CN208887930U - A kind of heat screen detecting success rate for improving ultraviolet flame detector - Google Patents
A kind of heat screen detecting success rate for improving ultraviolet flame detector Download PDFInfo
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- CN208887930U CN208887930U CN201821601437.0U CN201821601437U CN208887930U CN 208887930 U CN208887930 U CN 208887930U CN 201821601437 U CN201821601437 U CN 201821601437U CN 208887930 U CN208887930 U CN 208887930U
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- heat screen
- convex lens
- bayonet slot
- flame detector
- success rate
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Abstract
The application belongs to engine chamber design field, in particular to a kind of heat screen that success rate is detected for improving ultraviolet flame detector, in existing technology, for improving the heat screen of ultraviolet flame detector detection success rate further include: convex lens bayonet slot ring, annular groove along circumferential direction is offered on its inner ring surface, convex lens bayonet slot ring is fixedly attached on vibrationproof heat screen, and coaxial with flame detecting hole；High temperature resistant convex lens sheet is arranged in the annular groove of convex lens bayonet slot ring.The thermal current of cooling air and inside on the outside of heat screen is physically isolated, avoids that thermal current reverse irrigation occurs, causes after-burner and rear component ablation；Glazed area is increased, ultraviolet fire is improved and visits device to the detection accuracy of faint flame.
Description
Technical field
The application belongs to engine chamber design field, in particular to a kind of for improving ultraviolet flame detector
Detect the heat screen of success rate.
Background technique
Flame detector is all arranged in aeroengine thrust augmentation combustion chamber, and the feedback result of flame detector is not only pilot
Judge the important evidence whether engine successfully goes booster, and directly participates in the complete machine control of engine, therefore fire visits device
The accuracy of judgement has a very important significance.It is that the fire being widely used at this stage visits one of device type, fire that ultraviolet fire, which visits device,
It visits device to protrude into from outer wall casing, optical signal is acquired by the flame detecting hole on vibrationproof heat screen, further according to the intensity of optical signal
It is translated into electric signal, and then exports result, participate in control.
In actual use, often will appear reinforcing to connect successfully, but fire visits the case where failure is connected in device erroneous judgement.Pass through
Increase the flame detecting hole on vibrationproof heat screen, can effectively improve the success rate that fire visits device judgement, but on vibrationproof heat screen
Excessive hole is opened, will have a direct impact on the normal work of the angular heat screen cooling system, or even there are the risk that thermal current flows backward,
Cause the ablation of rear component.
Thus, it is desirable to have a kind of technical solution overcomes or at least mitigates at least one drawbacks described above of the prior art.
Utility model content
There is provided a kind of for the purpose of the application for improving the heat screen of ultraviolet flame detector detection success rate, with solution
Certainly often occur reinforcing connects successfully, but fire visit device erroneous judgement connect failure the case where and for effectively improve fire spy device judge at
Power, increase vibrationproof heat screen on flame detecting hole and the shadows such as cooling or ablation to after-burner and rear component
It rings.
The technical solution of the application is:
It is a kind of for improving the heat screen of ultraviolet flame detector detection success rate, including outer wall casing and extend radially through
Ultraviolet flame detector on the outer wall casing is set；
Vibrationproof heat screen is co-axially located in the outer wall casing, between the vibrationproof heat screen and the outer wall casing
It is formed with the cavity of circulation cooling air, in the vibrationproof heat screen radial direction, the coaxial position with the ultraviolet flame detector
It sets and offers flame detecting hole；
The heat screen that success rate is detected for improving ultraviolet flame detector further include:
Convex lens bayonet slot ring, offers annular groove along circumferential direction on its inner ring surface, and the convex lens bayonet slot ring is solid
Surely it is connected on the vibrationproof heat screen, and coaxial with the flame detecting hole；
High temperature resistant convex lens sheet is arranged in the annular groove of the convex lens bayonet slot ring.
Optionally, the convex lens bayonet slot ring is welded on the vibrationproof heat screen.
Optionally, the convex lens bayonet slot ring is made of refractory metal material.
