技术领域technical field
本发明涉及一种用于将纬纱引入到片梭型织机中的电磁装置。The invention relates to an electromagnetic device for introducing a weft thread into a projectile-type loom.
背景技术Background technique
正如已知的那样，片梭(projectile)织机与其它类型的织机的不同之处在于纬纱通过片梭引入到梭口中，所述片梭即为具有适当质量和形状的锥形金属体，该锥形金属体持握纬纱的端部。As is known, a projectile loom differs from other types of looms in that the weft thread is introduced into the shed by means of a projectile, which is a conical metal body of appropriate mass and shape, The tapered metal body holds the ends of the weft yarns.
在梭口出口处(通常参照织布者的位置，对应于织机的右手侧)，通过制动装置使片梭的速度降低并且使其停止，纬纱被松开并且因此使片梭通过适当的连续传送系统朝织机的投放侧(通常在左手侧)返回。在投放侧，单个进入的片梭被装载到将其逐步带到投放平台前方的装置上，在投放平台处，所述片梭被再次投放到梭口中，从而将另一纬纱带入其中。At the shed exit (usually referring to the weaver's position, corresponding to the right-hand side of the loom), the speed of the gripper is reduced and stopped by a braking device, the weft thread is released and the gripper is thus passed through the appropriate The continuous conveyor system returns towards the launch side (usually on the left hand side) of the loom. On the delivery side, the single incoming gripper is loaded onto a device that brings it progressively in front of the delivery platform, where it is released again into the shed, bringing another weft thread into it.
尽管这类织机具有尤其在编织非常宽的织物方面的可见优势，其存在一些显著缺陷。首先，存在机械性缺陷，这类缺陷与必须施加到片梭的高脉冲推力直接有关。特别地，除了片梭受到的由投放构件施加的脉冲推力所确定的问题之外，还存在设计一种产生足够强但不过大的推力的适当机构的复杂性。Despite the perceived advantages of this type of loom, especially in weaving very wide fabrics, it suffers from some significant drawbacks. First, there are mechanical deficiencies that are directly related to the high pulse thrust that must be applied to the projectile. In particular, besides the problem determined by the pulsed thrust exerted by the delivery member to which the projectile shuttle is subjected, there is the complication of designing an appropriate mechanism to generate a sufficiently strong but not too great thrust.
GB2.003.198公开了一种传统的投放装置，其中旨在牢固地抵接在片梭后端上的投放构件被支撑在由扭力杆驱动的操作杆上，所述扭力杆通过凸轮机构循环加载。GB 2.003.198 discloses a conventional dosing device in which the dosing member, intended to abut firmly against the rear end of the projectile, is supported on an operating rod driven by a torsion bar which is cyclically loaded by a cam mechanism.
正如能够容易地猜想到的那样，就所承受和施加的应力、以及在投放步骤中确定并控制片梭的运动规律的机会而言，利用凸轮加载的扭力杆的系统是较为关键的机械部件。As can be easily guessed, the system utilizing cam-loaded torsion bars is the more critical mechanical component in terms of the stresses experienced and applied, and the opportunity to determine and control the law of motion of the gripper during the delivery step.
实际上，由于片梭以非常高的脉冲加速度被投放通过梭口，并且片梭随后未被任何驱动构件控制，所以在片梭织机中出现一些典型的编织问题，尤其是纬纱具有高初始应力以及片梭沿梭口内的整个行程具有基本不受控的行进状况。特别地，当推力脉冲没有完全对称地发生在片梭上时，片梭轨迹受到侧向振动，该侧向振动由片梭在其中滑动的引导件控制，但这使投放的效率和规则性变差。In practice, some typical weaving problems arise in projectile looms, especially with high initial stresses in the weft yarn, since the projectile is thrown through the shed with a very high pulse acceleration and the projectile is not subsequently controlled by any drive member And the projectile shuttle has substantially uncontrolled travel conditions along the entire stroke in the shed opening. In particular, when the thrust pulses do not occur perfectly symmetrically on the gripper, the gripper track is subjected to lateral vibrations controlled by the guides in which the gripper slides, but this makes the delivery less efficient and regular Difference.
