CN112412815A - Fuel oil supercharging device integrated with oil return path - Google Patents
Fuel oil supercharging device integrated with oil return path Download PDFInfo
- Publication number
- CN112412815A CN112412815A CN202011192296.3A CN202011192296A CN112412815A CN 112412815 A CN112412815 A CN 112412815A CN 202011192296 A CN202011192296 A CN 202011192296A CN 112412815 A CN112412815 A CN 112412815A
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- CN
- China
- Prior art keywords
- fuel
- oil
- inducer
- shell
- groove
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
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- 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
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- 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
- F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
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- 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
- F04D29/4293—Details of fluid inlet or outlet
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention may relate to the technical field of aircraft engines, aircraft engine fuel control systems, fuel supercharging devices and the like, and particularly relates to a fuel supercharging device integrated with an oil return path. The device comprises a shell, an inducer and an impeller, wherein the fuel enters the impeller through the inducer to be pressurized and then is output; the inducer and the impeller are positioned in the shell, the inner surface of the shell is provided with a groove, and the groove of the shell is provided with an oil hole communicated with an oil return path; at least one part of the groove is positioned in the area where the inducer is positioned along the axial direction. The device further comprises a bushing; the bushing is axially mounted on the inner surface of the shell and forms an oil chamber with the groove. The technical scheme discloses a fuel oil supercharging device integrated with an oil return path. And the fuel oil return circuit integrated by the device is arranged in the area where the inducer is located, and the design avoids increasing the structural size of the existing supercharging device to the maximum extent.
Description
Technical Field
The invention may relate to the technical field of aircraft engines, aircraft engine fuel control systems, fuel supercharging devices and the like, and particularly relates to a fuel supercharging device integrated with an oil return path.
Background
At present, the existing fuel oil supercharging device and an oil return device of an engine fuel oil system are both split, as shown in figure 1, the oil return device of the engine fuel oil system is connected with the oil return of each fuel oil control accessory through each connecting pipeline, and the oil return is sent to the fuel oil supercharging device through a pipeline after being rectified. The structure has more pipelines, increases difficulty in the originally scarce space of the engine, is easily influenced by factors such as vibration and the like during the operation of the engine, and has the risks of oil leakage at each joint surface, pipeline fracture and the like.
Disclosure of Invention
The technical problems solved by the invention are as follows: the fuel oil supercharging device integrated with the oil return path is provided, the structure of the oil return and supercharging device in the prior art is simplified, and the reliability of the whole system is improved.
The technical scheme of the invention is as follows: a fuel oil supercharging device comprises a shell, an inducer and an impeller, wherein fuel oil enters the impeller through the inducer to be supercharged and then is output;
the inducer and the impeller are positioned in the shell, the inner surface of the shell is provided with a groove, and the groove of the shell is provided with an oil hole communicated with an oil return path;
at least one part of the groove is positioned in the area where the inducer is positioned along the axial direction. The technical scheme discloses a fuel oil supercharging device integrated with an oil return path. And the fuel oil return circuit integrated by the device is arranged in the area where the inducer is located, and the design avoids increasing the structural size of the existing supercharging device to the maximum extent. Compared with the prior art, the technical scheme has the advantages of simple structure, small volume, simplified connection structure and improved reliability of the whole system.
Preferably, the device further comprises a bushing; the bushing is axially mounted on the inner surface of the shell and forms an oil chamber with the groove. The technical scheme further discloses an optimized oil return path design, pressure impact of oil return on an inducer is avoided through the design, and stability and reliable operation of the whole system are guaranteed.
Preferably, the casing is provided with an annular profile, the annular profile is in clearance fit with the inner surface of the bushing, and the clearance is communicated with the oil cavity and the device inner cavity to form a fuel outlet of the oil cavity. The technical scheme discloses another core technical characteristic, and the matching mode of the annular molded surface and the bush in the technical characteristic determines the form and the direction of a fuel outlet on one hand and discloses the forming mode of an oil cavity on the other hand.
Preferably, one end of the bushing forms a clearance fit with the annular profile and the other end of the bushing seals with the housing. The technical scheme further limits the structural form of the oil cavity, indicates that the oil cavity forms an oil return outlet at the fuel inlet end of the shell, improves the implementability of the scheme, and ensures the technical effect of the whole technical scheme.
Preferably, the clearance fit is formed at the liner fuel inlet end in the direction of fuel flow. The technical scheme further limits the structural form of the oil cavity, indicates that the oil cavity forms an oil return outlet at the fuel inlet end of the shell, improves the implementability of the scheme, and ensures the technical effect of the whole technical scheme.
