CN101684751A - Fuel cut-off valve of reheat fuel control unit of turbofan engine - Google Patents
Fuel cut-off valve of reheat fuel control unit of turbofan engine Download PDFInfo
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- CN101684751A CN101684751A CN200810068919A CN200810068919A CN101684751A CN 101684751 A CN101684751 A CN 101684751A CN 200810068919 A CN200810068919 A CN 200810068919A CN 200810068919 A CN200810068919 A CN 200810068919A CN 101684751 A CN101684751 A CN 101684751A
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- reheat
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Abstract
The invention provides a fuel cut-off valve which is suitable for aero-engine fuel systems and can delay for a longer time and cut off fuel in sequence. The fuel cut-off valve can control spring forceand the diameter of a flow nipple according to design requirements, thereby achieving functions of lingeringly cutting off reheat bypass, reheat intension and reheat starting oil supply. The fuel cut-off valve of a reheat fuel control unit of a turbofan engine consists of a valve 1, a valve lining 2, a nozzle tip 3, a spring 4 and a sealing rubber cup 5, wherein the valve 1 is arranged in the valve lining 2; the nozzle tip 3 is arranged in a through hole in the middle of the valve 1; the valve 1 is provided with a plurality of through slots; the valve lining 2 is arranged in a shell by interference fit; and the valve lining 2 is provided with oil through holes corresponding to the through slots on the valve 1. The fuel can be respectively led to a control cavity of a metering valve in each area through the oil through holes. The spring 4 is arranged on a spring cavity formed between the top of the valve and the shell, and the airtightness of the spring cavity is ensured by mounting the sealing rubber cup 5 on the valve 1.
Description
Technical field
The present invention relates to a kind of regulator valve, particularly relate to the oil-break valve in the aviation turbofan engine Reheat Fuel Control Unit.
Background technique
The oil-break valve is the core component that the turbofan engine spout adds emergency cut-off in the draught control mechanism, and its function is to satisfy the sequential requirement of the afterburning fuel-cut of motor.
Afterburning emergency switching-off function is that engine nozzle adds the function of draught control mechanism in reinforcing control oil in the aeroengine fuel regulation system.When emergency appears in the afterburning state of motor, by electrical signal in the cabin or manipulation throttle lever, make motor withdraw from afterburning fuel feeding state according to the order of sequence by the pilot.Domestic air mail engine fuel regulating system major part was to adopt the mechanical hydraulic-pressure type controlling method in the past, this controlling method comparative maturity all aspect design, technology and reliability, but the hydraulic actuator that relates to is more, make that the regulator alterability is poor, adjust, maintenance workload is big, the processing request height of part, complex structure, a kind of full powers limit digital and electronic control system is arranged now, can satisfy the control requirement well, need a kind of oil-break valve that can meet the demands in this system.
Summary of the invention
The invention provides a kind of aircraft engine fuel oil system that is applicable to, can reach the oil-break valve that cuts off fuel oil in order than long delay, this oil-break valve can be according to designing requirement, the diameter of Regulation spring power and flow nipple, thus the function that postpones to cut off afterburning outer culvert, afterburning intension, afterburning starting fuel feeding according to the order of sequence finished.
Oil-break valve (see figure 1) of the present invention is by valve 1, valve lining 2, and oil nozzle 3, spring 4 and sealing cup 5 constitute.Valve 1 is loaded in the valve lining 2, and oil nozzle 3 is loaded in the through hole of valve 1 centre; Valve 1 has several communicating groove, oil feeding lines such as corresponding respectively afterburning outer culvert, afterburning intension, afterburning starting, valve 1 is contained in the housing by interference fit, have on the valve lining 2 with valve 1 on the corresponding oil through of each communicating groove, fuel oil can lead to the control chamber of respectively distinguishing metering valve respectively by these oil throughs.Spring 4 is contained in the spring chamber that forms between the top of valve and the housing, guarantees the sealing of spring chambers by sealing cup 5 is installed on valve 1.
