ESTABLISHMENT OF RATIONAL PARAMETERS OF VIBRATIONS OF VIBRATION-EXCITER FUNCTION ELEMENTS PROVIDING IMPROVED EFFECIENCY OF MINING COMBINES

The laws determining the formation of force and power parameters of the coal cutting vibration-active process. The parameters have been investigated for coals for the first time and have been determined, with search for a rational amplitude-frequency range taken into account. Analytical dependences have been obtained to calculate the power consumed by the vibration exciter drive; the power is determined considering the drive design and loading on the function element. A mathematical model of the cutting portion drive has been developed; at its development, Rayleigh's method has been applied, and the elastic properties of separate elements of the transmission have been considered. The laws of forming the loads in the transmission system of the cutting portion drive have been found out, with the effect of the rigidity of the elastic coupling and rate of change of the torque from the vibration exciter on the working element taken into account. "Methods of selection of rational parameters of the exciter of torsional vibrations of the vibration-active function element of the mining combine" have been worked out. The methods have been used at developing the engineering proposal relating to the creation of the vibration-active function element of the cleaning combine K-85Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio