CN1034039A - The control mechanism of injector diaphragms - Google Patents
The control mechanism of injector diaphragms Download PDFInfo
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- CN1034039A CN1034039A CN 87101276 CN87101276A CN1034039A CN 1034039 A CN1034039 A CN 1034039A CN 87101276 CN87101276 CN 87101276 CN 87101276 A CN87101276 A CN 87101276A CN 1034039 A CN1034039 A CN 1034039A
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- Prior art keywords
- firing chamber
- ring part
- chamber according
- ring
- dividing plate
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Abstract
The invention discloses a kind of control mechanism that is used for the dividing plate of injection apparatus on the turbogenerator, wherein used a streamline ring part to make the dividing plate of each air-fuel injection apparatus be synchronized with the movement.Ring part is connected with each dividing plate, the rotation of an independent control piece control ring part.Minimum is reduced in the disturbance that will walk around the air stream of control system like this.
Description
The strict antipollution requirement of international environmental protection standard makes the airplane engine Designer seek to reduce the approach of turbojet engine exhaust emission pollution.A kind of way is the distribution that utilizes movable hinged joint or dividing plate to come the air stream of continuous control formation fuel-air mixture, changes the inlet-duct area of injection apparatus suction port as the function of engine operating parameter.
F.P. 2,572,463 disclose the injection apparatus at a kind of variable leaf angle.In this device, dividing plate is supported on the outer cyclone separator of each injection apparatus, and by a rod member location by fork controls, this shift fork is by an axle supporting that is installed in rotation on the combustor outer casing.Dividing plate to each injection apparatus all has an independent control system of passing shell, and a synchronizing ring that is positioned at the combustor outer casing outside is synchronized with the movement all injection apparatus.
Although this device has reduced the exhaust of motor effectively, a large amount of connecting rod in air flow channel, shift fork and other rod member (their quantity equals the quantity of injection apparatus) have hindered flowing of the cooled gas of crossing outer wall of combustion chamber.The a large amount of control parts that pass engine housing all need to seal to prevent excessive gas leakage, so just make device complicated excessively.
In other device, be the synchronized movement that makes dividing plate by a ring between combustor outer casing and outer wall of combustion chamber, this ring is connected in the controlling rod of dividing plate.This design has also hindered the runner of outer wall cooled gas, and is unfavorable for producing uniform cooling air film.
F.P. 2,491,140 disclose a kind of control system that is installed in the outer shroud on the roller bearing that has, and this bearing is positioned on the garden cylindrical support face of a firing chamber.Though this system has simple advantage, it requires the dividing plate driveshaft to pass the cylindrical bearing surface and the roller bearing of firing chamber, thereby is difficult to this system of actual enforcement.Owing to exist the toroidal cavity that forms by the cylindrical bearing surface that supports driving ring, be unfavorable for that also cooling air is directed to the outer cyclone separator of outer wall of combustion chamber and Guide spray device, this cavity forms a blind hole around injection apparatus, causes disturbance out of control and hinders the air guide cyclone separator.
The invention relates to the turbine combustion chamber that has variable leaf angle injection apparatus improvement control gear, this control gear has saved the driving ring in the runner between combustor outer casing and outer wall.The present invention is not positioned at the outer control ring of shell yet.
System according to the present invention comprises a streamline ring part with arc-shaped sections, and it is decomposed into first component and second component with air stream, and first component enters the air-fuel injection apparatus, and second component is crossed outer wall of combustion chamber and formed a peripheral film.This system has controlled dividing plate effectively and can not hamper the formation that air film is cooled off in resistance.
System applies according to the present invention is on the turbo machine with an annular combustion chamber, and described annular combustion chamber comprises one group around the front end of firing chamber or the air-fuel injection apparatus of upstream extremity annular array.Each air-fuel injection apparatus all has an axle that is roughly parallel to vertical symmetry axis extension of firing chamber.Each air-fuel injection apparatus comprises that an outer cyclone separator forms fuel air mixture so that first component of air is introduced injection apparatus.Outer cyclone separator comprises one group of blade that limits some passages, and movably dividing plate can make the size of access portal change, and dividing plate is installed in rotation on the injection apparatus.
The streamline ring part is installed in rotation on the upstream portion or the front portion of firing chamber, thereby it can rotate around vertical symmetry axis of firing chamber.Between the dividing plate of ring part and each injection apparatus, connection set is installed, so the rotation of ring part just makes each dividing plate synchronously rotate basically.By means of a control gear ring part is rotated, this control gear comprises that an independent axle is connected the shift fork of this and ring part with one.
