CN104691772A - Static earthing system for airplane - Google Patents
Static earthing system for airplane Download PDFInfo
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- CN104691772A CN104691772A CN201310660157.2A CN201310660157A CN104691772A CN 104691772 A CN104691772 A CN 104691772A CN 201310660157 A CN201310660157 A CN 201310660157A CN 104691772 A CN104691772 A CN 104691772A
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- earthing
- grounding
- earth terminal
- static
- airplane
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Abstract
The invention aims to provide a convenient and safe static earthing system for an airplane, and solves the difficult problem of static earthing for the airplane. The static earthing system for the airplane comprises an earthing network, earthing terminal boards, and earthing terminals, and is characterized in that the earthing network is arranged underground, and is formed through the connection of vertical earthing bodies and horizontal earthing bodies; the static earthing terminals are connected with the earthing network through the earthing terminal boards, and are protruded on the ground. The static earthing system for the airplane has the advantages that simultaneous, rapid and reliable earthing of a plurality of airplanes in each hangar can be achieved, so that the working stability and reliability of the static earthing for the airplane are greatly improved, the safety of the airplane during daily maintenance is guaranteed, and the current requirements for static earthing of the airplane can be met; the quick earthing terminals achieve excellent electrical conductivity, high insulation, simplicity in actions, time conservation, as well as properties such as falling prevention, advanced misplug prevention, oil resistance, and high temperature resistance.
Description
Technical field
The invention belongs to the antistatic technique of anti static grounding technical field, particularly aircraft.
Background technology
Electrostatic is the electric charge being in relative static conditions in macro-scope.When the mutual friction of two kinds of object phases of different nature or contact, because they are different to the suction of electronics, between object, there is electro transfer, if the object be separated after friction is insulator, then electric charge cannot be revealed, and resting on body surface is relative static conditions.As long as be separated after the object contact of any two kinds of unlike materials and just can produce electrostatic, any time in life, any place all likely produce electrostatic.Will eliminate electrostatic possibility hardly completely, but can take some measures control electrostatic makes it not produce harm.The generation of electrostatic is inevitable in the industrial production, and its harm caused mainly can be summed up as harm that Electrostatic Discharge causes and these two kinds of mechanism of harm that electric attraction (ESA) causes.
For airplane design and the field of manufacture, electrostatic has following common harm:
1. can make aircraft electrification when the particulates such as airframe and air, steam, dust rub, thus can the normal work of severe jamming aircraft radio set, compass needle significantly be swung and can not be directed.
2. aloft filling test time, due to aircraft and bunkering facilities institute electrically charged different, just may produce spark discharge when contacting with each other, cause burning.
3., when the cleaning of ground gasoline airframe or parts etc. carry out various handling labor, also can cause fire due to aircraft with electrostatic, jeopardize aircraft and personal security.
4. because the fuel in fuel tanker constantly rocks, severe friction between fuel and oil tank wall, and the friction between the molecule of fuel own, can produce a large amount of static charges, when pasta static focus, fuel tank just may occur and fire on fire.
5., after aircraft landing, when putting passenger cabin working stand, if the electrostatic on body fails effectively to be discharged, staff can be shocked by electricity.
Before carrying out electrostatic improvement project, all there is serious defect in the anti static grounding connection lead connection mode of existing electrostatic grounding terminal and aircraft and the contact surface of connection lead, reliability; The anti static grounding system of hangar does not have a set of special anti static grounding net yet, is all the PE ground of the local hangar switch box used.Be specially:
6. one end that aircraft anti static grounding connection lead is connected with aircraft is fast-spliced splicing ear, and it is general all at 180mm that this splicing ear is interconnected contact surface
2above; Aircraft anti static grounding connection lead and special anti static grounding terminal box coupling end are electrostatic chuck (crocodile clamp), and the electrostatic ring contact surface in electrostatic chuck and anti static grounding terminal box is about 4mm
2left and right, such area of contact is unfavorable for the usual release of electrostatic.
7. the electrostatic ring connection reliability in electrostatic chuck and anti static grounding terminal box is not strong.Electrostatic ring is made into ring by round steel, but easy landing when electrostatic chuck is clipped on this ring, and electrostatic chuck after landing and electrostatic ring have larger gap, can not form sufficient current channel and carry out earial drainage.In addition, electrostatic chuck is generally by less spring wire at the tightness that support whole electrostatic chuck, uses a period of time rear spring steel wire to follow the string, can increase maintenance load and operating cost.
