B737NG飞机在空中时，外部的冲压空气进气门是在什么位置

liangxiaolong3 · 发表于 2010-1-1 19:08:20

B737NG飞机在空中时，外部的冲压空气进气门是在什么位置，是关闭还是开着，还有APU进气门在空中的位置，希望有知道能告诉小弟一下

dwhou · 发表于 2010-1-1 19:52:50

冲压空气进气门位置可调,用来调节空调温度.
APU在空中使用时,APU进气门打开,不使用时关闭

旭日东升 · 发表于 2010-1-2 09:23:38

These are the three modes of control for the ram air system:
* Ground
* Flight (flaps not up)
* Flight (flaps up).
The air conditioning accessory unit (ACAU) relays control
power to the ram air controller and the ram air actuator.
There are separate control circuits for the left and right ram air
systems.
Ground Mode
When the airplane is on the ground, the AIR/GND sensing
system supplies a discrete (ground) to energize the K24 left air
ground relay, and the K23 left ram mod control relay.
When K23 relay is energized, 115v ac is supplied to the ram air
actuator. The left ram air actuator has internal switches that
connect power to the motor. The S1 switch supplies power to
the motor until the actuator is in the fully retracted position. This
opens the modulation panels and extends the deflector door.
When the actuator is in the fully retracted position, S1 opens to
remove power to the motor.
The deflector door is in the extended position when the actuator
shaft is between the S1 and S2 switch positions.
The S3 switch in the ram air actuator connects a ground to the
air conditioning/bleed air controls panel. This causes the left
RAM DOOR FULL OPEN light to come on.
Flight (Flaps Not Up)
At takeoff, the AIR/GND sensing system opens to de-energize
K24 left air ground relay. The K23 left ram mod control relay
stays energized with a ground from the trailing edge flaps up
switch when the flaps are not up.
When K24 relay is de-energized, 115v ac power is supplied to
the left ram air actuator. Power to the motor extend coils is
through the S2 switch at takeoff. The deflector door moves out of
the airstream when the actuator is at the S2 switch position.
The left RAM DOOR FULL OPEN light will be on.
Flight (Flaps Up)
In flight, when the flaps are at the full up position, K23 relay deenergizes
and 115v ac is supplied to the left ram air controller.
The ram air controller reads temperature signals from the ram
air control temperature sensor. The sensor sends signals from
the air cycle machine (ACM) compressor outlet. The controller
uses the air (temperature) sensor signal in a bridge circuit. The
bridge circuit reads the ACM compressor temperature as an
error signal, too hot or too cold. The nominal (balanced) control
temperature is 230F/110C. The output sends a retract (too hot)
signal through S3 or a (too cold) signal to extend the actuator
through S4. The switch positions S3 and S4 in the actuator are
the control limits for cruise mode.
If the pack is shut down in flight, the ram air modulation panels
fairs (closes) to decrease drag.
Training Information Point
If the DOOR FULL OPEN LIGHT is on during flight cruise mode,
it may be one of these three possible problems:
* The ram air system may have a blockage
* The heat exchangers are dirty
* Electrical failure.

逆风~飞扬 · 发表于 2010-1-2 12:04:25

外部冲压进气门有三个位置：1、地面全开位，2、空中襟翼未收上半开位，3、空中襟翼收上全关位
如果空中RAM DOOR FULL OPEN 灯亮，说明冲压进气门系统故障，或热交换器阻塞效率低下，230F传感器使冲压进气门全开来增大外界冷却空气流量
APU引气活门在停车后关闭，但它不完全关闭。为了防止在飞行时阻碍APU转动。（The air inlet door does not fully close. This prevents APU rotation during flight when the APU air inlet door is in the closed position ）查了好多资料，不清楚，是为了防止影响APU启动时转动，还是在空中APU风车转动，以提供一个停车后的完全冷却。

9111jie · 发表于 2010-1-5 11:26:25

让学习成为一种生活的习惯，多多交流

xupengzhifang · 发表于 2010-1-6 17:09:22

不是在发动机那里吗

jacky_key · 发表于 2010-1-16 20:37:52

如果地面apu需要引气才能启动，那么空中可不可以正常启动呢，怎么个原理，希望高手指导下

jialiu · 发表于 2010-1-16 20:50:06

外部冲压进气门有三个位置：1、地面全开位，2、空中襟翼未收上半开位，3、空中襟翼收上全关位

zsshuying · 发表于 2010-1-17 14:21:30

好不错的

boyin738 · 发表于 2010-2-12 21:21:14

在翼根！！2侧都有

gysun1012 · 发表于 2010-12-30 21:22:22

用来调节空调温度

111gaolong · 发表于 2010-12-30 21:25:58

APU在空中使用时,APU进气门打开,不使用时关

reb9829213052 · 发表于 2011-1-4 04:09:03

看手册呀

guiyi · 发表于 2011-1-6 12:14:24

机身下面空调舱左右不也有吗

XXOOXX · 发表于 2011-1-6 12:40:18

机身下面空调舱左右不也有

zhuzhuysf · 发表于 2012-9-7 11:27:22

空中巡航肯定是关闭的

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