CN110469542A - A kind of fuel inlet device improving centrifugal pump suction capacity - Google Patents
A kind of fuel inlet device improving centrifugal pump suction capacity Download PDFInfo
- Publication number
- CN110469542A CN110469542A CN201910762081.1A CN201910762081A CN110469542A CN 110469542 A CN110469542 A CN 110469542A CN 201910762081 A CN201910762081 A CN 201910762081A CN 110469542 A CN110469542 A CN 110469542A
- Authority
- CN
- China
- Prior art keywords
- centrifugal pump
- inlet device
- suction capacity
- fuel inlet
- oil return
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/12—Light metals
- F05D2300/121—Aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
- F05D2300/171—Steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to aircraft engine fuel oil system low-voltage fuel pump technical fields, it is related to a kind of fuel inlet device for improving centrifugal pump suction capacity, comprising integral type inducer impeller inducer (1), pump cover (2), injection pipe (3), the internal structure of formation includes mixing section (4), nozzle (5), trunnion (6), oil return pipe (7), diffuser (8) and oil return opening (9).The present invention dexterously utilizes centrifugal pump cover itself, one is exported high pressure oil and leads back import by setting oil return opening and oil return pipe, and jet stream is formed by nozzle, while raising to import suction capacity, increase import energy, anti-cavitation ability is improved, and the structure is simple, Yi Shixian, and saves weight and space.
Description
Technical field
The invention belongs to aircraft engine fuel oil system low-pressure fuel pump fields, and in particular to a kind of structure is simply used
In the inlet device for improving centrifugal pump self-priming performance and anti-cavitation ability.
Background technique
In certain aircraft engine fuel oil systems, centrifugal pump is used as primary booster pump, carries out to fuel tank coming oil primary
It is pressurized fuel pressure needed for providing no air pocket work for high-pressure pump.In order to reduce continuous work damage and catch fire can
Energy property, fuel tanker, which is set as low level fuel tank, makes its position lower than pressurization pump inlet, guarantees that fuel tank is extremely pressurized between pump inlet and manages
The subatmospheric power of fuel pressure in road, while fuel tank venthole is communicated with atmosphere.Therefore need centrifugal pump that there is stronger self-priming
Oil liquid is sucked out ability from fuel tank, and traditional vacuum self-priming apparatus, not only occupies larger space and increases product
Weight and complexity are not able to satisfy the requirement that aircraft engine accessory is compact-sized, light-weight.In addition, the application environment be with
The continuous soaring atmospheric pressure of aircraft flight height gradually decreases, and tank pressure moves closer to saturated vapor pressure, oil liquid part
It is evaporated to gas, import fuel oil is gas-liquid mixed state at this time.It is right therefore while proposing requirements at the higher level to centrifugal pump suction capacity
Anti-cavitation ability also has higher requirements, and only relies on traditional change inlet vane shape and increase the modes such as inducer, can not
Meet requirements above.
It is therefore proposed that a kind of structure is simple, centrifugal pump suction capacity can be improved, and has the dress of stronger anti-cavitation ability
It sets particularly important.
Summary of the invention
The purpose of the present invention is: it is insufficient in order to solve the above-mentioned prior art, provide that a kind of structure is simple, Yi Shixian, design
Reasonable centrifugal pump inlet device, thus while improving centrifugal pump suction capacity, and have stronger anti-cavitation ability.
To solve this technical problem, the technical scheme is that
A kind of fuel inlet device improving centrifugal pump suction capacity, including integral type inducer impeller inducer 1, pump cover 2, injection
Pipe 3；Pump cover 2 is divided into three sections since entrance: first segment is mixing section 4, and centre is trunnion 6, and third section is toroidal
Diffuser 8；Positioned at the inside of pump cover 2 through there is oil return pipe 7, oil return pipe 7 is connected to injection pipe 3, forms drainback passage；
The integral type inducer impeller inducer 1 is mounted on the horn mouth end face of diffuser 8；
The injection pipe 3 seals the mixing section 4 for being assemblied in pump cover 2.