Preferably, according to the fuel flow direction, a fuel outlet of the oil cavity formed by clearance fit is positioned at the front end of the inducer. The technical scheme further illustrates the position of the oil cavity outlet, and the position avoids the impact of return oil on the inducer so as to prevent cavitation from being formed at the root of the inducer.
Preferably, the distance between the fuel outlet of the oil cavity and the front end face of the inducer is 2 mm-2.3 mm. Through calculation and a large number of experimental verifications, the technical scheme provides the most structural parameters, improves the implementability of the scheme and ensures the overall technical effect of the scheme.
Preferably, the housing is provided with a plurality of oil holes communicated with the oil return path. The technical scheme further discloses corresponding technical content, the implementability of the scheme is improved, and the overall technical effect of the scheme is guaranteed.
Preferably, the groove on the shell is an annular groove. The technical scheme further discloses corresponding technical content, the implementability of the scheme is improved, and the overall technical effect of the scheme is guaranteed.
Preferably, an oil seal is further arranged on the shell of the device, and a one-way valve is arranged in the oil seal. This technical scheme further discloses an integrated functional structure on the casing, and this structure seals with the external world because of the effect of check valve when normal operating. When the engine is stored, oil seal oil is injected into the engine by using the oil seal.
Drawings
FIG. 1 is a schematic structural diagram of a fuel oil return switching device of a fuel oil supercharging device and an engine fuel oil system in the prior art;
FIG. 2 is a partial cross-sectional view of a supercharging assembly according to the present invention;
fig. 3 is a right side view of the supercharging assembly of the present invention.
The symbols in the figures are as follows: 1-1 is a supercharging device, 1-2 is an oil return switching device, 2-1 is an oil return path, 2-2 is a bushing, 2-3 is an impeller, 2-4 is an inducer, 2-5 is an oil return groove, 2-6 is an oil return cavity outlet, 2-7 is an oil seal, and 2-8 is a shell fuel inlet edge.
Detailed Description
A fuel oil supercharging device comprises a shell, an inducer and an impeller, wherein fuel oil enters the impeller through the inducer to be supercharged and then is output; the inducer and the impeller are positioned in the shell, the inner surface of the shell is provided with a groove, and the groove of the shell is provided with an oil hole communicated with an oil return path; at least one part of the groove is positioned in the area where the inducer is positioned along the axial direction. The device further comprises a bushing; the bushing is axially mounted on the inner surface of the shell and forms an oil chamber with the groove. The oil cavity is communicated with the device inner cavity through a gap, and a fuel outlet of the oil cavity is formed. One end of the lining is in clearance fit with the annular profile, and the other end of the lining is sealed with the shell. The clearance fit is formed at the liner fuel inlet end in the fuel flow direction. And according to the flowing direction of the fuel, a fuel outlet of an oil cavity formed by clearance fit is positioned at the front end of the inducer. The distance between the fuel outlet of the oil cavity and the front end face of the inducer is 2 mm-2.3 mm. The oil hole that communicates oil return way on the casing is a plurality of. The groove on the shell is an annular groove. An oil seal is further arranged on the shell of the device, and a one-way valve is arranged in the oil seal.
Examples
As shown in figures 1-3, the scheme is that aircraft fuel enters from an inlet of a fuel oil supercharging device, the fuel oil is supercharged through an inducer 2-4 and an impeller 2-3, return oil of engine fuel oil accessories is collected, and the return oil is used again after being supercharged. The oil return of the engine fuel accessories enters the oil return grooves 2-5 through oil return paths 2-1 on the inner surface of the shell, and the quantity of the oil return paths is determined according to requirements. The position of the groove 2-5 is at least partially coincided with the inducer 2-4 along the axial direction. In order to avoid the impact of high-pressure and high-temperature return oil on the inducer 2-4 and the impeller 2-3 and reduce the reliability of the inducer 2-4 and the impeller 2-3, a bushing 2-2 is arranged between the oil return groove 2-5 and the inducer 2-4 for stabilizing the flow, so that an oil return cavity is formed between the bushing 2-2 and the shell oil return groove 2-5. Meanwhile, the shell fuel inlet edge 2-8 is extended, so that the outer edge of the shell fuel inlet edge 2-8 and the inner surface of the inlet at the left end of the bush 2-2 form an oil return cavity outlet 2-6 shown in figure 2. In order to ensure that high-temperature and high-pressure return oil does not flow backwards, the outlet 2-6 of the oil return cavity needs to be determined to have a certain length, but the distance between the right end face of the fuel inlet edge 2-8 of the shell and the inducer 2-2 is 2 mm-2.3 mm; meanwhile, in order not to influence the supercharging efficiency of the supercharging device, the clearance between the inner ring of the bush 2-2 and the outer edge of the inducer 2-4 is required to be as small as possible. The right end of the bush 2-2 is fixed on the shell for sealing.