三菱电机(Mitsubishi Electric)的JP-48-44559(1973)公开了一种用于片梭投放的可行替代解决方案，其中片梭不再因机械推力构件达到最大设定投放速度，而是因片梭浸没于其中的电磁场产生在片梭上的加速度而达到最大设定投放速度。特别地，所述电磁场由沿着片梭轨迹依次布置的一个或者两个线圈产生，所述轨迹经过线圈的内部轴向空腔，以便在该轨迹周围产生尽可能平均且平行的磁场。JP-48-44559 (1973) by Mitsubishi Electric discloses a viable alternative solution for projectile delivery in which the projectile is no longer due to a mechanical thrust member to reach the maximum set delivery speed, but instead to the projectile. The electromagnetic field in which the shuttle is immersed creates an acceleration on the projectile to a maximum set delivery speed. In particular, said electromagnetic field is generated by one or two coils arranged one behind the other along the gripper track, said track passing through the inner axial cavity of the coils, so as to generate as uniform and parallel a magnetic field as possible around this track.
尽管迄今为止对上述投放技术的了解已有数十年，但是迄今为止从未将该投放技术投入到实际应用。在发表文章“Usingelectromagnetic force in weft insertion of a loop”(载于Fibres&Textiles in Eastern Europe－2005年7月/9月，Vol.13，No.3(51)－第67-70页)中包含对上述类型的第一代纬纱电磁引入系统的详尽的评论分析，其中，作者S.A.Mirjalili陈述了在Yazd大学(伊朗)的纺织工程系进行的、针对通过电磁装置对铁磁材料制成的片梭进行精确投放的研究的结果。Although the delivery technique described above has been known for decades, it has never been put into practical use until now. In the published article "Using electromagnetic force in weft insertion of a loop" (in Fibers & Textiles in Eastern Europe - July/September 2005, Vol.13, No.3(51) - pp. 67-70) contains a review of the above An exhaustive review analysis of the first generation electromagnetic introduction system for weft yarns of the type, in which the author S.A. Mirjalili presents the work carried out at the Textile Engineering Department of Yazd University (Iran) for the precise introduction of projectiles made of ferromagnetic materials by electromagnetic means. The results of the research delivered.
在该发表文章中，详细论述了当片梭到达线圈的中心位置处并且因此将开始受到由线圈的第二半部分施加的制动作用的影响时，必须切断电磁投放装置的线圈的供应电流。实际上，如果电流稳定地保持在线圈中，那么片梭的稳定平衡位置将精确地对应于线圈的中心位置，在该位置，片梭将在围绕该中心位置进行一系列快速振动之后停止。In this publication, it is discussed in detail that the supply current to the coil of the electromagnetic dosing device must be switched off when the gripper has reached the center position of the coil and will therefore begin to be affected by the braking action exerted by the second half of the coil. In fact, if the current is held steadily in the coil, the stable equilibrium position of the gripper will correspond exactly to the center position of the coil, around which the gripper will stop after a series of rapid oscillations.
基于该发现，并且另一方面为了能够实现片梭的所需离开速度与磁场作用的良好使用效率之间的良好折衷，作者建议片梭的长度等于线圈的长度的75％至125％。Based on this finding, and on the other hand in order to be able to achieve a good compromise between the required exit speed of the gripper and a good efficiency of use of the magnetic field action, the authors recommend that the length of the gripper be equal to 75% to 125% of the length of the coil.
然而，上述研究最后指出，利用这种投放装置不能实现与机械投放的片梭的速度相当的片梭速度。However, the above-mentioned studies finally point out that with this delivery device it is not possible to achieve gripper speeds comparable to those of mechanically delivered grippers.
在Konrad Hilmar的专利公开DE-10 2009 019935中终于公开了一种采用电磁力的更新的引纬装置，该引纬装置包括设置有单个片梭的织机，所述单个片梭因布置在梭口的两个相对端部处的两个类似的电磁装置而被交替地送入到梭口中，所述电磁装置中的每一个均由四个毗邻线圈构成。基于与片梭速度和织机的主运动的角坐标相关的信息，微控制器连续激活所述线圈，以便加速或者相应地制动片梭。没有详细公开发生线圈激活的方式，但是在任何情况下显而易见的是，线圈的激活随片梭前进而相继地发生。In Konrad Hilmar's patent publication DE-10 2009 019935 a newer weft insertion device using electromagnetic force is finally disclosed, which comprises a loom provided with a single gripper which is arranged on the shuttle Two similar electromagnetic devices, each consisting of four adjacent coils, are alternately fed into the shed at two opposite ends of the shed. Based on the information about the projectile speed and the angular coordinates of the main movement of the loom, the microcontroller activates said coils continuously in order to accelerate or correspondingly brake the projectile. The manner in which activation of the coils occurs is not disclosed in detail, but in any case it is evident that activation of the coils occurs sequentially as the gripper advances.
