Hydraulic System（二）

2018年08月30日周四

Hydraulic System

78

Daily English Of Dispatcher  

Hydraulic System

Hydraulic System A

01

每套液压系统都有一个位于主轮舱区域的液压储油箱,A系统和B系统独立运行,由引气增压。一液压维护管路将液压系统B和备用系统连接。

Each hydraulic system has a fluid reservoir located in the main wheel well area. System A and B reservoirs are pressurized by bleed air. The standby system reservoir is connected to the system B reservoir for pressurization and servicing. 

A和B两个液压系统都具有一个发动机驱动泵和一个交流电动马达驱动泵。

Both A and B hydraulic systems have an engine–driven pump and an AC electric motor–driven pump. 

A系统的发动机驱动泵由1号发动机提供动力，而B系统的发动机驱动泵则由2号发动机提供动力。

The system A engine–driven pump is powered by the No.1 

engine and the system B engine–driven pump is powered by the No. 2 engine.

一台发动机驱动的液压泵所提供的液压油量约是相应电动马达驱动泵的6倍。

An engine–driven hydraulic pump supplies approximately 6 times the fluid volume of the related electric motor–driven hydraulic pump.

System A Hydraulic Leak

如果发动机驱动泵或相关的管路发生渗漏现象，液压油箱内的一个竖管可防止系统内的液压油全部漏光。

If a leak develops in the engine–driven pump or its related lines, a standpipe in the reservoir prevents a total system fluid loss.

当液压油面达到竖管的顶部位置时，液压油箱的指示约为全满位的20％。A系统的液压压力是由电动马达驱动泵来保持的。

With fluid level at the top of the standpipe, the reservoir quantity displayed indicates approximately 20% full. 

System A hydraulic pressure is maintained by the electric motor–driven pump.

如果在电动马达驱动泵或其相应的管路，或两台发动机和电动马达驱动泵共用部件中发生渗漏，则液压油箱内油量将稳定地减少到零，并且全部系统失去压力。

If a leak develops in the electric motor–driven pump or its related lines, or components common to both the engineand electric motor–driven pumps, the quantity in the reservoir steadily decreases to zero and all system pressure is lost.

Hydraulic System B

02

B系统泄露

如果任一泵、管路或B系统组件出现漏油，液压油量下降直至指示为零，且B系统压力丧失。

If a leak develops in either pump, line or component of system B, the quantity decreases until it indicates approximately zero and systemB pressure is lost.

B系统液压油箱有一竖管，向发动机驱动泵和电动马达驱动泵提供液压油。

The system B reservoir has one standpipe which supplies fluid to both the engine–driven pump and the electric motor–driven pump.

但是，当液压油面在竖管的顶端时，B系统油箱中的剩余液压油量足以满足动力转换组件的工作。

However, with fluid level at the top of the standpipe, fluid remaining in the system B reservoir is sufficient for power transfer unit operation.

液压B系统内的渗漏不会影响到备用液压系统的工作。

A leak in system B does not affect the operation of the standby hydraulic system.

动力转换组件（PTU）的作用是当B系统发动机驱动的液压泵内油量泄漏后，为自动缝翼和前缘襟翼和缝翼以正常速率工作提供所需的额外液压油量。

The purpose of the PTU is to supply the additional volume of hydraulic fluid needed to operate the autoslats and leading edge flaps and slats at the normal rate when system B engine–driven hydraulic pump volume is lost. 

PTU使用A系统的压力带动一个液压马达驱动泵，这样可以给B系统的液压油增压。

The PTU uses system A pressure to power a hydraulic motor–driven pump, which pressurizes system B hydraulic fluid. 

起落架转换组件的作用是在A系统发动机驱动泵液压油泄漏后，为起落架以正常速率收上提供所需的液压油量。

The purpose of the landing gear transfer unit is to supply the volume of hydraulic fluid needed to raise the landing gearat the normal rate when system A engine–driven pump volume is lost. 

B系统发动机驱动泵为操作起落架转换组件提供所需的液压油量。

The system B engine–driven pump supplies the volume of hydraulic fluid needed to operate the landing gear transfer unit. 

Standby

03

如果A和/或B系统无压力，备用液压系统可作为后备。备用系统可人工或自动起动，并使用一个电动马达驱动泵向下列设备供压：

· 反推装置

· 方向舵

· 前缘襟翼和缝翼（仅放出）

· 备用偏航阻尼器。

The standby hydraulic system is provided as a backup if system A and/or B 

pressure is lost. The standby system canbe activated manually or automatically 

and uses a single electric motor–driven pump to power:

· thrust reversers

· rudder

· leading edge flaps and slats (extend only)

· standby yaw damper.

一旦A、B停止运转，备用系统能向方向舵、前缘装置、自动缝翼和反推提供液压。

When system A and B stop operating, the backup system can provide hydraulic pressure to the rudder, the leading edge device, the autoslats and the reverser.

副翼,升降舵和方向舵，由双重液压源提供动力（液压A和B）。

Ailerons, elevator and rudder, powered by double hydraulic source (hydraulic A and B).

任一液压系统都能操纵所有的主飞行操纵面。液压系统A和B失效时，副翼,升降舵可以人工操纵；方向舵可由备用液压系统操纵。

Both A and B hydraulic system can operate all main flight control surfaces.When hydraulic systems A and B fail, ailerons and lifters can be operated manually;The rudder can be operated by an alternate hydraulic system.

To Be Continued.......