冲压门作动筒2022432-4遇到的问题

heyongqiang · 发表于 2009-7-27 11:43:18

第一次维修反映故障是：作动不准确。经部件修理手册测试部分检查没有此故障。但也不知道在飞机上具体怎么工作的？需要哪位高手指导一下或者同样能够交流一下。
索赔故障：左组件超温。针对该故障测试作动筒根本无法测试出来，作动筒无非就是伸展和收缩测试。不知道在飞机上怎么引起此故障呢

scal320 · 发表于 2009-7-27 14:34:13

说实话，我们有时候拆下的件，直接都到了你们那里，我们也不敢保证真的是故障件。
说不定一检测就是好的，拿回来装机还是出了系统故障，但这个件应该是没有问题的。

如果是左组件超温，可能还有其他的部件故障导致。

heyongqiang · 发表于 2009-7-27 14:42:55

请问楼上的你见到过这个件号的冲压空气门作动筒吗？相关的件，我查资料还有很多，比如说控制器，还有温度传感器等等
这个件号是 B767-300的机型

heyongqiang · 发表于 2009-7-27 14:44:41

上面的如果有联系QQ的话给我留下来方便的时候可以探讨一下吗？另外该件在飞机上已经飞行了240小时拆了下来今天送到我们厂修理的

zouqingkai · 发表于 2009-7-31 00:38:59

看手册Maintenance Manual Part I
AMM21-50-00-28AIR CONDITIONING - COOLING - RAM AIR SYSTEM - FUNCTIONAL DESCRIPTION
General

The ram air system controls the air flow through the primary and secondary heat exchangers. These are the ram air system components:

Ram air controller

Ram air inlet actuator

Ram air control temperature sensor

Ram air inlet deflector door

Ram air inlet modulation panels

Ram air ducts.

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 de-energizes 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.

heyongqiang · 发表于 2009-7-31 08:29:03

感谢四楼的回答

la80762 · 发表于 2009-10-7 09:15:11

很正常，多积累经验就好了。

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