在上述专利公开中，没有具体公开片梭长度与线圈长度之间的比率，但是从附图中显而易见的是，该比率处于上述Mirjalili研究所公开的范围的上方值。In the above patent publication, the ratio between gripper length and loop length is not specifically disclosed, but it is evident from the drawings that this ratio is at an upper value of the range disclosed by the Mirjalili study above.
然而，在实际应用中，上述现有技术所提出的解决方案都没有给出令人满意的结果。实际上，在图1中示意性示出的Mitsubishi解决方案的很大缺陷在于，仅在片梭和线圈之间的相对位置P的较小范围内施加大的吸引力F。尽管线圈比片梭的纵向尺寸大很多，然而可用于加速的空间仍然非常有限，并且考虑到片梭的所需最后投放速度，这意味着非常高的加速度和力。这种加速度和力需要使用高电流，并且导致因线圈中的焦耳效应造成的极大损耗并且因此导致投放系统具有非常低的整体效率，整体效率指的是片梭的动能/用于投放片梭的电能。因此，在该解决方案中还存在严重的线圈冷却问题，此外还出现纬纱具有很大机械应力的问题。However, in practical applications, none of the solutions proposed by the prior art mentioned above give satisfactory results. In fact, a great drawback of the Mitsubishi solution shown schematically in FIG. 1 is that a large attractive force F is only applied within a small range of relative positions P between gripper and coil. Although the coil is much larger than the longitudinal dimension of the gripper, the space available for acceleration is still very limited, and considering the required final delivery speed of the gripper, this implies very high accelerations and forces. Such accelerations and forces require the use of high currents and result in very large losses due to the Joule effect in the coil and thus result in a delivery system with a very low overall efficiency, referring to the kinetic energy of the gripper/used to deploy the gripper of electric energy. Therefore, in this solution there is also a serious problem of coil cooling, in addition to the problem that the weft thread is under great mechanical stress.
在图2中示意性示出的任何进一步的线圈伸长在任何情况中均不会改进这种情况，这是因为一旦片梭本身完全处于线圈内，因上文已经陈述的原因，施加在片梭上的电磁力F将为零。因此，在可用区域中的电磁力相等的情况下，由于在对于片梭加速目的无效的所有其它线圈区段中的焦耳效应，将产生更大的消耗。Any further coil elongation, schematically shown in Figure 2, would in no case improve the situation, since once the gripper itself is fully inside the coil, for the reasons already stated above, the The electromagnetic force F on the shuttle will be zero. Thus, with equal electromagnetic forces in the usable area, greater consumption will result due to the Joule effect in all other coil sections that are ineffective for gripper acceleration purposes.
最后，在Hilmar解决方案中，提出增加线圈数量并且同时将线圈的纵向尺寸减小到明显小于片梭长度的值，以便限制因焦耳效应造成的损耗并且因此提高系统的效率。然而，由这种中等长度的线圈施加的电磁力非常低，并且即使每一个单个线圈的效率均高于先前解决方案的线圈的效率，从目前工业应用的角度看，仍然不能成功地将片梭加速到所需速度。Finally, in the Hilmar solution, it is proposed to increase the number of coils and at the same time reduce the longitudinal dimension of the coils to a value significantly smaller than the length of the gripper, in order to limit the losses due to the Joule effect and thus increase the efficiency of the system. However, the electromagnetic force exerted by such moderately long coils is very low, and even if the efficiency of each individual coil is higher than that of the coils of previous solutions, it is still not possible to successfully integrate the projectile from the point of view of current industrial applications. Accelerate to desired speed.
发明内容Contents of the invention
因此，本发明的目的在于提出一种片梭织机中的用于纬纱的引入的电磁装置，该电磁装置不存在上述缺陷并且因此允许根据需要沿着纵向区域对片梭施加高电磁力，以便实现片梭的所需最终速度，同时不产生系统具有低的电效率和纬纱具有过大机械应变的上述缺陷。It is therefore the object of the present invention to propose an electromagnetic device for the introduction of weft threads in a projectile loom which does not suffer from the above-mentioned disadvantages and thus allows the application of high electromagnetic forces on the projectile along the longitudinal area as required in order to The desired final speed of the gripper is achieved without the above-mentioned disadvantages of low electrical efficiency of the system and excessive mechanical strain of the weft thread.
