SEW 822675X.13.17逻辑模拟量顺序卡件

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SEW 822675X.13.17逻辑模拟量顺序卡件

双眼并条机的自调匀整系统
采用二套匀整装置，二眼分别进行有效控制。其匀整装置可配瑞士乌斯特USG或国产航空总公司613所BYD，二者性能上均能满足匀整范围。
(1)控制一罗拉的主电动机是由一个由变频器驱动的变频电动机，这样由PLC通过串行通信的方式对其进行速度控制，可根据需要实现起动的无级变速。
(2)二罗拉与三罗拉通过齿形带相连，完成有着固定牵伸比的预牵伸，二罗拉由一个伺服电动机进行拖动，同时在一罗拉主轴上设置一个编码器，该编码器与拖动二罗拉的伺服电动机控制器相连，通过对该控制器的参数的设置，利用其电子齿轮的功能，使得无论一罗拉速度高低，二罗拉与一罗拉的牵伸比始终保持设定的一个比例关系。
(3)拖动二罗拉的伺服电动机由PLC通过一定的控制算法，经过与控制器的串行通信实现其调速。
(4)凹凸检测罗拉通过一个放大装置，将位移放大，还安装有一个位移传感器。同时在检测罗拉的旁边放置一个脉冲信号发生器，当检测罗拉转过一定的角度，即棉条经过一定的位移后，发出一个脉冲，实现其定长检测控制，克服以前定时检测在速度不稳定时，计算匀整延时困难的不足。脉冲信号发生器通过一个串口和PLC实现通信。 (5)在整个并条机的过程控制、故障诊断、红外线自停及简单的日常数据处理仍由PLC实现，由PLC统一协调整个自调匀整系统。
匀整系统参见图1。
凹凸罗拉
伺服电机
齿轮箱
位移传感器
转速器
变速传感器
喇叭口
前置放大器
压辊速度传感器
5.电气控制系统分析与设计
5．1电气控制选型
选用台达可编程控制器PLC，触摸屏控制，实现人机对话。触控式控制面板能显示相关运转数值，能在运转状态下设定输出速度，能对异常警报断电记忆，方便管理。方便调整及检测。采用变频调速，减少皮带轮变换，解决开关车时瞬间条干恶化。
在牵伸机件中，前罗拉控制采用5.5KW变频器;电磁刹车方式;
吸风电机:0.75KW.一般直接驱动无须变频器,启动可能有一定的噪音.
后罗拉控制,大多设备并无控制,前后罗拉位置相对固定,需要机械调整罗拉支架滑块.现在也有在后罗拉处用一颗1KW
伺服控制
后罗拉的位置，增加1个旋编检测位置.
5.2自动换桶
自动换桶并条机提高自动化程度能减轻操作工的劳动强度，普遍采用定长，主机停车，积极式断条，换桶电机启动经机械传递回转推杆。推出满桶，送进空桶并定位，主机启动后完成换桶过程。
满桶后，圈条盘出口自动定位，主机停车，依次换桶电机启动带动弧形推桶板推出满桶、断条、推桶板退回；转臂电机启动使转臂向下旋转90°；推动电机再启动，通过转臂将满桶继续外推；补桶电机通过传动由拨盘将空桶送至预定位置，拨盘退回；推动电机经转臂将空桶拉到底盘上；转臂电机使转臂上旋90°，后主电机启动。完成全部换桶过程只需30多秒。该过程由PLC控制，保证了换桶的可靠性。
5。3洁与吸风
（1）上清洁形式有回转绒套、金属钢棒、浮动清洁棒、清洁杆等。通过上吸风将其聚集的花衣吸人棉箱，达到清洁上罗拉的要求。
（2）下清洁形式有丁晴刮圈、单皮圈往复、橡皮片等，并通过下吸风口将花衣吸入风箱，能有效的除去棉条中的杂尘。
（3）吸风装置均独立设计、使用，自成系统，配备1．5KW左右的2级电机，提高了传动的可靠性。吸棉箱设计有积极式自动剥棉装置，并附有贮棉仓；FA311增加刮棉箱；也有采用涡流排风方式。均使金属过滤网表面不积花衣和粉尘，达到气流畅通，满足吸风要求。
5。4喂入与自停
（1）导条方式多数机型采用高架积极式，高度可调。导条罗拉已由一端支撑发展为双支撑，减少振动、适应高速。导条罗拉由镀铬光面向铝合金沟槽发展，精度提高，重量减轻。Autoleveller system of double eye drawing frame
Two sets of leveling devices are used to effectively control the two eyes. Its homogenizing device can be equipped with USG of Ulster, Switzerland, or BYD of 613 Institute of China National Aviation Corporation, both of which can meet the homogenizing range in performance.
