CN201774249U - Lightning protection device for helicopter L-shaped airspeed tube electric heating deicing system - Google Patents
Lightning protection device for helicopter L-shaped airspeed tube electric heating deicing system Download PDFInfo
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- CN201774249U CN201774249U CN201020500019XU CN201020500019U CN201774249U CN 201774249 U CN201774249 U CN 201774249U CN 201020500019X U CN201020500019X U CN 201020500019XU CN 201020500019 U CN201020500019 U CN 201020500019U CN 201774249 U CN201774249 U CN 201774249U
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- lightning
- electric heating
- helicopter
- thunder
- heating deicing
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Abstract
The utility model discloses a lightning protection device for a helicopter L-shaped airspeed tube electric heating deicing system, which is characterized in that lightning-protection apparatus lightning suppressors in high-impedance state in normal work are parallelly connected to two ends of a power wire of an electric heating deicing device and provide release passages for lightning when in lightning stroke. When an aircraft normally flies, the lightning protection device in high-impedance state has no impact on normal work of a helicopter L-shaped airspeed tube electric heating device. Once a helicopter L-shaped airspeed tube is struck by lightning and when high lightning voltage and high lightning current sensed on an electric heating deicing device surpass nominal voltage and nominal current of the lightning suppressors, the lightning suppressors can effectively protect an internal power source and equipment of a helicopter by suppressing and releasing the high lightning voltage and the high lightning current sensed on the electric heating deicing device.
Description
Technical field
The utility model relates to the lightning protection circuit of helicopter L type pitot electric heating deicer.
Background technology
When freezing on the helicopter pitot, can badly influence the service behaviour of helicopter pitot, for this reason, deicer is installed usually on the helicopter pitot.At present, be applied in and mostly be electrically heated form greatly in the helicopter L type pitot heating deicer, thereby can heat the icing phenomenon of eliminating on the pitot to the helicopter pitot fast, the operate as normal of assurance helicopter pitot; But, because the helicopter pitot is aircraft thunderbolt district occurred frequently normally, and the required power supply of helicopter pitot electric heating deicer is to be provided by the interior of aircraft power supply, therefore when the helicopter pitot is struck by lightning, on the electric heating deicer with induction lightening high voltage and thunder amplification current, and can enter interior of aircraft, thereby aircraft is caused the harm that is difficult to predict along the power line of electric heating deicer.Present domestic helicopter L type pitot electric heating deicer does not all carry out lightning protection design mostly, so in a single day helicopter L type pitot be struck by lightning, and the harm consequence of its generation will be difficult to estimation.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of electric heating deicing system thunderstorm electricity protective device being provided, to guarantee Helicopter Safety.
The utility model technical solution problem adopts following technical scheme:
The design feature of utility model helicopter L type pitot electric heating deicing system thunderstorm electricity protective device is the power line two ends at the electric heating deicer, be arranged in parallel and be high-impedance state in normal operation, the thunder and righting blanker of leakage path is provided for thunder and lightning under the thunderbolt state.
The design feature of the utility model electric heating deicing thunderstorm electricity protective device also is:
Described thunder and righting blanker is metal zinc oxide pottery pressure-sensitive device or Transient Suppression Diode device.
Described thunder and righting blanker is to be constituted by metal zinc oxide pottery pressure-sensitive device and the parallel connection of Transient Suppression Diode device.。
In the utility model, when the helicopter normal flight, thunder and righting blanker presents high-impedance state, does not influence helicopter L type pitot operate as normal; When in case helicopter L type pitot is struck by lightning; when the thunder and lightning high voltage of responding on the L type pitot electric heating deicer and thunder amplification current surpass the nominal voltage of thunder and righting blanker and electric current; thunder and righting blanker will be according to the non-linear voltage-current characteristic of self; thunder and lightning high voltage and the thunder amplification current responded on the L type pitot electric heating deicer are suppressed to release; compared with the prior art, the utility model can be implemented effectively protection to helicopter internal electric source and equipment.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Fig. 2 is the theory of constitution figure of thunder and righting blanker in the utility model.
Embodiment
Present embodiment is at the two ends of helicopter L type pitot power line, is arranged in parallel to be high-impedance state in normal operation, and the part thunder and righting blanker of leakage path is provided for thunder and lightning under the thunderbolt state.