通过具有独立权利要求1所限定的特征的片梭织机中的电磁引纬装置实现该目的。在从属权利要求中限定了这种引纬装置的其它优选特征。This object is achieved by an electromagnetic weft insertion device in a gripper loom having the features defined in independent claim 1 . Other preferred features of such a weft insertion device are defined in the dependent claims.
附图说明Description of drawings
在任何情况下，通过下文对电磁引纬装置的优选实施例的详细描述，根据本发明的片梭织机中的电磁引纬装置的其它特征和优势将变得更加明显，所述优选实施例仅作为非限制性示例给出并且在附图中示出，附图中：In any case, other features and advantages of the electromagnetic weft insertion device in projectile looms according to the invention will become more apparent from the following detailed description of a preferred embodiment of the electromagnetic weft insertion device, which Given as a non-limiting example only and shown in the accompanying drawings, in which:
图1是示出了在上述Mitsubishi现有技术的引纬装置中，由线圈施加在通过线圈的片梭上的电磁力相对于片梭尖端位置的变化的视图；1 is a view showing changes in electromagnetic force exerted by a coil on a gripper passing through the coil with respect to the position of the tip of the gripper in the Mitsubishi prior art weft insertion device described above;
图2是在线圈的长度远大于片梭的长度的情况下的与图1类似的视图；Figure 2 is a view similar to Figure 1 in the case where the length of the coil is much greater than the length of the gripper;
图3示出了包括分别激活的线圈的装置的操作图，所述线圈比片梭短，例如是在Hilmar专利中描述的线圈；Figure 3 shows a diagram of the operation of a device comprising individually activated coils, shorter than the gripper, such as those described in the Hilmar patent;
图4示出了根据本发明的电磁引纬装置的操作图；Fig. 4 shows the operation diagram of the electromagnetic weft insertion device according to the present invention;
图5示出了图4的电磁引纬装置的不同实施例，所述电磁引纬装置设置有对片梭位置的更为完备的控制。Fig. 5 shows a different embodiment of the electromagnetic weft insertion device of Fig. 4 provided with a more complete control of the gripper position.
具体实施方式detailed description
为了更好地理解本发明，在图1至图3的视图中，示意性示出了由传统类型的电磁引纬装置施加在片梭上电磁力F相对于片梭尖端位置P的曲线，传统类型的电磁引纬装置例如是文献Mitsubishi、具有进一步伸长的线圈的Mitsubishi和Hilmar所公开的电磁引纬装置。为了进一步简化，附图中仅示出了力F的正分量，这是因为如在Mirjalili文献中所描述的那样，显然，在片梭超过相对于线圈的中心位置后的行进中，如果不切断线圈的电力供应，那么将产生符号相反但是趋势相同的电磁力。In order to better understand the present invention, in the view of Fig. 1 to Fig. 3, the curve of the electromagnetic force F exerted on the gripper by a conventional type electromagnetic weft insertion device relative to the position P of the gripper tip is schematically shown, the traditional Electromagnetic weft insertion devices of this type are for example those disclosed by the documents Mitsubishi, Mitsubishi and Hilmar with further elongated coils. For further simplification, only the positive component of the force F is shown in the figures, because, as described in the Mirjalili document, it is clear that in the travel of the projectile beyond the center position relative to the coil, if the If the coil is supplied with electricity, then an electromagnetic force of opposite sign but with the same trend will be generated.
在图1的下部，片梭1示出为处于线圈2前方的等待位置。当激活线圈时，线圈在片梭上产生根据片梭随后所在位置P而变化的电磁力F(如在图1的上部示意性示出的)，电磁力的变化涉及从开始位置到片梭尖端到达对应于线圈进入区域的位置的快速增加、随后为一段较为有限范围内的最大值、以及此后突然的下降直到当片梭尖端位于线圈2的离开区域附近时恢复成零。In the lower part of FIG. 1 , the gripper 1 is shown in a waiting position in front of the coil 2 . When the coil is activated, it generates on the gripper an electromagnetic force F (as shown schematically in the upper part of Fig. A rapid increase to a position corresponding to the coil entry zone, followed by a maximum over a relatively limited range, followed by a sudden drop until returning to zero when the gripper tip is near the coil 2 exit zone.
