关于起落架上的表头

航线昌昌 · 发表于 2014-1-23 20:54:25

大家有没有注意到330-200主起落架减震支柱旁边有个表头，这个应该是支柱内的压力指示，那起落架上方也有2个表头是什么作用呢？（藏的蛮隐蔽的）

longwei · 发表于 2014-1-24 23:13:10

下面那个确实是减震支柱压力的
上面那个是正常刹车回油蓄压瓶，请看手册

蓄压瓶

Return Accumulator 5258GG 5259GG

(Ref. Fig. Accumulator SHEET 1)

One accumulator is installed on the leg of each MLG. Its function is to contain the initial large flow of fluid when the brakes are released. This makes sure that the brakes release smoothly and the return pressure decreases slowly.

The accumulator is an oleo-pneumatic unit with a steel cylinder which contains a flexible bladder. A charge valve permits the bladder to be pressurized with nitrogen. A nozzle assembly, which includes a spring and a poppet valve, lets pressurized hydraulic fluid go into the cylinder. The bladder keeps the nitrogen and the hydraulic fluid apart.

When the fluid chamber is unpressurized, the nitrogen pressure expands the bladder until it touches the poppet valve. The poppet valve closes to keep the bladder in the cylinder. When the fluid chamber is pressurized, the bladder size decreases until the the pressures in the gas and fluid chambers are equal. The spring keeps the poppet valve open. A small quantity of hydraulic fluid is contained in the gas side of the bladder. This makes sure that the bladder is not fully compressed. As the pressure at the fluid inlet decreases, the bladder expands and forces the hydraulic fluid from the fluid chamber. A small manifold 5210GG(5211GG) at the gas end of the accumulator holds a pressure gage 5224GG(5225GG) and a charge valve 5220GG(5221GG). The gage shows the gas (charge) pressure. And a green zone shows the correct gas charge pressure when the hydraulic pressure is not available.

liuyongji · 发表于 2014-1-25 15:29:40

看来真的是自己态度有问题

木木少 · 发表于 2014-1-25 17:37:52

牛人，观察仔细

航线昌昌 · 发表于 2014-1-27 19:47:24

longwei:下面那个确实是减震支柱压力的
上面那个是正常刹车回油蓄压瓶，请看手册

Return Accumulator 5258GG 5259GG

....... (2014-01-24 23:13)

它的功能是保持住初始大流量的液体当刹车松掉时，确保刹车平滑，回油压力减慢？是什么意思呢，兄弟？

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[A330] 关于起落架上的表头

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