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原文：
  执行单元主要是接收集成运算系统输出的信号，然后转换为气压信号，或直接以电流信号来控制调节阀动作，达到控制/调节的目的。以气动调节阀为例；在执行单元，一般分三个环节：电气转换器、定位器、执行器。在电气转换器环节中，容易引起波动的原因主要有喷嘴/挡板太脏和接线不牢两种。在仪表空气不干净，如仪表空气含油、含微尘等，在喷嘴/挡板处会逐渐积聚，时间长了，积聚的污物太多时，就会影响喷嘴的排气，导致电气转换器输出波动。出现这种情况，只需要及时清洁喷嘴/挡板就可以解决。第二种是接线不牢，从主控送出的数字/模拟信号，通过电气转换器转换为可以被定位器或执行器接受的20－100Kpa标准信号，当电气转换器接线端子接触不好或没有接牢靠时，即使有轻微的振动，都有可能造成电气转换器输出波动，从而引起调节阀波动。 　

“Execution valves caused by fluctuations in unit"是由中国调节阀网提供的国际阀门新闻，译文仅供参考。另外，中国调节阀网还提供 相关产品搜索： CV3000调节阀、 电动调节阀、 执行器和附件、 更多调节阀产品、 调节阀价格等。

译文：
Execution valves caused by fluctuations in unit Execution unit is mainly integrated computing system receives the output signal, and then converted to pressure signals, or directly to the current signal to control the valve action to control / adjustment purposes. The pneumatic control valve, for example; the execution units, generally in three areas: electrical converters, positioners, actuators. Electrical converter in session, likely to cause fluctuations due mainly to the nozzle / baffle dirty and wiring is not strong two. In the instrument air is not clean, such as instrument air oil, including dust, etc., in the nozzle / baffle Department will gradually build up a long time, too much accumulation of dirt will affect the exhaust nozzle, leading to electrical converter output fluctuation. This happens, just in time cleaning nozzle / baffle can be resolved. The second is the connection is not strong, sent from the master digital / analog signal, converted to an electrical converter that can be positioned, or actuator acceptable 20-100Kpa standard signal converter terminals when electrical contact with bad or no then solid, even a slight vibration, electrical conversion may have resulted in output volatility, causing valve fluctuations.

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原文来源：http://www.1tiaojiefa.com/

2011-12-15 06:10

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