CN112524640A - Secondary distribution oil supply structure - Google Patents
Secondary distribution oil supply structure Download PDFInfo
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- CN112524640A CN112524640A CN202011378182.8A CN202011378182A CN112524640A CN 112524640 A CN112524640 A CN 112524640A CN 202011378182 A CN202011378182 A CN 202011378182A CN 112524640 A CN112524640 A CN 112524640A
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- oil
- fuel
- thrower
- oil supply
- secondary distribution
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a secondary distribution oil supply structure, and belongs to the technical field of engines. Compared with the prior art, the fuel supply structure adopts a secondary fuel distribution mode, so that the uniformity of an engine fuel supply system is improved, and the uniformity of a combustion chamber outlet temperature field is improved.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a secondary distribution oil supply structure.
Background
The oil thrower is widely applied to the combustion chamber of a small and medium-sized engine for fuel oil atomization. Compared with a conventional nozzle, the oil thrower has the advantages of low oil supply pressure, simple and compact structure, light weight, good high-altitude atomization performance and the like; the oil slinger has the advantage of being simple and quick to start relative to the evaporator tube. The oil thrower is generally fixed to the rotor of the engine and rotates with the rotor when the engine is in operation, and the fuel oil is thrown out centrifugally under the action of centrifugal force to be atomized. The machining precision and the oil supply mode of the oil thrower directly influence the uniformity of fuel flow distribution. Non-uniform fuel flow can cause localized hot spots and abnormal noise during engine operation with catastrophic consequences to the turbine blades.
Most oil throwers adopt a central oil supply mode, namely, fuel oil enters the oil thrower from an engine shaft and is thrown out at a high speed through an oil injection hole. For the central oil supply mode, the distribution of the flow of each oil injection hole mainly depends on an internal fuel flow channel, the flow of the fuel is distributed only once, and the processing precision has great influence on the uniformity of the fuel. Meanwhile, in the central oil supply mode, the oil supply pipeline of the fuel oil is long, so that the response of the oil thrower disc system to the change of the fuel oil flow is slow.
It can be seen that the existing oil supply system has the following drawbacks:
1) the uniformity of oil supply is poor due to primary fuel oil distribution, the distribution of the flow of each oil injection hole mainly depends on an internal fuel oil flow channel, and the influence of the processing precision on the uniformity of the fuel oil is large;
2) the fuel supply line is long and the response of the oil thrower system to the change of the fuel flow is slow.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to effectively improve the uniformity of fuel atomization and improve the response capability of an oil supply system to the change of fuel pressure.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a secondary distribution oil supply structure, including: the oil supply assembly 1 and the oil thrower 2;
the oil supply assembly 1 is of a double-ring cavity structure, and two ring cavities are connected through a plurality of axial fuel oil channels; the oil inlet side annular cavity is directly connected with a fuel main pipe, and the end surface of the oil outlet side annular cavity is provided with inclined oil spraying holes 3 which are uniformly distributed in the circumferential direction;
the oil thrower 2 is a blade type centrifugal oil thrower, radial oil injection holes are uniformly distributed on the side surface of the oil thrower in the circumferential direction, the section of the oil thrower 2 is U-shaped to form an annular groove, an oil cavity capable of temporarily gathering fuel oil is arranged at the bottom of the U-shaped annular groove, and blades are arranged on the side surface of the oil cavity;
and a certain distance is reserved between the inclined oil spraying hole 3 of the oil supply assembly 1 and the inner side wall surface of the oil thrower 2.
Preferably, the inclined oil spray hole 3 has an inclination angle of 45 °.
Preferably, the number of the inclined oil spray holes 3 is 18.
Preferably, the interval between the inclined oil spraying hole 3 of the oil supply assembly 1 and the inner side wall surface of the oil thrower 2 is 1-2 mm.
Preferably, the number of said axial fuel channels is three.
Preferably, the fuel supply assembly 1 is mounted on the combustor casing.
Preferably, the oil slinger 2 is connected to the engine shaft for rotation therewith.
