The knitting machine is responsible for the production of cotton barrel-dyed fabrics and is an important step in manufacturing quality. At the same time, due to the long-term operation of the knitting machine for many years, more and more things have happened to its equipment. Specific manifestations include high energy consumption of machinery and equipment, high failure and parking rates, high maintenance costs, heavy maintenance and repair labor, poor safety factors, especially the failure rate of electrical equipment control technology is very high, Xuzhou Qixing Machinery Co., Ltd. introduced The operation status of the equipment before the renovation is as follows.
- The accuracy and sensitivity of the DC speed regulation system of the knitting machine gradually decrease.
- The slow start rate is sometimes too fast, causing cloth drop, broken needles, and mechanical equipment collision.
- The brushless DC motor is seriously overheated and aged, and the motor rotor is severely damaged. This is because the imported motor cannot be repaired and has reached the point of damage.
- Due to the aging of the discrete components on the controller in the DC speed regulation automatic control system, fires occur more than ten times a year, which seriously affects production safety.
- Maintenance costs are high. It costs RMB 10,000 to import a speed controller, which costs RMB 50,000 per year. It costs 8,000 RMB to import a DC motor and 16,000 RMB per year. Additional maintenance costs 20,000 RMB, and the development trend is increasing day by day.
- The failure rate of electrical equipment is high: electrical equipment failures account for more than 60% of total failures. The downtime of electrical equipment failure accounts for more than 80% of the total downtime, which seriously affects the progress of production targets.
Therefore, if you want to make it look youthful again, it is a better choice to transform the original DC speed control system of the LRB knitting machine into an AC speed control system. After investigation, the knitting machine company decided to use the domestic brand Zhongyuan variable frequency speed regulator with high-cost performance to achieve complete renovation.