ABB 3BHE009017R0101 Thermal resistance module

Four standard sizes measure web tension from 0.1 to 100 kN. With its extended-capacity feature, the PRT load cell is capable of measuring tension reliably over a 30:1 range. Superior overload characteristics in all force directions (up to 500 %) eliminate overload failures for all practical purposes. Exceptionally high spring constant virtually eliminates load cell contributions to machine vibration, even at very high machinery speeds. The performance of the load cells is unaffected by environmental factors like dust, corrosion and radio or electromagnetic interference.Extended-Range Operation Beyond their nominal capacity, PRT load cells have an extended range of measurement – so they can be sized for normal, as opposed to maximum, tension levels. As a result, they can process a wider variety of materials.

PRT load cells work well with both rotating (live) and non-rotating (dead) shafts. 

For live shaft applications, many different bearing types and sizes can be used. The load cell and the shaft can be integrated by first press-fitting the selected bearing onto the shaft and then sliding the assembly into the center hole of the PRT load cell. Or, alternatively, the roll shaft may be machined to create a shoulder that one side of the bearing rests against, while the other side is restricted by a snap ring. In live shaft assemblies, the roll is held securely in place by snap rings installed in grooves on each side of the bearing in the center hole of the load cell. Thermal expansion of the roll is accommodated by installing snap rings on both sides of the bearing in just one load cell.

The table presents a sampling of bearing

 specifications for PRT load cells for various shaft diameters and bearing types. Other bearing types and sizes can be accommodated, including both conventional SKF bearings and many self-locking Torrington-type bearings. The table includes typical examples of bearings for a variety of shaft diameters, based on specific load cell capacities, center hole diameters, and bearing widths (distance between snap rings). Of course, bearing load and rotational speed are also important specification criteria that must be considered when selecting an appropriate bearing. Only the bearings for the largest shaft diameters that fit standard PRT load cells are shown; many other options are available. ABB applications engineers can provide assistance with bearing selection

Application industry

The products can be used in the following industries: power plant, paper making, steel, mining, rubber, water supply, cement, chemical industry, glass, printing Textile, machinery, plastics, coatings, medicine, hospitals, food, hotels, scientific research institutions