Optionally, the convex lens bayonet slot ring is composed of the semicircular ring of two same sizes.
Optionally, there are gaps between the high temperature resistant convex lens sheet and the annular groove of the convex lens bayonet slot ring.
At least there are following advantageous effects in application:
The heat screen for improving ultraviolet flame detector detection success rate of the application is by the cooling air on the outside of heat screen
It is physically isolated with the thermal current of inside, avoids that thermal current reverse irrigation occurs, cause after-burner and rear component ablation；
Glazed area is increased, ultraviolet fire is improved and visits device to the detection accuracy of faint flame.
Detailed description of the invention
Fig. 1 is ultraviolet flame exploration hole and vibrationproof heat screen partial sectional view in the prior art；
Fig. 2 is ultraviolet flame exploration hole and vibrationproof heat screen partial sectional view in the application；
Fig. 3 is the partial sectional view of the application convexity lens bayonet slot ring.
Wherein:
1- ultraviolet flame detector, 2- outer wall casing, 3- vibrationproof heat screen, 4- flame detecting hole, 5- convex lens bayonet slot ring,
6- high temperature resistant convex lens sheet.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application implementation clearer, below in conjunction in the embodiment of the present application
Attached drawing, technical solutions in the embodiments of the present application is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the application
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
In explanation the application, and it should not be understood as the limitation to the application.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall in the protection scope of this application.Under
Face is described in detail embodiments herein in conjunction with attached drawing.
In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is merely for convenience of description the application and simplifies description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as protecting the application
The limitation of range.
The application is described in further details below with reference to Fig. 1 to Fig. 3.
A kind of heat screen detecting success rate for improving ultraviolet flame detector, including outer wall casing 2 and radial direction are passed through
Wear the ultraviolet flame detector 1 set on outer wall casing 2；
Vibrationproof heat screen 3 is co-axially located in outer wall casing 2, and stream is formed between vibrationproof heat screen 3 and outer wall casing 2
The cavity of logical cooling air, in 3 radial direction of vibrationproof heat screen, coaxial position offers flame spy with ultraviolet flame detector 1
Gaging hole 4 (see Fig. 3)；
As shown in Figure 1, in the present embodiment, the application further include:
Convex lens bayonet slot ring 5 (such as Fig. 2), but metal material resistant to high temperature is made, and offers circumferentially on its inner ring surface
The annular groove in direction, convex lens bayonet slot ring 5 are fixedly attached on vibrationproof heat screen 3, and coaxial with flame detecting hole 4 or be overlapped one
Part；
High temperature resistant convex lens sheet 6 is arranged in the annular groove of convex lens bayonet slot ring 5.
In the present embodiment, first high temperature resistant convex lens sheet 6 is installed in the annular groove of convex lens bayonet slot ring 5, then will be convex
Lens bayonet slot ring 5 is welded on vibrationproof heat screen 3, it is to be appreciated that: convex lens bayonet slot ring 5 is by two sizes identical half
Annulus, which combines, to be formed, and is conducive to install high temperature resistant convex lens sheet 6, since high temperature resistant convex lens sheet 6 is in the ring of a high temperature
Under border, and there is biggish difference variation of floating, so between the annular groove of high temperature resistant convex lens sheet 6 and convex lens bayonet slot ring 5 is
Gap cooperation avoids because expanding with heat and contract with cold influence caused by leading to object body shape changes.
In the prior art, it is detected in order to more accurately change to flame, it will usually increase on vibrationproof heat screen 3
Flame detecting hole 4, but when heat screen channel cooling gas pressure be greater than inside thermal current pressure when, cooling air can lead to
The inside that flame exploration hole 4 enters vibrationproof heat screen 3 is crossed, directly reduces the flow of cooling air, shadow is caused to cooling effect
It rings, when heat screen channel cooling gas pressure is less than the pressure of the thermal current of inside, then hot gas reverse irrigation or even hot gas can occur
Stream can sweep along the fuel oil being atomized to enter heat screen cooling duct, cause ablation；
In the present embodiment, added high temperature resistant convex lens sheet 6, can effectively by the gas inside and outside vibrationproof heat screen 3 every
It leaves, ensure that equipment side safety, while the light optically focused of inside flame is converged into ultraviolet fire using the principle of convex lens
On flame detector 1, ultraviolet flame detector 1 is improved to the detection accuracy of faint flame.
