High production and low consumption is the development trend of rotor spinning machines

â–¡ Shanghai Textile Engineering Society Liu Rongqing Although there are many types of non-traditional spinning, there are several types of rotor spinning, air-jet spinning and friction spinning that have been commercialized so far. Their common feature is that they eliminate the need for roving. With doubled improvement. Since non-traditional spinning can realize large packages and automatic joints, the prospects are very promising with the development of technological and technological innovations.

In recent years, energy consumption has become the third largest consumer of textiles after raw materials and management costs. Compared with ring spinning, rotor spinning reduces the number of roving links to a certain extent, which reduces the employment of enterprises. At the same time, spinning cups also have a tendency to develop towards energy saving. With the introduction of the intelligent driving concept of equipment, the advantages of the provincial people will be further expanded.

The non-traditional spinning currently commercialized includes rotor spinning, air-jet spinning and friction spinning. Their common feature is that they eliminate the roving process. Because the method of twisting the ring and the wire ring is not adopted, the output of the spinning machine has doubled. Since non-traditional spinning can realize large packages and automatic joints, people are optimistic about their prospects as processes and technological innovations develop. In general, the transformation direction of non-traditional spinning is high-speed, high-yield, low-cost, large-volume, short-flow, labor-saving, quality improvement, and variety adaptability. The main technological advancement of rotor spinning machines is embodied in spinning cups, spinning cup bearings, energy-saving suction, and intelligent drives.

Rotor transformation is more conducive to high productivity. Because the shape of the rotor is closely related to the yarn quality, manufacturers often focus their research on the rotor. It is understood that the current major manufacturers of spinning cups are Rieter, Oerlikon Schlafhorst, and Germany Sussen.

The SUESSEN company in Germany has improved the rotor feeding fiber feed plate. The traditional fiber feed plate can swing up and down with the thickness of the feed fiber layer, resulting in changes in the fiber bundle and the opening of the opening roller, and the improved carding board can maintain the fixing of the carding gauge and improve the yarn quality. In addition, the SUESSEN company also added a bypass inside the spinning cup to adjust the impurity removal to achieve precise control of the impurity in the cotton. Specifically, an adjustable air compensation valve was added behind the opening of the opening of the opening roller. The bypass channel, the equipment can adjust the amount of gas according to the difference of raw materials, to control the noil and trash off rate. A quick-discharge gas passage is provided at the outlet of the delivery pipe, and the flow rate of the pipe can be increased by increasing the flow rate of the pipe to ensure that the fiber is accelerated and sufficiently separated to achieve smooth transportation. At the same time, SUESSUN will also make the gooseneck-shaped channel S of the opening of the opening roller shell to ensure smooth running of the fiber and smooth peeling from the opening roller. The above-mentioned arrangement can solve the contradiction between feeding and purging of fibers, reduce breakage, and increase operating efficiency. The bypass valve can also be closed or reduced when spinning 100% of the chemical fiber.

In addition to the improvement of the rotor fiber feed plate and the setting of a waste adjusting bypass inside the rotor, there is a tendency for the rotor bearings to develop in an energy-saving direction. Modern rotors are equipped with non-contact air bearings, which have significant energy savings compared to traditional rotor spinning bearings. Rieter's Aerobenaring bearings use an air buffer created by compressed air to reduce friction between the spinning shaft and the bearing surface. At the same time the air flow keeps the rotor shaft and the rotor clean. The compressed air acts as a buffer around the rotor shaft and produces a cylindrical flat end. There is a precision throttle valve in the bearing that controls the flow of the buffer. The consumption of compressed air is mainly used to reduce the friction and self-cleaning rotor. The life of this Aerobenaring bearing is more than two years. Schlafhorst's magnetic spinning cup positioning device also uses non-contact rotor bearings, two magnetic fields generated by the permanent magnetic ring, so that the rotor to maintain the axial position. The device does not require air bearing air pressure pipes, which can extend the cleaning cycle by 2 to 3 times compared to ordinary bearing rotor cups and shorten the cleaning time. SUESSEN's eccever-clen Yongjie axial rotor bearing is a refueling rotor bearing, it has a simple ball seat, can accurately determine the amount of oil to reduce the waste of oil.

