341E030000 SOLENOID THERMOSTAT

SOLENOID THERMOSTAT 电磁恒温器

一、名称

SOLENOID THERMOSTAT

电磁恒温器

二、件号

341D010000,341E010000,341E020000,341E030000,341E030000 AMDT A

三、章节号

36-11-43

四、适用机型

A320

五、系统

36-PNEUMATIC

气源

六、安装位置

发动机吊架

七、部件原理

Operation

操作

A. General Operation

基本操作

The solenoid thermostat continuously senses the temperature of the air delivered downstream Precooler Heat Exchanger of the bleed air system and monitors the differential pressure between the upstream side of the Bleed Pressure Regulating Valve and the downstream side of precooler.

电磁恒温器持续感测引气系统预冷却器热交换器下游输送空气的温度，并监控引气压力调节活门上游侧与预冷却器下游侧之间的压差。

It limits the air delivery through the bleed air system by controlling the closing of the Bleed Pressure Regulating Valve pneumatically.

它通过气动控制引气压力调节活门的关闭来限制通过引气系统的空气输送量。

B. Operating Principle (Refer to Figure 5) (Refer to Figure 6)

工作原理（参见图 5）（参见图 6）

The solenoid thermostat covers the following functions:

电磁恒温器具有以下功能：

– The overheat function

– 过热功能

– The non-return function

– 止回功能

– The electrical closing function

– 电气关闭功能

– : the pressure differential limitation (For PNR 341D010000)

– 压差限制 （适用于 PNR 341D010000）

– : the “upstream” pressure limitation (For PNRs 341E010000, 341E020000, 341E030000 and 341E030000 Amdt A).

– 上游 “压力限制 （适用于 PNR 341E010000、341E020000、341E030000 和 341E030000 Amdt A）。

(1) Overheat Function (Refer to Figure 7)

过热功能（参见图 7）

If the temperature of the air delivery rises to a predetermined level, the tube of stick expands and causes the invar rod to move. The invar rod which acts as a clapper causes the Bleed Pressure Regulating Valve coupling line to leak. This leak causes the Bleed Pressure Regulating Valve to regulate a lower pressure.

如果空气温度上升到预定水平，感应管（杆）就会膨胀并导致不膨胀杆移动。作为阀芯功能的不膨胀杆会导致PRV耦合管路漏气。这种泄漏导致PRV调节较低的压力。

(2) Non-return Function (Refer to Figure 8 and Figure 9)

止回功能（参见图 8 和图 9）

If the pressure differential, sensed by Diaphragm S-A between the air supply downstream precooler and that upstream bleed pressure regulating valve, drops below a predetermined value due to a reverse flow causing a sudden increase in pressure downstream the bleed air system, Diaphragm S-A is caused to move by spring .

如果由于反向流动造成引气系统下游压力突然升高，导致预冷却器下游和PRV上游之间的膜片组件感应到的压力差降至预定值以下，膜片组件将在弹簧的作用下移动。

The air pressure is thus admitted into the solenoid chamber, causing core and in turn springloaded Clapper S-A to move up and vent the pressure from the Bleed Pressure Regulating Valve coupling line, which in turn is caused to close.

空气压力由此进入电磁阀腔，使铁芯移动，并进而使弹簧加载的阀芯组件上移，将压力从PRV耦合管路中排出，从而使PRV关闭。

(3) Electrical Closing Function (Refer to Figure 10)

电气闭合功能（参见图 10）

When coil of Solenoid S-A is energized by means of electrical connector , core moves up and, because of spring load, enables Clapper S-A to leave its seat and thus to vent the coupling line, causing the Bleed Pressure Regulating Valve to close.

当电磁阀组件的线圈通过电气连接器通电时，铁芯上移，在弹簧的作用下，阀芯组件离开阀座，从而对耦合管路进行排气，导致PRV关闭。

(4) Differential Pressure Limitation (Refer to Figure 8 and Figure 11)

压差限制（参见图 8 和图 11）

NOTE: This function is applicable to (PNR 341D010000)

注： 该功能适用于 (PNR 341D010000)

The Regulator S-A limits the pressure differential between the pressure prevailing on both sides of the Diaphragm S-A.