The invention also provides a working method of the secondary distribution oil supply structure, which comprises the following steps: fuel oil flows into a fuel oil main pipe connected with an annular cavity on the oil inlet side of the oil supply assembly 1, passes through an axial fuel oil channel and is obliquely sprayed into an oil cavity of an oil thrower 2 rotating at a high speed through an oblique oil spraying hole 3 on the end surface of the annular cavity on the oil outlet side; the fuel oil is distributed once in the fuel supply assembly 1 and reaches a certain uneven degree before entering the oil thrower 2; after the fuel oil flows into the oil thrower 2, the fuel oil flows to the U-shaped annular groove of the oil thrower 2 under the combined action of the centrifugal force of the oil thrower 2 and the blades of the oil thrower to distribute the secondary fuel oil, and finally the secondary fuel oil is thrown out through the radial fuel injection holes.
The invention also provides an application of the secondary distribution oil supply structure in the combustion chamber of the engine.
The invention also provides an application of the secondary distribution oil supply structure in an engine.
(III) advantageous effects
The invention adopts a split type oil supply assembly-oil thrower oil supply mode, fuel oil is firstly distributed in the oil supply assembly for the first time, and then is distributed on the side surface of the oil thrower oil, thereby effectively improving the uniformity of an engine oil supply system and further improving the quality of an outlet temperature field of an engine combustion chamber; the inclined oil spraying hole on the end face of the oil supply assembly is adopted, so that fuel oil is not sprayed to the surface of the oil thrower vertically any more, the problem of fuel oil splashing can be effectively avoided, and the influence of gravity on fuel oil distribution is eliminated; the oil supply assembly is adopted for directly supplying oil, and the oil supply system has quick response to the pressure change of fuel oil; the blade type centrifugal oil thrower is adopted, so that the radial force borne by fuel oil is increased, the low-rotation-speed fuel oil atomization quality is improved, the splashing of the fuel oil in the oil thrower is inhibited, and the problem of circumferential fuel oil unevenness frequently occurring in the hole type oil thrower is solved.
Drawings
FIG. 1 is a schematic structural view of an oil supply structure according to the present invention;
FIG. 2 is a schematic view of an oil supply assembly according to the present invention;
fig. 3 is a structural schematic diagram of a vane type centrifugal oil slinger in the invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The invention provides an oil supply assembly-oil throwing disc oil supply structure which has secondary fuel oil distribution and a short fuel oil supply path. The fuel supply structure can effectively improve the uniformity of fuel atomization and simultaneously improve the response capability of the fuel supply system to the change of fuel pressure.
As shown in fig. 1 to 3, the invention provides a secondary distribution oil thrower structure, which is composed of an oil supply assembly 1 and an oil thrower 2;
the oil supply assembly 1 is of a double-ring cavity structure, and two ring cavities are connected through three axial fuel oil channels; the oil inlet side ring cavity is directly connected with a fuel main pipe, and the end surface of the oil outlet side ring cavity is provided with 18 inclined oil spraying holes 3 which are uniformly distributed in the circumferential direction and have an inclination angle of 45 degrees;
the oil thrower 2 is a blade type centrifugal oil thrower, radial oil injection holes are uniformly distributed on the side surface of the oil thrower in the circumferential direction, the section of the oil thrower 2 is U-shaped to form an annular groove, an oil cavity capable of temporarily gathering fuel oil is arranged at the bottom of the U-shaped annular groove, and blades are arranged on the side surface of the oil cavity;
the position relation of the oil supply assembly 1 and the oil thrower 2 is shown in figure 1, the distance between an inclined oil spraying hole 3 of the oil supply assembly 1 and the inner side wall surface of the oil thrower 2 is about 1-2 mm, and the position relation is ensured by depending on the assembly relation of an engine.
The working principle of the secondary distribution oil thrower structure is as follows;
the oil supply unit 1 is mounted on a combustion chamber casing, and the oil thrower 2 is connected to the engine shaft and is rotatable therewith. Fuel oil flows in from a fuel oil main pipe connected with an annular cavity on the oil inlet side of the oil supply assembly 1, passes through an axial fuel oil channel and is obliquely sprayed into an oil cavity of the oil thrower 2 rotating at a high speed by 45 degrees through an oblique oil spraying hole 3 on the end surface of the annular cavity on the oil outlet side; the fuel oil is distributed once in the fuel supply assembly 1 and reaches a certain uneven degree before entering the oil thrower 2; because the oil supply assembly 1 adopts the inclined oil spraying hole 3 arranged on the end surface, fuel oil is not sprayed to the surface of the oil thrower 2 vertically any more, the problem of fuel oil splashing can be effectively avoided, and the influence of gravity on fuel oil distribution is eliminated; after the fuel oil flows into the oil thrower 2, the fuel oil flows to the U-shaped annular groove of the oil thrower 2 under the combined action of the centrifugal force of the oil thrower 2 and the blades of the oil thrower 2 to distribute the secondary fuel oil, and finally the secondary fuel oil is thrown out at a high speed through the radial fuel injection holes. The oil thrower 2 is designed into a blade type centrifugal oil thrower, so that the radial force borne by fuel oil can be increased, the low-rotation-speed fuel oil atomization quality is improved, the splashing of the fuel oil in the oil thrower is inhibited, and the problem of circumferential fuel oil unevenness frequently occurring in a hole type oil thrower is solved; after the fuel is distributed twice, the atomization uniformity of the fuel is improved, and the purpose of improving the quality of the outlet temperature field of the combustion chamber is further achieved.
