Improvement and reduction of loom
The world's shuttleless looms are: projectile loom, water jet loom, air jet loom, rapier loom. Their unit energy consumption (calculated by weaving per square meter of cloth) is the lowest of the film shuttle, followed by water spray, and the highest jet and rapier weaving machine. Which type of loom the company purchases can not only use energy consumption as the main indicator. However, textile machinery factories must pay attention to energy-saving technologies when introducing new machines. 2 nozzle energy saving With the wide application of electronic technology in the monitoring and monitoring of looms, various factories have successively introduced new energy-saving technologies and new measures, such as the application of air-jet looms auxiliary nozzle solenoid valves. One solenoid valve is configured by the past 46 auxiliary nozzles, and one solenoid valve is arranged for two auxiliary nozzles five or six years ago. The electric switch box controls the ordered switch of the solenoid valve to achieve the purpose of airflow relay injection. . According to the manufacturer, only this new technology can save 10% 15% of air consumption. The reason why the energy of air jet loom is so high is mainly in the energy consumption of the nozzle. Taking an air jet loom of 190 cm width as an example, the air consumption of a jet loom is 0.55. 6 m 3 min, and 48 air jet looms are equipped with an air compressor of nearly 40 m 3 min. A 40 m 3 min compressed air machine should be equipped with a tens of kilowatts of electric motor. The air compressor is three shifts of continuous operation. If you save 10% and 15% of the energy, you can imagine that the potential for energy conservation is very huge. Generally, the 190 cm air jet loom has 24 26 auxiliary nozzles. In the weft insertion channel, each auxiliary nozzle has a spacing of 70 80 mm. Since 46 auxiliary nozzles are equipped with one solenoid valve, that is, the time of the 46 auxiliary nozzle switches is Same time. This does not save gas consumption. Now there are two auxiliary nozzles of the air jet loom equipped with one solenoid valve, and only two auxiliary nozzles have the same switching time, which creates conditions for saving gas consumption. As the speed of the loom increases and the number of auxiliary sprays per solenoid valve is reduced, the auxiliary nozzle speed is required to be increased. This technology is not promoted without high-performance, high-speed solenoid valves. In addition to the introduction of two nozzles by Picano, Tsudakoma has also introduced this technology on the ZAX-9100 model. The Toyota JAT710 still uses four auxiliary nozzles and is equipped with a dedicated gas tank for the auxiliary nozzle to reduce the energy consumption of the auxiliary nozzle. Because there is friction between the air resistance and the pipe wall in the pipe, especially when the air pressure is relatively high. Therefore, reducing the friction loss in this aspect can also have a certain effect. Various manufacturers have studied the nozzle holes of the auxiliary nozzles very early, such as single holes, porous, inverted cone holes, etc., many of which have been applied in practice, and each of the auxiliary nozzles has advantages in aperture shape. I think that from the point of view of saving air consumption and saving energy, only from nozzles (including main and auxiliary nozzles) and trachea, innovations in this area not only save energy but also improve the quality of weft insertion. The performance and speed of the new air jet loom are now improved, but the unit energy consumption has not increased much. This has to be attributed to the application of nozzle innovation and improvement measures. The energy-saving four auxiliary nozzles are changed to two nozzles. With one solenoid valve control, the solenoid valve is almost doubled, and it is a high-performance, high-speed solenoid valve, and the manufacturing cost is also inevitable. That is to say, since the introduction of 2 auxiliary sprays with one solenoid valve control 5 or 6 years ago, the response to Liao Liao in the future, and Tsudakoma has just launched this new technology for ZAX? Model 9100, this model has not been promoted in China. It is precisely because of this measure that energy saving is huge, and the quality of weft insertion is improved. I believe that other air-jet looms will adopt this new technology sooner or later, and we will wait and see. In addition to the energy consumption of air weft insertion, the energy-saving looms of the beating-up mechanism are also very expensive. The most important is the beating mechanism. There are two types of beating mechanisms: crank-link mechanism and conjugate cam beating, which have advantages and disadvantages. For a while, a wave of contention conjugated cam beating mechanism was smashed. In the past I also believed that conjugate cam beating was the hallmark of a true shuttleless loom. Through more than two decades of the coexistence of these two institutions and the production practices of various varieties of fabrics, the two beating mechanisms meet the requirements of air jet loom. For individual heavy-weight wide fabrics, the use of a conjugate cam beating mechanism does have its outstanding advantages, and the crank-link beating mechanism is slightly lacking in this respect. The two institutions are identical for most products. Otherwise, the two beating mechanisms are not likely to coexist for such a long time. In terms of quantity, the air-jet loom uses an absolute number of crank-link mechanisms instead of other shuttleless looms. The rapier loom evolved from a crank-link beating mechanism to a conjugate wheel beating mechanism. This mechanism has today's high-performance, high-level