3BHE033067E0102順序控制模塊
機械安裝中的故障跟蹤
機械布置中有許多零件可能導致故障。程度
這些故障是可重復的?？赡艿脑蚍譃橐韵聨最?。
?安裝表面或適配器板有缺陷。
?強制分流。
?（稱重傳感器和適配器板安裝不足。
?軋輥和軸承。
?從動輥。
6.4.1安裝表面、支架或轉接板有缺陷
未加工或加工不良的安裝表面不平整，可能導致彎曲或
稱重傳感器扭轉。這可能導致零點不穩(wěn)定。
6.4.2強制調車
力分流意味著一些力被分流通過稱重傳感器。這可能是由于：
通過稱重傳感器的力受到某種阻礙。例如，
安裝不正確，妨礙移動。另一個可能的原因是
滾輪不能在測量方向上自由移動，可能是因為安裝了某些東西
離軸承箱太近，或因為物體松動而卡住
在軸承箱和相鄰部件之間。
力分流導致卷筒紙/帶材張力指示低于實際卷筒紙/帶張力。
6.4.3稱重傳感器和轉接板的緊固
未正確擰緊或失去預緊力的螺紋接頭，原因
在配合表面處滑動。稱重傳感器的緊固尤其關鍵。如果稱重傳感器不是
如果適當固定，零點將不穩(wěn)定。在其他表面之間滑動可能會導致同樣的癥狀。
6.4.4軋輥和軸承
設計不當?shù)妮S承布置可能會導致高軸向力。卷應該是一端固定，另一端自由。
如果兩端固定 由于軸的膨脹，將產(chǎn)生高軸向（推力）力
溫度上升。即使正確設計的軸承布置也可能隨著時間而惡化；軸承磨損，
這可能會產(chǎn)生類似的癥狀，如冷和熱之間零點漂移緩慢或信號中的突然跳躍。
6.4.5從動輥
一個很少被懷疑的錯誤來源是滾動本身。在以下情況下，效果尤為關鍵：
稱重傳感器上的測量力相對較低。帶相關萬向節(jié)的長驅動軸
如果未正確維護接頭，接頭可能會導致不穩(wěn)定信號。潤滑很重要
Fault Tracing in the Mechanical Installation
There are a number of parts in the mechanical arrangement that can cause faults. The extent to
which these faults are repeatable differs. Possible causes fall into the following groups.
? Defective mounting surface or adapter plates.
? Force shunting.
? (nsufficient mounting of load cell and adapter plates.
? Rolls and bearings.
? Driven roll.
6.4.1 Defective Mounting Surface, Support or Adapter Plates
An unmachined or poorly machined mounting surface, which is uneven, may cause bending or
twisting of the load cell. This may result in instability of the zero point.
6.4.2 Force Shunting
Force shunting means that some of the force is diverted past the load cell. This may be caused by
some kind of obstruction to the force through the load cell. The connecting cables, for example,
have been incorrectly installed and are preventing movement. Another possible cause is that the
roll is not free to move in the direction of measurement, possibly because something is mounted
too close to a bearing housing, or because an object has worked loose and become trapped
between the bearing housing and adjacent parts.
Force shunting causes the web/strip tension indication to be lower than the actual web/strip tension.
6.4.3 Fastening of Load cell and Adapter Plates
Screw joints that have not been properly tightened or have lost their pre-tightening force, cause
sliding at the mating surfaces. Fastening of the load cell is especially critical. If a load cell is not
properly secured, the zero point will be unstable. Sliding between other surfaces may cause the
same symptoms.
6.4.4 Rolls and Bearings
An incorrectly designed bearing arrangement may give rise to high axial forces. The roll should be
fixed at one end and free at the other.
If both ends are fixed there will be a high axial (thrust) force due to expansion of the shaft with
rising temperature.
Even a correctly designed bearing arrangement may deteriorate with time; bearings become worn,
and so on. This may give similar symptoms, such as slow zero point drift between cold and hot
machine, or sudden jumps in the signal.
6.4.5 Driven Roll
A source of error that is seldom suspected is the roll itself. The effect is especially critical when
measuring forces on the load cell are relatively low. Long drive shafts with their associated universal
joints may cause unstable signals if they are not properly maintained. It is important to lubricate