The integral type inducer impeller inducer 1 is consistent with the flared end face cone face structure type of diffuser 8.
The gap of the integral type inducer impeller inducer 1 and the horn mouth end face of diffuser 8 is 0.2mm-0.4mm.To reduce
Leakage.
The injection pipe 3 is sealed by way of force fit to be assemblied in pump cover 2, and is sealed by sealing ring.
The length of the trunnion 6 is the 1/3-1/2 of 2 length of pump cover.The length setting of trunnion 6 should be grown as far as possible, so that
High-speed jet and low pressure mixed flow are sufficiently carried out energy exchange, keep fluid velocity gradually balanced, are converted into potential energy by kinetic energy and obtain
Higher static pressure is obtained, and static pressure is further increased by diffuser 8.
Preferably, the oil return opening 9 is arranged on pump cover 2 and inducer position corresponding with impeller intersection.
Preferably, 7 section of oil return pipe is circle.
Preferably, 3 material of injection pipe is steel.
Preferably, it is described 2 material of pump cover be aluminium.
The beneficial effects of the present invention are:
Centrifugal pump inlet device of the invention dexterously utilizes centrifugal pump cover itself, and setting oil return opening and oil return pipe will
One outlet high pressure oil leads back import, and forms jet stream by nozzle, while to the raising of import suction capacity, increase into
Mouth energy, improves anti-cavitation ability.And the structure is simple, Yi Shixian, and saves weight and space.
Detailed description of the invention
In order to illustrate more clearly of the technical solution implemented of the present invention, below by needed in example of the invention using
Attached drawing make simple explain.It is clear that drawings described below is only some embodiments of the present invention, for this
For the technical staff in field, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 be centrifugal pump inlet structure drawing of device；
Fig. 2 is the enlarged drawing of I in Fig. 1, i.e. oil return opening position enlarged drawing；
In figure: 1- integral type inducer impeller inducer；2- pump cover；3- injection pipe；4- suction chamber；5- nozzle；6- trunnion；7- oil return
Pipe；8- horn mouth；9- oil return opening.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiments of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, the ordinary skill of this field
Without making creative work, every other embodiment obtained belongs to the model that the present invention protects to personnel
It encloses.
The feature of the various aspects of the embodiment of the present invention is described more fully below.In the following detailed description, it proposes
Many concrete details, so as to complete understanding of the present invention.But for those of ordinary skill in the art, very bright
Aobvious, the present invention can also be implemented in the case where not needing these details.Below to the description of embodiment
Just for the sake of being better understood by showing example of the invention to the present invention.The present invention is not limited to presented below to appoint
What specific setting and method, but cover all product structures covered without departing from the spirit of the invention, side
Any improvement of method, replacement etc..
In each attached drawing and following description, well known structure and technology is not shown, is caused to avoid to the present invention
It is unnecessary fuzzy.
A kind of structure is simply to the inlet device of raising centrifugal pump self-priming performance and anti-cavitation ability, specific implementation
Such as shown in Fig. 1, including integral type inducer impeller inducer 1, pump cover 2, injection pipe 3；Pump cover 2 is provided with oil return opening 9 and oil return pipe 7, will
The pressurized high-pressure fluid of integral type inducer impeller inducer 1 leads back entrance, and sprays high-speed jet by the nozzle 5 of injection pipe 3,
Local depression is formed, enters trunnion 6 to roll up and inhale 4 surrounding fluid of mixing section formation mixed flow, thus improves centrifugal pump inlet
Suction capacity.
The setting of trunnion 6 should be grown as far as possible, so that high-speed jet and low pressure mixed flow are sufficiently carried out energy exchange, be made
Fluid velocity is gradually balanced, is converted into potential energy by kinetic energy and obtains higher static pressure, and further increase static pressure by diffuser 8, i.e.,
Available net positive suction head NPSHa is improved, to improve the anti-cavitation ability of centrifugal pump inlet.
