皮带复卷机-4复卷参数(译)

1.OPERATING INSTRUCTIONS操作说明

4WINDING PARAMETERS复卷参数

4.1Roll quality纸卷质量

The rolls made with a winder or a rewinder must withstand package handling, storage, transportation and other extended handling. In addition, printing paper rolls require good runability in the printing machine.

复卷或者再复卷出的纸卷都必须经过打包处理，贮存，运输和其它延伸出来的处理。此外，印刷用纸卷要求要有很好的运行能力在印刷机上。

A good roll which meets the previously mentioned requirements is such, that its tightness, from the core to the surface, is even and preferably decreases evenly. All sharp changes in tightness and hardness negatively affect the characteristics of the roll. Furthermore, a good roll has straight ends, the core is as wide as the roll and in the middle of the roll.

一个好的纸卷要满足前面提到的要求那样，它的紧度，从纸芯到表面，平坦最好是均匀地缩短，在紧度和硬度上所有的突然变化都会对纸卷的规格参数造成不良影响。此外，一个好的纸卷端面要笔直，纸芯的宽度和纸卷一致并在纸卷的中间。

The figure shows the change in the radial compression pressure, representing the roll tightness as a function of the roll radius.

图表给出在压力压缩时径向的变化，表示纸卷紧度与纸卷半径的一个函数图。

Shape of a good roll structure一个好纸卷的结构外形

4.2Factors affecting the roll tightness and quality

影响纸卷紧度和质量的因素

4.2.1The factors affecting the roll tightness during winding

在复卷期间影响纸卷紧度的因素

●Winding pressure in the nip between the drum and the roll

复卷时在底辊和纸卷间的压区压力

●Strength difference between the drum and the set of belt rolls

底辊和皮带辊之间的压差

●Web tension

纸幅张力

●Running speed, acceleration and deceleration

运行速度，加速和减速

4.2.2Factors independent of the winder

复卷机以外的因素

●Core characteristics

纸芯品质

●Paper characteristics

纸质

●Transport and storage

运输和贮存

●Influencing factors in extended handling

延伸出来的处理中的影响因素

4.3Rider roll relief

压纸辊减压

Winding pressure is controlled by adjusting the loading of the rider roll as the roll diameter increases.

复卷压力控制由压纸辊根据纸卷的直径增加来调节加载

The rider roll is used in the initial stages of winding to give extra load to the rolls. In the later stages of winding, the rider roll load is relieved. In the final stages, the rider roll keeps the rolls in place.

压纸辊被用于复卷初期给纸卷以额外的负荷，在复卷的后期，压纸辊负载被解除，在末期，压纸辊保持纸卷在合适的位置。

Rider roll relief is logically controlled and the rider roll load changes

along the programmed curve when the roll diameter increases. The rider roll beam is equipped with load cells which measure the load between the rider roll and the rolls. On the basis of these measurements, the cylinder pressure of the rider roll is controlled so the load of the rider roll is in accordance with the selected program.

压纸辊减压是逻辑控制的并且当纸卷直径增加时压纸辊负载变化是按着编程曲线的，压纸辊的横梁上安装有能够测量压纸辊和纸卷之间负载的测压元件，在这些测量基础上，控制压纸辊汽缸压力使得压纸辊上的负载与选择的程序一致。

The pressure relief program for the rider roll must be selected in accordance with the paper quality and the final diameter of the set.

压纸辊的减压程序的选择一定要与纸的质量和设置的最终直径一致。

If there are large variations in the cross directional thickness profile of the paper, and an excessive rider roll load causes creasing on the rolls, or the winder has continuous breaks, it is necessary to use a lighter rider roll program.

如果在相交方向上纸的侧面厚度存在大的变化，并且过分的压纸辊负载在纸卷上引起折痕，或者复卷机连续断纸，这时有必要使用一个轻一些的压纸辊程序。

The curve shows the dependence of the cylinder pressure on the roll diameter.

这个曲线表示汽缸压力与纸卷直径的关系。

4.4Tension in the set of belts

皮带张力

After the roll diameter reaches approx. 530mm (20.9 in), a portion of the roll weight will start to transfer evenly onto the belt support. Changing the belt tension influences the extent of the support strength. Belt tension is controlled by adjusting the pressure in the hydraulic cylinders which push the belt rolls apart.

在纸卷直径大约达到530mm (20.9 in)以后，部分纸卷的重量开始均匀地转移到皮带支撑上，变化的皮带张力会影响支撑力的限度，皮带张力由推开皮带辊的液压缸调节压力来控制。

Tension in the set of belts皮带张力

The rear drum nip load can be maintained at a required value with the belt tension because increasing the belt tension will press the roll against the rear drum.

后底辊的压区负荷通过皮带张力能够被保持在一个需要的值上，因为增加皮带张力会使纸卷紧压向后底辊。

The belt tension has a reverse effect on the belt roll nip load, i.e. if the belt is tightened, the nip load decreases and vice versa.

皮带张力可以取消在皮带辊上的压区负荷影响，即，如果皮带张紧，压区负荷会减小，反之亦然。

When the belts start to support the roll, the nip loads are mainly

determined on the basis of the roll mass and the supporting

strength of the belt. The basis weight of the paper must be fed in correctly, so that the supporting strength of the belt has an appropriate value.

