ENERGY SAVING BY REPLACING UNLOADED ENGINES OF NON-STANDARD EQUIPMENT FOR ROLLING STOCK REPAIR

It is established that at various technological processes at repair of a rolling stock of railways electric drives of the universal non-standard equipment can constantly work in essentially underloaded mode that leads to deterioration of their power indicators. The aim of the work is to quantify the reduction of active power losses when replacing constantly underloaded asynchronous motors of unregulated electric drives of universal non-standard technological equipment used in the repair of railway rolling stock with less powerful ones. In this work, the subject of research are the motors of electric drives of this equipment. The analysis of technological processes at repair of a rolling stock, technical characteristics of the specified equipment is carried out and the conclusion is accepted that first of all it is expedient to investigate efficiency of replacement on the equipment of the established engine on less powerful at carrying out at the specialized enterprises of such technological processes warehouse (wheel pairs, traction motors, auxiliary electric machines, frames of rolling stock carts, etc.). The load of the electric motors of transport trolleys of equipment is proposed to be defined as the ratio of the weight of a large unit of electric locomotive, diesel locomotive, electric train and other types of rolling stock to the carrying capacity of universal non-standard equipment of transport trolley. The term "universal" equipment is introduced in the work, which means equipment for performing a certain technological process in the repair of various large units of different types of rolling stock, as well as "specialized enterprise" specializing in the repair of rolling stock, large units which weigh significantly less, than the load-lifting capacity of the transport cart of the equipment. Therefore, the motors of electric drives of universal equipment at these enterprises are constantly operating underloaded. Also actions for quantitative assessment and reduction of active power losses in the electric drive motor are offered.

Equipment for thermal production

The demand for efficient and high-quality heat treatment creates certain requirements for thermal equipment. Thermal equipment that perfectly meets the task of modern production enterprises is a universal vacuum furnace. The requirements of modern production are the boundary conditions for equipment manufacturers, focusing them on the need for universal equipment capable of rapid wide production maneuvering to ensure the possibility of mastering and releasing new products at minimal cost. As a result of practical research and development, focusing on the world experience and the real need for operation, the company Sistem Teknik presents in the article vacuum thermal equipment for universal use — All in one. The equipment is controlled automatically; all parameters are controlled by the process controller in accordance with the programmed cycle. The main advantages of operating All in one equipment from Sistem Teknik are the following: high productivity, minimizing human involvement in technological processes, high accuracy of all operations, long service life, flexibility of settings, the ability to process a huge range of materials, the ability to perform a full processing cycle without removing the load from the furnace, reliable equipment design that guarantees stable and safe operation, easy maintenance, quick changeover and obtaining uniform high processing results, the classic layout that guarantees high repair adaptability or maintainability, which is characterized by the possibility of eliminating certain structural damage with minimal time. The requirements of modern production are the boundary conditions for equipment manufacturers, focusing them on the need for universal equipment capable of rapid wide production maneuvering, to ensure the possibility of mastering and releasing new products at minimal cost.

DEVELOPMENT OF A MATHEMATICAL MODEL FOR THE RESEARCH OF THE DYNAMICS OF VIBRATION MILL WITH TWO DRIVES FOR BULK MATERIALS FINE GRINDING

