CN109812415A - A kind of gear pump fuel oil injection filling mechanism and its fill method - Google Patents
A kind of gear pump fuel oil injection filling mechanism and its fill method Download PDFInfo
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- CN109812415A CN109812415A CN201811396343.9A CN201811396343A CN109812415A CN 109812415 A CN109812415 A CN 109812415A CN 201811396343 A CN201811396343 A CN 201811396343A CN 109812415 A CN109812415 A CN 109812415A
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- gear pump
- fuel oil
- ejector pipe
- driving nozzle
- oil injection
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Abstract
The invention belongs to aircraft engine fuel oil system hydraulic machinery structure-design technique fields, and in particular to a kind of gear pump fuel oil injection filling mechanism and its fill method.Gear pump fuel oil injection filling mechanism of the present invention includes driving nozzle (1) and ejector pipe (2).Wherein, the driving nozzle (1) and ejector pipe (2) are placed in low pressure chamber, and driving nozzle (1) is rectified using convergence structure, convergence to ejector pipe (2), and the other end is connected with differential pressure valve oil return circuit.Ejector pipe (2) uses expansion structure, its expansion end is connected with gear pump inlet, and there are certain gaps between driving nozzle (1) and ejector pipe (2), and low pressure chamber fuel oil is enabled to enter ejector pipe (2) together with pressure difference oil return.The present invention can be effectively reduced temperature rise using ejection structure, while then the filling effect of gear pump can be made to effectively improve by the position of reasonable arrangement ejection structure, guarantee that hydro-mechanical unit performance is more stable.
Description
Technical field
The invention belongs to aircraft engine fuel oil system hydraulic machinery structure-design technique fields, and in particular to a kind of gear
Pump fuel oil injection filling mechanism and its fill method.
Background technique
When using gear pump as pressure oil-source in aircraft engine fuel oil system hydro-mechanical unit, because fuel oil passes through tooth
Wheel pump can inevitably generate temperature rise, if while hydro-mechanical unit differential pressure valve oil return (gear pump after-burning by squeezing
Oil) low pressure chamber is flowed directly into, it will cause entire hydraulic system temperature constantly to increase；The filling effect of gear pump is poor, also easily makes
It reduces at the gear efficiency of pump and even damages.
The gear pump position of domestic air mail engine fuel oil system hydro-mechanical unit at present, mostly uses booster pump to fuel oil
Pressurization, is then passed directly into gear pump inlet；Pass through hydro-mechanical unit internal pressure by the pressurized fuel oil a part of gear pump
Oil return is to low pressure chamber after poor valve.This method is affected by booster pump, can not be increased to fuel oil in booster pump failure
In the case where pressure, gear pump filling effect can then decline, to influence gear pump performance；Due to the pressurized fuel oil temperature of gear pump
Degree increases, and to low pressure chamber, then hydro-mechanical unit internal temperature can be made constantly to increase, temperature by the direct oil return of differential pressure valve
It is excessively high the performance of hydro-mechanical unit also to be impacted.
Summary of the invention
The object of the present invention is to provide one kind to reduce fuel oil temperature rise under gear pump normal operating conditions and improve
The fuel oil injection filling mechanism of the filling effect of gear pump.
In addition, also providing a kind of gear pump fuel oil injection fill method.
The technical scheme is that: a kind of gear pump fuel oil injection filling mechanism comprising driving nozzle 1 and ejector pipe 2,
Wherein, the driving nozzle 1 and ejector pipe 2 are placed in low pressure chamber, and driving nozzle 1 is rectified using convergence structure, convergence to drawing
Pipe 2 is penetrated, the other end is connected with differential pressure valve oil return circuit；Ejector pipe 2 uses expansion structure, expansion end and gear pump inlet phase
Even, there are certain gap and between driving nozzle 1 and ejector pipe 2, enable low pressure chamber fuel oil together with pressure difference oil return into
Enter ejector pipe 2.
Gap between the driving nozzle 1 and ejector pipe 2 is 2~3mm.
1 convergent angle of driving nozzle is 40 °~50 °.
Driving nozzle 1 restrains 1/3~1/2 that outlet diameter is 2 inlet diameter of ejector pipe.
