3505920 TGA/MSOV/ISOLATOR ASSEMBLY

一、名称

TGA/MSOV/ISOLATOR ASSEMBLY

涡轮齿轮箱/调节关断活门/隔离器组件

二、件号

3505920-5~-9

三、章节号

29-11-25

四、适用机型

B777-200

五、系统

29 HYDRAULIC POWER

液压

六、安装位置

the left wing-to-body fairing behind the left wheel well

两套ADP组件位于左侧机翼与机身整流罩内，紧邻左侧轮舱后方。

七、部件原理

1.The turbine gearbox/modulating shutoff valve/isolator assembly changes compressed air pressure into mechanical force to drive a hydraulic pump at a constant speed. The physical and operational characteristics of the turbine gearbox/modulating shutoff valve/isolator assembly are shown in Table 1.

涡轮齿轮箱/调节关断活门/隔离器组件将压缩空气压力转化为机械力，以恒定速度驱动液压泵。该组件的物理及运行特性详见表1。

2. Operation

操作说明

A. Turbine Gearbox/Modulating Shutoff Valve/Isolator Assembly (Subtask 29-11-25-870-003-A01)

涡轮齿轮箱/调节关断活门/隔离器组件（子任务29-11-25-870-003-A01）

(1) The turbine gearbox/modulating shutoff valve/isolator assembly is a pneumatically powered drive assembly. This assembly supplies output shaft power to drive the hydraulic pump part of the air driven pump assembly. Pneumatic power is supplied to the TGA/MSOV/Isolator Assembly through ducting that can supply bleed air from either of the main engines, or the auxiliary power unit.

涡轮齿轮箱/调制关断活门/隔离器组件为气动驱动装置。该组件通过输出轴动力驱动气动泵组件中的液压泵部分. 气动动力通过管道输送至TGA/MSOV/隔离器组件，该管道可从任一主发动机或辅助动力装置获取引气。

(2) The turbine gearbox/modulating shutoff valve/isolator assembly has an isolator assembly to contain the noise made by the turbine gearbox/modulating shutoff valve/isolator assembly. The turbine gearbox/modulating shutoff valve/isolator assembly incorporates a primary and secondary speed control. Normal operation will occur with the primary speed control. The primary speed control uses the logic speed control unit, mounted on the aircraft to control the output speed of the turbine gearbox/modulating shutoff valve/isolator assembly. The primary speed control has a reserve power mode, which will increase the output shaft speed (Refer to Table 1 ). The modulating and shutoff valve assembly is only operated as a shutoff valve when the turbine gearbox/modulating shutoff valve/isolator assembly is in normal operation.

该组件配备隔离器装置以抑制涡轮齿轮箱/调节关断活门/隔离器组件产生的噪音。涡轮齿轮箱/调节关断活门/隔离器组件包含主/备用转速控制系统。正常运行时采用主转速控制，该控制通过安装在飞机上的逻辑转速控制单元调节涡轮齿轮箱/调节关断活门/隔离器组装的输出转速。主转速控制具备备用功率模式，可提升输出轴转速（参见表1）。调节关断活门组件仅在涡轮齿轮箱/调节关断活门/隔离器组件处于正常运行状态时作为关断活门使用。

(3) The secondary speed control unit is a backup speed control, and will be used only after failure of the primary speed control. The speed that the secondary speed control sets is higher than the primary (Refer to Table 1). After failure of the primary control, if the turbine gearbox/modulating shutoff valve/isolator assembly speed increases, it will pass into the normal operating range of the secondary speed control. Because the modulating and shutoff valve assembly can only be opened with electrically controlled pneumatic pressure,the secondary speed control will only operate if electrical and pneumatic power are available. The modulating and shutoff valve assembly, under the control of the secondary speed control assembly (part of the turbine gearbox assembly), will adjust the amount of airflow to the turbine gearbox assembly when the primary speed control fails.

备用转速控制单元为备用速度控制装置，仅在主控系统失效后启用。备用控制设定的转速高于主控系统（参见表1）。当主控制失效后，若涡轮齿轮箱/调节关断活门/隔离器组件转速上升，将进入备用速度控制的正常工作范围。由于调节关断活门组件仅能通过电控气压开启，因此备用速度控制仅在电力和气源同时可用时才起作用。当主速控失效时，调节关断活门组件在备用速控组件（涡轮齿轮箱组件的一部分）控制下，将调节流向涡轮齿轮箱组件的气流量。

(4) A heater assembly was added to supply heat to the modulating and shutoff valve assembly and the turbine gearbox assembly. The heater assembly ensures the high altitude operation of the turbine gearbox/modulating shutoff valve/isolator assembly.