It can be seen that the present invention has the following advantages:
1) the split type oil supply assembly-oil thrower plate oil supply mode is adopted, fuel oil is firstly distributed in the oil supply assembly for the first time, and then is distributed on the side face of the oil thrower plate for the second time, so that the uniformity of an engine oil supply system is effectively improved, and the quality of an outlet temperature field of an engine combustion chamber is improved.
2) By adopting the inclined oil spraying hole on the end surface of the oil supply assembly, the fuel oil is not sprayed to the surface of the oil thrower vertically any more, so that the problem of fuel oil splashing can be effectively avoided, and the influence of gravity on fuel oil distribution is eliminated.
3) The oil supply assembly is adopted for directly supplying oil, and the oil supply system has quick response to the pressure change of fuel oil.
4) The blade type centrifugal oil thrower is adopted, so that the radial force borne by fuel oil is increased, the low-rotation-speed fuel oil atomization quality is improved, the splashing of the fuel oil in the oil thrower is inhibited, and the problem of circumferential fuel oil unevenness frequently occurring in the hole type oil thrower is solved.
Compared with the prior art, the fuel supply structure adopts a secondary fuel distribution mode, so that the uniformity of an engine fuel supply system is improved, and the uniformity of a combustion chamber outlet temperature field is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A secondary distribution oil supply structure, comprising: the oil-saving device comprises an oil supply assembly (1) and an oil thrower (2);
the oil supply assembly (1) is of a double-ring cavity structure, and the two ring cavities are connected through a plurality of axial fuel oil channels; the oil inlet side annular cavity is directly connected with a fuel main pipe, and the end surface of the oil outlet side annular cavity is provided with inclined oil spraying holes (3) which are uniformly distributed in the circumferential direction;
the oil thrower (2) is a blade type centrifugal oil thrower, radial oil spray holes are uniformly distributed on the side surface of the oil thrower in the circumferential direction, the section of the oil thrower (2) is U-shaped to form an annular groove, an oil cavity capable of temporarily gathering fuel oil is formed at the bottom of the U-shaped annular groove, and blades are arranged on the side surface of the oil cavity;
and a certain distance is reserved between the inclined oil spraying hole (3) of the oil supply assembly (1) and the inner side wall surface of the oil thrower (2).
2. The secondary distribution oil supply structure according to claim 1, wherein the inclined oil spray hole (3) has an inclination angle of 45 °.
3. The secondary distribution oil supply structure according to claim 2, wherein the number of the slant oil spray holes (3) is 18.
4. The secondary distribution oil supply structure as claimed in claim 3, wherein the inclined oil jet hole (3) of the oil supply unit (1) is spaced from the inner side wall surface of the oil slinger (2) by 1-2 mm.
5. The secondary distribution fuel supply structure of claim 4 wherein said axial fuel channels are three.
6. The secondary distribution oil supply structure as claimed in claim 1, wherein the oil supply unit (1) is mounted on a combustor case.
7. The secondary distribution oil supply structure as set forth in claim 6, wherein said oil thrower (2) is connected to the engine shaft to be rotatable therewith.
8. An operating method of the secondary distribution oil supply structure according to any one of claims 1 to 7, comprising the steps of: fuel oil flows into a fuel oil main pipe connected with an oil inlet side annular cavity of the oil supply assembly (1), passes through an axial fuel oil channel and is obliquely sprayed into an oil cavity of a high-speed rotating oil thrower (2) through an oblique oil spraying hole (3) on the end surface of the oil outlet side annular cavity; the fuel oil is distributed once in the fuel supply assembly (1) and reaches a certain non-uniform degree before entering the oil thrower (2); after the fuel oil flows into the oil thrower disc (2), the fuel oil flows to the U-shaped annular groove of the oil thrower disc (2) under the combined action of the centrifugal force of the oil thrower disc (2) and the blades of the oil thrower disc to distribute the secondary fuel oil, and finally the secondary fuel oil is thrown out through the radial fuel injection holes.