Injection pipe 3 is assemblied in the input end of pump cover 2 by way of force fit, and is sealed by sealing ring.Injection pipe
3 areole aperture should be closely sized to oil return pipe, until gradually becoming smaller at nozzle 5, to reduce the flow losses of fluid.Spray
The shape of mouth 5 is gradual shrinkage, and orifice diameter is mounted on oil inlet center having a size of 3.5mm -4mm.
8 conical surface of diffuser of pump cover 2 should be consistent with the cone structure form of integral type inducer impeller inducer 1, and needs to guarantee
With small gap, to reduce leakage.
Size, that is, recirculating oil quantity of oil return opening 9 is determined jointly according to requirements such as the working efficiency of centrifugal pump and import step conditions
Fixed, 7 caliber size of oil return pipe is consistent with oil return opening.
The diameter of section of oil return pipe 7 is 6mm-7mm, and length is about 2 length 5/6 of pump cover, and shape is round or oval.
To guarantee to seamlessly transit when runner design, minimize fluid linear loss.
Finally it should be noted that: the above embodiments are merely illustrative of the technical solutions of the present invention, but protection of the invention
Range is not limited thereto, and anyone skilled in the art in the technical scope disclosed by the present invention, can be thought easily
It is modified or replaceed to various equivalent, these, which are modified or replaceed, should all be included within the scope of the present invention.
Claims (9)
1. a kind of fuel inlet device for improving centrifugal pump suction capacity, it is characterised in that: the fuel inlet device includes
Integral type inducer impeller inducer (1), pump cover (2), injection pipe (3)；Pump cover (2) is divided into three sections since entrance: first segment is mixing
Section (4), centre are trunnion (6), and third section is the diffuser (8) of toroidal；Running through positioned at the inside of pump cover (2) has oil return pipe
(7), oil return pipe (7) is connected to injection pipe (3), forms drainback passage；
The integral type inducer impeller inducer (1) is mounted on the horn mouth end face of diffuser (8)；
Injection pipe (3) sealing is assemblied in the mixing section (4) of pump cover (2).
2. the fuel inlet device according to claim 1 for improving centrifugal pump suction capacity, it is characterised in that: the one
Formula inducer impeller inducer (1) is consistent with the flared end face cone face structure type of diffuser (8).
3. the fuel inlet device according to claim 2 for improving centrifugal pump suction capacity, it is characterised in that: the one
The gap of the horn mouth end face of formula inducer impeller inducer (1) and diffuser (8) is 0.2-0.4mm.
4. the fuel inlet device according to claim 2 for improving centrifugal pump suction capacity, it is characterised in that: the injection
Pipe (3) is sealed by way of force fit to be assemblied in pump cover (2), and is sealed by sealing ring.
5. the fuel inlet device according to claim 1 for improving centrifugal pump suction capacity, it is characterised in that: the trunnion
(6) length is the 1/3-1/2 of pump cover (2) length.
6. the fuel inlet device according to any one of claims 1 to 5 for improving centrifugal pump suction capacity, feature exist
In: the oil return opening (9) is arranged on pump cover (2) and inducer position corresponding with impeller intersection.
7. the fuel inlet device according to any one of claims 1 to 5 for improving centrifugal pump suction capacity, feature exist
In: oil return pipe (7) section is circle.
8. the fuel inlet device according to any one of claims 1 to 5 for improving centrifugal pump suction capacity, feature exist
In: injection pipe (3) material is steel.
