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The Effective Application Of Universal Spanducer Achieves A High Additional Spanformation.

2013/3/30 14:13:00 38

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Universal Spanducer Textile Machinery Textile Machinery Enterprise

in recent years, with the continuous improvement of a href= "http://www.91se91.com/news/" > textile machinery < /a >, the level of mechanical and electrical integration technology and the characteristics of the textile industry, the requirements for textiles have been constantly updated. On the basis of many reasons, higher requirements for textile equipment have been put forward. In recent 10 years, in the fierce market competition, the spinning machine manufacturers at home and abroad use PLC control, frequency conversion speed regulation, mechatronics, etc. to replace the traditional mechanical structure with electronic technology, improve the reliability, spinning quality and automation degree of the whole spinning machine, expand the adaptability of the varieties, and make the operation easy. Textile manufacturers also invest in upgrading old equipment. AC variable frequency speed regulation technology is used more technology. In most newly developed textile machinery products, almost no frequency converter is applied. 
 1, the characteristics of AC frequency conversion speed control 1, reduce power consumption and reduce costs. Textile mills can not do without air-conditioning equipment. When the air-conditioner motor is controlled by frequency converter, it can stepless speed regulation according to the workshop environment conditions and expand the scope of regulation. Because most of the fan works in the efficiency of 50-80%, it has good electricity saving effect, up to 60%. In the application of pump control, the speed of water supply pump can be adjusted according to the water volume, so as to realize energy saving and achieve near constant pressure water supply. The frequency conversion speed regulation of the above two main energy consuming equipment reduces the power consumption and greatly saves the electricity consumption. Universal technology company has tested the usage of one of the customers. The annual air conditioners of 12 units can save more than 24 yuan, and the electricity consumption per unit of air conditioning has decreased by 6 and 7 percentage points, respectively. 
 2, which simplifies the mechanism and improves the performance through the control of PLC programmable controller or IPC, and then realizes the synchronous and coordinated operation of the multi motors through the frequency converter. The motion of each mechanism is controlled according to the production process curve, and the mechanism is simplified. For example, the roving machine uses variable frequency speed regulation and removes the cone wheel gear shifting mechanism, thus overcomes the problem that the speed change of the cone wheel is not accurate. 
 and for the < a href= "http://www.91se91.com/news/index_c.asp" > spinning frame < /a >, because of the use of the inverter to remove the forming cam in the forming mechanism, the phenomenon that the peach bottom is stopped and the peach top is impacted is overcome by the forming cam. The shape of the spinning coil is good. So as to facilitate the next process of high-speed rewinding. At the same time, the frequency of the thirty-nine main motors is controlled by the frequency converter to control the revolution of the spindle, so that the spinning speed of the spinning yarn is changed when the middle and small yarns are changed, and the breakage rate of the yarn is reduced. 
 AC variable frequency speed regulation technology has been widely used in new domestic cotton textile equipment. There are few applications of cotton textile equipment currently in service. Most of the equipment used in cotton textile enterprises is produced in seven and 80s. These equipments can still be used for quite some time from the mechanical state. It is impossible to update all of them in the near future, but it is completely feasible to reconstruct some electric drives. 
 take the two processes of carding and roving to carry out the spanformation of frequency conversion technology as an example. A cotton spinning enterprise with a scale of 50 thousand spindles is equipped with 80 or so equipment in the carding process, and 20 or so equipment in the roving process. If the carding machine is 186D or A186F, the retrofit cost of A will be about 280 thousand yuan, but the electromagnetic clutch, 2 contactors, and intermediate relay and rectifier are eliminated during the spanformation of frequency conversion technology. These electrical materials save nearly 1000 yuan, it effectively protects the doffer motor and the doffer spanmission gear train, reduces the failure rate and reduces the maintenance cost, so that each unit saves material costs by 1200 yuan, and 80 sets can save 96 thousand yuan. By simple calculation, the payback period is 4.35 years, and the total return on investment is 22.97%. .
 two, the application of AC frequency conversion technology, the AC motor controlled by frequency converter is mainly divided into two types: one is the commonly used Y series AC asynchronous motor. The motor is mainly applied to the spinning machine with low speed accuracy and small speed range, while the other one is special induction motor with AC variable frequency speed regulation, which is mainly used for machine with high speed precision and wide speed range. ".
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 the following is the introduction of different frequency converters applied to textile machinery. 
 1, PI168 series inverter: using inverter to open loop control asynchronous motor speed regulation is called V/F form. The circuit is simple and reliable. But the speed range is within the range of 10:1, the speed accuracy is lower 2%~5%, and the low speed performance is not ideal. Therefore, it is mostly used for knitting machines or textile machinery which is not very demanding. 