The accuracy of the yarn eliminator yarn clearer in the production process is caused by the change in the length of the sliver fed into the spinning cup. Rieter used high-speed video technology to analyze the process of the splicing system and its accuracy can reach milliseconds. Its patented product, AERopiecing, has a storage device. The yarn is fed into the spinning cup through the extraction tube. Its length can be adjusted. The purpose is to make The twisted yarn is similar to the original yarn in both appearance and strength. When the raw material changes, only the raw material input control board needs to be changed, and normal production can be performed. Specialized joint system CXPS can freely adjust the parameters such as splicing speed, yarn end blowing, sliver introduction rotor, splicing amount, splicing twist and splicing length. These parameters are already stored in the system. Just press the button, XPS can complete the above settings. If you need to fine-tune, you can manually operate the control panel.

Schlafhorst uses a CNC joint system. The joint process is controlled by a separate volume drive and a separate input drive with two digital drives. In numerical control splicing, the parameters such as fiber feeding, sliver re-feeding time, overlapping dwelling time and so on can be accurate to the second level, and even the acceleration and deceleration time of the bobbin can be set together.

With the intensification of market competition, textile companies are increasingly demanding the yarn clearing effect of rotor spinning machines. In general, the clearer eliminates yarn defects such as thick knots, details, and slubs, and can be controlled at the same time. The quality of knots and the elimination of dyed yarns. Rieter's IQplus clearer is a photoclear clearer, which has a faster scanning speed than previous models. The measurement range is from 2.5mm to 6mm, and the scanning quality is not affected by the yarn position per second. It can scan 20,000 times; the photosensitive clearer has 1024 photosensitive dots with a spacing of 7 microns; at the same time, the IQplus clearer has 12 channels, of which 10 are used to measure thick sections and 2 are used to measure details. It sets the clearing parameters through the control panel. The sensor automatically corrects according to the set parameters. The data can be directly read by the sensor through the processor. This sensor simplifies the setting of different fibers, and can also find the optimal setting and resection rate. In addition, the Corolab Q clearer is used for Schlafhorst semi-automatic rotor spinning; the Corolab XQ clearer is used for fully automatic rotor spinning to identify oversized or undersized slivers.

Energy-saving and intelligent driving have become hot spots In recent years, energy consumption has become the third largest consumption of textiles after raw materials and management expenses. It is understood that the wind used by textile companies for spinning processes accounts for about 25% to 40% of the total energy consumption. If the suction vacuum is reduced by 10 mbar, that is, from 95 mbar to 85 mbar, energy consumption can be reduced by 25,000 kW per year.

Rieter's AUTOVac unit uses an impurity filter to maintain a stable vacuum level; it automatically compensates when the negative pressure is reduced, which is different from other devices that require a higher degree of vacuum to cope with losses. Schlafhorst's vacuum regulator, EVA, regulates the vacuum of each rotor in the machine and keeps it constant. In addition, high-precision dragon belts can also reduce the belt pressure. If the belt pressure can be reduced by 15%, the equipment can not only achieve the purpose of energy saving by 10%, but also reduce the wear of the belt.

Compared with ring spinning, rotor spinning reduces the number of roving links to a certain extent, which reduces the company's employment. With the introduction of the concept of intelligent driving of equipment, the advantages of equipment manufacturers will also be further expanded. For example, the Rieter VAR 10 draft can be used to control technical parameters such as drafting, twisting, spinning speed, and winding elongation, via the control panel of the machine, without changing gears, which reduces labor. The intensity saves parking time. Schlafhorst 480 rotor spinning machine equipped with fault identification system EIS can automatically detect doffing, joint failure. The system directs Coromat to approach the spinning position, detects whether the joint is effective, and guides Coromat to the effective working position. At the same time, EIS also implemented a flow doffing, that is, when the fixed length has been reached, but the package size is still within the tolerance range, Coromat does not drop the cylinder; otherwise, when the length of the winding yarn reaches above 95%, Coromat will immediately drop the cylinder. This will reduce the waiting time for doffing and improve the operating efficiency of the equipment.