6), its upper end open is docked with the top of the gear teeth (6), described relief groove two (8) is opened between two relief grooves one (7), and described two relief grooves one (7) are communicated with by relief groove two (8).
4. a kind of four gear type gear pumps for hydraulic system according to claim 3, is characterized in that: the width of described relief groove two (8) is equal with the width of relief groove one (7) or be less than the width of relief groove one (7).
5. a kind of four gear type gear pumps for hydraulic system according to claim 2, is characterized in that: the square structure that described relief groove two (8) is opening or the arc surfaced structure of opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420554388.5U CN204175591U (en) | 2014-09-25 | 2014-09-25 | A kind of four gear type gear pumps for hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420554388.5U CN204175591U (en) | 2014-09-25 | 2014-09-25 | A kind of four gear type gear pumps for hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175591U true CN204175591U (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420554388.5U Expired - Fee Related CN204175591U (en) | 2014-09-25 | 2014-09-25 | A kind of four gear type gear pumps for hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204175591U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704174A (en) * | 2016-12-28 | 2017-05-24 | 常州大学 | Quadruple-action external gear pump |
| CN106894990A (en) * | 2015-12-21 | 2017-06-27 | 中国科学院沈阳自动化研究所 | A kind of gear pump of balanced radial force |
| CN109209861A (en) * | 2018-10-09 | 2019-01-15 | 宿迁学院 | A kind of composite structure for gear pump high speed pocketed oil off-load |
| CN109322821A (en) * | 2018-10-09 | 2019-02-12 | 宿迁学院 | It is a kind of for eliminating the composite structure of gear pump radial force |
| CN109356846A (en) * | 2018-10-09 | 2019-02-19 | 宿迁学院 | A kind of combination unloading-structure for pocketed oil |
| CN115289007A (en) * | 2022-08-25 | 2022-11-04 | 上海电机学院 | Involute gear unloading structure without trapped oil |
-
2014
- 2014-09-25 CN CN201420554388.5U patent/CN204175591U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894990A (en) * | 2015-12-21 | 2017-06-27 | 中国科学院沈阳自动化研究所 | A kind of gear pump of balanced radial force |
| CN106704174A (en) * | 2016-12-28 | 2017-05-24 | 常州大学 | Quadruple-action external gear pump |
| CN109209861A (en) * | 2018-10-09 | 2019-01-15 | 宿迁学院 | A kind of composite structure for gear pump high speed pocketed oil off-load |
| CN109322821A (en) * | 2018-10-09 | 2019-02-12 | 宿迁学院 | It is a kind of for eliminating the composite structure of gear pump radial force |
| CN109356846A (en) * | 2018-10-09 | 2019-02-19 | 宿迁学院 | A kind of combination unloading-structure for pocketed oil |
| CN109356846B (en) * | 2018-10-09 | 2023-08-29 | 宿迁学院 | Combined unloading structure for trapped oil |
| CN115289007A (en) * | 2022-08-25 | 2022-11-04 | 上海电机学院 | Involute gear unloading structure without trapped oil |
| CN115289007B (en) * | 2022-08-25 | 2024-01-30 | 上海电机学院 | No-dilemma involute gear unloading structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20200925 |