调压器组件限制膜片组件两侧的压差。

This function is covered as follows:

该功能的适用范围如下：

(a) Rise in the pressure downstream Precooler Heat Exchanger

预冷却器热交换器下游压力上升

Pressure which moves up the Diaphragm S-A causes clapper (A) to open. This pressure which is ducted to the other side of the Diaphragm S-A tends to balance pressures on both sides of the Diaphragm S-A.

向上移动膜片组件的压力导致阀芯 (A) 打开。通过管道连接到膜片组件的另一侧压力用来平衡膜片组件两侧的压力。

(b) Rise in the pressure upstream Bleed Pressure Regulating Valve

PRV上游压力上升

The upstream pressure causes clapper (B) to open.

上游压力使阀芯 (B) 打开。

It is ducted to the other side of the Diaphragm S-A and discharged downstream precooler, thus relieving the differential pressure on the two sides of the Diaphragm S-A.

它被连接至膜片组件的另一侧，并排到下游预冷器处，从而减轻了膜片组件两侧的压差。

(5) Upstream Pressure Limitation (Refer to Figure 6)

上游压力限制（参见图 6）

For PNRs 341E010000, 341E020000, 341E030000 and 341E030000 Amdt A

适用于 PNR 341E010000、341E020000、341E030000 和 341E030000 Amdt A

If the bleed pressure regulating valve upstream pressure becomes excessive, safety valve relieves the Diaphragm S-A by venting this pressure.

如果PRV上游压力过高，安全阀将通过排放该压力来缓解膜片组件。

八、工作参数

九、在飞机系统中的工作原理及互联

控制PRV

General Description

The solenoid thermostat is installed in the pressure control and limitation section of the engine air bleed system. It causes the former to close to limit the pressure delivered by the air bleed system.

基本描述

电磁恒温器安装在发动机引气系统的压力控制和限制部分。它使前部关闭，以限制引气系统提供的压力。

This system is installed in the nacelle and pylon of each engine and includes:

该系统安装在每台发动机的短舱和吊架上，包括

– an Intermediate Pressure Bleed Check (IPC) Valve,

– 中压级单向活门 (IPCV)、

– a High Pressure Bleed Valve (HPV) which is contolled by a solenoid (Chapter 71).

– 高压引气活门 (HPV)，由电磁阀控制（第 71 章）。

– a Pressure Regulator Bleed Valve (PRV) which permits or stops the bleed air supply. It also keeps the downstream pressure to a specified limit with a Bleed Pressure Regulated Valve Control Solenoid ,

– 压力调节活门 (PRV)，用于允许或停止引气供应。它还通过引气调节活门控制电磁恒温器（341E）将下游压力保持在规定的限度内、

– an Over-Pressure Valve (OPV) which protects the downstream pneumatic system if the PRV does not operate,

– 超压活门 (OPV)，在 PRV 不工作时保护下游气动系统、

– a bleed air precooler exchanger (air-to-air) which controls the air temperature downstream of the system. The engine fan supplies cooling air through a Fan Air Valve (FAV) to the precooler. A Fan-Air Valve Control Thermostat installed downstream of the precooler controls the butterfly plate of the FAV,

– 引气预冷交换器（空气-空气），用于控制下游气动系统的空气温度。发动机风扇通过风扇空气活门 (FAV) 向预冷却器提供冷却空气。安装在预冷却器下游的风扇空气活门控制恒温器可控制风扇空气阀的蝶板、

– an Exchanger Outlet Temperature Sensor which monitors the temperature in the ducts,

– 一个换热器出口温度传感器，用于监测管道内的温度、

– two presssure transducers which monitor the pressure in the ducts,

– 两个压力传感器，用于监测管道内的压力、

– two Bleed-air Monitoring Computers (BMC1 and BMC2) which receive information from the sensors. They monitor the system and control its operation,

– 两台从传感器接收信息的引气监控计算机（BMC1 和 BMC2）。它们监控系统并控制其运行、

– two temperature sensors which detect overtemperature in ducts and give temperature indication.