It is to be understood that the high temperature resistant convex lens sheet 6 added, can effectively by the gas inside and outside vibrationproof heat screen 3 every
It leaves, ensure that equipment side safety, to make ultraviolet flame detector 1 measure bigger visual angle, so can be appropriate to flame
Exploration hole 4 is expanded.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Within the technical scope of the present application, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
Cover within the scope of protection of this application.Therefore, the protection scope of the application should be with the scope of protection of the claims
It is quasi-.
Claims (5)
1. a kind of heat screen for detecting success rate for improving ultraviolet flame detector, including outer wall casing (2) and radial direction are passed through
Wear the ultraviolet flame detector (1) set on the outer wall casing (2)；
Vibrationproof heat screen (3) is co-axially located in the outer wall casing (2), the vibrationproof heat screen (3) and the outer wall casing
(2) it is formed with the cavity of circulation cooling air between, in vibrationproof heat screen (3) radial direction, is detected with the ultraviolet flame
The coaxial position of device (1) offers flame detecting hole (4)；
It is characterized in that, described for improving ultraviolet flame detector detection success rate further include:
Convex lens bayonet slot ring (5) offers annular groove along circumferential direction, the convex lens bayonet slot ring (5) on its inner ring surface
It is fixedly attached on the vibrationproof heat screen (3), and coaxial with the flame detecting hole (4)；
High temperature resistant convex lens sheet (6) is arranged in the annular groove of the convex lens bayonet slot ring (5).
2. according to claim 1 for improving the heat screen of ultraviolet flame detector detection success rate, which is characterized in that
The convex lens bayonet slot ring (5) is welded on the vibrationproof heat screen (3).
3. according to claim 1 for improving the heat screen of ultraviolet flame detector detection success rate, which is characterized in that
The convex lens bayonet slot ring (5) is made of refractory metal material.
4. according to claim 1 for improving the heat screen of ultraviolet flame detector detection success rate, which is characterized in that
The convex lens bayonet slot ring (5) is composed of the semicircular ring of two same sizes.
5. according to claim 1 for improving the heat screen of ultraviolet flame detector detection success rate, which is characterized in that
There are gaps between the high temperature resistant convex lens sheet (6) and the annular groove of the convex lens bayonet slot ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601437.0U CN208887930U (en) | 2018-09-29 | 2018-09-29 | A kind of heat screen detecting success rate for improving ultraviolet flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601437.0U CN208887930U (en) | 2018-09-29 | 2018-09-29 | A kind of heat screen detecting success rate for improving ultraviolet flame detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208887930U true CN208887930U (en) | 2019-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821601437.0U Active CN208887930U (en) | 2018-09-29 | 2018-09-29 | A kind of heat screen detecting success rate for improving ultraviolet flame detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923398A (en) * | 2021-03-04 | 2021-06-08 | 西北工业大学 | Afterburning chamber antivibration heat screen |
| CN114136639A (en) * | 2021-10-20 | 2022-03-04 | 中国航发四川燃气涡轮研究院 | Flame tube pressure drop measuring device |
-
2018
- 2018-09-29 CN CN201821601437.0U patent/CN208887930U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923398A (en) * | 2021-03-04 | 2021-06-08 | 西北工业大学 | Afterburning chamber antivibration heat screen |
| CN112923398B (en) * | 2021-03-04 | 2022-07-22 | 西北工业大学 | Afterburning chamber antivibration heat screen |
| CN114136639A (en) * | 2021-10-20 | 2022-03-04 | 中国航发四川燃气涡轮研究院 | Flame tube pressure drop measuring device |
| CN114136639B (en) * | 2021-10-20 | 2023-10-03 | 中国航发四川燃气涡轮研究院 | Flame tube pressure drop measuring device |
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