8. the ground connection of this hangar switch box and power supply phase line are all from far away total power distribution room of standing of taking a flight test, the line resistance of the cable self of so long distance is general larger, and hangar switch box limits due to condition, do not design ground connection during construction or hangar switch box ground connection do not taked iterative earth.
9. all facilities and equipments in the whole region of grounding connection of this hangar switch box, if on intrasystem equipment generation leakage current, open circuit, aging or other reasons band under the abnormal conditions such as higher voltage, will certainly at the electric charge making same current potential on the facilities and equipment band in whole system instantaneously; If now aircraft is also because some reason have accumulated the electrostatic of certain potentials, when both converges, because the electrostatic assembled can not be discharged preferably, aircraft can be made to be in a more dangerous environment.
In sum; existing anti static grounding system effectively can not meet the safety requirements to site environment such as aircraft, aviation off-the-shelf hardware, microelectronic component; therefore corresponding electrostatic prevention transformation must be carried out; to ensure that the electronic devices and components of aircraft finished product and other precisions are effectively protected, and make it normal operation.
Summary of the invention
The object of this invention is to provide the aircraft static ground system of a set of convenience, safety, to solve a difficult problem for aircraft static ground connection.
Aircraft static ground system of the present invention, comprises, grounding lattice, ground terminal daughter board, earth terminal, and it is characterized in that, grounding lattice is arranged at subsurface, and grounding lattice is connected to form by Grounding Grids and horizontal grounding objects; Electrostatic grounding terminal is connected with grounding lattice by ground terminal daughter board, and electrostatic grounding terminal is given prominence to and ground.
Grounding lattice adopts the mode of independent grounding, requires that grounding resistance is not more than 10 ohm.Each grounding lattice is Grounding Grids with 4 Zinc-coated angle steels, and horizontal grounding objects zinc-coated flat steel sheet is formed.Connect between grounding body and adopt welding manner, weld pitch does antiseptic and rustproof process.Grounding body ditching buries, and when subsidiary grounding grids distance footway is less than 3 meters, grounding body requires buried; If can not buried in time, thick pitch can be taked to do insulation processing.
For ensureing the Stability and dependability of the electrostatic grounding of aircraft, the connection of grounding lattice and the connection of ground terminal daughter board all adopt heat release fusion welding.Terminal board adopts metallic material, guarantees the stability of whole ground terminal daughter board.The connection that terminal clamp and ground connection are inserted: the maintenance of inserting for ease of ground terminal daughter board and ground connection, be designed to the cold connection of bolt, its transition resistance is less than 0.03 ohm; Or adopt soldering to be welded with the contact surface of terminal clamp by bolt, to reduce its transition resistance further.Meanwhile, ground connection is inserted with the design of male and female head, has system to move back head simultaneously, guarantee grounding jumper firmly be connected reliable.
Earth terminal comprises earth terminal cylinder and earth terminal concave volume, earth terminal concave volume is shaped with wrong insertion-proof slot and lock slots, and earth terminal cylinder design has trip-proof device, and the wrong insertion-proof slot on earth terminal concave volume and earth terminal cylinder match.
Lock slots on earth terminal concave volume is spiral fashion.
Earth terminal concave volume is designed with wrong insertion-proof slot and lock slots; Lock slots is designed to spiral fashion.After earth terminal cylinder enters lock slots along wrong insertion-proof slot, when earth terminal cylinder rotates clockwise, the trip-proof device of earth terminal cylinder will enter lock slots along screw-shaped track; Screw-shaped lock slots will reliably be fixed the conductor at two ends and link together, and the cross-sectional area of conductor at its two ends is linked together to greatest extent.
Earth terminal cylinder design has trip-proof device 1.Trip-proof device 1 enters lock slots by the wrong insertion-proof slot of earth terminal concave volume, and twists according to clockwise direction, and trip-proof device and lock slots failure-free are interlocked.This connecting mode can prevent from causing Electro-static Driven Comb to form the situations such as open circuit because pulling grounding connection line; In addition, trip-proof device is engaged the increasing of the sectional area that can also ensure two joint Terminals with reliable with lock slots failure-free.
