CN203528827U - Current limiter in onboard fuel oil tank inerting system - Google Patents
Current limiter in onboard fuel oil tank inerting system Download PDFInfo
- Publication number
- CN203528827U CN203528827U CN201320285061.8U CN201320285061U CN203528827U CN 203528827 U CN203528827 U CN 203528827U CN 201320285061 U CN201320285061 U CN 201320285061U CN 203528827 U CN203528827 U CN 203528827U
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- CN
- China
- Prior art keywords
- current
- oil tank
- fuel oil
- onboard fuel
- limiting apparatus
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- 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.)
- Expired - Lifetime
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Abstract
The utility model belongs to an onboard fuel oil tank inerting technique and relates to a current limiter in an onboard fuel oil tank inerting system. The current limited has a bowl-shaped structure, wherein current limiting guide holes are disposed on the bottom; and top peripheral diameter D of a taper-angle current limiting device is from 5.3 mm to 43 mm, bottom ex-circular diameter d is from 2 mm to 35 mm, and diameter A of the bottom current limiting guide holes is 1 mm. The current limiter in the onboard fuel oil tank inerting system in the utility model can be disposed on a flaring-type pipe joint in a sleeved manner, no extra installation component is needed and no guide pipe joint needs to be added. The current limited can increase reliability of the system and can be replaced and adjusted rapidly and conveniently in an inerting gas flow matching test.
Description
Technical field
The utility model belongs to airborne fuel-tank inert gas field, particularly relates to a kind of current-limiting apparatus for Fuel On Board case inerting system.
Background technology
Fuel On Board case inerting system can produce nitrogen-rich gas and be filled into and in fuel tank, make the oxygen concentration of fuel tank gas-phase space lower than below safety limit, thereby reduces the possibility that fuel tank fires.Aircraft inerting system is according to the gas consumption demand of different phase, with low discharge, middle flow and large three kinds of patterns of flow, fuel tank carried out to inerting, and whether its assignment of traffic has rationally determined that can the oxygen concentration field of gas-phase space in fuel tank keep in balance.For this reason, need carry out the current-limiting apparatus on inerting gas service pipes road and determine test, by adjusting the size of the current-limiting apparatus on pipeline, make the inerting gas flow reasonable distribution of each separation in fuel tank.In this process of the test, need current-limiting apparatus repeatedly to change adjustment, waste time and energy.
Summary of the invention
The purpose of this utility model is: for the pipe network system of flared type pipeline type of attachment, provide a kind of and can change quickly and easily the current-limiting apparatus for Fuel On Board case inerting system of adjusting, can greatly shorten flow matches test period.
The technical solution of the utility model is: a kind of current-limiting apparatus for Fuel On Board case inerting system, and this current-limiting apparatus is bowl type structure, bottom is provided with current limliting guide hole.
The cone angle of described current-limiting apparatus
the top circumference diameter D=5.3mm～43mm of current-limiting apparatus, bottom outside diameter d=2mm～35mm, bottom current limliting guide hole diameter A=1mm.
The utility model has the advantages that: for the pipe network system of flared type pipeline type of attachment, do not need extra installing component, also do not need to increase pipe joint, can improve the reliability of system.Metering hole is easy to adjust, and it is fast that current-limiting apparatus is changed speed, and flow matches test period is significantly shortened.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is section-drawing of the present utility model.
The specific embodiment
Below the utility model is described in further details.Referring to Fig. 1, a kind of current-limiting apparatus for Fuel On Board case inerting system, this current-limiting apparatus is bowl type structure, bottom is provided with current limliting guide hole.
The cone angle of described current-limiting apparatus
the top circumference diameter D=5.3mm～43mm of current-limiting apparatus, bottom outside diameter d=2mm～35mm, bottom current limliting guide hole diameter A=1mm.
Principle of work of the present utility model is: for fast assembling-disassembling, coordinate flared type pipeline type of attachment, the cone angle of current-limiting apparatus is decided to be
wall thickness is decided to be 1, and during actual use, the roughness of surfaces externally and internally is consistent, is set to 1.6.Top circumference diameter is consistent with the flat nozzle size of bottom outside diameter and dimension, in order to be convenient to adjust the size in metering hole aperture, in current-limiting apparatus bottom, is provided with the guide hole that aperture is 1mm.During use, be pressed between flare fitting and the sealing surface of flat ozzle, do not needed extra installing component, also do not needed to increase pipe joint, can be improved the reliability of system, guaranteed the fluid behaviour of leak tightness and pipeline.
Provide the parameter of three embodiment of the utility model below.
| ? | Top end diameter D | Bottom diameter d |
| Example 1 | 11 | 6 |
| Example 2 | 10 | 14.5 |
| Example 3 | 18 | 26 |
Claims (2)
1. for a current-limiting apparatus for Fuel On Board case inerting system, it is characterized in that, this current-limiting apparatus is bowl type structure, and bottom is provided with current limliting guide hole.
2. a kind of current-limiting apparatus for Fuel On Board case inerting system according to claim 1, is characterized in that the cone angle of described current-limiting apparatus
the top circumference diameter D=5.3mm～43mm of current-limiting apparatus, bottom outside diameter d=2mm～35mm, bottom current limliting guide hole diameter A=1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320285061.8U CN203528827U (en) | 2013-01-05 | 2013-05-23 | Current limiter in onboard fuel oil tank inerting system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320003765.1 | 2013-01-05 | ||
| CN201320003765 | 2013-01-05 | ||
| CN201320285061.8U CN203528827U (en) | 2013-01-05 | 2013-05-23 | Current limiter in onboard fuel oil tank inerting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203528827U true CN203528827U (en) | 2014-04-09 |
Family
ID=50415071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320285061.8U Expired - Lifetime CN203528827U (en) | 2013-01-05 | 2013-05-23 | Current limiter in onboard fuel oil tank inerting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203528827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700958A (en) * | 2021-09-08 | 2021-11-26 | 中国航空工业集团公司西安飞机设计研究所 | Flange plate device with detachable flow limiting hole |
-
2013
- 2013-05-23 CN CN201320285061.8U patent/CN203528827U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700958A (en) * | 2021-09-08 | 2021-11-26 | 中国航空工业集团公司西安飞机设计研究所 | Flange plate device with detachable flow limiting hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |
|
| CX01 | Expiry of patent term |