TM25LP TM-25LP和TM-200LP执行器

TM-25LP和TM-200LP执行器是电动液压，比例执行器设计用于伍德沃德43027和2301电气控制，并可与适配器直接连接到燃油流量控制阀。他们有一个铝制的外壳与通过硬化的不锈钢内部部件。
在执行器中，力矩电机伺服阀由电动控制器通电，产生压差作用于第二级滑阀的两端，并使其运行。供应压力由滑阀调节，以移动双作用伺服活塞，并提供25毫米(1英寸)的线性输出轴行程。内部机械反馈是标准的。执行器在工厂进行校准，以便在输入电流损失的情况下在最小燃料方向上偏差。
液压油通过电枢和伺服阀外壳之间的预成形填料环从扭矩电机密封，消除了磁性污染物的积累。在液压供应端口提供40 μ m标称/70 μ m绝对过滤器配件，以便在上游过滤器故障的情况下提供保护。

外形图如图2-1所示:

•整体尺寸
•安装孔位
•液压配件尺寸
•输出轴尺寸
液压供应的适当过滤是极其重要的。执行器的电源必须安装金属元件，10µm(标称)滤波器，距离电源端口1m以内。如果安装了Woodward HPU供电系统，从过滤器到执行器的距离并不重要。在工作和连接液压管路时，有必要保持直接区域和设备的清洁，无污垢和污染物。
执行器的安装姿态不影响执行器的性能。
将所有液压管路连接到执行机构。TM-25LP或TM-200LP执行器的供应压力可以来自正排量或离心式泵。伍德沃德建议使用压力开关，以确保在启动前建立正确的供应压力，并在启动后持续保持压力。
作动器输出与燃油系统之间的联动关系正确，对系统的正常运行至关重要。使用尽可能多的25毫米(1英寸)输出行程之间的最小和最大的流量点。
在进行所有电气连接时，使用正确的伍德沃德控制手册。工厂接线图将根据要求提供。在执行器不与伍德沃德电气控制一起使用的应用中，也将根据要求提供电气输入要求。

TM25LP

The TM-25LP and TM-200LP actuators are electric-hydraulic, proportional actuators designed for use with Woodward 43027 and 2301 electric controls and may interface with an adapter directly to a fuel flow control valve. They have an aluminum case with through-hardened stainless steel internal parts.
In the actuator, a torque motor servovalve is energized by the electric control to generate a pressure differential applied to the ends of, and to operate, the second stage spool valve. Supply pressure is regulated by the spool valve to move a double acting servo piston and provide 25 mm (1 inch) of linear output shaft travel. Internal mechanical feedback is standard. The actuator is calibrated at the factory for bias in the minimum fuel direction in the event of a loss of input current.
Hydraulic fluid is sealed from the torque motor by a preformed packing ring between the armature and the servovalve housing, eliminating the accumulation of magnetic contaminants. A 40 µm nominal/70 µm absolute filter fitting is provided at the hydraulic supply port for protection in the event of an upstream filter failure.

See the outline drawing, Figure 2-1, for:
• overall dimensions
• installation hole locations
• hydraulic fitting sizes
• output shaft dimensions
Proper filtration of the hydraulic supply is extremely important. A metal element, 10 µm (nominal) filter must be installed in the supply to the actuator within 1 meter of the supply port. If a Woodward HPU supply system is installed, the distance from the filter to the actuator is not important. It is necessary to keep the immediate area and equipment clean and free of dirt and contaminants while working on and connecting the hydraulic lines.
The attitude in which the actuator is installed does not affect the performance of the actuator.
Connect all hydraulic lines to the actuator. Supply pressure for the TM-25LP or TM-200LP actuator can be from either positive displacement or centrifugal type pumps. Woodward recommends the use of a pressure switch to be sure that correct supply pressure is established before start-up and maintained continually thereafter.
It is very important that the linkage between the actuator output and the fuel system be of correct relationship for proper operation. Use as much of the 25 mm (1 inch) output travel as possible between minimum and maximum flow points.
Use the correct Woodward control manual when making all electrical connections. A plant wiring diagram will be supplied upon request. In applications where the actuator is not used with a Woodward electric control, electrical input requirements will also be supplied upon request.