For to meet in each hangar multi-aircraft simultaneously, fast, failure-free grounding requirement, this programme is designed to fast-spliced ground connection: in each hangar, arrange 1-3 overlap ground connection terminal box; Each earth terminal case is designed to 3 socket plug terminals; Earth terminal case is installed on ground or metope according to the particular case at scene; Ground terminal daughter board adopts copper coin to make, and is bolted on earth terminal case; Rapid grounding insert be require according to the Stability and dependability of aircraft static ground connection and the anti-loosening ground connection of custom-made insert.When earth terminal case is arranged on ground, terminal box should be above the ground level.Exempt from the destruction of the modes such as machinery for ground connection the inserting protecting earth terminal case, should steel plate protection be added.
Advantage of the present invention is: can to realize in each hangar multi-aircraft simultaneously, fast, failure-free grounding requirement, greatly improve working stability and the reliability of aircraft static ground connection, ensure the safety of aircraft in daily locomotive work, the demand of current aircraft static ground connection can be met; Rapid grounding terminal has splendid electric conductivity and good insulativity, action is simple, save time, slip-off preventing, advanced anti-mis-insertion, oil resistant, the characteristic such as high temperature resistant.
Accompanying drawing explanation
Fig. 1: rapid grounding terminal
Fig. 2: earth terminal cylinder
Fig. 3: earth terminal concave volume.
detailed description of the invention
Aircraft static ground system of the present invention, comprises, grounding lattice, ground terminal daughter board, earth terminal, and it is characterized in that, grounding lattice is arranged at subsurface, and grounding lattice is connected to form by Grounding Grids and horizontal grounding objects; Electrostatic grounding terminal is connected with grounding lattice by ground terminal daughter board, and electrostatic grounding terminal is given prominence to and ground.
Earth terminal comprises earth terminal cylinder and earth terminal concave volume, earth terminal concave volume is shaped with wrong insertion-proof slot and lock slots, and earth terminal cylinder design has trip-proof device, and the wrong insertion-proof slot on earth terminal concave volume and earth terminal cylinder match.
The material of earth terminal cylinder is brass, sees Fig. 2.Earth terminal cylinder design connects with ground terminal daughter board, and the screw rod being originally coupled through earth terminal cylinder one end carries out the cold connection of failure-free (crimping) with terminal clamp, and connection place is generally all less than 0.002 ohm by test.Earth terminal cylinder design has trip-proof device 1.Trip-proof device 1 enters lock slots 3 by the wrong insertion-proof slot 2 of earth terminal concave volume, and twists according to clockwise direction, and trip-proof device 1 and lock slots 3 failure-free are interlocked.This connecting mode can prevent from causing Electro-static Driven Comb to form the situations such as open circuit because pulling grounding connection line; In addition, trip-proof device 1 is engaged the increasing of the sectional area that can also ensure two joint Terminals with reliable with lock slots 3 failure-free.
The material of earth terminal concave volume is brass, sees Fig. 3.The design of earth terminal concave volume connects with equipment ground line, and grounding jumper is crimped in the wiring hole of earth terminal concave volume one end by two screws, and this crimping mode is generally all less than 0.002 ohm by transition resistance test.Earth terminal concave volume is designed with wrong insertion-proof slot 2 and lock slots 3; Lock slots 3 is designed to spiral fashion.After earth terminal cylinder enters lock slots 3 along wrong insertion-proof slot 2, when earth terminal cylinder rotates clockwise, the trip-proof device 1 of earth terminal cylinder will enter lock slots 3 along screw-shaped track; Screw-shaped lock slots 3 will reliably be fixed the conductor at two ends and link together, and the cross-sectional area of conductor at its two ends is linked together to greatest extent.
Protecting jacket is rubber, and it and earth terminal concave volume support the use, and its main purpose prevents people from directly contacting with unearthed grounding jumper or earth terminal.
To in each electrostatic grounding box, 3 earth points are installed.Ground connection box adopts ferrous material, inside establishes one piece of ground terminal daughter board, and according to specification of technical file, terminal clamp is installed the ground stud of 3 cover customizations.In order to ensure the reliability and stability that it connects, ground terminal daughter board and ground connection box are adopted and are screwed, and ground terminal daughter board and ground stud all adopt copper, and after being bolted, then weld with the soldering place of connecting.
