Third, the advantages of frequency conversion The network frequency conversion transformation of the fine sand machine has the following advantages: 1. Improve product quality: the breakage rate is reduced when the spindle is reduced. The reduction of the broken head can save the time for the cleaning work to reduce many sudden yarn defects and improve the product quality. 2. Increased output: The spinning frame after installing the inverter, although it reduces the speed of 5%-8% in the small yarn and the large yarn (the purpose is to reduce the breakage rate), but increases the 5%-15% according to the condition of the medium yarn. The speed of the medium yarn accounts for 80% of the length of the entire yarn, which increases the overall speed of the spinning by nearly 10%, greatly improves the effective running time of the spindle, and improves the production efficiency and output of the spinning frame. Production has also increased by nearly 10%. 3. Saving raw materials: After the breakage is reduced, the joint return flower is reduced, and the roller flower is also reduced accordingly, that is, the raw materials for rework and waste are saved. 4. Change the process convenience: reduce the labor intensity When changing the variety or adjusting the speed, you don't need to change the belt pulley, you can directly modify the inverter parameters. 5. The special varieties of spinning have good effects: for some spinning yarns with certain difficulty, such as strong crepe, core yarn, hemp cotton and high-grade combing products, the best point in the production process can be selected by shifting, which can maximize the yield. Reduce breaks. 6. Using inverter control can save electricity: (1) The main motor can maximize the reactive power of the motor, make full use of and improve the power factor. The power factor of the spinning machine with the inverter installed is increased from 0.78 to 0.92, reducing the reactive current, reducing the line loss and saving the power. Electrical energy. (2) The working time of the electrical equipment is greatly reduced, thereby achieving the purpose of saving electricity. The spinning machine with the inverter installed has the same output, and the power consumption of the auxiliary electric equipment such as the suction motor, the electricity for lighting, the electricity for air conditioning, and the equipment for return air are also greatly reduced. 7. Saving production cost: The reduction of the yarn breakage is possible for the value of the turner to expand the stands, reduce the use of 10,000 spindles, and save production costs. 8. Reduce the small-line hairiness: It is of potential commercial value to reduce the small-line hairiness by frequency reduction and reduce the hairiness of large, medium and small yarns. 9. Network monitoring: The inverter can be connected with the PLC and the computer LAN to monitor the online production. Table 3 compares the breakage rate and hairiness index before and after the frequency conversion of a sand machine in a factory. Table 3 Comparison table before and after transformation Spinning variety Transformation of the former After the frequency conversion Decapitation rate 3mm hairiness index Decapitation rate 3mm hairiness index small in Big small in Big small in Big small in Big JC40T 39 18 20 4.0 4.8 4.1 10 12 6 3.8 4.1 4.3 JC50W 56 48 51 3.2 4.1 4.2 28 32 43 2.7 4.0 3.0 Obviously, after the frequency conversion transformation, the breakage rate and hairiness index are better than before the transformation. 4. Several types of spinning frame transformation programs provided by Delta 1. Simple transformation plan For the low-cost transformation requirements of customers, we provide a simple transformation plan using the three-speed control of the inverter. In this solution, only the inverter and the proximity switch need to be installed. Install the proximity switch on the spindle as the counting signal, and use the Delta internal counter (terminal TRG) to count, and set the parameters 3-01 and 3-02 corresponding to the variable frequency multi-function output terminals MO1 and MO2 respectively: The set value arrival indication and the set count value arrival indication. At the same time, by converting the length of the yarn corresponding to the count value, the 3-08 set count value and the 3-09 arrival count value are set. However, the yarn is spun to a certain length, and the multi-function output terminals MO1 and MO2 of the inverter operate, and then there are external control lines, switching the variable frequency multi-speed input terminals, controlling the frequency conversion to realize the three different speeds of the small, medium and large spindles, and improving the spinning. Efficiency and quality. 2. Optimize energy efficiency solutions In the actual spinning process, there is no strict limit on the determination of the small, medium and large yarns of the spun yarn, and the yarns are different, and the determined spinning length is also different. The simple scheme does not achieve the speed increase in the spinning process of different yarns. best effect. In the field spinning tension measurement, the tension fluctuation process is a progressive curve process, not a three-step type. In order to give full play to the potential of the equipment, different frequency conversion speeds can be set for different spinning lengths to stabilize tension fluctuations and reduce breakage. Figure 4 By using the R485 communication function of Delta inverter and the communication program of Delta DVP series PLC, it is convenient to change the frequency of frequency conversion in different lengths of yarn to achieve the optimization of output and quality. The basic configuration of this scheme is as follows: DOPAS38 (or TP04) + DVP24ES + VFD110B43P Figure 3 speed setting Bathroom Faucet,Basin Faucet Bathroom,Bathroom Mixer Tap,Wall Mount Mixer Tap kaiping aida sanitary ware technology co.,ltd , https://www.aidafaucets.com
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