Electric control pneumatic valve actuator fault characteristics all have what kind of?

You must know the electric regulating pneumatic valve in use at ordinary times when actuator fault happened if he should how to solve, source problem determination. More by electric adjustment of pneumatic valve actuator what do you know? Could be divided into two types: direct stroke and stroke, it is an important and indispensable equipment in the automatic control system, its main task is to adjust the pneumatic valve is proportional to the control signal sent by the converted into linear displacement or angular displacement to drive the pneumatic valve, damper, such as regulating mechanism, to achieve automatic control, and therefore is widely used in electric power, metallurgy, petroleum, chemical industry and other industrial department of automatic control field.
electric regulating pneumatic valve actuator fault analysis
to improve the reliability of actuator as possible to reduce and eliminate the fault, but in fact this kind of failure to make a variety of, mainly due to a component failure, integrated components/form factors in the system, electrical, secondary loop, and the outside factors caused by some fault by adjusting method can solve some failure is due to the use of long time, poor accuracy, need replacement, replacement parts to recover its performance, and some of them are due to the original design, need to improve can be ruled out.


1. Electric control pneumatic valve actuator fault feature
( 1) Debugging phase failure
regulating pneumatic valve electric actuator fault problem is complicated, is characterized by the design, manufacture, installation and management, and many other problems intertwined, common failure has serious leakage, stable speed is difficult to adjust, dirt or oil make the drive mechanism unsmooth or action failure. Some components packing or the wrong spring, seal, some belong to the inappropriate design, component selection, improper, the movement is not smooth, poor positioning accuracy, treat this kind of failure, should be careful, careful processing, exclude them one by one.
( 2) Malfunction early and mid -
after debugging in normal production stages of fault feature is one of the few seals due to damage of assembly quality and the material quality problem in the short term and the oil, in addition to stick in the wall at the same time, the hole wall of burr, sticky sand, impurity and dirt off lead to some components work is not stable, often in the middle of the journey, the best operation of the system elements/components working condition, low failure rate.


（ 3) Running late failure


regulating pneumatic valve electric actuator operation after a period of time, all kinds of parts/components because of difference of working frequency and load conditions, each successively wear parts, paint, fault feature of this stage is position feedback poor contact, positioning accuracy, stability, efficiency is significantly reduced, increasing failure rate. This is should be a comprehensive inspection, replace the failure, comprehensive repair fault, otherwise it will bring a lot of inconvenience to operation personnel, even seriously affect the normal regulation and control of the unit.
2。 Accidental, sudden failure
the electric pneumatic valve fault in time for this kind of accidental mutations, is relatively obvious, the fault zone and causes caused by non-artificial and man-made factors, such as poor contact position feedback devices, brake pads wear and the 'lock', parts damage, coil burned, seal failure, etc.