Realize that it is that appropriate design valve 1 is with respect to each district initial position at open zero point that the oil-break valve cuts off the key of respectively distinguishing the fuel delivery function according to the order of sequence, thereby accurately determine the length dimension of each communicating groove on the valve lining 2, and lead to the location dimension of respectively distinguishing metering valve control chamber oil circuit hole in the lining 2, the time that the speed that these sizes all move with valve and each oil feeding line cut off is relevant.Fig. 2 is seen in the position of each size, when a is the valve closed condition from the limit on the left location point to lining the length of first communicating groove starting point on 2, when b is the valve closed condition from the limit on the left location point to lining the length of second communicating groove starting point on 2, when c is the valve closed condition from the limit on the left location point to lining the length of the 3rd communicating groove starting point on 2, L1 is the length of first communicating groove, L2 is the length of second communicating groove, L3 is the length of the 3rd communicating groove, a1 is the location dimension of first oil through on the valve lining 2, b1 is the location dimension of second oil through on the valve lining 2, c1 is the location dimension of the 3rd oil through on the valve lining 2, by that analogy.The a that determines, b, the c size can guarantee that valve links up L1 according to the order of sequence, L2, the L3 size guarantees the time that oil circuit is linked up, L1, L2, the length of L3 then depends primarily on valve a, b, the length of c, and a, b, the length of c can be according to the position in control chamber oil circuit hole on the lining, and the speed that moves in conjunction with valve and the time of cut-out are determined, a1, b1, c1 lead to the location dimension of respectively distinguishing metering valve control chamber oil circuit hole in the valve lining 2, a1, b1, the size of c1 can be evenly distributed according to the length of valve lining.Concrete each size span sees the following form:
Each size span of table valve
| Dimension name | Span (mm) |
| ??a1 | ??6～10 |
| ??b1 | ??24～30 |
| ??c1 | ??42～48 |
| ??a | ??25～30 |
| ??b | ??51～55 |
| ??c | ??72～76 |
| ??L1 | ??13～15 |
| ??L2 | ??5.5～7 |
| ??L3 | ??2～3 |
Working state according to motor, when entering afterburning state, close the shutter spring chamber and lead to the oil circuit of low-pressure cavity, the import high pressure joins spring chamber by the oil nozzle in the middle of the valve, this cavity pressure that raises makes spring chamber pressure and inlet pressure balance, and valve is resisted against the limit on the right-right-hand limit position under the effect of spring force; When the state of emergency occurring, emergency cock is opened, spring chamber and low-pressure cavity are linked up, the spring chamber internal pressure descends, valve overcomes spring force and pushes valve to the limit on the left position under the effect of high pressure oil, valve cuts off the fuel delivery of culvert outside the reinforcing, afterburning intension, afterburning starting successively in moving process.The valve travelling speed is according to the diameter aperture of regulating oil nozzle 3, mates that spring force realizes thereby regulate import fuel oil and spring chamber fuel pressure difference again, and its principle is pressure reduction Driving force and the physical equilibrium between the damping force of draining the oil.
Description of drawings
Fig. 1 is the assembling schematic representation of oil-break valve assembly of the present invention.
Fig. 2 is the critical size schematic representation of oil-break valve assembly.
Among the figure, 1-oil-break valve, 2-oil-break valve lining, 3-oil nozzle, 4-spring, 5-sealing cup.
Embodiment
With reference to figure 2, the actual principle according to the present invention determines to be provided with on the oil-break valve 1 communicating groove of 3 place's diverse locations and length, the fuel oil control point of corresponding respectively afterburning outer culvert, afterburning intension, afterburning starting, set the a1=7 ± 0.1mm of lining 2 simultaneously, b1=25 ± 0.1mm, c1=43 ± 0.1mm; Above size according to lining 2, determine the a=25 ± 0.1mm of valve 1, because the travelling speed of valve is defined as 4.7mm/ second, outside reinforcing, contain the cut-out that begins to be cut to afterburning intension in order to satisfy, with total working time control at 1.5 seconds～3 seconds, begin to cut off from afterburning I district, guarantee in 0.5 second, can try to achieve the b=51 ± 0.1mm of valve 1, c=73 ± 0.1mm to the time of cutting off afterburning I district fully, the total distance that moves according to valve and a of valve 1, b, the size of c, get the L1=13 ± 0.1mm of valve 1, L2=5.5 ± 0.1mm, L3=2, the work elastic force of spring 4 is 240N, the diameter of oil nozzle 3 is 0.3mm, and the interference fit tightness of lining and frame set is 0.03～0.05, and the gap is 0.009～0.014mm between valve and the lining, according to these parameters, the oil valve assembly is resolved in design.Through verification experimental verification, outside reinforcing, to contain and begin to cut oil and cut off to afterburning intension, total working time control began to cut oil at 1.5～3 seconds from afterburning I district, guaranteed that within 0.5 second valve is controlled effect and reached requirement to the time of cutting off afterburning I district fully.