(1) The main motor controlling a roller is a variable frequency motor driven by a frequency converter. In this way, PLC can control its speed through serial communication and realize stepless speed change for starting as required.
(2) The two rollers are connected with the three rollers through the tooth shaped belt to complete the pre drafting with a fixed drafting ratio. The two rollers are driven by a servo motor. At the same time, an encoder is set on the main shaft of one roller. The encoder is connected with the servo motor controller that drives the two rollers. By setting the parameters of the controller and using the function of its electronic gear, The drafting ratio of two rollers and one roller always keeps a setproportional relationship.
(3) The servo motor driving two rollers is adjusted by PLC through certain control algorithm and serial communication with the controller.
(4) The concave convex detection roller amplifies the displacement through a magnifying device, and a displacement sensor is also installed. At the same time, a pulse signal generator is placed next to the detection roller. When the detection roller turns a certain angle, that is, after the sliver passes a certain displacement, it sends a pulse to realize its fixed length detection control, overcoming the shortcomings of the previous timing detection when the speed is unstable and calculating the leveling delay. Pulse signal generator communicates with PLC through a serial port. (5) The process control, fault diagnosis, infrared auto stop and simple daily data processing of the whole drawing frame are still realized by PLC, and the whole autoleveller system is coordinated by PLC.
The levelling system is shown in Figure 1.
Concave convex roller
servo motor
Gearbox
Displacement sensor
Tachometer
Variable speed sensor
Bell mouth
Preamplifier
Pressure roll speed sensor
5. Analysis and design of electrical control system
5.1 Selection of electrical control
Delta programmable controller PLC and touch screen control are selected to realize man-machine dialogue. The touch control panel can display the relevant operation values, set the output speed under the operation state, and memorize the abnormal alarm and power off for convenient management. It is convenient for adjustment and detection. Frequency conversion speed regulation is adopted to reduce the change of belt pulley and solve the problem of instant yarn deterioration when turning on and off.
In the drafting machine, 5.5KW frequency converter is used for front roller control; Electromagnetic braking mode;
Suction motor: 0.75KW. Generally, direct drive does not require frequency converter, and there may be some noise when starting
The rear roller is controlled. Most of the equipment has no control. The position of the front and rear rollers is relatively fixed. The slider of the roller bracket needs to be adjusted mechanically. Now, a 1KW roller is also used at the rear roller
servo control
Add 1 spinning detection position to the position of the rear roller
5.2 Automatic barrel change
The improvement of automation of automatic barrel changing drawing frame can reduce the labor intensity of operators. It generally adopts fixed length, main machine shutdown, active bar breaking, barrel changing motor startup and mechanical transmission of rotary push rod. Push out the full barrel, feed the empty barrel and locate it, and complete the barrel change process after the host starts.
After the barrel is full, the exit of the coiling reel is automatically positioned, the host machine stops, the barrel changing motor starts in turn to drive the arc bucket pushing plate to push out the full barrel, broken bars, and bucket pushing plate back; The rotary arm motor starts to rotate the rotary arm 90 ° downward; Push the motor to restart, and continue to push the full barrel outward through the rotary arm; The bucket replenishing motor drives the empty bucket to the preset position by the dial, and the dial returns; Push the motor to pull the empty barrel onto the chassis through the rotary arm; The rotary arm motor rotates the rotary arm upward by 90 °, and finally the main motor starts. It only takes more than 30 seconds to complete the whole barrel changing process. The process is controlled by PLC to ensure the reliability of barrel change.
5。 3 Cleaning and air suction
(1) The upper cleaning forms include rotary pile sleeve, metal steel rod, floating cleaning rod, cleaning rod, etc. The flower clothes gathered by the upper suction are sucked into the cotton box to meet the requirements of cleaning the upper roller.
(2) The lower cleaning forms include Ding Qing scraper ring, single leather ring reciprocating, rubber sheet, etc., and the floral clothes are sucked into the bellows through the lower suction port, which can effectively remove the dust in the cotton sliver.
(3) The air suction devices are designed and used independently, and are self-contained. They are equipped with a two-level motor of about 1.5KW, which improves the reliability of transmission. The cotton suction box is designed with a positive automatic cotton stripping device and a cotton storage bin; FA311 added cotton scraper box; Vortex ventilation is also used. All of these make the surface of the metal filter screen free of flower clothes and dust, so as to achieve smooth airflow and meet the requirements of air suction.
5。 4 Feeding and automatic stop
(1) Most of the models adopt the overhead positive type with adjustable height. The guide roller has developed from one end support to double support, reducing vibration and adapting to high speed. The guide roller is developed from chrome plating to aluminum alloy groove, with improved accuracy and reduced weight.