CN111268152A - Lightning protection component of composite material paddle - Google Patents
Lightning protection component of composite material paddle Download PDFInfo
- Publication number
- CN111268152A CN111268152A CN201911223425.8A CN201911223425A CN111268152A CN 111268152 A CN111268152 A CN 111268152A CN 201911223425 A CN201911223425 A CN 201911223425A CN 111268152 A CN111268152 A CN 111268152A
- Authority
- CN
- China
- Prior art keywords
- blade
- lightning protection
- conductive metal
- working surface
- composite material
- 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.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title abstract description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 16
- 239000010951 brass Substances 0.000 claims abstract description 16
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 208000025274 Lightning injury Diseases 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
- B64D45/02—Lightning protectors; Static dischargers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T19/00—Devices providing for corona discharge
- H01T19/04—Devices providing for corona discharge having pointed electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Aviation & Aerospace Engineering (AREA)
- Wind Motors (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention discloses a lightning protection component of a composite material blade, wherein a nickel leading edge protective cover is fixedly adhered to the leading edge of the blade, which is close to the blade tip; the lightning protection braid takes the root axis of the blade as the center, is adhered and fixed on the working surface and the non-working surface of the blade, and is bent towards the rear edge at the position close to the blade tip; wrapping and fixing the lightning protection woven belts of the working surface and the non-working surface with the nickel leading edge shield by using a brass band, electrically communicating the brass band with the two lightning protection woven belts and the nickel leading edge shield, and bonding the brass band to the blade; the two lightning protection woven belts are respectively fixed on the paddle root metal outer sleeve by the compression joint of the conductive metal pressure head and the conductive metal screw at the paddle root and are electrically communicated with the paddle root metal outer sleeve, the conductive metal pressure plate and the conductive metal screw. The lightning protection component is arranged on the aircraft, so that the composite material blade can be prevented from being seriously damaged when flying in a lightning strike environment, the safety and the reliability of the composite material blade are greatly improved, and the maintenance cost of the composite material blade is reduced.
Description
Technical Field
The invention relates to a lightning protection component of a composite material blade.
Background
The aircraft with the traditional design adopts an all-metal skin structure, so that a good equipotential body is formed between the whole aircraft bodies, and when a lightning stroke occurs, lightning charges can be well released, so that the flight safety of the aircraft is ensured. Composite materials are now being used in great numbers on modern aircraft in order to reduce the weight of the aircraft structure, which represents the development direction of future aircraft. The application of the composite skin seriously reduces the shielding capability of the body structure to the external lightning electromagnetic environment.
The composite material is used in a large amount in the propeller structure, so that the conductivity of the propeller structure is reduced, and the propeller structure is easy to damage by lightning. If a lightning arc is attached to the surface of the composite material, under the initial action of the lightning arc, the outer matrix is firstly ablated, melted, burned and evaporated, then the lightning current contacts with the conductive carbon fibers, and the lightning charges are diffused and spread through each fiber bundle until the lightning charges are transferred to the nearest lightning channel. Under the action of high voltage and large current, the temperature of the fiber and the surrounding temperature thereof is rapidly increased, and when the temperature is higher than the critical temperature for the decomposition of the resin matrix, the resin matrix is gradually thermally decomposed, so that the fiber is completely exposed, the support of the resin matrix is lost, the rigidity and the strength of the whole composite material are rapidly reduced, and the structural damage is finally caused. The test shows that: under the condition of not taking lightning protection measures, after the composite material is subjected to lightning current of 60 kA-100 kA and the charge quantity of 1.9C, the composite material can be seriously damaged.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a lightning protection component of a composite material blade, and the lightning protection component is mounted on an aircraft, so that the composite material blade can be prevented from being seriously damaged when flying in a lightning environment, the safety and the reliability of the composite material blade are greatly improved, and the maintenance cost of the composite material blade is reduced.
In order to achieve the purpose, the technical solution of the invention is as follows: a lightning protection component of a composite material blade comprises a blade root metal outer sleeve, a conductive metal pressure head, a nickel leading edge shield, two lightning protection woven belts and a brass strip, wherein the two lightning protection woven belts and the brass strip are positioned in the blade skin; the nickel front edge shield is fixedly adhered to the front edge of the blade close to the blade tip; the lightning protection braid takes the root axis of the blade as the center, is adhered and fixed on the working surface and the non-working surface of the blade, and is bent towards the rear edge at the position close to the blade tip; wrapping and fixing the lightning protection woven belts of the working surface and the non-working surface with the nickel leading edge shield by using a brass band, electrically communicating the brass band with the two lightning protection woven belts and the nickel leading edge shield, and bonding the brass band to the blade; the two lightning protection woven belts are respectively fixed on the paddle root metal outer sleeve by the compression joint of the conductive metal pressure head and the conductive metal screw at the paddle root and are electrically communicated with the paddle root metal outer sleeve, the conductive metal pressure plate and the conductive metal screw.