9. the fuel inlet device according to any one of claims 1 to 5 for improving centrifugal pump suction capacity, feature exist
In: it is described pump cover (2) material be aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910762081.1A CN110469542A (en) | 2019-08-16 | 2019-08-16 | A kind of fuel inlet device improving centrifugal pump suction capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910762081.1A CN110469542A (en) | 2019-08-16 | 2019-08-16 | A kind of fuel inlet device improving centrifugal pump suction capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110469542A true CN110469542A (en) | 2019-11-19 |
Family
ID=68511110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910762081.1A Pending CN110469542A (en) | 2019-08-16 | 2019-08-16 | A kind of fuel inlet device improving centrifugal pump suction capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110469542A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412815A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Fuel oil supercharging device integrated with oil return path |
| CN112610536A (en) * | 2020-12-11 | 2021-04-06 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Anti cavitation structure of fuel pump |
| FR3117554A1 (en) | 2020-12-15 | 2022-06-17 | IFP Energies Nouvelles | self-priming pump |
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|---|---|---|---|---|
| US4101246A (en) * | 1974-11-26 | 1978-07-18 | Kobe, Inc. | Vortex jet pump |
| US5385447A (en) * | 1993-03-26 | 1995-01-31 | Marine Pollution Control | Axial flow pump for debris-laden oil |
| CN102287398A (en) * | 2011-07-25 | 2011-12-21 | 中国航天科技集团公司第六研究院第十一研究所 | Small-sized high-speed centrifugal pump suitable for flow regulation in wide range |
| CN204025070U (en) * | 2014-06-12 | 2014-12-17 | 辽宁格瑞特泵业有限公司 | Jetted self-priming device |
| CN104533846A (en) * | 2014-12-16 | 2015-04-22 | 中国航天科技集团公司第六研究院第十一研究所 | High pressure annular jet pump suitable for pumping pressure type supply system |
| CN104564699A (en) * | 2014-12-05 | 2015-04-29 | 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 pump with ejecting supercharging device |
| CN105909567A (en) * | 2016-06-15 | 2016-08-31 | 江苏大学 | Jet device capable of improving cavitation performance of jet type centrifugal pump |
| CN108131335A (en) * | 2016-11-30 | 2018-06-08 | 中国航发商用航空发动机有限责任公司 | Aircraft engine fuel oil system and its larynx mouth are pumped away from variable-spray |
| CN108916057A (en) * | 2018-09-21 | 2018-11-30 | 兰州理工大学 | High-speed centrifugal pump with pumped (conveying) medium self-circulation system |
-
2019
- 2019-08-16 CN CN201910762081.1A patent/CN110469542A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101246A (en) * | 1974-11-26 | 1978-07-18 | Kobe, Inc. | Vortex jet pump |
| US5385447A (en) * | 1993-03-26 | 1995-01-31 | Marine Pollution Control | Axial flow pump for debris-laden oil |
| CN102287398A (en) * | 2011-07-25 | 2011-12-21 | 中国航天科技集团公司第六研究院第十一研究所 | Small-sized high-speed centrifugal pump suitable for flow regulation in wide range |
| CN204025070U (en) * | 2014-06-12 | 2014-12-17 | 辽宁格瑞特泵业有限公司 | Jetted self-priming device |
| CN104564699A (en) * | 2014-12-05 | 2015-04-29 | 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 pump with ejecting supercharging device |
| CN104533846A (en) * | 2014-12-16 | 2015-04-22 | 中国航天科技集团公司第六研究院第十一研究所 | High pressure annular jet pump suitable for pumping pressure type supply system |
| CN105909567A (en) * | 2016-06-15 | 2016-08-31 | 江苏大学 | Jet device capable of improving cavitation performance of jet type centrifugal pump |
| CN108131335A (en) * | 2016-11-30 | 2018-06-08 | 中国航发商用航空发动机有限责任公司 | Aircraft engine fuel oil system and its larynx mouth are pumped away from variable-spray |
| CN108916057A (en) * | 2018-09-21 | 2018-11-30 | 兰州理工大学 | High-speed centrifugal pump with pumped (conveying) medium self-circulation system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412815A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Fuel oil supercharging device integrated with oil return path |
| CN112610536A (en) * | 2020-12-11 | 2021-04-06 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Anti cavitation structure of fuel pump |
| CN112610536B (en) * | 2020-12-11 | 2023-05-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Anti cavitation structure of fuel pump |
| FR3117554A1 (en) | 2020-12-15 | 2022-06-17 | IFP Energies Nouvelles | self-priming pump |
| WO2022128545A1 (en) | 2020-12-15 | 2022-06-23 | IFP Energies Nouvelles | Self-priming pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191119 |
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| RJ01 | Rejection of invention patent application after publication |