正如在上文中已经描述的，当评论S.A.Mirjalili的发表文章时，这种线圈布置方案因而仅在片梭和线圈之间的相对位置的有限范围内、即在实践中仅在线圈长度的第一部分中允许施加很大的吸引力。这种情况导致产生上文已经描述的显著缺陷。As already described above, when commenting on the published article by S.A. Mirjalili, this coil arrangement is thus only within a limited range of the relative position between gripper and coil, i.e. in practice only over the first part of the coil length A large force of attraction is allowed in . This situation leads to the significant disadvantages already described above.
使用如图2所示的具有更大长度的线圈2不改变上述电磁力F曲线在初始升高和最大峰值部分中的形状，而是仅拉长了曲线的下降部分，在该区域中，电磁力仍然具有很小的值并且最终为零(当片梭完全位于线圈内时)；因此，该解决方案会导致系统效率的大程度恶化。Using a coil 2 with a larger length as shown in Figure 2 does not change the shape of the above-mentioned electromagnetic force F curve in the initial rise and maximum peak part, but only elongates the descending part of the curve, in this region, the electromagnetic force F The force still has a small value and eventually goes to zero (when the gripper is completely inside the coil); thus, this solution leads to a large deterioration of the efficiency of the system.
相反，如在更新的Hilmar文献中提出并且如图3所示的那样，使用具有较短长度的线圈或者一系列线圈2虽然确保装置具有更大的效率，但是会成比例地降低电磁力F的最大峰值，因此不允许在能够用于织机机载的这类装置的较为有限的空间中达到片梭1的所需投放速度。Conversely, using a coil or series of coils 2 with a shorter length, as proposed in the updated Hilmar document and shown in Figure 3, while ensuring a greater efficiency of the device, proportionally reduces the magnitude of the electromagnetic force F The maximum peak value therefore does not allow to achieve the required delivery speed of the gripper 1 in the relatively limited space available for such devices on-board a loom.
在这种技术现状中，在图4中示意性示出的本发明所提出的解决方案提供使用多个线圈3，所述多个线圈沿着片梭的投放轨迹相继地布置成串，这些线圈中的每一个均具有优选地为最优线圈的长度的整约数1/n的长度，所述最优线圈在静止状态下允许在某个片梭1上获得所需电磁力，从而使所述线圈中因焦耳效应造成的功率损耗最小化。上述最优线圈的长度的范围在片梭的铁磁有效长度(active length)的30％至70％之间，优选地在片梭的铁磁有效长度的40％至60％之间，更优选地等于该长度的一半。约数1/n(该约数的值确定单个线圈3的长度)能够根据构造和经济参数而被优化，在n的值的范围例如在2至10之间、优选地在3至6之间的域中，这导致线圈3的长度因而明显小于片梭1的长度。In this state of the art, the solution proposed by the invention, shown schematically in FIG. Each of them has a length which is preferably an integral submultiple 1/n of the length of the optimum coil which, in the rest state, allows the desired electromagnetic force to be obtained on a certain gripper 1 such that all Power losses due to the Joule effect in the coils are minimized. The above-mentioned optimum coil length ranges between 30% and 70% of the ferromagnetic active length of the gripper, preferably between 40% and 60% of the ferromagnetic active length of the gripper, more preferably equal to half that length. The submultiple 1/n, the value of which determines the length of the individual coils 3, can be optimized according to constructional and economical parameters, where the value of n ranges for example between 2 and 10, preferably between 3 and 6 In the domain of , this results in a length of the coil 3 that is thus significantly smaller than the length of the gripper 1 .
根据本发明的一重要特征，替代如上述Hilmar现有技术那样分别激活线圈，所述长度减小的线圈3随后以多个线圈的组4的形式被相继地激活，以便在片梭1上产生具有最优长度的线圈所产生的电磁吸引效果，而不受具有最优长度的线圈的典型缺陷的影响。According to an important feature of the invention, instead of activating the coils individually as in the Hilmar prior art described above, said coils 3 of reduced length are subsequently activated successively in groups 4 of a plurality of coils in order to produce The electromagnetic attraction effect produced by a coil of optimal length without being affected by the typical defects of a coil of optimal length.