rapier loom. Another example is the non-combined conjugate cam beating mechanism of the projectile weaving machine. After all, the founder of the conjugate cam beating is the projectile weaving machine. It was adopted in 1956, and the jet and rapier are learning from it. Come. Followed by the opening mechanism. Whether the cam opening or the multi-arm opening is a mechanism that consumes a lot of energy. But the same is the cam opening, and the negative cam consumes slightly less energy than the active cam. Both cam openings have their own advantages and disadvantages, and users should purchase them according to the specific conditions. As for the multi-arm opening, the energy consumption is larger than that of the cam opening. Japan Toyota and Tsudakoma have successively introduced a servo multi-arm with a servo motor that cancels the electromagnet, cam, etc. This is the real electronic dobby, due to it The manufacturing cost is higher or there is no large-scale promotion. Its movement is shortened, the cam mechanism is eliminated, its energy consumption can be much lower than the existing electronic multi-arm, and the adjustment is convenient. It is electronic control. It should be said that this is a high-tech technology, and with the reduction of manufacturing costs, It is expected to be promoted in the near future, and we are looking forward to being able to use this electronic multi-arm to promote it on air jet loom. 4 Air compressor energy saving said that air jet loom can not but mention the air compressor, and now this centralized air supply system is very unsatisfactory, not to mention the lower efficiency of the compressor, and because of the vibration and noise of the air compressor They are relatively large, and the compressor should be installed at a certain distance from the air jet loom workshop, so the energy loss of the pipeline is amazing. Japan's air-jet looms use factories all use small-capacity air compressors. If there is a 48-air-jet looms, the factory uses 4 small-capacity air compressors, 3 of which are normally open and 1 standby, and the standby is not always disabled. And turn the boot in turn. It is installed not far from the loom, and some even in the production hall. From this point of view, energy consumption is definitely lower than ours. Both large capacity and small capacity air compressors have advantages and disadvantages. The air compressor is divided into two types: absolute oil-free and oil-filtered indirect oil-free. Oil-based air compressors are superior to absolute oil-free in terms of operating efficiency, life, and energy consumption. 20 years ago, the use of absolutely oil-free air compressors. In recent years, many users have switched to oil-based air compressors, and their prices are much cheaper than absolute oil-free air compressors. The oil air compressor has been continually explored and improved. First, it has changed the type of lubricating oil. It uses a lubricating oil that can be cleaned and degreased. In case the filter is ineffective, oil spills on the finished cloth and can be processed later. Eliminated in the process of printing and dyeing. In recent years, the purchase of oil-based air compressors has gradually increased, and it shows that there is no big problem in using oil filtration. All air compressor manufacturers produce oil-free screw compressors or filters that become oil-free. There are also shortcomings in oil-based air compressors. Their lubricating oils have a certain life span and must be replaced regularly. At the same time, the oil filter net should also be cleaned or replaced regularly, which also requires a certain amount of expenses. From the perspective of energy conservation, I suggest to try out the oil air compressor and gain experience through practice. As far as I know, in recent years, there are more manufacturers of oil air compressors in Shandong, Zhejiang and other places. I suggest that you can go to these factories to learn. In recent years, various air compressor factories have also introduced electronically controlled variable frequency motors and infinitely variable air compressors. According to the introduction, energy can be saved by about 10%. But the price is about 10% more expensive. Therefore, it is possible to save energy by adjusting the speed of the motor according to the amount of gas consumption to adjust the amount of gas supply. Take 96 air jet looms as an example. Under normal circumstances, the air supply is greater than the air consumption, because there are always several shutdowns of 96 looms. Although there is one air reservoir to adjust the air volume, if the looms are parked more When the air volume of the gas Cylinder is full, the air compressor will stop. After the centrifugal air pressure shutdown, it will take 30 minutes to restart. Therefore, all methods are adopted to stop emptying, so that part of the energy is wasted. This energy-saving air compressor can solve The problem of emptying. However, due to the short launch time and high price, there are not many adopted, and more users will adopt it from the perspective of energy saving. The air compressor with small capacity and multiple units can be used less than the air compressor with large capacity of less machine. If necessary, less than 12 air compressors can be opened to make the air supply volume and air consumption close to balance. However, the small-capacity multi-machine air compressors are less efficient than the single-unit large-capacity air compressors, and their purchase costs are also much higher. As for the small capacity of the multi-machine or the capacity of the Japanese factory, the gas output is 20 25 m 3 min, and the domestic gas output is 45 60 m 3 min. 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