To the ground connection outside hangar, ground stud adopts stainless steel, can avoid the corrosion phenomena under outdoor mode of operation.
Claims (4)
1. aircraft static ground system, comprises, grounding lattice, ground terminal daughter board and earth terminal, and it is characterized in that, grounding lattice is arranged at subsurface, and grounding lattice is connected to form by Grounding Grids and horizontal grounding objects; Electrostatic grounding terminal is connected with grounding lattice by ground terminal daughter board, and electrostatic grounding terminal protrudes from ground.
2. aircraft static ground system according to claim 1, is characterized in that, described earth terminal comprises earth terminal cylinder and earth terminal concave volume, and earth terminal is connected with ground terminal daughter board, and earth terminal concave volume connects with ground contact line.
3. aircraft static ground system according to claim 2, it is characterized in that, described earth terminal concave volume is shaped with wrong insertion-proof slot and lock slots, and earth terminal cylinder design has trip-proof device, and the wrong insertion-proof slot on earth terminal concave volume and earth terminal cylinder match.
4. aircraft static ground system according to claim 3, is characterized in that, the lock slots on described earth terminal concave volume is spiral fashion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660157.2A CN104691772B (en) | 2013-12-10 | 2013-12-10 | Static earthing system for airplane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660157.2A CN104691772B (en) | 2013-12-10 | 2013-12-10 | Static earthing system for airplane |
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| Publication Number | Publication Date |
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| CN104691772A true CN104691772A (en) | 2015-06-10 |
| CN104691772B CN104691772B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310660157.2A Active CN104691772B (en) | 2013-12-10 | 2013-12-10 | Static earthing system for airplane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107380465A (en) * | 2017-07-13 | 2017-11-24 | 江西洪都航空工业集团有限责任公司 | Collapsible undercarriage bonding jumper |
| CN109552662A (en) * | 2018-11-15 | 2019-04-02 | 中国直升机设计研究所 | A kind of unmanned helicopter cable ground connection layout method |
| JP2020147137A (en) * | 2019-03-13 | 2020-09-17 | 株式会社Ｓｕｂａｒｕ | aircraft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2958843A (en) * | 1956-12-18 | 1960-11-01 | Northrop Corp | Static grounding connection |
| CN2089231U (en) * | 1991-04-21 | 1991-11-20 | 国营秦川机械厂 | Device of earthing connection for carrying-off electrostatic charge |
| CN101304148A (en) * | 2008-07-09 | 2008-11-12 | 中铁一局集团有限公司 | Construction method for underground grounded screen |
| CN201338729Y (en) * | 2009-02-20 | 2009-11-04 | 中国舰船研究设计中心 | Static discharge device for airplane |
-
2013
- 2013-12-10 CN CN201310660157.2A patent/CN104691772B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2958843A (en) * | 1956-12-18 | 1960-11-01 | Northrop Corp | Static grounding connection |
| CN2089231U (en) * | 1991-04-21 | 1991-11-20 | 国营秦川机械厂 | Device of earthing connection for carrying-off electrostatic charge |
| CN101304148A (en) * | 2008-07-09 | 2008-11-12 | 中铁一局集团有限公司 | Construction method for underground grounded screen |
| CN201338729Y (en) * | 2009-02-20 | 2009-11-04 | 中国舰船研究设计中心 | Static discharge device for airplane |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107380465A (en) * | 2017-07-13 | 2017-11-24 | 江西洪都航空工业集团有限责任公司 | Collapsible undercarriage bonding jumper |
| CN107380465B (en) * | 2017-07-13 | 2020-04-28 | 江西洪都航空工业集团有限责任公司 | Folding landing gear grounding wire |
| CN109552662A (en) * | 2018-11-15 | 2019-04-02 | 中国直升机设计研究所 | A kind of unmanned helicopter cable ground connection layout method |
| CN109552662B (en) * | 2018-11-15 | 2021-07-23 | 中国直升机设计研究所 | Cable grounding layout method for unmanned helicopter |
| JP2020147137A (en) * | 2019-03-13 | 2020-09-17 | 株式会社Ｓｕｂａｒｕ | aircraft |
| JP7299720B2 (en) | 2019-03-13 | 2023-06-28 | 株式会社Subaru | aircraft |
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| CN104691772B (en) | 2017-01-25 |
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