Journal of Machinery Manufacture and Reliability

The article examines the influence of the electronic component on the plasma dynamics of flows emanating from electric propulsion engines (EPE) and liquid jet engines (LPRE). It is shown that in both cases the positively charged jet moves surrounded by an electron cloud. Electrons significantly influence the distribution of potential and other parameters in the jet; they can cause oscillatory processes and instabilities, and through self-consistent fields influence the movement of heavier particles - ions.

The aim of this article is to study ways to improve the efficiency of household appliances. As a key direction, modification of lubricants with special additives is considered. These compounds form protective layers on rubbing surfaces. This allows for a significant reduction in wear and tear, preventing the formation of scuffs, improving the antifriction properties of friction components, and restoring the working surfaces in contact interaction areas. The proposed approach is aimed at extending the service life of household devices by optimizing the performance of tribological systems. Particular attention is paid to compounds that can not only protect, but also regenerate worn surfaces during operation.

There are standards that define standards for assessing the operability of removable lifting devices (SRS) of lifting and transport machines and mechanisms. These standards provide for a point-by-point assessment of each type of defect in the SRS. However, this approach does not always allow for an accurate and objective assessment of the condition of the SRS, since different combinations of defects may have different degrees of damage. This is due to the fact that the elements may wear out unevenly and to varying degrees during the operation of the SGP. In addition, various geometric parameters can change, which leads to a complex combination of several defects. Therefore, the expert's experience and knowledge are needed to accurately assess the efficiency of the GST and make a decision on the possibility of its further operation. The purpose of the work is to develop an intelligent decision support system to assess the efficiency of the SGP. This system will be based on operational experience, a statistical database, and recommendations from existing standards. It will allow specialists who do not have much practical experience in the examination of the GST to make informed decisions about the possibility of further operation.

Product quality control allows for the timely identification of faulty equipment and the adoption of measures to restore it. It is necessary to change goal-setting when planning work on the maintenance and repair of production equipment: the main goal is to ensure the specified quality of the product during the processing/assembly process. In quality management systems, the statistical method of quality control of similar parts and finished products is widely used, which is carried out in accordance with the principle of acceptance control according to the method of A.N. Kolmogorov. It is proposed to evaluate consistently the quality of manufactured products according to the following criteria: product performance, correctability of defects, and economic feasibility of correcting defects. The directions for development of quality control methods have been identified.

Tests of a wire rope vibration isolator are conducted at various loading angles. The corresponding experimental diagrams are analyzed. It is shown that at certain loading angles the hysteresis loop in the diagram has an asymmetric shape. To account for this effect, it is proposed to estimate the effective stiffness coefficient of the vibration isolator using linear loop interpolation. Calculations show that estimating the stiffness using the proposed method yields lower coefficient values compared to the traditional method.