9. Use of the secondary distribution oil supply structure of any one of claims 1 to 7 in a combustion chamber of an engine.
10. Use of the secondary distribution oil supply structure of any one of claims 1 to 7 in an engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378182.8A CN112524640A (en) | 2020-11-30 | 2020-11-30 | Secondary distribution oil supply structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378182.8A CN112524640A (en) | 2020-11-30 | 2020-11-30 | Secondary distribution oil supply structure |
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| Publication Number | Publication Date |
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| CN112524640A true CN112524640A (en) | 2021-03-19 |
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| CN202011378182.8A Pending CN112524640A (en) | 2020-11-30 | 2020-11-30 | Secondary distribution oil supply structure |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794754A (en) * | 1987-06-22 | 1989-01-03 | Sundstrand Corporation | Low cost annular combustor |
| CN101818910A (en) * | 2010-03-24 | 2010-09-01 | 北京航空航天大学 | Miniature gas turbine combustion chamber |
| CN102384489A (en) * | 2011-06-28 | 2012-03-21 | 北京动力机械研究所 | Small-sized annular combustion chamber with high-capacity heat intensity |
| CN202545021U (en) * | 2011-12-13 | 2012-11-21 | 哈尔滨东安发动机（集团）有限公司 | Fuel oil spraying device of combustion gas turbine |
| CN105698175A (en) * | 2014-11-11 | 2016-06-22 | 通用电气公司 | Premixing nozzle with integral liquid evaporator |
| US20170184307A1 (en) * | 2015-12-29 | 2017-06-29 | Pratt & Whitney Canada Corp. | Fuel injector for fuel spray nozzle |
| CN108151066A (en) * | 2017-11-24 | 2018-06-12 | 北京动力机械研究所 | Big extension atomization cone angle disc structure |
| CN111306185A (en) * | 2019-12-17 | 2020-06-19 | 重庆江增船舶重工有限公司 | Semi-floating radial bearing structure of axial flow turbine supercharger |
| CN111578313A (en) * | 2020-05-25 | 2020-08-25 | 中国航发湖南动力机械研究所 | Fuel oil pre-distribution device for pneumatic auxiliary atomization |
| CN111609424A (en) * | 2020-04-24 | 2020-09-01 | 西北工业大学 | Combined oil thrower |
-
2020
- 2020-11-30 CN CN202011378182.8A patent/CN112524640A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794754A (en) * | 1987-06-22 | 1989-01-03 | Sundstrand Corporation | Low cost annular combustor |
| CN101818910A (en) * | 2010-03-24 | 2010-09-01 | 北京航空航天大学 | Miniature gas turbine combustion chamber |
| CN102384489A (en) * | 2011-06-28 | 2012-03-21 | 北京动力机械研究所 | Small-sized annular combustion chamber with high-capacity heat intensity |
| CN202545021U (en) * | 2011-12-13 | 2012-11-21 | 哈尔滨东安发动机（集团）有限公司 | Fuel oil spraying device of combustion gas turbine |
| CN105698175A (en) * | 2014-11-11 | 2016-06-22 | 通用电气公司 | Premixing nozzle with integral liquid evaporator |
| US20170184307A1 (en) * | 2015-12-29 | 2017-06-29 | Pratt & Whitney Canada Corp. | Fuel injector for fuel spray nozzle |
| CN108151066A (en) * | 2017-11-24 | 2018-06-12 | 北京动力机械研究所 | Big extension atomization cone angle disc structure |
| CN111306185A (en) * | 2019-12-17 | 2020-06-19 | 重庆江增船舶重工有限公司 | Semi-floating radial bearing structure of axial flow turbine supercharger |
| CN111609424A (en) * | 2020-04-24 | 2020-09-01 | 西北工业大学 | Combined oil thrower |
| CN111578313A (en) * | 2020-05-25 | 2020-08-25 | 中国航发湖南动力机械研究所 | Fuel oil pre-distribution device for pneumatic auxiliary atomization |
Non-Patent Citations (1)
| Title |
|---|
| 齐铭: "《制冷附件》", 30 September 1992, 航空工业出版社 * |
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Application publication date: 20210319 |