Claims (5)
1, fuel cut-off valve of reheat fuel control unit of turbofan engine, by valve 1, valve lining 2, oil nozzle 3, spring 4 and sealing cup 5 constitute, and it is characterized in that: valve 1 is loaded in the valve lining 2, and oil nozzle 3 is loaded in the through hole of valve 1 centre; Valve lining 2 is contained in the housing, and spring 4 is contained in the spring chamber that forms between the top of valve and the housing, and sealing cup 5 is installed on the valve 1, has several communicating groove on the valve 1, have on the valve lining 2 with valve 1 on the corresponding oil through of each communicating groove.
2, fuel cut-off valve of reheat fuel control unit of turbofan engine according to claim 1, it is characterized in that: the length a=25 from the limit on the left location point to first communicating groove starting point on the valve lining 2～30mm, from the length b=51～55mm of limit on the left location point to the second a communicating groove starting point, from the length c=72～76mm of three communicating groove starting points of limit on the left location point to the.
3, fuel cut-off valve of reheat fuel control unit of turbofan engine according to claim 1, it is characterized in that: the location dimension a1=6 of first oil through～10mm on the valve lining 2, the location dimension b1=24 of second oil through～30mm on the valve lining 2, the location dimension c1=42～48mm of the 3rd oil through on the valve lining 2.
4, fuel cut-off valve of reheat fuel control unit of turbofan engine according to claim 1, it is characterized in that: the length L 1=13 of first communicating groove～15mm on the valve 1, the length L 2=5.5 of second communicating groove～7mm on the valve 1, the length L 3=2～3mm of the 3rd communicating groove on the valve 1.
5, fuel cut-off valve of reheat fuel control unit of turbofan engine according to claim 1 is characterized in that: the travelling speed of valve is regulated by oil nozzle 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810068919A CN101684751A (en) | 2008-09-22 | 2008-09-22 | Fuel cut-off valve of reheat fuel control unit of turbofan engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810068919A CN101684751A (en) | 2008-09-22 | 2008-09-22 | Fuel cut-off valve of reheat fuel control unit of turbofan engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101684751A true CN101684751A (en) | 2010-03-31 |
Family
ID=42048081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810068919A Pending CN101684751A (en) | 2008-09-22 | 2008-09-22 | Fuel cut-off valve of reheat fuel control unit of turbofan engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101684751A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937528A (en) * | 2012-10-31 | 2013-02-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for adjusting supercharging conversion rotation speed of aero engine |
| CN103699114A (en) * | 2013-12-13 | 2014-04-02 | 中国燃气涡轮研究院 | Controller and control method for debugging tests of aviation fuel regulating device |
| CN105370413A (en) * | 2014-08-25 | 2016-03-02 | 中航商用航空发动机有限责任公司 | Aircraft engine fuel oil metering system and control method thereof |
| CN106870164A (en) * | 2017-03-29 | 2017-06-20 | 黑龙江圣邦投资咨询有限公司 | A kind of aero-engine fuel regulator |
| CN107023401A (en) * | 2017-05-28 | 2017-08-08 | 西安成立航空制造有限公司 | A kind of aero-engine fuel nozzle pre-combustion grade auxiliary oil circuit valve and its application method |
