The instrument speed control system after the transformation The basic starting point of the new instrument speed control system is to separate the opening of the inlet guide vane and the speed increase of the turbine, that is, to keep the original driving stage 07120r/min speed range, completely relying on mechanical speed regulation. The system manually performs a slow speed increase, and then the speed of the turbine air compressor is increased to 8100r/min by the instrument speed control system. Finally, the meter speed control system automatically adjusts the opening degree of the inlet guide vane according to the requirement of the outlet flow rate FQRC1. Keep its range of motion within 25.710. The principle is that when FQRC1.PV changes within the range of 20100 kPa, due to the action of the low-selector UC13014, the signal received by the turbine air compressor mechanical speed control system SC1302 is 2080 kPa, and its speed corresponds to 71208100r/min. The new instrument speed control As shown in the system, the system cancels the 8510r/min speed range of the original design because the turbine air compressor can provide sufficient power for the current flow at this speed. The modified instrument speed control system has been greatly simplified, and the technical requirements for operation have been greatly reduced, increasing the reliability of the system. After the transformation, the speed-adjusting curve of the speed control system is modified. The instrument interlocking system is modified, the bearing temperature interlocking stop function is cancelled, and the alarm function is retained. At the same time, measures should be taken when the bearing temperature alarm occurs, that is, the instrument technician should immediately check the temperature detection system when the alarm occurs, and judge whether the instrument indication is normal. If it is normal, the equipment technician will perform necessary for the unit. Spectrum analysis, etc., and take appropriate measures, while paying close attention to temperature changes, if the temperature continues to rise to the jump value, the operator will do emergency stop treatment. After such a change, there is no occurrence of a bearing temperature false indication jump accident. Cancel the axle vibration interlocking two-selection parking function, and change to the second-choice two interlocking parking, while retaining the shaft vibration alarm function. At the same time as the shaft vibration interlocking function is changed, a corresponding emergency inspection system is established to increase the interlock protection function of the overspeed jump. The original turbo air compressor is equipped with a key phase monitoring system for fault diagnosis and shaft trajectory drawing of the unit. On this basis, a Bentley 3500/50 key phase speed module is added to make it have a speed. Interlock function, when the turbine speed reaches 9360r/min, the interlock stops the flat air compressor. Improve anti-surge protection and limit the minimum opening of the inlet guide vanes. The temperature in winter and summer has a certain influence on the air density. The surge performance curve of the unit is different, and the requirements for the opening of the minimum inlet guide vane are also inconsistent. The author chose a larger value of 78% (corresponding to the inlet guide vane opening of 25.7), to ensure that the unit will not surge in all seasons. The specific implementation method is as shown. Anti-surge inlet guide vane minimum opening and automatic speed control block diagram working principle: In the driving phase, the set value of the hand-held device HC11 is selected at 0, the inlet guide vane HV1052 directly accepts the output signal of FQRC1; after driving normally, then The set value of HC11 is selected at 78%. Due to the action of the high-selector UC1131, the opening degree of HV1052 will maintain a minimum opening of 25.7 or more. When the unit is manually stopped, the set value of HC11 is selected to be 0. When the lock is jumped, this loop has no effect on the safety of the unit. Conclusion This technical transformation was gradually realized between February 2003 and May 2005 after careful analysis and analysis by the author. Practice has proved that the instrument control and interlocking system has been perfected, and there is no recurrence of the unit parking accident caused by the malfunction. The safety and reliability of the unit operation have been greatly improved, and the large unit control system and interlocking system have been greatly improved. The design provides a reference. Atificial/nutritional Rice Process Line Atificial Rice Process Line,Nutritional Rice Process Line,Golden Rice Maker Machine,Artificial Rice Extruder JINAN CFC MACHINERY CO.,LTD , https://www.cfcmachine.com