lin91957
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 Posted: Thu 13:31, 28 Oct 2010 Post subject: tory burch shoes Servo system and eliminate the pr |
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Servo system and eliminate the production of shock
Stiffness caused by hydraulic cylinder action is not in place due to irregular shocks. 3. Servo system to produce shock hazard if the servo system shock occurred,[link widoczny dla zalogowanych], then the servo valve controlled hydraulic cylinder will be followed by vibration, so as to drive equipment vibration. If it appears to the vibration phenomenon, his equipment will greatly shorten the life cycle, while controlling it, there will be no normal control of the phenomenon. Rolling my plant systems, but also affect the surface quality of strip, so the damage is significant. Figure 3-1 and 3-2 are the pinch of the normal situation in the roll gap and roll pressure is generated in real time curve and the curve of vibration. It is obvious that the pressure has changed dramatically, after the accident occurs, serious damage to the roll surface, while the surface quality of strip also greatly reduced, has also been raised not in place due to the control resulting from the sets of steel reactor accident. , *. du ・. hn_ a 『, I ... -,'''~ Figure 3-1. Plastic _ Figure 3-24. Servo system to prevent and eliminate shock 4.1 is easy to see from the above description, the servo system in the shock after the harm is great, then how to prevent the generation of shock, a shock and later how to eliminate? It is in the maintenance system an important issue. Maintenance on the good from the device, it should be the prevention, elimination of secondary. From the scene of the actual situation, I think that the prevention of shock produced mainly in the following points: 4.1.1 When the servo valve to the useful life, it should be replaced servo valves. Time to do the step response of the servo valve,[link widoczny dla zalogowanych], in peacetime, when the response will be to detect the servo valve spool for wear. If problems are found, it should be the timely replacement of the servo valve. 4.1.2 servo system, the oil on a regular basis for testing, if the oil level is not enough, should be immediately on the hydraulic system to replace the filter to prevent large particles entering the pilot servo valve spool,[link widoczny dla zalogowanych], causing fresh card servo valve caused by vibration. 4.1.3 regular hydraulic cylinder and the transmission mechanism, it was discovered where a card is fresh and timely treatment. To avoid disturbances outside the system arising from shocks. 4.1.4 Regular feedback on the servo valve to check the cable system, prevent external magnetic field, electric field caused by the shock of the feedback system. 4.1.5 Wiring the system regularly be tightened, to avoid contact resistance as loose screws have caused the error or output error feedback caused by vibration. 4.2 So, if there have been shocks servo system, how to handle it? After several summary, I think we should follow in order to troubleshoot and repair: 4.2.1 First, it should be observed when the device moves there is no obvious overshoot, because this is the most easily observed phenomenon. If so, should adjust the gain of the servo system. Adjustment range does not appear to overshoot to the right, of course, have the opportunity to respond to the system should also be tested. This can eliminate the gain resulting inappropriate shocks. 4.2.2 Check if the given feedback circuits have loose screws, if any, for fastening. Can eliminate the signal interference caused by the vibration. 4.2.3 Check the alarm, the alarm if the servo system,[link widoczny dla zalogowanych], look at what is the reason,[link widoczny dla zalogowanych], if the feedback cables, should be promptly replaced. Can eliminate the feedback system to produce the shock. 4.2.4 If there is no alarm, feedback is also normal, we need to do to respond to the servo valve testing, if the test, the test curve jump action, indicating the pilot spool valve or a card, the main strength of the phenomenon, it should replace the servo valve. This can eliminate servo valve system of shock produced by aging. 4.2.5 If the alarm display or the balance of the hydraulic cylinder pressure imbalance causes mechanical vibrations, it is more trouble. Generally speaking, the shock performance of irregular oscillation is sometimes difficult to capture. Need to check on the machinery and equipment, troubleshooting, obviously, need a very long time. 5. Conclusion If the servo system maintenance is good, can greatly improve the device's operating cycle, the servo system, the prevention and elimination of vibration, can improve the life of the servo system, as well as machinery and equipment connected to the hydraulic cylinder. While reducing the time the accident is bound to bring considerable economic benefits rolling system. I plant maintenance every time the servo system is the maintenance of peace, so that prevention-based feedforward control, regular response of the system test. Out of such a basic no-show, the shock before the accident. I plant for the improvement of production and costs to the guarantee. _ Kyu Man! Plastic outfitting References: [1] IHI's servo valve manual. [2] SONYMOO (; servo valve guide. [3] IHI servo system commissioning manual. [4] IHI coiling process guided the company books.
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