CN109098791A - Applied to the sliding strip type calotte ice prevention structure of turbofan aero-engine, method - Google Patents
Applied to the sliding strip type calotte ice prevention structure of turbofan aero-engine, method Download PDFInfo
- Publication number
- CN109098791A CN109098791A CN201710470568.3A CN201710470568A CN109098791A CN 109098791 A CN109098791 A CN 109098791A CN 201710470568 A CN201710470568 A CN 201710470568A CN 109098791 A CN109098791 A CN 109098791A
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- CN
- China
- Prior art keywords
- calotte
- draw runner
- prevention structure
- strip type
- elastic
- Prior art date
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/02—De-icing means for engines having icing phenomena
Abstract
The purpose of the present invention is to provide a kind of sliding strip type calotte ice prevention structure and method applied to turbofan aero-engine, structure is simple.Application according to the present invention is in the sliding strip type calotte ice prevention structure of turbofan aero-engine, and including the elastic draw runner extended on calotte along the surface of calotte, one end of the elasticity draw runner is slidably and the other end is fixed.
Description
Technical field
The present invention relates to the ice prevention structures of aerial engine fan calotte, method.
Background technique
When working under higher in the humidity and atmospheric environment close to freezing point of turbofan aero-engine, fan calotte easily occurs
It freezes.After fan calotte freezes, understands the diffusion blocking engine air flow with ice field and form whirlpool.Whirlpool will lead to hair
Motivation fluctuation of service, in turn results in stall and surge.Simultaneously as calotte icing can diffuse to blade, blade icing can be made
At compressor imbalance, vibration is generated；If calotte freezes, the ice cube generated falls off, and can hit the components such as fan propeller, causes outer
Object inhalation injury.Therefore, effective fan calotte is anti-icing for guaranteeing that the normal of fanjet, reliably working have important meaning
Justice.
Currently, the calotte ice prevention structure used in turbofan aero-engine includes:
A) calotte heats ice prevention structure:
Calotte heats ice prevention structure and realizes that calotte is anti-icing using warm air heating.Current of warm air is drawn from compressor, along low
Last item enters calotte cavity, is then excluded by being located at the hole of calotte rear front end.The ice prevention structure, structure is complicated, to cap
The design of cover structure and engine air system has higher requirement, while also will increase the weight of engine.
B) rubber tip cap cover ice prevention structure:
Rubber tip cap cover ice prevention structure realizes anti-icing, principle by the rubber tip being mounted on calotte are as follows: works as cap
When covering tip icing, due to asymmetry caused by freezing, rubber tip vibrates, so that it is broken to freeze, and in centrifugal force
Under the action of fall off, guarantee freeze will not spread backward.This ice prevention structure, structure is relatively easy, but has the following disadvantages: 1.
To avoid falling off for rubber tip, the design requirement of rubber diecer boot is higher, has relatively high technical threshold；2. such as rubber
Diecer boot is damaged in use, it is necessary to the calotte more renewed, it is difficult to repair, cause higher to it in course line grade maintenance
Maintenance cost.
Summary of the invention
The purpose of the present invention is to provide a kind of applied to the sliding strip type calotte ice prevention structure of turbofan aero-engine and side
Method, structure are simple.
Application according to the present invention is in the sliding strip type calotte ice prevention structure of turbofan aero-engine, including along cap on calotte
The elastic draw runner that the surface of cover extends, one end of the elasticity draw runner is slidably and the other end is fixed.
In one embodiment, the both ends difference of the elastic draw runner is detachable.
In one embodiment, the elastic draw runner extends on the surface of calotte along the bus of calotte surface curve.
In one embodiment, the elastic draw runner is installed on mounting bar, and the mounting bar is fixed in the elongated slot of calotte,
One end of the elasticity draw runner is fixed on the mounting bar, and the mounting bar has sliding slot, and the other end connects sliding part, institute
Stating sliding part can slide in the sliding slot.
In one embodiment, the elastic draw runner is removably attached on calotte, in order to replace the elastic draw runner.
In one embodiment, the elastic surface of draw runner and the surface profiles of calotte, so that elastic draw runner is from pneumatic property
A part of calotte is constituted for energy angle.
A kind of calotte anti-icing method applied to turbofan aero-engine, along the surface of calotte, setting elasticity is sliding on calotte
Item causes the centrifugal force acted on elastic draw runner to become larger, elastic draw runner is made to shake when calotte freezes by means of freezing
It is dynamic, so that freezing broken and being thrown out of under the action of the centrifugal force, to effectively prevent calotte icing and the diffusion that freezes.
The beneficial effects of the present invention are:
When calotte freezes, the centrifugal force acted on elastic draw runner is caused to become larger due to freezing, the elasticity at calotte is sliding
Item vibrates, so that freezing broken and being thrown out of under the action of the centrifugal force, expands so that calotte effectively be prevented to freeze and freeze
It dissipates, for sliding strip type calotte ice prevention structure by elastic draw runner come anti-icing, structure is simple, and is conveniently replaceable and safeguards, is effectively reduced
Working service cost.