The nickel leading edge shield can play a role in protecting the leading edge of the blade, can receive lightning striking the blade and plays a role in conduction. When the composite material blade is struck by lightning, the lightning is transmitted to the lightning-protection braid through the nickel leading edge shield, then transmitted to the propeller root outer sleeve through the lightning-protection braid, and finally transmitted to the propeller hub through the propeller root outer sleeve to form an equipotential body with the airplane, so that the composite material blade is prevented from being damaged by the lightning. The composite blade is light in weight and good in lightning protection effect, and the safety and reliability of the composite blade are greatly improved; the maintenance cost of the composite material blade is reduced, and meanwhile, the service life of the composite material blade is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1, the present embodiment includes a blade root metal sheath 1, a conductive metal pressure head 2, a nickel leading edge shield 6, two lightning protection ribbons 5 and a brass ribbon 7 located in a blade skin 8; the nickel front edge shield 6 is fixedly bonded on the front edge of the blade 4 close to the blade tip; the lightning protection ribbon 5 is adhered and fixed on the working surface and the non-working surface of the blade by taking the root axis of the blade as the center, and is bent towards the rear edge at the position close to the blade tip; the lightning protection woven belts 5 of the working surface and the non-working surface and the nickel leading edge shield 6 are wrapped and fixed together by using a brass band 7, and the brass band 7 is electrically communicated with the two lightning protection woven belts 5 and the nickel leading edge shield 6 and is bonded on the blade; the two lightning protection woven belts 5 are respectively fixed on the paddle root metal jacket 1 by the pressure head 2 of conductive metal and the conductive metal screw 3 in a compression joint mode at the paddle root and are electrically communicated with the paddle root metal jacket 1, the conductive metal pressure plate and the conductive metal screw 3.
There are, of course, many other embodiments of the invention and modifications and variations of this invention that will be obvious to those skilled in the art may be made without departing from the spirit and scope of the invention, but it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention.
Claims (1)
1. The utility model provides a component is hit in lightning protection of combined material paddle which characterized in that: the lightning protection device comprises a paddle root metal outer sleeve, a conductive metal pressure head, a nickel leading edge shield, two lightning protection woven belts and a brass strip, wherein the two lightning protection woven belts and the brass strip are positioned in the paddle blade skin; the nickel front edge shield is fixedly adhered to the front edge of the blade close to the blade tip; the lightning protection braid takes the root axis of the blade as the center, is adhered and fixed on the working surface and the non-working surface of the blade, and is bent towards the rear edge at the position close to the blade tip; wrapping and fixing the lightning protection woven belts of the working surface and the non-working surface with the nickel leading edge shield by using a brass band, electrically communicating the brass band with the two lightning protection woven belts and the nickel leading edge shield, and bonding the brass band to the blade; the two lightning protection woven belts are respectively fixed on the paddle root metal outer sleeve by the compression joint of the conductive metal pressure head and the conductive metal screw at the paddle root and are electrically communicated with the paddle root metal outer sleeve, the conductive metal pressure plate and the conductive metal screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223425.8A CN111268152A (en) | 2019-12-03 | 2019-12-03 | Lightning protection component of composite material paddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223425.8A CN111268152A (en) | 2019-12-03 | 2019-12-03 | Lightning protection component of composite material paddle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111268152A true CN111268152A (en) | 2020-06-12 |
Family
ID=70996830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911223425.8A Pending CN111268152A (en) | 2019-12-03 | 2019-12-03 | Lightning protection component of composite material paddle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111268152A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3923421A (en) * | 1974-12-19 | 1975-12-02 | United Technologies Corp | Lightning protected composite helicopter blade |
| US4944655A (en) * | 1988-05-10 | 1990-07-31 | Mtu Motoren- Und Turbinen-Union Munich Gmbh | Propeller blade of a fiber-reinforced plastic material |
| US5863181A (en) * | 1995-11-29 | 1999-01-26 | Eurocopter France | Blade with shielding for enhanced protection against lightning, for rotocraft rotor |
| US20150147183A1 (en) * | 2013-11-26 | 2015-05-28 | Cessna Aircraft Company | Propeller With Lightening Strike Protection |
| CN105314106A (en) * | 2014-06-06 | 2016-02-10 | 哈尔滨飞机工业集团有限责任公司 | Helicopter rotor bonding structure |
| US20170334577A1 (en) * | 2016-05-23 | 2017-11-23 | Ratier-Figeac Sas | Propeller blade sheath |
| CN108032979A (en) * | 2017-12-04 | 2018-05-15 | 惠阳航空螺旋桨有限责任公司 | A kind of leading edge safeguard structure of alloy matrix aluminum blade |
| CN108266335A (en) * | 2017-12-18 | 2018-07-10 | 洛阳双瑞风电叶片有限公司 | A kind of wind power plant blade lightning protection device |
-
2019
- 2019-12-03 CN CN201911223425.8A patent/CN111268152A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3923421A (en) * | 1974-12-19 | 1975-12-02 | United Technologies Corp | Lightning protected composite helicopter blade |
| US4944655A (en) * | 1988-05-10 | 1990-07-31 | Mtu Motoren- Und Turbinen-Union Munich Gmbh | Propeller blade of a fiber-reinforced plastic material |
| US5863181A (en) * | 1995-11-29 | 1999-01-26 | Eurocopter France | Blade with shielding for enhanced protection against lightning, for rotocraft rotor |
| US20150147183A1 (en) * | 2013-11-26 | 2015-05-28 | Cessna Aircraft Company | Propeller With Lightening Strike Protection |
| CN105314106A (en) * | 2014-06-06 | 2016-02-10 | 哈尔滨飞机工业集团有限责任公司 | Helicopter rotor bonding structure |
| US20170334577A1 (en) * | 2016-05-23 | 2017-11-23 | Ratier-Figeac Sas | Propeller blade sheath |
| CN108032979A (en) * | 2017-12-04 | 2018-05-15 | 惠阳航空螺旋桨有限责任公司 | A kind of leading edge safeguard structure of alloy matrix aluminum blade |
| CN108266335A (en) * | 2017-12-18 | 2018-07-10 | 洛阳双瑞风电叶片有限公司 | A kind of wind power plant blade lightning protection device |
Non-Patent Citations (1)
| Title |
|---|
| 庄严等: "《实用电子电路及电气故障查找技术》", 31 March 2016, 辽宁科学技术出版社 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200612 |
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| RJ01 | Rejection of invention patent application after publication |