Between ring part and firing chamber, bearing means is installed, so that the friction that relatively rotates generation of these parts is reduced to minimum.Bearing means can be the sliding bearing of being made by heat-resisting rub resistance material, also can be ball bearing structure.
Fig. 1 is the vertical sectional view that has according to the annular combustion chamber of the turbojet engine of control system of the present invention.
Fig. 2 is the local amplification profile diagram of part A shown in Figure 1, shows according to control system of the present invention.
Fig. 3 is a schematic partial sectional view of the present invention, shows the part that is separated from each other in assembly process.
Fig. 4 is a partial front elevation view, shows dividing plate and control system that IV-the IV line is got along Fig. 2.
Fig. 5 is a schematic partial sectional view, shows according to the low car in this ⒚ saddle cloth order Dao Portugal and herds flat stone with ropes attached at the sides emperor stool ├
Fig. 1 shows the annular combustion chamber of a turbojet engine, and it is made up of inwall 1 and outer wall 2, and inwall 1 and outer wall 2 all are made of several rings.The front end of firing chamber or upstream extremity 3 comprise one group of air-fuel injection apparatus 4, they in the annular array mode around upstream extremity 3 regular distribution.With reference to Fig. 2, injection apparatus 4 is described in more detail.
A ring part 5 is installed on the firing chamber, and be positioned at upstream extremity 3 near, this ring part 5 has one approximately near the arc transverse section of quadrant.Ring part 5 is to be used for the air from turbojet engine gas compressor (unshowned turbojet engine gas compressor is positioned at the left side from Fig. 1) is decomposed into one first component F
1With a second component F
2, first component F
1Be directed to the air-fuel injection apparatus, second component F
2Be directed to the annular space between outer wall of combustion chamber 2 and the combustor outer casing 6.This part fluid is cooling combustion locular wall 2 from the outside, and by mix aperture 7 and dilution holes 8 also enter the firing chamber in known manner with fuel mix by injection apparatus atomizing.Known as this field, thereby this strand air has also reduced the temperature of the waste gas of firing chamber discharge the temperature effect on the high-pressure multi-stage turbine (not shown) that acts on the firing chamber downstream is reduced to minimum.
As shown in Figure 2, each injection apparatus 4 all comprises a center fuel nozzle 9, this nozzle 9 have one be roughly parallel to shown in vertical symmetry axis 33(Fig. 1 of firing chamber) longitudinal axis 32 that extends.Each injection apparatus also comprises an interior cyclone separator 10 and an outer cyclone separator 11, and they each all cooperates with nozzle 9 sends one deck atomized fuel into middle conical shell 12.A dividing plate 13 can open and close outer cyclone separator 11 continuously, thereby makes the working state coupling of air stream and motor reduce to minimum with the pollution waste gas.This is known in this field for this injection apparatus, and its object lesson is shown on the above-mentioned F.P. 2,572,463.
Ring part 5 is rotatably installed in the upstream portion of outer wall 2 by a ball bearing structure, and this ball bearing structure comprises a cylindrical retainer that one group of ball 15 is held in place.Be resisted against on the step 16 of ring part 5 thereby the downstream part 14a of this retainer is outwardly-bent, make that the assembling of device is easier, this will discuss in more detail below.
This group ball 15 rolls with the first diconical circular raceway 17 of processing on ring part 5 inner surface portion and contacts, and roll with the second biconial raceway that the frustum shaped upstream end 2a of outer wall 2 and frustum shaped supporting portion 18a are limited and to contact, supporting portion 18a is limited by 18 on the ring that is positioned at outer wall 2.
Make ring part 5 rotations by a control system, this control system comprises one, and to pass combustor outer casing 6 vertical with the firing chamber symmetry axis, and be rotatably installed in running shaft 20 on it, 23, one shift forks 22 that the inner end and the connecting rod 23 of axle 20 are coupled together of connecting rod that roughly extend radially outwardly from ring part 5.Make axle 20 rotations with being positioned at any any means known outside the shell 6, as rack and pinion, hydraulic jack and connecting rod, or by the known electro-hydraulic device of air breathing engine controller control.
Ring part 5 connects double-screw bolt by means of one and is connected with each dividing plate 13, connect double-screw bolt and comprise a helical thread portion 21 and an eccentric end 21a who installs, helical thread portion 21 is threaded with ring part 5 by screw 34, and the shift fork 13a of eccentric end 21a and dividing plate 13 engagement.Eccentric end 21a can make each connection double-screw bolt carry out angular adjustment individually, thereby each dividing plate is adjusted to synchronously opening and closing.Suitably located in case connect double-screw bolt, locking nut 25 is just twisted the inboard of withstanding ring part 5 thereon and is connected double-screw bolt to pin.