Reducing by grinding the size of various materials as raw materials for its further use is an urgent applied task. The requirements for the final product obtained by fine grinding are its homogeneity in shape and size of individual parts. It is necessary to reduce the time of the grinding operation, reduce energy consumption to obtain a unit of product of the required quality. One way to solve the problem is to use high-tech universal equipment, namely mills for fine grinding of materials. One way to solve the given problem is to use high-tech universal equipment, namely mills for fine grinding of materials. Their optimal design, construction, manufacture and operation are ensured by studying their dynamics at the stage of their development. In particular, such a study of the dynamics can be carried out on the basis of previously created mathematical models of these mills. The use of computer technology and appropriate mathematical CAD systems will speed up and optimize the process of studying the dynamics of the corresponding mill of fine grinding of materials. The purpose of the research is to build a mathematical nonlinear parameterized model of vibrating mill with two drives for bulk materials fine grinding for further study on its basis the dynamics of the mill with the development of optimal designs for mills with similar structure and the principle of operation and selection of optimal modes of operation. The mathematical model is presented as a system of expressions describing the of the mill points motion, which will include in the form of symbolic symbols all its parameters (kinematic, geometric, dynamic, force). This model is constructed using the Lagrange equation of the second kind and asymptotic methods of nonlinear mechanics. The mathematical model for studying of the dynamics of vibration mill with two drives for bulk materials fine grinding is nonlinear and universal. The non linearity of the model makes it possible to adequately determine of the above parameters influence on the amplitude of oscillations of the mill working chamber as the main factor in the intensity in the technological process of the fine grinding bulk materials fine grinding. The possibility of a wide range of changes in the parameters of the mill in the obtained models makes it universal based on the possibility of application for the study of dynamic processes in vibrating mills of different types with two or one drive which are different by shape, size, location of the suspension and more. This model can also be used to develop optimal designs for vibrating mills for different industries, which will be used to grind different types of materials in different volumes and productivity.

Universal equipment for determining traction resistance of working bodies and their combinations designed for soil treatment

The article describes a strain gauge measuring system designed for measuring the traction resistance of tillage bodies and their combinations. Technical tools measure the traction resistance of the whole machine or one working body which is not an objective and reliable characteristics of combined tillage units. The design and principle of operation of the tensometric measuring system designed and manufactured by Samara State Agrarian University is described. It is used to determine the traction resistance of individual working bodies and their combinations. The results show that the measurement data on traction resistance are in compliance with the calculated values.

РОЗРАХУНОК ЗУСИЛЬ ФОРМОУТВОРЕННЯ ПАНЕЛЕЙ ПОВІТРЯНОГО СУДНА ПРИ ПОСЛІДОВНОМУ ВІЛЬНОМУ ГНУТТІ НА СПЕЦІАЛІЗОВАНОМУ ОБЛАДНАННІ

The design of a modern aircraft provides for a high degree of panelizing of outline elements which can reach up to 80...85%. This allows to increase strength and rigidity with a simultaneous reduction in weight and improved flight performance of the product by reducing the number of fasteners and riveted seams. Also, the improvement of parameters occurs due to the use of high-strength aluminum and other alloys. However, the manufacture of such panels is time consuming and requires special equipment. At a time when technologies and equipment for the manufacture of single-curvature panels are fairly well developed, it is still difficult to manufacture panels with variable twist (washout) of cross-sections on the existing universal equipment with the prescribed accuracy. Basically, for the manufacture of such panels free bending, requiring a large number of finishing works is used. The use of universal equipment such as Sheet Stretch Forming Press is also not sufficiently effective, since the form die produced individually for each part and has a high price. To overcome the existing shortcomings it is proposed to use a multi-point controlled roller punch and a die, the shape of which is set by the CNC device according to information from a digital mock-up. A design diagram for determining the acting forces on the rollers of a multipoint punch during the sequential formation of the workpiece was developed. A method for calculating the technological parameters of the panel forming process is presented. It allows to determine, in particular, the total force required to feed the rollers of multi-point punch, the values of the transverse compensation angle of the rollers of multi-point punch and the number of deformation strokes. The initial data for the implementation of the process are determined, the scheme of the process of forming a panel with variable twist is described. An example of solving the problem of determining the technological parameters of the process of forming a panel on the proposed equipment by the proposed method is given.

Универсальный модуль для протравливания клубней

Кратко рассмотрена актуальность применения современной технологии ультромалообъемного опрыскивания и универсального оборудования для обработки картофеля защитностимулирующими препаратами. Приведены особенности конструкции универсального модуля, рассмотрен его технологический процесс и приведены основные качественные показатели работы.The urgency of application of modern technology of ultralow volume spraying and universal equipment for processing potatoes with protective and stimulating preparations is briefly considered. The design features of the universal module are given, its technological process is considered and the main qualitative indicators of work are given.