Detailed description of the invention
The above and other features of the present invention, property and advantage will pass through retouching with reference to the accompanying drawings and examples
It states and becomes readily apparent from, in which:
Fig. 1 is the longitudinal sectional view according to fan of the present invention.
Fig. 2 is the side view that calotte part is corresponded in Fig. 1.
Fig. 3 is the partial enlargement diagram in Fig. 1 at A.
Fig. 4 is the state diagram one of elastic draw runner in Fig. 1.
Fig. 5 is the state diagram two of elastic draw runner in Fig. 1.
Fig. 6 is the state diagram three of elastic draw runner in Fig. 1.
Fig. 7 is the state diagram four of elastic draw runner in Fig. 1.
Specific embodiment
In the following description, with reference to each embodiment, present invention is described.However, those skilled in the art will recognize
Know can in the case where none or multiple specific details or with other replacements and/or addition method, material or component
Implement each embodiment together.In other situations, well known structure, material or operation are not shown or are not described in detail in order to avoid making this
The aspects of each embodiment of invention is obscure.Similarly, for purposes of explanation, specific quantity, material and configuration are elaborated, with
Comprehensive understanding to the embodiment of the present invention is just provided.However, the present invention can be implemented in the case where no specific detail.This
Outside, it should be understood that each embodiment shown in the accompanying drawings is illustrative expression and is not drawn necessarily to scale.
In Fig. 1, elastic draw runner is only schematically shown out, and the position of elastic draw runner, cap are aobvious for ease of description
It is shown as transparent for.
As shown in Figure 1 to Figure 3, application according to the present invention is in the sliding strip type calotte ice prevention structure of turbofan aero-engine,
Including the elastic draw runner 2 extended on calotte 1 along the surface of calotte 1, one end of elastic draw runner 2 is slidably.Calotte 1 is arranged in wind
The entrance side of fan 3.Fig. 3 shows the installation example of elastic draw runner 2, elastic draw runner 2 there are many mounting means on calotte 1,
Fig. 3 is merely exemplary to show a kind of mounting means and not restrictive.As shown in figure 3, one end of elastic draw runner 2 is by fastener 102
Fastening, and the other end connects sliding part 103, fastener 102 is fixedly connected with mounting bar 104, and sliding part 103 is slidably disposed on
In the sliding slot 1040 of mounting bar 104.Mounting bar 104 is fixed in the elongated slot 10 of calotte 1.Mounting bar 104 can be relative to cap
1 independent entity component is covered, the integrally formed construction on calotte 1 is also possible to.In another embodiment, elastic draw runner 2
Fixing end, movable end position shown in the figure can be interchanged.The fixing end of elastic draw runner 2 is removably to connect with movable end
It connects, with conveniently replaced.Elastic draw runner 2 has elasticity, in fan rotation process, in the case where icing, by means of centrifugal force
Effect, elastic draw runner 2 can generate flexible deformation, and therefore vibrate, whereby vibration to prevent from freezing.
As shown in Fig. 2, be distributed more elastic draw runners 2 on calotte 1, elastic draw runner 2 along calotte 1 surface, from calotte 1
One end to the other end, can the bus of curved surface defined by the surface along calotte 1 extend, itself and calotte 1 in other words
Axis in the same plane, in another embodiment, can not also be in the same plane.
The surface profiles of elastic draw runner 2 and calotte 1, so that elastic draw runner 2 constitutes calotte 1 for aeroperformance angle
A part.The surface of elastic draw runner 2 is concordant with calotte 1 as far as possible, so that sliding strip type anti-icing equipment does not influence the pneumatic of calotte as far as possible
Performance.Fig. 4 shows state when not freezing of elastic draw runner 2.Fig. 5 shows state when having icing on elastic draw runner 2, ice
5 increase quality after the elastic icing of draw runner 2.As shown in Figure 6, Figure 7, when calotte 1 freezes, cause to act on bullet due to freezing
Property draw runner 2 on centrifugal force become larger, the elastic draw runner 2 at calotte 1 vibrates, so that it is broken and under the action of the centrifugal force to freeze
It is thrown out of, is spread so that calotte 1 effectively be prevented to freeze and freeze.
Therefore sliding strip type calotte ice prevention structure will freeze broken at the initial stage of icing, elastic draw runner 2 freeze it is broken after by
Rigidity in itself restores to the original state, and guarantees the balance of calotte structure, reduces the adverse effect to calotte aeroperformance.Sliding strip type cap
During cover ice prevention structure ice-breaking, the sliding end (when having sliding part, sliding part is moved together) of elastic draw runner 2 is slightly mobile, with
Guarantee that the dynamic balancing of calotte 1 will not be a greater impact.
When ice prevention structure damage, damaged elastic draw runner 2 or elastic draw runner 2 and mounting bar 104, nothing are only needed to change
Entire calotte need to be removed.
