| 摘要 |
The production and operation of high-performance press-rollers having the usual design always entails considerable production and maintenance costs to set and maintain the pressure in the working slit of the roller arrangement at a constant value over the length of the roller. The new roller arrangement avoids the undesirable warping of the rollers. The roller arrangement has a magnetic circuit that includes both rollers. The magnetic circuit consists of a cylindrical magnetic core (4), several poles (5) axially distributed on the magnetic core, a cylindrical exciter (3) and control windings (14) arranged between said poles, a magnetic shell that encloses the whole circumference of one roller and is made of two parts separated by a ring-shaped secondary air gap (11), and a continuous magnetic shell in the axial direction arranged at the outer circumference of the other roller. When used to process webs of material in the textile, paper, plastic and metallurgical industries, this electromagnetic roller arrangement achieves high quality standards with a high productivity. The solution provided by the invention is shown on the figure above. |