 2, PI7000 series high performance inverter: using speed sensorless vector control inverter. It has excellent low speed characteristics. The circuit has simple structure and high reliability. At the same time, it also has better addition and subtraction characteristics, torque characteristics and current limiting characteristics. The speed accuracy can reach 0.5%~1.0%., and the speed range is within 20:1. Suitable for speed regulation of printing and dyeing machinery. 
 3, PI7000S frequency converter uses vector variable frequency control asynchronous motor with speed feedback, closed loop frequency conversion speed regulation, speed range can reach 100:1., high frequency response, high precision and intelligentization can be realized. It is suitable for high speed, constant tension and constant line speed warping machine, sizing machine, heat setting machine and chemical filament spinning equipment. 
 three, application of frequency converter in textile machinery. Frequency converter applied to spinning machinery, it can be said that almost all processes of mechanical applications. It includes opener, carding machine, winding machine, comber, drawing frame, roving frame, spinning frame and screw machine. For weaving machines, there are sizing machines, warping machines, etc. In addition, knitting machines, non-woven fabrics, chemical fiber machinery, printing and dyeing machinery are also widely used in frequency converters. 
 1, the bobbin winding of roving frame roving machine and the speed of the front roller are easy to be different when opening and stopping, resulting in too large and too small tension of roving yarn, which makes it easy to form coarse and fine sections of roving. In order to reduce the occurrence of coarse details, the roving machine is equipped with a reactor, a time relay and an electromagnetic clutch, and is collectively referred to as a detail protection device. The function of the reactor is to make the main motor in three phase unbalanced state when the roving machine starts, so as to reduce the starting torque of the motor and achieve the purpose of soft start. The time relay and the electromagnetic clutch are separated from the bobbin when the roving machine stops, the bobbin is stopped winding, and the front roller continues to output roving, and the roving with the flyer between the roller and the flyer is also relaxed, so as to prevent excessive tension of the roving when driving again. 
 there are serious defects in the actual use process of this kind of detail protection device. The first is the phase of the reactor string in the three-phase circuit, and the starting torque of the motor is reduced by using the three-phase unbalanced principle. When the roving machine starts up, the reactor is short circuited by the time relay, so that the motor can restore the three-phase balance state and put into normal operation. If there is a problem with the time relay, it will cause the motor to run in three-phase unbalanced operation for a long time, causing the motor to overheat and burn out. The two is that the departure time of the electromagnetic clutch for parking is realized by two time relay coordination, which makes the roving relaxation degree difficult to master, and the malfunction of the electromagnetic clutch is also high; therefore, this anti detail device can be kept very little in the actual production, and the problem of the roving anti details has not been well solved. At present, the spanformation of the new roving machine and the old machine adopts the AC frequency conversion technology. This technological problem can be solved. After testing the yarn quality before and after the modification of the FA491 roving frame, the roving yarn CV% of the start-up section decreased by 2-3% and the coarse roving details decreased by more than 90%. ".
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 FA491 high speed roving frame is a new roving machine developed in China in recent years. Using industrial control computer, PLC and frequency converter to control 4 motors, rotating flyers, rollers, simple pipes and dragons, respectively, to remove the cone wheel spanmission and forming device, and simplify the mechanism. High efficiency, high reliability, low noise, easy operation and maintenance. Process adaptability is good, reduce broken ends. The highest speed can be up to 1500rpm, and new technologies such as man-machine conversation, parking and automatic location are realized. It is a high level roving machine. 
 2, sizing machine frequency control in the sizing machine application, reducing the mechanical structure and motor. In the spanformation of G142 series sizing machine, AC variable frequency speed regulation is adopted to reduce the first group of mechanical continuously variable spanmission in the original design, and at the same time, a servo motor and a slow motor are omitted. In meeting the sizing process, the speed of the car is changed from slow speed, main engine plus speed up and speed to no break stepless speed regulation of the starting speed of the starting process, which provides a condition for adjusting the pressure of the speed change and achieving the sizing ratio of sizing. 
 GA308 sizing machine is AC distributed drive. Among them, the sizing tank, the lower pulp tank and the drying cylinder are driven by an AC variable frequency motor, while the weaving shaft and the traction roller are driven separately by an AC servo variable frequency motor. 5 spanducers, 2 servo controllers and sensors for pressure, temperature and moisture regain are applied. It is controlled by IPC and PLC PLC. A distributed control system is formed. PLC is used to control the whole machine and the parameters such as moisture regain, drying room and temperature of the pulp tank and pressure of the press roller. The whole machine is controlled by IPC. This machine has high control precision, stable performance and low failure rate. It is a high quality and high level equipment. 
