请问燃油系统的过压保护器的作用及工作原理

黑马起航 · 发表于 2013-2-6 09:58:34

hjkl · 发表于 2013-2-6 10:33:00

The primary components of the overpressure protector are:
-    a body

-    a carbon disc (burst disc)

-    a collecting grid with a retaining ring.

One end of the body has a mounting flange which attaches it to the access panel 550CB(650CB). The burst disc is located at the other end of the body and is held in place with a flange. The collecting grid is held next to the burst disc with the retaining ring.
作用：平衡油箱内外压差。原理：
If a difference between external pressure and internal pressure occurs (which is more than the permitted tolerance), the burst disc breaks. If the burst disc breaks (because of low internal pressure), then the collecting grid does not let the pieces of the disc go into the vent surge tank.
The burst disc has a white cross painted on its lower side. When you can see this, the burst disc is not broken. The burst disc pressures are given in Table 001.

         -------------------------------------------------------

         ! Burst Disc       !          Pressure          !

         ! Function       !    (BAR)          (PSI)    !

         !----------------------!--------------------------------!

         !  Wing Surge Tank    !             !             !

         !  Atmosphere to Tank  !  0.20 to 0.30  !  2.9 to 4.35  !

         !  Tank to Atmosphere  !  0.45 to 0.50  !  6.5 to 7.25  !

         ---------------------- --------------- ----------------

               Surge Tank Burst-Disc Operation Pressures

                                 Table 001

再见理想 · 发表于 2013-4-8 11:45:37

当通气管出现堵塞或者压力加油故障时，会造成油箱内的压力过大，外侧油箱的燃油释压到内侧油箱，内侧的油箱和通气油箱通过过压保护器把燃油释放到机外，中央油箱过压时会释压到左侧内油箱！ $)OB[6B2][8E{4R_`J1VB)]4.jpg$

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[28燃油] 请问燃油系统的过压保护器的作用及工作原理

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