电磁恒温器397B030000
一、名称
SOLENOID THERMOSTAT
电磁恒温器
二、件号
397B030000
三、章节号
36-11-36
四、适用机型
A330/A340
五、系统
36 PNEUMATIC
气源
六、安装位置
发动机吊架
七、部件原理
Detailed Description (Refer to Figure 2)
详细描述
(1) Solenoid thermostat mainly consists of a pneumatic connecting union, a Thermostat Body Assy, a Seat Assy, a stick and a Solenoid Assy.
电磁恒温器主要由气动连接接头、恒温器本体组件、阀座组件、阀杆和电磁阀组件组成。
– The pneumatic union has thread characteristics and a dry-lubrication protection treatment that permit full tightening with no risk of seizing.
气动接头具有螺纹特性和干润滑保护处理，可以完全拧紧，没有咬死的风险。
– The thermostat body is made of stainless steel to withstand temperature variations. The mounting tapped hole of the Seat Assy has fine threads to permit a fine adjustment.
恒温器主体由不锈钢制成，可承受温度变化。 阀座组件的安装螺孔带有细螺纹，可进行微调。
– The Seat Assy has an adjusting screw secured into Thermostat Body Assy. A seat equipped with a seal and a stop moves within the bore of the adjusting screw. A spring maintains the seat into contact with the upper end of the stick rod.
阀座组件有一个固定在恒温器主体组件上的调节螺钉。 装有密封件和止动件的阀座在调节螺钉的孔内移动。 弹簧使阀座与作动杆的上端保持接触。
– A mesh at the top of the Seat Assy protects the inside of the thermostat against foreign bodies. A castellated nut permits the locking of the adjusting screw.
阀座组件顶部的网罩可保护恒温器内部不受异物影响。 带螺纹的螺母可以锁紧调节螺钉。
– The Solenoid Assy has a body fitted with a spacer that support an electrical connector. A coil installed in the solenoid body accommodates a core. The coil is mechanically maintained into position in the body to withstand vibrations.
电磁阀组件有一个壳体，上面装有一个支撑电气连接器的垫片。 安装在电磁阀本体内的线圈可容纳一个衔铁芯。 线圈以机械方式固定在机体内，以承受振动。
Operation (Refer to Figure 3)
工作
A. General
概述
(1) Solenoid thermostat continuously senses the temperature of the air delivered downstream the 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 the precooler. It limits the air delivery through the bleed air system by controlling the closing of the Bleed Pressure Regulating Valve pneumatically.
电磁恒温器可持续检测引气系统预冷却器热交换器下游输送的空气温度，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。 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 3)
工作原理
(1) The Solenoid thermostat has the following functions: the overheat function and the electrical closing function
电磁恒温器具有以下功能：过热功能和电气关闭功能
(a) Overheat Function (Refer to Figure 3).
过热功能
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.
如果输气温度上升到预定水平，杆管就会膨胀并导致不胀钢杆移动。 当做阀芯作动的不胀钢杆会导致引气压力调节活门联接管泄漏。 这种泄漏导致引气压力调节活门调节较低的压力。
(b) Electrical Closing Function (Refer to Figure 3).
电气关闭功能
When the coil of the Solenoid Assy is energized through the electrical connector, the core moves up. The clapper under the spring load moves off its seat.This permits the venting of the coupling line and causes the closing of the Bleed Pressure Regulating Valve.
当电磁阀组件的线圈通过电气连接器通电时，铁芯会向上移动。 弹簧负载下的阀芯离开阀座，从而允许联接管路排气，并导致引气压力调节活门关闭。
八、工作参数
九、在飞机系统中的工作原理及互联
Pressure limitation system
压力限定系统
This sub-system includes a bleed pressure regulating valve designated bleed valve associated with a bleed valve control solenoid.
该子系统包括一个与引气活门控制电磁铁相关联的引气压力调节活门，称为引气活门。
This sub-system enables the aircraft systems to be supplied with air under a normal nominal pressure lower than or equal to 48 psig (cruise normal flow). The IP stage bleed air pressure (or HP stage pressure if the HP bleed valve fails in the open position) is limited downstream of the bleed valve.
该子系统使飞机系统能够在正常额定压力低于或等于 48 psig（巡航正常流量）的情况下获得空气供应。 IP 级引气压力（或 HP 级压力，如果 HP 引气活门在打开位置发生故障）受限于引气活门下游。
The bleed valve operates pneumatically in relation with the associated bleed valve control solenoid. The bleed valve control solenoid is connected to the bleed valve by a pneumatic sense line and is installed in the duct downstream of the precooler exchanger. The bleed valve control solenoid controls the bleed valve closure when the valve solenoid is energized by the BMC or by action on the ENG BLEED pushbutton switch or ENG FIRE. The bleed valve control solenoid reduces the bleed valve regulated pressure when the temperature exceeds 235⁰C.In case of overpressure caused by the bleed valve failure, the overpressure valve closes.
引气活门与相关的引气活门控制电磁铁气动操作。 引气活门控制电磁阀通过气动感应管路与引气活门连接，并安装在预冷却器交换器下游的管道中。 当 BMC 或 ENG BLEED 按钮开关或 ENG FIRE 给引气活门电磁铁通电时，引气活门控制电磁铁控制引气活门关闭。 当温度超过 235⁰C 时，引气活门控制电磁阀降低引气活门的调节压力。
Bleed valve control solenoid
引气活门控制电磁阀
(a) Operation
工作
The bleed valve control solenoid ensures the following functions:
引气活门控制电磁铁可确保以下功能：
① Pressure limitation slaving (downstream of the bleed valve) to:
压力限制从属（引气活门下游）至：
– the air temperature at the precooler exchanger outlet if the downstream temperature is higher than 235⁰C.This is achieved by decreasing of pressure signal sent to the bleed valve regulator which causes reduction of the bleed valve regulation setting.
– 如果下游温度高于 235⁰C，预冷却器交换器出口处的空气温度将降低。这可通过降低输送至引气活门调节器的压力信号来实现，从而降低引气活门的调节设定值。
② Bleed valve closure.This is achieved by venting the pressure signal sent from the bleed valve regulator by electrical action on the solenoid in case of:
在发生下列情况时，可通过电磁阀上的电气动作对引气活门调节器输送的压力进行放气，从而实现引气活门关闭：
– action on the ENG BLEED pushbutton switch on the AIR control panel(OFF configuration)
– 按下空气控制面板上的 ENG BLEED 按钮开关（关闭配置）。
– action on the ENG FIRE pushbutton switch on the overhead panel
– 按下头顶板上的 ENG FIRE 按钮开关
– BMC control
– BMC 控制
