SUBSTANTIATION OF DESIGN-REGIME PARAMETERS OF THE VIBRATION-EXCITER IN THE FORM OF SECTOR DEBALANCER
The urgent problem of optimization the design-regime parameters of vibrating machines used for soil treatment are considered in the article. The scientific novelty of the study and its originality lies in the theoretical substantiation of the method of optimization of the vibration-exciter designed in the form of a sector debalancer, which having the lowest possible weight and power consumption, is to have the greatest disturbing force. The study was performed at the Department of Design and Management of Technical Systems of the Orenburg State Agrarian University. The standard methods of theoretical mechanics, mathematical analysis, mathematical statistics etc. have been used in the study. The above form of the sector debalancer purposed to minimize the design parameters allows it to obtain its optimum design sizes due to the angle and the inner radius r1, taking into account the mode parameters. It is proved that the recommended vibration frequency of the sector debalancer can be in the range of 50-70 Hz. The further frequency increase is limited by technical possibilities of creating a reliable and durable design of the vibrator and the machine on which the exciter is to be installed. In this regard, the maximum angular velocity of the sector debalancer is to be in the range of 314- 439 rad/s. At the initial moment when the disturbing force is increasing the power increase is negligible. When ω=140-145 rad/s, the power curve approaches the line of the disturbing force. As result, the power consumption for the maintenance of oscillations is increasing, while the disturbing force of the sector debalancer is reducing. Therefore, the value of the angular velocity of the sector debalancer should not exceed 150 rad/s depending on the constant values of the geometric parameters of the debalancer. It is concluded that the reasonable design-mode parameters of the sector debalancer are to lead to the reduction of energy consumption for maintaining the forced oscillations of the vibration exciter in the soil tillage machines.