当皮带开始支撑纸卷时，压区负荷主要决定在纸卷基础的重量和皮带的支撑力上，纸的基础重量必须正确的输入，以便皮带的支撑力有一个适当的值。

Operating principle工作原理

4.5Web tension纸幅张力

Web tension is measured with load cells located in the slitting section. Tension is maintained with a brake generator. Tension adjustment is automatic, meaning the web tension remains at a set value during the run.

纸幅张力由在切纸单元的测压元件测量，张力与一个刹车发生器保持联锁，张力调节是自动的，意思是在复卷期间纸幅张力停留在一个设定值。

The correct level of web tension is determined by the strength and

other characteristics of the paper. The web must be kept so tight that the tension straightens the possible bags and prevents the rolls from crossing.

一个正确的纸幅张力由纸的强度和其它品质而定的，纸幅必须被保持拉紧以便把可能松弛的拉直和防止纸卷交差。

NOTE: Usually the web tension control is activated only when sufficient crawling or running speed has been reached.

注意：通常只有当达到爬行或者运行速度时纸幅张力被触发。

4.6Winding force复卷力

4.6.1General总体的

Winding force is a force comparable to the web tension by which the web is tightened during windup after the first winding nip. The winding force is effected with the torque of the front winding drum. The winding force also describes the first drum's share of the total drawing force for the windup, which is of equal size with web tension.

复卷力是一个力相当于在复卷期间第一个复卷压区后使纸张紧的纸幅张力，复卷力受到前复卷底辊的转矩的影响，复卷力也描绘出第一个底辊复卷的总牵引力的分配，这和纸幅张力一样大小。Previously, the winding force was a result of the adjustment of the torque difference or ratio. The size was estimated by means of the drums' torque ratio. When the diameters and the inertias of the

drums were of different sizes, it was difficult to estimate the amount of the winding force from the torques of the drums or from the torque difference without calculations.

以前，复卷力是调节转矩差或比率的一个效果，大小是通过底辊转矩比估计出来的。当底辊的直径和惯性有大小差别时，要通过底辊的转矩或者在没有计算时通过转矩差来估计复卷力的数是很困难的。Currently, the required winding force is determined in the control system. The electric drive generates the required front drum torque. The torque of the speed regulated rear drum will set so that the force balance remains constant between unwinding and wind-up.

目前，要求要确定复卷力在控制系统中，电力传动产生出所需要的前底辊转矩，速度调节的后底辊产生的转矩将固定不变以便于在退纸和复卷间的力保持不变。

Winding tightness is partly controlled by the winding force. Increasing the winding force increases tightness and decreasing the winding force decreases the tightness. During acceleration, an additional winding force is available that compensates the roll slackening effect caused by the acceleration. Decreasing the winding force during deceleration, decreases the roll tightening effect caused by braking.

复卷紧度是复卷力控制的一部分，增加复卷力增加紧度同样减小复卷力减小紧度。在加速期间，一个额外的复卷力可以补偿由于加速

而引起的纸卷松弛，减小复卷力在减速期间，减小由于刹车而引起的纸卷紧密。

4.6.2Amount of winding force复卷力的数

Winding force is set so that the desired effect, which tightens the roll, is achieved and slipping is not generated between the rolls and the drums. The friction force between the paper roll and the support belt limits the technical range of use for the winding force. The friction force is dependent on the friction coefficient between the paper, the support belts and the nip load. In addition to the above, the size of the wrap angle and web tension act on the rear drum.

复卷力被设置以便于得到需要的效果，就是要达到纸卷收紧并且在纸卷和底辊间不会产生打滑现象。在纸卷和工艺技术范围限制内的支撑皮带之间的摩擦力用于复卷力，摩擦力由在纸，支撑皮带和压区负载间的摩擦系数决定的，除上述内容外，包角的大小和作用在后底辊的纸幅张力。

Winding tightness that occurs on the front drum determines the upper limit for the winding force. The lower limit is determined by the slipping that occurs on the rear drum or bagging of the paper. When the web tension changes drastically, use speed difference measuring to ensure no slipping occurs between the drums.

复卷紧度发生在前底辊决定的复卷力上限，下限由发生在后底辊

的打滑或者是纸的松弛决定的，当纸幅张力变化较大时，使用测量的速度差来确保在低辊间不会打滑。

F-Winding force F-复卷力T-Web tension T-纸幅张力

A wider winding force range may be used on WinBelt winders due to the larger friction surface of the belt rolls. The winding force of the WinBelt winder is typically larger than the web tension. This often results in the rear drum serving as a generator even during running. Because the nip load level of the WinBelt winder is lower than that of the two-drum winder, the winding force can be utilized more effectively to produce desired roll tightness.

WinBelt复卷机可使用一个较大的复卷力范围来适应于皮带辊表面很大的摩擦，WinBelt复卷机是典型的复卷力大于纸幅张力，这通常会导致在运行期间后底辊充当平衡发生器。由于WinBelt复卷机的压区负荷强度要比两辊式复卷机低些，复卷力能够被更有效的使

用去生产出需要的纸卷紧度。

4.7Running speed运行速度

Select a running speed that is suitable for the current conditions. If intense vibration occurs during winding, the running speed must be slowed immediately.

要根据现有的条件来选择合适的运行速度，如果在复卷过程中发生强烈的振动，运行速度要马上降低。

We recommend that the winder is accelerated up to the desired running speed with a single acceleration procedure and not in phases. Continuous changes in the running speed should be avoided.

我们建议复卷机加速到需要的运行速度以一个独立的加速步骤而不是一个阶段，应该避免连续改变运行速度。