By selecting the elastic draw runner 2 of different-stiffness, it can adjust the sensibility of elasticity 2 pairs of icings of draw runner, adapted to reaching
The purpose of varying environment.
By aforementioned embodiments as can be seen that
1) sliding strip type calotte ice prevention structure is designed using simple structure, is not increased other corollary apparatus, is effectively prevented
Only calotte freezes, and reduces the structure complexity of calotte anti-icing equipment；
2) sliding strip type calotte ice prevention structure is permitted using elastic draw runner instead of the structure of the anti-icing calotte centrum of whole rubber
Perhaps the modular repair and replacement of anti-icing equipment, significantly reduces the maintenance cost of anti-icing equipment；
3) sliding strip type calotte ice prevention structure installs elastic draw runner using the mode that fastener connects, convenient for tearing open for elastic draw runner
Dress and adjustment realize that draw runner anti-icing equipment is suitable for different flight environment of vehicle.
According to aforementioned embodiments it will be appreciated that a kind of calotte anti-icing method applied to turbofan aero-engine,
Elastic draw runner 2 is set along the surface of calotte 1 on calotte 1, when calotte 1 freezes, causes to act on elastic draw runner 2 by means of freezing
On centrifugal force become larger, vibrate elastic draw runner 2 so that freeze broken and be thrown out of under the action of the centrifugal force, from
And it effectively prevents calotte 1 from freezing and freeze and spreads.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this field skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any modification to the above embodiments, equivalent variations
And modification, it each falls within the protection scope that the claims in the present invention are defined.
Claims (9)
1. be applied to turbofan aero-engine sliding strip type calotte ice prevention structure, which is characterized in that including on calotte along calotte
The elastic draw runner that extends of surface, one end of the elasticity draw runner is slidably and the other end is fixed.
2. sliding strip type calotte ice prevention structure as described in claim 1, it is characterised in that the both ends of the elasticity draw runner respectively can
Disassembly.
3. sliding strip type calotte ice prevention structure as described in claim 1, it is characterised in that the elasticity draw runner is on the surface of calotte
On along calotte surface curve bus extend.
4. sliding strip type calotte ice prevention structure as described in claim 1, it is characterised in that the elasticity draw runner is installed on mounting bar
On, the mounting bar is fixed in the elongated slot of calotte, and one end of the elasticity draw runner is fixed on the mounting bar, the installation
Item has sliding slot, and the other end connects sliding part, and the sliding part can slide in the sliding slot.
5. sliding strip type calotte ice prevention structure as claimed in claim 4, it is characterised in that the elasticity draw runner is removably secured
On calotte, in order to replace the elastic draw runner.
6. sliding strip type calotte ice prevention structure as described in claim 1, it is characterised in that the surface of the elasticity draw runner and calotte
Surface profiles so that elastic draw runner constitutes a part of calotte for aeroperformance angle.
7. a kind of calotte anti-icing method applied to turbofan aero-engine, which is characterized in that along the surface of calotte on calotte
Elastic draw runner is set, when calotte freezes, causes the centrifugal force acted on elastic draw runner to become larger by means of freezing, makes elastic cunning
Item vibrates, so that freezing broken and being thrown out of under the action of the centrifugal force, so that calotte effectively be prevented to freeze and tie
Ice diffusion.
8. calotte anti-icing method as claimed in claim 7, it is characterised in that it is removably disposed the elastic draw runner, in order to
Replace the elastic draw runner.
9. calotte anti-icing method as claimed in claim 7, it is characterised in that make elastic draw runner edge on the surface of calotte
The bus of calotte surface curve extends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710470568.3A CN109098791B (en) | 2017-06-20 | 2017-06-20 | Anti-icing structure and method for slide bar type cap cover applied to turbofan aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710470568.3A CN109098791B (en) | 2017-06-20 | 2017-06-20 | Anti-icing structure and method for slide bar type cap cover applied to turbofan aircraft engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109098791A true CN109098791A (en) | 2018-12-28 |
| CN109098791B CN109098791B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710470568.3A Active CN109098791B (en) | 2017-06-20 | 2017-06-20 | Anti-icing structure and method for slide bar type cap cover applied to turbofan aircraft engine |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690353A (en) * | 1985-05-31 | 1987-09-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Electro-expulsive separation system |
| CN102242694A (en) * | 2010-05-12 | 2011-11-16 | 西门子公司 | De-icing and/or anti-icing of a wind turbine component by vibrating a piezoelectric material |
-
2017
- 2017-06-20 CN CN201710470568.3A patent/CN109098791B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690353A (en) * | 1985-05-31 | 1987-09-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Electro-expulsive separation system |
| CN102242694A (en) * | 2010-05-12 | 2011-11-16 | 西门子公司 | De-icing and/or anti-icing of a wind turbine component by vibrating a piezoelectric material |
Non-Patent Citations (1)
| Title |
|---|
| 陈来荣: "航空发动机中冰片运动轨迹的数值模拟研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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| Publication number | Publication date |
|---|---|
| CN109098791B (en) | 2020-09-08 |
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