新增加热器组件为调节关断活门组件及涡轮齿轮箱组件提供热源。加热器组件确保涡轮齿轮箱/调节关断活门/隔离器组件的高空运行能力。

3. Lubrication

润滑

A. General

概述

(1) Lubricants per MIL-PRF-23699 STD*, MIL-L-7808 or MIL-PRF-7808 are approved for use in all Honeywell air turbine starters. In addition, Honeywell air driven units identified with “MIL-L-23699 HTS”** or “MIL-PRF-23699 HTS” on the lubrication plate are approved for use with lubricants complying with MIL-PRF-23699 HTS. Note that as of July 2002 the latest revision of the qualified products list for MIL-PRF-23699 and MIL-PRF-7808 can be found at the following web site (http://everyspec.com) and entering QPL-23699 or QPL-7808 into the document ID field.

所有霍尼韦尔空气涡轮启动机均批准使用符合MIL-PRF-23699 STD*、MIL-L-7808或MIL-PRF-7808标准的润滑剂。此外，润滑标牌标注“MIL-L-23699 HTS”**或“MIL-PRF-23699 HTS”的霍尼韦尔空气驱动装置，经批准可使用符合MIL-PRF-23699 HTS标准的润滑剂. 请注意，截至2002年7月，MIL-PRF-23699和MIL-PRF-7808合格产品清单的最新修订版可通过以下网址查阅（http://everyspec.com），在文档ID字段输入QPL-23699或QPL-7808即可检索。

NOTE:

*STD = Standard (older generation MIL-L-23699 oils except for Mobil 254)

*STD = 标准型（除美孚254外的老一代MIL-L-23699油品）

**HTS = High Thermal Stability.

**HTS = 高热稳定性油。

(2) Honeywell air driven units with lubrication plates that do not specifically call out HTS oils should not be serviced with HTS oils.

配备润滑标牌的霍尼韦尔空气驱动装置若未明确标注需使用HTS油，则不得使用HTS油进行维护。

(3) Use of HTS oil in a NON-HTS compatible Honeywell air turbine starter may result in oil leakage. If HTS oil is inadvertently used in a NON-HTS Honeywell air driven unit, replacing the HTS oil with a STD oil will further increase the risk of oil leakage, Mobile Jet Oil 291 is the one exception where changing to a MIL-PRF-23699 STD oil is recommended.

在非HTS兼容型霍尼韦尔空气涡轮启动装置中使用HTS油可能导致漏油。若误将HTS油用于非HTS型霍尼韦尔空气驱动装置，更换为STD油将进一步增加漏油风险，美孚Jet Oil 291是唯一例外——建议改用MIL-PRF-23699 STD油。

(4) Mixing ATS/ATM Turbine Engine Oils

混合型涡轮发动机油

(a) For Non-HTS turbine engine oils, mixing MIL-PRF-7808 and MIL-PRF-23699 should not measurably degrade the performance in most applications. Mixing these types of oils can change the viscosity which could affect cold operations when adding MIL-PRF-23699 to MIL-PRF-7808 or could affect long term wear of internal components when adding MIL-PRF-7808 to MIL-PRF-23699. For suitable environment, no other changes are likely to occur. It is recommended that the unit be drained of the old oil type and replaced with the new oil type. There should be no restrictions mixing “brands” of oil if the oils are compliant with the appropriate MIL-spec. Since additive packages may differ between brands there may be some change in performance.

非高温型涡轮发动机油中，MIL-PRF-7808与MIL-PRF-23699的混合在多数应用场景下不会显著降低性能。混合此类油品可能改变粘度：向MIL-PRF-7808中添加MIL-PRF-23699可能影响低温运行性能；向MIL-PRF-23699中添加MIL-PRF-7808可能影响内部部件长期磨损。在适宜环境下，通常不会引发其他变化。建议将设备中的旧油排空后更换为新油。若各品牌油品均符合相应军用标准，则混合使用并无限制。但因添加剂配方可能存在差异，性能表现或有微调。

八、工作参数

九、在系统中工作原理

Purpose

用途

Two air driven pump (ADP) pumps are the demand pumps for the center hydraulic system.

两台空气驱动泵（ADP）是中心液压系统的需求泵。

General Description

概述

Each ADP pump is part of an ADP assembly. The ADP assembly also has an air drive unit (ADU). The ADU contains these components:

每台ADP泵均属于ADP组件的一部分。ADP组件还包含空气驱动单元（ADU），其内部组件包括：

* Turbine gearbox assembly (TGA)

涡轮齿轮箱组件（TGA）

* Modulating shutoff valve (MSOV)

调节式关断活门（MSOV）（PN:3215394）

* Air drive unit (ADU) heater.