– 两个温度传感器，用于检测管道中的过高温度并提供温度指示。

ENGINE BLEED AIR SUPPLY SYSTEM – DESCRIPTION AND OPERATION

发动机引气供给系统-描述和操作

1 . General

概述

The purpose of the engine bleed air supply system is to:

– select one of the two different compressor stages of the engine HP compressor in agreement with the supplied pressure

– regulate the bleed air pressure in order to prevent too high pressures

– regulate the bleed air temperature in order to prevent too high temperatures.

发动机引气供给系统用于：

-根据所提供的压力，选择发动机HP压缩机的两个不同压缩机级中的一个

-调节引气压力，以防止压力过高

-调节引气温度，以防止温度过高。

The bleed pressure regulator valve is installed in the duct downstream of the IP bleed check valve and the HP bleed valve . The bleed pressure regulator valve also operates pneumatically but opening and closing can be controlled by a bleed pressure regulator valve control solenoid (10HA). The solenoid is installed in the duct downstream of the bleed air precooler exchanger (7150HM). The solenoid controls the bleed pressure regulator valve which controls the HP bleed valve at the same time.

PRV安装在IPCV和HPV下游的管道中。PRV通过气动方式操作，但其打开和关闭由一个控制电磁阀（10HA）控制。该电磁阀安装在引气空气预冷器换热器（7150HM）下游的管道中，用于控制PRV，同时该PRV也控制HPV。

Bleed Pressure Regulator Valve Control Solenoid

PRV控制电磁恒温器

(1) The bleed pressure regulator valve control solenoid is installed downstream of the precooler exchanger to control the bleed pressure regulator valve. It includes :

– a thermostat body assy

– a solenoid sub-assembly

– a non-return sub-assembly

(1)PRV控制电磁恒温器安装在预冷器换热器下游，用于控制PRV。其组成部分包括：

-恒温器主体组件

-电磁阀子组件

-止回子组件

(2) Function

功能

(a) Temperature Limitation

温度限制

When the temperature downstream of bleed air precooler exchanger increases and reaches 235 deg.C (455 deg.F), the INVAR rod in the sensing tube starts to open the rod valve by differential dilatation. This cause a modification of the butterfly position of the bleed pressure regulator valve which tends to close to reduce the downstream pressure . If the temperature increases up to 245 deg.C (473 deg.F) the rod valve will be full open and the bleed pressure limited to 17.5 psig.

当预冷交换器下游的温度升高并达到 235 ℃（455 ℉）时，感应管中的 INVAR 杆（不胀钢杆）开始通过差分扩张打开杆阀。这将改变PRV的蝶形位置，使其趋于关闭以降低下游压力。如果温度上升到 245 ℃（473 ℉），杆阀将全开，引气压力限制在 17.5 psig。

(b) Closure of bleed pressure regulator valve

PRV的关闭

When the solenoid is energized, its valve moves away from its seal and vents the bleed pressure regulator valve which closes. When the solenoid is not energized, the solenoid valve is spring-loaded closed.

当电磁阀通电时，其阀离开密封位，使PRV放气并关闭。电磁阀未通电时，电磁阀由弹簧加载关闭。

NOTE : The Bleed Pressure Regulator Valve Control Solenoid has no direct effect on the HP Bleed Valve (HPV) operation. The HP Bleed Valve would also close because the Bleed Valve (PRV) closure would vent to ambient the signal pressure in the sense line between the Bleed Valve and the HP Bleed Valve.

注：控制恒温器对HPV的操作没有直接影响。因为PRV关闭会将PRV和HPV之间感应管路中的信号压力排放至环境中,此时HPV也会关闭。

(c) Non-return function

止回功能

The regulator diaphragm detects a differential pressure between downstream precooler exchanger and upstream pressure regulator valve.

调节器膜片检测预冷却器交换器下游和PRV上游之间的压差。

When the difference between upstream and downstream pressure (Delta P) is lower than or equal to 10 mba, the diaphragm moves and opens the solenoid valve, causing the closure of the bleed pressure regulator valve.

当上下游压差（Delta P）低于或等于 10 mba时，膜片移动并打开电磁阀，从而导致PRV关闭。