SCM-500-01-01 SCM-500-01-01-ENG 手持操作控制仪表 Parker

SCM-500-01-01 SCM-500-01-01-ENG 手持操作控制仪表 Parker
测量设备可分为四部分：
•机械安装。
•称重传感器。
•接线盒和电缆。
•控制单元（参见控制单元手册）。
故障症状指示故障所在的部位。
•机械安装中的故障通常会导致零点不稳定或灵敏度不正确。
如果故障发生在过程中的其他事件之后，如温度，或可能与
对于特定的操作，它可能源于机械装置中的某些东西。
•称重传感器非常坚固，可在测量方向承受五倍于其标称负载。如果称重传感器仍然过载，其数据已
改变，这可能是由于轧机中发生的事件，如腹板/带材断裂。过度过载时，首先发生的是零点偏移。
•布线故障可能导致干扰或零点不稳定等问题。一些
故障可能是由于电缆接近导致干扰。不正确的安装，如电缆或多个端部接地的屏蔽不平衡，可能导致
零点变得不稳定。电缆会受到机械磨损，应
定期检查。还应检查接线盒，尤其是在以下情况下：
振动
•控制单元故障通常会导致功能间歇性丧失。这是不寻常的
控制单元导致稳定性问题。连接装置中的故障可能会影响
控制单元。有关更多详细信息，请参阅控制单元手册。
压力导管枕式称重传感器，水平测量PFTL 101，用户手册
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6.4机械安装中的故障追踪
机械布置中有许多部件可能导致故障。程度
这些故障是可重复的。可能的原因分为以下几组。
•安装表面或转接板有缺陷。
•强制分流。
•（称重传感器和适配器板安装不充分。
•辊和轴承。
•驱动辊。
6.4.1安装表面、支架或转接板有缺陷
未加工或加工不良的安装表面不平，可能导致弯曲或
称重传感器的扭转。这可能导致零点的不稳定性。
6.4.2强制调车
力分流是指部分力分流通过称重传感器。这可能是由于：
通过称重传感器的力受到某种阻碍。例如，
安装不正确，导致无法移动。另一个可能的原因是
辊不能在测量方向上自由移动，可能是因为安装了某些部件
太靠近轴承箱，或由于物体松动而被卡住
在轴承箱和相邻部件之间。
强制分流导致腹板/带材张力指示低于实际腹板/带料张力。
6.4.3称重传感器和转接板的紧固
未正确拧紧或失去预紧力的螺纹接头，原因
在配合面上滑动。称重传感器的紧固尤其重要。如果称重传感器不
如果适当固定，零点将不稳定。在其他表面之间滑动可能导致
同样的症状。
6.4.4轧辊和轴承
设计不当的轴承布置可能会导致高轴向力。卷应该是
一端固定，另一端自由。
如果两端固定由于轴的膨胀，将产生较高的轴向（推力）
温度上升。
即使是正确设计的轴承布置也可能随着时间而恶化；轴承磨损，
这可能会出现类似的症状，如冷和热之间零点漂移缓慢
或信号中的突然跳跃。
6.4.5从动辊
很少有人怀疑的错误来源是辊本身。在以下情况下，效果尤其关键：
测力传感器上的测量力相对较低。长驱动轴及其相关的万向轴
如果接头维护不当，可能会导致信号不稳定。润滑很重要
压力导管枕式称重传感器，水平测量PFTL 101，用户手册
6故障追踪
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SCM-500-01-01 SCM-500-01-01-ENG 手持操作控制仪表 Parker

SCM-500-01-01 SCM-500-01-01-ENG 手持操作控制仪表 Parker
Measuring equipment can be divided into four parts:
• mechanical installation.
• load cell.
• junction boxes and cables.
• control unit (see control unit manual).
The fault symptom indicates the fault location.
• faults in mechanical installation usually lead to unstable zero point or incorrect sensitivity.
If the fault occurs after other events in the process, such as temperature, or may be related to
For a specific operation, it may originate from something in the mechanical device.
• the load cell is very robust and can withstand five times its nominal load in the measuring direction. If the load cell is still overloaded, its data has
Change, which may be due to an event occurring in the rolling mill, such as web / strip fracture. In case of excessive overload, the first occurrence is zero offset.
• wiring failure may lead to interference or unstable zero point. some
The failure may be due to interference caused by cable proximity. Incorrect installation, such as unbalanced shielding of cables or multiple end grounding, may cause
The zero point becomes unstable. The cable will be subject to mechanical wear and tear, and should
Regular inspection. The junction box shall also be inspected, especially in the following cases:
Vibration
• control unit failure usually leads to intermittent loss of function. This is unusual
The control unit causes stability problems. A failure in the connecting device may affect:
Control unit. Refer to the control unit manual for more details.
Pressure conduit pillow type load cell, level measurement pftl 101, user manual
6) fault tracing
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6.4 fault tracking in mechanical installation
There are many components in the mechanical arrangement that may cause failures. degree
These faults are repeatable. The possible causes are divided into the following groups.
• defective mounting surface or adapter plate.
• forced diversion.
• (load cell and adapter plate are not installed sufficiently).
• rollers and bearings.
• drive roller.
6.4.1 the installation surface, bracket or adapter plate are defective
Rough or poorly machined mounting surfaces may cause bending or
Torsion of load cell. This may cause instability of the zero point.
6.4.2 forced shunting
Force splitting means that part of the force is split through the load cell. This may be due to:
The force passing through the load cell is somewhat hindered. For example,
It cannot be moved due to incorrect installation. Another possible reason is
The roller cannot move freely in the measurement direction, possibly because some parts are installed
Too close to the bearing box or stuck due to loose objects
Between the bearing housing and adjacent components.
The forced shunt causes the web / strip tension indication to be lower than the actual web / strip tension.
6.4.3 fastening of load cell and adapter plate
Threaded joints that are not tightened correctly or lose preload, cause
Slide on the mating surface. The fastening of the load cell is particularly important. If the load cell does not
If properly fixed, the zero point will be unstable. Sliding between other surfaces may cause:
The same symptoms.
6.4.4 rolls and bearings
Poorly designed bearing arrangements can lead to high axial forces. Volume should be
One end is fixed and the other end is free.
If both ends are fixed  due to the expansion of the shaft, higher axial (thrust) will be generated
temperature rise.
Even correctly designed bearing arrangements may deteriorate over time; Bearing wear,
This may cause similar symptoms, such as slow zero drift between cold and hot
Or a sudden jump in the signal.
6.4.5 driven roller
The source of error that few people suspect is the roller itself. The effect is particularly critical when:
The measuring force on the load cell is relatively low. Long drive shaft and its associated cardan shaft
If the connector is not properly maintained, the signal may become unstable. Lubrication is very important
Pressure conduit pillow type load cell, level measurement pftl 101, user manual
6) fault tracing
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SCM-500-01-01 SCM-500-01-01-ENG 手持操作控制仪表 Parker