Research of the problem of optimization and development of a calculation method for two-stage chain drives used in heavy industrial vehicles in conditions of economic efficiency

The article is dedicated to the problem of optimization of chain drives of the drilling unit. At present, increasing the power per machine to the optimal limits, reducing the material and energy consumption per unit capacity of the machine, as well as operating costs are considered topical issues. The machines that are designed and constructed to optimal limits must be very powerful and productive. The machines that are applied to perform drilling works in the oil and gas industry must be easy to operate, reliable and have ability to operate for a long time. When constructing such machines, their being lightweight, economical, as well as their preparation in a short time and at low cost should be taken into account in advance. In order to ensure the reliable operation of drilling rigs, it is more expedient to apply chain drive in their mechanical transmission. First of all, the application of chain drive in drilling units and hoisting mechanisms is considered. Then a calculation method was developed for the chain drives of the drilling unit used in deep exploration wells and the exploitation of wells, and, accordingly, the calculation of the chain drive was carried out. The chain drive consists of drive and driven sprockets and a chain that encompasses the sprockets and engages in their teeth. Chain drives with several driven sprockets are also used. In addition to the basic listed elements, chain drives include tensioners, lubricating device and guards. The chain consists of hinged links that provide mobility or “flexibility” of the chain. Chain drives can be performed in a wide range of parameters. The calculation took into account the quality of the material, the service life and durability of the chain drive construction

Development of Jacketing Machine

Flat Belt is manufactured almost all over the world. In the Transmission Industries, Flat Belt is almost available in every part. In modern trend demand has been significantly increased. To fulfil the increased demand for flat belt, jacketing operation of flat Belt must be paced up. In traditional jacketing processes which are carried out manually take more time, labour work and also provide damage to industry growth. To overcome this and to minimize stress on workers, an attempt has been made to design a jacketing machine for flat belt, which is simple in design and can be handled by the common man. The demand for a flat belt jacketing machine is higher and it is time to respond to the problem raised. Designing and fabricating such types of functional machines is important to save money instead of investing money and time buying labor and conventional tool. Since metal resources are declining and their products are very expensive as compared to rubber, it’s preferable to use Rubber flat belts rather than using chains for transmission. As per the studies, it is easier and economical to use belt drives replacing chain drives and it is good for the future without disturbing the ecosystem. Study shows that while analyzing the force and power for machines the designer takes the help of analysis software. The cost of software for analysis is high. So there is requirement to find simple formula. In this paper the various theories regarding bending are reviewed, formulae for force and power calculation are collected and finally a case study is taken where we have put together all the results of these formulae. Our main concern is to reduce the human effort required in jacketing of flat belt and also to save the time, labour work, lead time, and move towards the partial automation. The machine has been designed and developed to minimize the cost of production and increase the efficiency.

Planar dynamic modelling of round link chain drives considering the irregular polygonal action and guide rail

Round link chain drives can be sorted into the transmission, parallel conveyor and non-parallel conveyor systems according to their applications and guide rail’s layouts. The polygonal action in these systems is irregular. Compared with the literature, this paper proposes a more accurate modelling approach to capture the dynamic behaviour of round link chain drives, which can consider both the irregular polygonal action and non-parallel guide rail’s layout. The dynamic models of the three types of round link chain drives are developed based on the finite segment method. The chain is divided into multiple discrete segments that are connected by Kelvin models. To account for the irregular polygonal action, the sprocket is equivalent to an irregular polygon. To consider the non-parallel guide rail’s layout in the conveyor system, the chain segment out of the guide rail and the corresponding sprocket are treated as a swinging-block mechanism. The proposed approach is applied to model a scraper conveyor. Simulation results show that the irregular polygonal action and non-parallel guide rail’s layout greatly increase the fluctuation of the chain tension force.

“Five Targets” management strategy of formulating international standards for energy enterprises

There are many problems in energy enterprises, such as insufficient understanding of internationalization, serious shortage of international talents, unthorough investigation of the rules of international standards organization, and inadequate transformation of existing achievements into standards, which seriously restrict the development of international standardization. The article relies on the research on management strategy of the State Grid Shanghai Electricity Research Institute, and proposes a “Five Targets” international standardized formulation system, which develops the closed-loop value chain of platform operation, professional focus, processed management, refined control, and industrialization development. The chain drives the implementation of the world’s leading strategy of energy enterprises, builds an international technology standard ecosystem, enhances the international influence and global competitiveness of energy enterprises, and opens up new areas and new prospects for building a world’s leading urban energy internet enterprise with Chinese characteristics.

Power loss reduction in timing chain drives by adjusted tensioning and surface structuring

Purpose Energy losses in a timing chain drives are caused by friction in chain-rail contacts. To improve the efficiency, the Chair of Machine Elements and Transmission Technology at the University of Kaiserslautern developed various experimental and simulative analysis tools as a part of the German Research Foundation (DFG)-funded 1551 priority program and the DFG Collaborative Research Centre CRC 926. With these tools, various approaches for improving the efficiency were investigated. This paper aims to illustrate the approaches and present the results achieved within the framework of the above-mentioned priority program. Design/methodology/approach A towed cylinder head test rig is used for efficiency tests on timing chain drives. In addition to the experiments, a multi-body simulation model of the timing drive was developed and used. Findings It was possible to find positive approaches to reduce friction power by adapting the chain tensioning force as required. This was ensured for both the stationary operating points and the transient operating processes. An efficiency improvement of up to 10 per cent could be detected. Furthermore, a possibility was found to improve the frictional power by a targeted lubrication of the chain-rail contact. Here, the efficiency could be improved by 5-6 per cent. In addition, various structures were examined on a microscopic and macroscopic level. Neutral to negative results were achieved here. Originality/value This paper makes a contribution to improve the energy efficiency of timing chain drives. Different approaches have been investigated and evaluated.