Continuous stream of powder materials , activities , mean chaos and adhesion measurement accuracy of the conveyor and is not significantly affected the normal operation of the chaos , it should ensure that the physical properties and position the pressure is less chaotic, silo discharge mean smooth to prevent the collapse of red material or bagging positions blocking material . In addition , the frequency of the grid voltage is less mess , no significant fouling accumulation of materials on the scale body , maintaining the same scale body weight of each sector , is essential to ensure measurement accuracy , it is necessary to give adequate protection .
The actual trajectory of the material is both lateral longitudinal velocity trajectory another forward speed , and the speed of longitudinal and transverse screw speed depends not only simple , but also filled with the material humidity , particle size , viscosity , and the activity volume, the pressure change is closely related to other factors . In the actual industrial production , these factors are often followed by the time condition varies , thus causing rotation of the spiral longitudinal velocity of material can not maintain a constant relationship between the time synchronization , i.e., a screw speed in a unified state , sometimes the actual flow rate of material is not the same . Therefore, the number of revolutions of the spiral is often measured not represent the true flow rate of material , there is randomness , resulting in non-negligible speed measurement error , we can say this is the screw conveyor "deficiencies " , so try to keep property, warehouse and material flow pressure balanced chaos, scheduled calibration verification is often necessary measures to ensure high measurement accuracy .
The course material loading conveyor can be directly measured , because the screw shaft and blade adhesion material , do not move the spiral layer of material and material thickness varies randomly channeling material reflux , have a direct impact on the inevitable load measurement accuracy , especially in the adhesion of materials and channeling material impact is very obvious. So, screw conveyor scales substandard water for large viscosity materials , substandard use strong abrasive materials .
Whichever delivery scale body , once adjusted tare should keep unchanged , to keep the system 0:00 chaos. So, from the scale structure design should strive fouling facet plot material , all parts by weight, not chaos ; should always be promptly removed accumulated fouling materials such as changes in applied load from maintenance. To do this often detected on schedule adjustment , which is an important means to ensure good measurement accuracy .