Assembling is at first with each injection apparatus 4 according to the step of control system of the present invention, and their dividing plate 13, be installed in a known way the firing chamber foremost or upstream extremity, then interior ring 18 is placed on the position below the outer wall of combustion chamber shown in Figure 32, thereby makes single hole 18b be positioned at the upstream of the end of outer wall 2.Then retainer 14 is placed on its position, and then places ring part 5 again.By single hole 18b ball 15 is sent into one at a time and is located in the hole of retainer 14 then.In ring 18 can rotate freely so that hole 18b is alignd with each positioning hole on the retainer 14.
After all balls 15 were packed retainer 14 into, interior ring 18 moved to position shown in Figure 2 downstream, thereby single hole 18b is covered by outer wall 2.Through hole 2b and 18c by alignment inserts bolt 19 so that part is fixed together then.Ring part 5 can limit an independent notch 24, so that the installation of bolt 19.An independent notch is enough, and this is because ring part 5 can be with respect to outer wall 2 rotations during installation.
In case interior ring 18 enters its position, just form the second interior biconial raceway of ball 15 by frustum shaped surface 2a and 18a.Ring part 5 and interior ring 18 are pushed away to chamber front end simultaneously, thereby ball 15 is positioned between the interior raceway that outer raceway 17 and bearing surface 2a, 18a limited.
Then double-screw bolt 21 is screwed in the hole 34, eccentric end 21a is put among the shift fork 13a of each dividing plate 13.Move all dividing plates and make dividing plate adjust to fully open position (or closed position) fully, tighten locking nut 25 then so that lock stud 21, thereby suitably make the dividing plate of all injection apparatus synchronous.At last, the shift fork 22 of control system meshes and is fixed on the axle 20 with connecting rod 23.
In another embodiment shown in Figure 5, replace ball bearing structure with a ring 30 of making by the material of having strong resistance to heat and hard wearing.The cross section of ring 30 can roughly be the rectangle that chamfering is arranged, so that mesh with interior and outer bearing raceway.Enter the 18b of hole except having cancelled ball from interior ring 18, this embodiment's remaining parts is the same with previous embodiment.
In aforementioned two embodiments, can have the seal arrangement of a bearing member, be shown in Fig. 5 as a flange 31(who extends radially inwardly from ring part 5).This flange can prevent that impurity from entering bearing means.
According to the advantage that control system of the present invention had is the part that minimum number is only arranged in air flow channel, promptly unique shift fork 22 and unique connecting rod 23.Rotate ring part 5 all dividing plates will be rotated around separately axle, meanwhile ring part will guide air and make air stream can not be inserted in odd parts obstruction in the runner.
In the embodiment who uses rolling bearing, for carry out proper functioning in the whole true temperature scope of firing chamber, this structure is very simple, and this firing chamber has the gap that suitably calculates at ring part between ball and the interior ring.This gap is compensated by axial force and the inside and outside raceway of biconial that air puts on the ring part.So at work, ring part is self centering and can absorb simultaneously expansion accordingly and not hinder its rotation with respect to the firing chamber.
In view of the power on the ball bearing of putting on is medium (to the ring part assembly for being bordering on 300daN), material therefor still can be the same with the material on being used for the traditional combustion chamber (the superalloy HASTELLOYX that produces as commercialization), also can carry out surface hardening to tapered raceway simultaneously and handle.
The injection apparatus that control system according to the present invention can be applicable to have the injection apparatus of fan-shaped conical shell or has wide formula conical shell, unique application of principle are the cyclone separator dividing plates that is used to control by the variable leaf angle injection apparatus of annular array on the firing chamber.
Top description only is for illustrative purposes, should not be considered to limit by any way the present invention, and additional claims define the scope of the invention.
Claims (17)
1, a kind of annular combustion chamber that is used for turbojet engine with a vertical symmetry axis, the air-fuel injection apparatus that one group of annular array is arranged at the front end of annular combustion chamber, their axle is parallel with described longitudinal shaft, each air-fuel injection apparatus has an outer cyclone separator, this outer cyclone separator defines an opening the first air component is introduced injection apparatus to form flammable air-fuel mixture, also have a rotating dividing plate with control cyclone separator opening, it is characterized in that comprising:
(a) one is generally fusiform ring part, and it has an arc transverse section, thereby air stream is decomposed into first component and second component, and first component flows into the air-fuel injection apparatus, and second component is crossed the outer wall of firing chamber,
(b) ring part is installed in rotation on device on the firing chamber, thereby makes that ring part can be around vertical symmetry axis rotation,
(c) connect the drive unit handled of ring part, so as around vertical symmetry axis along the two in any one direction move ring part and
(d) connection set of connection ring part and each rotatable dividing plate, thus the rotation of ring part makes dividing plate roughly synchronously rotate.