Thunder and righting blanker in concrete the enforcement is described as follows:
Shown in Figure 1; thunder and righting blanker 7 can be metal zinc oxide pottery pressure-sensitive device; during normal condition; under interior of aircraft power supply V effect; metal zinc oxide pottery pressure-sensitive device is high-impedance state; when the thunder and lightning high voltage of induction on the helicopter L type pitot electric heating deicer 2 exceeds the nominal voltage value scope of selected metal zinc oxide pottery pressure-sensitive device; metal zinc oxide pottery pressure-sensitive device will present low resistive state according to the non-linear voltage-current characteristic of self; thereby thunder and lightning high voltage and the thunder amplification current responded on the helicopter L type pitot electric heating deicer are suppressed to release, play the effect of protection interior of aircraft power supply and equipment.
Shown in Figure 1; thunder and righting blanker 7 also can be the Transient Suppression Diode device; the effect of Transient Suppression Diode is when helicopter L type pitot 1 is subjected to thunder and lightning transient state high energy impact events; make the voltage clamp that enters electric heating deicer power line two ends in the safe range of helicopter internal electric source, thereby helicopter internal electric source and equipment are effectively protected.
Shown in Figure 2, thunder and righting blanker can also be to be constituted by metal zinc oxide pottery pressure-sensitive device R and Transient Suppression Diode device TVS parallel connection, and wherein the Transient Suppression Diode device can be check configuration, also can be bi-directional configuration.
Circuit structure in concrete the enforcement is described as follows:
Shown in Figure 1, the heating live wire 4 of helicopter L type pitot electric heater unit 2 is by the binding post 5 of thunder and righting blanker 7, and be " V " type with binding post 5 and guide interior of aircraft power supply V into, the heating ground wire 3 of helicopter L type pitot electric heater unit 2 and the earth terminal 6 of thunder and righting blanker 7 are guided ground GND respectively nearby into.
Lightning protection circuit of the present utility model has good anti-lightning impact effect, can effectively protect helicopter internal electric source and equipment.
Claims (3)
1. helicopter L type pitot electric heating deicing system thunderstorm electricity protective device is characterized in that the power line two ends at the electric heating deicer, is arranged in parallel to be high-impedance state in normal operation, and the thunder and righting blanker of leakage path is provided for thunder and lightning under the thunderbolt state.
2. electric heating deicing system thunderstorm electricity protective device according to claim 1 is characterized in that described thunder and righting blanker is metal zinc oxide pottery pressure-sensitive device or Transient Suppression Diode device.
3. electric heating deicing system thunderstorm electricity protective device according to claim 1 is characterized in that described thunder and righting blanker is to be constituted by metal zinc oxide pottery pressure-sensitive device and the parallel connection of Transient Suppression Diode device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020500019XU CN201774249U (en) | 2010-08-16 | 2010-08-16 | Lightning protection device for helicopter L-shaped airspeed tube electric heating deicing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020500019XU CN201774249U (en) | 2010-08-16 | 2010-08-16 | Lightning protection device for helicopter L-shaped airspeed tube electric heating deicing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774249U true CN201774249U (en) | 2011-03-23 |
Family
ID=43754086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020500019XU Ceased CN201774249U (en) | 2010-08-16 | 2010-08-16 | Lightning protection device for helicopter L-shaped airspeed tube electric heating deicing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201774249U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226367A (en) * | 2013-05-10 | 2013-07-31 | 中航通飞研究院有限公司 | Airspeed head heating system |
| CN107272773A (en) * | 2016-04-06 | 2017-10-20 | 哈尔滨飞机工业集团有限责任公司 | A kind of pitot/baroport heating system |
-
2010
- 2010-08-16 CN CN201020500019XU patent/CN201774249U/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226367A (en) * | 2013-05-10 | 2013-07-31 | 中航通飞研究院有限公司 | Airspeed head heating system |
| CN103226367B (en) * | 2013-05-10 | 2015-06-10 | 中航通飞研究院有限公司 | Airspeed head heating system |
| CN107272773A (en) * | 2016-04-06 | 2017-10-20 | 哈尔滨飞机工业集团有限责任公司 | A kind of pitot/baroport heating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20150902 Decision number of declaring invalidation: 26873 Granted publication date: 20110323 |
|
| IW01 | Full invalidation of patent right |