空气驱动单元（ADU）加热器

A mount truss assembly attaches each ADP assembly to the airplane structure. The mount truss assembly for ADP assembly C1 is not the same as the one for ADP assembly C2.The ADP assemblies use airplane pneumatic power to operate.An inlet duct supplies air pressure to each ADU. The MSOVs let air flow to the turbine of the TGAs. The gearbox of TGAs reduces the turbine speed and operates the pump. ADU heaters are on the ADUs to prevent ice formation. The pumps connect directly to the TGAs. The airflow from the TGAs exits the airplane through two exhaust ducts and two exhaust vents directly aft of the ADP assemblies.The two TGAs have the same components. The turbine housing of ADP assembly C1 is different than the turbine housing for ADP assembly C2 to permit the exhaust ducts to be near each other.Two ADP logic speed control units (LSCU), one for each ADP assembly, control the pump operation. The LSCUs supply speed control and overspeed protection to the TGAs. The LSCUs are circuit card assemblies and are LRUs.A wiring harness for each ADP assembly connects the LSCU to the MSOV and the TGA.The ADP pumps are the same as the engine driven pumps.The ADP pump is rated at 53 gpm at 4315 rpm. A reserve mode permits the pump to supply 63 gpm at 5160 rpm. The pumps are LRUs.

安装桁架组件将每个ADP组件固定于飞机结构上。ADP组件C1的安装桁架组件与ADP组件C2的安装桁架组件不同。ADP组件利用飞机气动动力运行。进气管道为每个ADU提供气压。MSOV使空气流向TGA的涡轮。TGA的齿轮箱降低涡轮转速并驱动泵运行。ADU加热器安装在ADU上以防止结冰。泵直接连接至TGA。TGA的空气流通过两条排气管道和两个排气口排出飞机，这些排气口位于ADP组件正后方。两台TGA的组件相同。ADP组件C1的涡轮外壳与ADP组件C2的涡轮外壳不同，以便排气管道能靠近布置。两套ADP逻辑转速控制单元（LSCU）分别控制各ADP组件的泵运行。LSCU为TGA提供转速控制与超速保护功能，其结构为电路板组件，属于可更换单元（LRU）。每套ADP组件的线束将LSCU与MSOV及TGA相连。ADP泵与发动机驱动泵规格相同。ADP泵额定工况为4315转/分时输出53加仑/分钟。备用模式下可于5160转/分输出63加仑/分钟。该泵组为可更换部件。

Location

The two ADP assemblies are in the left wing-to-body fairing behind the left wheel well. The LSCUs are also in this compartment.

位置

两套ADP组件位于左侧机翼与机身整流罩内，紧邻左侧轮舱后方。LSCU同样安装于该舱段。

Turbine Gearbox Assembly

Pneumatic power goes through the MSOV to the TGA.The turbine in the TGA turns the gearbox. The gearbox has a planetary gearset to reduce turbine speed to operate the ADP pump.A pneumatic actuator moves the variable inlet guide vanes (VIGVs) in the TGA assembly. The VIGVs open and close to control the airflow to the turbine. During primary speed control, the VIGVs control the turbine speed. A position indicator shows the VIGV position. A TGA lubrication system cools and lubricates the TGA gears, bearings, and seals. An oil filter cleans the TGA oil. The oil filter has a differential pressure indicator to show the condition of the filter. The heat exchanger on the TGA uses case drain fluid from the ADP pump to cool the TGA oil. There is an oil sight glass and filler port on the front of the TGA.

涡轮齿轮箱组件

气动动力通过MSOV输送至TGA。TGA内的涡轮驱动齿轮箱运转。齿轮箱配备行星齿轮组，用于降低涡轮转速以驱动ADP泵。气作动器控制TGA组件中的可变导叶（VIGV）开闭，从而调节进入涡轮的气流。在主转速控制阶段，VIGVs负责调节涡轮转速。位置指示器可显示VIGV工作状态。TGA润滑系统为齿轮、轴承及密封件提供冷却与润滑。油气滤清器负责净化TGA机油，其差压指示器可显示滤芯状态。TGA上的热交换器利用ADP泵的壳体回油冷却TGA机油。TGA前部设有油视镜和注油口。

General

The ADP assembly gets pressurized air from the airplane pneumatic system. Air flows through the modulating shutoff valve (MSOV) to the turbine gearbox assembly (TGA). The TGA turns the ADP hydraulic pump. The LSCU supplies primary speed control and overspeed protection.

概述

ADP组件从飞机气动系统获取加压空气。空气经调压关断活门（MSOV）流向涡轮齿轮箱组件（TGA）。TGA驱动ADP液压泵运转。LSCU提供主转速控制及超速保护功能。