此外，随着片梭1向前运动，根据片梭1所达到的位置，被激活的线圈的组4的位置也以每次一个线圈3、因此以非常渐进的方式相应地向前移动，并且利用这种同步性在片梭1上始终保持最大电磁力。因此，所述力F相对于片梭1的位置P的曲线呈在图4的上部中示意性示出的形状，因此系统始终在以最大效率、因此以最小能量浪费获得电磁吸引力F的条件下工作。图4示出了本发明的一实施例，其中针对线圈3的长度而采用的约数1/n是1/3，并且被同时激活的线圈的组4精确地包括3个线圈，使得每个被同时激活的线圈的组4在片梭上提供的性能与如上文限定的具有最优长度的线圈所提供的性能相同。Furthermore, as the gripper 1 moves forward, depending on the position reached by the gripper 1, the position of the group 4 of coils activated is also moved forward correspondingly, one coil 3 at a time, thus in a very gradual manner, and This synchronicity is used to maintain maximum electromagnetic force at all times on gripper 1. The curve of said force F with respect to the position P of the gripper 1 thus assumes the shape shown schematically in the upper part of Fig. 4, so that the system is always in the condition of obtaining the electromagnetic attraction force F with maximum efficiency and therefore with minimum waste of energy down to work. Figure 4 shows an embodiment of the invention in which the divisor 1/n adopted for the length of the coil 3 is 1/3, and the set 4 of simultaneously activated coils consists of exactly 3 coils such that each The group 4 of simultaneously activated coils provides the same performance on the gripper as a coil of optimal length as defined above.
从上文陈述的内容显而易见的是，当减小为确定线圈3的长度而选择的约数1/n的值时，施加在片梭上的电磁力F的曲线从脉动趋势变为越来越恒定的趋势，而这面临更高的装置复杂性和成本。因此，简单的优化计算允许针对每个单独装置或者织机类型限定所述约数的就整体经济性而言的优选值。It is evident from what has been stated above that, when reducing the value of the factor 1/n chosen for determining the length of the coil 3, the profile of the electromagnetic force F exerted on the gripper changes from a pulsating tendency to an increasingly A constant trend, which faces higher device complexity and cost. A simple optimization calculation thus allows to define for each individual device or type of weaving machine an optimal value of said submultiple in terms of overall economy.
为了适当地控制线圈3的相继激活，沿着投放轨迹设置有位置传感器5，所述位置传感器布置在毗邻的线圈3之间。由于线圈3具有减小的长度，因此传感器5能够以非常近的间距布置，使得片梭1的位置控制特别有效。传感器5检测片梭1在电磁引纬装置内的位置并且通过线路6将该位置用信号发送到电子控制CPU，所述传感器根据本发明的特定实施例选自市面可获得的多种类型的传感器(光学传感器、红外传感器、电容传感器、感应传感器等)中的一种。CPU从织机控制单元接收线圈3的供应电流的信号7，并且根据片梭1的位置激活功率级8，以便在随后的线圈组4中相继地供应该电流(每次移动一个线圈3)，以便在每一时刻都模拟相对于待加速的片梭1布置在理想相对位置中(即片梭尖端位于每个线圈组4的第一线圈3的入口附近)的具有最优长度的线圈的电磁力。因此，具有减小长度的线圈3的上述电子管理允许完成片梭1的投放并且使线圈中的焦耳效应所造成的能量损耗最小化，因此显著遏制如此产生的热量的处理问题，并且使系统的整体效率最大化。In order to properly control the successive activations of the coils 3 , position sensors 5 are provided along the dosing trajectory, said position sensors being arranged between adjacent coils 3 . Due to the reduced length of the coils 3, the sensors 5 can be arranged at very close distances, so that the position control of the gripper 1 is particularly effective. The sensor 5 detects the position of the gripper 1 within the electromagnetic weft insertion device and signals this position to the electronic control CPU via the line 6, said sensor being selected according to a particular embodiment of the invention from the various types of sensors available on the market (optical sensor, infrared sensor, capacitive sensor, inductive sensor, etc.). The CPU receives the signal 7 of the supply current of the coils 3 from the loom control unit and activates the power stage 8 according to the position of the gripper 1 in order to successively supply this current in the following coil groups 4 (moving one coil 3 at a time), In order to simulate at each instant the electromagnetic flux of a coil with an optimal length arranged in an ideal relative position with respect to the gripper 1 to be accelerated (i.e. the tip of the gripper is located near the entrance of the first coil 3 of each coil group 4 ). force. Thus, the above-mentioned electronic management of the coil 3 with reduced length allows to complete the shooting of the projectile 1 and minimizes the energy loss caused by the Joule effect in the coil, thus significantly curbing the handling problem of the heat thus generated and making the system Overall efficiency is maximized.