The inner hole expansion angle of the ejector pipe is 2 °~10 °.
A kind of fuel oil injection fill method using the gear pump fuel oil injection filling mechanism, in driving nozzle 1
The oil return of high pressure pressure difference enters ejector pipe after exchanging after the decompression of driving nozzle 1 with low pressure chamber fuel oil together, is pressurized in ejector pipe
After fill gear pump.
The pressure difference return pressure and low pressure chamber fuel pressure that driving nozzle 1 comes out are almost the same.
Beneficial effects of the present invention: the present invention can be effectively reduced temperature rise using ejection structure, while pass through reasonable arrangement
The position of ejection structure then can make the filling effect of gear pump effectively improve, and guarantee that hydro-mechanical unit performance is more steady
It is fixed.
Detailed description of the invention
Fig. 1 is gear pump fuel oil injection filling mechanism schematic diagram of the present invention；
Fig. 2 is ejection structure schematic diagram,
Wherein, 1- driving nozzle, 2- ejector pipe, 3- gear pump, 4- low pressure chamber.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Referring to Fig. 1, gear pump fuel oil injection filling mechanism of the present invention is mainly made of driving nozzle 1 and ejector pipe 2.Its
In, driving nozzle 1 and ejector pipe 2 are placed in low pressure chamber, and the convergence of driving nozzle 1 is rectified to ejector pipe 2, the other end and differential pressure valve
Oil return circuit is connected；2 expansion end of ejector pipe is connected with gear pump inlet.Driving nozzle 1, which uses, restrains structure, in the present embodiment,
1 convergent angle of driving nozzle is 45 °, and minimum diameter is Φ 4mm, so that the pressure difference oil return tooth in fuel system hydraulic machinery structure
Fuel oil passes through the structure after wheel pump, and fuel pressure is effectively reduced, increases flow velocity.Between driving nozzle 1 and ejector pipe 2, there are one
Fixed gap, generally 2~3mm, so that low pressure chamber fuel oil, which can also can smoothly enter into, to be drawn in addition to fuel oil after pressure difference oil return gear pump
Pipe 2 is penetrated, gear oil pump feed demand is met.The ejector pipe 2 uses expansion structure, in the present embodiment, the diameter of bore of ejector pipe 2
For Φ 7.95mm, inner hole expansion angle is 2 ° 40 ', and 2 length of ejector pipe is 63.2mm, so that into the low-voltage fuel of ejector pipe 2
Flow velocity is reduced, increases pressure, while improving hydro-mechanical unit internal fuel heat exchange, reduces fuel oil temperature.2 rear end of ejector pipe
Connection gear pump inlet can effectively improve the filling effect of gear pump so that the fuel pressure into gear pump is higher than low pressure chamber.
Gear pump fuel oil injection fill method of the present invention passes through booster pump when it is implemented, when hydro-mechanical unit works
Oil tank fuel is pressurized, and fuel oil after pressurization is injected into hydro-mechanical unit low pressure chamber.At this point, by hydraulic machinery structure
Internal pressure difference oil return, after the driving nozzle 1 by restraining structure, fuel oil improves flow velocity, reduces pressure.Driving nozzle 1 comes out
Pressure difference return pressure and low pressure chamber fuel pressure it is almost the same, pressure difference oil return enters ejector pipe 2 together with low pressure chamber fuel oil, warp
The ejector pipe 2 of expansion structure is crossed, fuel flow rate reduces, pressure rise, enters gear pump inlet to be higher than the pressure of low pressure chamber, mentions
Rise gear pump filling effect.
Claims (7)
1. a kind of gear pump fuel oil injection filling mechanism, which is characterized in that including driving nozzle (1) and ejector pipe (2), wherein
The driving nozzle (1) and ejector pipe (2) are placed in low pressure chamber, and driving nozzle (1) is rectified using convergence structure, convergence to drawing
Pipe (2) are penetrated, the other end is connected with differential pressure valve oil return circuit；Ejector pipe (2) using expansion structure, expansion end and gear pump into
Mouth is connected, and there are certain gaps between driving nozzle (1) and ejector pipe (2), and low pressure chamber fuel oil and pressure difference are returned
Oil enters ejector pipe (2) together.
