Modeling of the design of a vibratory separator with a pendulum suspension by means of CAD/CAE systems
Students Name: Pylypiuk Roman Vasylovych
Qualification Level: magister
Speciality: Computer Engineering in Mechanical Engineering
Institute: Institute of Mechanical Engineering and Transport
Mode of Study: full
Academic Year: 2023-2024 н.р.
Language of Defence: ukrainian
Abstract: The technological process of separation is an important component of the production of many products. The quality of the separation, its speed and productivity have a significant impact on the quality and functionality of the final product. In the modern world, much attention is paid to the research and development of the separation process for various mixtures of substances, as well as to the development of universal and highly efficient separators. The object of research is a vibrating separator with a system of cylindrical sieves, a pendulum suspension and an unbalanced drive. The subject of the research is the development of the principle scheme and design of the separator, construction of a parametric model of the separator, parametric optimization of the design of the suspension of the vibrating separator in terms of its strength calculation. The purpose of the master’s thesis is to develop a new design of a vibrating separator with a pendulum suspension, create its parametric three-dimensional model and study its strength to confirm the possibility of reliable operation. The first chapter of the work describes the main classification types of separators and vibrating machines for the separation process. In the second section of the work, the construction of a vibrating separator with a pendulum suspension was developed, which includes a drum with a loading hopper and sieves located inside the drum. The separator also has a vibration drive.The drum is attached to the frame by means of a double pendulum suspension and is set in motion by a vibration drive represented by two imbalances, which are installed symmetrically under the drum near its opposite ends. The movement of these imbalances is provided through elastic couplings from electric motors located on the separator frame. The presence of a pendulum suspension and the arrangement of drive imbalances symmetrically under the drum near its opposite ends leads to resonance passing through the separator at low frequencies. This has the following advantages: a reduction in the power required for driving electric motors, which leads to a reduction in energy consumption during the operation of the separator; reducing the need for strong supports and reducing the material consumption of the structure, which facilitates manufacturing and reduces material costs; reducing the overall length of the separator, which facilitates its placement and transportation; increasing the performance and versatility of the separator, as it can work optimally on different scenes with a reduction in the frequency of oscillations. In the third section of the work, a parametric model of a vibrating separator with a pendulum suspension and a system of four sieves located in the middle of the working body - the drum - was developed. This model contains 101 parts, it includes 3 assembly units. The main part of the separator is a welded structure - a drum into which the sieves for separation are inserted. Other details of the vibrating separator are defined by dimension formulas, which include the main input dimensions of the drum (inner diameter and length) and other derived expressions.The parametric model of the separator is built in the Autodesk Inventor Professional 2022 CAD environment using the bottom-up design method. That is, all parts were designed in the assembly module Assembly with subsequent recording of them in separate files of parts of the Part module. In the model, the minimum ratio of the length of the drum to its diameter is equal to 2 and is determined by the placement of the loading hopper for the mixture. However, when correcting the hopper geometry formula, the diameter of the drum can be even smaller with unlimited length. For reliable operation of the separator, suspension springs require special attention for research. There are two of them. They, being deformed, ensure the oscillation of the drum with sieves and loading and perceive their dynamic weight. The magnitude of the movement of the spring during the operation of the separator in the zone of its attachment to the drum body will determine the amplitude of the oscillations of the drum, and therefore the intensity of separation of the mixture in it. Insufficient stiffness of the spring will make it impossible for the separator to work - it may collapse from the applied load or receive a significant residual plastic deformation, in which case the performance of the function of the spring as an elastic element of the separator design, which ensures the oscillation of its working body, is out of the question. Parametric optimization of the design of the suspension of the vibrating separator made it possible to select the minimum spring size of 5.105 mm, for which the amplitude of the separator oscillations was 7 mm, and the safety factor of the spring would be greater than 1.25. In the fourth chapter, the calculation of the economic evaluation of the design solution is given. The selling price of the separator is substantiated. Key words: vibrating separator, pendulum suspension, cylindrical sieves, imbalance, loose mixture, separation.