 3, in the spinning process of cotton spinning equipment, the electrical drive of the processing equipment is stable, and the movement, starting and speed up should be smoothed to achieve uniform drafting, reducing the weight and the CV value of the yarn. In the spanmission system of cotton spinning equipment, it is borne by belts and gears. Because of the hardness of the motor, there will inevitably be belt slip and gear impact during the starting and starting process. In mechanical spanmission gear, the more gear, the greater the probability of gear damage. The application of AC frequency conversion technology can well solve the smooth start, eliminate the impact force during mechanical start-up, achieve stepless speed regulation, meet the production process requirements, and improve the yarn quality. When this technology is used to change the varieties of cotton yarns, it is not necessary to change the teeth or pulleys. The change of the process speed of the equipment can only be accomplished by setting the frequency conversion. 
 the old machine of carding machine inevitably suffers from some defects due to the constraints of the technical conditions, equipment manufacturing cost and market demand. For example, the electromagnetic clutch in the A186D carding machine drive system often causes a shutdown because of its high failure. From time to time, a fire alarm can cause certain losses to the production efficiency and product quality. It is necessary to invest a lot of manpower and material resources to maintain and maintain. In some enterprises, the electromagnetic clutch of inertia wheel is abandoned. In this way, when the doffer moves slowly, it produces fine sliver, serious breaking edges, and the breaking of the cotton web affects the quality of the sliver. In order to avoid this phenomenon, some enterprises make use of improper operation methods to make up for the defects of the above equipment, but it is equally undesirable to create a large number of waste strips. ".
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 improving the running state of carding machine. A186D carding machine in order to make doffer reach up and down smoothly, in the mechanical spanmission design of dual speed motor, inertia wheel, electromagnetic clutch, electrical and mechanical means to achieve. In the design of A186E, A186F and FA201 carding machine, the control of the star delta conversion of the motor is added, which further improves the slope of the ascending and descending speed. The FA201B and FA212 carding machine adopts AC frequency conversion speed regulation, so as to realize arbitrary adjustment of the doffer speed slope and the arbitrary variable function of the dart process speed. It provides a good example for old machine spanformation. 
 to carry out AC frequency conversion speed regulation for A186D old machine, not only improve the performance of the equipment, but also reduce the failure to stop the platform. It also improves production efficiency and quality of sliver. 
The application of P frequency conversion technology in textile equipment is necessary. It is also feasible for the popularization and application of traditional textile equipment. 
 the process of internationalization of China's textile industry is accelerating. However, in order to narrow the gap, we should constantly improve the level of mechanical and electrical integration of textile machinery, and better use the AC frequency conversion technology in the control of textile machinery. We must constantly develop high-quality, high level inverter and AC servo motor controller with our own intellectual property rights, and actively promote the intelligent technology, fieldbus technology, realize network control, and achieve man-machine conversation through digital display instrument and touch screen. 
 application status of mechanical automation textile technology 
 Schneider electric and OMRON automation (China) Co., Ltd., and other famous companies, invited SIEMENS (China) Limited, each of them introduced the electrical automation system, including special controller, multi spanmission system, proposed optimization solutions, field bus and interface in textile machinery products (spinning, needling, knitting, weaving, dyeing and chemical fiber) the latest concrete application examples, for delegates to know and discuss. 
 conference submitted "< a href=" http://www.91se91.com > > textile equipment < /a > development status of manufacturing industry and development trend of textile machinery "and" ITMA2007 ITMA2007 textile machinery automation evolution trend - thinking about the future of Chinese textile machinery "two reports and product samples for reference to delegates attending the conference, and organized a visit to Schneider Electric's frequency converter production plant in Suzhou development zone.
Wang Yanzeng, Vice Minister of Limited by Share Ltd, Yuci branch of Jingwei Textile Machinery Co., Ltd. and general manager of Beijing Ren Ren Zhijie Technology Development Co., Ltd., delivered a speech on the experience, experience and key points of electrical system design of electrical automation technology on comber and spinning frame. 
 the marketing department of the China Textile machinery and Equipment Association held a seminar on the application and popularization of textile machinery automation technology in Suzhou, Jiangsu on 19-21 May 2008. A total of 40 people from 26 units participated. Electrical enterprises and textile machinery enterprises have discussed the application prospects of electrical new products on textile machinery. The meeting also carried out interactive exchanges between groups to understand the concerns and requirements of all parties in the technological progress of textile machinery products, advocate personalized and customized products, protect intellectual property rights of specialized technology, and achieve long-term cooperation and win-win development. 
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