| CN108061310A (en) * | 2017-11-28 | 2018-05-22 | 中国航发沈阳发动机研究所 | A kind of rotational flow atomization device and with its aero-engine main chamber |
| CN109296480A (en) * | 2018-11-21 | 2019-02-01 | 中国航发西安动力控制科技有限公司 | A kind of anti-pollution valve assembly |
| CN109653878A (en) * | 2017-10-11 | 2019-04-19 | 中国航发西安动力控制科技有限公司 | A kind of split type metering valve |
| CN111780162A (en) * | 2020-07-08 | 2020-10-16 | 成都航利航空科技有限责任公司 | Binary channels fuel nozzle of adjustable valve |
| CN111852661A (en) * | 2020-05-22 | 2020-10-30 | 中国航发贵州红林航空动力控制科技有限公司 | High-pressure large-flow valve assembly |
| CN112413645A (en) * | 2020-11-19 | 2021-02-26 | 中国航发沈阳发动机研究所 | Method and system for boosting ignition oil supply of aircraft engine |
| CN113464286A (en) * | 2021-05-10 | 2021-10-01 | 中国航发贵州红林航空动力控制科技有限公司 | Hydraulic retarder connecting rod switching mechanism suitable for aircraft engine |
| CN118031251A (en) * | 2024-03-19 | 2024-05-14 | 无锡明阳氢燃动力科技有限公司 | Combustion chamber of hydrogen fuel gas turbine |
-
2008
- 2008-09-22 CN CN200810068919A patent/CN101684751A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937528B (en) * | 2012-10-31 | 2014-12-24 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for adjusting supercharging conversion rotation speed of aero engine |
| CN102937528A (en) * | 2012-10-31 | 2013-02-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for adjusting supercharging conversion rotation speed of aero engine |
| CN103699114A (en) * | 2013-12-13 | 2014-04-02 | 中国燃气涡轮研究院 | Controller and control method for debugging tests of aviation fuel regulating device |
| CN105370413A (en) * | 2014-08-25 | 2016-03-02 | 中航商用航空发动机有限责任公司 | Aircraft engine fuel oil metering system and control method thereof |
| CN105370413B (en) * | 2014-08-25 | 2017-10-10 | 中国航发商用航空发动机有限责任公司 | Aero-engine fuel metering system and its control method |
| CN106870164A (en) * | 2017-03-29 | 2017-06-20 | 黑龙江圣邦投资咨询有限公司 | A kind of aero-engine fuel regulator |
| CN107023401A (en) * | 2017-05-28 | 2017-08-08 | 西安成立航空制造有限公司 | A kind of aero-engine fuel nozzle pre-combustion grade auxiliary oil circuit valve and its application method |
| CN109653878B (en) * | 2017-10-11 | 2021-07-16 | 中国航发西安动力控制科技有限公司 | Split type metering valve |
| CN109653878A (en) * | 2017-10-11 | 2019-04-19 | 中国航发西安动力控制科技有限公司 | A kind of split type metering valve |
| CN108061310A (en) * | 2017-11-28 | 2018-05-22 | 中国航发沈阳发动机研究所 | A kind of rotational flow atomization device and with its aero-engine main chamber |
| CN109296480A (en) * | 2018-11-21 | 2019-02-01 | 中国航发西安动力控制科技有限公司 | A kind of anti-pollution valve assembly |
| CN111852661A (en) * | 2020-05-22 | 2020-10-30 | 中国航发贵州红林航空动力控制科技有限公司 | High-pressure large-flow valve assembly |
| CN111852661B (en) * | 2020-05-22 | 2022-08-05 | 中国航发贵州红林航空动力控制科技有限公司 | High-pressure large-flow valve assembly |
| CN111780162A (en) * | 2020-07-08 | 2020-10-16 | 成都航利航空科技有限责任公司 | Binary channels fuel nozzle of adjustable valve |
| CN112413645A (en) * | 2020-11-19 | 2021-02-26 | 中国航发沈阳发动机研究所 | Method and system for boosting ignition oil supply of aircraft engine |
| CN112413645B (en) * | 2020-11-19 | 2022-06-07 | 中国航发沈阳发动机研究所 | Method and system for boosting ignition oil supply of aircraft engine |
| CN113464286A (en) * | 2021-05-10 | 2021-10-01 | 中国航发贵州红林航空动力控制科技有限公司 | Hydraulic retarder connecting rod switching mechanism suitable for aircraft engine |
| CN118031251A (en) * | 2024-03-19 | 2024-05-14 | 无锡明阳氢燃动力科技有限公司 | Combustion chamber of hydrogen fuel gas turbine |
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Open date: 20100331 |