2. gear pump fuel oil injection filling mechanism according to claim 1, which is characterized in that the driving nozzle (1) and
Gap between ejector pipe (2) is 2~3mm.
3. gear pump fuel oil injection filling mechanism according to claim 1, which is characterized in that driving nozzle (1) convergency
Degree is 40 °~50 °.
4. gear pump fuel oil injection filling mechanism according to claim 1, which is characterized in that driving nozzle (1) is restrained out
Mouth diameter is the 1/3~1/2 of ejector pipe (2) inlet diameter.
5. gear pump fuel oil injection filling mechanism according to claim 1, which is characterized in that the inner hole of the ejector pipe expands
Subtended angle degree is 2 °~10 °.
6. a kind of fuel oil injection filling side using described in any one of claim 1 to 55 described in any item gear pump fuel oil injection filling mechanisms
Method, which is characterized in that after the high pressure pressure difference oil return in driving nozzle (1) exchanges after the decompression of driving nozzle 1 with low pressure chamber fuel oil
Enter ejector pipe together, fills gear pump after being pressurized in ejector pipe.
7. gear pump fuel oil injection fill method according to claim 6, which is characterized in that driving nozzle (1) came out
Pressure difference return pressure and low pressure chamber fuel pressure are almost the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811396343.9A CN109812415B (en) | 2018-11-21 | 2018-11-21 | Gear pump fuel injection filling mechanism and filling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811396343.9A CN109812415B (en) | 2018-11-21 | 2018-11-21 | Gear pump fuel injection filling mechanism and filling method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109812415A true CN109812415A (en) | 2019-05-28 |
| CN109812415B CN109812415B (en) | 2020-12-29 |
Family
ID=66601624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811396343.9A Active CN109812415B (en) | 2018-11-21 | 2018-11-21 | Gear pump fuel injection filling mechanism and filling method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109812415B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113002783A (en) * | 2021-04-08 | 2021-06-22 | 安徽砺德特种动力科技有限公司 | Electric control type pump body, driving device for unmanned aerial vehicle and fluid transmission method |
Citations (6)
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| US3922113A (en) * | 1972-01-06 | 1975-11-25 | Plessey Co Ltd | Metered supply of liquids |
| JPS62195488A (en) * | 1986-02-20 | 1987-08-28 | Nippon Denso Co Ltd | Fuel feeding device for vehicle |
| CN1383404A (en) * | 2000-06-03 | 2002-12-04 | 西门子公司 | Fuel delivery unit |
| CN1769718A (en) * | 2004-11-03 | 2006-05-10 | 东元电机股份有限公司 | Returning oil injection pump of water cooling machine |
| CN102036848A (en) * | 2008-06-04 | 2011-04-27 | 大陆汽车有限责任公司 | Pump device for feeding fuel in a fuel tank |
| CN105508310A (en) * | 2015-12-08 | 2016-04-20 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Aviation fuel jet pump capable of sucking fuel from double ends |
-
2018
- 2018-11-21 CN CN201811396343.9A patent/CN109812415B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3922113A (en) * | 1972-01-06 | 1975-11-25 | Plessey Co Ltd | Metered supply of liquids |
| JPS62195488A (en) * | 1986-02-20 | 1987-08-28 | Nippon Denso Co Ltd | Fuel feeding device for vehicle |
| CN1383404A (en) * | 2000-06-03 | 2002-12-04 | 西门子公司 | Fuel delivery unit |
| CN1769718A (en) * | 2004-11-03 | 2006-05-10 | 东元电机股份有限公司 | Returning oil injection pump of water cooling machine |
| CN102036848A (en) * | 2008-06-04 | 2011-04-27 | 大陆汽车有限责任公司 | Pump device for feeding fuel in a fuel tank |
| CN105508310A (en) * | 2015-12-08 | 2016-04-20 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Aviation fuel jet pump capable of sucking fuel from double ends |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113002783A (en) * | 2021-04-08 | 2021-06-22 | 安徽砺德特种动力科技有限公司 | Electric control type pump body, driving device for unmanned aerial vehicle and fluid transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109812415B (en) | 2020-12-29 |
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