International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-9 Issue-3, February, 2020 915 Retrieval Number: B4016129219/2020©BEIESP DOI: 10.35940/ijeat.B4016.029320 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Development of a Constructive Scheme to Justify the Parameters of a Belt Drive with a Driven Composite Pulley and with Elastic Elements Dilrabo Мamatova, Anvar Djuraev, Alisher Mamatov, Muhammad Ali Turgunov Abstract: The article presents a constructive scheme and the principle of operation of the developed belt drive with a composite driven pulley with elastic elements. The technique and electrotsenometric scheme of the experimental setup for changing the loading and driving conditions of the recommended belt drive with composite driven pulleys with a rubber shock absorber are presented. The results of experimental studies on the loading of the shafts and the rotational speed of the transmission pulleys for various rubber grades used in composite pulleys are presented. The results of full-factor experiments to optimize the parameters of a belt drive, as well as the results of production tests of a cleaning machine, in the drive of which the recommended belt drive is used, are presented. Full-factor experiments substantiated the values of the rotational speed of the drum, the tension roller eccentricity and the stiffness coefficient of the elastic element, which provides a high cleaning effect. Keywords: belt drive, composite pulley, rubber bushing, tension roller, torque loading, cotton cleaning efficiency. I. INTRODUCTION It is important to ensure uniform rotation of the output pulley associated with the working body of the technological machine [1,2,3,4]. But, in a number of technological machines, uneven rotation of the working member with the required amplitude and frequency is required. The need for rotation of the driven shaft (working body) with a variable angular velocity is due to the fact that in some technological processes this leads to an increase in the effect of the operation of the machine. For example, the message of the working bodies of uneven rotation improves the quality of loosening and cleaning of fibrous material. For this purpose, belt drives with variable gear ratios [5] are used. Belt gears with variable gear ratio are used as an element of drives of various machines and mechanisms ensuring rotation of the driven shaft with variable angular speed: vibratory machines, machines for processing fibrous and bulk materials, mining and drilling machines, etc. Resource-saving belt drive modes, the depreciation of the oscillations of the loads by the transmission belt is insufficient. To increase the damping of load oscillations, we recommend a belt drive with a composite driven pulley with an elastic element (Fig. 1). Revised Manuscript Received on February 04, 2020. Dr. Dilrabo Mamatova, Associate Professor, Department of Machine science and service, Tashkent Institute of Textile and Light Industry. Dr. Anvar Djuraev, Professor, Department of Machine science and service, Tashkent Institute of Textile and Light Industry. Dr. Alisher Mamatov, Professor, Department of Mathematic and IT, Tashkent Institute of Textile and Light Industry. Dr. Muhammad Ali Turgunov, Associate Professor, Department of Mechanical and Aerospace Engineering, Turin Polytechnic University in Tashkent. The drive pulley 1 by means of the belt 3 informs the rotation of the driven pulley 2, causing the tension roller 4 to rotate. Rotational movement from the rim 5 through the annular elastic sleeve 7 is transmitted to the hub 6 rigidly connected with the shaft of the driven pulley 2. During the execution of the technological process, the load on the shaft of the driven pulley 2 changes to the shaft of the machine and further on the leading pulley 1 and on the electric drive. In this case, the peak values of the moment of resistance (load) are depreciated by an annular elastic sleeve 7. By choosing the necessary elastic-dissipative properties (rubber material), you can control the degree of depreciation of the peak values of the load. At the same time, the rotational movement of the rim 5 of the driven pulley 2 is sufficiently smoothed out. But, obtaining the movement of the pulley 2 with the necessary law of variation of the angular velocity can be obtained with a change in the eccentricity of the tension roller. If the eccentric tensioning roller 4 is made composite with an elastic sleeve, then the law of motion of the output pulley will be more complex. Fig1. Belt drive with integral driven pulley and eccentric elastic tension roller. II. METHODS AND RESULTS OF THEORETICAL STUDIES In the process of transferring the belt, the belt slip along the pulleys changes and the belt tension also changes. With a change in the tension of the belt, the deformation of the elastic bushing of the tensioning roller also changes. This leads to a decrease in the working radius of the tensioning roller. There is an alignment of the belt tension, leading to a uniform rotation of the pulleys of the belt drive. In this case, the determination of the kinematic characteristics of the belt transmission is important.