对于用于管理线圈组4的相继激活的CPU而言，还能够添加图5所示的闭环控制系统10。在这种情况中，替代上述已经预先限定的电流参考7，来自织机的时间t时的外部速度V或者位置S参考9到达控制系统10。换言之，根据织机到达的角位置或者根据设定的织机操作时间周期，这种外部参考9在任何时刻由织机的中央控制部更新。在框11中将这种参考信号9与传感器5所检测到的片梭1的实际位置进行比较，并且根据上述外部参考适当地调节发送到控制CPU的电流参考7，以便减缓或者加速片梭1。To the CPU for managing the successive activation of the coil assembly 4 it is also possible to add the closed-loop control system 10 shown in FIG. 5 . In this case, an external speed V or position S reference 9 at time t from the weaving machine arrives at the control system 10 instead of the above-mentioned already predefined current reference 7 . In other words, this external reference 9 is updated at any moment by the central control of the loom according to the angular position reached by the loom or according to the set operating time period of the loom. This reference signal 9 is compared in block 11 with the actual position of the gripper 1 detected by the sensor 5 and the current reference 7 sent to the control CPU is appropriately adjusted according to the above-mentioned external reference in order to slow down or speed up the gripper 1 .
因此，闭环控制装置10允许使片梭遵循设定的运动规律，从而允许使单个线圈3所消耗的功率平等，同时考虑到由于片梭1具有低初始速度更长时间地激活第一线圈3。The closed-loop control device 10 thus allows the grippers to follow a set law of motion, allowing equalization of the power consumed by the individual coils 3 , taking into account the longer activation of the first coil 3 due to the low initial speed of the gripper 1 .
来自织机的外部参考9能够最终包括关于每次处理的单个纬纱的具体信息，使得能够在每个织机周期，根据被引入的特定纬纱的要求来改变片梭的运动规律。The external reference 9 from the weaving machine can eventually contain specific information about the individual weft yarns processed each time, making it possible to vary the movement law of the gripper according to the requirements of the particular weft yarn being introduced, at each loom cycle.
相较于用于片梭投放的已知电磁装置，本发明的电磁装置包括多个优势，其中包括：The electromagnetic device of the present invention includes several advantages over known electromagnetic devices for projectile delivery, including:
-降低整体成本，既包括制造成本也包括运行成本；- Lower overall costs, both manufacturing and running;
-高可靠性；- high reliability;
-高效性；- Efficiency;
-纬纱具有降低的机械应力和/或根据纬纱类型的可控的机械应力；- weft yarns have reduced mechanical stress and/or controllable mechanical stress depending on weft yarn type;
-对片梭加速度曲线的控制；- control of projectile acceleration curve;
-由于高投放方向性，减少使用片梭引导系统(钩)、具有显著编织缺陷的源；- Reduced use of projectile guidance systems (hooks), sources with significant weaving defects due to high casting directionality;
-相对于剑杆织机(gripper loom)更高的工作频率。- Higher working frequency compared to gripper loom.
然而，应当理解的是，本发明不应被认为局限于上述具体布置方案，上述具体布置方案仅构成本发明的示例性实施例，在不背离本发明的由以下权利要求完全限定的保护范围的前提下，不同的变型方案是可行的并且全部在本领域中技术人员可实现的范围内。However, it should be understood that the present invention should not be considered limited to the specific arrangements described above, which merely constitute exemplary embodiments of the present invention, without departing from the scope of protection of the present invention as fully defined by the following claims. Various variants are possible under the premise and all are within the reach of a person skilled in the art.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI20150463 | 2015-03-31 | ||
| ITMI2015A000463 | 2015-03-31 |
| Publication Number | Publication Date |
|---|---|
| CN106012242Atrue CN106012242A (en) | 2016-10-12 |
| CN106012242B CN106012242B (en) | 2018-12-07 |
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|---|---|---|---|
| CN201610195453.3AActiveCN106012242B (en) | 2015-03-31 | 2016-03-31 | Calutron for introducing weft yarn in piece shuttle-type loom |
| Country | Link |
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| EP (1) | EP3075892B1 (en) |
| JP (1) | JP6894191B2 (en) |
| CN (1) | CN106012242B (en) |
| TR (1) | TR201820272T4 (en) |
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