Utjecaj vertikalnih vibracija rotora na silu kopanja rotornog bagera

Ovaj rad daje postupak određivanja sile kopanja rotornog bagera uzimajući u obzir karakteristike kopanog materijala, reznu ivicu lopatice, brzinu rezanja i vertikalne vibracije radnog kotača (rotora). Sila kopanja ovisi o specifičnom otporu kopanju (SOK) i ukupnoj duljini reznih rubova lopatice koje su istovremeno u zahvatu s kopanim materijalom. SOK je uvjetovan karakteristikama kopanog materijala, brzine rezanja i slučajna je veličina, dok ukupna duljina reznih rubova lopatice ovisi o broju lopatica koje su istovremeno u zahvatu s kopanim materijalom i vertikalnim vibracijama radnog kotača. Funkcija promjene ukupne duljine reznih rubova lopatica u ovisnosti od vremena dobivena je na osnovu dinamičkog modela rotornog bagera u vertikalnoj ravni, uzimajući u obzir pomak središta radnog kotača.

This paper provides a method of determining the BWE digging force considering the characteristics of soil which needs to be excavated, bucket cutting contour, cutting speed and vertical vibration of the bucket wheel. Digging force depends on the specific force resistance to excavation (SFRE) and the total length of buckets cutting contours that are simultaneously in mesh with the material. The SFRE is conditioned by the characteristics of material, cutting speed and it is random variable, while the total length of buckets cutting contours depends on the number of buckets that are simultaneously in mesh with the soil and vertical oscillations of the bucket wheel. Total length of buckets cutting contours time function is determined considering moving of bucket wheel center point, based on a dynamic model of BWE in the vertical plane.