2, annular combustion chamber according to claim 1, wherein drive unit comprises:
(a) independent connecting rod that roughly extends radially outwardly from ring part,
(b) axle that can rotate around the axle center of self and
(c) shift fork that connects described axle and connecting rod, a rotation that makes spool causes the rotation of ring part.
3, firing chamber according to claim 2, the vertical axis of wherein said axle is approximately perpendicular to vertical symmetry axis of firing chamber.
4, firing chamber according to claim 3, wherein connection set comprises that connects a double-screw bolt, each connects double-screw bolt and extends between ring part and each rotating dividing plate.
5, firing chamber according to claim 4, wherein each connects double-screw bolt and comprises that a helical thread portion that is threaded with ring part and one are eccentric end with respect to helical thread portion, and this end and relevant dividing plate mesh.
6, firing chamber according to claim 5 also comprises the bearing means that places between firing chamber and the ring part.
7, firing chamber according to claim 6, also comprise an interior ring that is installed on the outer wall of combustion chamber, biconial bearing race in outer wall and interior ring define one second limits one first outer biconial bearing race by ring part, and bearing means just places between first and second raceways.
8, firing chamber according to claim 7, wherein bearing means comprises a ring of being made by the material of having strong resistance to heat and hard wearing.
9, firing chamber according to claim 7, wherein bearing means comprises one group of ball that rolls and contact with first and second raceways.
10, firing chamber according to claim 9, wherein in ring define a hole, ball is inserted between first and second raceways being convenient to.
11, firing chamber according to claim 1, wherein connection set comprises that connects a double-screw bolt, each connects double-screw bolt and extends between ring part and each rotating dividing plate.
12, firing chamber according to claim 11 wherein connects double-screw bolt and comprises that a helical thread portion that is threaded with ring part and one are eccentric end with respect to helical thread portion, and mesh with relevant dividing plate this end.
13, firing chamber according to claim 1 also comprises the bearing means that places between ring part and the firing chamber.
14, firing chamber according to claim 13, also comprise an interior ring that is installed on the outer wall of combustion chamber, biconial bearing race in outer wall and interior ring define one second, define one first outer biconial bearing race by ring part, bearing means just places between first and second raceways.
15, firing chamber according to claim 14, wherein bearing means comprises a ring of being made by the material of having strong resistance to heat and hard wearing.
16, firing chamber according to claim 14, wherein bearing means comprises one group of ball that rolls and contact with first and second raceways.
17, firing chamber according to claim 16, wherein in ring define a hole, ball is inserted between first and second raceways being convenient to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101276 CN1011152B (en) | 1987-12-25 | 1987-12-25 | Control mechanism for injector diaphragms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101276 CN1011152B (en) | 1987-12-25 | 1987-12-25 | Control mechanism for injector diaphragms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034039A true CN1034039A (en) | 1989-07-19 |
| CN1011152B CN1011152B (en) | 1991-01-09 |
Family
ID=4813288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101276 Expired CN1011152B (en) | 1987-12-25 | 1987-12-25 | Control mechanism for injector diaphragms |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011152B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959334A (en) * | 2010-06-28 | 2013-03-06 | 西门子公司 | A combustion apparatus |
| CN105121960A (en) * | 2013-03-19 | 2015-12-02 | 斯奈克玛 | Injection system for a combustion chamber of a turbine engine, comprising an annular wall having a convergent inner cross-section |
-
1987
- 1987-12-25 CN CN 87101276 patent/CN1011152B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959334A (en) * | 2010-06-28 | 2013-03-06 | 西门子公司 | A combustion apparatus |
| CN105121960A (en) * | 2013-03-19 | 2015-12-02 | 斯奈克玛 | Injection system for a combustion chamber of a turbine engine, comprising an annular wall having a convergent inner cross-section |
| CN105121960B (en) * | 2013-03-19 | 2018-01-05 | 斯奈克玛 | The spraying system for including the annular wall with convergence inner section for the combustion chamber of turbogenerator |
| US10036552B2 (en) | 2013-03-19 | 2018-07-31 | Snecma | Injection system for a combustion chamber of a turbine engine, comprising an annular wall having a convergent inner cross-section |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1011152B (en) | 1991-01-09 |
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