In addition, the oil seal 2-7 is integrated on the shell to be used for oil sealing the engine, the oil seal 2-7 is of a one-way valve structure, the situation that fuel oil or return oil leaks cannot happen due to the sealing effect of the one-way valve when the product normally works, when the engine or the product needs to be packaged and stored in a warehouse, the rest interfaces of the product are sealed, and only oil seal oil is injected from the oil seal 2-7.
Claims (10)
1. A fuel oil supercharging device comprises a shell, an inducer and an impeller, wherein fuel oil enters the impeller through the inducer to be supercharged and then is output;
the device is characterized in that the inducer and the impeller are positioned in a shell, a groove is formed in the inner surface of the shell, and an oil hole communicated with an oil return path is formed in the position of the groove of the shell;
at least one part of the groove is positioned in the area where the inducer is positioned along the axial direction.
2. A fuel booster as claimed in claim 1, characterized in that said device further comprises a liner; the bushing is axially mounted on the inner surface of the shell and forms an oil chamber with the groove.
3. A fuel pressurizing assembly as set forth in claim 2 wherein said housing has an annular profile, said annular profile being in clearance fit with an inner surface of said bushing, said clearance communicating between said fuel chamber and said interior of said assembly to define a fuel outlet from said fuel chamber.
4. A fuel booster as claimed in claim 3 wherein one end of the sleeve is in clearance fit with the annular profile and the other end of the sleeve is sealed to the housing.
5. A fuel pressurisation device according to claim 4, wherein the clearance fit is formed at the liner fuel inlet end in the direction of fuel flow.
6. A fuel supercharging arrangement according to claim 5, wherein the fuel outlet of the oil chamber formed by said clearance fit is located at the forward end of the inducer, in the direction of fuel flow.
7. A fuel supercharging arrangement according to claim 6, wherein the fuel outlet of the fuel chamber is spaced from the inducer front face by a distance of from 2mm to 2.3 mm.
8. A fuel pressure increasing device according to any one of claims 1 to 7, wherein the housing has a plurality of oil holes communicating with the oil return path.
9. A fuel pressurising device according to any of claims 1 to 7, wherein the recess in the housing is an annular groove.
10. A fuel pressurizing device according to any one of claims 1-7, wherein an oil seal is provided on the housing of the device, and a check valve is provided in the oil seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192296.3A CN112412815B (en) | 2020-10-30 | 2020-10-30 | Fuel oil supercharging device integrated with oil return path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192296.3A CN112412815B (en) | 2020-10-30 | 2020-10-30 | Fuel oil supercharging device integrated with oil return path |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112412815A true CN112412815A (en) | 2021-02-26 |
| CN112412815B CN112412815B (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011192296.3A Active CN112412815B (en) | 2020-10-30 | 2020-10-30 | Fuel oil supercharging device integrated with oil return path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412815B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3986791A (en) * | 1974-04-01 | 1976-10-19 | Sigma Lutin, Narodni Podnik | Hydrodynamic multi-stage pump |
| US6619935B1 (en) * | 1999-07-24 | 2003-09-16 | Honeywell Ag | Mixing valve with axially segmented stator windings for axially positioning a control element for controlling the fluid connection between inlets and outlets |
| 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 |
| CN106567866A (en) * | 2016-11-04 | 2017-04-19 | 西安航空动力控制科技有限公司 | Fuel oil thrust augmentation centrifugal pump resistant to caviation |
| CN110469542A (en) * | 2019-08-16 | 2019-11-19 | 中国航发北京航科发动机控制系统科技有限公司 | A kind of fuel inlet device improving centrifugal pump suction capacity |
-
2020
- 2020-10-30 CN CN202011192296.3A patent/CN112412815B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3986791A (en) * | 1974-04-01 | 1976-10-19 | Sigma Lutin, Narodni Podnik | Hydrodynamic multi-stage pump |
| US6619935B1 (en) * | 1999-07-24 | 2003-09-16 | Honeywell Ag | Mixing valve with axially segmented stator windings for axially positioning a control element for controlling the fluid connection between inlets and outlets |
| 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 |
| CN106567866A (en) * | 2016-11-04 | 2017-04-19 | 西安航空动力控制科技有限公司 | Fuel oil thrust augmentation centrifugal pump resistant to caviation |
| CN110469542A (en) * | 2019-08-16 | 2019-11-19 | 中国航发北京航科发动机控制系统科技有限公司 | A kind of fuel inlet device improving centrifugal pump suction capacity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112412815B (en) | 2022-09-20 |
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